Improved mold for shoes

Abstract

The utility model relates to the technical field of molds, and particularly discloses an improved mold for shoes. The mold comprises an upper mold body and a lower mold body, a movable groove is formed in the upper mold body, a butterfly plate structure capable of sliding up and down is arranged in the movable groove, and a first guide structure is arranged in the center of the bottom of the movable groove. The butterfly plate structure comprises a butterfly plate body, a second guide structure which is arranged on the butterfly plate body and downwards penetrates out of the upper mold, and a mold core block which penetrates through the upper mold and is connected with the butterfly plate body; the first guide structure is used for guiding the central position of the butterfly plate body, and the second guide structure is used for guiding the peripheral position of the butterfly plate body; a first forming area and a second forming area are arranged at the bottom of the upper die, and during die assembly, the first forming area, the die core block and the second forming area are combined together to form a forming cavity. The improved mold disclosed by the utility model is high in stability and high in forming precision.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to an improved mold for footwear. Background Technology

[0002] like Figure 1-2 The existing IP injection mold shown is characterized by high precision requirements, long production cycles, numerous mold components and accessories, and high costs. For example, the upper mold contains a double-layer butterfly plate 301 for fixing the guide rod 303. The two butterfly plates 301 are fixed with screws, which takes a long time to process and is cumbersome to assemble. Moreover, they may loosen or wobble after prolonged use during production. The butterfly plates also contain a ball bearing sleeve structure 302 for guidance, but its guiding effect deteriorates after prolonged use, requiring replacement and incurring high costs. These issues can affect the wobbling of the connected guide rod 303, and in more serious cases, can cause mold damage or even mold scrap. Furthermore, due to the high precision requirements of footwear, this can further affect the molding accuracy of the footwear. Therefore, improvements to this mold are necessary. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an improved mold for footwear, which has high stability and high molding precision.

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

[0005] An improved mold for footwear includes an upper mold and a lower mold. The upper mold has a movable groove, within which a butterfly board structure that can slide up and down is provided. A first guide structure is provided at the bottom center of the movable groove. The butterfly board structure includes a butterfly board body, a second guide structure disposed on the butterfly board body and extending downward through the upper mold, and a mold core block that passes through the upper mold and connects to the butterfly board body. The first guide structure guides the center position of the butterfly board body, and the second guide structure guides the peripheral position of the butterfly board body.

[0006] The bottom of the upper mold is provided with a first forming area that cooperates with the mold core block, and the top surface of the lower mold is provided with a second forming area that cooperates with the mold core block. When the mold is closed, the second guide structure abuts against the lower mold, and the mold core block abuts against the first forming area. The first forming area, the mold core block and the second forming area are combined to form a forming cavity.

[0007] According to some embodiments of the present invention, the first guide structure includes a guide post disposed at the bottom of the movable groove for guiding the butterfly board structure, and the butterfly board body is provided with a first guide groove that matches the guide post.

[0008] According to some embodiments of this utility model, the diameter of the guide post is 60mm.

[0009] According to some embodiments of the present invention, the second guide structure includes a guide rod slidably connected to the upper mold, the guide rod including a limiting part at its bottom and a fixing part at its top connected to the butterfly plate body; when the mold is closed, the bottom of the limiting part abuts against the lower mold.

[0010] According to some embodiments of the present invention, the second guide structure further includes a spring structure sleeved on the outer side of the bottom of the guide rod, the bottom of the spring structure abutting against the limiting part, and the top of the spring structure abutting against the upper mold when the mold is closed.

[0011] According to some embodiments of the present invention, the bottom of the upper mold is provided with a first spring groove that matches the spring structure, and the lower mold is provided with a second spring groove that matches the spring structure.

[0012] According to some embodiments of the present invention, pads are placed in both the first spring groove and the second spring groove.

[0013] According to some embodiments of the present invention, the fixing part includes a limiting protrusion ring abutting against the bottom surface of the butterfly plate body, a threaded rod disposed on the limiting protrusion ring, and a fastener screwed to the threaded rod, wherein the bottom surface of the fastener abuts against the top surface of the butterfly plate body.

[0014] According to some embodiments of the present invention, the butterfly plate body is provided with a first limiting groove that matches the limiting protrusion ring and a second limiting groove that matches the fastener.

