Insole rear heel support structure and forming mold thereof

Abstract

The application relates to the technical field of shoe accessory, in particular to a shoe-pad rear-heel supporting structure and a forming die thereof, which comprises a bottom die, a middle die and a top die, the bottom die is rotationally connected with the middle die, the top die is rotationally connected with the bottom die, the middle die is located between the bottom die and the top die, a placing seat for placing a supporting plate is arranged on the bottom die, a through seat hole for the placing seat to pass through is arranged on one side of the middle die close to the bottom die, a palm-pad protrusion is arranged on one side of the top die close to the middle die, a bottom groove is arranged on the middle die, the through seat hole and the bottom groove are in communication, a surrounding ring is arranged on the middle die, the palm-pad protrusion, the bottom groove, the placing seat and the surrounding ring are enclosed to form a closed cavity for forming a rear palm pad in the state that the bottom die, the middle die and the top die are mutually overlapped, and a locking assembly is arranged on the bottom die. The application has the effect of improving the combination tightness between shoe-pad components.

Description

Technical Field

[0001] This application relates to the field of footwear accessories technology, and in particular to a heel support structure for insoles and its molding die. Background Technology

[0002] Insoles are widely used in the footwear industry, for health purposes, and for special functions; they are generally divided into two types: footwear factory-application insoles and market-commercial insoles. Footwear factory-application insoles are mainly designed to fit the outsole and midsole of shoes, creating corresponding shapes; size charts are made according to the last or upper, and the corresponding shapes are produced. Market-commercial insoles are products designed by developers and sold directly in the market.

[0003] In current insole technology, heel support and elasticity are key factors in improving wearing comfort. Insole production generally includes three parts: conveying, mold feeding, and heating. When it is necessary to produce insoles with composite functions, the existing method is to glue the various insole components together. However, insole components that are made separately and then combined may not be tightly bonded, and adjacent insoles may easily separate during use. Summary of the Invention

[0004] In order to improve the tightness of the connection between insole components and form a multi-component insole accessory, this application provides an insole heel support structure and its molding mold.

[0005] On the one hand, the insole heel support structure provided in this application adopts the following technical solution:

[0006] A heel support structure for an insole includes a heel pad, with a support plate and a heel elastic block at the bottom of the heel pad. The support plate and the heel elastic block are close to each other. The support plate is made of plastic, and the heel pad is formed by heat-blowing foaming.

[0007] By adopting the above technical solution, when the user walks, the heel elastic block can provide a shock-absorbing effect on the heel, improving walking comfort. The support plate can support the arch of the user's foot, reducing the collapse of the arch and reducing the occurrence of flat feet. Since the heel pad is foamed, the support plate and heel elastic block can be placed in the corresponding processing positions during foaming. After molding, the heel pad is tightly bonded to the support plate and heel elastic block, thereby improving the tightness of the connection between the insole components and forming a multi-part insole accessory.

[0008] On the other hand, the molding die for the heel support structure of the insole provided in this application adopts the following technical solution:

[0009] A molding die for a heel support structure of an insole includes a bottom mold, a middle mold, and a top mold. The bottom mold and the middle mold are rotatably connected, and the top mold and the bottom mold are rotatably connected. The middle mold is located between the bottom mold and the top mold. The bottom mold has a placement seat for placing a support plate. The middle mold has a through hole on the side near the bottom mold for the placement seat to pass through. The top mold has a heel pad protrusion on the side near the middle mold. The middle mold has a bottom groove, and the through hole communicates with the bottom groove. The middle mold has a retaining ring. When the bottom mold, the middle mold, and the top mold are closed together, the heel pad protrusion, the bottom groove, the placement seat, and the retaining ring form a closed cavity for forming the heel pad. The bottom mold has a locking assembly.

[0010] By adopting the above technical solution, when processing the heel pad, the support plate can be placed on top of the placement seat, and then the middle mold can be rotated to cover the bottom mold, so that the support plate and the placement seat pass through the seat hole. The heel elastic block is placed into the bottom groove, and then the raw material can be injected. The top mold is then covered on the middle mold to form a closed cavity. Heating causes the raw material to foam and form the heel pad. After the heel pad is formed, it can tightly connect the support plate and the heel elastic block, thereby improving the tightness of the product and forming a multi-part insole accessory.

