Slider internal core pulling mechanism and its mold

Abstract

This utility model belongs to the field of injection mold technology, and particularly relates to a slider internal core-pulling mechanism and its mold. A slider internal core-pulling mechanism, applied to a mold with a secondary mold-opening function, is used for demolding the internal undercut structure of a plastic part. It includes: a slider, horizontally housed within a second template of the mold, the slider having a first end face for forming the undercut of the plastic part; and a spade base, vertically housed within the second template of the mold, the bottom of the spade base being fixedly mounted on a support plate of the mold, and the top of the spade base being connected to the slider via a guide fitting structure; wherein, the guide fitting structure is used to convert the floating displacement of the second template into the horizontal core-pulling movement of the slider.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and in particular relates to a slider internal core pulling mechanism and its mold. Background Technology

[0002] In modern industrial manufacturing, especially in fields such as automotive interior parts and precision electronic product housings, the structure of plastic parts is becoming increasingly complex. Their inner and outer surfaces are often designed with undercut structures such as snap-fits, reinforcing ribs, and deep cavity grooves. These undercut structures prevent the plastic parts from being directly ejected from the mold cavity after injection molding. Instead, they must rely on core-pulling mechanisms, such as sliders and angled ejectors, set inside the mold to remove the mold components that form the undercuts before the final demolding action can be completed.

[0003] For plastic parts with particularly complex structures, conventional single mold opening and ejection actions often fail to meet their demolding requirements, necessitating more complex secondary (or multiple) mold opening techniques. These techniques typically involve the B-plate (second mold plate) of the mold, after opening at the main parting surface, undergoing a pre-defined "floating" displacement relative to its support plate. Under this complex mold opening sequence, providing a stable and reliable driving force to the slider mechanism located inside the B-plate for handling internal undercuts becomes a challenge in mold design. Existing technologies usually employ an external, independent power source, such as a dedicated hydraulic or pneumatic cylinder for the slider. However, this approach significantly increases mold manufacturing costs and structural complexity, enlarges the overall mold size, and requires an additional control system to ensure precise synchronization between the external power source and the main mold opening action, undoubtedly reducing production stability and efficiency.

[0004] Therefore, those skilled in the art urgently need to solve a technical problem: how to design a more ingenious and lower-cost internal core-pulling mechanism that can directly utilize the floating displacement of the B-plate itself during the secondary mold opening process as a power source to drive the slider to complete a precise lateral core-pulling action. Achieving this goal would effectively avoid the use of expensive and complex independent drive systems, thereby simplifying the overall structure of the mold, reducing its footprint, and fundamentally improving the reliability and automation level of the complex plastic parts production process. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a slider internal core pulling mechanism and its mold.

[0006] Firstly, a core-pulling mechanism within a slider adopts the following technical solution:

[0007] A slider-type core-pulling mechanism, applied to a mold with a secondary mold-opening function, is used for demolding the internal undercut structure of a plastic part, comprising:

[0008] A slider is horizontally housed within the second template of the mold, and the slider is provided with a first end face for forming the undercut of the plastic part;

[0009] The shovel base is vertically housed within the second template of the mold. The bottom of the shovel base is fixedly mounted on the support plate of the mold, and the top of the shovel base is connected to the slider through a guide fitting structure.

[0010] The guide and mating structure is used to convert the floating displacement of the second template into the lateral core-pulling motion of the slider.

[0011] Furthermore, the guiding and mating structure includes:

[0012] T-shaped blocks, fixed to the top of the shovel base; and

[0013] A T-slot is formed at one end of the slider and slides with the T-block.

[0014] When the second template generates a floating displacement, the slider and the shovel base move relative to each other. Through the inclined guiding effect of the T-block and the T-slot, the movement is converted into the lateral inner core-pulling displacement of the slider.

[0015] Furthermore, wear-resistant plates are also provided on the sliding contact surfaces of the slider and the shovel base with the second template.

[0016] Furthermore, a mounting base is fixedly connected to the bottom of the shovel base, and the mounting base is fixed to the support plate of the mold.

[0017] Furthermore, the slider has a cooling water channel inside, which is connected to an external cooling system through an extended water pipe to control the temperature of the undercut end face of the slider.

