Production line for sole vacuum forming

Abstract

The production line comprises a plurality of forming devices arranged at intervals, forming molds are arranged on the forming devices, and a movable base extending in the arrangement direction of the forming devices is arranged on one side of each forming device. An injection molding device capable of moving along the movable base and injecting raw materials into the forming molds is arranged on the movable base, and each forming device is provided with a vacuum cover and a branch pipe, wherein the vacuum cover seals the forming molds after the raw materials are injected into the forming molds, and the branch pipe is communicated with the vacuum cover. And one side of the forming device is provided with a vacuumizer which is connected with the plurality of branch pipes through a main pipe and can extract air in each vacuum cover to form negative pressure so as to discharge bubbles in the raw materials. In the working process, the vacuumizer pumps out air in the vacuum covers, negative pressure is formed around the mold, bubbles in raw materials are rapidly discharged, formed products do not have bubbles, the yield of finished products is improved, the multiple forming stations are arranged in parallel, the injection positions are rapidly switched in cooperation with the movable injection molding device, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to a production line for sole vacuum forming.

Background Art

[0002] Currently, in the sole production industry, using molds to produce soles is a commonly used technology in this industry. When using a mold to produce a sole, the upper cover of the mold is opened, liquid raw material is injected into the interior of the mold, the upper cover of the mold is closed, and it is heated and cooled to form. Since the raw material is in a liquid state, air bubbles will be formed during the raw material processing and injection process, so that air bubbles remain in the formed sole, resulting in problems such as voids and insufficient structural strength in the product, affecting the product quality.

[0003] Therefore, the present invention is precisely produced based on the above deficiencies.

Summary of the Invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and provide a production line for sole vacuum forming that improves product quality and is efficient.

[0005] The present invention is achieved through the following technical solutions:

[0006] A production line for sole vacuum forming, characterized in that: it includes a plurality of spaced forming devices 1, a forming mold 11 is provided on the forming device 1, a moving base 2 extending along the arrangement direction of the forming device 1 is provided on one side of the forming device 1, an injection device 3 capable of moving along the moving base 2 and injecting raw material into each forming mold 11 is provided on the moving base 2, a vacuum hood 12 that encloses the forming mold 11 after the raw material is injected into the forming mold 11 and a branch pipe 6 communicated with the vacuum hood 12 are provided on each forming device 1, and a vacuum pump 5 that is connected to multiple branch pipes 6 through a main pipe 4 and can extract the air in each vacuum hood 12 to form a negative pressure to discharge the air bubbles in the raw material is provided on one side of the forming device 1.

[0007] The production line for sole vacuum forming as described above is characterized in that: the forming device 1 includes a body 13 with an open upper end and a flap 14 hinged at one end to the opening of the body 13. The forming die 11 includes an upper die 111 provided on the flap 14 and a lower die 112 that can be provided on the body 13. A first driving device 15 is provided on the body 13, which can drive the flap 14 to flip towards the opening of the body 13 so that the upper die 111 cooperates with the lower die 112 or drive the flap 14 to flip upwards. The upper end of the vacuum hood 12 is open and is provided in the body 13 so as to be movable relatively up and down. A second driving device 16 is provided in the body 13, which can drive the vacuum hood 12 to move upwards after the upper die 111 and the lower die 112 are closed, so that the upper end of the vacuum hood 12 abuts against the flap 14. When the vacuum hood 12 abuts against the flap 14, it cooperates with the flap 14 to form a sealed space 17 that surrounds the upper die 111 and the lower die 112 and is communicated with the branch pipe 6.

[0008] The production line for sole vacuum forming as described above is characterized in that: a third driving device 18 is provided in the body 13, which can drive the lower die 112 to move upwards to abut against the upper die 111 and close when the flap 14 flips above the lower die 112.