[0011] Optionally, the bottom of the groove is provided with a spring block groove, which is close to the through hole.

[0012] By adopting the above technical solution, the spring block groove can be adapted to the shape of the heel spring block, and the processing position of the heel spring block can be standardized each time.

[0013] Optionally, the bottom groove is provided with a pressure frame, which is arranged around the opening of the through hole, and the inner diameter of the pressure frame is smaller than the inner diameter of the through hole.

[0014] By adopting the above technical solution, the pressure frame can be used to press on the rough edge of the support plate, thereby limiting the support plate and improving its stability. After the rear palm pad is formed, the support plate can be pushed out from the side of the middle mold away from the top mold through the through hole.

[0015] Optionally, the pressing frame has a receiving groove on the side near the through hole, and an opening on the side near the spring block groove. The opening of the pressing frame is connected to the receiving groove and the opening of the pressing frame is connected to the spring block groove.

[0016] By adopting the above technical solution, the pressure frame can not only limit the rough edges of the support plate, but also ensure that the rear palm pad is tightly bonded to the support plate after molding, and also facilitate the push-out of the support plate through the opening of the pressure frame.

[0017] Optionally, the locking assembly includes a support, a crank handle, and a pressure frame. The support is connected to the bottom mold, the crank handle is rotatably connected to the support, the pressure frame is rotatably connected to the support, the pressure frame passes through the crank handle, and a connecting rod is rotatably connected to the crank handle and the connecting rod is rotatably connected to the pressure frame.

[0018] By adopting the above technical solution, after the bottom mold, middle mold and top mold are closed together, the crank can be rotated so that the crank, connecting rod and pressure frame reach the mechanical dead point position, and the top mold is pressed, thereby improving the processing stability.

[0019] Optionally, a rotating rod is rotatably connected to the bottom mold, an alignment plate is provided on the side wall of the middle mold, an alignment groove is provided on the side wall of the alignment plate for the rotating rod to be inserted, an insertion post is slidably connected to the end of the rotating rod, and an insertion hole is provided on the alignment plate, the insertion hole being adapted to the insertion post.

[0020] By adopting the above technical solution, after the middle mold and the bottom mold are closed, the rotating rod can be rotated to enter the alignment groove, adjust the position of the middle mold and the bottom mold, and insert the plug into the plug hole to adjust the middle mold and the bottom mold to the alignment state, thereby improving the processing accuracy.

[0021] Optionally, a number of positioning blocks are symmetrically arranged on the side of the top mold near the middle mold, and positioning grooves are opened on the side wall of the middle mold. The number of positioning grooves is the same as the number of positioning blocks, and the side walls of the positioning blocks that are close to each other are flush with the groove walls of the positioning grooves.

[0022] By adopting the above technical solution, after the middle mold and the top mold cover each other, the positioning block is inserted into the positioning groove, which can make the middle mold and the top mold align with each other, adjust the middle mold and the top mold to the aligned state, and improve the processing accuracy.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The heel spring block provides cushioning for the heel, improving walking comfort. The support plate supports the arch of the foot, reducing arch collapse and flat feet. Because the heel pad is foam-molded, the support plate and heel spring block can be placed in the corresponding processing positions during foaming. After molding, the heel pad is tightly bonded to the support plate and heel spring block, thereby improving the tightness of the connection between the insole components and forming a multi-component insole accessory.

[0025] 2. When processing the heel pad, the support plate can be placed on top of the placement seat, and then the middle mold cover can be rotated to fit onto the bottom mold, so that the support plate and the placement seat pass through the seat hole. The heel elastic block can be placed into the bottom groove, and then the raw material can be injected. The top mold cover can be fitted onto the middle mold to form a closed cavity. Heating causes the raw material to foam and form the heel pad. After the heel pad is formed, it can tightly connect the support plate and the heel elastic block, thereby improving the tightness of the product and forming a multi-part shoe insole accessory.

