Injection mold lifter. mold due to a design issue, most often it is set and pulled with the mold closed (see Figure 4). Injection mold lifter

 
mold due to a design issue, most often it is set and pulled with the mold closed (see Figure 4)Injection mold lifter  This philosophy has driven us to offer a collection of Mold Lifting and Rigging hardware that has been certified and proof tested

alloys in injection molds C17200 (A), C17510 (B) and C18000 (C) against H-13 and 420 SS. 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. 10. 6 Double Toggle Clamping Unit (Open) (Sumber : MOLD CLAMPING MECHANISM OF AN INJECTION MOLDING MACHINE, Ito Susumu,et all, 1996) Double Toggle Clamping Unit dirancang sedemikian rupa sehingga kedua toggle. The design point of the snap joint lies in “joint”, i. . 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. Plastic Injection molding can be defined as a procedure, which can help in shaping plastic, in its requisite fold. CUMSA is a family company dedicated to the design, manufacturing and distribution of innovative standard mold components and solutions for the moldmaking and molding industries. 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 &. Generally speaking, a lifter generally consists of two parts: the body and the forming parts. And a core mold 5 having a core portion 5a which is a cylindrical convex portion loosely inserted in the cavity. providing 0. During hot runner injection molding process, the hot runner plate needs to be heated, so the area around the hot runner gate needs to be cooled. The role of the guide device of the mold is to guide the upper mold and the lower mold to match in the correct position. Watch on. The Injection Molding Lifter Mechanism is typically attached to the ejector plates with a slide and gibs. Its unit of measurement is degrees. The customer can select from angled solutions, to flexible parts to minimize the space needed in the mold or to completely mechanical solutions working 90º from the parting line. Spring driven Mechanism. The design engineer must understand the part geometry, including any undercuts or other features that may require a lifter. These are used to create under cuts in plastic parts. Slides or sliders are used to release any external undercuts or recesses on the outer surface of a part that may prevent it from being removed from the mold cavity. • Hot Runner and Cold Runner. Plastic mold is the abbreviation of a combined mold used for compression molding, extrusion, injection, blow molding and low foaming molding. Copyright reserved by: lifter in plastic injection mold is mainly used to form the internal undercuts of a molded plastic part. 2 Conventional straight-drilled cooling channels The common types of straight-drilled cool ing channels are parallel and series. Made of SKD61 steel with nitriding and vacuum heat treatment, these pins offer excellent wear resistance and durability for precision molds. Reach the limit, and then withdraw as a whole. 5MM; C is the stop surface, so generally a. Injection molding is a process in which plastic pellets are melted and injected under high pressure into a mold cavity. Use the insert seams on side; 3. The major contribution for the lifters scoring was the load of the molded part itself. Unlike a slider, which pushes the. Cavity-Lifter Injection Mold. Year Established: 1998. When there is no K/O holes next to the undercut, the lifter must be reset by the putter. It is designed to move vertically within the mold cavity, lifting specific parts of the molded product off the core side of the mold. Gate blush is a molding defects commonly caused at the gate location of molded part, It shows as rings or ripples in the mold cavity surrounding the gate area. Why is that? Because the lifter is used at the. This is an animation of a basic injection mold slide action. In plastic injection molding, core separates from cavity and is drawn in tooling direction. 40. 2. Every year, 55 million tons of plastic are processed to manufacture almost any kind of part. A. Remedies: Raise the temperature of the mold or molten plastic. Tip #3: Add Drafting to Your Parts. Install the slotted slat core in the longitudinal position and set hole. PCS Company's Lifters assist in accommodating movement or action within the mold. 523000. There are different types of lifters. Considering all the variables involved will help determine the overall injection. 0. Lifters for injection molding can be classified as integral or non-integral. 