[0009] The production line for sole vacuum forming as described above is characterized in that: a positioning boss 131 for pressing and positioning the lower surface of the flap 14 is provided on the body 13 after the flap 14 flips in place towards the opening of the body 13, and a die locking device 19 that can lock the flap 14 after the flap 14 presses against the positioning boss 131.

[0010] The die locking device 19 as described above is characterized in that: it includes a locking block 191 hinged at one end to the positioning boss 131 and a cylinder 192 hinged at one end to the body 13. A cylinder rod 1921 with one end hinged to the locking block 191 is provided on the cylinder 192. A proximity switch 193 is provided on the body 13, which can control the cylinder 192 to drive the cylinder rod 1921 to drive the locking block 191 to rotate and lock the flap 14 on the positioning boss 131 when it senses that the flap 14 presses against the positioning boss 131.

[0011] The first driving device 15 as described above is characterized in that: it includes two first hydraulic cylinders 151 respectively provided on both sides of the body 13. One end of each first hydraulic cylinder 151 is hinged to the body 13, and the piston rods extending from the other ends of the two first hydraulic cylinders 151 are respectively hinged to both sides of the flap 14.

[0012] The production line for sole vacuum forming as described above is characterized in that: the second driving device 16 includes a plurality of second hydraulic cylinders 161 installed in the machine body 13, and one end of the piston rod of the second hydraulic cylinder 161 is fixed on the lower end surface of the vacuum hood 12.

[0013] The production line for sole vacuum forming as described above is characterized in that: a lower template 10 is provided below the lower mold 112, the third driving device 18 includes a plurality of third hydraulic cylinders 181 installed in the machine body 13, and one end of the piston rod of the third hydraulic cylinder 181 passes through the vacuum hood 12 and is fixed on the lower end surface of the lower template 10.

[0014] The production line for sole vacuum forming as described above is characterized in that: the injection molding device 3 includes a moving platform 31 that can move left and right along the moving base 2, a frame 32 provided on the moving platform 31 and capable of moving forward and backward relative to the moving platform 31 in a direction approaching or away from the molding device 1, a vertical sliding table 33 that can move up and down along the frame 32, a speed reduction motor set 34 provided on the vertical sliding table 33, a rotating arm 35 driven by the speed reduction motor set 34 to rotate, and a pouring head 36 provided on the rotating arm 35 and capable of moving to the upper part of the molding die 11 to pour raw materials.

[0015] The production line for sole vacuum forming as described above is characterized in that: a receiving bucket 7 capable of receiving the raw materials dripping from the pouring head 36 is provided on the moving platform 31 after the speed reduction motor set 34 drives the rotating arm 35 to drive the pouring head 36 to reset.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The vacuum pump of the present invention is connected to each vacuum hood through a main pipe and multiple branch pipes. When the injection molding device injects raw materials into the molding die and the molding die is closed, the vacuum pump can extract the air in each vacuum hood, forming a negative pressure around the die to quickly discharge the bubbles in the raw materials. In this way, there will be no bubbles in the molded product, improving the yield rate of the sole finished product. Moreover, multiple molding stations are arranged in parallel, and together with the moving injection molding device, the injection position can be quickly switched, improving production efficiency and significantly shortening the production cycle.

[0018] 2. In the present invention, when the flap is flipped to above the lower mold, the third driving device can drive the lower mold to move upward to abut against the upper mold for closing. In this way, even if the thicknesses of different lower molds are different, the upper movement of the lower mold can ensure that different molds can be closed, making the molding device highly versatile and applicable to molds of different thicknesses.

[0019] 3. In the present invention, when the flap presses against the positioning boss, the cylinder of the mold locking device drives the locking block to rotate to lock the flap, preventing the mold from loosening or displacing during the injection molding process.

[0020] 4. When the injection head is reset, the receiving bucket receives the raw materials dripping from the injection head to avoid waste and pollution of the production line.

