A high-density extrusion molding anti-back type side core-pulling structure and mold

Abstract

The utility model relates to die structure technical field discloses a kind of anti-retraction side core-pulling structure and mould for high-density extrusion forming, including mutually coordinated movable die and fixed die, side core-pulling mechanism is connected on movable die, fixed die is fixedly connected with the horizontal anti-retraction mechanism of preventing side core-pulling mechanism horizontal displacement after mould closing, and fixed die is fixedly connected with the vertical anti-retraction mechanism of extruding fixed side core-pulling mechanism in vertical direction.To solve the problem of poor injection molding quality in the prior art when injecting and molding the interface on the cover body during the pre-moulding stage and the final moulding stage of two injection molding stages.

Description

Technical Field

[0001] This utility model relates to the field of mold structure technology, specifically to a high-density extrusion molding anti-retraction side core pulling structure and mold. Background Technology

[0002] As attached Figure 1 The product shown is a control cover structure for a certain vehicle model. Because the control cover needs to connect with other components to provide a protective cover, its end face needs to be waterproof during actual installation. Therefore, the flatness requirements for the control cover's end face are extremely high during injection molding. The overall size of the control cover is very large. In addition to the cover body structure, there is an interface on one side of the cover body with an undercut structure. Therefore, in designing the mold, besides setting up mutually cooperating moving and fixed molds, a side core-pulling structure is also required. The interface occupies a very limited volume of the control cover; therefore, the injection molding process mainly considers the injection molding of the cover body. To ensure the injection molding quality of such a large product, the conventional solution is to increase the injection pressure or extend the holding time during injection molding to improve molding quality. However, as shown in the attached... Figure 1 As shown, the control cover is not only very large in size, but also has a very complex internal structure, combined with the attached... Figure 2 Especially on the end face where the flatness requirement is extremely high, a sealing ring groove also needs to be formed, which means that conventional methods to improve the quality of injection molding cannot effectively meet the flatness requirements of the end face.

[0003] To address the aforementioned issues, the inventors improved the mold structure. In the actual molding process, the mold closing stage of the moving and fixed molds is divided into a pre-mold closing stage and a final mold closing stage. The pre-mold closing stage forms a pre-cavity with a volume larger than the product volume, and the injection process is completed in the pre-cavity stage. After injection, the molds continue to close, ultimately closing the moving and fixed molds to a final cavity state with the same dimensions and structure as the product. While this injection molding method consumes more material compared to conventional injection molding, the resulting product has increased density, and the end face flatness of the cover plate is excellent, meeting the product flatness requirements.

[0004] Although the above-mentioned improved solution can injection mold a highly flat end face structure, because one side of the cover plate body has an interface with a snap-down, a side core-pulling structure needs to be set on the mold during the molding process. Based on the interface shape characteristics, the side core-pulling structure includes at least an upper core-pulling structure, a lower core-pulling structure, and an inner core-pulling structure. The upper and lower core-pulling structures close together to form a ring-shaped outer core-pulling structure, and the inner core-pulling structure is coaxially located within the outer core-pulling structure. While the upper, lower, and inner core-pulling structures can complete the injection molding of the interface, in the actual molding process, the mold closing process of the cover plate body is divided into a pre-mold closing stage and a final mold closing stage. Since the interface occupies a small proportion of the control cover plate body, the final mold closing of the side core-pulling structure can be completed in the pre-mold closing stage. In the final mold closing stage, the side core-pulling structure stops moving, and the interface molding is successfully completed. However, existing conventional side core-pulling structures are prone to displacement when subjected to lateral high pressure during injection, affecting the molding quality of the interface. Moreover, with the inventor's improved solution, the side core-pulling structure not only bears lateral high pressure but also vertical high pressure, causing the side core-pulling structure to warp and affecting the interface molding. Therefore, it is necessary to set up a reasonable side core-pulling structure to stably complete the injection molding of the cover plate body and the interface. Utility Model Content

[0005] The present invention aims to provide a high-density extrusion molding anti-retraction side core-pulling structure and mold to solve the problem of poor injection molding quality when the cover plate body is injection molded through the pre-molding stage and the final molding stage in the prior art.

[0006] To solve the above problems, the present invention adopts the following technical solution: a high-density extrusion molding anti-retraction side core pulling structure, including a moving mold and a fixed mold that cooperate with each other, a side core pulling mechanism connected to the moving mold, a lateral anti-retraction mechanism fixedly connected to the fixed mold to prevent the side core pulling mechanism from shifting laterally after the mold is closed, and a vertical anti-retraction mechanism fixedly connected to the fixed mold to press and fix the side core pulling mechanism in the vertical direction.

