Composite sole production process

Abstract

The invention relates to the field of shoe production and processing, in particular to a composite shoe sole production technology which comprises the steps of mold closing, first material blanking, first material heating, second material blanking, second material heating and shoe sole molding.According to the composite shoe sole production technology, the height of an upper mold can be controlled, the size of the volume in a containing cavity can be controlled, and the first material and the second material are respectively blanked and foamed; the first material and the second material can form the first part and the second part which are well bounded, the first material is not completely foamed when the second material is added, and the joints of the first material and the second material can be fused together, so that the integrally-formed sole is formed, the adhesion degree is high, and glue fixation is not needed; the shoe sole is not prone to cracking even if the shoe sole is worn for a long time or subjected to large acting force, the quality of the shoe sole is improved, meanwhile, the procedures of manual carrying and gluing are omitted, the production efficiency is greatly improved, the production cost is reduced, and the technical problems that the composite shoe sole production technology is tedious, the production efficiency is low and the production quality is poor are solved.

Description

Technical Field

[0001] The invention relates to the field of shoe production and processing, and in particular to a composite sole production process. Background Art

[0002] The composite sole is made of double, three or more layers of sole materials. The double-layer sole includes an outsole and a midsole. The outsole is the part that directly contacts the ground, and its main function is to prevent slipping and wear. The main function of the midsole is to cushion and reduce shock. The quality of the midsole directly determines the cushioning and rebound performance of the sole, thereby affecting the comfort and protection of walking or running. When manufacturing composite soles, the outsole and the midsole are usually foamed and formed in two molds respectively, and then the outsole and the midsole are glued together. This method requires manual collection of the produced outsole and midsole, and then transported to the next process, which consumes a lot of manpower and time. In addition, the outsole and the midsole bonded by glue may crack when worn for a long time or subjected to a large force. During the glue spraying process, there may be too much glue, too little glue, local glue leakage, etc., which affects the quality of the sole.

[0003] If the two materials are put into the mold from top to bottom, it is impossible to determine which material expands first because the granular material expands and flows during the foaming process. The expanded material will squeeze and push other materials to move. The position of the granular material changes during the foaming process, and its position is difficult to control. The two materials of the produced sole will be mixed together irregularly, and it is difficult to form a sole with clear boundaries between the upper and lower layers. The function of the composite sole cannot be achieved, and the distribution of the two materials of the sole produced each time is different, and the functionality is greatly different. Therefore, using the existing production equipment and production process, the two materials cannot be foamed and molded in the same mold at the same time. Summary of the invention

[0004] Therefore, in view of the above problems, the present invention proposes a composite sole production process, which solves the technical problems of complicated composite sole production process, low production efficiency and poor production quality.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A composite sole production process comprises the following steps: S1.Mold closing: The driving device of the production device drives the upper mold and the lower mold to close the mold, and a closed mold cavity is formed between the upper mold and the lower mold. A lifting block corresponding to the mold cavity is provided at the bottom of the upper mold, and the lifting block moves into the upper mold; The production device includes a frame, a fixed seat fixed on the frame, an upper mold arranged on the fixed seat, a lifting seat liftably arranged on the frame, a driving device for driving the lifting seat to lift and lower, a pressure sensor arranged on the lifting seat, a lower mold connected to the pressure sensor, a first unloading device and a second unloading device arranged on the frame, a mold cavity is formed between the upper mold and the lower mold, a unloading valve is provided on the upper mold, the first unloading device and the second unloading device are connected to the unloading valve, the first unloading device is provided with a first material, the second unloading device is provided with a second material, a first wire groove is provided at the bottom of the lower mold, a first heating wire is provided in the first wire groove, a second wire groove is provided on the outer side wall of the lower mold, a second heating wire is provided in the second wire groove, a third wire groove is provided on the top of the upper mold, and a third heating wire is provided in the third wire groove; S2. First material unloading: The first material discharge device discharges the first material into the mold cavity; S3. First material heating: The first heating wire is heated, and when it is heated to T1, the temperature is maintained; at the same time, part of the second heating wire is heated, and the heated second heating wire is located at the lower part and corresponds to the mold cavity, and when it is heated to T2, the temperature is maintained; the third heating wire is heated, and when it is heated to T3, the temperature is maintained; the first material foams and expands at high temperature, and the first material fills the mold cavity to form the first part of the sole; S4. Unloading of the second material: The driving device drives the lower mold to descend, so that the volume of the mold cavity becomes larger, and the second unloading device unloads the second material into the mold cavity; S5. Heating of the second material: Part of the second heating wire is powered on for heating, the heated second heating wire corresponds to the mold cavity, the third heating wire continues to maintain the temperature of T3, the first heating wire increases the heating temperature to T4, the second heating wire increases the heating temperature to T5, the second material begins to foam and expand, the first material continues to foam, and the materials in the mold cavity are foamed and bonded together; S6.Sole molding: After the material is completely foamed, the sole is formed in the mold cavity, the first material forms a first part on the sole, and the second material forms a second part on the sole. The driving device drives the lower mold to descend and take out the sole.