2 Structure of Injection Mould. Essentially acting as the gateway to the molding system, the sprue plays a fundamental role in determining the. square), part-sticking issues, fitting/spotting, and timing/preload. It includes four types of mechanisms: ejection type, slider type, rack and pinion, and. The first step in designing a lifter for injection molding is to analyze the part design. So a lifter needs to be employed in those areas. g. From the active position, there is cavity lifter, core lifter. It can cause ejector pins to bend and break. Plastic injection molding utilizes thermoplastics and thermoset materials to produce plastic components for various products. Vacuumjet Seal - JV. This detail shows a lifter at 10 degress with 2. Watch. VectorForm System components are engineered for the common injection molding environment. Randy Kerkstra recently published an article at the Plastics Technology site (ptonline. 9. com) that went into more detail on lifters and was a continuation of his previous post. oem/odm injection mold lifter Ejection Push Part. Premature gate freeze-off will reduce the available packing time in the cavity, which can increase the likelihood of sink marks. This mold was created for my Mold Design class with Mark Hill at Ferris State University. #5 Arc core pulling mechanism. Germany is home to a number of world-leading injection moulding companies, including Arburg, Engel, and KraussMaffei. The lifter also needs to be cooled when it is big and with a large contact surface with the product. PPS (polyphenylene sulfide) is a thermoplastic polymer that is known for its high heat resistance, chemical resistance, and dimensional stability. Different mold makers also have different approaches to design and fabricate the lifters. The plastic injection molding process can cost anywhere from $3,000 to $100,000 or more. Plastic injection mold lifter design is a combination of the ejection mechanism and the side-core pulling mechanism appalling in the plastic injection mold. 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. 5). Very high quality and an extreme fit may cost more. Using these process changes, singly or in combination will generally eliminate the sticking problem. 8. Injection molding may be one of the best plastic molding processes around, but it isn’t without its flaws. While lifters provide vertical movement to create undercuts, sliders generate horizontal motion that creates grooves or slides on surfaces. When there is no K/O holes next to the undercut, the lifter must be reset by the putter. Angle pin. Depending on the type of molding material, you might use a gate depth that is 50-80% of the part’s wall thickness, and depending on the flow length, the width of the gate being two to six times its depth. This video introduces the plastic housing injection mold structure. It includes several integrated stages which are (1) injection, (2) packing, (3) cooling, and (4) ejection []. As more material enters the mold cavity, it. This philosophy has driven us to offer a collection of Mold Lifting and Rigging hardware that has been certified and proof tested. The radiused dovetail design lets the core blade seat automatically at the required angle with the mold closed. Drafting, or adding a draft angle, allows your parts to be released from the injection mold. . With a vision of tomorrow's fully automated factory, José Rodrigues, CEO of Liftmould PT, has entered into partnership agreements with a manufacturer of overhead cranes, a leading automotive supplier and a manufacturer of injection molding machines, in order to optimize its solutions for the all-electric plant. Whether you need full-turning, partial swivel, or motorized lifting equipment, our line of die handlers do it all. Plastic injection molding is the process of injecting molten plastic material into a metal tool which then cools and ejects a plastic part from the machine. We produce parts in a wide scope of sizes and shapes for any application. Due to Xometry’s Manufacturing Partner Network,. The ModuLifter consists of six different base sizes that accept rods from ½ to 1½ inches in diameter. Injection molding lifters are movable components within a mold that enable the creation of undercuts or features that require an angle relative to the direction of the mold’s opening and closing. The ball adapter rides in the shoe and allows the rod and bar to self-adjust to the correct non-binding position vertically. have two separate mold plates, the “A” plate and the “B” plate. In particular, there is a base push territory that is needed to maintain a strategic distance from. The slider is driven by the oil cylinder to make a circular motion. 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. The CAD files and renderings posted to this website are created, uploaded and managed by third-party community members. The lifter is a feature incorporated into the molding section of injection molding. With a vision of tomorrow's fully automated factory, José Rodrigues, CEO of Liftmould PT, has entered into partnership agreements with a manufacturer of overhead cranes, a leading automotive supplier and a manufacturer of injection molding machines, in order to optimize its solutions for the all-electric plant. In plastic injection molding applications, PVD coatings are an excellent method to reduce wear and corrosion. Learn more. At DME safety come first. Double Valve - VD. There are a few key considerations. The mold is composed of two halves, the “A” side and “B” side. Including kinds off Mold and Die Components, such as Injection Mold lifter. Use Case. Injection Mold Lifter (161 products available) Plastic Injection Mold Lifter, Double Teeth Lifters $50. The sharp edge can easily have a radius added to it in the press. in 3D Modeling Design. 