[0015] According to some embodiments of the present invention, there are two second molding areas. The lower mold has a Y-shaped main channel on its upper surface between the two second molding areas, which connects to the outside of the lower mold. The two ends of the main channel are respectively connected to V-shaped injection channels. One end of the injection channel is connected to the main channel, and then extends downward to the lower mold and bends upward. The other end of the injection channel is connected to the second molding area.

[0016] This utility model has at least the following beneficial effects:

[0017] In this improved mold, the butterfly board body is changed from two butterfly boards to one butterfly board body, which reduces raw material costs but increases strength and shortens processing time. The first guide structure guides the middle part of the butterfly board body, and the second guide structure guides the periphery of the butterfly board body, improving the stability and forming accuracy of the butterfly board structure. This improved mold has high stability and high forming accuracy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the original mold ball bearing sleeve structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the original mold butterfly plate of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure before mold closing in one embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the mold-closed structure according to one embodiment of the present invention. Figure 1 ;

[0022] Figure 5 This is a schematic diagram of the mold-closed structure according to one embodiment of the present invention. Figure 2 ;

[0023] Figure 6 This is a schematic diagram of the lower mold structure according to an embodiment of the present invention. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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 intervening element (e.g., the third element) between the element and the other element.

[0027] An embodiment of this utility model provides an improved mold for footwear, such as... Figure 1-6As shown, the device includes an upper mold 101 and a lower mold 102. The upper mold 101 is provided with a movable groove 103, and a butterfly board structure 201 that can slide up and down is provided in the movable groove 103. A first guide structure 104 is provided at the bottom center of the movable groove 103. The butterfly board structure 201 includes a butterfly board body 202, a second guide structure 203 provided on the butterfly board body 202 that extends downward through the upper mold 101, and a mold core block 204 that passes through the upper mold 101 and connects to the butterfly board body 202. The first guide structure 104 is used to guide the center position of the butterfly board body 202, and the second guide structure 203 is used to guide the peripheral position of the butterfly board body 202.

[0028] The bottom of the upper mold 101 is provided with a first forming area 105 that cooperates with the mold core block 204, and the top surface of the lower mold 102 is provided with a second forming area 106 that cooperates with the mold core block 204. When the mold is closed, the second guide structure 203 abuts against the lower mold 102, and the mold core block 204 abuts against the first forming area 105. The first forming area 105, the mold core block 204, and the second forming area 106 are combined to form a forming cavity.

[0029] The original mold had two butterfly plates 301, made of aluminum, which were used to fix the original guide rod 303 with hexagonal nuts. However, they would loosen after prolonged use. In this improved mold, the butterfly plate body 202 has a different fixing method for the second guide structure 203. The second guide structure 203 is now directly fixed to the four corners and other peripheral positions of the butterfly plate body 202. The butterfly plate has been changed from two aluminum plates to one aluminum plate, reducing raw material costs, increasing strength, shortening processing time, and simplifying disassembly and repair, resulting in a significant overall optimization. The first guide structure 104 guides the center of the butterfly plate body 202, improving the stability and forming accuracy of the center movement within the movable groove 103. The second guide structure 203 guides the peripheral positions of the butterfly plate body 202, improving the stability and forming accuracy of the outer structure. The specific number of second guide structures 203 can be increased or decreased according to the actual structure of the butterfly plate.

[0030] Specifically, such as Figure 3 As shown, before mold closing, the butterfly plate body 202 is abutting against the bottom of the movable groove 103. At this time, the second guide structure 203 extends out from the bottom of the upper mold 101. When the mold closes, the lower mold 102 drives the butterfly plate structure 201 to move towards the lower mold 102. The second guide structure 203 first abuts against the lower mold 102, and then the upper mold 101 continues to move downward. At this time, the butterfly plate body 202 moves upward relative to the movable groove 103 under the guidance of the first guide structure 104 and the second guide structure 203. Finally, the upper mold 101 and the lower mold 102 close, as shown. Figure 4As shown, at this time, the upper mold 101 abuts against the second guide structure 203, restricting the displacement of the butterfly plate structure 201 and ensuring the tight fit between the mold core block 204 and the first forming area 105. This improved mold has high stability and high forming accuracy.

