Shoe injection molding equipment and injection molding method

Abstract

The present invention proposes a shoe injection molding device and injection molding method with simple structure, low production cost, improved shoe injection molding efficiency and improved injection molding quality, wherein the shoe injection molding device includes a shoe last and a bottom mold, the upper end surface of the bottom mold is provided with an injection molding groove downward, the shoe last can slide up and down and be arranged above the injection molding groove, the lower end of the shoe last can be embedded in the injection molding groove, the shoe last is provided with an injection molding through hole, the feed inlet of the injection molding through hole is provided on the peripheral side of the shoe last, and the plurality of discharge ports of the injection molding through hole are provided on the bottom surface of the shoe last. The shoe injection molding method includes S1, setting the shoe body and the shoe last; S2, pre-molding the left mold and the right mold; S3, lowering the shoe last; S4, molding the left mold and the right mold; S5, the stabilizing block and the injection molding head clamp the shoe last; S6, performing injection molding; S7, removing the finished shoe.

Description

Technical Field

[0001] The invention relates to the technical field of shoe production, in particular to shoe injection molding equipment and an injection molding method. Background Art

[0002] Common rubber shoes and plastic shoes on the market are usually produced by injection molding through shoe injection molding equipment. The shoe injection molding equipment includes a bottom mold and a shoe last, and an injection molding cavity is formed between the bottom mold and the shoe last. Existing shoe injection molding equipment usually opens an injection molding through hole on the bottom mold, and injects plastic into the injection molding cavity so that the shoe body and the sole are combined into one. This injection molding method requires manual cutting of the slug. If the outlet of the injection molding through hole is opened on the bottom surface of the bottom mold, the slug will destroy the overall anti-slip structure of the sole, resulting in a decrease in the anti-slip effect. If the outlet of the injection molding through hole is opened on the side of the bottom mold, it will destroy the integrity of the shoe design. Summary of the invention

[0003] Therefore, in view of the above problems, the present invention proposes a shoe injection molding device and an injection molding method which have a simple structure, low production cost, and improves shoe injection molding efficiency and injection molding quality.

[0004] In order to solve the above technical problems, the solution adopted by the present invention is: a shoe injection molding equipment includes a frame, on which a shoe last and a bottom mold are arranged, an injection molding groove is opened downward on the upper end surface of the bottom mold, the shoe last can slide up and down and be arranged above the injection molding groove, the lower end portion of the shoe last can be embedded in the injection molding groove, an injection molding through hole is opened on the shoe last, the feed port of the injection molding through hole is opened on the peripheral side of the shoe last, and several discharge ports of the injection molding through hole are opened on the bottom surface of the shoe last, and an injection machine capable of injecting into the injection molding through hole is arranged on the frame.

[0005] A further improvement is that: the toe position on the shoe last is defined as the front, and the feed port of the injection through hole is opened on the front end surface or the rear end surface of the peripheral side of the shoe last.

[0006] Further improvements are: The frame is provided with a conveying device, and the shoe last and bottom mold are arranged on the conveying device. superior, A stabilizing block and an injection head are detachably arranged on both sides of the shoe last, and the stabilizing block and the injection head can be slidably arranged on the frame through a first driving device. An injection through hole is opened on the injection head, and the injection through hole is connected to the injection pipe of the injection machine, and the injection through hole is connected to the injection through hole. The injection head can be in conflict with one side of the shoe last, and the stabilizing block can be in conflict with the other side of the shoe last.

[0007] A further improvement is that a stabilizing column is fixedly arranged on the stabilizing block, and a slot for the stabilizing column to penetrate is provided on the shoe last.

[0008] A further improvement is that a positioning protrusion is provided at the feed port of the injection molding through hole of the shoe last, the diameter of the positioning protrusion gradually increases from the top to the root, the positioning protrusion is provided with a first through hole connected to the injection molding through hole, the injection molding head is provided with a positioning groove matching the positioning protrusion, and the opening diameter of the positioning groove gradually decreases from the outside to the inside.

[0009] A further improvement is that the injection head includes a first connecting block and a second connecting block, the first connecting block is provided with a spherical groove, the second connecting block is fixedly provided with a spherical block, the spherical block is rotatably arranged in the spherical groove, the first connecting block is provided with an outlet for the second connecting block to pass through, and the injection through hole passes through the first connecting block, the second connecting block and the spherical block.

