When the auto-complete results are available, use the up and down arrows to review and Enter to select. This detail shows a lifter at 10 degress with 2. The injection mold lifter design is an integral part of injection molding processing. When the Injection mold opens, the lifter along the horizontal direction movement to make plastic parts out of the undercut. . TheseThis video contains several injection mold delicate delay mechanisms for ejection and core pulling. Recap of Key Points. For injection molding, there are some common troublemakers during part design: Clips and snap fits2. In the injection mold mechanism, the lifters is used to form the internal undercut mechanism of the product. 4 Roller Ball Bars or Die Lifters 3. This comprehensive guide will explore the differences between conventional and precision injection molding, the challenges faced in this process, troubleshooting common problems, the importance of areas of precision,. Lifter: The injection mold lifter is an essential component that makes the whole injection molding process successful. VectorForm Lifter Systems offer three types of slide bases to meet the needs of your applications. For the molding inserts, we do lot for our customer, including main core insert, main cavity insert, core sub-insert, cavity sub-insert, lifter, slider insert and so on. Multiply the desired depth by the desired width and you get the flow area in square inches. Designing an effective injection molding slide r is a crucial part of the mold creation process. . For this type of plastic injection mold tooling, we use pre-hardened steel material, such as 1. 003 in. Typically, the ejection system in an injection molding setup works with the ejector pins. All molds should have eyebolt holes on the top side. The hair dryer housing is the outer casing that protects the internal components of the hair dryer, such as the motor, fan, and heating elements. It is. Propane Powered. Engaged in mold production, manufacturing and processing for five years, exported to major countries around the world. After the part has cooled, the lifter pushes up at an angle, which removes the undercut section from the mold, and retracts from the undercut during ejection. Upmold is a manufacturer that specializes in the Plastic injection mold, Die casting die, Trim die, Fixture, components machining, and injection moulding parts, We service to the. An injection mold slider is a tool used in the injection molding process. oem/odm injection mold lifter design Ejection Force. This mold was created for my Mold Design class with Mark Hill at Ferris State University. It helps create uniformity and consistency in the final product. Another conventional injection molding die for valve lifters is shown in a cross section in FIG. Determining how the part will be placed in the mold is critical. An injection molding lifter is a mechanical component used in injection molds to facilitate the ejection of molded parts with complex undercuts or features. You may or may not have heard of drafting in relation to injection molded parts. By positioning the parting line right on the protruding feature, you can avoid the undercutting problem. Second-stage pressure, mold temperature, cooling time, melt temperature, and possibly a fast injection speed. And a core mold 5 having a core portion 5a which is a cylindrical convex portion loosely inserted in the cavity. 5 or more degrees is required for heavy texture (PM-T2). 2101 Lifter Injection Molding Sprung Core product market, With strict quality control Lifter Injection Molding factories, Producing. Smooth performance is attained due to the U-C. Custom insert molding is a manufacturing process that involves combining metal or plastic inserts with molten plastic to create a finished product. Bumpoffs. Sprue Adjuster - SA. Taking into consideration design features like cams and lifters can further complicate this. . High Precision Plastic Mold Injection Mould (ISO9001)Welcome to Sincere Tech, a leading plastic mold company located in Qiaotou Town, Dongguan city of China, We specialize in creating high-quality plastic molds for a wide range of industries, including automotive, electronics, medical devices, and ship products to America, Europe, and the world. The significance of well-designed Injection Mold Lifter Design cannot be overstated in the realm of Injection Mold Lifter Design. Lifters are moving mold inserts that are set at an angle and will travel with the part as the mold opens and because they are set at an angle they tend to slide relative to the part during the mold opening motion, releasing from beneath the undercut area. molds. The deposition temperatures can range from 200° C to 500° C and typically. 2 Structure of Injection Mould. . Min Order: 1. A) Mechanical injecion mold Slide Design Standards (refer to drawing S2-1 & S2-2): 1) All shut-off surfaces must have a minimum of three degrees draft in direction of slide travel. These specialized components help in the ejection and release of molded parts from the mold cavity, enabling manufacturers to. Whether you need full-turning, partial swivel, or motorized lifting equipment, our line of die handlers do it all. Mould Lifter (804 products available) Custom mold Lifters with 1. Injection molding lifters consist of a blade-like or pin-like lifting mechanism, an ejector plate, and a retainer plate. 