[0007] The principles and beneficial effects of this application are as follows: In this application, after the fixed mold and the moving mold are closed, the lateral anti-retraction mechanism fixedly connected to the fixed mold plays an anti-retraction role against the side core-pulling mechanism in the lateral direction, and the vertical anti-retraction mechanism fixedly connected to the fixed mold squeezes and fixes the side core-pulling mechanism in the vertical direction. Even if there is a pre-mold closing stage and a final mold closing stage between the moving mold and the fixed mold, after the side core-pulling mechanism completes the mold closing in the pre-mold closing stage, the lateral anti-retraction mechanism and the vertical anti-retraction mechanism act on the side core-pulling mechanism simultaneously, so that the side core-pulling mechanism is firmly fixed in both the lateral and vertical directions. Thus, in the final mold closing stage of the moving mold and the fixed mold, the side core-pulling mechanism can withstand the huge pressure in the final cavity without displacement, ensuring that the undercut structure of the product corresponding to the side core-pulling mechanism can be successfully injection molded. Of course, the anti-retraction side core-pulling structure in this application can not only be used for high-density extrusion molding of products, but also provide stable support and positioning for the side core-pulling mechanism in the conventional large-size product injection molding process, so as to ensure that the undercut structure of the product is successfully formed.

[0008] Preferably, as an improvement, the side core-pulling mechanism includes a lower core-pulling mechanism, an upper core-pulling mechanism, and an inner core-pulling mechanism. The lower core-pulling mechanism is fixedly connected to the moving mold. An outer slide block is laterally slidably connected to the moving mold. An inner slide block is laterally slidably connected to the outer slide block. The upper core-pulling mechanism is vertically slidably connected to the slide block and cooperates with the lower core-pulling mechanism to form an outer core-pulling mechanism. The inner core-pulling mechanism is coaxially cooperated with the outer core-pulling mechanism and fixedly connected to the outer slide block. A first driving mechanism for driving the outer slide block and the inner slide block to slide or reset sequentially is connected to the moving mold. A second driving mechanism for driving the upper core-pulling mechanism to demold and close the mold is connected between the inner slide block and the upper core-pulling mechanism. A lateral anti-retraction mechanism acts laterally on the outer slide block and the inner slide block, and a vertical anti-retraction mechanism acts vertically on the upper core-pulling mechanism.

[0009] In this scheme, under the driving action of the first driving mechanism, the outer slide and the inner slide slide are slid to the mold closing position respectively. Under the action of the second driving mechanism, the upper core puller, which is vertically slidably connected on the inner slide, slides downward to the mold closing state where it is docked with the lower core puller. At this time, the upper core puller, the lower core puller, and the inner core puller are in the final mold closing state, and the upper core puller and the lower core puller dock with each other to form an outer core puller with a ring structure. The inner core puller is coaxially set inside the outer core puller. At this time, the transverse anti-retraction mechanism connected to the fixed mold acts transversely on the outer slide and the inner slide, on the outer side... The core-pulling mechanism prevents the outer and inner slide blocks from loosening laterally when the mold is closed, while the vertical anti-retraction mechanism acts vertically on the upper core-pulling mechanism. The lower core-pulling mechanism is fixedly connected to the moving mold, thus keeping the upper and lower core-pulling mechanisms firmly abutting each other. This effectively maintains the stability of the entire side core-pulling mechanism during high-pressure injection molding of the cover plate body and interface, especially ensuring the stability of the upper and inner core-pulling positions (the lower core-pulling mechanism is fixedly connected to the moving mold and is less affected by the high pressure of injection molding). This effectively guarantees the stability of the injection molding of the cover plate body and interface, and improves the injection molding quality of the product.

[0010] Preferably, as an improvement, a mold closing insertion part is provided between the upper and lower core pullers, and the mold closing insertion part includes a plugging protrusion and a slot that are mutually plugged and matched.

[0011] With a lateral anti-retraction mechanism already in place on the side core-pulling mechanism to prevent lateral displacement of the inner and outer slide blocks, this solution also includes a mold-closing insertion part between the upper and lower core-pulling parts. This mold-closing insertion part includes an insertion protrusion and a slot that engage along the mold-closing direction of the upper and lower core-pulling parts, making the lateral connection between the upper and lower core-pulling parts more stable after mold closing. Furthermore, when the inner slide block drives the upper core-pulling part to slide and demold, because the insertion protrusion is in the slot-inserted state, the upper core-pulling part cannot slide laterally and can only slide vertically when the inner slide block slides laterally due to the limiting effect of the insertion protrusion and slot. Only after the insertion protrusion exits the slot can the upper core-pulling part slide synchronously with the inner slide block, achieving stable and precise demolding of the upper core-pulling part through the engagement of the insertion protrusion and slot.