[0010] A further improvement is that the bottom mold includes a disengageable left mold and a right mold, connecting plates are respectively provided on both sides of the left mold and the right mold, the left mold and the right mold are respectively movably provided on the connecting plates, and releasable locking devices are respectively provided between the left mold and the right mold and the bottom plate.

[0011] Further improvements are: the locking device includes a first positioning screw, a second positioning screw, and a third positioning screw; a threaded hole is provided at the front end of the connecting plate for the first positioning screw to enter, and the front end of the left mold or the right mold can abut against the first positioning screw; threaded holes and waist holes for the second positioning screw to pass through are respectively provided on the side of the left mold or the right mold and the connecting plate; a threaded hole is provided on the connecting plate for the third positioning screw to pass through, and the side of the left mold or the right mold can abut against the third positioning screw; a driving mechanism for driving the two connecting plates to swing is provided between the two connecting plates and the frame.

[0012] Further improvements are: the shoe last is provided with a positioning mechanism for adjusting the fixed position of the shoe last on the frame, the positioning mechanism includes a positioning plate, a slide groove is provided on the positioning plate, the upper end of the shoe last is detachably provided with a plug plate, the plug plate is detachably arranged in the slide groove, an adjustment mechanism for adjusting the height of the positioning plate and the vertical projection position of the positioning plate is provided between the positioning plate and the frame, and a second driving device for driving the positioning plate to slide downward is provided between the positioning plate and the frame.

[0013] Further improvements are: the conveying device includes a workbench, and the shoe lasts and bottom molds are arranged on the workbench one by one around the rotation center axis of the workbench, and the frame is provided with a third driving device for driving the workbench to rotate, and the workbench is provided with a positioning column corresponding to each shoe last, and the frame is provided with positioning blocks for radial sliding along the workbench, and the positioning blocks are provided with a slot that matches the positioning column and is engaged with the positioning column, and the frame is provided with a fourth driving device for driving the positioning block to slide.

[0014] A shoe injection molding method, the method is based on the shoe injection molding equipment according to claims 1-10, characterized in that it comprises the following steps:

[0015] S1, putting the shoe body on the shoe last, and fixing the shoe last on the frame by inserting the plug plate into the slide groove;

[0016] S2, the left mold and the right mold separated from each other swing inwards under the drive of the driving mechanism to perform pre-mold closing, and a pre-closing gap is reserved between the left mold and the right mold;

[0017] S3, driving the shoe last to descend to a designated position through the second driving device;

[0018] S4, the driving mechanism drives the left mold and the right mold to swing inward again, the left mold and the right mold are brought together to achieve mold closing, and the lower end of the shoe last is embedded in the injection molding groove;

[0019] S5, the stabilizing block and the injection molding head slide and contact the two sides of the shoe last to firmly clamp the shoe last. At this time, the injection machine is connected with the injection through hole through the injection through hole in the injection molding head;

[0020] S6, injecting plastic into the injection molding groove through the main material through hole in the injection molding head and the injection molding through hole in the shoe last; waiting for cooling and molding;

[0021] S7, the driving mechanism drives the left mold and the right mold to swing outward to realize mold separation, and the second driving device drives the shoe last to rise, removes the injection-molded shoes from the shoe last and pulls off the material head at the same time.

[0022] By adopting the above-mentioned technical scheme, the beneficial effects of the present invention are: 1. Plastic is injected from the bottom of the shoe last, and the material head is located on the upper end surface of the sole, that is, located inside the shoe, which does not affect the overall design of the shoe, makes the design of the shoe more convenient, and improves the quality of the shoe; 2. The material head can be taken out when the shoe is removed from the shoe last, which saves operation steps and improves production efficiency; 3. The position of the shoe last and the bottom mold can be adjusted for convenient positioning. The adjusted shoe last and the bottom mold can be accurately aligned, which improves the injection molding quality of the shoe and further improves the product quality; 4. The left mold and the right mold are pre-molded when the shoe last is lowered, and then fully molded when the shoe last is lowered to the specified position, so as to avoid the shoe body not being correctly embedded in the injection molding groove after the shoe last is embedded after the full mold is closed, resulting in defective products; 5. The injection head and the shoe last are conveniently aligned, accurately aligned, and highly sealed, which reduces the failure rate of the machine during production, further improves the efficiency of injection molding, and increases product capacity. 6. It prevents the shoe body on the shoe last from being lifted up by the left and right molds, and also avoids the risk of the left and right molds breaking the shoe upper due to the shoe last dropping first and the left and right molds being closed at one time, thereby improving the yield rate of finished shoes, improving production efficiency and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a side structural schematic diagram of a shoe injection molding device according to an embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the top view of the bottom mold of an embodiment of the present invention.

