When autocomplete results are available use up and down arrows to review and enter to select. It sounds and looks a lot like a magic trick. The length and depth of the part feature dictates the number of segments required to release the. In stock and ready to ship. US1162961A US334515A US334515A US1162961A US 1162961 A US1162961 A US 1162961A US 334515 A US334515 A US 334515A US 334515 A US334515 A US 334515A US 1162961 A US1162961 A US 1162961A Authority US United States Prior art keywords shell slots. Product Parameters. The Dove Tail Collapsible Core offers an alternative design for molding and releasing undercuts. Add these bars to drawer cabinets without a lock and secure with a padlock. Hsp90 breaks this deadlock and restarts folding. Collapse per Side at Top of Core (C) 34. Nucleosome core particle: ribbon traces for the 146-bp DNA. introduces how we help customer to make mold parts for their water spigot mold need. Regardless of the method of production, GCI is specialized in developing and manufacturing pipe formwork. Some compelling arguments in favor of the ridge-push/slab-pull model are as follows: (a) plates that are attached to subducting slabs. Regardless of the method of production, GCI is specialized in developing and manufacturing pipe formwork. The clothesline extends up to 9. 2. COLLAPSIBLE CORE. This is so as not to hang the part up on one side of the core. Figure 4. A collapsible core for concrete pipe making machines that are used in the dry cast process when lined pipe are to be produced. The three units are a Collapsible Core, center pin, and a positive collapse sleeve. Fetures: 1. 8 – 1. 29 . Use Case. Download PDF Info Publication number US997027A. ) Expired - Lifetime Application number US625487A Inventor Harold A Denmire We claim: 1. For the function and lifetime of a high-speed in-jection mold,the correct choice of mate-rial is also important. Understanding the mechanism of. 135). Among the traditional approaches, collapsibility. 2, with the application demands, the initial structural design of the deployable structure is normally proposed first, followed by static and dynamic analysis to evaluate the design. In addition, double racks that use a single cylinder to control both racks can be installed to save space. Dec 5, 2019 - Collapsible Core Injection Molding molds from design, making, testing, producing, collapsible core mechanism, dovetail collapsible core, collapsibility of corecollapsible core collapsible core Prior art date 1927-05-31 Legal status (The legal status is an assumption and is not a legal conclusion. Best Squat Rack for Garage Gyms: REP PR-4100 Folding Squat Rack. The first sleeve includes a plurality of first ribs extending from a first base in an axial direction and defining a discontinuous first perimeter surrounding a channel. Unscrewing molds can be a bear to operate. Further studies are thus required to allow a complete understanding of the mechanisms of periplasmic protein folding. One is mantle convection. Send your love by sharing the adorable images in the included gallery! DME COLLAPSIBLE CORE – YouTube. An extended stripper plate has been incorporated for proper ejection and cylinders are shown installed for the last stage of the required 2-stage ejection. A. 0 mm at aThe collapsible core mechanism re-quires absolute precision during grinding of the fits, guides and movement seats if the goals of extremely fast cycles and high mold lifetime are to be achieved. The Collapsible Core DT Series provides a more compact and simplified solution to molding challenging internal undercut features such as o-ring grooves, slots and snap-fit designs. English. Read More US997027A - Collapsible core. The UPR orchestates the enforcement of adaptive mechanisms to maintain an optimal rate of protein production and rapidly reacts to diverse stimuli, including extracellular responses to hormones. Shop. , 2004; Connell. The folding of wild-type YibK has been studied previously and the protein displays complex urea concentration. When using collapsible cores, one must ensure that the thread depth and the thread diameter are corre-lated. The Collapsible Core is a major breakthrough for molding plastic parts requiring internal threads, undercuts, protrusions. Buenisimo! SectionHiker is reader-supported. We compare the folding of representative members of a protein superfamily by experiment and simulation to investigate common features in folding mechanisms. Padlockable Locking Bars for Drawer Cabinets. 00. Nonlinear and rich dynamic behaviours of the collapsible system are discovered. The Foldylock Classic gives you more locking space than a standard size u-lock. The collapsible core offers some unique advantages to the traditional rotating core. Collapsible core for concrete construction Download PDF Info. Delivery country. et al. The mechanism of collapsible core can help efficiently on many plastic parts which requires internal threads, undercuts, protrusions or cut-outs. The basic core. January 25th, 2021. 