3. Injection molding lifters consist of a blade-like or pin-like lifting mechanism, an ejector plate, and a retainer plate. In the first place, fits are utilized by oem/odm industrial injection moulding design factory to firmly find one segment inside another, for example,. 5) Most parts will have a tendency to “ride” with the lifters (remaining on the detail formed by the lifters), which will not let the parts fall free. The ejection system alone has several considerations. Some manufacturers of molds also engage in the manufacture of parts. Lifter is use for release internal undercut from component. square), part-sticking issues, fitting/spotting, and timing/preload. The injection mold lifter is an essential component that makes the whole injection molding process a success. The hand-loaded piece is ejected with the finished part and removed. This design is the same as movable mold lifter. material is formed from an amorphous shape into a fixed shape defined by a mould tool. Below is a detailed injection mold lifter design guide: Step 1: Analyze the Part Design. It is. 80,000 LBS Capacity – Efficient Electric Power. If you need assistance, you can always contact an applications engineer to discuss your design at 877-479-3680 or customerservice@protolabs. Trimming Knife - QR. 038 mm) 11. B) Hydraulic injecion mold Slide Design Standards. This post is part of our Designing for Injection Molding series. Detachable separation design, easy and fast installation, is the best choice for mold inserts and machine precision parts. Plastic Injection Moulding Machine. Engaged in mold production, manufacturing and processing for five years, exported to major countries around the world. It is. Designing for plastic injection molding is like raising teenagers—some parts (and some teens) are more challenging than others. In a world where customers have…ROEMHELD Hilma is a worldwide market leader in quick die change systems and products. 2. From a processing standpoint, reducing the injection pressure, hold / pack pressure, hold / pack time, melt temperature and mold temperature can all be tried to help eliminate the part sticking issues. 8. We'll learn how to calculate angle and stroke in lifter. Tooling, or molds, is a crucial component in injection molding. Learn what an undercut in injection molding is and how to design your part avoiding undercuts. Therefore, ejector pins injection molding involves the removal of completed parts from the die molds. When you choose us, you’re getting access to an entire spread of lifters, including: Full 360° Turning Platforms. This idea is nothing new for the injection molding industry but at Fortify we take it to a whole new level with our 3d printed mold tools. The lifter is a feature incorporated into the molding section of injection molding. 4. It also provides stability and grip for the user. So how do the mold design engineers of pintejin molding solve this problem? 1. , a porous structure with micro/nano pores, on the metal plate while flowing in the mold cavity where the. Today. It is employed to handle specific shapes or structures within the mold, often utilized for creating internal undercuts or com. The student will learn in detail ejection system, injection system, cooling system, venting, gates and graining. Common ejector options include pins, blades, sleeves, bars, stripper plates and lifters—and each option brings its own tradeoffs. These slides play a pivotal role in enabling the production of complex parts with undercuts, threads, and intricate features. Plastic Injection Mold Lifter, Double Teeth Lifters $50. The designers of the injection mold processing plant found that if there is no preset gap in the mold design, it will lead to many problems such as poor assembly and needle breakage and needle burning when ejecting the mold. It can cause the through holes in the core insert to wear out with elliptical or egg-shaped holes. Smooth performance is attained due to the U-C. Rather than use a side-action cam, an insert is machined so the undercut can be applied and is bolted into the mold where a pocket matches the insert dimensions. The Lifter System shown is made of standard components to simplify mold design and construction. There are two situations when mold cleaning is required: (1) offline when the mold is on the bench and is cold (room temperature) and (2) online when the mold is warm and still in the press. As shown in the figure as below , the lifter is placed in the angled hole of a fixed mold plate. The latest products introduced on the market also cover big undercuts (up to. 4 Roller Ball Bars or Die Lifters 3. Design bosses with an outer diameter equal 2x the nominal diameter of the screw or insert. The sharp edge can easily have a radius added to it in the press. The injection mold designer should follow the preferred order of ejection types. These companies are known for their advanced technology, innovative designs, and commitment to quality, and are leaders in the global injection molding industry. molds. Lifters In Injection Molding. Use the insert seams on side; 3. The first step in designing a lifter for injection molding is to analyze the part design. In most cases, the lifter rod or shank will be shortened by 0. Upon cooling the molten material in the mold, both. Texas Injection Molding engineers work with our customers to develop and design the most robust plastic injection molded products. Summarizing the key points underscores the importance of injection mold slides in modern manufacturing, highlighting their role in achieving intricate designs and improving efficiency. Mold actions like threaded cores, lifters, and slide actions add cost. . Lifters for injection molding can be classified as integral or non-integral. Injection moulding (U. Discussions of forces on the pin, most favored. They play a crucial role in injection molding, allowing the production of complex parts with undercuts on both the exterior and interior surfaces. Mold Action /. 