8 Hechang Road, Shatousha, Chang'an, Dongguan, China. As Canada’s leading supplier of custom mold lifters, Hercules SLR engineers and manufactures each mold lifter to our customers’ unique specifications. 005” pad on top of the lifter to prevent part “drag”. The images above (Figures 1 and 2) show an example of a difficult-to-cool lifter with five molding surfaces. After a part is filled, additional material is packed into the cavity to reduce. The ejection system alone has several considerations. 003 in. In order to form the appropriate shape, undercuts require an extra mold material or an internal core lifter. When venting stationary inserts or core pins in rib or part details with venting issues, I recommend no more than 0. 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. Intermold®. Whereas if you are wanting a plastic packaging container in an odd shape, you will be spending a little more. 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. KTM is confident that the products supplied will meet your manufacturing needs. In This Tutorials We'll Discuss Slider and Lifter animation of Classes. 4. All molds, with the exception of prototype, to have adequate channels for temperature control. Three alloys typi-cally are utilized for the mold components, which will have contact with plastic. Green Valley custom engineers quick change die transfer carts and mold transfer carts to help meet your needs for lift heights and capacities. Progressive's UniLifters® System is the most widely used, standard product for molding and releasing undercuts. 2023年1月4日 / by admin. Today Randy takes a look at calculating angles for lifters and how angles can impact mold maintenance. 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). Any shut-off angle less than three degrees must have written customer approval. 10 yrs CN Supplier . Whether you need full-turning, partial swivel, or motorized lifting equipment, our line of die handlers do it all. 5 or more degrees is required for heavy texture (PM-T2). Mold lifters offer a safer and faster method of moving molds versus chains. Smooth performance is attained due to the U-C. 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. . In most cases, the lifter rod or shank will be shortened by 0. When you choose us, you’re getting access to an entire spread of lifters, including: Full 360° Turning Platforms. Film gate – this type will be applied to the plate-shaped molded product. This technique can also be used to deal with the objective creations, associated with the various shapes and sizes. When you choose us, you’re getting access to an entire spread of lifters, including: Full 360° Turning Platforms. It helps create uniformity and consistency in the final product. 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. . Another conventional injection molding die for valve lifters is shown in a cross section in FIG. Multiply the desired depth by the desired width and you get the flow area in square inches. This content and associated text is in no way sponsored by or. In This Tutorials We'll Discuss Lifter Design calculation for Plastic injection Mold Design. 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. Processing according to Cavity-Lifter Injection Mold standards. 1. Locking Swiveling Wheels. For this type of plastic injection mold tooling, we use pre-hardened steel material, such as 1. Injection mold lifters are essential components in the field of injection molding, serving a critical role in the ejection phase of the process. Recap of Key Points. This allows the lifter to clear the undercut for ejection to take place. providing 0. It is typically mounted on the moving half of the mold, and it helps to lift the mold off the stationary half of the mold during. For Our Paid Online and offline A. The design engineer must understand the part geometry, including any undercuts or other features that may require a lifter. Injection molding is a manufacturing process that involves injecting molten plastic into a metal mold to assume the shape of the mold. 2. Design bosses with an outer diameter equal 2x the nominal diameter of the screw or insert. This video will explain how to injection mold lifter work? Lifter used to solve undercut, when ejector plate moving, lifter will move as lifter. Products From DME - Here You Can Find Thousands of Our Products In Stock From Standard Mold Bases To Plates, Pins, Insulator Sheets & So Much More! 800-626-6653 [email protected] PRODUCTSPlastic in Injection Molds The high thermal