A clamp forming die

Abstract

This utility model relates to the field of mold technology, specifically disclosing a clamp forming mold. It includes an upper mold plate, an upper mold core, a lower mold core, a lower mold plate, and a lower mold assembly; a horn-shaped core-pulling structure, comprising a first upper core-pulling block and a first lower core-pulling block for jointly forming the inner portion of the horn-shaped structure, a second upper core-pulling block and a second lower core-pulling block for jointly forming the outer portion of the horn-shaped structure, and an ejection structure disposed on the lower mold assembly; the first upper core-pulling block and the first lower core-pulling block are disposed on the upper mold core, and the second upper core-pulling block and the second lower core-pulling block are disposed on the lower mold core, the ejection structure being used to drive the second lower core-pulling block upward; a side groove core-pulling structure, comprising a first forming block, a second forming block, a first driving structure, and a second driving structure; this utility model simplifies the mold structure and significantly reduces the mold volume and manufacturing cost by using a staged extraction method for the horn-shaped structure.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a clamp forming mold. Background Technology

[0002] The mold industry is a key foundation of manufacturing, involving the design and manufacture of tools for molding materials. Widely used in the automotive, electronics, and plastics industries, it plays a decisive role in product precision, efficiency, and quality, and is an indispensable supporting industry for modern industry. In the field of injection molds, producing plastic products with special geometries often presents demolding challenges. For example... Figure 1-2 The clamp product shown has an outwardly flared, trumpet-shaped structure 44 on one side wall, while the other side wall has a first side groove 42 opening in a first direction and a second side groove 43 opening in a second direction. The trumpet-shaped structure 44 exhibits a significant slope, forming an undercut in the mold opening direction. When the mold opens directly, this undercut area will severely interfere with the mold cavity or core, causing the product to fail to eject smoothly, and may even damage the mold or the product itself. The traditional and direct solution in the industry is to use a transverse core-pulling mechanism on the outer part of the trumpet-shaped structure 44. However, introducing a transverse core-pulling mechanism inevitably occupies space within the mold and is prone to interference with other structures, greatly increasing the mold manufacturing cost. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a clamp forming mold that simplifies the mold structure and significantly reduces the mold volume and manufacturing cost by using a staged extraction method to extract the trumpet-shaped structure.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A clamp forming mold, comprising:

[0006] Upper mold plate, upper mold core, lower mold core, lower mold plate, and lower mold assembly;

[0007] The horn-shaped core-pulling structure includes a first upper core-pulling block and a first lower core-pulling block for co-molding the inner portion of the horn-shaped structure, a second upper core-pulling block and a second lower core-pulling block for co-molding the outer portion of the horn-shaped structure, and an ejection structure disposed on the lower mold assembly; the first upper core-pulling block and the first lower core-pulling block are disposed on the upper mold core, the second upper core-pulling block and the second lower core-pulling block are disposed on the lower mold core, and the ejection structure is used to drive the second lower core-pulling block to move upward.

[0008] The side groove core-pulling structure includes a first molding block for forming a first side groove, a second molding block for forming a second side groove, a first driving structure for driving the first molding block to pull the core along a first direction, and a second driving structure for driving the second molding block to pull the core along a second direction.

[0009] During mold opening, the first upper core-pulling block moves upward with the upper mold core for core pulling, and then the second upper core-pulling block moves upward with the upper mold core for core pulling; the second lower core-pulling block and the molded part can be lifted by the ejector structure so that the first lower core-pulling block and the molded part are opposite each other for core pulling, and then the ejector structure can lift the molded part so that the molded part and the second lower core-pulling block are opposite each other for core pulling.

[0010] According to some embodiments of the present invention, the first upper core-pulling block is provided with first limiting protrusions on both sides, the second upper core-pulling block is provided with second limiting protrusions on both sides, the top of the upper mold core is provided with a first ejection groove matching the shape of the first limiting protrusion and a second ejection groove matching the shape of the second limiting protrusion, the bottom of the first limiting protrusion abuts against the top of the first ejection groove, and the top of the second ejection groove is spaced apart from the bottom of the second limiting protrusion by a predetermined distance.

[0011] According to some embodiments of the present invention, the second upper core-pulling block is provided with an elastic structure, one end of which abuts against the bottom of the upper template and the other end of which abuts against the top of the second upper core-pulling block.