[0031] In some embodiments, such as Figure 5 As shown, the first guide structure 104 includes a guide post 205 disposed at the bottom of the movable groove 103 for guiding the butterfly board structure 201, and the butterfly board body 202 is provided with a first guide groove that matches the guide post 205.

[0032] The original mold used a ball bearing sleeve structure 302 fitted on the outside of the guide post 205. However, in actual use, the guiding effect of the ball bearing sleeve structure 302 deteriorates after prolonged use, reducing molding accuracy and requiring replacement at high cost. The improved mold eliminates the ball bearing sleeve structure 302 and replaces it with the guide post 205, reducing costs while maintaining the guiding effect. The guide post 205 can be integrated or separate, and can be cylindrical or have guide protrusions.

[0033] Furthermore, the guide post 205 has a diameter of 60mm.

[0034] The inner diameter of the aluminum rod in the 302 ball bearing sleeve structure is only 30mm, resulting in a small contact area with the machine and insufficient pressure. Setting the cylinder diameter to 60mm increases the contact area with the machine, increases the mold strength, and extends the mold's service life.

[0035] In some embodiments, such as Figure 3-4 As shown, the second guide structure 203 includes a guide rod 207 that is slidably connected to the upper mold 101. The guide rod 207 includes a limiting part 208 located at its bottom and a fixing part 209 located at its top that is connected to the butterfly plate body 202. When the mold is closed, the bottom of the limiting part 208 abuts against the lower mold 102.

[0036] The fixing part 209 is used to fix the butterfly board body 202 directly, which is not easy to swing and reduces mold damage; the guide rod 207 extends out of the upper mold 101 and slides with the upper mold 101 during mold closing and mold opening; the limiting part 208 can limit the butterfly board body 202 by abutting against the upper mold 101 and the lower mold 102 during mold closing, or it can be a structure such as a spring to limit the butterfly board body 202 together. The limiting part 208 improves the stability of the butterfly board body 202 and ensures the molding accuracy.

[0037] Furthermore, such as Figure 3-4As shown, the second guide structure 203 also includes a spring structure 210 sleeved on the outside of the bottom of the guide rod 207. The bottom of the spring structure 210 abuts against the limiting part 208. When the mold is closed, the top of the spring structure 210 abuts against the upper mold 101.

[0038] A spring structure 210 is placed on the limiting part 208. When the mold is closed, the upper mold 101 presses the spring structure 210 toward the limiting part 208. Using the elastic force of the spring structure 210, the mold core block 204 on the butterfly board body 202 is further pressed toward the first forming area 105 to ensure forming accuracy and increase forming stability.

[0039] Furthermore, such as Figure 3-4 As shown, the bottom of the upper mold 101 is provided with a first spring groove 211 that matches the spring structure 210, and the lower mold 102 is provided with a second spring groove 212 that matches the spring structure 210.

[0040] During mold closing, such as Figure 4 As shown, the limiting part 208 is inserted into the second spring groove 212, and the top surface of the first spring groove 211 abuts against the top surface of the spring structure 210 and compresses the spring structure 210. The arrangement of the first spring groove 211 and the second spring groove 212 can further improve the stability of the second guide structure 203, compress the mold space, and reduce costs.

[0041] Furthermore, such as Figure 3-4 As shown, a pad 213 is placed in both the first spring groove 211 and the second spring groove 212.

[0042] The pad 213 can reduce the wear of the second guide structure 203 between the first spring groove 211 and the second spring groove 212, thereby improving the mold life.

[0043] Furthermore, such as Figure 4 As shown, the fixing part 209 includes a limiting protrusion ring 214 abutting against the bottom surface of the butterfly board body 202, a threaded rod 215 disposed on the limiting protrusion ring 214, and a fastener 216 screwed to the threaded rod 215. The bottom surface of the fastener 216 abuts against the top surface of the butterfly board body 202.

[0044] The limiting protrusion ring 214 can limit the distance between the butterfly plate body 202 and the guide rod 207, thereby improving the accuracy of the mold. The guide rod 207 is fixed by fasteners such as nuts 216 screwed onto the threaded rod 215.

[0045] Furthermore, such as Figure 1-2 As shown, the butterfly board body 202 is provided with a first limiting groove 217 that matches the limiting protrusion ring 214 and a second limiting groove 218 that matches the fastener 216.