conductivity of copper alloys makes them ideal materials for the injec-tion mold sprue bushing and runner bars. We’ve created effective, dependable. The pressure of the air pocket increases until the required pressure is achieved to push air out of the mold vents. There are many variables and impacts that lifters can have on your molding process and final parts. Other mold actions include lifters, wedges or slifters (a new term), raising members and slides (sometimes referred to as splits, cams and side action). A short, yet informative, description of slide design and other issues can be found in section 12. This post is part of our Designing for Injection Molding series. The guide block acts as an angle pin when the mold opens, and as a locking block during mold closing. Mold Action /. Small batch plastic injection molding. oem/odm injection mold lifter Ejection Push Part. The U-coupling travels freely in the T-Gib when the mold opens. Quality issues are always present, and this can affect the safety, function, and performance of the product in question. There are some benefit from our product: Our customers just need to do mold base then assembly the tool is ok, in this case our coustomers can save a lot of time and guarantee. This was in turn creating excess load on the lifters leading to twisting or imbalance within the. In this series of lectures, you will learn the easiest explanation of injection mold design calculations, this lecture will help you to understand how to des. So how do the mold design engineers of pintejin molding solve this problem? 1. Mechanical injecion mold Slide Design Standards, Hydraulic injecion mold Slide Design Standards, Injection Mold Lifter Standard, injection mold. Slides can be either mechanical or hydraulic and are expensive. When Injection mold opening, the lifter along the horizontal direction movement to make plastic parts out of the undercut. operating pressure: 400 bar. When there is an undercut on the inner surface of the side wall. The injection mold lifter is an essential component that makes the whole injection molding process successful. Why is that? Because the lifter is used at the final stage of producing plastics. Especially for the injection molding core insert and metal inserts for plastic, has a complete process design mechanical operation of the site. 6. This design eliminates the. We stand behind these products and are confident they are the highest quality in the industry. Molds could be a few thousand dollars or hundreds of thousands. B) Hydraulic injecion mold Slide Design Standards. 0 /5. What is Injection Molding Lifter. Shop. 2738H, P20, 1. 2101 Lifter Injection Molding Sprung Core product market, With strict quality control Lifter Injection Molding factories, Producing. . Our comprehensive range of coatings is designed to meet our customers’ exact specifications, offering a diverse selection that includes high micro-hardness coatings for abrasive materials such as glass, as well as corrosion-resistant. D-M-E Company introduces pre-engineered lifters with angles up to 30° and more September 2003 - D-M-E doubles undercut capability in plastic molds with the new VectorForm (TM) Lifter System. Common ejector options include pins, blades, sleeves, bars, stripper plates and lifters—and each option brings its own tradeoffs. Bumpoffs. It is employed to handle specific shapes or structures within the mold, often utilized for creating internal undercuts or com. Precision injection moulding is a specialized process that offers unique benefits to various industries requiring high-precision parts. Lifters are critical components that impact tool maintenance, repair, and injection molding. Keep your most valuable assets, your employees and materials safe by using DME lifting hardware. Design experience points for injection mold slider and lifter. It also provides stability and grip for the user. Virtual instructor led training offers the traditional live, instructor-led training you’re used to from the comfort of your own home (or office). 1. . The injection mold lifter design is an integral part of injection molding processing. Sprue Adjuster - SA. Injection molding lifters are mechanical components that are used to lift or move specific features of a molded part during the ejection process. Intermold® technology is a breakthrough patented one-step injection molding solution which allows the creation of hooks directly into plastic parts. . To get a price for export plastic injection mould there are a few things that you are going to provide to your mould supplier,. This is when the molten plastic has been poured into the mold and is ready to be removed. Propane powered with internal combustion engine and on-board PLC and equipment for remote starting of engine and transport. . Phone: +86-0769-82583659. A single cavity test mold for a 50-mm polypropylene closure was obtained and optimized to run at the lowest cycle time possible. Minimum Thickness/Draft. An A-side (cavity) and B-side (core) of a mold are represented with the ejector plate and pins placed on the B-side. The injection molding sliding mechanism features so many different parts. 