Rotary mold stripping mold

Abstract

The utility model discloses a rotary demolding mold, and relates to the technical field of injection molds, the rotary demolding mold comprises a shell, an outer mold core and an inner mold core; the outer mold core is rotationally connected to the shell, and a cavity used for forming the special-shaped nut is formed between the outer mold core and the inner mold core. The inner mold core is arranged in the shell in a sliding mode and comprises a threaded inner mold core and a clamping block inner mold core, the threaded inner mold core is used for forming a threaded part of the special-shaped nut, and the clamping block inner mold core is used for forming a clamping block of the special-shaped nut; and the driving assembly is used for driving the outer mold core and the inner mold core to act. The special-shaped nut demolding device has the effect of facilitating demolding of the special-shaped nut when the special-shaped nut is produced.

Description

Technical Field

[0001] This application relates to the technical field of injection molds, and particularly to a rotary demolding mold. Background Art

[0002] The rear mold thread-rolling demolding injection mold is an injection mold used for producing plastic products with internal threads. This mold is particularly suitable for situations where threads need to be formed inside the product, such as when manufacturing bottle caps, screw fittings, or other plastic parts that require internal thread connections. In traditional injection molds, the demolding process of products with internal threads is complex, and it is difficult to ensure that the product does not stick to the slider and achieve automatic shedding, which easily damages the product and reduces the product qualification rate.

[0003] To solve this problem, the rear mold thread-rolling demolding injection mold adopts an innovative structure, and its core components include a front mold assembly, a mold core assembly, and a rear mold assembly. The mold core assembly consists of a front mold core and a rear mold core, which together form an injection cavity for the injection molding of products. The rear mold core is further divided into a first rear mold core block and a second rear mold core block, which are arranged side by side on the rear side of the front mold core. The rear mold assembly contains a thread-rolling mechanism, which consists of a thread-rolling shaft, a gear assembly, and a rack assembly. The gear assembly is connected to the thread-rolling shaft, and the rack assembly meshes with the gear assembly to drive the gear assembly to rotate, thereby driving the thread-rolling shaft to rotate and achieve demolding.

[0004] The Chinese patent document with the authorization announcement number CN218139579U in the related art discloses a rear mold thread-rolling demolding injection mold, including a front mold assembly, a mold core assembly, and a mold core assembly located between the front mold assembly and the rear mold assembly. The mold core assembly includes a front mold core and a rear mold core, and the front mold core and the rear mold core together form an injection cavity for the injection molding of products. The rear mold core includes a first rear mold core block and a second rear mold core block, and the first rear mold core block and the second rear mold core block are arranged side by side on the rear side of the front mold core; the rear mold assembly includes a thread-rolling mechanism, and the thread-rolling mechanism includes a thread-rolling shaft, a gear assembly, and a rack assembly. The gear assembly is connected to the thread-rolling shaft, and the rack assembly meshes with the gear assembly to drive the gear assembly to rotate and drive the thread-rolling shaft to rotate, solving the problems of complex structure and inconvenient demolding of the existing injection molds.

[0005] However, when producing special-shaped nuts, the inside of the nut is not all threaded, and the nut has some special structures. Refer to Figure 1 and Figure 2 , the special-shaped nut includes a housing, a plurality of clamping blocks, and a plurality of threaded parts. The housing is in the shape of a top hat and has a regular hexagon cross-section. The housing is provided with a connecting groove, and a plurality of clamping grooves are formed around the connecting groove. The clamping blocks and the threaded parts are both arranged in a circumferential array inside the connecting groove, and the clamping blocks are arranged between adjacent threaded parts.

[0006] Due to the existence of the locking block, the traditional rear mold screw-thread core-pulling injection mold cannot achieve the demolding of the special-shaped nut by the relative rotation of two mold cores. Summary of the Invention

[0007] In order to facilitate the demolding of the special-shaped nut during the production of the special-shaped nut, the present application provides a rotary demolding mold.