[0012] According to some embodiments of the present invention, the first lower core-pulling block is provided with third limiting protrusions on both sides, the second lower core-pulling block is provided with fourth limiting protrusions on both sides, the bottom of the lower mold core is provided with a third ejection groove matching the shape of the third limiting protrusion and a fourth ejection groove matching the shape of the fourth limiting protrusion, the top of the third limiting protrusion abuts against the bottom of the third ejection groove, and the bottom of the fourth ejection groove is at a predetermined distance from the top of the fourth limiting protrusion.

[0013] According to some embodiments of the present invention, the ejector structure comprises multiple ejector pins, and the second lower core-pulling block has through holes through which the ejector pins pass.

[0014] According to some embodiments of the present invention, both the first driving structure and the second driving structure include a slide block and an inclined guide post connected to the upper mold core. The slide block has an inclined through groove that matches the inclined guide post. The slide block is used to fix the first molding block or the second molding block.

[0015] According to some embodiments of this utility model, the upper mold core and the lower mold core together enclose a molding cavity, the molding cavity including a first molding cavity, a second molding cavity, a third molding cavity and a fourth molding cavity, the first molding blocks on the first molding cavity and the second molding cavity are jointly fixed on the same slide, the first molding blocks on the third molding cavity and the fourth molding cavity are jointly fixed on the same slide, the second molding blocks on the first molding cavity and the third molding cavity are jointly fixed on the same slide, and the second molding blocks on the second molding cavity and the fourth molding cavity are jointly fixed on the same slide.

[0016] According to some embodiments of the present invention, the second molding block abuts against the first molding block.

[0017] This utility model has at least the following beneficial effects:

[0018] The trumpet-shaped structure is formed on both inner and outer sides, avoiding the interference problems caused by the tapered surface slope of traditional one-piece molding. During mold opening, the first upper core-pulling block pulls the core first, making room for the deformation of the molded part. Then, the second upper core-pulling block smoothly demolds using the elastic deformation of the molded part. The lower core-pulling block achieves step-by-step core pulling through the ejection structure, ensuring a smooth transition and reducing the complex components required for traditional horizontal core pulling. This simplifies the mold structure and reduces manufacturing costs and mold volume. At the same time, the side groove core-pulling structure allows for independent core pulling without interference. Overall, this simplifies the mold structure and significantly reduces mold volume and manufacturing costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the product structure of this utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the product structure of this utility model. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0022] Figure 4 This is an enlarged view of the marked area in Figure A of this utility model;

[0023] Figure 5 This is a schematic diagram of the upper mold core according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the molding cavity structure according to an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the side groove core-pulling structure according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the core-pulling process of a speaker core-pulling structure according to an embodiment of the present invention. Figure 1 ;

[0027] Figure 9 This is a schematic diagram of the core-pulling process of a speaker core-pulling structure according to an embodiment of the present invention. Figure 2 ;

[0028] Figure 10 This is a schematic diagram of the core-pulling process of a speaker core-pulling structure according to an embodiment of the present invention. Figure 3 ;

[0029] Figure 11 This is a schematic diagram of the core-pulling process of a speaker core-pulling structure according to an embodiment of the present invention. Figure 4 . Detailed Implementation

[0030] This invention provides the following description with reference to the accompanying drawings to aid in a comprehensive understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0031] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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 utility model.

[0032] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intermediary element (e.g., the third element) between the element and the other element.

[0033] An embodiment of this utility model provides a clamp forming mold, such as Figure 1-11 As shown, it includes:

[0034] Upper template 11, upper mold core 12, lower mold core 13, lower template 14, and lower mold assembly 15;

[0035] The horn-shaped core-pulling structure includes a first upper core-pulling block 201 and a first lower core-pulling block 203 for co-molding the inner portion of the horn-shaped structure 44, a second upper core-pulling block 202 and a second lower core-pulling block 204 for co-molding the outer portion of the horn-shaped structure 44, and an ejection structure 16 disposed on the lower mold assembly 15; the first upper core-pulling block 201 and the first lower core-pulling block 203 are disposed on the upper mold core 12, the second upper core-pulling block 202 and the second lower core-pulling block 204 are disposed on the lower mold core 13, and the ejection structure 16 is used to drive the second lower core-pulling block 204 to move upward;

[0036] The side groove core-pulling structure includes a first molding block 301 for forming a first side groove 42, a second molding block 302 for forming a second side groove 43, a first driving structure 303 for driving the first molding block 301 to pull the core along a first direction, and a second driving structure 304 for driving the second molding block 302 to pull the core along a second direction.