[0026] 3. The edge pressing frame can be used to press on the rough edges of the support plate, thereby limiting the support plate and improving its stability. After the rear palm pad is formed, the support plate can be pushed out from the side of the middle mold away from the top mold through the through hole. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the rearfoot support structure in an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the overall structure of the mold in the embodiments of this application.

[0029] Figure 3 This is a schematic diagram of the bottom mold and the middle mold fitting together in an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the locking component in an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the pressure border in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Rear foot pad; 11. Support plate; 12. Heel spring block; 2. Bottom mold; 21. Placement seat; 3. Middle mold; 31. Through seat hole; 32. Bottom groove; 33. Spring block groove; 34. Pressing edge; 35. Receiving groove; 36. Positioning groove; 4. Top mold; 41. Foot pad protrusion; 42. Positioning block; 5. Support; 51. Handle; 52. Pressing frame; 53. Connecting rod; 6. Rotating rod; 61. Fixing plate; 62. Insertion post; 63. Pull plate; 64. Spring; 7. Alignment plate; 71. Alignment groove; 72. Insertion hole. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses a heel support structure for insoles.

[0036] Reference Figure 1A heel support structure for an insole includes a heel pad 1, which is used to connect to the heel position at the bottom of the insole or to be placed inside the shoe. The heel pad 1 is an EVA pad. The bottom of the heel pad 1 is provided with a support plate 11 and a heel elastic block 12. The support plate 11 and the heel elastic block 12 are close to each other. The support plate 11 is a curved plate, which arches towards the heel pad 1. The support plate 11 is a plastic plate and is formed by injection molding. The heel pad 1 is formed by heat foaming. The heel pad 1 is bonded to the support plate 11 and the heel elastic block 12 by foaming. The position of the support plate 11 corresponds to the arch position of the foot. The heel elastic block 12 is a TPU block and its position corresponds to the heel position of the heel pad 1. The bottom of the heel elastic block 12 is provided with anti-slip texture.

[0037] When in use, the heel pad 1 can be attached to the heel of the insole or placed inside the shoe. When the user walks, the heel elastic block 12 can provide shock absorption to the heel, improving walking comfort. The support plate 11 can support the arch of the user's foot, reducing the collapse of the arch and the occurrence of flat feet. The heel pad 1 can be formed by heating and foaming raw materials. During heating and foaming, the support plate 11 and the heel elastic block 12 can be placed in the processing position. After molding, the heel pad 1 is tightly bonded to the support plate 11 and the heel elastic block 12 respectively, and can be installed in the insole, thus forming a multi-part insole that can realize a variety of composite functions.

[0038] This application also discloses a molding die for a heel support structure of an insole.

[0039] Reference Figure 2 and Figure 3 A molding die for a heel support structure of an insole includes a bottom mold 2, a middle mold 3, and a top mold 4. The bottom mold 2 and the middle mold 3 are rotatably connected by a pivot, and the top mold 4 and the bottom mold 2 are also rotatably connected by a pivot. The middle mold 3 is located between the bottom mold 2 and the top mold 4. A placement seat 21 for placing a support plate 11 is provided on the side of the bottom mold 2 near the middle mold 3. The top of the placement seat 21 is adapted to the shape of the support plate 11. A through hole 31 for the placement seat 21 to pass through is provided on the side of the middle mold 3 near the bottom mold 2. The shape of the through hole 31 is adapted to the shape of the placement seat 21 and its shape. The placement seat 21 moves along the trajectory of the bottom mold 2 and the middle mold 3 when they rotate relative to each other. The top mold 4 has a palm pad protrusion 41 on the side near the middle mold 3, the shape of which is adapted to the top side shape of the rear palm pad 1. The middle mold 3 has a bottom groove 32 on the side near the top mold 4, and the through hole 31 is connected to the bottom groove 32. The middle mold 3 has a surrounding ring on the side near the top mold 4, enclosing the bottom groove 32. When the bottom mold 2, the middle mold 3, and the top mold 4 are closed together, the palm pad protrusion 41, the bottom groove 32, and the placement seat 21 form a closed cavity for the rear palm pad 1. (Refer to...) Figure 4The bottom mold 2 is equipped with a locking component, which is used to lock the bottom mold 2, the middle mold 3 and the top mold 4 in the closed state.