[0025] Figure 3 It is a structural schematic diagram of a positioning mechanism according to an embodiment of the present invention.

[0026] Figure 4 yes Figure 1 A magnified schematic diagram of center A.

[0027] Figure 5 yes Figure 1 Cross-sectional view of BB.

[0028] Figure 6 It is a schematic structural diagram of an adjustment ring according to an embodiment of the present invention.

[0029] Figure 7 It is a side structural schematic diagram of a frame and a workbench according to an embodiment of the present invention.

[0030] Figure 8 It is a schematic diagram of the top view structure of the positioning block and the positioning column of the present invention. DETAILED DESCRIPTION

[0031] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0032] Example:

[0033] refer to Figures 1 to 8 The embodiment of the present invention discloses a shoe injection molding device, including a frame 8, on which a workbench 83 is rotatably arranged along a vertical axis, and a plurality of shoe lasts 1 and bottom molds are arranged on the workbench 83 around the rotation center axis of the workbench 83, and the bottom mold is arranged on the surface of the workbench 83, and the shoe last 1 can be raised and lowered on the workbench 83 above the bottom mold, and the projection surface positions of the two correspond one to one, and an outer gear ring 831 is fixedly arranged on the lower single surface and the rotation center of the workbench 83, and a driving motor 81 for driving the workbench 83 to rotate is arranged on the frame 8, and the housing of the driving motor 81 is fixedly arranged on the frame 8, and a gearbox (not shown in the figure) is arranged on the frame 8, and the driving shaft of the driving motor 81 is connected to the power input shaft of the gearbox, and a gear 82 is fixedly arranged on the power input shaft of the gearbox, and the gear 82 is meshed with the outer gear ring 831 for transmission.

[0034] The bottom mold includes a disengageable left mold 21 and a right mold 22. After the left mold 21 and the right mold 22 are molded together, the upper end surface has an injection molding groove 23. The shoe last 1 can slide up and down and be arranged above the injection molding groove 23. The lower end of the shoe last 1 can be embedded in the injection molding groove 23. After the shoe last 1 is embedded in the injection molding groove 23, the injection molding groove 23 still has a cavity for injection molding the sole. An injection molding through hole 13 is opened on the shoe last 1, and the toe position on the shoe last 1 is defined as the front. In order to cooperate with the disc-shaped sole injection molding machine, there is enough space to set the stabilizing block 7 and the injection molding head 6. The feed port of the injection molding through hole 13 is opened on the rear end surface of the peripheral side of the shoe last 1, and the two discharge ports 11 of the injection molding through hole 13 are opened on the bottom surface of the shoe last 1. The two discharge ports 11 are respectively opened at the forefoot and the heel of the bottom surface of the shoe last 1.

[0035] The frame 8 is provided with an injection machine (not shown in the figure), and the frame 8 can slide forward and backward through a first oil cylinder (not shown in the figure). A stabilizing block 7 and an injection head 6 are provided. The stabilizing block 7 is provided in front of the shoe last 1. The stabilizing block 7 is provided with a stabilizing groove 73 for the front peripheral side of the shoe last 1 to be inserted and abutted. In order to make the shoe last 1 more stable, a stabilizing column 72 is fixedly provided on the stabilizing block 7, and a slot for the stabilizing column 72 to penetrate is provided on the shoe last 1. When the shoe last 1 is inserted into the stabilizing groove 73, the stabilizing column 72 penetrates into the slot, and the injection head 6 is arranged at the rear of the shoe last 1. An injection through hole 65 is opened on the injection head 6. The injection through hole 65 is connected with the injection pipe of the injection machine (not shown in the figure), and the injection through hole 65 is connected with the injection through hole 13. The injection head 6 can be in conflict with the rear side of the shoe last 1, and the directions of the clamping force of the injection head 6 and the stabilizing block 7 on the shoe last 1 fall on the same straight line.