[0037] When the mold is opened, the first upper core-pulling block 201 moves up with the upper mold core 12 to pull the core, and then the second upper core-pulling block 202 moves up with the upper mold core 12 to pull the core. The second lower core-pulling block 204 and the molded part 41 can be lifted by the ejector structure 16 so that the first lower core-pulling block 203 and the molded part 41 are opposite each other for core pulling. Then the ejector structure 16 can lift the molded part 41 so that the molded part 41 and the second lower core-pulling block 204 are opposite each other for core pulling.

[0038] The horn-shaped core-pulling structure achieves the forming and core-pulling of the horn-shaped structure 44 through a split molding and segmented core-pulling process. The forming of the horn-shaped structure 44 is divided into inner and outer sides: the inner part is formed by the first upper core-pulling block 201 and the first lower core-pulling block 203, and the outer part is formed by the second upper core-pulling block 202 and the second lower core-pulling block 204. Because the horn-shaped structure 44 has a conical surface, interference problems arise due to the slope of the horn-shaped structure 44, preventing direct core-pulling after integral molding due to the conical surface interference. When the mold is opened, the first upper core-pulling block 201 moves up with the upper mold core 12 to pull the core. The inner part does not cause interference with the mold opening and core pulling. The first upper core-pulling block 201 pulls the core first, so that the product is partially demolded, making room for the deformation of the molded part 41. Then the second upper core-pulling block 202 pulls the core. Since the molded part 41 has a certain elastic deformation, when the second upper core-pulling block 202 pulls the core, the molded part 41 deforms inward, so that the second upper core-pulling block 202 can pull the core smoothly and demold. Similarly, the first lower core-pulling block 203 and the second lower core-pulling block 204 are ejected. The ejection structure 16 can be a spring structure, a push block, an ejector rod, or other structures. The ejection structure 16 can directly drive the second lower core-pulling block 204 to move upward, or it can drive the molding block upward while simultaneously driving the second lower core-pulling block 204 upward. The molding part 41 and the second lower core-pulling block 204 are simultaneously ejected, causing the first lower core-pulling block 203 to move downward relative to the second lower core-pulling block 204 for core pulling and demolding, freeing up deformation space. The molding part 41 is then ejected and separated from the second core-pulling block, achieving core pulling and demolding of the second core-pulling block and the molding part 41. The entire process achieves a smooth demolding transition, reducing and avoiding the lateral sliders, cylinders, and guide components required by traditional transverse core-pulling mechanisms, significantly simplifying the mold structure and greatly reducing the mold volume and manufacturing cost. At the same time, in conjunction with the first drive structure 303 and the second drive structure 304, the first molding block 301 and the second molding block 302 can be independently pulled in different directions, with no interference in the overall structure and high concentration.

[0039] In some embodiments, such as Figure 4 , 5 As shown in Figures 8 and 11, the first upper core-pulling block 201 is provided with first limiting protrusions 205 on both sides, the second upper core-pulling block 202 is provided with second limiting protrusions 206 on both sides, the upper mold core 12 is provided with a first ejection groove 207 that matches the shape of the first limiting protrusion 205 and a second ejection groove 208 that matches the shape of the second limiting protrusion 206 at the top, the bottom of the first limiting protrusion 205 abuts against the top of the first ejection groove 207, and the top of the second ejection groove 208 is spaced apart from the bottom of the second limiting protrusion 206 by a preset distance.

[0040] The contact between the first limiting protrusion 205 and the first ejector groove 207 ensures that the first upper core-pulling block 201 moves stably upward with the upper mold core 12 during core pulling. Simultaneously, the preset interval between the second limiting protrusion 206 and the second ejector groove 208 provides reasonable movement space for the second upper core-pulling block 202, allowing it to move in a predetermined sequence during core pulling, preventing it from being driven by the upper mold core 12. This interval is determined by those skilled in the art based on the core pulling situation of the first upper core-pulling block 201, effectively ensuring the quality of the molded part 41 and the service life of the mold.

[0041] Furthermore, such as Figure 4 As shown, the second upper core-pulling block 202 is provided with an elastic structure 209. One end of the elastic structure 209 abuts against the bottom of the upper template 11, and the other end abuts against the top of the second upper core-pulling block 202.