[0046] The first limiting groove 217 and the second limiting groove 218 can limit the horizontal displacement of the limiting protrusion 214 and the fastener 216, and further fix them.

[0047] In some embodiments, such as Figure 6 As shown, there are two second forming areas 106. The lower mold 102 has a Y-shaped main channel 107 on its upper surface between the two second forming areas 106, which connects to the outside of the lower mold 102. The two ends of the main channel 107 are respectively connected to V-shaped injection channels 108. One end of the injection channel 108 is connected to the main channel 107, and then extends downward to the lower mold 102 and bends upward. The other end of the injection channel 108 is connected to the second forming area 106.

[0048] The two molding zones have two molding cavities, which can mold pairs of shoes at once. The V-shaped injection channel 108 can increase the injection pressure and improve molding.

[0049] 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. An improved mold for footwear, comprising an upper mold (101) and a lower mold (102), characterized in that: The upper mold (101) is provided with a movable groove (103), and a butterfly board structure (201) that can slide up and down is provided in the movable groove (103). A first guide structure (104) is provided at the bottom center of the movable groove (103). The butterfly board structure (201) includes a butterfly board body (202), a second guide structure (203) disposed on the butterfly board body (202) that extends downward through the upper mold (101), and a mold core block (204) that passes through the upper mold (101) and connects to the butterfly board body (202). The first guide structure (104) is used to guide the center position of the butterfly board body (202), and the second guide structure (203) is used to guide the peripheral position of the butterfly board body (202). The upper mold (101) has a first forming area (105) at its bottom that cooperates with the mold core block (204), and the lower mold (102) has a second forming area (106) on its top surface that cooperates with the mold core block (204). When the mold is closed, the second guide structure (203) abuts against the lower mold (102), and the mold core block (204) abuts against the first forming area (105). The first forming area (105), the mold core block (204), and the second forming area (106) together form a forming cavity.

2. The improved mold for footwear according to claim 1, characterized in that: The first guide structure (104) includes a guide post (205) disposed at the bottom of the movable groove (103) for guiding the butterfly board structure (201), and the butterfly board body (202) is provided with a first guide groove that matches the guide post (205).

3. The improved mold for footwear according to claim 2, characterized in that: The guide post (205) has a diameter of 60 mm.

4. The improved mold for footwear according to claim 1, characterized in that: The second guide structure (203) includes a guide rod (207) slidably connected to the upper mold (101). The guide rod (207) includes a limiting part (208) at its bottom and a fixing part (209) at its top connected to the butterfly plate body (202). When the mold is closed, the bottom of the limiting part (208) abuts against the lower mold (102).

5. An improved mold for footwear according to claim 4, characterized in that: The second guide structure (203) also includes a spring structure (210) sleeved on the outside of the bottom of the guide rod (207). The bottom of the spring structure (210) abuts against the limiting part (208). When the mold is closed, the top of the spring structure (210) abuts against the upper mold (101).

6. An improved mold for footwear according to claim 5, characterized in that: The bottom of the upper mold (101) is provided with a first spring groove (211) that matches the spring structure (210), and the lower mold (102) is provided with a second spring groove (212) that matches the spring structure (210).

7. An improved mold for footwear according to claim 6, characterized in that: A pad (213) is placed in both the first spring groove (211) and the second spring groove (212).

8. An improved mold for footwear according to claim 4, characterized in that: The fixing part (209) includes a limiting protrusion ring (214) abutting against the bottom surface of the butterfly plate body (202), a threaded rod (215) provided on the limiting protrusion ring (214), and a fastener (216) screwed to the threaded rod (215). The bottom surface of the fastener (216) abuts against the top surface of the butterfly plate body (202).

9. An improved mold for footwear according to claim 8, characterized in that: The butterfly plate body (202) is provided with a first limiting groove (217) that matches the limiting protrusion (214) and a second limiting groove (218) that matches the fastener (216).

10. An improved mold for footwear according to claim 1, characterized in that: There are two second molding areas (106). The lower mold (102) has a Y-shaped main channel (107) connecting the outside of the lower mold (102) on the upper surface between the two second molding areas (106). The two ends of the main channel (107) are respectively connected to V-shaped injection channels (108). One end of the injection channel (108) is connected to the main channel (107), and then extends downward to the lower mold (102) and bends upward. The other end of the injection channel (108) is connected to the second molding area (106).

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