[0012] Preferably, as an improvement, the first driving mechanism includes a transverse driver and a driving rod transversely connected to the transverse driver. The outer wall of the driving rod is provided with an outer clamping step and an inner clamping step. The outer slide is provided with an outer clamping surface that clamps against the outer clamping step, and the inner slide is provided with an inner clamping surface that clamps against the inner clamping step. The outer slide is provided with a through hole for the inner clamping step to pass through laterally, and the outer slide is provided with an outer demolding surface that is directly opposite to the inner clamping surface. A pulling boss is fixedly connected to the driving rod, and the inner slide is provided with an inner demolding surface that cooperates with the pulling boss.

[0013] In this design, when the upper core puller, lower core puller, and inner core puller are demolded from the mold-closed state, the fixed mold and the moving mold first move away from each other, causing the anti-retraction clamping effect of the lateral anti-retraction mechanism on the inner and outer slides to disappear, and the vertical clamping effect of the vertical anti-retraction mechanism on the upper core puller to disappear. Then, the pulling boss contacts the inner demolding surface on the inner slide. A first demolding gap is provided between the inner clamping surface on the inner slide and the outer demolding surface on the outer slide. When the lateral actuator pulls the drive rod to make the pulling boss abut against the inner demolding surface, the inner slide slides relative to the outer slide under the pulling force of the pulling boss. When in motion, the upper core puller is driven to slide vertically through the second drive mechanism to demold from the lower core puller. Under the insertion and engagement of the mold closing part, the upper core puller can only slide vertically in the initial stage of demolding, causing the insertion and engagement of the mold closing part to disappear. Then, as the pulling boss continues to pull the inner slide, the inner slide and the upper core puller slide synchronously until the inner abutting surface on the inner slide and the outer demolding surface of the outer slide are abutted. At this point, the drive rod pulls the outer slide, inner slide and upper core puller synchronously through the pulling boss, causing the inner core puller fixedly connected to the outer slide to slide, and finally completing the demolding of the upper core puller and the inner core puller in sequence.

[0014] During the mold closing stage, the inner clamping step on the drive rod first contacts and abuts against the inner clamping surface of the inner slide, causing the inner slide and the upper core pull to slide laterally and reset. Under the driving action of the second drive mechanism, the upper core pull and the lower core pull are engaged and the mold is closed. Then, the outer clamping step of the drive rod contacts and abuts against the outer clamping surface of the outer slide, causing the outer slide to be pushed by the drive rod to reset the inner core pull. Finally, the moving mold approaches the fixed mold and the mold is closed, thus easily completing the entire mold closing action.

[0015] Preferably, as an improvement, the lateral anti-recoil mechanism includes an outer anti-recoil block and an inner anti-recoil block. The outer anti-recoil block is provided with an outer anti-recoil surface that abuts against the outer abutting surface, and the inner anti-recoil block is provided with an inner anti-recoil surface that abuts against the inner abutting surface.

[0016] In this design, the lateral anti-retraction mechanism includes an outer anti-retraction block and an inner anti-retraction block. The outer anti-retraction block has an outer anti-retraction surface that fits tightly against the outer clamping surface, and the inner anti-retraction block has an inner anti-retraction surface that fits tightly against the inner clamping surface. After both the upper and inner core pulls have completed the mold closing action, the outer slide block keeps the inner core pull in a fixed position under the clamping action of the outer anti-retraction block, and the inner slide block keeps its lateral position fixed under the clamping action of the inner anti-retraction block. Combined with the insertion and engagement of the mold closing joint between the upper and lower core pulls, the upper core pull remains in a fixed position during the injection of the plastic material, thereby stably achieving the anti-retraction function and ensuring stable and high-quality injection molding of the interface.

[0017] Preferably, as an improvement, the outer slide block is provided with a transverse slide groove, and the inner slide block is fixedly connected to a slider located between the pulling boss and the transverse driver. The slider slides in cooperation with the transverse slide groove. The through hole is opened on the slider. The side of the slider facing the transverse driver is the inner abutting surface, and the side of the slider facing the pulling boss is the inner demolding surface. When the outer core pull and the inner core pull are molded together, the inner abutting surface and the outer demolding surface are in a state of mutual distance.

[0018] In this design, a transverse groove is provided on the outer slide block, and a slider is fixed on the inner slide block. The slider slides in conjunction with the transverse groove, and the through hole, inner clamping surface, and inner demolding surface are all located on the slider. This allows the drive rod and the pulling boss to more easily and accurately engage with the through hole, inner clamping surface, and inner demolding surface. Furthermore, when the outer and inner core pullers are in the final mold-closed state, the inner clamping surface and the outer demolding surface are far apart, while the pulling boss and the inner demolding surface are in contact. This allows the transverse actuator to first pull the inner slide block through the drive rod and the pulling boss when demolding begins, causing the inner slide block to drive the upper core puller to slide vertically for demolding first, and then drive the outer slide block to slide to demold the inner core puller, effectively ensuring the demolding sequence.