[0036] In order to make the injection head 6 and the shoe last 1 connected more tightly and avoid plastic leakage from between the injection head 6 and the shoe last 1 during injection molding, the injection head 6 includes a first connecting block 62 and a second connecting block 63. The second connecting block 63 is fixedly connected to the injection pipe of the injection machine. The first connecting block 62 is provided with a spherical groove, and the second connecting block 63 is fixedly provided with a spherical block 61. The spherical block 61 can be rotatably set in the spherical groove. The first connecting block 62 is provided with an outlet for the second connecting block 63 to pass through. The injection through hole 65 passes through the first connecting block 62, the second connecting block 63 and the spherical block 61, and acts on the active cooperation between the spherical groove and the spherical block 61. The first connecting block 62 can better fit the shoe last 1 to ensure the closeness between the injection head 6 and the shoe last 1.

[0037] In order to facilitate the alignment of the first connection block 62 and the injection through hole 13, the shoe last 1 is provided with a positioning protrusion 14 at the feed port of the injection through hole 13. The positioning protrusion 14 is a truncated cone-shaped protrusion with a diameter gradually increasing from the top to the root. The positioning protrusion 14 is provided with a first through hole 141 connected to the injection through hole 13. The first connection block 62 is provided with a positioning groove matching the positioning protrusion 14. The positioning groove is a truncated cone-shaped groove with a diameter gradually decreasing from the outside to the inside. When the injection head 6 approaches the shoe last 1, the guiding cooperation acting on the positioning protrusion 14 and the positioning groove makes the alignment of the two more convenient and further improves the sealing degree of the two.

[0038] In order to make the alignment of the positioning protrusion 14 and the positioning groove more accurate after the workbench 83 rotates, the workbench 83 is provided with a positioning column 84 corresponding to each shoe last on the lower end surface of the workbench 83, and the positioning column 84 is cylindrical. A stabilizing plate 91 is fixedly provided on the frame 8 in front of the positioning column 84, and a sliding groove is provided on the stabilizing plate 91 along the radial direction of the workbench 83. A positioning block 92 is slidingly provided in the sliding groove. The rear end surface of the stabilizing plate 91 is provided in the sliding groove for the positioning block 92 to slide out, and a fourth oil cylinder 93 is fixedly provided on the stabilizing plate 91. The cylinder body of the fourth oil cylinder 93 is fixedly arranged on the stabilizing plate 91, and the driving rod of the fourth oil cylinder 93 is fixedly connected to the front end of the positioning block 92. The positioning block 92 is provided with a circular bayonet 921 matching the positioning column 84. In order to facilitate the positioning column 84 to be inserted into the bayonet 921, a V-shaped guide groove 922 for guiding is provided on the positioning plate. When the driving motor 81 drives the workbench 83 to rotate one station, the fourth oil cylinder 93 is actuated to push the positioning plate to slide backward, and the positioning column 84 is inserted into the bayonet 921 through the V-guide groove, so that the positioning of the shoe last 1 is more accurate.

[0039] In order to facilitate the adjustment of the position between the bottom mold and the shoe last 1 so that the shoe last 1 can be accurately embedded in the injection groove 23, connecting plates 3 are respectively provided on both sides of the left mold 21 and the right mold 22. The left mold 21 and the right mold 22 are respectively movably arranged on the connecting plates 3. A threaded hole is provided at the front end of the connecting plate 3 and a first positioning screw 33 is inserted therein. The front end of the left mold 21 or the right mold 22 can abut against the first positioning screw 33. The front and rear positions of the left mold 21 or the right mold 22 can be adjusted by adjusting the first positioning screw 33. The side of the left mold 21 or the right mold 22 is provided with a second positioning screw 31 through a thread. 3 is provided with a waist hole for the second positioning screw 31 to pass through, and the connecting plate 3 is provided with a threaded hole and two third positioning screws 32 are inserted therein. The side of the left mold 21 or the right mold 22 can abut against the third positioning screw 32, and the third positioning screw 32 is respectively located in front of and behind the second positioning screw 31. When the first positioning screw 33 and the third positioning screw 32 are adjusted, that is, after the left mold 21 and the right mold 22 are positioned, the second positioning screw 31 is locked, that is, the positioning of the left mold 21 and the right mold 22 is completed, and real-time adjustment can be performed so that the shoe last 1 can be accurately embedded in the injection molding groove 23, so that the quality of the shoes after injection molding is further improved.