[0040] When the heel pad 1 needs to be processed, the support plate 11 and the heel elastic block 12 can be pre-formed. The middle mold 3 and the top mold 4 are rotated upward to move away from the bottom mold 2. The support plate 11 is placed on the top of the placement seat 21. Then, the middle mold 3 is rotated to cover the bottom mold 2, so that the support plate 11 and the placement seat 21 pass through the through hole 31. After passing through, the support plate 11 can be located at the bottom of the bottom groove 32. The heel elastic block 12 is placed into the bottom groove 32. Then, the raw material can be injected into the bottom groove 32. The top mold 4 is rotated to cover the middle mold 3 to form a closed cavity. The bottom mold 2, the middle mold 3 and the top mold 4 can be locked together by the locking assembly. The raw material can be heated to foam and form the heel pad 1. Since the support plate 11 and the heel elastic block 12 are in direct contact with the raw material during the foaming process, the heel pad 1 can be tightly attached to the support plate 11 and the heel elastic block 12 after it is formed, thereby improving the tightness of the product and forming a multi-part insole accessory that can realize multiple composite functions.

[0041] Reference Figure 3 The bottom of the groove 32 is provided with a spring block groove 33, which is used to place the heel elastic block 12. The bottom of the spring block groove 33 is adapted to the heel elastic block 12 and the anti-slip texture of the heel elastic block 12. The spring block groove 33 is close to the seat hole 31.

[0042] During processing, the spring block groove 33 can be adapted to the shape of the heel spring block 12, so that the processing position of the heel spring block 12 is fixed each time, thereby improving the mass production quality of the product.

[0043] Reference Figure 2 and Figure 5 The bottom groove 32 is provided with a pressing frame 34, which is arranged around the side of the end of the through hole 31 away from the bottom mold 2. The pressing frame 34 is used to limit the rough edges of the support plate 11. The inner diameter of the pressing frame 34 is smaller than the inner diameter of the through hole 31.

[0044] When processing the rear palm pad 1, a rough edge is left around the edge of the support plate 11. During processing, the pressing frame 34 can press on the rough edge of the support plate 11, so that the placement seat 21 and the pressing frame 34 clamp the support plate 11, thereby limiting the position of the support plate 11, improving the stability of the support plate 11 and the product quality. After the rear palm pad 1 is formed, the top mold 4 and the middle mold 3 can be opened, and the support plate 11 can be pushed out from the side of the middle mold 3 away from the top mold 4 through the through hole 31, thus completing the material discharge.

[0045] The pressure frame 34 has a receiving groove 35 on the side near the through hole 31, and an opening on the side near the spring block groove 33. The opening of the pressure frame 34 is connected to the receiving groove 35 and the opening of the pressure frame 34 is connected to the spring block groove 33. The groove wall of the receiving groove 35 is flush with the hole wall of the through hole 31.

[0046] The shape and size of the support plate 11 can be matched with the inner diameter of the pressure frame 34 during production, thus allowing for the provision of rough edges on the support plate 11. After the support plate 11 is placed on the placement seat 21, the middle mold 3 is placed on the bottom mold 2, and the rough edges of the support plate 11 can enter the receiving groove 35, thereby limiting the rough edges of the support plate 11 by the pressure frame 34. This not only positions the support plate 11 but also ensures that the support plate 11 is tightly bonded to the rear palm pad 1. It also facilitates pushing or pulling out the support plate 11 through the opening of the pressure frame 34, thereby removing the product.