[0006] Further: After the heating of the second material in step S5 is completed, the third material is fed and heated. The driving device drives the lower mold to descend, so that the volume of the mold cavity becomes larger. The third feeding device feeds the third material into the mold cavity, and part of the second heating wire is energized for heating. The heated second heating wire corresponds to the mold cavity. The third heating wire continues to maintain the T3 temperature. The first heating wire and the second heating wire maintain or increase the heating temperature. The third material begins to foam and expand, and the second material and the third material are bonded together, and the third material forms a third part.

[0007] Step S3, T3>T1, T3>T2, the foaming degree of the top of the first part is greater than the foaming degrees of the bottom and the side walls. After the second material is fed to the top of the first part, the second material expands. The top of the first part is located inside the sole. The heating temperature of the top of the first part is reduced, which reduces the heating effect of the top of the first part. However, the first high-temperature heating of the top of the first part can make up for the second heating. When the sole is formed, the foaming degrees inside and outside the sole can be synchronized.

[0008] There are at least two second wire grooves and second heating wires, and each of the second heating wires is horizontally wrapped around the side wall of the lower mold or spirally wrapped around the side wall of the lower mold. When the first material is heated, the second heating wire at the bottom is powered on for heating. When the second material is heated, one more second heating wire is started for heating, and the second heating wire corresponds to the part with increased volume of the mold cavity.

[0009] The T1 temperature is 100 degrees Celsius to 120 degrees Celsius, the T2 temperature is 100 degrees Celsius to 120 degrees Celsius, and the T3 temperature is 150 degrees Celsius to 170 degrees Celsius.

[0010] The first material is PVC or PU, and the second material is EVA resin.

[0011] A high-temperature sealing ring is arranged on the side wall of the lifting block.

[0012] The outer walls of the first wire trough, the second wire trough and the third wire trough are all provided with a sealing layer.

[0013] The first heating wire, the second heating wire and the third heating wire are connected to thermocouples respectively. During the heating process, the thermocouples can detect the temperature and feed it back to the system, thereby controlling the temperature more accurately.

[0014] The thermocouple is arranged in the wire slot.

[0015] By adopting the above technical solution, the beneficial effects of the present invention are: The present invention can control the height of the upper mold, thereby controlling the size of the volume in the cavity, and the first material and the second material are respectively fed and foamed. During the foaming process, the volume of the first material expands to form a first part; when the second material is foamed, although the first material of the first part is not completely foamed, the first part continues to foam and expand without causing a greater change in its position, so that the second material will be fixed on the top of the first material after foaming, and the first material and the second material can form a first part and a second part with stable and clear boundaries. At the same time, because the first material is not completely foamed when the second material is added, the connection between the first material and the second material can be fused together to form an integrally formed sole, which has high adhesion and does not need to be fixed with glue. The sole is not easy to crack even if it is worn for a long time or subjected to a large force, thereby improving the sole The quality of the shoe is improved, and at the same time, the manual handling and gluing processes are saved, the production efficiency is greatly improved, and the production cost is reduced; the second heating wire adopts segmented heating, which can greatly save electric energy and reduce production cost; further, the temperature is controlled by the first heating wire, the second heating wire and the third heating wire respectively, so that the foaming time of the material heated first and the material heated later can be compensated, and the situation that the material discharged first and the material discharged later are overheated and insufficiently heated is avoided, so that the materials discharged at different times can be formed synchronously, thereby improving the quality of the sole; although the temperature of the second heating wire that is started later is relatively low, the temperature of the third heating wire is large, which can shorten the heating time of the newly added material; further, the present invention can also adopt the same method to foam the third material or more materials to manufacture a multi-layer composite sole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the production device of the present invention.