[0040] The frame 8 is provided with a first connecting rod 41 that can slide forward and backward, and a second oil cylinder 47 for driving the first connecting rod 41 to slide forward and backward is provided on the frame 8. The cylinder body of the second oil cylinder 47 is fixedly provided on the frame 8, and the driving rod of the second oil cylinder 47 is fixedly connected to the middle part of the first connecting rod 41. The rear ends of the two connecting plates 3 are coaxially hinged to the frame 8. The left and right ends of the first connecting rod 41 are hinged with a driving rod 43, and the side of the connecting plate 3 is hinged with a second connecting rod 44. A fixed block 46 is fixedly provided on the frame 8, and a third connecting rod 45 is hinged on the fixed block 46. The free ends of the second connecting rod 44, the third connecting rod 45, and the driving rod 43 are coaxially hinged. When the second oil cylinder 47 drives the first connecting rod 41 to slide forward, the driving rod 43 pushes the hinge between the second connecting rod 44 and the third connecting rod 45, and drives the left mold 21 and the right mold 22 to close the mold.

[0041] A third oil cylinder (not shown in the figure) is arranged on the frame 8, and the cylinder body of the third oil cylinder is fixedly arranged on the frame 8. A forward screw 57 is fixedly connected to the cylinder body of the third oil cylinder, and a reverse screw 55 is arranged below the forward screw 57. A threaded sleeve 56 is commonly sleeved on the forward screw 57 and the reverse screw 55. The threaded sleeve 56 is provided with forward threads and reverse threads that match the forward screw and the reverse screw 55. The threaded sleeve 56 is an annular sleeve, and fastening blocks 562 are respectively fixedly arranged at both ends of the annular threaded sleeve 56. The two fastening blocks 562 are respectively provided with threaded holes and through holes for the tension bolts 561 to pass through. An adjusting block 52 is fixedly provided at the lower end of the reverse screw 55, and a positioning plate 51 is provided below the adjusting block 52. The positioning plate 51 and the adjusting block 52 are respectively provided with threaded holes and waist holes for the fourth positioning screw 54 to pass through, and the adjusting block 52 is provided with a threaded through hole for the fifth positioning screw 53 to pass through. The lower end surface of the fifth positioning screw 53 can abut against the upper end surface of the positioning plate 51, and a sliding groove is provided on the positioning plate 51. The upper end of the shoe last 1 is detachably provided with an inserting plate 15 by bolts, and the inserting plate 15 is detachably provided in the sliding groove. When the height of the shoe last 1 needs to be adjusted, the loosening bolt 561 is loosened to rotate the threaded sleeve 56. When the height reaches a suitable height, the threaded sleeve 56 is locked by the loosening bolt 561. When the angle of the shoe last 1 is adjusted, the angle of the horizontal plane of the shoe last 1 can also be adjusted. The horizontal position of the shoe last 1 can be adjusted by loosening the fourth positioning screw 54. After adjustment, the fourth positioning screw 54 is locked, and the height of the shoe last 1 can be fine-tuned again by the fifth screw. The adjustment degree is very high, and the adjustment accuracy is fine, which further improves the injection molding quality of the shoe.

