Split type shoe sole forming mold

Abstract

The utility model provides a split type sole forming die which comprises an upper die and a lower die, a first cavity is formed in the upper side face of the lower die, a middle die is arranged between the upper die and the lower die, a first male die capable of extending into the first cavity is arranged on the lower side face of the middle die, and the first male die and the inner wall of the first cavity are arranged at intervals. The middle mold is composed of a front mold body and a rear mold body, the contact face of the front mold body and the rear mold body is an inclined face, and when the front mold body is subjected to downward pressure, the front mold body can apply backward thrust to the rear mold body through the inclined face. When pressure is applied to the whole mold from the upper side of the upper mold, the pressure acts on the middle mold through the upper mold, the middle mold is composed of the front mold and the rear mold, and the contact face of the front mold and the rear mold is the inclined face, so that when the front mold is subjected to downward pressure, the front mold can apply backward thrust to the rear mold through the inclined face, and the rear mold can be pushed backwards through the inclined face. And forming pressure in the front-back direction can be formed on the rear upper position, corresponding to the shoe sole, of the rear side of the first cavity through the pushing force.

Description

Technical Field

[0001] This utility model relates to the field of shoe sole forming mold technology, specifically to a split shoe sole forming mold. Background Technology

[0002] In the footwear industry, sole molding has become one of the most widely used processes in sole production.

[0003] The principle of this compression molding process is as follows: the shoe material blank is placed between the upper and lower molds of the molding die, and high temperature and high pressure are applied by special molding equipment, so that the shoe material blank undergoes physical and chemical changes such as melting and vulcanization inside the mold cavity, fully conforming to the shape of the mold cavity, and finally cooling and molding into a shoe sole product that meets the design size and appearance requirements.

[0004] refer to Figure 1 As shown, most common shoe soles on the market have a simple, almost flat structure with no complex protrusions or depressions. For this type of sole, the traditional upper and lower opening mold can meet the molding requirements. By precisely matching the upper and lower molds and applying molding pressure in the upper and lower directions, the shoe material blank can be evenly pressed and molded. The molding process is simple and can ensure basic molding quality.

[0005] refer to Figure 2 As shown, the rear of the sole has an upwardly protruding heel counter 19, which is used to better fit the upper of the shoe, improve the shoe's wrap-around and support, and the inner side of the heel counter 19 has a concave structure to adapt to the foot contour and further optimize the wearing experience.

[0006] However, for the aforementioned sole with a recessed heel counter, the existing conventional top-and-bottom opening molding die has significant technical defects and cannot meet its molding requirements. Because the conventional die can only generate molding pressure in the vertical direction through the relative movement of the upper and lower dies, it cannot apply effective molding pressure in the front-to-back direction to the recessed structure on the inner side of the heel counter 19, resulting in the shoe material blank being unable to fully fill the recessed cavity on the inner side of the heel counter 19. Utility Model Content

[0007] In view of the problems pointed out in the background art, this utility model proposes a split shoe sole forming mold to solve the above-mentioned technical problems.

[0008] The technical solution of this utility model is implemented as follows:

[0009] A split-type shoe sole forming mold includes an upper mold and a lower mold, wherein a cavity is provided on the upper side of the lower mold.

[0010] A middle mold is provided between the upper mold and the lower mold. A punch that can extend into the cavity is provided on the lower side of the middle mold. The punch and the inner wall of the cavity are spaced apart.

[0011] The middle mold consists of two parts: the front mold and the rear mold. The contact surface between the front mold and the rear mold is an inclined surface. When the front mold is subjected to downward pressure, the front mold can apply a backward thrust to the rear mold through the inclined surface.

[0012] The present invention is further configured such that a cavity two is provided on the upper side of the middle mold, and a punch two that can extend into the cavity two is provided on the lower side of the upper mold, with the punch two and the inner walls of the cavity two being spaced apart.

[0013] The present invention is further configured such that the lower mold and the upper mold are hinged at the rear, and the middle mold is detachable.