[0018] Secondly, a mold with a secondary mold-opening function adopts the following technical solution:

[0019] A mold with a secondary mold opening function, the mold including the above-mentioned slider inner core pulling mechanism.

[0020] Furthermore, the mold also includes:

[0021] A first template and a second template, the first template and the second template cooperate to define a mold cavity for molding plastic parts, and can be opened and closed along the first parting surface;

[0022] A tray, configured to open and close twice along the second parting surface with the second template; and

[0023] An ejector plate mechanism is housed within the support plate; the ejector plate mechanism includes an ejector base plate and an ejector panel, the ejector panel being configured to move independently relative to the ejector base plate after the second template has completed its floating displacement;

[0024] The slider is horizontally housed within the second template, the shovel base is vertically housed within the second template of the mold, the bottom of the shovel base is fixedly mounted on the support plate, and the floating displacement of the second template and the support plate along the second parting surface is used to drive the slider to pull the core horizontally.

[0025] Furthermore, the mold also includes:

[0026] A hydraulic cylinder configured to drive the ejector plate mechanism to move relative to the support plate; the hydraulic cylinder includes a cylinder body and a telescopic rod, the cylinder body being fixedly connected to the support plate, and the telescopic rod being fixedly connected to the ejector plate mechanism, and is configured to drive the ejector plate mechanism to move in a vertical direction; and

[0027] The fastening mechanism includes a base, a fastener, and a fastener key. The base is mounted on the ejector pin base plate, the fastener is mounted on the support plate, and the fastener key is mounted on the second template. The fastener has a groove, and the fastener key is configured to selectively engage and lock with the groove. After the second template completes the floating displacement relative to the support plate, the fastener key engages and locks with the groove of the fastener to limit further movement of the second template.

[0028] Furthermore, the mold also includes a tilting ejector mechanism, the tilting ejector mechanism comprising:

[0029] A straight push rod, which is connected to the ejector plate in a transmission manner;

[0030] An inclined push rod has its axis forming a preset angle with the straight push rod; the top end of the inclined push rod is connected to an inclined push block for forming the internal inverted structure, and the inclined push block is also provided with a second end face that abuts against the slider;

[0031] The guide sleeve has a straight guide hole and an oblique guide hole that are interconnected, which are used to slide and guide the straight push rod and the oblique push rod respectively; the guide sleeve is installed and fixed in the second template of the mold by fasteners;

[0032] The transmission engagement structure includes helical teeth integrally formed on the straight push rod and helical groove integrally formed on the inclined push rod, and is constrained by the guide sleeve to convert the vertical linear movement of the straight push rod into the oblique movement of the inclined push rod along its own axis.

[0033] Furthermore, the driving force of the inner core-pulling mechanism of the slider comes from the floating process of the second template relative to the tray to realize the inner core-pulling movement in the first stage; after the core-pulling in the first stage is completed, the inclined ejector mechanism performs the demolding movement of the plastic part in the second stage.

[0034] The beneficial effects of this utility model are:

[0035] The slider-in-core-pulling mechanism provided by this utility model utilizes the floating displacement of the second template itself during the secondary mold opening process as the sole power source for driving the slider. By fixing the shovel base to a stationary support plate and housing the slider within the floating second template, the vertical floating of the second template can be converted into the lateral core-pulling movement of the slider relative to the second template through a guiding and cooperating structure. This completely eliminates the need for expensive and complex external drive systems such as independent hydraulic cylinders or pneumatic cylinders for the slider, thereby simplifying the overall structure of the mold and reducing manufacturing costs and maintenance difficulty. Attached Figure Description

[0036] Figure 1 This is the front view of the core-pulling mechanism inside the slider.

[0037] Figure 2 This is a top view of the core-pulling mechanism inside the slider.

[0038] Figure 3 This is an isometric drawing of the core-pulling mechanism inside the slider.

[0039] Figure 4 This is the main view of the slider.

[0040] Figure 5 This is a top view of the slider.

[0041] Figure 6 Isometric drawing of the slider.

[0042] Figure 7 This is the main view of the shovel base.