Brief Description of the Drawings

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the molding device of the present invention in the mold opening state;

[0023] Figure 3 It is a schematic structural diagram of the molding device of the present invention in a mold closing state;

[0024] Figure 4 It is a front view of the molding device of the present invention in the mold closing state;

[0025] Figure 5 yes Figure 4 Sectional view at AA in the middle;

[0026] Figure 6 It is a schematic structural diagram of the injection molding device of the present invention. [Specific implementation method]

[0027] The present invention will be further described below in conjunction with the accompanying drawings:

[0028] like Figures 1 to 6 As shown, a production line for vacuum forming of shoe soles comprises a plurality of forming devices 1 arranged at intervals, the forming devices 1 are provided with forming molds 11, one side of the forming devices 1 is provided with a movable base 2 extending along the arrangement direction of the forming devices 1, the movable base 2 is provided with an injection molding device 3 that can move along the movable base 2 and inject raw materials into each forming mold 11, each forming device 1 is provided with a vacuum cover 12 that seals the forming mold 11 after the raw materials are injected into the forming mold 11, and a branch pipe 6 connected to the vacuum cover 12, and one side of the forming device 1 is provided with a vacuum pump 5 that is connected to the plurality of branch pipes 6 through a main pipe 4 and can extract the air in each vacuum cover 12 to form a negative pressure to discharge the bubbles in the raw materials. Specifically, a control box 8 is also provided at the front side of the forming device 1, the control box 8 is provided with an electric control module inside and a button for controlling the operation of the forming device 1 on the surface, and a control valve 9 for controlling the air flow is provided at the connection between the branch pipe 6 and the main pipe 4, and when the forming device 1 is working, the corresponding control valve 9 will be opened, so that the vacuum pump 5 can vacuum the vacuum cover 12 on the corresponding forming device 1 when working.

[0029] The vacuum pump 5 of the present invention is connected to multiple branch pipes 6 through the main pipe 4 to each vacuum hood 12. When the injection molding device 3 injects raw materials into the molding die 11 and the molding die 11 is closed, the vacuum pump 5 can extract the air in each vacuum hood 12, forming a negative pressure around the die to quickly discharge the bubbles in the raw materials. In this way, there will be no bubbles in the molded product, improving the yield rate of the sole finished product. Moreover, multiple molding stations are arranged in parallel, cooperating with the moving injection molding device to quickly switch the feeding position, improving production efficiency and significantly shortening the production cycle.

[0030] As Figure 2 shown, the molding device 1 includes a body 13 with an open upper end and a flap 14 hinged at one end to the opening of the body 13. The molding die 11 includes an upper die 111 provided on the flap 14 and a lower die 112 that can be provided on the body 13. The body 13 is provided with a first driving device 15 that can drive the flap 14 to flip towards the opening of the body 13 so that the upper die 111 cooperates with the lower die 112 or drive the flap 14 to flip upwards. The vacuum hood 12 has an open upper end and is movably provided up and down relative to the body 13. The body 13 is provided with a second driving device 16 that can drive the vacuum hood 12 to move upwards after the upper die 111 and the lower die 112 are closed so that the upper end of the vacuum hood 12 abuts against the flap 14. When the vacuum hood 12 abuts against the flap 14, it cooperates with the flap 14 to form a sealed space 17 that surrounds the upper die 111 and the lower die 112 and is communicated with the branch pipe 6. Specifically, a sealing ring 20 is further provided at the open upper end of the vacuum hood 12. When the vacuum hood 12 abuts against the flap 14, the sealing ring 20 is pressed against the end face of the flap 14. In this way, the vacuum hood 12 covers the outside of the molding die 11 and cooperates with the flap 14 to form a sealed space 17 with good tightness, leaving only a communication hole communicated with the branch pipe 6. Moreover, the branch pipe 6 also has a telescopic elastic pipe section 61, which can be telescopically adapted when the vacuum hood 12 moves up and down, so that the branch pipe 6 is always communicated with the vacuum hood 12.

