Production mold and production method of Goodyear sewing injection shoes

Abstract

The invention discloses a Goodyear seam injection shoe production mold and method, the production mold comprises a first clamp, a second clamp for clamping a shoe tree and a bottom mold, the upper end of the first clamp and the upper end of the second clamp are hinged and installed on an upper mold base, the bottom mold is located below the first clamp and the second clamp, the second clamp is located between two clamping rods of the first clamp, and the bottom mold is located below the second clamp. The lower ends of two clamping rods of the first clamp are connected with half seam allowance steel rings respectively, the two half seam allowance steel rings are combined to form the whole seam allowance steel ring, and the lower ends of the two clamping rods do left-right opening and closing movement to drive the seam allowance steel ring to be opened and closed. A step for placing an outer edge strip is designed at the upper end of the bottom die side wall, and the seam allowance steel ring is located on the step at the upper end of the bottom die side wall and used for fixing the outer edge strip. The bottom of the first clamp is connected with the seam allowance steel ring, the seam allowance steel ring of a left-right opening and closing structure is attached to the outer welt better, the outer welt can be fixed more conveniently, the outer welt can be effectively prevented from being bent and deformed, the quality of finished shoes is improved, and the defective rate is reduced.

Description

Technical Field

[0001] The invention belongs to the field of shoemaking, and in particular relates to a production mold and a production method for Goodyear seam injection shoes. Background Art

[0002] The advantages of traditional stitched Goodyear rubber sole shoes include: high durability, because the stitching is done by hand, the seams are very strong; good waterproof performance, because the seams are specially treated to effectively prevent water penetration; elegant appearance, the hand-stitched seams have a unique aesthetic. But there are also disadvantages: relatively heavy weight, because the density of the rubber sole is relatively high; the rubber sole is hard and has poor air permeability, which is not suitable for long-term wear in a hot and humid environment, otherwise it is easy to cause problems such as degumming; shoes made by traditional Goodyear craftsmanship are usually more expensive because of the high cost of manual production; Relatively speaking, the popular PU or TPU injection process in the market has higher production efficiency because injection molding can achieve fast cycles; better product consistency because the injection process can be precisely controlled; higher material utilization because the injection process can reduce material waste; and stronger bonding strength because PU or TPU materials can fully penetrate into the tiny gaps of the bonded materials during the injection process. If Goodyear's seam series products and injection are combined, the advantages of both can be absorbed and improved, and more comfortable products can be manufactured. Summary of the invention

[0003] Aiming at the disadvantages of traditional seam Goodyear rubber-soled shoes and the advantages of injection technology, the present invention provides a production mold and a production method of Goodyear seam injection shoes.

[0004] The objective of the present invention is achieved in the following manner: a production mold for Goodyear seam injection shoes, comprising a first clamp, a second clamp for clamping a shoe last and a bottom mold, the upper ends of the first clamp and the second clamp are hingedly mounted on an upper mold base, the bottom mold is located below the first clamp and the second clamp, the first clamp comprises a first clamping rod and a second clamping rod, the second clamp is located between the first clamping rod and the second clamping rod, the lower end of the first clamping rod is connected to a first sub-mouth steel ring, the lower end of the second clamping rod is connected to a second sub-mouth steel ring, the first sub-mouth steel ring and the second sub-mouth steel ring are combined to form a sub-mouth steel ring, the lower ends of the first clamping rod and the second clamping rod open and close left and right, driving the first sub-mouth steel ring and the second sub-mouth steel ring to open and close; a step for placing an outer edge strip is designed at the upper end of the side wall of the bottom mold, and the sub-mouth steel ring is located on the step at the upper end of the side wall of the bottom mold for fixing the outer edge strip.

[0005] The lower end of the upper die base is respectively connected to the left and right linkage disks, and the linkage disks include a rotating disk and a fixed disk. The fixed disk is fixedly connected to the upper die base, and the rotating disk is rotatably connected to the upper die base. The first clamping rod or the second clamping rod is fixedly connected to the rotating disk. The fixed disk is located in front of the rotating disk, and an arc-shaped limiting slide groove is arranged on the fixed disk. Two transmission rods are arranged between the two linkage disks, one end of the two transmission rods is hinged to each other, and the other end is hinged to the two rotating disks respectively. The hinge shaft A slides in the arc-shaped limiting slide groove, and the hinge shaft B where the two transmission rods are hinged to each other is driven by the driving mechanism to perform lifting motion, driving the two transmission rods to slide in their respective limiting slide grooves, so that the rotating disk drives the first clamping rod and the second clamping rod to realize opening and closing.

[0006] A control rod is installed on the articulated shaft B, a driving mechanism is connected to lift the control rod, and the driving mechanism is installed on the upper die seat.

[0007] The driving mechanism is a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

[0008] The bottom mold is an integrated mold.