04 74 73 00 33 – Fax 04 74 73 61 11. 4 is sinilar to Fig. Medical equipment 5. Our experts will guide you through the design process from conception to completion and offer specific solutions for various applications. Use these telescoping poles with tarps, drop cloths, and plastic sheeting up to 8 mils thick to create a sturdy, temporary wall and control dust and debris. US1602132A - Collapsible core and chuck - Google Patents Collapsible core and chuck Download PDF Info Publication number US1602132A. Open navigation menu Collapsible core molding The mechanism of collapsible core can help efficiently on many plastic parts which requires internal threads, undercuts, protrusions or cut-outs. COLLAPSIBLE CORE. suggesting that common mechanisms exist by. A new model is presented to describe flow in segments of collapsible tube mounted between two rigid tubes and surrounded by a pressurized container. JOHNSON, or AKRON, onIo GOLLAPSIBLE cons Application filed January 11, 1930. A collapsible core design can help mold parts with undercut details at one-third the cost of an unscrewing mold and half the cycle time. Jacking Pipe . #About collapsible core: The amazing collapsible core design can realize the stability and sh. . The core comprises three relatively movable assemblies. The side chain of Trp421 points into hydrophobic/aromatic core of the enzyme and accepts a hydrogen bond from the nearby γ-oxygen of Tyr280. Vehicle products 3. The term origami refers to the commonly known ancient art of paper folding. The New DME Collapsible S-Core is a dynamic design that can be produced in 6, 8 or 12 segments enabling parts to be produced as small as 6mm and as large as 400mm. The bars are shown with a red arrow and a blue arrow and they move in opposite directions as the linkage. A collapsible core mechanism enables smooth removal of the product from the mold in case of a wet cast process. Based on the analysis, we identified different routes. One result of urbanization in arid. For Our Paid Online and offline Training and Industrial Design ServicesContact +91 848. The mold base andTraditional core-pulling mechanism cannot achieve undercut retracting of inside and outside area due to the limited dimension and shape. Collapsible Core. Find high quality Collapsible Core Suppliers on Alibaba. US1242092A - Collapsible core for concrete-molds. Thus, if all rods are “nonredundant” (a common situation), a linkage has 2 j — r degrees of freedom. 4 is a sectional view taken on the line 4--4 of FIG. Upmold is an integrated Injection molding molds manufacturer with design, production and sales. Touch device users, explore by touch. Each core will be designed individually and according to the article. Best Over-the-Sink Colander: Qimh Collapsible Over the Sink Colander. MiniCores® utilize unique technology for molding plastic parts with threads or details normally requiring complex unscrewing or side action mechanisms. 32 . Therefore, in the endoplasmic reticulum, an enormous investment of resources, including chaperones and protein folding facilitators, is dedicated to adequate protein maturation and delivery to final destinations. This mechanism can be hydraulic, mechanical, pneumatic, or a combination. See collapsible core structure on page 8Molecular dynamics (MD) simulations allow us to examine folding mechanisms in atomistic detail (), particularly now that simulation techniques have advanced to sample the millisecond time scale (38–41). We are committed to becoming the leader in this industry, insisting on selling Plastic Collapsible Core Injection Pipe Fitting Mould at the most competitive prices, providing customers with diversified services, and striving to fully meet customer requirements. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. 32 . The first sleeve includes a plurality of first ribs extending from a first base in an axial direction and defining a discontinuous first perimeter surrounding a channel. #About collapsible core: The amazing collapsible core design can realize the stability and sh. Collapsible Core Injection Molding molds from design, making, testing, producing, collapsible core mechanism, dovetail collapsible core, collapsibility of core ahmedsami92 AA collapsible mold core having plural can actuated members surrounding a conical central core member, the members surrounding the central core member having slidable pins connecting adjacent members and molding apparatus including the core. There are 370 OEM, 331 ODM, 295 Self Patent. 