[0008] The present application provides a rotary demolding mold, adopting the following technical solutions:

[0009] A rotary demolding mold, comprising:

[0010] A housing, an outer mold core and an inner mold core;

[0011] The outer mold core is rotatably connected to the housing, and a cavity for forming a special-shaped nut is formed between the outer mold core and the inner mold core;

[0012] The inner mold core is slidably arranged in the housing, and includes a threaded inner mold core and a locking-block inner mold core. The threaded inner mold core is used for forming the threaded part of the special-shaped nut, and the locking-block inner mold core is used for forming the locking block of the special-shaped nut;

[0013] A driving assembly, which is used to drive the outer mold core and the inner mold core to act.

[0014] By adopting the above technical solutions, the design of the outer mold core and the inner mold core is adopted. Among them, the outer mold core is rotatably connected to the housing, while the inner mold core is slidably arranged in the housing. This design allows the mold to achieve more flexible actions during the demolding process, especially for special-shaped nuts with complex internal structures such as locking blocks; through the combined actions of rotation and sliding, the mold can achieve a more stable and precise demolding process, reducing the possibility of product adhesion and damage, thereby improving production efficiency and the qualified rate of products.

[0015] Optionally, the driving assembly includes a driving member, a driving rack and a driven gear. The driven gear is coaxially and fixedly connected to the outer mold core. The driving rack is slidably arranged in the housing and meshes with the driven gear. The output end of the driving member is fixedly connected to the driving rack.

[0016] By adopting the above technical solutions, the driving assembly is composed of a driving member, a driving rack and a driven gear. This design provides an effective power transmission mechanism, enabling the driving assembly to control the rotation of the outer mold core and making the actions of the mold more precise and controllable.

[0017] Optionally, a roller is rotatably connected to the driving rack.

[0018] By adopting the above technical solutions, the roller can reduce the wear of the driving rack during movement and improve the smoothness of the driving rack during movement.

[0019] Optionally, a plurality of the outer mold cores and the inner mold cores are provided, and the outer mold cores and the inner mold cores are arranged in one-to-one correspondence.

[0020] By adopting the above technical solution, by providing a plurality of outer mold cores and inner mold cores, the mold can produce a plurality of special-shaped nuts simultaneously, significantly improving the production efficiency.

[0021] Optionally, the outer mold cores and the inner mold cores are both provided with two rows, two driving components are provided, a plurality of driven gears of the driving components are correspondingly provided for one row of the outer mold cores, and the driving rack of one driving component meshes with a plurality of driven gears in one row.

[0022] By adopting the above technical solution, the driving rack of one driving component meshes with a plurality of driven gears in one row, thereby realizing precise control of the synchronous movement of each row of mold cores. This design not only improves the automation degree of the mold but also ensures the coordination and stability of the mold operation.

[0023] Optionally, a ejector rod is slidably arranged on the housing, and the ejector rod is used to eject the special-shaped nut from the inner mold core.

[0024] By adopting the above technical solution, the function of these ejector rods is to eject the special-shaped nut from the inner mold core. This design allows the mold to more effectively separate the formed special-shaped nut during the demolding process, improving the demolding efficiency and reducing damage to the product.

[0025] Optionally, a plurality of the ejector rods are provided, and the plurality of ejector rods are slidably connected to the inner mold core, and the ejector rods penetrate through the inner mold core.

[0026] By adopting the above technical solution, the arrangement of a plurality of ejector rods can make the ejection force on the special-shaped nut during demolding more uniform, avoiding product deformation or damage caused by excessive local force.

[0027] Optionally, the plurality of ejector rods are arranged around the inner mold core.

[0028] By adopting the above technical solution, by arranging a plurality of ejector rods around the inner mold core, the ejection force can be more evenly distributed, avoiding product deformation or damage caused by excessive local force and ensuring the smoothness during demolding.

[0029] In summary, the present application includes at least one of the following beneficial effects:

[0030] 1. The design of the outer mold core and the inner mold core is adopted, where the outer mold core is rotatably connected to the housing, and the inner mold core is slidably arranged in the housing. This design allows the mold to achieve more flexible movements during the demolding process, especially for special-shaped nuts with complex internal structures such as clamping blocks; through the combined actions of rotation and sliding, the mold can achieve a more stable and precise demolding process, reducing the possibility of product adhesion and damage, thereby improving production efficiency and the qualified rate of products;

[0031] 2. The driving assembly consists of a driving member, a driving rack, and a driven gear. This design provides an effective power transmission mechanism, enabling the driving assembly to control the rotation of the outer mold core and making the actions of the mold more precise and controllable;