[0019] Preferably, as an improvement, the vertical anti-retraction mechanism includes a vertical driver and an extrusion block fixedly connected to the vertical driver. The vertical driver is fixedly connected to the fixed mold, and the side of the upper core pull away from the lower core pull has an extrusion surface that is directly opposite to and cooperates with the extrusion block.

[0020] The vertical anti-retraction mechanism in this solution includes a vertical driver and an extrusion block connected to the vertical driver. When the upper and lower core pulls come into contact with each other and finally close the mold, the vertical driver drives the extrusion block to approach and press against the upper core pull. During the injection molding process, the upper core pull is kept in a precise mold-closing state with the lower core pull, which effectively ensures the injection molding quality of the structure.

[0021] Preferably, as an improvement, a mounting base is fixedly connected to the fixed mold, a transverse driver is fixedly connected to the mounting base, and a limiting post that cooperates with the outer slide is fixedly connected to the mounting base; a limiting plate that cooperates with the upper core puller is fixedly connected to the outer slide.

[0022] This design incorporates a mounting base for easier installation of the lateral drive unit. A limiting post is fixedly connected to the mounting base to control the stroke of the drive rod pulling the outer slide and the inner core-pulling demolding. The endpoint of the outer slide's sliding motion driving the inner core-pulling demolding stroke is also controlled, ensuring precise control of the outer slide's lateral movement and improving its accuracy. Furthermore, a limiting plate is fixedly connected to the outer slide. When the drive rod drives the outer slide to contact the positioning surface, causing the inner core-pulling to close, as the moving mold approaches the fixed mold, the inner guide slope on the inner anti-retraction block contacts and abuts against the inner chamfer on the inner slide. Under the abutting force of the inner anti-retraction block, the inner slide slides to the reset position. During this process, the limiting plate's blocking effect on the upper core-pulling, combined with the action of the second drive mechanism between the inner slide and the upper core-pulling, causes the upper core-pulling to slide vertically, allowing the upper and lower core-pulling parts to interlock. This ensures precise alignment and mold engagement between the upper and lower core-pulling parts.

[0023] Preferably, as an improvement, a driving protrusion is fixedly connected to the inner slide, and the second driving mechanism includes an inclined T-shaped buckle and an inclined T-shaped groove that are slidably engaged between the driving protrusion and the upper core puller.

[0024] In this scheme, the inclined T-shaped buckle and inclined T-shaped groove with inclined sliding fit are used as the second driving mechanism. When the inner slide block slides relative to the upper core puller, the upper core puller can be driven to slide vertically relative to the lower core puller by the relative fit of the inclined T-shaped buckle and inclined T-shaped groove. The structure is simple and the drive is stable.

[0025] A mold comprising the aforementioned anti-retraction side-pulling structure. Attached Figure Description

[0026] Figure 1This is a schematic diagram of a control cover in the prior art.

[0027] Figure 2 This is a schematic diagram of the control of the ground surface by the cover plate in the prior art.

[0028] Figure 3 A schematic diagram of a high-density extrusion molding anti-retraction side core-pulling structure in Embodiment 1 of this utility model. Figure 4 for Figure 3 A schematic diagram showing the hidden vertical anti-retraction mechanism, moving mold, and control cover plate.

[0029] Figure 5 for Figure 4 A schematic diagram showing the hidden outer guide block and inner guide block.

[0030] Figure 6 for Figure 5 A schematic diagram showing the hidden inner slide, the upper core puller, and the inner anti-retraction block.

[0031] Figure 7 This is a schematic diagram of the outer anti-retraction block and the inner anti-retraction block in Embodiment 1 of this utility model.

[0032] Figure 8 This is a schematic diagram of the outer slide in Embodiment 1 of this utility model.

[0033] Figure 9 This is a schematic diagram of the outer slide from another perspective in Embodiment 1 of this utility model.

[0034] Figure 10 This is a schematic diagram of the inner slide in Embodiment 1 of this utility model.

[0035] Figure 11 This is a schematic diagram of the inner slide from another perspective in Embodiment 1 of this utility model.

[0036] Figure 12 This is a schematic diagram of the upper core pulling in Embodiment 1 of this utility model.

[0037] Figure 13 This is a front sectional view of the side core-pulling mechanism in the fully closed mold state in Embodiment 1 of this utility model.

[0038] Figure 14 This is a front sectional view of the side core-pulling mechanism in the demolding state in Embodiment 1 of this utility model.