[0009] The steps are 3 mm in width and 2 mm in height.

[0010] The method for producing Goodyear seam injection shoes using the above mold comprises the following steps: S1, connecting the outer edge strip, the midsole and the upper to form an upper with an edge strip; S2, putting the upper with welt on the shoe last; S3, hang the shoe last with the upper with the welt on the second fixture, inject the liquid injection plastic into the injection cavity of the bottom mold, merge the first fixture, and then move the upper mold base downward to close the mold with the bottom mold, place the outer welt on the step at the upper end of the bottom mold side wall, and fix the outer welt on the top of the outer welt of the first fixture. After the liquid injection plastic is foamed, an outsole integrally connected with the midsole, the outer welt (5) and the upper is formed; S4, the upper mold base rises, and the shoe last and the Goodyear seam injection shoe are taken out from the bottom mold, and then the first clamp is opened to the left and right, and the formed Goodyear seam injection shoe is taken out from the second clamp.

[0011] The liquid injection molding material is polyurethane, polyvinyl chloride or thermoplastic polyurethane elastomer rubber.

[0012] Compared with the prior art, the Goodyear seam injection shoe production mold disclosed in the present invention puts the upper with the welt on the shoe last, hangs the shoe last on the second fixture from the top, and fixes the outer welt through the sub-mouth steel ring at the bottom of the first fixture to prevent the welt from being lifted up during the foaming process of the liquid injection plastic, and the liquid injection plastic is integrally connected with the midsole, the outer welt and the upper during the foaming process. The sub-mouth steel ring is connected at the bottom of the first fixture, and the sub-mouth steel ring with a left and right opening and closing structure is more closely fitted to the outer welt, which is more convenient to fix the outer welt, can effectively prevent the outer welt from bending and deforming, improve the quality of the finished shoe, and reduce the defective rate.

[0013] Combining the Goodyear seam process with the injection process overcomes the shortcomings of traditional Goodyear shoes in terms of weight, hardness and comfort, making them more comfortable and lightweight to wear. At the same time, it simplifies the production process, reduces the difficulty of operation, makes the shoemaking process simpler and easier, and reduces the use of consumables, especially the amount of filling, outsole and glue, which significantly improves the environmental performance, reduces the use of consumables, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the Goodyear seam injection shoe production mold.

[0015] Figure 2 It is the front view of the first fixture.

[0016] Figure 3 is a side view of the first clamp.

[0017] Figure 4 is a top view of the first fixture.

[0018] Figure 5 This is the main view of the base mold.

[0019] Figure 6 It is a side view of the base mold.

[0020] Figure 7 This is a top view of the base mold.

[0021] Figure 8 It is a schematic diagram of the structure of a shoe last.

[0022] Fig. 9 It is a schematic diagram of the structure of a shoe upper with a welt.

[0023] Fig.10 It is a Goodyear seam injection shoe before and after trimming.

[0024] Fig.11 It is a structural schematic diagram of the first clamp in the open and closed state.

[0025] Fig.12 is a side view of the first fixture.

[0026] Fig.13 It is a structural diagram of the Goodyear seam injection shoe manufacturing process. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present invention.

[0028] like Figure 1 As shown, a Goodyear seam injection shoe production mold includes a first clamp 1, a second clamp 2 for clamping a shoe last, and a bottom mold 3. The upper ends of the first clamp 1 and the second clamp 2 are hingedly mounted on an upper mold base 4, and the bottom mold 3 is located below the first clamp 1 and the second clamp 2. Figure 2-4 As shown, the first clamp 1 includes a first clamping rod 11 and a second clamping rod 12, the second clamp 2 is located between the first clamping rod 11 and the second clamping rod 12, the lower end of the first clamping rod 11 is connected to the first sub-mouth steel ring 131, the lower end of the second clamping rod 12 is connected to the second sub-mouth steel ring 132, the first sub-mouth steel ring 131 and the second sub-mouth steel ring 132 are combined to form the sub-mouth steel ring 13, the lower ends of the first clamping rod 11 and the second clamping rod 12 open and close left and right, driving the first sub-mouth steel ring 131 and the second sub-mouth steel ring 132 to open and close; as shown Figure 5-7 As shown, a step 31 is designed at the upper end of the side wall of the bottom mold 3 for placing the outer edge strip 5. The step 31 is preferably 3 mm wide and 2 mm high. The sub-mouth steel ring 13 is located on the step 31 at the upper end of the side wall of the bottom mold to fix the outer edge strip 5.