00 - $200. During this course, the student will learn the principles of injection molding and how design a injection mold. The plastic part looks simple, but the side wall has many side holes and undercuts. At Creatingway, we widely use it in the manufacture of parts for commercial purposes. Rolling systems based on balls (most flexible movement), rollers (move the die in a linear direction), and bars (smooth movement) 3 operating technologies are available: Mechanical (for small and mid-sized dies and no power needed), Hydraulic ( heavier dies), and Pneumatic (for clean application and higher loading capacities)A core lifter system for a plastic injection mold, where one or more core blades is used to not only provide an undercut in the formed molded part, but also aid in ejecting the molded part from the mold. These features inhibit the direct removal of the core, and as a result, generally necessitate using an additional mold piece, such as a side-core or an internal core lifter, to form the shape. 0. spelling: injection molding) is a manufacturing process for producing parts by injecting molten material into a mould,. By gaining an in-depth understanding of the work principles and design points of lifter, you can better address the challenges in injection. Copyright reserved by: lifter in plastic injection mold is mainly used to form the internal undercuts of a molded plastic part. This video contains several injection mold delicate delay mechanisms for ejection and core pulling. Convenient logistics service, fast quotation, 24-hour online service. Min Order: 1 set. The finished products can then be used as is, or as a component of other products. One of our expert trainers will lead the course and encourage live participant interaction without the need to travel. The issues are never deliberate; they are due to various problems arising from the mold manufacturing process itself, the nature of the. For Our Paid O. Cold runner injection molding is a manufacturing process that involves injecting molten plastic into a mold to create a part or product. CNC Machining Service is suitable for engineering-grade plastic or metal parts and can be used to make from one single prototype up to hundreds parts. 001 to +0. They are a combination of slider, lifter, spring, and eje. The mold is split along the parting line to allow for the injection of molten plastic and the release of the finished part. Our carts increase safety and efficiency! 3550 E. 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. The premier global supplier of Mold Bases, Mold Components, Molding Supplies, Hot Runner & Controllers and Mold Technology with locations, operations, and strategic relationships in all corners of the globe, DME is determined to help our customers succeed in today’s ever changing economy. Key points of TPU mold design. As is typical, the plastic injection mold comprises a lower core plate 12 and an upper cavity plate 14 which separate along a parting line 16. Enhancing Injection Molding Efficiency with Injection Molding Lifters Injection molding lifters play a crucial role in the manufacturing process, ensuring smooth and efficient production of high-quality plastic parts. Lifter: The injection mold lifter is an essential component that makes the whole injection molding process successful. 1. The injection mold lifter is an essential component that makes the whole injection molding process successful. 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. Learn the injection mold parts and their machining process, get ready to optimize your production of high-quality molded parts. 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. Product ejection is the last step in the plastic injection molding process. spelling: injection molding) is a process for producing parts by injecting molten material into a mould, or mold. Decatur, IL 62521; Call Today 217-864-4125;. 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. Suitable for relatively simple undercut situations. . 2344 for plastic injection mold; if main insert use harden up steel,then lifter need azotizing process (718H、2316H) Below is a mold lifter animation from our relative company,their website Lifters and sliders are indispensable elements in the production of injection molded parts. In order to increase the efficiency of the production process, the plastic material is cooled by. We'll learn how to calculate angle and stroke in lifter. There are preferences and hindrances. There’s also a block-like locking mechanism. These slides play a pivotal role in enabling the production of complex parts with undercuts, threads, and intricate features. 002-0. It is. 