Secondary core-pulling injection mold
By designing the injection mold for secondary core extraction, the combination of the line insert, sliding insert and elastic locking components is solved, and the problem of hardness of the product with inverted structure is difficult to remove the core at one time, achieving the smooth mold release of the product and the improvement of the yield.
Patent Information
- Application Number
- CN202421470876.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-06-25
AI Technical Summary
Products with inverted structures are difficult to release mold through a single core extraction, and it is easy to cause product strain during the demolding process, affecting the appearance and functional size of the product, and reducing product yield.
Design a secondary core-pull injection mold, including the front and rear templates, row position assembly and elastic lock assembly. Through the cooperation of the row insert and the sliding insert, the elastic locking assembly limits the sliding of the limit seat, achieving the secondary core removal of the product.
The injection mold of secondary core extraction achieves smooth mold release of the product, avoiding strains of the product during the mold release process, thereby improving product yield.
Smart Images
Figure CN222807505U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold with secondary core pulling. Background Art
[0002] In the production of injection molds, the appearance of products is becoming more and more diverse and complex. Many products have undercut structures, such as L-shaped undercut structures.
[0003] Due to its special undercut structure, it is very difficult to demould this type of product by core pulling in one go. Even if demoulding is completed by core pulling in one go, the product will be torn during the demoulding process, affecting its appearance and functional dimensions, thereby reducing the product yield.
[0004] Therefore, during product production, demoulding cannot be performed simply by pulling the core once. It is necessary to design a structure for smooth demoulding of this type of product so that the product can be demoulded smoothly and intact. Utility Model Content
[0005] The utility model aims to provide an injection mold with secondary core pulling to solve the problem that products with undercut structures are difficult to demould through one core pulling.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A secondary core-pulling injection mold comprises a front template and a rear template, a mold cavity for molding products is arranged between the front template and the rear template, the secondary core-pulling injection mold also comprises a slider assembly and an elastic locking assembly, the slider assembly comprises a slider seat, a limit seat, a slider insert and a sliding insert, the slider seat and the limit seat are slidably arranged on the rear template, the slider seat is movably connected to the limit seat, the slider insert transversely penetrates the limit seat and one end of the slider insert is installed on the slider seat, the slider insert has a driving inclined surface, the sliding insert is slidably arranged on the driving inclined surface and one end of the sliding insert is installed on the limit seat, the slider seat is provided with a guiding inclined hole, and the front template is provided with an inclined hole matching the guiding inclined hole Guide column, the front template pushes the sliding seat through the inclined guide column, the elastic locking assembly is arranged on the rear template and is located below the sliding seat, the elastic locking assembly is used to limit the sliding of the limit seat, the sliding insert is installed with an abutment block, and the abutment block is used to release the restriction of the elastic locking assembly on the sliding of the limit seat; the front template, the rear template, the limit seat, the sliding insert and the sliding insert together form a mold cavity; when the mold is opened, the sliding seat drives the sliding insert to move downward and away from the product through the sliding insert, and when the abutment block abuts the elastic locking assembly, the abutment block releases the restriction on the sliding of the limit seat, and the sliding seat drives the sliding insert, the limit seat and the sliding insert to move outward to complete the product demolding.
[0008] Furthermore, the rear template is recessed with an installation groove that can accommodate an elastic locking assembly. The elastic locking assembly includes a locking block and a return spring. The locking block and the return spring are both arranged in the installation groove. The two ends of the return spring respectively press against the locking block and the bottom wall of the installation groove. The locking block can protrude out of the installation groove to limit the sliding of the limit seat.
[0009] Furthermore, an avoidance groove is concavely provided on the lower surface of the sliding seat corresponding to the locking block, and the locking block can partially protrude from the avoidance groove to abut against the limiting seat.
[0010] Furthermore, the locking block has a locking portion, which is used to press against the limiting seat; when the locking block partially protrudes out of the avoidance groove, the locking portion presses against a side of the limiting seat facing the traveling seat.