[0039] Figure 15 This is a schematic diagram of a high-density extrusion molding anti-retraction side core-pulling structure according to Embodiment 2 of this utility model. Detailed Implementation

[0040] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: moving mold 1, lower core puller 2, slot 201, outer slide block 3, outer stop protrusion 301, transverse slide groove 302, outer abutment surface 303, outer demolding surface 304, inner slide block 4, slider 401, inner stop protrusion 402, inner abutment surface 403, inner demolding surface 404, inner chamfer 405, drive protrusion 406, extrusion surface 4061, inclined T-slot 407, upper core puller 5, inclined T-slot 501, insertion protrusion 502, limiting surface 503, inner core puller 6. 7. Outer guide block, 8. Inner guide block, 9. Lateral actuator, 10. Drive rod, 10. Outer clamping step, 1001. Inner clamping step, 1002. Pulling boss, 1003. Mounting base, 11. Outer anti-retraction block, 12. Outer anti-retraction surface, 1201. Outer guide slope, 1202. Inner anti-retraction block, 13. Inner anti-retraction surface, 1301. Inner guide slope, 1302. Limiting plate, 14. Vertical actuator, 15. Pressing block, 16. Limiting post, 17. Cover plate body, 1000. Interface, 10001. Sealing ring groove, 10002.

[0041] Appendix Figure 1 and attached Figure 2 The control cover used in the vehicle in the prior art includes a cover body 1000 and an interface 10001 located on the left side of the cover body 1000. The bottom end of the cover body 1000 has an end face with very high flatness requirements, and a sealing ring groove 10002 is provided on the end face. The entire cover body 1000 and interface 10001 are made by integral injection molding. Since there is an undercut structure on the interface 10001, a side core pulling structure needs to be set when designing the mold.

[0042] Example 1 This embodiment is as shown in the attached figure. Figure 3 As shown: A high-density extrusion molding anti-retraction side core pulling structure includes a moving mold 1 and a fixed mold (not shown) that cooperate with each other. A side core pulling mechanism is connected to the moving mold 1. A lateral anti-retraction mechanism is fixedly connected to the fixed mold to prevent the side core pulling mechanism from shifting laterally after the mold is closed. A vertical anti-retraction mechanism is fixedly connected to the fixed mold to press and fix the side core pulling mechanism vertically.

[0043] Combination Figure 3 , Figure 4 and Figure 13 The side core-pulling mechanism includes a lower core-pulling mechanism 2, an upper core-pulling mechanism 5, and an inner core-pulling mechanism 6. The upper core-pulling mechanism 5 and the lower core-pulling mechanism 2 are in contact with each other to form an annular outer core-pulling mechanism. The inner core-pulling mechanism 6 is coaxially arranged inside the annular outer core-pulling mechanism. An outer slide block 3 is laterally slidably connected to the moving mold 1. An inner slide block 4 is laterally slidably connected to the outer slide block 3. The lower core-pulling mechanism 2 is fixedly connected to the moving mold 1 by screws. The upper core-pulling mechanism 5 is vertically slidably connected to the inner slide block 4. The inner core-pulling mechanism 6 is fixedly connected to the right end of the outer slide block 3 by screws.

[0044] Combination Figure 4 and Figure 5 To facilitate smooth sliding of the outer slide block 3 relative to the moving mold 1 and the inner slide block 4 relative to the outer slide block 3, in this embodiment, two outer guide blocks 7 are fixedly connected to the moving mold 1 by screws. The two outer guide blocks 7 are located on both sides of the outer slide block 3. The side walls of the outer slide block 3 are integrally formed with outer stop protrusions 301 that slide in cooperation with the outer guide blocks 7. Under the sliding cooperation between the outer stop protrusions 301 and the outer guide blocks 7, the outer slide block 3 can slide laterally accurately and smoothly relative to the moving mold 1. Figure 13 The bottom left side of the inner slide block 4 is fixedly connected to the slider 401 by an integral molding method. The top surface of the outer guide block 7 has a transverse sliding groove 302. The slider 401 is slidably connected to the transverse sliding groove 302. Two inner guide blocks 8 are fixedly connected to the outer slide block 3 by screws. The two inner guide blocks 8 are located on both sides of the inner slide block 4. Both sides of the inner slide block 4 have an integrally molded inner stop protrusion 402. The inner stop protrusion 402 slides in cooperation with the inner guide block 8. Relying on the sliding cooperation between the inner stop protrusion 402 and the inner guide block 8, and the sliding cooperation between the slider 401 and the transverse sliding groove 302, the inner slide block 4 can slide smoothly and accurately relative to the outer slide block 3 laterally.

[0045] Combination Figure 3 and Figure 4 The moving mold 1 is connected to a first driving mechanism for driving the outer slide block 3 and the inner slide block 4 to slide or reset sequentially. The inner slide block 4 and the upper core pull 5 are connected to a second driving mechanism for driving the upper core pull 5 and the lower core pull 2 ​​to dock and cooperate to finally close the mold or to move away from each other to demold.