2738H, P20, 1. MoldWatcher™ can be installed on horizontal and vertical shuttle or rotary injection molding machines and die-casting machines. Here are 15 types of side core pulling mechanisms for injection mold. What is a lifter in mold design? #molddesign #injectionmold A lifter is a mechanism used in the design and manufacturing of molds, typically in plastic injection molds or die-casting molds. Injection moulding is a formative manufacturing technology, i. Injection-molded parts are often parts to sell as a brand new product. They play a crucial role in injection molding, allowing the production of complex parts with undercuts on both the exterior and interior surfaces. In This Tutorials We'll Discuss lifter calculations of Plastic Injection Mold Design. The duo series is one of the most energy-efficient machines of this type - with up to 55% less. Air Valve - VA. Randy Kerkstra recently. Injection mold angle lifter is the mechanism in the injection mold to release the plastic molded parts undercut and ejector the part out off mold. The first step in ordering your custom plastic packaging containers would be to determine the size and shape of the container that you need. other components within the mold. Ideal for plastic injection producers and aluminium foundries. Including kinds off Mold and Die Components, such as Injection Mold lifter. Plastic injection molding utilizes thermoplastics and thermoset materials to produce plastic components for various products. Baby Crafts. This is a cut away of a basic lifter mechanism. Injections. The lifters are supported by T holders at the bottom to slide in ejector plate and locked by allen screws. At its most basic level, the slider is used to turn the vertical. Kehui Mold is a professional production and processing company in the plastic moulding industry, specializing in the industry for more than 8 years, and has accumulated a lot of practical experience. These allow the actions to collapse inward, providing clearance for part ejection. The parting line location on the injection mold will have an effect on how the cavity and core (both halves of the injection mold) come together and seal. Wherever feasible, all details should be marked with steel type and Rockwell hardness approximately . 5% ~ 0. 1) All mechanical slide design standards relative to shut-off, molding surfaces, and. But the power comes from the clamping force of plastic parts to the lifter and spring. Plastics injection molding is a sector that is becoming increasingly competitive due to the environmental issues it entails, pressuring consumers to reduce its use. An injection molding lifter is an essential component of the injection molding process that slides and pulls the cavity steel away from the undercuts in the die as the ejection. It’s a passage that connects the molding machine’s nozzle to the cavity of the mold. Injection molding gate is the entry point through which molten material is injected into the mold cavity. Join 11,340,000 engineers with over 5,460,000 free CAD files Join the Community. Single-Rod Lifter Systems. This is the reason plastic injection molding is broadly utilized in the present business. Especially for the injection molding core insert and metal inserts for plastic, has a complete process design mechanical operation of the site. Injection molding is one of the advanced manufacturing technologies for the low-cost and reliable production processes. When the launch powers on the embellishment have been assessed, the following stage is to decide the total”push territory” of the ejectors onto the shaped part. Very high quality and an extreme fit may cost more. Rather than use a side-action cam, an insert is machined so the undercut can be applied and is bolted into the mold where a pocket matches the insert dimensions. Considering all the variables involved will help determine the overall injection. Definition and Function: The mold cavity is a crucial component of injection mold slides, representing the void into which molten plastic is injected to form the desired part. Fixed mould lifter structure -2. Spring driven Mechanism. Description. Sroka Die and Mold Transporters are superior to using fork lift trucks or overhead cranes when moving molds between storage and injection molding production areas. Due to the constraints of the mold tooling and molding press, these side cores and lifters have a limited depth or pull. Here we'll calculate Lifter angle & Strokes. The reasons and corresponding solutions are described as follows: 1. 2. Made from durable steel or aluminum alloy, it provides stability and support to withstand the pressures and forces involved in the injection molding process. No special coatings are necessary. 002-0. 