[0011] Furthermore, the locking block is provided with a first abutting inclined surface matched with the abutting block, and the abutting block abuts against the first abutting inclined surface and presses the locking block downward to release the restriction on the sliding of the limiting seat.
[0012] Furthermore, the sliding insert has a transmission inclined surface, and the driving inclined surface matches the transmission inclined surface.
[0013] Furthermore, the slide insert is provided with a slide rail on the driving inclined surface, and the slide insert is provided with a slide groove on the transmission inclined surface corresponding to the slide rail, and the slide groove cooperates with the slide rail.
[0014] Furthermore, the sliding seat and the limit seat are movably connected through a connecting rod, one end of the connecting rod is movably set on the sliding seat, and the other end of the connecting rod is fixedly set on the limit seat; when opening the mold, the sliding seat drives the limit seat to move outward through the connecting rod.
[0015] Furthermore, the limit seat is provided with a movable hole along the moving direction of the position insert, the position insert is movably arranged in the movable hole, a limit protrusion is convexly provided on the position insert, the limit seat is provided with a limit groove in the movable hole, and the limit protrusion cooperates with the limit groove.
[0016] Furthermore, a movable groove is provided in the horizontal direction of the limiting seat corresponding to the abutting block, and the movable groove is connected to the movable hole.
[0017] The beneficial effects of the secondary core-pulling injection mold of the utility model are as follows:
[0018] By cooperating the position insert with the sliding insert and limiting the sliding of the limit seat with the elastic locking assembly, the position insert is separated from the product while driving the sliding insert to move downward, thus realizing the first core pulling of the injection mold with secondary core pulling; by cooperating the abutment block with the elastic locking assembly, the abutment block releases the restriction on the sliding of the limit seat, and the sliding insert is completely separated from the product, thus realizing the second core pulling of the injection mold with secondary core pulling. Therefore, the injection mold with secondary core pulling is not only simple in structure, but also can realize smooth demoulding of the product through secondary core pulling, and can avoid the product from being strained during the demoulding process, thus improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a cross-sectional view of the closed mold state of the injection mold for secondary core pulling of the utility model.
[0020] Figure 2 It is a cross-sectional view of the mold opening process of the injection mold with secondary core pulling of the utility model.
[0021] Figure 3 It is a cross-sectional view of the mold opening state of the injection mold for secondary core pulling of the utility model.
[0022] Figure 4 for Figure 1 Enlarged cross-sectional view of point A in the middle.
[0023] Figure 5 for Figure 1 A perspective view of the locking block is shown.
[0024] Figure 6 for Figure 1 A perspective view of the abutment block is shown.
[0025] Figure 7 for Figure 1 A perspective view of the slide insert is shown.
[0026] Figure 8 for Figure 1 A perspective view of the sliding insert is shown.
[0027] Fig. 9 for Figure 1 A three-dimensional view of the limit seat shown.
[0028] Fig.10 for Figure 1 The schematic diagram of the mold closing state of the sliding seat and the limit seat is shown.
[0029] Fig.11 for Figure 2 The schematic diagram of the mold opening process of the sliding seat and the limit seat is shown.
[0030] Fig.12 for Figure 3Schematic diagram of the limit seat and locking block in the mold opening state. DETAILED DESCRIPTION
[0031] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0032] The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal", etc. in the specification and claims of the utility model indicate directions or position relationships based on the directions or position relationships shown in the drawings, and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore cannot be understood as limitations on the present application.
[0033] See also Figure 1-Figure 3 and Figure 7 A secondary core-pulling injection mold comprises a front template 10 and a rear template 20, wherein a mold cavity 100 for molding a product is provided between the front template 10 and the rear template 20. The secondary core-pulling injection mold further comprises a slide assembly 30 and an elastic locking assembly 40.