[0014] The present invention is further configured such that a hinge portion is provided on the rear side of the lower mold, and a hinge hole is provided on the hinge portion;

[0015] The upper mold has hinge plates on the left and right sides of its rear end, and the hinge plates have connecting grooves corresponding to the hinge holes, and also include hinge shafts that pass through the hinge holes and connecting grooves.

[0016] The upper mold can be fastened to the middle mold and the lower mold. When switching between the upper mold and the middle mold fastening state and the upper mold and the lower mold fastening state, the hinge shaft moves in the connecting groove.

[0017] The present invention is further configured such that a positioning post is provided on the upper side of the lower mold, and positioning holes corresponding to the positioning post are provided on the middle mold and the upper mold respectively.

[0018] The present invention is further provided with handles on the left and right sides of the front mold.

[0019] The present invention is further provided with handles on the left and right sides of the rear mold.

[0020] The present invention is further provided that the front sides of the upper mold and the lower mold are respectively provided with handles.

[0021] The present invention is further configured such that the lower side of the middle mold can form a sealing fit with the upper side of the lower mold.

[0022] The present invention is further configured such that the lower side of the upper mold can form a sealing fit with the upper side of the middle mold, and the lower side of the upper mold can form a sealing fit with the upper side of the lower mold.

[0023] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0024] The split-type shoe sole molding mold provided by this utility model consists of a lower mold, a middle mold, and an upper mold. The middle mold is located between the lower mold and the upper mold. When pressure is applied to the entire mold on the upper side of the upper mold, the pressure is applied to the middle mold through the upper mold. Since the middle mold consists of a front mold and a rear mold, and the contact surface between the front mold and the rear mold is an inclined surface, when the front mold is subjected to downward pressure, the front mold can apply a backward thrust to the rear mold through the inclined surface. This thrust can form a molding pressure along the front-back direction on the rear side of the cavity corresponding to the heel position of the shoe sole.

[0025] The mold usage process is as follows:

[0026] Open the mold, put the shoe material blank into cavity one on the lower mold, close the middle mold, place the middle mold on the upper side of the lower mold, put the shoe material blank into cavity two on the middle mold, close the upper mold, and then put the entire mold into a special molding equipment to apply high temperature and high pressure; after the sole is formed, cool and open the mold to obtain the formed sole.

[0027] The middle mold is detachable: when the middle mold is in use, it is fastened to the upper side of the lower mold, and the upper mold is fastened to the upper side of the middle mold; when the middle mold is not in use, the upper mold is directly fastened to the upper side of the lower mold.

[0028] First, use the middle mold to obtain two shoe soles through cavity one and cavity two; then remove the middle mold and put the two shoe soles into cavity one, then close the upper mold to fix and bond the two shoe soles placed in cavity one. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a typical shoe sole.

[0031] Figure 2 This is a structural diagram of a shoe sole with a heel counter.

[0032] Figure 3 This is a schematic diagram of the front structure of this utility model.

[0033] Figure 4 This is an exploded view of the front upper mold of this utility model.

[0034] Figure 5 This is a schematic diagram of the rear structure of this utility model.

[0035] Figure 6 This is an exploded view of the rear upper mold structure of this utility model.

[0036] Figure 7 This is an exploded view of the present invention. Figure 1 .

[0037] Figure 8 This is an exploded view of the present invention. Figure 2 .

[0038] Figure 9 This is a schematic diagram of the structure of the mold in this utility model.

[0039] Figure 10 This is an exploded view of the mold in this utility model.

[0040] The following are the labels in the attached diagram: Upper mold 1, Lower mold 2, Cavity 1 3, Punch 1 4, Front mold 5, Rear mold 6, Inclined surface 7, Cavity 2 8, Punch 2 9, Hinge part 10, Hinge hole 11, Hinge plate 12, Connecting groove 13, Hinge shaft 14, Positioning pin 15, Positioning hole 16, Handle 17, Pull handle 18, Rear side 19. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] For reference as follows Figures 1-10 The present invention will be described as follows:

[0043] Example: A split-type shoe sole molding mold is used to solve the molding defect problem caused by insufficient molding pressure in the front and rear directions during the molding process of shoe soles with a heel counter structure.