0 unit. PMMA and POM, the mold needs to be heated during plastic injection molding. The major contribution for the lifters scoring was the load of the molded part itself. Watch on. 005 deep. Designing an effective injection molding slide r is a crucial part of the mold creation process. The radiused dovetail design lets the core blade seat automatically at the required angle with the mold closed. Home | AdientSOLIDWORKS mold design tutorial on making Injection Molding plastic. CNC custom parts mold automatic lifter for plastic injection molding $50. Learn more about Injection Mold Lifter Design. alloys in injection molds C17200 (A), C17510 (B) and C18000 (C) against H-13 and 420 SS. PCS Company mold components are designed and manufactured to exceed demanding customer expectations for quality, reliability, and performance. Progressive's UniLifters® System is the most widely used, standard product for molding and releasing undercuts. When there is no K/O holes next to the undercut, the lifter must be reset by the putter. It's a single Nozzl. Made of SKD61 steel with nitriding and vacuum heat treatment, these pins offer excellent wear resistance and durability for precision molds. The student willl be introduced in scientific molding. It determines the amount of molten material injected into the mold cavity and influences factors such as filling consistency, part appearance, and material usage. The level of detail. B) Hydraulic injecion mold Slide Design Standards. Essentially, it acts as the entry point for the material that will eventually form the desired product. The engineer needs to consider the. 003 in. 4) Provide a . Lifters. Today Randy takes a look at calculating angles for lifters and how angles can impact mold maintenance. The Lifter System shown is made of standard components to simplify mold design and construction. These components have some clearance to allow for mechanical movement. A lifter is a mechanism used in the design and manufacturing of molds, typically in plastic injection molds or die-casting molds. Comparison of mold. The ejector pins were not sufficient enough to eject the part out in a balanced way. 3d Printing. In this video, you can get what is undercut, types of undercuts, how we can remove undercuts, what is slider & lifter in plastic molding, how to use slider &. An injection molding lifter, also known as a mold lift or mold lifter, is a mechanical device that is used to support and position the mold during the injection. com) that went into more detail on lifters and was a continuation of his previous post. The material is rotated. Mold designers are able to incorporate undercuts twice as deep as previously possible using D-M-E?s new VectorForm Lifter System, designed by Takao Injection Mold Engineering (Chiba, Japan). There is a lot to discuss about lifters: design considerations, materials used, wear surfaces; buddy/helper pins, deflection, shape (round vs. The guide block acts as an angle pin when the mold opens, and as a locking block during mold closing. Additive tooling enables shops to integrate critical cooling and any necessary mold functions in areas where conventional cooling lines cannot be milled or drilled. These allow the actions to collapse inward, providing clearance for part ejection. have two separate mold plates, the “A” plate and the “B” plate. This makes it an ideal choice for mass production of parts and products. 2 Conventional straight-drilled cooling channels The common types of straight-drilled cool ing channels are parallel and series. It includes four types of mechanisms: ejection type, slider type, rack and pinion, and. Injection mold lifter scoring. Virtual instructor led training offers the traditional live, instructor-led training you’re used to from the comfort of your own home (or office). . Premature gate freeze-off will reduce the available packing time in the cavity, which can increase the likelihood of sink marks. Seal Bearing - JR. Tooling Costs. We'll learn how to calculate angle and stroke in lifter. Hand loads: Hand loads, or hand-loaded inserts, are a method of achieving a part feature without designing it into the mold, but rather by hand-loading a. 1 to 2 degrees works very well in most situations. Vacuumjet Seal - JV. It can cause ejector pins to bend and break. On the off chance that you need to create and make another item, you should cause a form to the tool and set it up for plastic injection molding. mold lifter design 【lifter material】 if main inserts use pre-harden steel,then lifter use 1. . 10>. Packing pressure and time significantly affect sinks. Similarly, larger molds require more material and production time, leading to increased. Decatur, IL 62521; Call Today 217-864-4125;. Roller/Ball Bars or Die Lifters are used to lift the rubber mold and provide a roller surface to easily roll the mold in and out during the rubber mold change. There are many variables and impacts that lifters can have on your molding process and final parts. 10 yrs CN Supplier . The lifter structure shown in the figure below can be used. The un. 0 /5 · 12 reviews · "Nice service" Contact Supplier. Complete animation of 2 plate injection Mold design. While full hydraulic pressure during injection is not commonly available — and using standard hydraulic cylinders to move, hold and compress the cores duringThe following SPI Mold classifications are guidelines to be used for quoting and placing orders on the various classes of plastic injection molds. In plastic injection molding applications, PVD coatings are an excellent method to reduce wear and corrosion. 