[0043] Figure 8 This is a side view of the shovel base.

[0044] Figure 9 This is an isometric drawing of the shovel base.

[0045] Figure 10 This is an isometric drawing of the mold.

[0046] Figure 11 This is the main view of the mold.

[0047] Figure 12 This is a side view of the mold.

[0048] Figure 13 This is an isometric schematic diagram showing the positional relationships of the various mechanisms in the mold.

[0049] Figure 14 This is a front view schematic diagram showing the positional relationship of the various mechanisms in the mold.

[0050] Figure 15 This is the front view of the inclined top mechanism.

[0051] Figure 16 This is a side view of the inclined top mechanism.

[0052] Figure 17 Isometric drawing of the inclined jack mechanism.

[0053] Figure 18 This is a schematic diagram of a straight push rod structure.

[0054] Figure 19 This is a schematic diagram of the inclined top rod structure.

[0055] Figure 20 This is a schematic diagram of the guide sleeve structure.

[0056] Reference numerals: 100, Core-pulling mechanism inside the slider; 200, Mold; 300, Plastic part; 110, Slider; 111, First end face; 112, Cooling water channel; 120, Shovel base; 121, Mounting base; 130, Guide mating structure; 131, T-block; 132, T-slot; 140, Wear-resistant sheet;

[0057] 210. Second template; 211. First parting surface; 220. Support plate; 221. Second parting surface; 230. Ejector plate mechanism; 231. Ejector base plate; 232. Ejector panel; 240. Hydraulic cylinder; 241. Cylinder body; 242. Telescopic rod; 250. Fastener; 251. Base; 252. Fastener; 2521. Groove; 253. Key; 260. Inclined ejector mechanism; 261. Straight ejector rod; 262. Inclined ejector rod; 263. Guide sleeve; 2631. Straight guide hole; 2632. Inclined guide hole; 2633. Screw hole; 2634. Fastener; 264. Transmission and engagement structure; 2641. Helical tooth; 2642. Inclined groove; 265. Inclined ejector block; 2651. Second end face; 270. Base plate. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this utility model clearer, the present application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0059] In the following description, references to "some embodiments" refer to a subset of all possible embodiments; however, it is understood that "some embodiments" may be the same or different subsets of all possible embodiments and may be combined with each other without conflict. Unless otherwise defined, all technical and scientific terms used in the embodiments of this utility model have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this utility model belong. The terminology used in the embodiments of this utility model is for the purpose of describing the embodiments of this utility model only and is not intended to limit the utility model.

[0060] Those skilled in the art should understand that, in the following description of the embodiments of this utility model, the sequence of numbers does not imply the order of execution. Some or all steps may be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this utility model.

[0061] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The singular forms "a" and "the" as used in the embodiments of this utility model and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0062] This embodiment provides a core-pulling mechanism 100 inside a slider, such as... Figures 1 to 9 As shown. The slider internal extraction mechanism 100 is applied in the mold 200 with secondary mold opening function to demold the internal undercut structure of the complex plastic part 300.

[0063] Reference Figures 1 to 3 The components of the core-pulling mechanism 100 inside the slider include a slider 110, a shovel base 120, and a guide mating structure 130 disposed between the two.

[0064] Slider 110 (e.g.) Figure 4-6 The part shown is configured to be laterally slidably housed within the second template 210 of the mold. Its front end face 111 is the first end face 111 for molding the internal undercut structure of the plastic part 300.

[0065] 120 shovel base (e.g.) Figure 7-9 The shovel base 120 (as shown) is configured to be vertically housed within the second template 210 of the mold. The bottom of the shovel base 120 is fixedly mounted on the support plate 220 of the mold 200 via its mounting base 121, so the shovel base 120 is relatively stationary during mold opening. The top of the shovel base 120 is kinematically engaged with the slider 110 via the guide engagement structure 130.

[0066] The working principle of the slider core-pulling mechanism 100 provided in this embodiment is as follows: When the mold 200 performs a second mold opening, the second template 210 will have a floating displacement relative to the support plate 220. Since the slider 110 is housed within the second template 210, it floats along with the second template 210. At this time, the shovel base 120 remains stationary, thus generating a relative vertical movement between the slider 110 and the shovel base 120. The function of the guide mating structure 130 is to convert this relative vertical movement into a lateral core-pulling movement of the slider 110 relative to the second template 210, thereby completing the demolding of the undercut.