[0044] It includes an upper mold 1 and a lower mold 2, both of which are rectangular structures. This structural design ensures the overall structural stability of the mold, facilitates positioning and matching with specialized molding equipment, and improves the ease of operation during the mold opening and closing process.

[0045] The upper side of the lower mold 2 is provided with a recessed cavity 3. The shape and size of the cavity 3 are precisely machined according to the design parameters of the lower shoe sole, and it is used to provide a basic cavity for the molding of the lower shoe sole.

[0046] A middle mold is provided between the upper mold 1 and the lower mold 2. The middle mold has a rectangular structure. Its dimensions are adapted to the dimensions of the upper mold 1 and the lower mold 2 to ensure the coaxiality and sealing of the mold after the whole mold is snapped together.

[0047] The lower side of the middle mold is provided with a punch 4 that can extend into the cavity 3. The shape of the punch 4 matches the inner wall contour of the cavity 3, and the punch 4 and the inner wall of the cavity 3 are spaced apart. The size of the gap is set according to the thickness parameter of the lower shoe sole. The two cooperate to form the molding cavity of the lower shoe sole, and the shoe material blank completes the molding of the lower shoe sole in the cavity.

[0048] The lower side of the middle mold can form a sealing fit with the upper side of the lower mold 2. This sealing fit can prevent the shoe material blank from overflowing after melting during the molding process, ensuring the sealing of the molding process, and thus improving the molding quality of the shoe sole.

[0049] The middle mold adopts a split structure design, consisting of two parts: the front mold 5 and the rear mold 6. The two parts are detachably connected, and their contact surface is designed as a slope 7. The function of this slope 7 is to convert the downward pressure applied by the upper mold 1 into the backward pushing force of the front mold 5 on the rear mold 6, thereby providing front-to-back forming pressure for the concave part of the heel counter of the sole, solving the technical defect of existing molds that can only provide vertical pressure.

[0050] The middle mold is fastened to the upper side of the upper mold 1. When the front mold 5 and the rear mold 6 are subjected to downward pressure, the front mold 5 can exert a backward thrust on the rear mold 6 through the inclined surface 7.

[0051] The upper side of the middle mold has a recessed cavity 8. The shape and size of the cavity 8 are processed according to the design parameters of the upper shoe sole and match the punch 9 of the upper mold 1.

[0052] The lower side of the upper mold 1 is provided with a punch 2 9 that can extend into the cavity 2 8. The shape of the punch 2 9 matches the inner contour of the upper shoe sole, and its dimensional accuracy follows the design requirements of the upper shoe sole. It is used to cooperate with the cavity 2 8 of the middle mold to form the molding space of the upper shoe sole.

[0053] The inner walls of the punch 2 9 and the cavity 2 8 are spaced apart, and the spacing is consistent with the thickness of the upper shoe sole. The two work together to form the molding cavity of the upper shoe sole, which is used for the molding of the upper shoe sole.

[0054] The lower side of the upper mold 1 can form a sealed fit with the upper side of the middle mold. This sealed fit can prevent the shoe material blank from overflowing after melting during the molding process, ensuring the sealing of the molding process, thereby improving the molding quality of the shoe sole.

[0055] The lower side of the upper mold 1 can form a sealed fit with the upper side of the lower mold 2, or it can be a non-sealed fit.

[0056] The middle mold is detachable.

[0057] The lower mold 2 and the upper mold 1 are hinged at the rear. This hinge structure ensures that the upper mold 1 can rotate around the hinge axis 14 to realize the opening and closing operation of the mold, while also meeting the switching requirements between the use and non-use of the middle mold.

[0058] The hinge structure between the lower mold 2 and the upper mold 1 is as follows:

[0059] A hinge part 10 is fixedly provided on the rear side of the lower mold 2. A hinge hole 11 is provided on the hinge part 10 along the left and right direction. There are two hinge parts 10, and the two hinge parts 10 are arranged at intervals on the left and right.