[0047] Reference Figure 2 and Figure 4 The locking assembly includes a support 5, a rocker arm 51, and a pressure frame 52. The support 5 is connected to the side wall of the bottom mold 2. The rocker arm 51 is rotatably connected to the top of the support 5. The pressure frame 52 is rotatably connected to the support 5. The end of the pressure frame 52 away from the support 5 passes through the rocker arm 51. The rocker arm 51 has a through hole for the pressure frame 52 to pass through. A connecting rod 53 is rotatably connected to the rocker arm 51. One end of the connecting rod 53 is rotatably connected to the rocker arm 51, and the end of the connecting rod 53 away from the rocker arm 51 is rotatably connected to the pressure frame 52. When the rotation point between the rocker arm 51 and the support 5 and the two rotation points at both ends of the connecting rod 53 form a three-point collinearity, the rocker arm 51, the connecting rod 53, and the pressure frame 52 are in the mechanical dead point position. When the bottom mold 2, the middle mold 3, and the top mold 4 are closed together, the pressure frame 52, which is in the mechanical dead point position, presses against the side of the top mold 4 away from the middle mold 3, so that the bottom mold 2, the middle mold 3, and the top mold 4 are clamped together.

[0048] A rotating rod 6 is rotatably connected to the side wall of the bottom mold 2. An alignment plate 7 is provided on the side wall of the middle mold 3. An alignment groove 71 for inserting the rotating rod 6 is opened on the side of the alignment plate 7 away from the middle mold 3. The shape of the alignment groove 71 is adapted to the shape of the rotating rod 6. A fixing plate 61 is provided at the end of the rotating rod 6. A plug-in post 62 is slidably connected on the fixing plate 61. The extension direction and sliding direction of the plug-in post 62 are consistent with the extension direction of the rotating rod 6. A pull plate 63 is installed at the end of the plug-in post 62 away from the bottom mold 2. A spring 64 is provided between the pull plate 63 and the fixing plate 61. The two ends of the spring 64 are respectively connected to the pull plate 63 and the fixing plate 61. A plug-in hole 72 is opened on the alignment plate 7. The shape of the plug-in hole 72 is adapted to the shape of the plug-in post 62.

[0049] In actual production, due to the possible gaps in the rotating shaft of the rotating connection, the middle mold 3 and the bottom mold 2 may not be able to be completely aligned. After the middle mold 3 and the bottom mold 2 are fitted together, the rotating rod 6 and the pulling plate 63 can be rotated to make the rotating rod 6 rotate into the alignment groove 71, adjust the position of the middle mold 3 and the bottom mold 2, and make the insertion post 62 and the insertion hole 72 aligned. Then, the insertion post 62 is inserted into the insertion hole 72, thereby adjusting the middle mold 3 and the bottom mold 2 to an aligned state. The insertion post 62 and the insertion hole 72 limit the middle mold 3 and the bottom mold 2, reduce the relative lateral displacement of the middle mold 3 and the bottom mold 2 in the horizontal direction, and improve the processing accuracy and stability.

[0050] A number of positioning blocks 42 are symmetrically arranged on the side of the top mold 4 near the middle mold 3. There are two positioning blocks 42. The symmetrical plane between the two positioning blocks 42 is perpendicular to the rotation axis of the top mold 4 and the bottom mold 2. The two side walls of the middle mold 3 that are far apart from each other are respectively provided with positioning grooves 36 for the positioning blocks 42 to be inserted. The number of positioning grooves 36 is the same as the number of positioning blocks 42. The side walls of the two positioning blocks 42 that are close to each other are flush with the groove walls of the positioning grooves 36.

[0051] After the middle mold 3 and the top mold 4 are closed together, the positioning block 42 is inserted into the positioning groove 36. The side walls of the two positioning blocks 42 that are close to each other abut against the groove walls of the positioning groove 36 that are close to each other, thereby clamping the middle mold 3 and aligning the middle mold 3 and the top mold 4 with each other, reducing the relative lateral displacement of the middle mold 3 and the top mold 4 in the horizontal direction.