[0042] Shoe injection molding method, the method is based on the shoe injection molding equipment according to claims 1-9

[0043] S1, putting the shoe body on the shoe last 1, and fixing the shoe last 1 on the frame 8 by inserting the insert plate 15 into the slide groove;

[0044] S2, the left mold 21 and the right mold 22 separated from each other are swung inwards and pre-closed under the drive of the second oil cylinder 47, and a pre-closing gap is reserved between the left mold 21 and the right mold 22;

[0045] S3, driving the shoe last 1 to descend to a specified position through the second driving device, at which time the lower end surface of the shoe last 1 is lower than the upper end surfaces of the left mold 21 and the right mold 22;

[0046] S4, the left mold 21 and the right mold 22 are driven to swing inward again by the driving mechanism, the left mold 21 and the right mold 22 are brought together to achieve mold closing, and the lower end of the shoe last 1 is embedded in the injection molding groove 23;

[0047] S5, the stabilizing block 7 and the injection head 6 slide and contact the two sides of the shoe last 1 to firmly clamp the shoe last 1. At this time, the injection machine is connected with the injection through hole 13 through the injection through hole 65 in the injection head 6;

[0048] S6, inject plastic into the injection groove 23 through the main material through hole in the injection head 6 and the injection through hole 13 in the shoe last 1; wait for cooling and molding;

[0049] S7, the driving mechanism drives the left mold 21 and the right mold 22 to swing outward to achieve mold separation, and the second driving device drives the shoe last 1 to rise, remove the injection-molded shoes from the shoe last 1 and pull off the slug at the same time.

[0050] In order to clamp and position the shoe last 1 more firmly, in step S5, the stabilizing block 7, driven by the first oil cylinder, first contacts the front end surface of the peripheral side of the shoe last 1, and then the injection head 6 slides and contacts the rear end surface of the rear side of the shoe last 1, thereby completing the clamping of the shoe last 1.

[0051] By pre-molding the left mold 21 and the right mold 22, there is a certain gap between the inner wall of the injection groove 23 and the shoe last 1. At this time, the shoe last 1 is lowered to prevent the shoe body on the shoe last 1 from being lifted up by the left mold 21 and the right mold 22. At the same time, the risk of the left mold 21 and the right mold 22 clamping and breaking the shoe upper caused by the shoe last 1 being lowered first and the left mold 21 and the right mold 22 being molded at one time is also avoided. The quality of the finished shoes after injection molding is greatly improved, and the production efficiency is improved.

[0052] In the present invention, the feed port of the injection through hole 13 is opened at the rear end surface of the peripheral side of the shoe last 1, which is a preferred solution based on the application on the disc-shaped sole injection molding machine. If the orientation of the shoe last 1 is adjusted, the feed port of the injection through hole 13 can also be opened at the front end surface of the peripheral side of the shoe last 1. When the shoe last 1 of the present invention is used in a linear sole injection molding machine, the feed port of the injection through hole 13 can be opened at any position on the peripheral side of the shoe last 1 according to the characteristics of the machine.

[0053] The number of discharge ports 11 of the injection through hole 13 is two, which is also a preferred solution of the present invention. According to requirements, the number of discharge ports 11 can be one, three, or other numbers.

[0054] The modifications and changes made using this creation are all within the patent scope claimed by this creation, and are not limited to those disclosed in the embodiments.

Claims

1. A shoe injection molding device, comprising a frame, on which a shoe last and a bottom mold are arranged, an injection molding groove is opened downward on the upper end surface of the bottom mold, the shoe last can slide up and down and is arranged above the injection molding groove, and the lower end of the shoe last can be embedded in the injection molding groove, characterized in that: The shoe last is provided with an injection through hole, the feed port of the injection through hole is provided on the peripheral side of the shoe last, the plurality of discharge ports of the injection through hole are provided on the bottom surface of the shoe last, and the frame is provided with an injection machine capable of injecting into the injection through hole; The frame is provided with a conveying device, the shoe last and the bottom mold are provided on the conveying device, the two sides of the shoe last are provided with a stabilizing block and an injection head which can be disengaged and arranged respectively, the stabilizing block and the injection head can be slidably arranged on the frame through a first driving device, an injection through hole is provided on the injection head, the injection through hole is connected with an injection pipe of an injection machine, the injection through hole is connected with an injection through hole, the injection head can be in contact with one side of the shoe last, and the stabilizing block can be in contact with the other side of the shoe last; A stabilizing column is fixedly arranged on the stabilizing block, and a slot for the stabilizing column to penetrate is provided on the shoe last; The shoe last is provided with a positioning protrusion at the feed inlet of the injection through hole, the diameter of the positioning protrusion gradually increases from the top to the root, the positioning protrusion is provided with a first through hole connected to the injection through hole, the injection head is provided with a positioning groove matching the positioning protrusion, and the opening diameter of the positioning groove gradually decreases from the outside to the inside; The injection head includes a first connecting block and a second connecting block. The first connecting block is provided with a spherical groove. The second connecting block is fixedly provided with a spherical block. The spherical block can be rotatably arranged in the spherical groove. The first connecting block is provided with an outlet for the second connecting block to pass through. The injection through hole passes through the first connecting block, the second connecting block and the spherical block.