[0046] Specifically, in combination Figure 3 , Figure 4 and Figure 6 In this embodiment, the first driving mechanism includes a horizontal driver 9 and a driving rod 10 horizontally fixedly connected to the horizontal driver 9. To facilitate the installation of the horizontal driver 9, a vertically arranged mounting base 11 is fixedly connected to the moving mold 1 by screws. In this embodiment, the horizontal driver 9 is a driving cylinder fixedly connected to the mounting base 11 by screws. The outer wall of the driving rod 10 is integrally formed from left to right with an outer clamping step 1001, an inner clamping step 1002, and a pulling boss 1003. The diameter of the outer clamping step 1001 is larger than the diameter of the inner clamping step 1002, and the diameter of the inner clamping step 1002 is equal to the diameter of the pulling boss 1003. Meanwhile, combined with... Figure 8 , Figure 9 , Figure 10 and Figure 11The outer slide 3 has an outer abutting surface 303 on its left side that abuts against the outer abutting step 1001. The inner slide 4 has an inner abutting surface 403 on its left side that abuts against the inner abutting step 1002. The inner slide 4 has an inner demolding surface 404 on its right side that abuts against the pulling boss 1003. The outer slide 3 has an outer demolding surface 304 that abuts against the inner abutting surface 403. Correspondingly, an external through groove is provided on the left side wall of the outer slide block 3 for the inner clamping step 1002 and the pulling boss 1003 to pass laterally. A through hole is provided on the slide block for the pulling boss 1003 to pass laterally. In order to enable the inner clamping step 1002 and the pulling boss 1003 to pass laterally smoothly, a clearance plane is provided on both sides of the inner clamping step 1002 and both sides of the pulling boss 1003. When the pulling boss 1003 is rotated 90 degrees, it passes through the through hole on the slide block and then rotates back 90 degrees, so that the left side of the pulling boss 1003 can contact the inner demolding surface 404.

[0047] Combination Figure 4 and Figure 7 The lateral anti-recoil mechanism includes an outer anti-recoil block 12 and an inner anti-recoil block 13. The outer anti-recoil block 12 has an outer anti-recoil surface 1201 that abuts against the outer abutting surface 303, and the inner anti-recoil block 13 has an inner anti-recoil surface 1301 that abuts against the inner abutting surface 403. In order to make the outer anti-recoil block 12 and the inner anti-recoil block 13 cooperate more smoothly, in this embodiment, an outer guide slope 1202 that cooperates with the outer anti-recoil surface 1201 is opened at the bottom right side of the outer anti-recoil block 12, and an inner guide slope 1302 that cooperates with the inner anti-recoil surface 1301 is opened on the inner anti-recoil block 13. The top left side of the inner slide block 4 has an inner chamfer 405 that slides with the inner guide slope 1302. The vertical anti-recoil mechanism includes a vertical actuator 15 and a pressing block 16 that is fixedly connected to the vertical actuator 15 by screws. In this embodiment, the vertical actuator 15 includes a nitrogen spring that is fixedly connected to the fixed mold by screws.

[0048] Combination Figure 10 , Figure 11 and Figure 12 In this embodiment, a driving protrusion 406 is integrally formed on the right side of the inner slide block 4. The second driving mechanism includes an inclined T-shaped buckle and an inclined T-shaped groove that slide and cooperate with each other between the driving protrusion 406 and the upper core pull 5. The inclined T-shaped groove is opened on the bottom surface of the driving protrusion 406, and the inclined T-shaped buckle is integrally formed on the top surface of the upper core pull 5. The top surface of the driving protrusion 406 is provided with an extrusion surface 4061 that directly cooperates with the extrusion block 16. At the same time, a mold closing insertion part is provided between the upper core pull 5 and the lower core pull 2. The mold closing insertion part includes a vertically interlocking insertion protrusion 502 and a slot 201, wherein the insertion protrusion 502 is integrally formed on the upper core pull 5. Figure 6The slot 201 is opened on the lower core 2, and there are two insertion protrusions 502, which are located on both sides of the upper core 5. In order to make the upper core 5 more accurate during the reset process, in this embodiment, a limiting plate 14 is fixedly connected to the outer slide 3 by screws. There are two limiting plates 14, which are located on both sides of the upper core 5. The upper core 5 is provided with a limiting surface 503 that cooperates with the limiting plate 14.