[0067] In some specific embodiments, reference is made to Figures 1 to 3 In this embodiment, the guiding and mating structure 130 consists of a T-block 131 and a T-slot 132. The T-block 131 is fixed to the top of the shovel base 120. The T-slot 132 is formed at one end of the slider 110 and slides with the T-block 131. When the second template 210 drives the slider 110 to float upward, the slider 110 moves relative to the shovel base 120. During this process, the fixed T-block 131 slides within the moving T-slot 132. The inclined guiding effect of the T-block 131 and the T-slot 132 forcibly converts the vertical motion component of the slider 110 into a horizontal motion component, thereby driving the slider 110 to complete the inner core-pulling displacement.

[0068] In some specific embodiments, reference is made to Figure 1 , Figure 3 To ensure the stability and service life of the core-pulling mechanism 100 within the slider under high load and high frequency operation, replaceable wear-resistant plates 140 are provided on the sliding contact surfaces of the slider 110, the shovel base 120, and the second template 210. The wear-resistant plates 140 provide a low-friction sliding interface for the lateral sliding of the slider 110 and the vertical positioning of the shovel base 120, effectively preventing direct wear of the core components.

[0069] In some specific embodiments, reference is made to Figures 7 to 9 The bottom of the shovel base 120 is integrally formed or fixedly connected to a mounting base 121. The mounting base 121 is provided with positioning holes and bolt holes for fixing the shovel base 120 onto the support plate 220 of the mold 200 by means of positioning pins and bolts.

[0070] In some specific embodiments, reference is made to Figure 4 and Figure 6 To cope with the high-temperature injection molding environment, the slider 110 is equipped with a cooling water channel 112. This cooling water channel is connected to the external cooling circulation system of the mold through an extended water pipe. The coolant circulates in the water channel, which can continuously control the temperature of the slider 110, especially its first end face 111 of the molding undercut, thus ensuring the molding quality and production efficiency of the plastic parts.

[0071] This embodiment provides a mold 200 with a secondary mold opening function, such as... Figures 10 to 14 As shown. The mold 200 integrates any of the slider internal core-pulling mechanisms 100 described in the above embodiments.

[0072] In some specific embodiments, the mold 200 includes a first template (not shown) and a second template 210 disposed on a base plate 270. The first template and the second template 210 cooperate to define a mold cavity for molding a plastic part and can open and close along a first parting surface 211. The mold 200 also includes a support plate 220. The second template 210 can open and close with the support plate 220 along a second parting surface 221 to generate floating displacement. The ejector plate mechanism 230 of the mold 200 is housed in the support plate 220 and consists of an ejector base plate 231 and an ejector panel 232. The ejector panel 232 can continue to move independently of the ejector base plate 231 after the second template 210 has completed its floating displacement. The slider core-pulling mechanism 100 is installed in the mold 200 in the manner described above: the slider 110 is horizontally housed in the second template 210, while the shovel base 120 is vertically housed in the cavity of the second template 210, and its bottom is fixed to the support plate 220. Therefore, the floating displacement between the second template 210 and the support plate 220 directly drives the lateral core pulling of the slider 110.

[0073] In some specific embodiments, reference is made to Figure 11 and Figure 12 The mold 200 is equipped with a hydraulic cylinder 240 and a locking mechanism 250 as a drive and control system. The cylinder body 241 of the hydraulic cylinder 240 is fixed to the support plate 220, and its telescopic rod 242 drives the ejector plate mechanism 230 to move vertically. The base 251 of the locking mechanism 250 is fixedly connected to the ejector base plate 231, the fastener 252 is fixed to the support plate 220, and the locking key 253 is fixed to the second template 210. In the initial stage of the secondary mold opening, the hydraulic cylinder drives the ejector plate mechanism 230 to push the second template 210 to produce a floating displacement. When the floating displacement reaches a preset value, the locking key 253 moves into the groove 2521 of the fastener 252, thereby locking the second template 210 and restricting its further vertical movement.