[0017] Figure 2 It is a schematic diagram of the structure of the production device when the first material is heated.

[0018] Figure 3 It is a schematic diagram of the structure of the production device when the second material is heated.

[0019] Figure 4 It is a schematic diagram of the structure of the upper mold and the lower mold.

[0020] Figure 5 It is the main view of the upper mold and the lower mold.

[0021] Figure 6 This is a bottom view of the lower mold.

[0022] Figure 7 It is a partial cross-sectional view of the first wire trough, the second wire trough and the third wire trough.

[0023] Figure 8 It is a partial cross-sectional view of a thermocouple.

[0024] Fig. 9 It is a schematic diagram of the structure of the sole.

[0025] Fig.10 It is a structural schematic diagram of a production device provided with a third material.

[0026] Fig.11 yes Fig.10 The front view of the upper and lower molds.

[0027] Fig.12 It is a schematic diagram of a structure having a third part on the sole.

[0028] Fig.13 It is a schematic diagram of a structure having a fourth part on the sole.

[0029] Reference numerals: 1. Upper mold; 11. Unloading valve; 12. Third wire groove; 13. Third heating wire; 14. Lifting block; 2. Lower mold; 21. First wire groove; 22. First heating wire; 23. Second wire groove; 24. Second heating wire; 31. Frame; 32. Fixed seat; 33. Lifting seat; 34. Driving device; 35. Pressure sensor; 36. First unloading device; 37. Second unloading device; 38. Third unloading device; 41. Mold cavity; 42. Sealing layer; 43. Thermocouple; 5. Sole; 51. First part; 52. Second part; 53. Third part; 54. Fourth part. DETAILED DESCRIPTION

[0030] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0031] refer to Figures 1 to 9 This embodiment provides a composite sole production process, comprising the following steps: S1.Mold closing: The driving device 34 of the production device of the shoe sole 5 drives the upper mold 1 and the lower mold 2 to close the mold, and a closed mold cavity 41 is formed between the upper mold 1 and the lower mold 2. Figure 2 A lifting block 14 corresponding to the mold cavity 41 is provided at the bottom of the upper mold 1 , and the lifting block 14 moves into the upper mold 1 .

[0032] The production device includes a frame 31, a fixed seat 32 fixed on the frame 31, an upper mold 1 arranged on the fixed seat 32, a lifting seat 33 liftably arranged on the frame 31, a driving device 34 for driving the lifting seat 33 to move up and down, a pressure sensor 35 arranged on the lifting seat 33, a lower mold 2 connected to the pressure sensor 35, a first blanking device 36 and a second blanking device 37 arranged on the frame 31, a mold cavity 41 is formed between the upper mold 1 and the lower mold 2, a blanking valve 11 is provided on the upper mold 1, the first blanking device 36 and the second blanking device 37 are connected to the blanking valve 11, the first blanking device 36 is provided with a first material, and the second blanking device 37 is provided with a second material, a first wire groove 21 is provided at the bottom of the lower mold 2, a first heating wire 22 is provided in the first wire groove 21, a second wire groove 23 is provided on the outer wall of the lower mold 2, a plurality of second heating wires 24 are provided in the second wire groove 23, a third wire groove 12 is provided at the top of the upper mold 1, and a third heating wire 13 is provided in the third wire groove 12.

[0033] S2. First material unloading: The first material discharge device 36 discharges the first material into the mold cavity 41 .