[0042] The elastic structure 209 provides a downward thrust for the second upper core-pulling block 202 during mold opening, ensuring that the first upper core-pulling block 201 and the second upper core-pulling block 202 are relatively separated, and that the second upper core-pulling block 202 is not moved upward due to friction between them before the first upper core-pulling block 201 is completely pulled out, thus ensuring the molding quality.

[0043] In some embodiments, such as Figure 4 , 11 As shown, the first lower core-pulling block 203 is provided with third limiting protrusions 210 on both sides, the second lower core-pulling block 204 is provided with fourth limiting protrusions 211 on both sides, the bottom of the lower mold core 13 is provided with a third ejection groove matching the shape of the third limiting protrusion 210 and a fourth ejection groove 213 matching the shape of the fourth limiting protrusion 211, the top of the third limiting protrusion 210 abuts against the bottom of the third ejection groove, and the bottom of the fourth ejection groove 213 is spaced apart from the top of the fourth limiting protrusion 211 by a preset distance.

[0044] By abutting against the third limiting protrusion 210 and the third ejection groove, the first lower core-pulling block 203 is ensured to be restricted from upward displacement by the lower mold core 13 during the ejection of the second lower core-pulling block 204 and the molding block, thus ensuring core pulling of the molding part 41. The preset interval between the fourth limiting protrusion 211 and the fourth ejection groove 213 provides reasonable movement space for the second lower core-pulling block 204, allowing it to move smoothly in a predetermined sequence during demolding, ensuring that the molding part 41 does not have relative displacement with the first lower core-pulling block 203 before core pulling, thereby improving the core pulling quality.

[0045] In some embodiments, such as Figure 4 , 11 As shown, the ejector structure 16 consists of multiple ejector pins 161, and the second lower core-pulling block 204 has through holes 162 through which the ejector pins 161 pass.

[0046] The ejector pin 161 can be pushed upward by the lower mold assembly 15 to directly eject the molded part 41. Compared with ejecting the molded part 41 by setting up a structure to eject the second lower core-pulling block 204, the structure is reduced. The friction between the trumpet-shaped structure 44 and the second lower core-pulling block 204 can drive the second lower core-pulling block 204 while pushing the molded part 41, so as to achieve the ejection effect and reduce the structural cost.

[0047] In some embodiments, such as Figure 7 As shown, both the first drive structure 303 and the second drive structure 304 include a slide 305 and an inclined guide post 306 connected to the upper mold core 12. The slide 305 has an inclined through groove 307 that matches the inclined guide post 306. The slide 305 is used to fix the first molding block 301 or the second molding block 302.

[0048] By cooperating with the inclined guide post 306 and the inclined through groove 307 on the slide block 305, precise motion control of the slide block 305 can be achieved through the inclined guide post 306, ensuring that the first molding block 301 and the second molding block 302 can smoothly and accurately perform core-pulling action in a predetermined direction when the mold is opened. The design of the slide block 305 not only provides stable fixed support for the molding blocks, but also achieves precise motion transmission through the guidance of the inclined guide post 306. The inclined guide post 306 can move upward as the upper mold core 12 opens, reducing the need for additional drive structures and lowering production costs.

[0049] Furthermore, such as Figure 6 As shown, the upper mold core 12 and the lower mold core 13 together form a molding cavity, which includes a first molding cavity 171, a second molding cavity 172, a third molding cavity 173 and a fourth molding cavity 174. The first molding blocks 301 on the first molding cavity 171 and the second molding cavity 172 are fixed together on the same slide 305. The first molding blocks 301 on the third molding cavity 173 and the fourth molding cavity 174 are fixed together on the same slide 305. The second molding blocks 302 on the first molding cavity 171 and the third molding cavity 173 are fixed together on the same slide 305. The second molding blocks 302 on the second molding cavity 172 and the fourth molding cavity 174 are fixed together on the same slide 305.

[0050] The four molding cavities allow two adjacent first molding blocks 301 and two adjacent second molding blocks 302 to share the same slide block 305, enabling combined core pulling. The reasonable arrangement makes full use of the space on all four sides of the mold, improving production efficiency while reducing production costs.

[0051] In some embodiments, such as Figure 7 As shown, the second molding block 302 is directly abutted against the first molding block 301.

[0052] The first molding block 301 and the second molding block 302 are combined to form the side structure of the product, reducing the need for additional structures and lowering costs.

[0053] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, those skilled in the art should understand that the foregoing description of various embodiments of the present invention is for illustrative purposes only, and not intended to limit the present invention as defined by the appended claims and their equivalents.

