Injection mold with lateral core pulling
By introducing a stop and a fastening assembly into the injection mold, and using delayed linkage and elastic components, the deformation problem caused by the difficulty in separating the slider core from the product was solved, thus achieving a reliable core-pulling process and ensuring product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN SUNZONE PRECISION TECH
- Filing Date
- 2025-09-05
- Publication Date
- 2026-08-04
AI Technical Summary
In the current injection mold core-pulling process, the contact area between the slider core and the product is too large, making it difficult to separate the slider core from the product and easily causing product deformation. This is especially true when the core-pulling of the slider is linked with the front mold, as the product's sides are unsupported and deform.
Introducing a stop and a locking assembly into the injection mold, the stop and the slider form a delayed linkage. Through the cooperation of elastic elements and blocks, the stop is restricted to remain fixed during the initial core pulling to avoid the product side being unsupported. Then, when the slider moves to a specific position, the restriction on the stop is released to achieve complete core pulling.
It effectively avoids product deformation caused by lack of side support during the core-pulling process, ensuring product quality, and achieves complete core-pulling through reliable action coordination.
Smart Images
Figure CN224588514U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molds, specifically to an injection mold with a side core-pulling mechanism. Background Technology
[0002] Injection molding is a processing method used for the mass production of certain parts. The specific steps involve injecting molten material under high pressure into a mold cavity, which then cools and solidifies to obtain the molded product. Injection molds are the tools used in injection molding.
[0003] For product structures with lateral recesses, current injection molding methods involve inserting a slider core into the side of the injection cavity to aid in molding. During mold opening, the laterally sliding slider pulls the slider core out laterally, ensuring proper demolding. However, if the contact area between the slider core and the product is too large, it can make separation difficult. Currently, the slider core removal is generally linked to the front mold; that is, the slider is pulled outwards simultaneously when the front and rear molds open. In this case, the product's side is exposed and unsupported, and the forced removal of the slider core can cause product deformation. Utility Model Content
[0004] To address the aforementioned problems, this invention provides an injection mold with a side-pulling core.
[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:
[0006] A side-pulling injection mold includes a front mold, a rear mold, and a side-pulling mechanism. The front mold has a front mold core, and the rear mold has a rear mold core. The side-pulling mechanism is mounted on the rear mold and includes a slider, a slider core, a stop, and a locking assembly. The slider and the stop can both slide laterally. The stop, the front mold core, and the rear mold core form an injection cavity. The slider core is fixed to the slider and extends into the injection cavity. The stop and the slider are linked by a delayed linkage. The locking assembly includes a fixing block, an elastic element, and a stop. The fixing block is fixed between the slider and the rear mold core. The stop is telescopically mounted within the fixing block. The elastic element applies a forward supporting force to the stop, causing the stop to block outside the stop. The slider and the stop form a slanted guide fit. When the slider slides outward to a first position, the slanted guide fit structure drives the stop to retract backward, releasing the restriction on the stop. At the first position, the slider is linked with the stop through the delayed linkage structure.
[0007] Furthermore, the outer end of the stop has a relief cavity and abutment bosses on both sides of the relief cavity. The stop block has a first inclined guide surface corresponding to the relief cavity and vertical abutment surfaces on both sides of the first inclined guide surface. The two vertical abutment surfaces of the stop block correspond one-to-one with the two abutment bosses of the stop to achieve abutment and limiting. An action block is provided on the slider. The action block is provided corresponding to the relief cavity. In the mold closing state, the action block is inserted into the relief cavity. The outer end of the action block is provided with a second inclined guide surface, and an oblique guide engagement is formed between the second inclined guide surface and the first inclined guide surface and the stop block.
[0008] Furthermore, the outer end of the stop block is provided with a third inclined guide surface, and the inner end of the action block is provided with a fourth inclined guide surface for forming an inclined guide engagement with the third inclined guide surface.
[0009] Furthermore, the actuating block is secured to the slider by bolts.
