A plastic injection molding device for shoe upper

Abstract

The present invention discloses a plastic injection molding device for a shoe upper, which relates to the technical field of injection molding equipment, including a fixed mold, a movable mold and a pressing tool, and also includes: an adjustment component, which is arranged on the fixed mold and is used to produce shoe uppers of different sizes; wherein the adjustment component includes a first notch, the first notch is arranged on both sides of the fixed mold, a fixed shaft is installed inside the first notch, a slider and a first spring are sleeved on the outer surface of the fixed shaft, a second knob is threadedly connected to the outer side of the slider, a spring steel sheet is connected to the top of the slider, a movable rod is connected to the bottom of the spring steel sheet, an extrusion is installed on the outer surface of the movable rod, the outer surface of the movable rod is rotatably connected to the first knob, and a fixed rod is installed inside the fixed mold. When the movable rod moves downward, the spring steel sheet will be pulled to change the inner arc size of the spring steel sheet, so that shoe uppers of different sizes can be injection molded.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding equipment, in particular to a shoe upper plastic injection molding device. Background Art

[0002] Plastic injection molding is a method of making plastic products. The molten plastic is injected into the plastic product mold under pressure, and the desired plastic parts are obtained by cooling and molding. There are mechanical injection molding machines specifically used for injection molding.

[0003] When producing some plastic slippers, it is usually necessary to produce the soles and uppers of the slippers separately and then assemble them. The uppers of the slippers are usually arc-shaped plastic strips, which are usually formed by injection molding. Since slippers have different sizes, the sizes of the plastic strips on the uppers are different. Therefore, different types of injection molds are often required when producing uppers of different sizes. Therefore, it is difficult for a single mold to produce uppers of different sizes. When producing uppers of different sizes, the mold needs to be replaced. The need to match molds of various sizes and the time required to replace the molds increase the cost of producing the uppers. Summary of the invention

[0004] The purpose of the present invention is to remedy the deficiencies of the prior art and to provide a shoe upper plastic injection molding device.

[0005] To achieve the above object, the present invention provides the following technical solution: a shoe upper plastic injection molding device, comprising a fixed mold, a movable mold and a pressing tool, and also comprising:

[0006] An adjustment component, which is arranged on the fixed mold and is used to produce shoe uppers of different sizes;

[0007] Among them, the adjustment component includes a first slot, the first slot is arranged on both sides of the fixed mold, a fixed shaft is installed inside the first slot, a slider and a first spring are sleeved on the outer surface of the fixed shaft, a second knob is threadedly connected to the outer side of the slider, a spring steel sheet is connected to the top of the slider, a movable rod is connected to the bottom of the spring steel sheet, an extrusion piece is installed on the outer surface of the movable rod, the outer surface of the movable rod is rotatably connected to the first knob, a fixed rod is installed inside the fixed mold, a second spring and a movable frame are sleeved on the outer surface of the fixed rod, a first top block is installed on the top of the movable frame, a second top block is installed on the bottom end of the movable frame, and a round tube is arranged inside the fixed mold.

[0008] As a preferred solution of the present invention, a support rod is installed inside the movable mold, and a movable plate and a third spring are sleeved on the outer surface of the support rod. A nut is threadedly connected to the outer surface of the support rod. A feed pipe is installed at the bottom of the movable plate, and an arc block is connected to the bottom end of the feed pipe. A one-way valve is provided at the bottom end of the feed pipe. A feed pipe is installed on the top of the movable mold, and a second slot is opened inside the movable mold. A fourth spring and a movable part are sleeved on the outer surface of the second slot, and a top plate is connected to the end of the movable part.

[0009] As a preferred solution of the present invention, the pressing tool is an independent tool, the pressing tool has a variety of different sizes, and the pressing tool is in compression contact with the middle of the spring steel sheet.

[0010] As a preferred solution of the present invention, the second knob passes through the first slot and extends to the outside of the fixed mold, the second knob is in extrusion contact with the fixed mold, and the first spring is elastically supported between the slider and the first slot.