Claims

1. A clamp forming mold, characterized in that, include: Upper template (11), upper mold core (12), lower mold core (13), lower template (14), and lower mold assembly (15); The horn-shaped core-pulling structure includes a first upper core-pulling block (201) and a first lower core-pulling block (203) for co-molding the inner portion of the horn-shaped structure (44), a second upper core-pulling block (202) and a second lower core-pulling block (204) for co-molding the outer portion of the horn-shaped structure (44), and an ejection structure (16) disposed on the lower mold assembly (15); the first upper core-pulling block (201) and the first lower core-pulling block (203) are disposed on the upper mold core (12), the second upper core-pulling block (202) and the second lower core-pulling block (204) are disposed on the lower mold core (13), and the ejection structure (16) is used to drive the second lower core-pulling block (204) to move upward; The side groove core-pulling structure includes a first molding block (301) for molding a first side groove (42), a second molding block (302) for molding a second side groove (43), a first driving structure (303) for driving the first molding block (301) to pull the core along a first direction, and a second driving structure (304) for driving the second molding block (302) to pull the core along a second direction. When the mold is opened, the first upper core-pulling block (201) moves up with the upper mold core (12) to pull the core, and then the second upper core-pulling block (202) moves up with the upper mold core (12) to pull the core; the second lower core-pulling block (204) and the molded part (41) can be lifted by the ejector structure (16) so that the first lower core-pulling block (203) and the molded part (41) are pulled relative to each other. Then the ejector structure (16) can lift the molded part (41) so that the molded part (41) and the second lower core-pulling block (204) are pulled relative to each other.

2. The clamp forming mold according to claim 1, characterized in that: The first upper core-pulling block (201) is provided with first limiting protrusions (205) on both sides, and the second upper core-pulling block (202) is provided with second limiting protrusions (206) on both sides. The top of the upper mold core (12) is provided with a first ejection groove (207) that matches the shape of the first limiting protrusion (205) and a second ejection groove (208) that matches the shape of the second limiting protrusion (206). The bottom of the first limiting protrusion (205) abuts against the top of the first ejection groove (207), and the top of the second ejection groove (208) is at a preset distance from the bottom of the second limiting protrusion (206).

3. The clamp forming mold according to claim 2, characterized in that: The second upper core-pulling block (202) is provided with an elastic structure (209), one end of which abuts against the bottom of the upper template (11), and the other end abuts against the top of the second upper core-pulling block (202).

4. The clamp forming mold according to claim 1, characterized in that: The first lower core-pulling block (203) is provided with third limiting protrusions (210) on both sides, and the second lower core-pulling block (204) is provided with fourth limiting protrusions (211) on both sides. The bottom of the lower mold core (13) is provided with a third ejection groove that matches the shape of the third limiting protrusion (210) and a fourth ejection groove (213) that matches the shape of the fourth limiting protrusion (211). The top of the third limiting protrusion (210) abuts against the bottom of the third ejection groove, and the bottom of the fourth ejection groove (213) is at a preset distance from the top of the fourth limiting protrusion (211).

5. The clamp forming mold according to claim 1, characterized in that: The ejector structure (16) consists of multiple ejector pins (161), and the second lower core-pulling block (204) has through holes (162) through which the ejector pins (161) pass.

6. The clamp forming mold according to claim 1, characterized in that: Both the first driving structure (303) and the second driving structure (304) include a slide (305) and an inclined guide post (306) connected to the upper mold core (12). The slide (305) has an inclined through groove (307) that matches the inclined guide post (306). The slide (305) is used to fix the first molding block (301) or the second molding block (302).

7. A clamp forming mold according to claim 6, characterized in that: The upper mold core (12) and the lower mold core (13) together enclose to form a molding cavity. The molding cavity includes a first molding cavity (171), a second molding cavity (172), a third molding cavity (173), and a fourth molding cavity (174). The first molding blocks (301) on the first molding cavity (171) and the second molding cavity (172) are fixed together on the same slide (305). The first molding blocks (301) on the third molding cavity (173) and the fourth molding cavity (174) are fixed together on the same slide (305). The second molding blocks (302) on the first molding cavity (171) and the third molding cavity (173) are fixed together on the same slide (305). The second molding blocks (302) on the second molding cavity (172) and the fourth molding cavity (174) are fixed together on the same slide (305).

8. The clamp forming mold according to claim 1, characterized in that: The second molding block (302) is in contact with the first molding block (301).

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