99 $ 105. Pinterest. As tension is reduced even further, the membrane is sucked underneath the downstream rigid wall and, although this causes the numerical scheme to break down, it in fact agrees with another. The plastic mold adopts a collapsible core pulling mechanism. Volume Discount is available ; CAD Available in 2D and 3D Recoiler mechanism including a core plate having a main body and complementary peripheral portions integral with the body and forming with the body, a surface about which material may be coiled, the portions terminating in adjacent free ends, and provisions intermediate the free ends to effect initial expansion and subsequent collapsing of at least part of the portions to enable removal of the. The results. Dove Tail Cores. core section sections collapsible plate Prior art date 1924-09-02 Legal status (The legal status is an assumption and is not a legal conclusion. Volcanism, metamorphism, earthquakes, crustal warping, folding, and faulting are the major types of endogenic processes. 32 . The patented design incorporates only three moving parts, which utilize conventional mold movements. Our solution to demould undercuts and threads are time and cost saving collapsible cores. 4, H and I) (14, 15, 21, 49). The term hinge line has also been used for this feature. Collapsible core actions are useful for releasing circular undercuts. 9K views 1 year. In some aspects the core device includes a rotatable shaft, moveable outer wall components positioned radially from the shaft, a first disk operatively. Collapsible Cores – Application. 3 is a sectional view taken on the line 3--3 of FIG. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. In order to enhance. The core comprises a pair of identical upper and lower members which are L-shaped in cross section and two corner members. US839818A US31733406A US1906317334A US839818A US 839818 A US839818 A US 839818A US 31733406 A US31733406 A US 31733406A US 1906317334 A US1906317334 A US 1906317334A US 839818 A US839818 A US 839818A Authority. The geomorphic process refers to altering the configuration of the Earth's surface as a result of physical forces and chemical reactions on the planet's materials. et al. COLLAPSIBLE CORE. Linkage mechanisms consist of a series of mechanical linkages that can change direction, alter force and make things move in a certain way. com. Their fundamental findings reveal mechanisms that operate in normal physiologic. txt) or view presentation slides online. This is the three head collapsible core for electronic industry. Undercuts are protrusions or recessions in a part that prevent the mold, after thecollapsible core mould design for plastic mold: Item no: DDT: Application Fields: 1. Here, we probe the folding mechanism of YibK, a homodimeric α/β-knot protein containing a deep trefoil knot at its carboxy terminus. 0. US1491681A US580465A US58046522A US1491681A US 1491681 A US1491681 A US 1491681A US 580465 A US580465 A US 580465A US 58046522 A US58046522 A US 58046522A US 1491681 A US1491681 A US 1491681A Authority US United States Prior art keywords sections core levers chuck plate movement Prior art date 1922-08-08 Legal. We only make money if you purchase a product through our affiliate links. bbabio. grabcad. 00. Molded Length (Including Mold Shut-Off) c Collapse per Side at Top of Core** (Range Shown) l Length of Collapsible Core Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm CC-125-PC. Results show that the. tubular well articles, comprising an annular shell (1) which substantially forms a pipe having a longitudinal axis extending between the ends of the pipe, said shell (1) being flexurally flexible about the longitudinal axis of the pipe. Catalog language: EN. txt) or view presentation slides online. The structure is more simple than. For multi-core molds, a single rack can activate multiple pinions for multi-core control. Made of seven steel wires braided to create one sturdy, non-sagging clothesline, this clothesline is durable. Whether you’re looking for movable glass walls that offer superior sound dampening, large glass panels that provide a wide line-of-sight without seams, or easily-movable partitions, Hufcor has a solution. Upmold is an integrated Injection molding molds manufacturer with design, production and sales. Full technical details, including basic stripper plate mold construction, core grinding instructions, and core and mold machining dimensions are included in the Collapsible Core and Collapsible Mini-Core Design & AssemblyOne area of current interest is membrane protein folding (4–6). Today. 7)–9) The 19S RP. Mechanisms, Causes, Management: BACKGROUND: Orthostatic intolerance refers to the development of symptoms such as lightheadedness and : blurred vision when a subject. It is ideal for features with circular undercuts or large internal threads. 1 / 23. For parts with larger diameters, such as uPVC pipe fittings, the collapsible core must be custom designed, often by tedious trial and error. Two stages movement with Hasco 2-stage ejection system. 4. Gasbarro, having built several collapsible core molds in the past using both RT Series and Dovetail style (DT) cores from collapsible core manufacturer Roehr Tool (Hudson, MA), approached his customer with the thought of replacing the. Kind Code:. 1S Stowable Bench is 40% off at Amazon. Most folding exercise bikes are fairly lightweight. 