[0031] Specifically, the first driving device 15 includes two first hydraulic cylinders 151 respectively provided on both sides of the body 13. One end of the first hydraulic cylinder 151 is hinged to the body 13, and the piston rods extending from the other ends of the two first hydraulic cylinders 151 are respectively hinged to both sides of the flap 14. When the first hydraulic cylinder 151 drives the flap 14 to flip downwards, the upper die 111 on the flap 14 is closed with the lower die 112 in the body 13; conversely, when the first hydraulic cylinder 151 drives the flap 14 to flip upwards, the opening of the upper die 111 and the lower die 112 is realized.

[0032] Specifically, the second driving device 16 includes a plurality of second hydraulic cylinders 161 installed in the machine body 13, and one end of the piston rod of the second hydraulic cylinder 161 is fixed on the lower end surface of the vacuum hood 12. In a specific implementation, four second hydraulic cylinders 161 can be provided, which are evenly installed in the cavity of the machine body 13 around the central axis of the machine body 13, and one end of the piston rod on each second hydraulic cylinder 161 is fixedly connected to the four corners of the bottom of the vacuum hood 12 respectively.

[0033] Specifically, a lower template 10 is provided below the lower die 112. The third driving device 18 includes a plurality of third hydraulic cylinders 181 installed in the machine body 13, and one end of the piston rod of the third hydraulic cylinder 181 passes through the vacuum hood 12 and is fixed on the lower end surface of the lower template 10. In a specific implementation, one third hydraulic cylinder 181 is provided, which is installed in the middle of the cavity of the machine body 13, and one end of its piston rod passes through the middle of the vacuum hood 12 and is fixedly connected to the lower template 10. Of course, its piston rod and the vacuum hood 12 adopt sliding sealing.

[0034] Since different lower dies may have different thicknesses, to ensure that the molding device can be applicable to molds with different thicknesses, the present invention is provided with a third driving device 18 in the machine body 13 that can drive the lower die 112 to move upward and abut against the upper die 111 for mold closing when the turning plate 14 turns to above the lower die 112. In this way, even if different lower dies have different thicknesses, the lower die 112 can be moved upward to ensure that different molds can be closed, making the molding device highly versatile.

[0035] Furthermore, a positioning boss 131 for the lower surface of the turning plate 14 to press against and be positioned is provided on the machine body 13 after the turning plate 14 turns in place towards the opening of the machine body 13, and a mold locking device 19 that can lock the turning plate 14 after the turning plate 14 presses against the positioning boss 131. After the turning plate 14 presses against the positioning boss 131, the air cylinder of the mold locking device 19 drives the locking block 191 to rotate, automatically locking the turning plate 14 to prevent the mold from loosening or displacing during the injection molding process.

[0036] Specifically, the mold locking device 19 includes a locking block 191 hinged at one end to the positioning boss 131 and an air cylinder 192 hinged at one end to the machine body 13. An air cylinder rod 1921 hinged to the locking block 191 at one end is provided on the air cylinder 192, and a proximity switch 193 is provided on the machine body 13 to control the air cylinder 192 to drive the air cylinder rod 1921 to drive the locking block 191 to rotate and lock the turning plate 14 on the positioning boss 131 when it senses that the turning plate 14 presses against the positioning boss 131. After the proximity switch 193 detects that the turning plate 14 presses against the positioning boss 131, the air cylinder 192 drives the locking block 191 to rotate and lock the turning plate 14 to prevent displacement during the mold closing process.