0 /5 · 3 reviews ·This helps to make the injection force applied to both sides balanced. Accounting Manager / Specialize in Injection Molding / Plastic Mold / Die CastingIn this video we will learn about Injection Moulding Machine construction and working in production and manufacturing subjectTimestamps0:00 - Start0:05 - Con. This is done using slides and lifters in the injection mold. Taking into consideration design features like cams and lifters can further complicate this. in 3D Modeling Design. Injection molding parting line or mold split line is a line or surface on an injection molded part where the two halves of the mold meet. The ejection pattern and stroke of the press must correspond to the design of the mold. Similar to the slide, the lifter can be classified into: the integral lifter and the non-integral lifter (combined. Among the others, the cooling step (step 3) is the most dominant stage by occupying roundly 70–80% of the cycle time []. We have die handlers and motorized lifters for any need. High Pressure - VH. . In This Tutorials We'll Discuss Lifter Design calculation for Plastic injection Mold Design. A wide variety of materials can be machined, including stainless steel, aluminum, magnesium, zinc, brass and much more. We’ve created effective, dependable. Injection Molding Car Parts is a highly versatile manufacturing process that involves the production of intricate and precise components by injecting moltenINJECTION MOULD DESIGN. . Randy Kerkstra recently published an article at the Plastics Technology site (ptonline. com 2022-09-14T15:03:15+08:00 Injection Mould Tooling Plastic Mold Making alan. PVD/PACVD surface treatments are applied in a precise, environmentally safe way by deposition from a gas or plasma state through a high vacuum process which ultimately enhances the tool's characteristics with good adhesion, high hardness, and wear resistance. Finally injection molding is carried out for the part. What is Injection Molding Lifter. The engineer needs to consider the. In the molding process itself, multiple settings could be off one way or another. A lifter is a component that moves on an angle with the ejection to release an undercut on a part. This is when the molten plastic has been poured into the mold and is ready to be removed. Published 5 years ago. PTFE injection molding is a process used to manufacture PTFE products by injecting molten PTFE into a mold. Complex Ejection Mold Lifters provide the mechanism for releasing parts with undercuts, threads, or any intricate features. The lifter is typically attached to the ejector plates with a slide and gibs. This product can be used to systematically draw floating plates and inserts. 1-3). An injection mold slider is a tool used in the injection molding process. Sprue Bushings and Runner Bars 2. Why is that? Because the lifter is used at the final stage of producing plastics. 2023年11月22日 / 0 Comments / by Steve Yang. When you partner with Fictiv, your plastics project can use handloads instead of injection molding sliders or lifters. As shown below: (P value is at least 3. The gate as large as possible, and the mold wall at right angles but not more than the wall thickness of the product, the sprue as short as possible. After a part is filled, additional material is packed into the cavity to reduce. The proper solution for absolute precision positioning of press moulds during lifting operations. Cooling: The Teflon is cooled within the mold until it solidifies and takes. Actually, 5 axis CNC is most useful for complex machining. 25K views 1 year ago. Join 9,350,000 engineers with over 4,840,000 free CAD files Join the Community. In this video, you can get what is undercut, types of undercuts, how we can remove undercuts, what is slider & lifter in plastic molding, how to use slider &. There is a cavity and a core lifter from the active position. Simple molds are typically in the $3,000 and $6,000 range while the price for large, more complex, high-production, or multi-cavity molds can cost $25,000 to $50,000 or more. 5. From the active position, there is cavity lifter, core lifter. It consists of two main parts, sides A and side B. In plastic injection molding, core separates from cavity and is drawn in tooling direction. 3 degrees is required for light texture (PM-T1). KTM was established in Ontario, Canada in 1985, with over 35 years of experience. One of the goals of rapid injection molding is to produce parts quickly. This video introduces the plastic housing injection mold structure. Almost every plastic part created today is by injection moulding as it allows identical parts to be created in huge numbers, in a short space of time, and at very low cost per part. Mold Cores, Core Pins and Chill Plates 3. In order to increase the efficiency of the production process, the plastic material is cooled by. Here are some of the Specs:- 4 Cavities- 3 Lifters per Cavity- Slid. This was in turn creating excess load on the lifters leading to twisting or imbalance within the whole of the ejector assembly especially when. Generally speaking, a lifter generally consists of two parts: the body and the forming parts. S = T + 2-3mm (S is the horizontal travel distance of the slide; T is the undercut of the finished product); S = H * sinα-δ / cosα (δ is the gap between the angle pin and the slide, generally is 0. Minimum Thickness/Draft. This rule of thumb applies to parts with mold depths of up to 2 inches. However, when changing from the molten state to the gruel state, it not only has the fast. 8 Hechang Road, Shatousha, Chang'an, Dongguan, China. have two separate mold plates, the “A” plate and the “B” plate. There are times when porous materials like Porcerax are used in problem or backfill areas. 