[0029] The Goodyear seam injection shoe production mold disclosed in the present invention is to put the upper with the welt on the shoe last, and hang the shoe last on the second clamp from the top. The outer welt is fixed by the sub-mouth steel ring at the bottom of the first clamp to prevent the welt from being lifted up during the foaming process of the liquid injection plastic. The liquid injection plastic is integrally connected with the midsole, the outer welt and the upper during the foaming process. The sub-mouth steel ring and the left and right opening and closing structures are connected at the bottom of the first clamp. The sub-mouth steel ring is more closely fitted with the outer welt, which is more convenient for fixing the outer welt. The width of the sub-mouth steel ring is slightly larger than the width of the outer welt. Compared with the upper and lower mold structures, it is more convenient to observe the deformation of the outer welt, which can effectively prevent the outer welt from bending and deforming, improve the quality of the finished shoes, and reduce the defective rate.

[0030] In a further preferred embodiment, the bottom mold 3 is an integrated mold without side and bottom molds. The shoe outsole formed by the integrated mold structure is smooth and flat, has no joints, and has a more beautiful appearance, avoiding the need to modify the shoe outsole. Depending on the type of shoe produced, the bottom mold can also be set as a split structure.

[0031] like Fig.11 and Fig.12 As shown, the lower end of the upper mold base 4 is respectively connected to the left and right linkage disks 41, the first linkage disk 411 includes a first rotating disk 421 and a first fixed disk 431, the first fixed disk 431 is fixedly connected to the upper mold base 4, the first rotating disk 421 is rotatably connected to the upper mold base 4, the first rotating disk 421 is fixedly connected to the first clamping rod 11, the first fixed disk 431 is located in front of the first rotating disk 421, and an arc-shaped limiting groove 44 is arranged on the first fixed disk 431, the second linkage disk 412 includes a second rotating disk 422 and a second fixed disk 432, the second fixed disk 432 is fixedly connected to the upper mold base 4, the second rotating disk 422 is rotatably connected to the upper mold base 4, the second rotating disk 422 is fixedly connected to the second clamping rod 12, the second fixed disk 432 is located in front of the second rotating disk 422, and the second fixed disk 432 is located in front of the second rotating disk 422. An arc-shaped limiting slot 44 is arranged on the fixed plate 432, and two transmission rods 45 are arranged between the two linkage plates 41. The first transmission rod 451 and the second transmission rod 452 are hinged to each other, and the other end of the first transmission rod 451 is hinged to the first rotating plate 421, and the hinge axis is A. The other end of the second transmission rod 452 is hinged to the second rotating plate 422, and the hinge axis is A'. The hinge axis A and the hinge axis A' slide in their respective arc-shaped limiting slots 44, and the hinge axis B where the first transmission rod 451 and the second transmission rod 452 are hinged to each other is driven by the driving mechanism to perform lifting motion, and the first transmission rod 451 and the second transmission rod 452 slide in their respective limiting slots 44, thereby driving the first rotating plate 421 and the second rotating plate 422 to drive the first clamping rod 11 and the second clamping rod 12 to open and close.

[0032] Further, a control rod 46 is installed on the articulated shaft B, and a driving mechanism is connected to the control rod 46 to lift and lower, and the driving mechanism is installed on the upper die base 4. The driving mechanism is preferably a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

[0033] like Fig.13 As shown, the method for producing Goodyear seam injection shoes using the above mold includes the following steps: S1, connecting the outer edge strip, the midsole and the upper to form an upper with an edge strip; S2, see Figure 8 and Fig. 9 , the upper with welt 7 is set on the shoe last 6; S3, hang the shoe last 6 with the upper with welt 7 on the second fixture 2, inject the liquid injection plastic into the injection cavity 32 of the bottom mold 3, merge the first fixture 1, and then move the upper mold base 4 downward to close the mold with the bottom mold 3, place the outer edge strip 5 on the step 31 at the upper end of the bottom mold side wall, and fix the outer edge strip 5 above the outer edge strip to prevent the edge strip from being lifted up during the foaming of the liquid injection plastic. Control the shoe last 6 and the upper with welt 7 through the fixture and pressurize them downward until they are completely combined with the bottom mold 3. After the liquid injection plastic is foamed, an outsole integrally connected with the midsole, the outer edge strip 5 and the upper is formed; S4, the upper mold base 4 rises, and the shoe last and the Goodyear seam injection shoe are taken out from the bottom mold 3, and then the first clamp 1 is opened left and right, and the formed Goodyear seam injection shoe is taken out from the second clamp 2. Fig.10 As shown in a, the formed Goodyear seam injection shoe is then polished and modified along the edge to obtain a product as shown in Fig.10 As shown in b.

[0034] The liquid injection molding material is polyurethane (PU), thermoplastic polyurethane elastomer rubber (TPU) or polyvinyl chloride (PVC).

[0035] It is particularly important to point out that Fig.11 and Fig.13 The middle dotted line represents a schematic diagram of another state of the first clamp and the transmission rod, that is, a schematic diagram of the first clamp in an open state; the solid line represents a schematic diagram of the first clamp in a closed state.