[0032] 3. By setting multiple outer mold cores and inner mold cores, the mold can produce multiple special-shaped nuts simultaneously, significantly improving production efficiency;

[0033] 4. The setting of multiple ejector rods can make the ejection force on the special-shaped nut during demolding more uniform, avoiding product deformation or damage caused by excessive local stress. Description of the Drawings

[0034] Figure 1 is a schematic diagram showing the overall structure of the special-shaped nut in this application;

[0035] Figure 2 is a sectional structure schematic diagram showing the internal structure of the special-shaped nut in this application;

[0036] Figure 3 is a schematic diagram showing the overall structure of the embodiment of this application;

[0037] Figure 4 is a front view structure schematic diagram of the embodiment of this application;

[0038] Figure 5 is Figure 4 the sectional structure schematic diagram at A - A in;

[0039] Figure 6 is a side view structure schematic diagram of the embodiment of this application;

[0040] Figure 7 is Figure 6 the sectional structure schematic diagram at B - B in;

[0041] Figure 8 is a partial structure schematic diagram showing the relative position between the special-shaped nut and the inner mold core in the embodiment of this application;

[0042] Figure 9 is a partial structure schematic diagram showing the inner mold core in the embodiment of this application.

[0043] Description of the Reference Numerals:

[0044] 2. Special-shaped nut; 21. Outer shell; 22. Connecting groove; 23. Card slot; 24. Card block; 25. Threaded part;

[0045] 3. Housing;

[0046] 4. Outer mold core;

[0047] 5. Inner mold core; 51. Threaded inner mold core; 52. Card block inner mold core;

[0048] 6. Driving assembly; 61. Driving part; 62. Active rack; 63. Driven gear; 64. Roller;

[0049] 7. Ejector rod;

[0050] 8. Outer mold core mounting plate;

[0051] 9. Inner mold core mounting plate. Specific implementation mode

[0052] The rear mold thread-cutting and core-pulling injection mold is an injection mold used for producing plastic products with internal threads. This mold is particularly suitable for situations where threads need to be formed inside the product, such as when manufacturing bottle caps, screw fittings, or other plastic parts that require internal thread connections. In traditional injection molds, the demolding process of products with internal threads is complex, and it is difficult to ensure that the products do not stick to the sliders and achieve automatic shedding, which is likely to damage the products and reduce the product qualification rate.

[0053] To solve this problem, the rear mold thread-cutting and core-pulling injection mold adopts an innovative structure, and its core components include a front mold assembly, a mold core assembly, and a rear mold assembly. The mold core assembly consists of a front mold core and a rear mold core, which together form an injection cavity for the injection molding of the product. The rear mold core is further divided into a first rear mold core block and a second rear mold core block, which are arranged side by side on the rear side of the front mold core. The rear mold assembly contains a thread-cutting mechanism, which consists of a thread-cutting shaft, a gear assembly, and a rack assembly. The gear assembly is connected to the thread-cutting shaft, and the rack assembly meshes with the gear assembly to drive the gear assembly to rotate, thereby driving the thread-cutting shaft to rotate and realizing demolding.

[0054] However, when producing the special-shaped nut 2, the inside of the nut is not fully threaded, and the nut has some special structures. Refer to Figure 1 and Figure 2 , the special-shaped nut 2 includes an outer shell 21, a plurality of card blocks 24, and a plurality of threaded parts 25. The outer shell 21 is in the shape of a top hat and has a regular hexagonal cross-section. The outer shell 21 is provided with a connecting groove 22, and a plurality of card slots 23 are provided around the connecting groove 22. The card blocks 24 and the threaded parts 25 are both arranged in a circumferential array inside the connecting groove 22, and the card blocks 24 are arranged between adjacent threaded parts 25.

[0055] Due to the existence of the clamping block 24, the traditional rear mold thread core-pulling injection mold cannot achieve the demolding of the special-shaped nut 2 by the relative rotation of the two mold cores.

[0056] The following will further elaborate on this application with reference to the attached Figures 3 - 9 drawings.