[0049] In this embodiment, the mold closing state of the side core-pulling mechanism is as follows: Figure 13 As shown, when the product is demolded after injection molding, the moving mold 1 moves away from the fixed mold. The moving mold 1 drives the outer anti-retraction block 12 and the inner anti-retraction block 13 to move synchronously, so that the outer anti-retraction block 12 loses its anti-retraction effect on the outer slide block 3, and the inner anti-retraction block 13 loses its anti-retraction effect on the inner slide block 4. At the same time, the fixed mold drives the vertical actuator 15 away from the moving mold 1, so that the pressing and squeezing effect of the extrusion block 16 on the upper core pull 5 disappears. Then, the drive cylinder pulls the drive rod 10 to slide to the left. First, it pulls the protrusion, which in turn pulls the slider 401, the inner slide 4, and the drive protrusion 406 to slide to the left simultaneously. Since the insertion protrusion 502 is in the insertion state with the slot 201, when the drive protrusion 406 slides to the left, the upper core pull 5 can only slide upwards, causing the insertion protrusion 502 to exit the slot 201. After the insertion protrusion 502 slides upwards out of the slot 201, the upper core pull 5 completes demolding and can then slide to the left synchronously with the inner slide 4. As the drive rod 10 continues to pull the inner slide 4 to the left, the inner abutting surface 403 on the inner slider 401 abuts against the outer demolding surface 304 of the outer slide 3. The outer slide 3 is abutted and slides to the left synchronously with the inner slide 4. At this time, the outer slide 3 drives the inner core pull 6 to slide to the left and demold, finally achieving demolding of the entire side core pull structure.

[0050] After the side core-pulling mechanism is demolded, Figure 14As shown, during the mold closing stage, the drive cylinder first pushes the drive rod 10 to gradually extend to the right. The inner clamping step 1002 first abuts against the inner clamping surface 403. At this time, the slider 401, inner slide 4, drive protrusion 406, and upper core pull 5 slide to the right. When the drive rod 10 extends to the right a certain distance (e.g., 20.5mm), the outer clamping step 1001 contacts the outer clamping surface 303, causing the outer slide 3 to be subjected to force and slide to the right synchronously with the slider 401, inner slide 4, drive protrusion 406, and upper core pull 5 until the upper core pull 5 slides to contact the limiting plate 14 and stops sliding. At this time, the upper core pull 5 is located directly above the lower core pull 2, and the inner core pull 6 is reset under the sliding action of the outer slide 3. Finally, the moving mold 1 approaches the fixed mold, and the inner guide slope 1302 of the inner anti-retraction block 13 abuts against the inner slide 4. The inner chamfer 405 of the upper part is engaged, causing the inner slide block 4, along with the slider 401 and the drive protrusion 406, to continue sliding to the right. At this point, since the upper core pull 5 is already against the limiting plate 14 and cannot continue to slide to the right, the upper core pull 5, under the force of the drive protrusion 406, moves downward and contacts the lower core pull 2 ​​in cooperation with the inclined T-shaped buckle and inclined T-shaped groove, completing the mold closing of the outer core pull. The insertion protrusion 502 is inserted into the slot 201, the inner demolding surface 404 on the slider 401 contacts the left side wall of the pulling boss 1003, and the outer anti-retraction surface 1201 of the outer anti-retraction block 12 contacts the outer abutting surface 303 on the outer slide block 3. Then, the vertical driver 15 drives the extrusion block 16 to approach and press down against the upper core pull 5, and the entire side core pull structure returns to its original position. Figure 13 The mold closing state.

[0051] In this embodiment, since the insertion protrusion 502 and the slot 201 are in the insertion state when the mold is closed, the upper core pull 5 can stably cooperate with the lower core pull 2 ​​to form the outer core pull. The outer anti-retraction block 12 has a lateral anti-retraction effect on the outer slide block 3, the inner anti-retraction block 13 has a lateral anti-retraction effect on the inner slide block 4, and the extrusion block 16 has a vertical anti-retraction effect on the upper core pull 5. This makes the entire side core pull structure horizontally connected and stable after the mold is closed. Even if the product injection pressure is large, or the moving mold 1 and the moving mold 1 are divided into a pre-mold closing stage and a final mold closing stage during the mold closing process, the entire side core pull mechanism completes the mold closing during the pre-mold closing stage. Even if huge pressure is generated in the final cavity during the final mold closing stage of the moving mold 1 and the fixed mold, the upper core pull 5 and the inner core pull 6 will not shift laterally, effectively ensuring the quality of the product interface 10001 injection molding.

[0052] A mold comprising the aforementioned anti-reverse side core-pulling structure for high-density extrusion molding.

[0053] Example 2 The difference between Example 2 and Example 1 is as follows: Figure 15As shown, in this embodiment, a limiting post 17 is fixedly connected to the mounting base 11 by screws. The limiting post 17 is arranged horizontally and the right end face of the limiting post 17 faces the outer abutment surface 303 of the outer slide block 3. The limiting post 17 is used to limit the horizontal sliding position of the outer slide block 3, so that the stroke of the entire structure is more precise and controllable.