[0037] The injection molding device 3 includes a moving platform 31 that can move left and right along a moving base 2, a frame 32 provided on the moving platform 31 and capable of moving back and forth relative to the moving platform 31 in a direction approaching or away from the molding device 1, a vertical slide 33 that can move up and down along the frame 32, a speed reduction motor set 34 provided on the vertical slide 33, a rotating arm 35 driven to rotate by the speed reduction motor set 34, and a pouring head 36 provided on the rotating arm 35 and capable of moving to the upper part of the molding die 11 to pour raw materials. Specifically, the speed reduction motor set 34 includes a motor and a reduction gearbox driven by the motor to drive the rotating arm 35 to rotate. The left and right movement of the moving platform 31, the front and back movement of the frame 32, and the up and down movement of the vertical slide 33 can all be driven by a motor screw group. The motor screw group includes a motor, a screw driven to rotate by the motor, and a screw seat sleeved on the screw. Each screw is rotatably installed on the moving base 2, the moving platform 31, and the frame 32 respectively, and each screw seat is fixed on the moving platform 31, the frame 32, and the vertical slide 33 respectively. The working principle is the same as that of the existing motor screw-driven slide.

[0038] In a specific implementation, after the feeding is completed, the speed reduction motor set 34 drives the rotating arm 35 to reset to be parallel to the moving base 2. To avoid interfering with the mold opening of the molding device 1, a receiving bucket 7 is provided on the moving platform 31 to receive the raw materials dripping from the pouring head 36 after the speed reduction motor set 34 drives the rotating arm 35 to drive the pouring head 36 to reset. When the pouring head is reset, the receiving bucket receives the raw materials dripping from the pouring head, avoiding waste and pollution of the production line.

[0039] Working process: The moving platform 31 of the injection molding device 3 moves along the moving base 2, the frame 32 can move back and forth to adjust the position, and the vertical slide 33 drives the pouring head 36 to move up and down to a suitable height. The speed reduction motor set 34 drives the rotating arm 35 to rotate, so that the pouring head 36 is accurately positioned above the molding die 11 to complete the injection of raw materials; then when the speed reduction motor set 34 drives the rotating arm 35 to rotate and reset, the receiving bucket 7 receives the raw materials dripping from the pouring head 36, avoiding waste and pollution; after the injection molding device 3 completes the injection of raw materials, the first hydraulic cylinder 151 drives the flap 14 to turn downward to above the lower mold, and then the third hydraulic cylinder 181 drives the lower template 10 to drive the lower mold 112 to move upward so that the upper mold 111 and the lower mold 112 are closed; after closing the mold, the second hydraulic cylinder 161 drives the vacuum hood 12 to move upward so that its upper end abuts against the flap 14 to form a sealed space 17 surrounding the upper mold 111 and the lower mold 112. Finally, the vacuum pump 5 evacuates the sealed space 17 in each vacuum hood 12 through the main pipe 4 and the branch pipe 6 to form a negative pressure environment. Under the action of the negative pressure, the bubbles in the raw materials are quickly discharged, ensuring that there are no bubble residues in the molded sole and improving the product quality.

[0040] The production line for sole vacuum forming of the present invention effectively solves the problem of bubble residue in sole forming and greatly improves production efficiency and enhances product competitiveness through the cooperation of an automated mold opening and closing mechanism, a vacuum exhaust structure, and an efficient injection molding system.

Claims

1. A production line for vacuum forming of shoe soles, characterized in that: The invention comprises a plurality of molding devices (1) arranged at intervals, wherein the molding devices (1) are provided with molding molds (11), one side of the molding devices (1) is provided with a movable base (2) extending along the arrangement direction of the molding devices (1), the movable base (2) is provided with an injection molding device (3) capable of moving along the movable base (2) and injecting raw materials into each molding mold (11), each of the molding devices (1) is provided with a vacuum cover (12) for sealing the molding mold (11) after the raw materials are injected into the molding mold (11) and a branch pipe (6) connected to the vacuum cover (12), and one side of the molding device (1) is provided with a vacuum pump (5) which is connected to the plurality of branch pipes (6) through a main pipe (4) and can extract the air in each vacuum cover (12) to form a negative pressure so that bubbles in the raw materials are discharged.