[0074] In this embodiment, the mold 200, in addition to integrating the aforementioned slider internal core-pulling mechanism 100, further integrates a slanted ejector mechanism 260 to collaboratively complete the demolding of the more complex internal undercut structure on the plastic part 300. For detailed structure of the slanted ejector mechanism 260, please refer to... Figures 15 to 20 .

[0075] The inclined push mechanism 260 mainly consists of a straight push rod 261, an inclined push rod 262, a guide sleeve 263, a transmission and engagement structure 264, and an inclined push block 265.

[0076] Straight rod 261, as shown in its structural diagram Figure 18 As shown, its bottom is connected to the ejector plate 232 of the mold. During operation, it directly receives the vertical upward driving force from the ejector plate 232. To achieve specific motion conversion, the straight ejector rod 261 has a non-circular cross-section, and a part of the transmission engagement structure 264, namely the helical tooth 2641, is integrally formed on one side of it.

[0077] Angled top rod 262, as shown in its structural diagram Figure 19 As shown, its axis forms a preset angle with the axis of the straight push rod 261 to accommodate the tilt angle of the internal undercut of the plastic part 300. Another part of the transmission and engagement structure 264, namely the inclined groove 2642 that meshes with the helical teeth 2641, is also integrally formed on its rod body. The top of the inclined push rod 262 is connected to an inclined push block 265 via a pin or similar means. The top surface of the inclined push block 265 is used to form the internal undercut of the plastic part 300. Specifically, in this embodiment, the inclined push block 265 is also specially provided with a second end face 2651. The second end face 2651 abuts against the slider 110 during injection molding of the plastic part 300, and during the second mold opening, due to the lateral core-pulling movement of the slider 110, the second end face 2651 separates from the inclined push block 265.

[0078] Guide sleeve 263, its structure is shown in the figure. Figure 20 As shown, this is the core constraint component that enables the stable movement of the inclined ejector mechanism. It is securely installed and fixed within the second template 210 of the mold 200 via fasteners 2634 passing through screw holes 2633. The guide sleeve 263 has integrally formed, interconnected straight guide holes 2631 and inclined guide holes 2632. The inner contour of the straight guide hole 2631 matches the non-circular cross-section of the straight ejector rod 261, guiding its vertical movement while strictly limiting any rotation around its own axis. The inclined guide hole 2632 guides the inclined ejector rod 262 to slide obliquely along its own axis.

[0079] The transmission engagement structure 264 consists of the helical teeth 2641 on the straight ejector rod 261 and the inclined groove 2642 on the inclined ejector rod 262. The entire transmission process is constrained within the guide sleeve 263. Its working principle is as follows: when the ejector plate 232 drives the straight ejector rod 261 to move vertically, the straight ejector rod 261 cannot rotate due to the constraint of the guide sleeve 263. The helical teeth 2641 on it act like a wedge, pushing against the wall of the inclined groove 2642. This pure inclined sliding engagement efficiently and stably converts the vertical linear motion input by the straight ejector rod 261 into the inclined linear motion of the inclined ejector rod 262 along its own axis, thereby driving the inclined ejector block 265 to complete ejection and demolding.

[0080] The complete demolding process of mold 200 includes a two-stage sequence:

[0081] First stage (slider core pulling): The hydraulic cylinder 240 is activated, and the second template 210 floats relative to the support plate 220. The driving force in this process is utilized by the core pulling mechanism 100 inside the slider, driving the slider 110 to complete the lateral core pulling and disengage the first inner undercut.

[0082] Second stage (slanted ejector demolding): When the floating displacement is completed, the latch 250 locks the second template 210, and the core-pulling action of the slider 110 also stops. At this time, the ejector plate 232 begins to move independently, driving the slanted ejector mechanism 260 to move, and its slanted ejector block 265 ejects the plastic part 300, finally completing the overall demolding of the plastic part 300.