[0054] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high-density extrusion molding anti-retraction side core-pulling structure, comprising a moving mold and a fixed mold that cooperate with each other, characterized in that: The moving mold is connected to a side core-pulling mechanism, and the fixed mold is fixedly connected to a lateral anti-retraction mechanism to prevent the side core-pulling mechanism from shifting laterally after the mold is closed. The fixed mold is also fixedly connected to a vertical anti-retraction mechanism that presses and fixes the side core-pulling mechanism in the vertical direction.

2. The anti-retraction side core-pulling structure for high-density extrusion molding according to claim 1, characterized in that: The side core-pulling mechanism includes a lower core-pulling mechanism, an upper core-pulling mechanism, and an inner core-pulling mechanism. The lower core-pulling mechanism is fixedly connected to the moving mold. An outer slide block is laterally slidably connected to the moving mold. An inner slide block is laterally slidably connected to the outer slide block. The upper core-pulling mechanism is vertically slidably connected to the slide block and cooperates with the lower core-pulling mechanism to form an outer core-pulling mechanism. The inner core-pulling mechanism is coaxially cooperated with the outer core-pulling mechanism and fixedly connected to the outer slide block. A first driving mechanism is connected to the moving mold for driving the outer slide block and the inner slide block to slide or reset sequentially. A second driving mechanism is connected between the inner slide block and the upper core-pulling mechanism for driving the upper core-pulling mechanism to demold and close. A lateral anti-retraction mechanism acts laterally on the outer slide block and the inner slide block, and a vertical anti-retraction mechanism acts vertically on the upper core-pulling mechanism.

3. The anti-retraction side core-pulling structure for high-density extrusion molding according to claim 2, characterized in that: A mold closing insertion part is provided between the upper and lower core pulling parts, and the mold closing insertion part includes a plugging protrusion and a slot that are mutually plugged and matched.

4. The anti-retraction side core-pulling structure for high-density extrusion molding according to claim 2, characterized in that: The first driving mechanism includes a transverse driver and a driving rod transversely connected to the transverse driver. The outer wall of the driving rod is provided with an outer clamping step and an inner clamping step. The outer slide is provided with an outer clamping surface that clamps against the outer clamping step, and the inner slide is provided with an inner clamping surface that clamps against the inner clamping step. The outer slide is provided with a through hole for the inner clamping step to pass through laterally, and the outer slide is provided with an outer demolding surface that is directly opposite to the inner clamping surface. A pulling boss is fixedly connected to the driving rod, and the inner slide is provided with an inner demolding surface that cooperates with the pulling boss.

5. The anti-retraction side core-pulling structure for high-density extrusion molding according to claim 4, characterized in that: The lateral anti-recoil mechanism includes an outer anti-recoil block and an inner anti-recoil block. The outer anti-recoil block has an outer anti-recoil surface that fits tightly against the outer abutting surface, and the inner anti-recoil block has an inner anti-recoil surface that fits tightly against the inner abutting surface.

6. The anti-retraction side core-pulling structure for high-density extrusion molding according to claim 5, characterized in that: The outer slide block is provided with a transverse slide groove, and the inner slide block is fixedly connected to a slider located between the pull boss and the transverse driver. The slider slides in cooperation with the transverse slide groove. The through hole is opened on the slider. The side of the slider facing the transverse driver is the inner abutting surface, and the side of the slider facing the pull boss is the inner demolding surface. When the outer core pull and the inner core pull are molded together, the inner abutting surface and the outer demolding surface are in a state of mutual distance.

7. The anti-retraction side core-pulling structure for high-density extrusion molding according to claim 2, characterized in that: The vertical anti-retraction mechanism includes a vertical driver and an extrusion block fixedly connected to the vertical driver. The vertical driver is fixedly connected to the fixed mold, and the side of the upper core pull away from the lower core pull has an extrusion surface that is directly opposite to and cooperates with the extrusion block.

8. The anti-retraction side core-pulling structure for high-density extrusion molding according to claim 4, characterized in that: A mounting base is fixedly connected to the fixed mold, and a transverse driver is fixedly connected to the mounting base. A limiting post that cooperates with the outer slide is fixedly connected to the mounting base; a limiting plate that cooperates with the upper core puller is fixedly connected to the outer slide.

9. A high-density extrusion molding anti-retraction side core-pulling structure according to claim 2, characterized in that: The inner slide is fixedly connected to a drive protrusion, and the second drive mechanism includes an inclined T-shaped buckle and an inclined T-shaped groove that are slidably engaged between the drive protrusion and the upper core puller.

10. A mold, characterized in that: Including a high-density extrusion molding anti-retraction side core-pulling structure as described in any one of claims 1-9.

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