[0057] A rotary demolding mold disclosed in an embodiment of this application, referring to Figure 3 and Figure 4 , the rotary demolding mold includes a housing 3, a driving assembly 6, a plurality of outer mold cores 4 and a plurality of inner mold cores 5. For the convenience of the examiner's understanding, only a part of the housing 3 is shown in the attached Figures 3 - 9 drawings. The housing 3 is provided with an outer mold core mounting plate 8 and an inner mold core mounting plate 9. The outer mold core mounting plate 8 is slidably connected to the housing 3 in the vertical direction, and the inner mold core mounting plate 9 is slidably connected to the housing 3 in the vertical direction.

[0058] Referring to Figure 4 and Figure 5 , a plurality of outer mold cores 4 are arranged in a two-row and multi-column rectangular array on the outer mold core mounting plate 8 (combining Figure 6 and Figure 7 ), and the outer mold core 4 is rotatably connected to the outer mold core mounting plate 8. A plurality of inner mold cores 5 are arranged in a two-row and multi-column rectangular array in the horizontal direction on the inner mold core mounting plate 9. The inner mold cores 5 are arranged in one-to-one correspondence with the outer mold cores 4. When the outer mold core 4 is buckled with the inner mold core 5, a cavity for forming the special-shaped nut 2 is formed between the outer mold core 4 and the inner mold core 5. The outer mold core 4 is used to form the outer wall surface of the outer shell 21 of the special-shaped nut 2, and the inner mold core 5 is used to form the connecting groove 22, the clamping groove 23, the clamping block 24 and the threaded portion 25 of the special-shaped nut 2.

[0059] Referring to Figure 5 and Figure 7 , the inner mold core 5 includes a threaded inner mold core 51 and a clamping block inner mold core 52. The clamping block inner mold core 52 is slidably connected to the inner mold core mounting plate 9, the threaded inner mold core 51 is slidably connected to the inner mold core mounting plate 9, the threaded inner mold core 51 passes through the clamping block inner mold core 52, and the partial structure of the threaded inner mold core 51 for forming the threaded portion 25 is spaced from the partial structure of the clamping block inner mold core 52 for forming the clamping block 24.

[0060] Referring to Figure 8 and Figure 9 , a plurality of ejector rods 7 are slidably connected to the housing 3 in the vertical direction. The plurality of ejector rods 7 are divided into multiple groups. The multiple ejector rods 7 in the same group are arranged around the inner mold core 5, and the ejector rods 7 penetrate through the threaded inner mold core 51 or the clamping block inner mold core 52.

[0061] The driving methods of the outer die core mounting plate 8, the inner die core mounting plate 9, the outer die core 4, and the threaded inner die core 51 are conventional technical means in the art. For example, a plurality of cylinders can be installed on the housing 3, and the cylinders are used to drive the outer die core mounting plate 8, the inner die core mounting plate 9, and the threaded inner die core 51 to move in the vertical direction, so details are not described herein.

[0062] After the special-shaped nut 2 is formed, the outer die core mounting plate 8 drives the outer die core 4 to move upward in the vertical direction, the inner die core mounting plate 9 and the threaded inner die core 51 move upward together in the vertical direction, and the block inner die core 52 remains stationary until the special-shaped nut 2 completely disengages from the block inner die core 52. Then, the outer die core mounting plate 8 drives the outer die core 4 to move upward a small distance, so that the outer wall surface of the special-shaped nut 2 with a hexagonal cross-section is in partial contact with the outer die core 4. After that, the outer die core 4 drives the special-shaped nut 2 to rotate, so that the threaded portion 25 of the special-shaped nut 2 disengages from the threaded inner die core 51. Finally, the ejector rod 7 moves in the vertical direction and ejects the special-shaped nut 2 from the inner die core 5, so that the special-shaped nut 2 is disengaged from the inner die core 5.

[0063] The design of the outer die core 4 and the inner die core 5 is adopted, wherein the outer die core 4 is rotatably connected to the housing 3, and the inner die core 5 is slidably arranged in the housing 3. This design allows the mold to achieve more flexible movements during the demolding process, especially for special-shaped nuts 2 with complex internal structures such as the block 24; through the combined actions of rotation and sliding, the mold can achieve a more stable and precise demolding process, reducing the possibility of product adhesion and damage, thereby improving production efficiency and the qualified rate of products.

[0064] By providing a plurality of outer die cores 4 and a plurality of inner die cores 5, a plurality of special-shaped nuts 2 can be produced simultaneously, significantly improving production efficiency.