[0083] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A slider-type internal core-pulling mechanism, applied to a mold with a secondary mold-opening function, used for demolding the internal undercut structure of a plastic part, characterized in that... include: A slider is horizontally housed within the second template of the mold, and the slider is provided with a first end face for forming the undercut of the plastic part; The shovel base is vertically housed within the second template of the mold. The bottom of the shovel base is fixedly mounted on the support plate of the mold, and the top of the shovel base is connected to the slider through a guide fitting structure. The guide and mating structure is used to convert the floating displacement of the second template into the lateral core-pulling motion of the slider.

2. The slide core-pulling mechanism according to claim 1, characterized in that The guiding and mating structure includes: T-shaped blocks, fixed to the top of the shovel base; and A T-slot is formed at one end of the slider and slides with the T-block. When the second template generates a floating displacement, the slider and the shovel base move relative to each other. Through the inclined guiding effect of the T-block and the T-slot, the movement is converted into the lateral inner core-pulling displacement of the slider.

3. The slide core-pulling mechanism according to claim 1, wherein Wear-resistant plates are also provided on the sliding contact surfaces of the slider and the shovel base with the second template.

4. The slide core-pulling mechanism according to claim 1, wherein The bottom of the shovel base is fixedly connected to a mounting base, which is fixed to the support plate of the mold.

5. The slide core-pulling mechanism according to claim 1, wherein The slider has an internal cooling water channel, which is connected to an external cooling system via an extension water pipe to control the temperature of the undercut end face of the slider.

6. A mold having a secondary mold opening function, characterized by comprising: The mold includes the slider core-pulling mechanism as described in any one of claims 1-5.

7. The mold of claim 6, wherein The mold also includes: A first template and a second template, the first template and the second template cooperate to define a mold cavity for molding plastic parts, and can be opened and closed along the first parting surface; A tray, configured to open and close twice along the second parting surface with the second template; and An ejector plate mechanism is housed within the support plate; the ejector plate mechanism includes an ejector base plate and an ejector panel, the ejector panel being configured to move independently relative to the ejector base plate after the second template has completed its floating displacement; The slider is horizontally housed within the second template, the shovel base is vertically housed within the second template of the mold, the bottom of the shovel base is fixedly mounted on the support plate, and the floating displacement of the second template and the support plate along the second parting surface is used to drive the slider to pull the core horizontally.

8. The mold of claim 7, wherein, The mold also includes: A hydraulic cylinder configured to drive the ejector plate mechanism to move relative to the support plate; the hydraulic cylinder includes a cylinder body and a telescopic rod, the cylinder body being fixedly connected to the support plate, and the telescopic rod being fixedly connected to the ejector plate mechanism, and is configured to drive the ejector plate mechanism to move in a vertical direction; and The fastening mechanism includes a base, a fastener, and a fastener key. The base is mounted on the ejector pin base plate, the fastener is mounted on the support plate, and the fastener key is mounted on the second template. The fastener has a groove, and the fastener key is configured to selectively engage and lock with the groove. After the second template completes the floating displacement relative to the support plate, the fastener key engages and locks with the groove of the fastener to limit further movement of the second template.

9. The mold of claim 8, wherein, The mold further includes a slanted ejector mechanism, which comprises: A straight push rod, which is connected to the ejector plate in a transmission manner; An inclined push rod has its axis forming a preset angle with the straight push rod; the top end of the inclined push rod is connected to an inclined push block for forming the internal inverted structure, and the inclined push block is also provided with a second end face that abuts against the slider; The guide sleeve has a straight guide hole and an oblique guide hole that are interconnected, which are used to slide and guide the straight push rod and the oblique push rod respectively; the guide sleeve is installed and fixed in the second template of the mold by fasteners; The transmission engagement structure includes helical teeth integrally formed on the straight push rod and helical groove integrally formed on the inclined push rod, and is constrained by the guide sleeve to convert the vertical linear movement of the straight push rod into the oblique movement of the inclined push rod along its own axis.

10. The mold of claim 9, wherein, The driving force of the inner core-pulling mechanism of the slider comes from the floating process of the second template relative to the support plate to realize the inner core-pulling movement in the first stage; after the core-pulling in the first stage is completed, the inclined ejector mechanism performs the demolding movement of the plastic part in the second stage.

Images