[0034] S3. First material heating: The first heating wire 22 is heated, and when it is heated to T1, the temperature is maintained; the lower second heating wire 24 is heated, and the heated second heating wire 24 corresponds to the mold cavity 41, and when it is heated to T2, the temperature is maintained; the third heating wire 13 is heated, and when it is heated to T3, the heating temperature is maintained; the first material foams and expands, and the first material fills the mold cavity 41 to form the first part 51 of the sole 5.

[0035] T3>T1, T3>T2, T1 temperature is 100 degrees Celsius to 120 degrees Celsius, T2 temperature is 100 degrees Celsius to 120 degrees Celsius, T3 temperature is 150 degrees Celsius to 170 degrees Celsius; the foaming degree of the top of the first part 51 is greater than the foaming degree of the bottom and the side wall. After the second material is fed to the top of the first part 51, the second material expands, and the top of the first part 51 is located inside the sole 5. The heating temperature of the top of the first part 51 is reduced, which reduces the heating effect of the top of the first part 51. However, the first high-temperature heating of the top of the first part 51 can make up for the second heating. When the sole 5 is formed, the foaming degree inside and outside the sole 5 can be synchronized.

[0036] S4. Unloading of the second material: The driving device 34 drives the lower mold 2 to descend, so that the volume of the mold cavity 41 becomes larger. Figure 3 The second feeding device 37 feeds the second material into the mold cavity 41 .

[0037] S5. Heating of the second material: Part of the second heating wire 24 is powered on for heating, and the heated second heating wire 24 corresponds to the mold cavity 41. The third heating wire 13 continues to maintain the temperature of T3. The first heating wire 22 increases the heating temperature to T4. The second heating wire 24 increases the heating temperature to T5. The second material begins to foam and expand, and the first material continues to foam. The materials in the mold cavity 41 foam and bond together.

[0038] S6.Sole 5 molding: After the material is fully foamed, the sole 5 is formed in the mold cavity 41, the first material forms a first part 51 on the sole 5, and the second material forms a second part 52 on the sole 5, and the driving device 34 drives the lower mold 2 to descend. Figure 1 , take out the sole 5.

[0039] In one embodiment, Figure 4 There are two second wire grooves 23 and two second heating wires 24, each second heating wire 24 is horizontally wrapped around the side wall of the lower mold 2 or spirally wrapped around the side wall of the lower mold 2. When the first material is heated, the second heating wire 24 at the bottom is energized for heating. When the second material is heated, one more second heating wire 24 is started for heating, and the second heating wire 24 corresponds to the enlarged part of the mold cavity 41.

[0040] The number of the second heating wires 24 can be one, two, three or even more, depending on the specific situation.

[0041] The first heating wire 22, the second heating wire 24, and the third heating wire 13 are usually evenly distributed, and other distribution methods can also be used, which are specifically set according to the situation.

[0042] In one embodiment, a high temperature sealing ring is provided on the side wall of the lifting block 14 to seal. In another embodiment, the high temperature sealing ring may not be provided, because the gap between the lifting block 14 and the inner wall of the lower mold 2 is small, and the granular material expands in volume after foaming and expands, and adheres to each other and cannot pass through the gap.

[0043] In one embodiment, the outer walls of the first wire groove 21, the second wire groove 23 and the third wire groove 12 are all provided with a sealing layer 42, and the first heating wire 22, the second heating wire 24 and the third heating wire 13 are respectively connected to a thermocouple 43. During the heating process, the thermocouple 43 can detect the temperature and feed it back to the system, thereby controlling the temperature more accurately. The thermocouple 43 is arranged in the wire groove.

[0044] The first material is PVC, PU or other materials, the second material is EVA resin or other materials, and the first material and the second material are different materials, which are set according to specific circumstances.

[0045] The driving device 34 may be an oil cylinder, an air cylinder or other linear motion devices, which are well-known devices and will not be described in detail herein.

[0046] The above-mentioned T1 temperature can be 110 degrees Celsius, 125 degrees Celsius, 95 degrees Celsius or other temperatures; the above-mentioned T2 temperature can be 110 degrees Celsius, 125 degrees Celsius, 95 degrees Celsius or other temperatures; the temperatures of the above-mentioned T1 and T2 are usually set to the same, or can be set to different, depending on the specific situation.