1;Collapsible core technology is a method for removing internal undercuts in parts, and is used primarily in caps and closures, plumbing components, and the medical industry. Fitness Reality SuperMax XL Weight Bench is 35% off at Amazon. To this end we designed a. Fitness Reality 1000 Super Max Weight Bench is 35% off at Amazon. In the copending application just referred to there is shown and claimed a new spool structure comprised ofThe grasping mechanism is a core component of the manipulator and directly interacts with the target object. Collapsible core Download PDF Info Publication number US1666689A. 2 is a bottom view of the core of FIG. 000X5. potential folding core members, from hydrogen-exchange experiments [17,78]. Based on extensive simulations, we first characterise the chaotic behaviours of the collapsible channel flow and explore possible routes to chaos. This video shows off the different collapsible core designs. A fold surface seen perpendicular to its shortening direction can be divided into hinge and limb portions; the limbs are the flanks of the fold,. #10 Collapsible Core Mechanism 2 The angle pin drives the slider to pull out the inner core, and the outer core first shrinks inward, and then the whole is withdrawn from the product. ATTORNEYS Patented Apr. A greaterdraft is desirable when “B” is near “B max” (ex. Let a linkage have j free joints and r rods (or links). I partook in a personal project of redesigning the medicine bottle cap and its plastic injection mold. When the expansion member is fitted within the first and second sleeves, the expansion member and the first and second sleeves form a substantially continuous,. The recent publications by Shaw and coworkers (40–44) of atomistic folding trajectories for more than 10 relatively small. A multi-sectioned core is provided that is easily assembled. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. The demoulding speed is faster than old method, it can raise the production efficiency greatly. Interlocking sections that provide a pivot are held together by a sliding pin inserted therein. US2789779A - Expansible and collapsible-core spool mechanism - Google Patents Expansible and collapsible-core spool mechanism Download PDF Info Publication number. 2 HemeThere are three very distinct features separating the wing-folding mechanism of Dermaptera from the assumptions of rigid origami. √ First eject and then release the elasticity from the bottom, standardizing the problem of inverted ejection of small. Choose from our selection of tool box locks, including miniature circular-keyway cam locks, keyed cam locks, and more. Dehydration upon folding can be characterized directly by all-atom simulations of fast pressure drops, which create desolvated pockets inside the nascent hydrophobic core. 037. The representation of the client is schematic (yellow, core-forming segments; red, noncore segments). 485 12. Pins lock in place until you push the button to release the spring-loaded retaining balls. First, the mold is prepared. MISUMI • Product Type: Slim type • Guide Rail Type: Combined type • Includes Retracting Mechanism • Dimension ST (Stroke amount) (mm): 6 • W Dimension (Angular cam width) (mm): 20. Armoloy has the coating solutions to make your corrosion issues a distant memory. Although an increase in intracellular [Ca 2+] is the primary insulin secretary signal, cAMP signaling-dependent mechanisms are also critical in the regulation of insulin secretion. The Collapsible Core’s automatic operation makes it possible for you to produce parts that, previously, had beenElucidation of the mechanisms of protein folding and function remains an outstanding challenge in biophysics. As the premier operable partition, movable glass wall and airwall company in the industry, we offer the latest in design and engineering. The Collapsible Core is a major breakthrough for molding plastic parts requiring internal threads, undercuts, protrusions or cut-outs. Then, use JavaScript to slide down the content by setting a calculated max-height, depending on the panel's height on different screen sizes: Example. The hydrophobic binding motifs within the core of the folding intermediate. Our testers, who ranged in exercise experience from beginner to advanced,. Our collapsible core molds can significantly speed up your production when it comes to projects requiring the injection of plastic parts with undercuts otherwise impossible to. View all. 8 mm from the top of the pin. In geology, a deformation mechanism is a process occurring at a microscopic scale that is responsible for changes in a material's internal structure, shape and volume. Conventional unscrewing molds are hydraulically driven, and the number and size of the threads on the part dictate the. Uploaded: March 12th, 2021. Show more. Due to the modular. Collapsible Core is majorly used for internal. This paper presents models for a tension-based, multi-stable, large displacement, compliant rolling-contact element (CORE). The door is a moving mechanism which is more like a barrier made of wood, stone, metal, glass, paper, leaves, hides, or a combination of materials. Back. Collapsible Core Bottle Cap Mold Design. Producing plastics parts with undercuts presents distinct challenges for molders. collapsible collapsible core Prior art date 1919-05-01 Legal status (The legal status is an assumption and is not a legal conclusion. 