2. The production line for vacuum forming of shoe soles according to claim 1, characterized in that: The molding device (1) comprises a machine body (13) with an opening at the upper end and a flap (14) hinged at one end to the opening of the machine body (13); the molding die (11) comprises an upper die (111) arranged on the flap (14) and a lower die (112) which can be arranged on the machine body (13); the machine body (13) is provided with a first driving device (15) which can drive the flap (14) to flip toward the opening of the machine body (13) so that the upper die (111) cooperates with the lower die (112) or drives the flap (14) to flip upward; The upper end of the vacuum hood (12) is open and is relatively movable upward and downward within the machine body (13). The machine body (13) is provided with a second driving device (16) which can drive the vacuum hood (12) to move upward when the upper mold (111) and the lower mold (112) are molded together so that the upper end of the vacuum hood (12) abuts against the flap (14). When the vacuum hood (12) abuts against the flap (14), it cooperates with the flap (14) to form a sealed space (17) surrounding the upper mold (111) and the lower mold (112) and communicating with the branch pipe (6).

3. The production line for vacuum forming of soles according to claim 2, characterized in that: The machine body (13) is provided with a third driving device (18) which can drive the lower mold (112) to move upwards and abut against the upper mold (111) when the flap (14) is turned over to the top of the lower mold (112).

4. The production line for vacuum forming of shoe soles according to claim 2, characterized in that: The machine body (13) is provided with a positioning boss (131) for the lower surface of the flap (14) to be pressed against and positioned when the flap (14) is turned over to the opening of the machine body (13) and a locking device (19) that can lock the flap (14) when the flap (14) is pressed against the positioning boss (131).

5. The production line for vacuum forming of shoe soles according to claim 4, characterized in that: The mold locking device (19) comprises a locking block (191) with one end hinged on the positioning boss (131) and a cylinder (192) with one end hinged on the machine body (13); the cylinder (192) is provided with a cylinder rod (1921) with one end hinged to the locking block (191); the machine body (13) is provided with a proximity switch (193) for sensing that the flap (14) is pressed against the positioning boss (131) and controlling the cylinder (192) to drive the cylinder rod (1921) to drive the locking block (191) to rotate and lock the flap (14) on the positioning boss (131).

6. The production line for vacuum forming of shoe soles according to claim 2, characterized in that: The first driving device (15) comprises two first hydraulic cylinders (151) respectively arranged on both sides of the machine body (13), one end of the first hydraulic cylinder (151) is hinged on the machine body (13), and piston rods extending from the other ends of the two first hydraulic cylinders (151) are respectively hinged on both sides of the flap (14).

7. The production line for vacuum forming of shoe soles according to claim 2, characterized in that: The second driving device (16) comprises a plurality of second hydraulic cylinders (161) installed in the machine body (13), and one end of the piston rod of the second hydraulic cylinder (161) is fixed on the lower end surface of the vacuum cover (12).

8. The production line for vacuum forming of shoe soles according to claim 3, characterized in that: A lower mold plate (10) is provided below the lower mold (112); the third driving device (18) comprises a plurality of third hydraulic cylinders (181) installed in the machine body (13); one end of the piston rod of the third hydraulic cylinder (181) passes through the vacuum cover (12) and is fixed to the lower end surface of the lower mold plate (10).

9. The production line for vacuum forming of shoe soles according to claim 1, characterized in that: The injection molding device (3) comprises a movable platform (31) capable of moving left and right along a movable base (2), a frame (32) disposed on the movable platform (31) and capable of moving forward and backward relative to the movable platform (31) in a direction close to or away from a molding device (1), a vertical slide (33) capable of moving up and down along the frame (32), a reduction motor group (34) disposed on the vertical slide (33), a rotating arm (35) driven to rotate by the reduction motor group (34), and an injection head (36) disposed on the rotating arm (35) and capable of moving with the rotating arm (35) to the top of the molding mold (11) to inject raw materials.

10. The production line for vacuum forming of shoe soles according to claim 9, characterized in that: The mobile platform (31) is provided with a material receiving bucket (7) which can receive the raw materials dripping from the injection head (36) after the reduction motor group (34) drives the rotating arm (35) to drive the injection head (36) to reset.

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