[0047] The above-mentioned T4 temperature is usually set to 125 degrees Celsius to 140 degrees Celsius, and can be 130 degrees Celsius, 135 degrees Celsius or other temperatures; the above-mentioned T5 temperature is usually set to 125 degrees Celsius to 140 degrees Celsius, and can be 130 degrees Celsius, 135 degrees Celsius or other temperatures; the temperatures of the above-mentioned T4 and T5 are usually set to the same, or can be set to different, depending on the specific situation.

[0048] The above T3 temperature is 150 degrees Celsius to 170 degrees Celsius, and can be set to 155 degrees Celsius, 160 degrees Celsius, 165 degrees Celsius, etc., depending on the specific situation.

[0049] The temperatures of T1, T2 and T3 are related to the material, quantity, thickness of each layer of the sole 5, etc.; the temperatures of T4 and T5 are not only related to the material, quantity, thickness of each layer of the sole 5, but also to the number of composite layers of the sole 5, and are set according to specific circumstances.

[0050] refer to Figures 10 to 12 In one embodiment, the third material is fed and heated, the driving device 34 drives the lower mold 2 to descend, so that the volume of the mold cavity 41 becomes larger, the third feeding device 38 feeds the third material into the mold cavity 41, part of the second heating wire 24 is powered on for heating, the heated second heating wire 24 corresponds to the mold cavity 41, the third heating wire 13 continues to maintain the temperature T3, the first heating wire 22 and the second heating wire 24 maintain or increase the heating temperature, the third material begins to foam and expand, the second material and the third material are bonded together, and the third material forms a third part 53.

[0051] The present invention can also add the following steps: refer to Fig.13After the first material is unloaded in step S3, the mixed material is unloaded and heated. The driving device 34 drives the lower mold 2 to descend, so that the volume of the cavity 41 becomes larger. The first unloading device 36 and the second unloading device 37 unload the first material and the second material into the cavity 41. Part of the second heating wire 24 is powered on for heating, and the heated second heating wire 24 corresponds to the cavity 41. The third heating wire 13 continues to maintain the temperature T3, the first heating wire 22 maintains the heating temperature or increases the heating temperature, the second heating wire 24 maintains the heating temperature or increases the heating temperature, and the mixture of the first material and the second material is heated and foamed to form the fourth part 54.

[0052] In this structure, the fourth part 54 between the first part 51 and the second part 52 plays a transition role, transferring the function of the first part 51 to the function of the second part 52, thereby improving the quality of the sole 5.

[0053] In one embodiment, during the mixing and feeding of the first material and the second material, the first material is fed to more than one third of the material before the second material is fed. After the first material is fed, the second material continues to be fed, so that the first material accounts for a larger proportion in the lower half of the fourth part 54 and the second material accounts for a larger proportion in the upper half of the fourth part 54. In another embodiment, the feeding amount of the first material gradually decreases and the feeding amount of the second material gradually increases. This structure has a better effect of transitioning the function of the first part 51 to the function of the second part 52.

[0054] The present invention can also be provided with a fourth material or more materials to form a sole 5 with more layers, and can produce a sole 5 with a larger thickness such as height-increasing shoes and basketball shoes.