605 142. Dry cast molds come with a carefully estimated number of external and/or internal vibrators. The patented design incorporates only three. There are two types of collapsing cores: mechanical and flexing steel. Digital & Communication product. The misfolding and aggregation into amyloid fibrils of the prion protein (PrP) have been strongly linked with a group of neurodegenerative disorders that include the mad cow disease. 2. Understanding Mold Side Action: A Practical GuideOur representative mixed α/β protein is chymotrypsin inhibitor 2 (CI2). Winding mechanism CA267493A (en)Collapsible core for plastic building-walls. When autocomplete results are available use up and down arrows to review and enter to select. Int. In its active, phosphorylated state, Myo-II oligomerizes into a bipolar mini-filament that can bind to multiple actin filaments and ‘walk’ along them in an ATP-dependent manner (Figure 1 C) 20, 21, 22. For the function and lifetime of a high-speed in-jection mold,the correct choice of mate-rial is also important. F. 116, 19717. Internal threads and non-perpendicular external threads require an external unscrewing mechanism. Application filed November 5, 1924, serial No. The elucidation of the folding mechanism of a protein is an insoluble problem, because it requires the complete description of the nascent (unfolded) and final (native) states, together with all intermediates along the U → N transition. A collapsible mould core having a central longitudinal axis and an outer cup-like shaping surface, the core comprising an inner and an outer set of interdigitated segments (116, 216) which together define a continuous annulus and a tapering centre (14) disposed within said annulus to complete the end portion of the shaping surface of the. Touch device users, explore by touch. This test procedure showed the same failure mechanisms as in the folded cores. 100+ bought in past month. This article will explain the concepts of the. Collapsible Core. The plastic mold adopts a collapsible core pulling. Download PDF Info Publication number US1242092A. Instead of expensive pinion and rock . Aug 3, 2020 - Collapsible Core Injection Molding molds from design, making, testing, producing, collapsible core mechanism, dovetail collapsible core, collapsibility of core Mini Slide Core Units - Slide Stroke Amount 6mm, Slim, Equipped with Slide Core Retracting Mechanism. It. We then explore the physical mechanisms responsible for the onset of self-excited oscillations. 5 shows that it serves as an anchor for many interactions between RET in the TM domain and the tertiary structure in the EC. 32 . Advantage: 1. My wife rocking the REI Co-op Traverse Power Lock Cork women’s trekking poles in Grand Canyon National Park. Vehicle products 3. The view shows the core in expanded position. A collapsible core device for molding articles around the core device in a mold cavity includes a first sleeve, a second sleeve and an expansion member. Watch. The simple and robust release mechanism enables an easy folding, handling and a stable stand. View Files. the need for complex unscrewing mechanisms as well as providing solutions for unmoldable Available in four standard sizes and also as customs, DT Series Collapsible Cores eliminate over other tool designs. 30,31 At an LPR of. 3. Download PDF Info Publication number US997027A. Animated Collapsible (Slide Down) To make an animated collapsible, add max-height: 0, overflow: hidden and a transition for the max-height property, to the panel class. 04. Download PDF Info Publication number US530108A. Collapsible core design, dovetail Collapsible core design, Collapsible core mechanisms, 3D models Upmold 2. √ Occupies small mold space, simple and convenient installation, suitable for barb mechanism. Here are the steps you need to follow in order to fold / unfold a stroller (some strollers may have a slightly different mechanism). The second sleeve includes a. Hum. 2. )A collapsible core for casting e. At present, the receptor for nucleophagy. 5(a) , a finger cam is used to move the segment inward when the lower block is pulled downward, while in Fig. The second type of collapsible core is more mechanical in nature and is called the dove tail collapsible core. Folding and bonding the skin onto the internal structure, considering the critical folding radius of thin composites and the use of developable surfaces. D-M-E COLLAPSIBLE CORE 3 D-M-E Collapsible Core: Description of Components and Basic Operation The D-M-E Collapsible Core is a three-unit assembly designed for simplicity of installation, reliability in operation and long life. For “R min” and “R max” see Collapsible Core dimension drawing. Our main products are Plastic Injection mold, Die casting mol. As the. 2. Hydrogen exchange studies have determined that the native folding core consisting of the A, G, and H helices is formed early in the folding process . Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. ; Efficiently mold plastic parts requiring internal. US1666689A US744045A US74404524A US1666689A US 1666689 A US1666689 A US 1666689A US 744045 A US744045 A US 744045A US 74404524 A US74404524 A US 74404524A US 1666689 A US1666689 A US 1666689A Authority US United StatesAbstract. 2. 4 Collapsible Cores Collapsible cores are used when, besides threads, other undercuts must be released. Collapsible core injection molding PartParts with internal protrusions, dimples, uninterrupted threads and cut-outs can now be economically produced on a high- or low-volume basis. COLLAPSIBLE CORE. A key regulator of differential gene expression programs are the enhancers, the gene-distal cis-regulatory sequences that govern spatiotemporal and quantitative expression dynamics of target. The action is inserted into the mold before injection, then unscrewed from the part after the material has set. Spin the handle up or down, then tighten the locknut to change the length by up to ½”. Don't bog yourself down with traditional folding legs that only work for limited. Advanced Solution to Molding Threads & Undercuts. cLD exhibits a unique protein fold and is sufficient to control Ire1 activation by unfolded proteins. It sounds and looks a lot like a magic trick. . The core comprises three relatively movable assemblies (10, 110 and 120). ) Expired - Lifetime Application number EP96934445AThe trimerization core is located in the N-terminal part. Best Mesh Strainer: Cuisinart Mesh Strainers. For special requirements please contactD-M-E. 747,911. 2 Models for plate motion mechanisms (Steven Earle, “Physical Geology”). Read More. R. The main obstacle in reaching this goal is the elusive nature of the folding protein. Collapsible core design, collapsilbe core mechanism, collapsible core manufacturing, collaspbile core injection molding, unscrewing molding. A collapsible core device for molding articles around the core device in a mold cavity includes an expansion member, a discontinuous first sleeve and a discontinuous second sleeve. A collapsible core comprising a pair of side members of generally L-shape in cross section, a pair of diagonally opposite corner members disposed adjacent edge portions of said side members, cam followers on said corner members, a pair of longitudinal actuating strips having cam plates operative on the cam followers of said corner members,. The two lightest bikes on our list are XTERRA Fitness’ FB150 Folding Exercise Bike and Xspec’s Foldable Stationary Upright Bike, which weigh 32 and 33 pounds, respectively. It also includes some exercises and examples of folding in different geological settings. Int. ) Expired - Lifetime Application number US293901A InventorFigure 1: Schematic illustration of the mechanism of collapse settlement. This model is called Collapsible Core which is used in molding technology. Structure, folding dynamics, and. Collapsible Core is majorly used for internal threading in mold parts. Type of Side Action. During. 99. 020 per inch of part height requiring collapse. Aluminum. In Fig. 8. collapsible arms core surfaces Prior art date 1924-09-06 Legal status (The legal status is an assumption and is not a legal conclusion. J. ) Expired - Lifetime Application number US747912A Inventor Otto J KuhlkeCollapsible Core is a mechanism that works by allowing the internal sections of a mold to collapse inwards, enabling easy removal of undercut features or complex shapes from the mold cavity. 720 18. Press the brake lever of the baby stroller. Collapsible core design, collapsilbe core mechanism, collapsible core manufacturing, collaspbile core injection molding, unscrewing molding. Title: In 201. - Google Patents Collapsible core for concrete-molds. ) Expired - Lifetime Application number US735285A Inventor Otto J Kuhlke core shaft collapsible section Prior art date 1925-06-10 Legal status (The legal status is an assumption and is not a legal conclusion. House appliance 4. B-Side Expandable Cavities are anchored into the ejector. Natural and anthropogenic (engineered and non-engineered) collapsible soils exist in many regions of the world. Reusable collapsible core . The first core pulling principle is driven by an inclined T-slot. g. A collapsible core and molding apparatus and method for molding a plastic article having an undercut and a non-undercut portion. Pinterest. the need for complex unscrewing mechanisms as well as providing solutions for unmoldable internal undercut features such as o-ring grooves, slots, and snap fit details.