[0034] The slider assembly 30 includes a slider seat 31, a limit seat 33, a slider insert 32 and a sliding insert 34. The slider seat 31 and the limit seat 33 are slidably arranged on the rear template 20, and the slider seat 31 is movably connected with the limit seat 33; the slider insert 32 transversely penetrates the limit seat 33 and one end of the slider insert 32 is mounted on the slider seat 31, the slider insert 32 has a driving inclined surface 322, and the sliding insert 34 is slidably arranged on the driving inclined surface 322 and one end of the slider insert 34 is mounted on the limit seat 33. The limit seat 33 can drive the sliding insert 34 to move transversely so as to be separated from the product.
[0035] The slider seat 31 is provided with an inclined guiding hole 311 , and the front template 10 is provided with an inclined guiding column 11 matched with the inclined guiding hole 311 . The front template 10 pushes the slider seat 31 through the inclined guiding column 11 .
[0036] The elastic locking assembly 40 is arranged on the rear template 20 and is located below the sliding seat 31. The elastic locking assembly 40 is used to limit the sliding of the limit seat 33. The sliding insert 32 is equipped with an abutment block 321, and the abutment block 321 is used to release the restriction of the elastic locking assembly 40 on the sliding of the limit seat 33.
[0037] The front template 10 , the rear template 20 , the limiting seat 33 , the positioning insert 32 , and the sliding insert 34 together form the mold cavity 100 .
[0038] When the mold is opened, the slider seat 31 drives the sliding insert 34 to move downward and away from the product through the slider insert 32. When the abutment block 321 abuts against the elastic locking assembly 40, the abutment block 321 releases the restriction on the sliding of the limit seat 33, and the slider seat 31 drives the slider insert 32, the limit seat 33, and the sliding insert 34 to move outward to complete the product demolding.
[0039] From the above, the secondary core-pulling injection mold proposed by the utility model, through the cooperation of the position insert 32 and the sliding insert 34, and the elastic locking component 40 to limit the sliding of the limit seat 33, the position insert 32 is separated from the product while driving the sliding insert 34 to move downward, thereby realizing the first core-pulling of the secondary core-pulling injection mold; through the cooperation of the abutment block 321 and the elastic locking component 40, the abutment block 321 releases the restriction on the sliding of the limit seat 33, and the sliding insert 34 is completely separated from the product, thereby realizing the second core-pulling of the secondary core-pulling injection mold. Therefore, the secondary core-pulling injection mold is not only simple in structure, but also can realize smooth demoulding of the product through secondary core-pulling, and can avoid the product from being strained during the demoulding process, thereby improving the product yield.
[0040] See also Figure 4 The rear template 20 is concavely provided with a mounting groove 21 for accommodating the elastic locking assembly 40, and the elastic locking assembly 40 is arranged in the mounting groove 21. The elastic locking assembly 40 includes a locking block 41 and a return spring 42, and the locking block 41 and the return spring 42 are both arranged in the mounting groove 21. The two ends of the return spring 42 respectively abut against the locking block 41 and the bottom wall of the mounting groove 21, and the locking block 41 can protrude from the mounting groove 21 to limit the sliding of the limit seat 33.
[0041] Furthermore, the sliding seat 31 is provided with an avoidance groove 312 on the lower surface corresponding to the locking block 41 , and the locking block 41 can partially protrude from the avoidance groove 312 to abut against the limiting seat 33 , thereby limiting the sliding of the limiting seat 33 by the locking block 41 .
[0042] For more details, see Figure 4-Figure 5 The locking block 41 has a locking portion 411, and the locking portion 411 is used to press against the limit seat 33; when the locking block 41 partially protrudes from the avoidance groove 312, the locking portion 411 presses against a side of the limit seat 33 facing the sliding seat 31, thereby limiting the sliding of the limit seat 33.
[0043] See also Figure 5-Figure 6The locking block 41 is provided with a first abutting inclined surface 412 that matches with the abutting block 321. The abutting block 321 abuts against the first abutting inclined surface 412 and presses the locking block 41 downward to release the restriction on the sliding of the limit seat 33. The abutting block 321 is provided with a second abutting inclined surface 3211 corresponding to the first abutting inclined surface 412. The second abutting inclined surface 3211 matches with the first abutting inclined surface 412. The second abutting inclined surface 3211 abuts against the first abutting inclined surface 412, so that the process of the abutting block 321 abutting against and pressing the locking block 41 downward is smoother.