[0010] Furthermore, the number of the fastening components is at least two sets, evenly distributed on the outer end of the baffle.
[0011] Furthermore, a retaining spring is provided between the slider and the stop. When the mold is closed, the slider and the stop come into contact and compress the retaining spring.
[0012] Furthermore, the elastic element of the buckle assembly is a support spring.
[0013] Furthermore, the center of the stop is provided with a clearance window, the slider core passes through the clearance window of the stop, and the portion of the stop located on the front side of the slider core at least participates in enclosing and forming the injection cavity.
[0014] Furthermore, the structure in which the stop and the slider form a delayed linkage is as follows: a limiting bolt is passed through the slider, the limiting bolt is fixed on the stop, and the nut of the limiting bolt is spaced apart from the slider. The distance between the nut of the limiting bolt and the slider is the distance between the slider moving outward from the mold closing position to the first position.
[0015] Furthermore, the structure in which the stop and the slider are configured to form a delayed linkage is as follows: the slider is provided with a limiting groove, and the stop is provided with a limiting protrusion extending into the limiting groove. The size of the limiting protrusion is smaller than the size of the limiting groove, and the range of motion of the limiting protrusion within the limiting groove is the distance between the slider moving outward from the mold closing position to the first position.
[0016] The technical solution provided by this utility model has the following beneficial effects:
[0017] This application adds a stop and a locking assembly to the original side-pulling mechanism. The stop, front mold core, and rear mold core form the injection cavity. After the product is injection molded, the stop is located on the side of the product. The stop and the slider are linked in a delayed manner and are restricted by the locking assembly. At the beginning of the core pulling, the slider drives the slider core to pull outward, but the stop remains fixed under the restriction of the locking assembly. At this time, the stop can support the side of the product, preventing deformation caused by the lack of support on the side of the product when the slider core is pulled out. When the slider is pulled outward to the first position, the locking assembly releases the restriction on the stop under the action of the slider. At this time, the continued outward sliding of the slider will drive the stop to move outward together, realizing complete core pulling and ensuring product quality. At the same time, the structure of the locking assembly of this application adopts the cooperation of elastic elements and stops, which ensures reliable operation. Attached Figure Description
[0018] Figure 1 The diagram shown is a partial structural schematic of the injection mold with side core pulling in the embodiment.
[0019] Figure 2 As shown Figure 1 Another perspective view of the structure shown;
[0020] Figure 3 As shown Figure 1 A partially exploded diagram of the structure shown.
[0021] Figure 4 As shown Figure 3 Enlarged view of region A in the middle;
[0022] Figure 5 The figure shown is a cross-sectional view of the lateral core-pulling mechanism in the embodiment;
[0023] Figure 6 As shown Figure 5 Enlarged view of region B in the middle;
[0024] Figure 7 The figure shown is a cross-sectional view of the lateral core-pulling mechanism after the working block is hidden in the embodiment.
[0025] Figure 8 As shown Figure 7 Enlarged view of region C in the middle;
[0026] Figure 9 The diagram shown is a structural schematic of the fastening assembly in the assembled state in the embodiment.
[0027] Figure 10 The diagram shown is an exploded view of the buckle assembly in the embodiment.
[0028] Figure 11 The diagram shown is a schematic representation of the mating structure between the fastening assembly and the actuating block in the embodiment.
[0029] Figure 12 The diagram shown is an exploded view of the fastening assembly and the action block in the embodiment. Detailed Implementation
[0030] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0031] In the description of this invention, terms such as "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0032] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.
[0033] Reference Figures 1 to 12 As shown, this embodiment provides an injection mold with a side core pulling mechanism, including a front mold, a rear mold, and a side core pulling mechanism. The front mold is provided with a front mold core, and the rear mold is provided with a rear mold core 1. The side core pulling mechanism is provided on the rear mold. The direction toward the front mold is defined as front, the direction toward the rear mold is defined as rear, the direction toward the injection cavity is defined as inward, and the direction away from the injection cavity is defined as outward.