[0052] The implementation principle of the heel support structure and its molding die of an insole embodiment of this application is as follows: When the heel pad 1 needs to be processed, the support plate 11 and the heel elastic block 12 can be pre-processed. The middle mold 3 and the top mold 4 are rotated upward away from the bottom mold 2, and the support plate 11 is placed on the top of the placement seat 21. Then, the middle mold 3 is rotated to cover the bottom mold 2, so that the support plate 11 and the placement seat 21 pass through the through hole 31, limiting the support plate 11. The heel elastic block 12 can be placed into the elastic block groove 33, and the insertion post 62 and the insertion hole 72 are connected to make the support plate 11 pass through the through hole 31. The middle mold 3 and the bottom mold 2 are adjusted to be aligned, and then the raw material can be injected into the bottom groove 32. The top mold 4 is rotated to cover the middle mold 3 to form a closed cavity. The bottom mold 2, the middle mold 3 and the top mold 4 can be locked together by the locking assembly, so that the raw material can be heated to foam and form the heel pad 1. Since the support plate 11 and the heel elastic block 12 are in direct contact with the raw material during the foaming process, the heel pad 1 can be tightly attached to the support plate 11 and the heel elastic block 12 after it is formed, thereby improving the tightness of the product and forming a multi-part insole accessory.

[0053] The above are all preferred embodiments of this application. These embodiments are only explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A heel support structure for an insole, characterized in that, Includes a heel pad, the bottom of which is provided with a support plate and a heel spring block, the support plate and the heel spring block are close to each other, the support plate is a plastic plate, and the heel pad is formed by heat foaming.

2. A molding die for a heel support structure of an insole, used in processing the heel support structure of an insole as described in claim 1, characterized in that, The device includes a bottom mold, a middle mold, and a top mold. The bottom mold and the middle mold are rotatably connected, and the top mold and the bottom mold are rotatably connected. The middle mold is located between the bottom mold and the top mold. The bottom mold has a placement seat for placing a support plate. The middle mold has a through hole on the side near the bottom mold for the placement seat to pass through. The top mold has a palm pad protrusion on the side near the middle mold. The middle mold has a bottom groove, and the through hole communicates with the bottom groove. The middle mold has a retaining ring. When the bottom mold, the middle mold, and the top mold are closed together, the palm pad protrusion, the bottom groove, the placement seat, and the retaining ring form a closed cavity for forming the rear palm pad. The bottom mold has a locking assembly.

3. The molding die for a heel support structure of an insole according to claim 2, characterized in that, The bottom of the groove is provided with a spring block groove, which is close to the through hole.

4. The molding die for a heel support structure of an insole according to claim 3, characterized in that, The bottom groove is provided with a pressure frame, which is arranged around the opening of the through hole. The inner diameter of the pressure frame is smaller than the inner diameter of the through hole.

5. The molding die for a heel support structure of an insole according to claim 4, characterized in that, The pressure frame has a receiving groove on the side near the through hole, and an opening on the side near the spring block groove. The opening of the pressure frame is connected to the receiving groove and the opening of the pressure frame is connected to the spring block groove.

6. The molding die for a heel support structure of an insole according to claim 2, characterized in that, The locking assembly includes a support, a rocker handle, and a pressure frame. The support is connected to the bottom mold, the rocker handle is rotatably connected to the support, the pressure frame is rotatably connected to the support, the pressure frame passes through the rocker handle, and a connecting rod is rotatably connected to the rocker handle and the connecting rod is rotatably connected to the pressure frame.

7. The molding die for a heel support structure of an insole according to claim 6, characterized in that, A rotating rod is rotatably connected to the bottom mold. An alignment plate is provided on the side wall of the middle mold. An alignment groove is provided on the side wall of the alignment plate for the rotating rod to be inserted. A plug-in post is slidably connected to the end of the rotating rod. A plug-in hole is provided on the alignment plate, and the plug-in hole is adapted to the plug-in post.

8. The molding die for a heel support structure of an insole according to claim 7, characterized in that, The top mold has several positioning blocks symmetrically arranged on the side near the middle mold. The side wall of the middle mold has positioning grooves. The number of positioning grooves is the same as the number of positioning blocks. The side walls of the positioning blocks that are close to each other are flush with the groove walls of the positioning grooves.

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