[0044] See also Figure 3 and Fig.12 When the mold is opened, after the abutting block 321 abuts against and presses the locking block 41 downward, the abutting block 321 no longer restricts the movement of the limit seat 33, and the limit seat 33 moves outward with the sliding seat 31, and the locking block 41 abuts against the lower surface of the limit seat 33.
[0045] See also Figure 2 and Figure 8 The sliding insert 34 has a transmission slope 341, and the driving slope 322 cooperates with the transmission slope 341. Since one end of the sliding insert 34 is mounted on the limit seat 33, the limit seat 33 restricts the sliding insert 34 from following the movement of the driving slope 322 under the action of friction, and through the cooperation between the driving slope 322 and the transmission slope 341, when the mold is opened, the sliding insert 34 slides relatively along the driving slope 322 while the limit seat 33 is still restricted from sliding, so that the sliding insert 34 moves downward to complete the first core pulling and detach from one side of the product.
[0046] For further information, see Figure 7-Figure 8 The slide insert 32 is provided with a slide rail 323 on the driving inclined surface 322, and the slide insert 34 is provided with a slide groove 342 on the transmission inclined surface 341 corresponding to the slide rail 323, and the slide groove 342 cooperates with the slide rail 323. The slide groove 342 and the slide rail 323 make the slide insert 34 slide more smoothly on the slide insert 32. In this embodiment, the cross section of the slide rail 323 is T-shaped, and the slide groove 342 is T-shaped.
[0047] See also Figure 10-11 The slider seat 31 is movably connected to the limit seat 33 via a connecting rod 35, one end of the connecting rod 35 is movably arranged on the slider seat 31, and the other end of the connecting rod 35 is fixedly arranged on the limit seat 33. When the mold is opened, the slider seat 31 drives the limit seat 33 to move outward through the connecting rod 35.
[0048] Furthermore, the slider seat 31 has a connecting hole 313 extending transversely therethrough corresponding to the connecting rod 35, and the connecting rod 35 is movably disposed in the connecting hole 313. A stopper 314 for pushing the connecting rod 35 is convexly disposed in the connecting hole 313, and the connecting rod 35 is provided with an abutment portion 351 matched with the stopper 314.
[0049] See also Fig.10 In the mold closing state, the abutting portion 351 is located at a side of the abutting top portion 314 away from the slide insert 32 , and there is a certain distance between the abutting portion 351 and the abutting top portion 314 .
[0050] When the mold is opened, the limit seat 33 is still restricted from sliding, and the sliding seat 31 moves outward, so that the abutting top portion 314 gradually approaches the abutting portion 351. Figure 2 and Fig.11 When the abutting block 321 abuts against and presses the locking block 41 downward into the installation groove 21, the abutting top portion 314 abuts against the abutting portion 351; then, the abutting top portion 314 abuts against the abutting portion 351 to push the connecting rod 35, so that the sliding seat 31 drives the limiting seat 33 to move outward.
[0051] See also Figure 7 and Fig. 9 The limit seat 33 is provided with a movable hole 331 along the moving direction of the position insert 32, and the position insert 32 is movably arranged in the movable hole 331. A limit protrusion 324 is convexly provided on the position insert 32, and the limit seat 33 is provided with a limit groove 332 in the movable hole 331. The limit protrusion 324 cooperates with the limit groove 332, and the limit protrusion 324 makes the position insert 32 more stable when the movable hole 331 moves.
[0052] The limiting seat 33 is provided with a movable groove 333 in a transverse direction corresponding to the abutting block 321 . The movable groove 333 is connected to the movable hole 331 . When the mold is opened, the abutting block 321 moves outward along the movable groove 333 to cooperate with the locking block 41 .
[0053] The utility model has the beneficial effects of a secondary core-pulling injection mold: not only is the structure simple, but also the secondary core-pulling is used to realize smooth demoulding of the product, and the product is prevented from being strained during the demoulding process, thereby improving the product yield.