[0034] The lateral core-pulling mechanism includes a slider 10, a slider core 20, a stop 30, and a fastening assembly 40. Both the slider 10 and the stop 30 can slide laterally, that is, they slide perpendicular to the front-to-back direction. The stop 30, the front mold core, and the rear mold core 1 form an injection cavity. The stop 30 is located on the side of the front mold core and the rear mold core 1, meaning it forms one side of the injection cavity. The slider core 20 is fixed to the slider 10 and extends into the injection cavity to participate in the product molding. In this embodiment, the slider core 20 is used to mold the side cavity structure of the product. The stop 30 and the slider 10 are configured with delayed linkage, meaning there is relatively independent movement space between the stop 30 and the slider 10. Linkage only occurs when the slider 10 moves a certain distance away from the stop 30.
[0035] The fastening assembly 40 includes a fixing block 41, an elastic element 43, and a stop block 42. The fixing block 41 is fixed between the slider 10 and the rear mold core 1. The stop block 42 is telescopically mounted within the fixing block 41. In this embodiment, the fixing block 41 is provided with a guide hole 411, and the stop block 42 is movably mounted within the guide hole 411 of the fixing block 41. The elastic element 43 applies a forward supporting force to the stop block 42 so that the stop block 42 blocks the outside of the stop frame 30. That is, in the mold-closed state, the stop block 42 protrudes from the fixing block 41 under the action of the elastic element 43 and is located outside the stop frame 30 to restrict the stop frame 30. Figures 3 to 8 As shown.
[0036] The slider 10 and the stop block 42 form an oblique guide engagement. When the slider 10 slides outward to the first position, the oblique guide engagement structure drives the stop block 42 to retract backward, thereby releasing the restriction on the stop frame 30. At the first position, the slider 10 forms a linkage with the stop frame 30 through a delayed linkage structure.
[0037] During mold opening, the slider 10 drives the slider core 20 to pull outwards, but the stop 30 remains fixed under the constraint of the locking assembly 40. At this time, the stop 30 can support the side of the product, preventing deformation caused by the lack of support on the side of the product when the slider core 20 is pulled out. When the slider 10 is pulled outwards to the first position, the locking assembly 40 releases the constraint on the stop 30 under the action of the slider 10. At the same time, the slider 10 forms a linkage with the stop 30 through the delayed linkage structure. At this time, the continued outward sliding of the slider 10 will drive the stop 30 to move outwards together, realizing complete core pulling and ensuring product quality. In addition, the structure of the locking assembly 40 in this application adopts the mutual cooperation of the elastic element 43 and the stop 42, which ensures reliable operation.
[0038] In a further preferred embodiment, the outer end of the stop 30 has a relief cavity 32 and abutment protrusions 33 located on both sides of the relief cavity 32. The stop block 42 has a first inclined guide surface 421 corresponding to the relief cavity 32 and vertical abutment surfaces 422 located on both sides of the first inclined guide surface 421, such as... Figure 4 As shown, the two vertical abutment surfaces 422 of the stop block 42 correspond one-to-one with the two abutment bosses 33 of the stop bracket 30 to achieve abutment and limiting. An action block 11 is provided on the slider 10, corresponding to the relief cavity 32. In the mold-closed state, the action block 11 is inserted into the relief cavity 32. The outer end of the action block 11 is provided with a second inclined guide surface 111, and through the cooperation of the second inclined guide surface 111 and the first inclined guide surface 421, an oblique guide cooperation is formed between the action block 42 and the stop block 42. Figure 6As shown, when the core is pulled outward in the mold-closed state, the slider 10 moves the actuating block 11 outward together. The second inclined guide surface 111 of the actuating block 11 engages with the first inclined guide surface 421 of the stop block 42. As the actuating block 11 gradually moves outward, it drives the stop block 42 to retract backward against the force of the elastic element 43. When the slider 10 moves to the first position, the stop block 42 retracts completely, thereby releasing the restriction on the stop frame 30. Furthermore, through the design of the above structure, the force on the stop block 42 is relatively uniform, and it is not easy to jam.