[0055] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A composite sole production process, characterized in that: The following steps are involved: S1.Mold closing: The driving device of the production device drives the upper mold and the lower mold to close the mold, and a closed mold cavity is formed between the upper mold and the lower mold. A lifting block corresponding to the mold cavity is provided at the bottom of the upper mold, and the lifting block moves into the upper mold; The production device includes a frame, a fixed seat fixed on the frame, an upper mold arranged on the fixed seat, a lifting seat liftably arranged on the frame, a driving device for driving the lifting seat to lift and lower, a pressure sensor arranged on the lifting seat, a lower mold connected to the pressure sensor, a first unloading device and a second unloading device arranged on the frame, a mold cavity is formed between the upper mold and the lower mold, a unloading valve is provided on the upper mold, the first unloading device and the second unloading device are connected to the unloading valve, the first unloading device is provided with a first material, the second unloading device is provided with a second material, a first wire groove is provided at the bottom of the lower mold, a first heating wire is provided in the first wire groove, a second wire groove is provided on the outer side wall of the lower mold, a second heating wire is provided in the second wire groove, a third wire groove is provided on the top of the upper mold, and a third heating wire is provided in the third wire groove; S2. First material blanking: The first material discharge device discharges the first material into the mold cavity; S3. First material heating: The first heating wire is heated, and when it is heated to T1, the temperature is maintained; at the same time, part of the second heating wire is heated, and the heated second heating wire is located at the lower part and corresponds to the mold cavity, and when it is heated to T2, the temperature is maintained; the third heating wire is heated, and when it is heated to T3, the temperature is maintained; the first material foams and expands at high temperature, and the first material fills the mold cavity to form the first part of the sole; S4. Unloading of the second material: The driving device drives the lower mold to descend, so that the volume of the mold cavity becomes larger, and the second unloading device unloads the second material into the mold cavity; S5. Heating of the second material: Part of the second heating wire is powered on for heating, the heated second heating wire corresponds to the mold cavity, the third heating wire continues to maintain the temperature of T3, the first heating wire increases the heating temperature to T4, the second heating wire increases the heating temperature to T5, the second material begins to foam and expand, the first material continues to foam, and the materials in the mold cavity are foamed and bonded together; S6.Sole molding: After the material is completely foamed, the sole is formed in the mold cavity, the first material forms a first part on the sole, and the second material forms a second part on the sole. The driving device drives the lower mold to descend and take out the sole.

2. A composite sole production process according to claim 1, characterized in that: After the heating of the second material in step S5 is completed, the third material is fed and heated. The driving device drives the lower mold to descend, so that the volume of the mold cavity becomes larger. The third feeding device feeds the third material into the mold cavity, and part of the second heating wire is energized for heating. The heated second heating wire corresponds to the mold cavity. The third heating wire continues to maintain the T3 temperature. The first heating wire and the second heating wire maintain or increase the heating temperature. The third material begins to foam and expand, and the second material and the third material are bonded together, and the third material forms a third part.

3. A composite sole production process according to claim 1, characterized in that: Step S3, T3>T1, T3>T2, the foaming degree of the top of the first part is greater than the foaming degrees of the bottom and the side walls. After the second material is fed to the top of the first part, the second material expands. The top of the first part is located inside the sole. The heating temperature of the top of the first part is reduced, which reduces the heating effect of the top of the first part. However, the first high-temperature heating of the top of the first part can make up for the second heating. When the sole is formed, the foaming degrees inside and outside the sole can be synchronized.

4. The composite sole production process according to claim 1, characterized in that: There are at least two second wire grooves and second heating wires, and each of the second heating wires is horizontally wrapped around the side wall of the lower mold or spirally wrapped around the side wall of the lower mold. When the first material is heated, the second heating wire at the bottom is powered on for heating. When the second material is heated, one more second heating wire is started for heating, and the second heating wire corresponds to the part with increased volume of the mold cavity.

5. The composite sole production process according to claim 1, characterized in that: The T1 temperature is 100 degrees Celsius to 120 degrees Celsius, the T2 temperature is 100 degrees Celsius to 120 degrees Celsius, and the T3 temperature is 150 degrees Celsius to 170 degrees Celsius.

6. The composite sole production process according to claim 1, characterized in that: The first material is PVC or PU, and the second material is EVA resin.

7. A composite sole production process according to claim 1, characterized in that: A high-temperature sealing ring is arranged on the side wall of the lifting block.

8. The composite sole production process according to claim 1, characterized in that: The outer walls of the first wire trough, the second wire trough and the third wire trough are all provided with a sealing layer.

9. A composite sole production process according to claim 1, characterized in that: The first heating wire, the second heating wire and the third heating wire are connected to thermocouples respectively. During the heating process, the thermocouples can detect the temperature and feed it back to the system, thereby controlling the temperature more accurately.

10. A composite sole production process according to claim 9, characterized in that: The thermocouple is arranged in the wire slot.

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