[0054] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A secondary core-pulling injection mold, comprising a front mold plate and a rear mold plate, wherein a mold cavity for molding a product is provided between the front mold plate and the rear mold plate, characterized in that: The secondary core-pulling injection mold also includes a slide assembly, an elastic locking assembly, the slide assembly includes a slide seat, a limit seat, a slide insert and a sliding insert, the slide seat and the limit seat are slidably arranged on the rear template, the slide seat and the limit seat are movably connected, the slide insert transversely passes through the limit seat and one end of which is installed on the slide seat, the slide insert has a driving inclined surface, the sliding insert is slidably arranged on the driving inclined surface and one end of which is installed on the limit seat, the slide seat is provided with a guiding inclined hole, the front template is provided with an inclined guide column matching the guiding inclined hole, and the front template pushes the slide seat through the inclined guide column, the elastic locking assembly is arranged on the rear template and is located below the slide seat, the elastic locking assembly is used to limit the sliding of the limit seat, and the slide insert is provided with an abutment block, and the abutment block is used to release the restriction of the elastic locking assembly on the sliding of the limit seat; The front template, the rear template, the limit seat, the position insert, and the sliding insert together form the mold cavity; When the mold is opened, the sliding seat drives the sliding insert to move downward and away from the product through the sliding insert. When the abutment block abuts against the elastic locking assembly, the abutment block releases the restriction on the sliding of the limit seat, and the sliding seat drives the sliding insert, the limit seat and the sliding insert to move outward to complete the product demoulding.
2. The secondary core-pulling injection mold according to claim 1, characterized in that: The rear template is recessed with an installation groove that can accommodate the elastic locking assembly. The elastic locking assembly includes a locking block and a return spring. The locking block and the return spring are both arranged in the installation groove. The two ends of the return spring respectively abut the locking block and the bottom wall of the installation groove. The locking block can protrude out of the installation groove to limit the sliding of the limit seat.
3. The secondary core-pulling injection mold according to claim 2, characterized in that: The sliding seat is provided with an escape groove on the lower surface corresponding to the locking block, and the locking block can partially protrude from the escape groove to abut against the limiting seat.
4. The secondary core-pulling injection mold according to claim 3, characterized in that: The locking block has a locking portion, and the locking portion is used to abut against the limiting seat; when the locking block partially protrudes from the avoidance groove, the locking portion abuts against a side of the limiting seat facing the sliding seat.
5. The secondary core-pulling injection mold according to claim 2, characterized in that: The locking block is provided with a first abutting inclined surface matched with the abutting block, and the abutting block abuts against the first abutting inclined surface and presses the locking block downward to release the restriction on the sliding of the limiting seat.
6. The secondary core-pulling injection mold according to claim 1, characterized in that: The sliding insert has a transmission inclined surface, and the driving inclined surface matches the transmission inclined surface.
7. The secondary core-pulling injection mold according to claim 6, characterized in that: The slide insert is provided with a slide rail on the driving inclined surface, and the slide insert is provided with a slide groove on the transmission inclined surface corresponding to the slide rail, and the slide groove matches the slide rail.
8. The secondary core-pulling injection mold according to claim 1, characterized in that: The traveling seat and the limiting seat are movably connected via a connecting rod, one end of the connecting rod is movably arranged on the traveling seat, and the other end of the connecting rod is fixedly arranged on the limiting seat; the traveling seat can drive the limiting seat to move outward via the connecting rod.
9. The secondary core-pulling injection mold according to claim 1, characterized in that: The limit seat is provided with a movable hole along the moving direction of the position insert, the position insert is movably arranged in the movable hole, a limit protrusion is convexly provided on the position insert, the limit seat is provided with a limit groove in the movable hole, and the limit protrusion cooperates with the limit groove.
10. The secondary core-pulling injection mold according to claim 9, characterized in that: The limit seat is provided with a movable groove in a transverse direction corresponding to the abutment block, and the movable groove is communicated with the movable hole.