[0039] When the slider 10 moves to its outermost position, the actuating block 11 and the stop 30 disengage from the stop block 42. At this time, the stop block 42 extends forward again under the action of the elastic element 43. When the mold is closed, the stop 30 and the actuating block 11 need to move inward past the stop block 42 again. For this purpose, in this embodiment, the outer end of the stop block 42 is also provided with a third inclined guide surface 423, and the inner end of the actuating block 11 is provided with a fourth inclined guide surface 112 for forming an inclined guide engagement with the third inclined guide surface 423. With this configuration, when the mold is closed, the slider 10 drives the actuating block 11 to move inward, and the fourth inclined guide surface 112 of the actuating block 11 engages with the third inclined guide surface 423 of the stop block 42 to drive the stop block 42 to retract backward, thereby making room. After the mold is closed, the stop block 42 extends again under the action of the elastic element 43 to restrict the stop 30. Of course, in other embodiments, if the stop block 42 is always pressed by the action block 11 or the stop bracket 30 in the mold-open state, then there is no need to design the mating structure of the third inclined guide surface 423 and the fourth inclined guide surface 112.
[0040] The actuating block 11 is bolted to the slider 10, making it detachable for easy replacement and maintenance. Alternatively, in other embodiments, the actuating block 11 can be integrally connected to the slider 10.
[0041] The number of the fastening components 40 is at least two sets, and in this embodiment there are two sets, which are evenly distributed on the outer end of the baffle 30, so that the limiting effect on the baffle 30 is more uniform.
[0042] The elastic element 43 of the buckle assembly 40 is a support spring, which has a simple structure and is easy to implement.
[0043] A retaining spring 12 is also provided between the slider 10 and the stop 30. When the mold is closed, the slider 10 and the stop 30 are in contact and compress the retaining spring 12. With the addition of the retaining spring 12, when the slider 10 just begins to be pulled outward, the stop 30 is not only kept fixed by the restraint of the fastening assembly 40, but also by the elastic force applied to the stop 30 by the retaining spring 12, further ensuring the stability of the stop 30. Of course, in other embodiments, the retaining spring 12 may not be used.
[0044] The stop 30 has a clearance window 31 at its center. The slider core 20 passes through the clearance window 31 of the stop 30. The portion of the stop 30 located in front of the slider core 20 at least participates in forming the injection cavity. That is, when the mold opens, since the product is still on the rear mold core 1 and the front mold core is separated from the product, the stop 30 can at least abut against the front side of the product to stabilize the product's position. Of course, in other embodiments, the side of the injection cavity can also be entirely formed by the stop 30.
[0045] Furthermore, in this embodiment, the delayed linkage between the stop 30 and the slider 10 is configured as follows: a limiting bolt passes through the slider 10 and is fixed to the stop 30. The nut of the limiting bolt is spaced apart from the slider 10, and the distance between the nut of the limiting bolt and the slider 10 is the distance the slider 10 travels from the mold-closed position to the first position. When the slider 10 moves outward from the mold-closed position to the first position, the nut of the limiting bolt also abuts against the slider 10. Afterward, the slider 10 continues to move outward, causing the stop 30 to move outward together with the limiting bolt for core extraction. This configuration is simple in structure.
[0046] Of course, in other embodiments, the delayed linkage between the stop 30 and the slider 10 can also be achieved as follows: the slider 10 is provided with a limiting groove, and the stop 30 is provided with a limiting protrusion extending into the limiting groove. The size of the limiting protrusion is smaller than the size of the limiting groove, and the range of motion of the limiting protrusion within the limiting groove is the distance the slider 10 travels from the mold-closed position to the first position. When the slider 10 moves outward from the mold-closed position to the first position, the limiting protrusion abuts against the groove wall of the limiting groove. Afterward, the slider 10 continues to move outward, pulling the stop 30 outward together through the limiting protrusion to achieve core pulling. Alternatively, other structures can be used to achieve the delayed linkage between the stop 30 and the slider 10.