[0060] Hinges 12 are fixedly provided on the left and right sides of the rear end of the upper mold 1. The hinge plates 12 are provided with connecting grooves 13 corresponding to the hinge holes 11. The connecting grooves 13 adopt a long strip structure design, and their length is set according to the stroke of the upper mold 1 moving up and down, allowing the hinge shaft 14 to move in the vertical direction within the connecting grooves 13.

[0061] It also includes a hinge shaft 14 that passes through the hinge hole 11 and the connecting groove 13. The hinge shaft 14 is fixedly connected to the hinge part 10. The upper mold 1 can rotate around the hinge shaft 14 to complete the opening and closing of the mold.

[0062] The upper mold 1 can be fastened to the middle mold and the lower mold 2. When the middle mold is in use, the upper mold 1 is fastened to the middle mold. When the middle mold is not in use, the upper mold 1 is fastened to the lower mold.

[0063] When the mold switches between the use and non-use states of the middle mold, the upper mold 1 needs to move up and down to adapt to different engagement heights because the middle mold has a certain thickness. At this time, the hinge shaft 14 can move vertically in the connecting groove 13 to ensure that the upper mold 1 can be smoothly engaged with the middle mold or the lower mold 2, thus ensuring a smooth switch between the two use states.

[0064] To ensure positioning accuracy during mold engagement and prevent misalignment that could lead to dimensional deviations in the sole molding process, the lower mold 2 has positioning pins 15 on its upper side, while the middle mold and upper mold 1 each have positioning holes 16 corresponding to the positioning pins 15. When the molds are engaged, the positioning pins 15 are inserted into the corresponding positioning holes 16, achieving precise positioning of the upper mold 1, middle mold, and lower mold 2, thus ensuring the dimensional accuracy of the molding cavity.

[0065] To facilitate the disassembly and handling of the intermediate mold, handles 17 are fixedly installed on the left and right sides of the front mold 5, and handles 17 are also fixedly installed on the left and right sides of the rear mold 6. The handles 17 are made of high-strength material and are fixed to the front mold 5 and the rear mold 6 by welding. Operators can easily lift the front mold 5 or the rear mold 6 through the handles 17 to realize the installation and disassembly of the intermediate mold.

[0066] To facilitate the opening and closing of the upper mold 1 and the lower mold 2, handles 18 are fixedly installed on the front side of the upper mold 1 and the lower mold 2 respectively. The structure of the handles 18 is ergonomically designed and easy for operators to hold. By pulling the handles 18, the upper mold 1 can be rotated around the hinge shaft 14, or the lower mold 2 can be pushed to adjust its position, thus improving the convenience of mold operation.

[0067] The working principle of this utility model mold lies in the fact that the downward pressure applied by the upper mold is converted into the backward thrust of the rear mold through the inclined surface structure of the split middle mold, thereby applying front-to-back forming pressure to the concave part of the heel counter of the shoe sole, thus solving the technical defects of existing molds. The specific principle is as follows:

[0068] When the mold is in operation and the middle mold is in use, the upper mold 1 is fastened to the upper side of the middle mold. A specialized molding machine applies downward high temperature and pressure to the upper side of the upper mold 1. This pressure is transmitted through the upper mold 1 to the front mold 5 and the rear mold 6 of the middle mold. Since the contact surface between the front mold 5 and the rear mold 6 is an inclined plane 7, the front mold 5, under downward pressure, applies a force along the tangent of the inclined plane 7 to the rear mold 6. This force can be decomposed into a downward component and a backward component. The backward component causes the rear mold 6 to move backward, applying molding pressure in the front-to-back direction to the area corresponding to the heel counter of the cavity 3. Combined with the vertical pressure applied by the upper and lower molds, this ensures the full filling of the recessed area of ​​the heel counter, guaranteeing the quality of the sole molding.