2. The shoe injection molding equipment according to claim 1, characterized in that: The toe position on the shoe last is defined as the front, and the feed port of the injection through hole is opened on the front end surface or the rear end surface of the peripheral side of the shoe last.

3. The shoe injection molding equipment according to claim 1, characterized in that: The bottom mold includes a disengageable left mold and a right mold, and connecting plates are respectively arranged on both sides of the left mold and the right mold. The left mold and the right mold are respectively movably arranged on the connecting plates, and releasable locking devices are respectively arranged between the left mold and the right mold and the bottom plate.

4. The shoe injection molding equipment according to claim 3, characterized in that: The locking device includes a first positioning screw, a second positioning screw, and a third positioning screw. A threaded hole is provided at the front end of the connecting plate for the first positioning screw to enter, and the front end of the left mold or the right mold can abut against the first positioning screw. The side of the left mold or the right mold and the connecting plate are respectively provided with threaded holes and waist holes for the second positioning screw to pass through. A threaded hole is provided on the connecting plate for the third positioning screw to pass through, and the side of the left mold or the right mold can abut against the third positioning screw. A driving mechanism for driving the two connecting plates to swing is provided between the two connecting plates and the frame.

5. The shoe injection molding equipment according to claim 1, characterized in that: The shoe last is provided with a positioning mechanism for adjusting the fixed position of the shoe last on the frame, the positioning mechanism includes a positioning plate, a slide groove is provided on the positioning plate, the upper end of the shoe last is detachably provided with a plug plate, the plug plate is detachably arranged in the slide groove, an adjustment mechanism for adjusting the height of the positioning plate and the vertical projection position of the positioning plate is provided between the positioning plate and the frame, and a second driving device for driving the positioning plate to slide downward is provided between the positioning plate and the frame.

6. The shoe injection molding equipment according to claim 1, characterized in that: The conveying device includes a workbench, and the shoe lasts and the bottom molds are arranged on the workbench in a one-to-one correspondence around the rotation center axis of the workbench. The frame is provided with a third driving device for driving the workbench to rotate. The workbench is provided with a positioning column corresponding to each shoe last. The frame is provided with a positioning block for radial sliding along the workbench. The positioning block is provided with a slot that matches the positioning column and is engaged with the positioning column. The frame is provided with a fourth driving device for driving the positioning block to slide.

7. A shoe injection molding method, the method being based on the shoe injection molding equipment according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, putting the shoe body on the shoe last, and fixing the shoe last on the frame by inserting the plug plate into the slide groove; S2, the left mold and the right mold separated from each other swing inwards under the drive of the driving mechanism to perform pre-mold closing, and a pre-closing gap is reserved between the left mold and the right mold; S3, driving the shoe last to descend to a designated position through the second driving device; S4, the driving mechanism drives the left mold and the right mold to swing inward again, the left mold and the right mold are brought together to achieve mold closing, and the lower end of the shoe last is embedded in the injection molding groove; S5, the stabilizing block and the injection molding head slide and contact the two sides of the shoe last to firmly clamp the shoe last. At this time, the injection machine is connected with the injection through hole through the injection through hole in the injection molding head; S6, injecting plastic into the injection molding groove through the main material through hole in the injection molding head and the injection molding through hole in the shoe last; waiting for cooling and molding; S7, the driving mechanism drives the left mold and the right mold to swing outward to realize mold separation, and the second driving device drives the shoe last to rise, removes the injection-molded shoes from the shoe last and pulls off the material head at the same time.

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