[0036] Combining the Goodyear seam process with the PU injection process overcomes the shortcomings of traditional Goodyear shoes in terms of weight, hardness and comfort, making them more comfortable and lightweight to wear. At the same time, it simplifies the production process, reduces the difficulty of operation, and makes the shoemaking process simpler and easier. At the same time, it reduces the use of consumables, especially the amount of filling, outsole and glue, which significantly improves the environmental performance, reduces the use of consumables, and reduces production costs.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. A production mold for Goodyear seam injection shoes, characterized in that: The shoe last comprises a first clamp (1), a second clamp (2) for clamping a shoe last, and a bottom mold (3); the upper ends of the first clamp (1) and the second clamp (2) are hingedly mounted on an upper mold base (4); the bottom mold (3) is located below the first clamp (1) and the second clamp (2); the first clamp (1) comprises a first clamping rod (11) and a second clamping rod (12); the second clamp (2) is located between the first clamping rod (11) and the second clamping rod (12); the lower end of the first clamping rod (11) is connected to a first sub-mouth steel ring (131); the second clamping rod ( The lower end of the first clamping rod (11) and the lower end of the second clamping rod (12) are connected to the second sub-mouth steel ring (132), the first sub-mouth steel ring (131) and the second sub-mouth steel ring (132) are combined to form a sub-mouth steel ring (13), the lower ends of the first clamping rod (11) and the second clamping rod (12) move left and right to open and close, driving the first sub-mouth steel ring (131) and the second sub-mouth steel ring (132) to open and close; the upper end of the side wall of the bottom mold (3) is designed to place the outer edge strip (5) on the step (31), and the sub-mouth steel ring (13) is located on the step (31) at the upper end of the side wall of the bottom mold for fixing the outer edge strip (5).

2. The production mold of Goodyear seam injection shoes according to claim 1, characterized in that: The lower end of the upper die seat (4) is respectively connected to the left and right linkage disks (41), and the linkage disks (41) include a rotating disk (42) and a fixed disk (43). The fixed disk (43) is fixedly connected to the upper die seat (4), and the rotating disk (42) is rotatably connected to the upper die seat (4). The rotating disk (42) is fixedly connected to the first clamping rod (11) or the second clamping rod (12). The fixed disk (43) is located in front of the rotating disk (42). An arc-shaped limiting sliding groove (44) is provided on the fixed disk (43). The two linkage disks Two transmission rods (45) are arranged between the two rotating disks (41), one end of the two transmission rods (45) is hinged to each other, and the other end is hinged to the two rotating disks (42), respectively, and the hinge axis A slides in the arc-shaped limit slide groove (44), and the hinge axis B at which the two transmission rods (45) are hinged to each other is driven by the driving mechanism to perform lifting movement, driving the two transmission rods (45) to slide in their respective limit slide grooves (44), so that the rotating disk (42) drives the first clamping rod (11) and the second clamping rod (12) to open and close.

3. The production mold of Goodyear seam injection shoes according to claim 1, characterized in that: A control rod (46) is installed on the hinge shaft B, and a driving mechanism is connected to the control rod (46) to move up and down, and the driving mechanism is installed on the upper die base (4).

4. The Goodyear seam injection shoe production mold according to claim 3, characterized in that: The driving mechanism is a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

5. The production mold of Goodyear seam injection shoes according to claim 1, characterized in that: The bottom mold (3) is an integrated mold.

6. The production mold of Goodyear seam injection shoes according to claim 1, characterized in that: The step (31) has a width of 3 mm and a height of 2 mm.

7. A method for producing Goodyear seam injection shoes using any one of the molds of claims 1 to 6, characterized in that: The following steps are included: S1, connecting the outer edge strip, the midsole and the upper to form an upper with an edge strip; S2, putting the shoe upper with welt (7) on the shoe last (6); S3, hang the shoe last (6) with the upper with welt (7) on the second fixture (2), inject liquid injection plastic into the injection cavity (32) of the bottom mold (3), merge the first fixture (1), and then move the upper mold base (4) downward to close the mold with the bottom mold (3), place the outer welt (5) on the step (31) at the upper end of the side wall of the bottom mold, and fix the outer welt (5) on the outer welt of the first fixture (1). After the liquid injection plastic is foamed, an outsole integrally connected with the midsole, the outer welt (5) and the upper is formed; S4, the upper mold base (4) rises, and the shoe last and the Goodyear seam injection shoe are taken out from the bottom mold (3), and then the first clamp (1) is opened to the left and right, and the formed Goodyear seam injection shoe is taken out from the second clamp (2).

8. The method for producing Goodyear seam injection shoes according to claim 7, characterized in that: The liquid injection molding material is polyurethane, polyvinyl chloride or thermoplastic polyurethane elastomer rubber.

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