[0069] Furthermore, the mold achieves flexible switching between two usage states through the cooperation of the hinge structure and the positioning structure: when the middle mold is in use, the positioning pin 15 is inserted into the positioning hole 16 of the middle mold to achieve precise positioning of the middle mold and the lower mold 2. The upper mold 1 is fastened to the middle mold, and the upper shoe sole forming cavity is formed by the cooperation of the second punch 9 and the second cavity 8. The first punch 4 and the first cavity 3 are cooperated to form the lower shoe sole forming cavity. When the middle mold is not in use, after the middle mold is removed, the positioning hole 16 of the upper mold 1 directly cooperates with the positioning pin 15 of the lower mold 2, and the upper mold 1 is fastened to the lower mold 2. At this time, the second punch 9 of the upper mold 1 can directly cooperate with the first cavity 3 of the lower mold 2 to complete the bonding operation of the upper and lower shoe soles.

[0070] The usage process of this utility model mold:

[0071] Upper and lower sole molding stages:

[0072] The first step is the mold opening and closing operation: The operator pulls the handle 18 on the front side of the upper mold 1 to make the upper mold 1 rotate upward around the hinge shaft 14 and open the mold. At this time, the hinge shaft 14 moves upward in the connecting groove 13 to ensure that the upper mold 1 can be fully opened without affecting the installation of the middle mold and the placement of the blank.

[0073] The second step is to place the lower sole blank: Place the preset amount of shoe material blank (rubber, EVA, TPR, etc. can be selected according to the different materials of the sole) into the cavity 3 of the lower mold 2. The amount of blank is calculated according to the volume of the sole to ensure that the blank can fully fill the molding cavity and avoid material shortage or overflow.

[0074] The third step is the installation of the intermediate mold: The operator uses the handles 17 on both sides of the front mold 5 and the rear mold 6 to assemble the front mold 5 and the rear mold 6 into a complete intermediate mold, ensuring that the inclined surfaces 7 of the two are tightly fitted without gaps. Then, the assembled intermediate mold is placed on the upper side of the lower mold 2, so that the positioning pins 15 on the lower mold 2 are inserted into the positioning holes 16 of the intermediate mold, achieving precise positioning of the intermediate mold and the lower mold 2, while ensuring that the lower side of the intermediate mold is tightly fitted with the upper side of the lower mold 2 to form a sealed fit.

[0075] The fourth step is to place the upper sole blank: Place the preset amount of shoe material blank into the cavity 28 of the middle mold. The amount of blank is matched with the volume of the upper sole to ensure that the thickness and size of the upper sole after molding meet the design requirements.

[0076] Step 5: Mold engagement and molding: The operator pushes the upper mold 1 downwards around the hinge shaft 14 using the handle 18, causing the upper mold 1 to engage with the upper side of the middle mold. At this time, the positioning hole 16 of the upper mold 1 cooperates with the positioning pin 15 of the middle mold, achieving precise positioning of the upper mold 1 and the middle mold, and the lower side of the upper mold 1 forms a sealing fit with the upper side of the middle mold. The entire mold with engagement completed is placed into a special molding equipment. The equipment applies a preset high temperature and high pressure to the upper mold 1, causing the shoe material blanks in cavity 1 3 and cavity 2 8 to undergo a melting and vulcanization reaction, fully filling the molding cavity. This state is maintained for a preset time, completing the molding of the upper and lower shoe soles.

[0077] The upper and lower soles are fixed and bonded together.

[0078] Step 1, Mold Cooling and Opening: After compression molding is completed, remove the mold from the molding equipment and allow it to cool naturally or using a dedicated cooling device to ensure that the sole will not deform due to excessive temperature after molding. After cooling, pull the handle 18 of the upper mold 1 to open the upper mold 1 and remove the upper sole formed in cavity 2 8; then, use the handle 17 to disassemble the front mold 5 and the rear mold 6 respectively, and remove the lower sole formed in cavity 1 3.

[0079] The second step is the removal and adjustment of the middle mold: the disassembled front mold 5 and rear mold 6 are moved to the designated positions to complete the removal of the middle mold. At this time, the upper mold 1 is pushed to rotate downwards so that the positioning hole 16 of the upper mold 1 engages with the positioning pin 15 of the lower mold 2. The upper mold 1 is directly fastened to the upper side of the lower mold 2. The position of the upper mold 1 is adjusted to ensure that the lower side of the upper mold 1 and the upper side of the lower mold 2 form a sealed fit. At this time, the hinge shaft 14 moves downwards in the connecting groove 13 to adapt to the fastening height without the middle mold.