2343ESR material $50. 10 yrs CN Supplier . Cooling channels are typically drilled through the mold cavity and core. Thermal image of a hot spot in an injection mold to show where conformal cooling is required to reduce time to ejection in the cooling portion of the cycle. Our carts increase safety and efficiency! 3550 E. Efficient runner systems minimize material wastage by optimizing the flow of molten material, ensuring that the right amount reaches each mold cavity without excess leftovers in the runners. 1 yrs CN Supplier . Structure of back mould is in the form of press block + oblique pin + slingshot as shown in the figure (sometimes when slider width exceeds 100, and. There are many variables and impacts that lifters can have on your molding process and final parts. After a product solidifies in the mold, an effective method is needed to eject it from the mold. Green Valley custom engineers quick change die transfer carts and mold transfer carts to help meet your needs for lift heights and capacities. Top of the range, it is the expression of the most advanced hi tech. The images above (Figures 1 and 2) show an example of a difficult-to-cool lifter with five molding surfaces. The design engineer must understand the part geometry, including any undercuts or other features that may require a lifter. Keep your most valuable assets, your employees and materials safe by using DME lifting hardware. e. 3) Maximum angle acceptable for lifter travel is 11 degrees without special design considerations. To survive in today’s competitive worldwide. The lifters go in and out of the pocket smooth manually in mold dismantled condition. The complexity, size, and material of the mold impact tooling costs. Injection molding is a manufacturing method in which molten plastic is injected into a mold under high pressure to create complex shapes or components. 1. During injection, full hydraulic pressure is maintained on the cores to pre-vent movement. It is the taper, or degree of inclination, of the mold’s walls along the drawing direction. oem/odm injection mold lifter Ejection Push Part. Progressive Components is an independently operated developer and distributor of componentry and software for the production tooling industry delivering convenience for the mold builder and unmatched tooling performance for molders and OEMs. Maximum operating temperature of 250° F or 120° C. . If the areas where the air is trapped do not have a vent, the pressure of the air pocket will approach the pressure. The Standard Slide Base (SB)is the most flexible and the most economical. The Teflon injection molding process steps can be broken down into the following steps: Melting: The Teflon is melted in the barrel of the injection molding machine using heat and shear. Injection molding is the leading process to manufacture these plastic parts. 5. ManufacturerMold Components including daters, gate cutters, ejector pins, sleeves, blades, and so much more! Visit us today to get started! 800-626-6653 [email protected]. One of the goals of rapid injection moulding is to produce parts quickly. Year Established: 1998. 00. We have specialized in the release of small and medium undercuts even if they are simple, double or round. Mold. Touch device users can explore. The short answer: plastic injection molds cost anywhere between $100 for a 3D printed low-volume injection mold to $100,000+ for a complex multi-cavity steel mold for high-volume production, which generally represents the most significant fixed start-up cost in injection molding. Use Case. 0 /5. . 1) A draft angle of 1½ to 2 degrees is required for most parts. 6. and molding will be to collect each issue to use as a reference in both the applications of the copper alloys and the mold design principles. The injection molding process is quite simple. Reactionary forces and bending moments within conventional lifter core rods require smaller rod angles, which can increase mold die height and footprint. 002-0. Mold lifter. 0. High Pressure - VH. In order to ensure smooth demould of product, distance of movement of slider must be sufficient. Lifters: A lifter is a mold component that travels with the ejection stroke and moves on an angle to slide/pull the cavity steel away from the undercut feature or detail not in the die draw. These are used to create under cuts in plastic parts. An injection molding lifter, also known as an ejector pin or stripper pin, is a crucial component used to push or eject finished plastic parts from the mold cavity after molding. . 11/25/2020 11/25/2020 Klarm Mould. Unlike a slider, which pushes the. Molding parts/components: normally called as cavity and core, which are the closest part with plastic products. 1. Today we will demonstrate the use of the machine core pull feature. A. PCS Company's Lifters assist in accommodating movement or action within the mold.