[0065] By arranging a plurality of ejector rods 7 around the inner die core 5, the ejection force can be more evenly distributed, avoiding excessive local stress leading to product deformation or damage, and ensuring the smoothness during demolding.

[0066] Refer to Figure 3, the driving assembly 6 includes a driving member 61, a driving rack 62 and a plurality of driven gears 63. There are two driving assemblies 6, and the driving assemblies 6 correspond to a row of outer die cores 4 one by one. The plurality of driven gears 63 of one driving assembly 6 are arranged corresponding to a row of outer die cores 4 one by one, and the driven gears 63 are fixedly connected to the outer die cores 4 coaxially. The driving rack 62 is slidably connected to the outer die core mounting plate 8 along the connection direction of a row of driven gears 63. The driving rack 62 meshes with a row of driven gears 63 simultaneously. A plurality of rollers 64 are rotatably connected to the driving rack 62. The plurality of rollers 64 are arranged along the length direction of the driving rack 62. The rotation axis of the roller 64 is arranged horizontally and perpendicular to the moving direction of the driving rack 62, so that the driving rack 62 is slidably matched with the outer die core mounting plate 8 through the rollers 64. The driving member 61 is a cylinder, and the output end of the driving member 61 is fixedly connected to the driving rack 62. The output end of the driving member 61 is used to drive the driving rack 62 to move.

[0067] When the driving member 61 drives the driving rack 62 to move, it can drive a row of a plurality of outer die cores 4 to rotate through the driven gears 63. The driving rack 62 of one driving assembly 6 meshes with a row of a plurality of driven gears 63, so as to realize precise control of the synchronous movement of each row of die cores. This design not only improves the automation degree of the mold, but also ensures the coordination and stability of the mold operation.

[0068] The rollers 64 can reduce the wear and smoothness when the driving rack 62 moves.

[0069] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A rotary demoulding die, characterized in that, Including: A housing (3), an outer mold core (4), and an inner mold core (5); The outer mold core (4) is rotatably connected to the housing (3), and a cavity for molding the special-shaped nut (2) is formed between the outer mold core (4) and the inner mold core (5); The inner mold core (5) is slidably arranged in the housing (3) and includes a threaded inner mold core (51) and a block inner mold core (52). The threaded inner mold core (51) is used for molding the threaded portion (25) of the special-shaped nut (2), and the block inner mold core (52) is used for molding the block (24) of the special-shaped nut (2); A driving assembly (6), and the driving assembly (6) is used for driving the outer mold core (4) and the inner mold core (5) to act.

2. The rotary demoulding die according to claim 1, characterized in that: The driving assembly (6) includes a driving member (61), a driving rack (62), and a driven gear (63). The driven gear (63) is coaxially and fixedly connected to the outer mold core (4). The driving rack (62) is slidably arranged in the housing (3) and meshes with the driven gear (63). The output end of the driving member (61) is fixedly connected to the driving rack (62).

3. The rotary demoulding die according to claim 2, wherein: A roller (64) is rotatably connected to the driving rack (62).

4. A rotary demolding mold according to claim 2, characterized in that: A plurality of the outer mold cores (4) and the inner mold cores (5) are provided, and the outer mold cores (4) and the inner mold cores (5) are arranged in one-to-one correspondence.

5. The rotary demoulding die according to claim 4, characterized in that: The outer mold cores (4) and the inner mold cores (5) are both arranged in two rows. Two driving assemblies (6) are provided. A plurality of the driven gears (63) of the driving assembly (6) are arranged corresponding to one row of the outer mold cores (4). The driving rack (62) of one driving assembly (6) meshes with a plurality of the driven gears (63) in one row.

6. The rotary demolding die according to claim 1, characterized in that: A ejector rod (7) is slidably arranged in the housing (3), and the ejector rod (7) is used for ejecting the special-shaped nut (2) from the inner mold core (5).

7. A rotary demolding die according to claim 6, characterized in that: A plurality of the ejector rods (7) are provided. The plurality of ejector rods (7) are slidably connected to the inner mold core (5), and the ejector rods (7) penetrate through the inner mold core (5).

8. A rotary demolding mold according to claim 7, characterized in that: The plurality of ejector rods (7) are arranged around the inner mold core (5).

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