[0080] The third step is to bond the upper and lower soles: Place the molded lower sole into the cavity 3 of the lower mold 2, ensuring that the lower sole fits tightly against the inner wall of the cavity 3; then apply the pre-set adhesive to the bonding surfaces of the upper and lower soles, and accurately place the upper sole on the upper side of the lower sole, adjusting the position to ensure that the upper and lower soles are aligned and without misalignment.

[0081] The fourth step is bonding and fixing: push the upper mold 1 to snap onto the lower mold 2, put the entire mold back into the special molding equipment, apply the preset pressure and temperature, maintain the preset time, so that the upper and lower soles are fixed and bonded by the adhesive. After bonding is completed, cool and open the mold, take out the complete molded sole, and complete the entire production process.

[0082] Advantages of this utility model:

[0083] By using the sloping structure of the split-type middle mold, the downward molding pressure is converted into forward and backward thrust, which achieves precise pressure on the heel counter of the sole, ensuring that the shoe material blank fully fills the cavity, avoiding molding defects such as missing material and voids, and improving the molding quality and dimensional accuracy of the sole.

[0084] The middle mold adopts a detachable design, which can flexibly switch between two usage modes. It can complete the separate molding of the upper and lower soles, and also complete the fixed bonding of the upper and lower soles. There is no need to equip it with a special bonding mold, which reduces the production equipment cost and improves production efficiency.

[0085] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A split-type shoe sole forming mold, comprising an upper mold and a lower mold, wherein a cavity is provided on the upper side of the lower mold, characterized in that: A middle mold is provided between the upper mold and the lower mold. A punch that can extend into the cavity is provided on the lower side of the middle mold. The punch and the inner wall of the cavity are spaced apart. The middle mold consists of two parts: the front mold and the rear mold. The contact surface between the front mold and the rear mold is an inclined surface. When the front mold is subjected to downward pressure, the front mold can apply a backward thrust to the rear mold through the inclined surface.

2. The split-type shoe sole forming mold according to claim 1, characterized in that: The upper side of the middle mold is provided with a cavity two, and the lower side of the upper mold is provided with a punch two that can extend into the cavity two. The inner walls of the punch two and the cavity two are spaced apart.

3. The split-type shoe sole forming mold according to claim 2, characterized in that: The lower mold and the upper mold are hinged at the rear, and the middle mold is detachable.

4. The split-type shoe sole forming mold according to claim 3, characterized in that: The lower mold has a hinge part on its rear side, and the hinge part has a hinge hole. The upper mold has hinge plates on the left and right sides of its rear end, and the hinge plates have connecting grooves corresponding to the hinge holes, and also include hinge shafts that pass through the hinge holes and connecting grooves. The upper mold can be fastened to the middle mold and the lower mold. When switching between the upper mold and the middle mold fastening state and the upper mold and the lower mold fastening state, the hinge shaft moves in the connecting groove.

5. A split-type shoe sole forming mold according to claim 4, characterized in that: The lower mold has a positioning post on its upper side, and the middle mold and the upper mold have positioning holes corresponding to the positioning post.

6. The split-type shoe sole forming mold according to claim 1, characterized in that: The front mold is provided with handles on both the left and right sides.

7. The split-type shoe sole forming mold according to claim 1, characterized in that: The rear mold is provided with handles on both the left and right sides.

8. A split-type shoe sole forming mold according to claim 1, characterized in that: The upper and lower molds are each provided with a handle on the front side.

9. A split-type shoe sole forming mold according to claim 1, characterized in that: The lower side of the middle mold can form a sealing fit with the upper side of the lower mold.

10. A split-type shoe sole forming mold according to claim 4, characterized in that: The lower side of the upper mold can form a sealing fit with the upper side of the middle mold, and the lower side of the upper mold can form a sealing fit with the upper side of the lower mold.

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