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. This makes it an ideal choice for mass production of parts and products. However, when changing from the molten state to the gruel state, it not only has the fast. 2) Two angle pins will be required on any slide design that exceeds seven inches in. This typically also can be addressed in the press. For Our Paid Online and offline A. Accualign lifters unique Multi-Axis Technology compensates for thermal expansion and mold misalignment preventing binding and ultimately breakage. The CAD files and renderings posted to this website are created, uploaded and managed by third-party community members. 3 degrees is minimum for a shutoff (metal sliding on metal). Ideal for plastic injection producers and aluminium foundries. There are times when porous materials like Porcerax are used in problem or backfill areas. TheseThis video contains several injection mold delicate delay mechanisms for ejection and core pulling. Without lifters, the pins bring out the plastic product. 030- to 0. To help you navigate this process, here’s a step-by-step guide for designing an injection slide mold: 1. If there are surface defects such as gouges, nicks, scars, and dents in the mold cavity and sprue. In conclusion, high volume injection molding is a manufacturing process that involves the production of large quantities of plastic parts in a cost-effective and efficient manner. There is a cavity and a core lifter from the active position. 1. Similar to the slide, the lifter can be classified into: the integral lifter and the non-integral lifter (combined. Use Case. After a product solidifies in the mold, an effective method is needed to eject it from the mold. The engineer needs to consider the. Injection Mold Lifter Assembly | 3D CAD Model Library | GrabCAD. . Proper design helps ensure that good parts will be produced on the first run. . The ejector pins were not sufficient enough to eject the part out in a balanced way. Partially made into a spiral shape; 4. Collapsible cores are mechanisms that release a circular undercut feature in a method similar to a lifter. Brass inserts are small metal components that are used in plastic injection molding to create a wide variety of parts and products. TRADITIONAL MACHINES VENTS. 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. The first step in designing a lifter for injection molding is to analyze the part design. Injection Mold Slide And Lifter Design Guideline | Injection mold design. The significance of well-designed Injection Mold Lifter Design cannot be overstated in the realm of Injection Mold Lifter Design. MCB. Injection Mold Sprue is a critical component in the injection molding process, serving as the initial channel for the conveyance of molten material from the injection molding machine to the mold cavity. In a world where customers have…ROEMHELD Hilma is a worldwide market leader in quick die change systems and products. 14) The length of the slide foot must be 50% of the overall height of the slide. Disk gate – this gate is used to prevent eccentricity and weld when molding disk or cylinder-shaped products, however, there is a disadvantage in that the finishing of the gate part is difficult. Services: Their expertise lies in manufacturing complex, high-volume components with tight tolerances and advanced material options. We did a design breakdown on ways to create. Thus, plastics processing companies attempt to minimize costs, with the aim of increasing competitiveness. These specialized components help in the ejection and release of molded parts from the mold cavity, enabling manufacturers to. They are an essential part of the injection molding process, allowing manufacturers to create complex parts with undercuts, threads, and other intricate features. Plastic resin is fed into the loader in pellet form. 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. Design skills for connecting lifter:. Collapsible cores are mechanisms that release a circular undercut feature in a method similar to a lifter. Plastics injection molding is a sector that is becoming increasingly competitive due to the environmental issues it entails, pressuring consumers to reduce its use. (i. This pressure is transmitted to the mold manufacturers, as. 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. 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. These inserts are typically made from brass, a strong and durable metal that is resistant to corrosion and wear. A two plate mold and a three plate mold are different types of molds used in plastic injection molding, with the main difference being the number of plates used to form the mold cavity. Employees: 100~200. 003” to . 4) Provide a . Complete animation of 2 plate injection Mold design. S. An A-side (cavity) and B-side (core) of a mould are represented with the ejector plate and pins placed on the B-side. A lifter is a component that moves on an angle with the ejection to release an undercut on a part.