[0047] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.
Claims
1. An injection mold with a side core-pulling mechanism, comprising a front mold, a rear mold, and a side core-pulling mechanism, wherein the front mold is provided with a front mold core, the rear mold is provided with a rear mold core, and the side core-pulling mechanism is disposed on the rear mold, characterized in that: The lateral core-pulling mechanism includes a slider, a slider core, a stop, and a locking assembly. Both the slider and the stop can be laterally slidable. The stop, the front mold core, and the rear mold core form an injection cavity. The slider core is fixed on the slider and extends into the injection cavity. The stop and the slider are linked by a delayed linkage. The locking assembly includes a fixing block, an elastic element, and a stop. The fixing block is fixed between the slider and the rear mold core. The stop is telescopically mounted in the fixing block. The elastic element applies a forward supporting force to the stop, causing the stop to block outside the stop. The slider and the stop form a slanted guide fit. When the slider slides outward to the first position, the slanted guide fit structure drives the stop to retract backward, releasing the restriction on the stop. At the first position, the slider is linked with the stop through the delayed linkage structure.
2. The injection mold with lateral core pulling of claim 1, wherein: The outer end of the stop has a relief cavity and abutment bosses on both sides of the relief cavity. The stop block has a first inclined guide surface corresponding to the relief cavity and vertical abutment surfaces on both sides of the first inclined guide surface. The two vertical abutment surfaces of the stop block correspond one-to-one with the two abutment bosses of the stop to achieve abutment and limiting. An action block is provided on the slider. The action block is provided corresponding to the relief cavity. In the mold closing state, the action block is inserted into the relief cavity. The outer end of the action block is provided with a second inclined guide surface, and an inclined guide fit is formed between the second inclined guide surface and the first inclined guide surface and the stop block.
3. The injection mold with lateral core pulling of claim 2, wherein: The outer end of the stop block is also provided with a third inclined guide surface, and the inner end of the action block is provided with a fourth inclined guide surface for forming an inclined guide engagement with the third inclined guide surface.
4. The injection mold with lateral core pulling of claim 2, wherein: The actuating block is secured to the slider by bolts.
5. An injection mold with lateral core pulling according to any one of claims 2 to 4, characterized in that: The number of the fastening components is at least two sets, which are evenly distributed on the outer end of the baffle.
6. The injection mold with lateral core pulling of claim 1, wherein: A retaining spring is also provided between the slider and the stop. When the mold is closed, the slider and the stop are in contact and compress the retaining spring.
7. The injection mold with lateral core pulling of claim 1, wherein: The elastic element of the fastening assembly is a support spring.
8. The injection mold with side core pulling according to claim 1, characterized in that: The center of the baffle is provided with a clearance window, and the slider core passes through the clearance window of the baffle. The portion of the baffle located on the front side of the slider core at least participates in enclosing and forming the injection cavity.
9. The injection mold with lateral core pulling of claim 1, wherein: The structure in which the stop and the slider are linked in a delayed manner is as follows: a limiting bolt is passed through the slider and fixed to the stop. The nut of the limiting bolt is spaced apart from the slider. The distance between the nut of the limiting bolt and the slider is the distance between the slider moving outward from the mold closing position to the first position.
10. The injection mold with lateral core pulling of claim 1, wherein: The structure in which the stop and the slider are linked in a delayed manner is as follows: the slider is provided with a limiting groove, and the stop is provided with a limiting protrusion that extends into the limiting groove. The size of the limiting protrusion is smaller than the size of the limiting groove, and the range of motion of the limiting protrusion within the limiting groove is the distance between the slider moving outward from the mold closing position to the first position.