[0011] As a preferred solution of the present invention, the bottom end of the extrusion piece is tapered, and the extrusion piece is in extrusion contact with the second top block.

[0012] As a preferred solution of the present invention, the second spring is elastically supported between the fixed mold and the movable frame, and the first top block abuts against the bent portion of the spring steel sheet.

[0013] As a preferred solution of the present invention, the bottom end of the movable rod passes through the fixed mold, the first knob is threadedly connected to the bottom of the fixed mold, and the round tube is connected to an external negative pressure pump.

[0014] As a preferred solution of the present invention, the nut is in compression contact with the movable plate, and the third spring is elastically supported between the movable mold and the movable plate.

[0015] As a preferred solution of the present invention, the fourth spring is elastically supported between the second notch and the movable member, the top plate abuts against the arc block, and the bottom end of the feed pipe passes through the movable plate and is sleeved with the conveying pipe.

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

[0017] 1. The present invention cooperates with the first knob and the fixed mold so that when the first knob is rotated, it can drive the movable rod to move downward, so that the movable rod can drive the extrusion member to extrude the second top block. At the same time, through the cooperation between the movable frame and the fixed rod, it can drive the movable frame to move along the outer surface of the fixed rod and change the position of the first top block abutting against the spring steel sheet. When the movable rod moves downward, it will pull the spring steel sheet to change the inner arc size of the spring steel sheet, thereby enabling injection molding operations on shoe uppers of different sizes.

[0018] 2. The present invention enables the first knob to rotate along the outer surface of the movable rod through the cooperation between the first knob and the movable rod, so that the first knob can drive the movable rod to move up and down when the first knob rotates and moves along the bottom of the fixed mold through the cooperation between the first knob and the fixed mold. At the same time, through the cooperation between the movable rod and the spring steel sheet, the spring steel sheet can be pushed to move when the movable rod moves upward, and then the injection-molded shoe upper can be ejected when it is embedded in the inner arc of the spring steel sheet and is difficult to demold.

[0019] 3. The present invention enables the nut to rotate and move up and down along the outer surface of the support rod through the cooperation between the nut and the support rod. At the same time, through the cooperation between the nut and the movable plate, the movable plate can be squeezed when the nut moves downward, so that the feed pipe can be driven by the movable plate to move the arc block downward, thereby controlling the distance between the arc block and the spring steel sheet, and further controlling the thickness of the produced shoe upper.

[0020] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a cross-sectional structural schematic diagram of the front side of the present invention;

[0023] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 4 It is a structural schematic diagram of the pressing tool of the present invention;

[0025] Figure 5 It is a cross-sectional structural schematic diagram of the movable mold of the present invention;

[0026] Figure 6 It is a schematic diagram of the disassembly structure of the fixed mold and the movable mold of the present invention;

[0027] Figure 7 It is a schematic diagram of the cross-sectional structure of the side of the present invention.

[0028] In the figure: 1. fixed mold; 2. movable mold; 3. first notch; 4. fixed shaft; 5. slider; 6. first spring; 7. spring steel sheet; 8. movable rod; 9. first knob; 10. extrusion piece; 11. fixed rod; 12. second spring; 13. movable frame; 14. first top block; 15. second top block; 16. support rod; 17. movable plate; 18. third spring; 19. nut; 20. feed pipe; 21. arc block; 22. feed pipe; 23. second notch; 24. fourth spring; 25. movable part; 26. top plate; 27. one-way valve; 28. round tube; 29. ​​second knob; 30. pressing tool. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1-7 As shown, the present invention provides a technical solution: a shoe upper plastic injection molding device, including a fixed mold 1, a movable mold 2 and a pressing tool 30, and also includes:

[0031] An adjustment component, which is arranged on the fixed mold 1 and is used to produce shoe uppers of different sizes;

[0032] Among them, the adjustment component includes a first slot 3, which is arranged on both sides of the fixed mold 1, a fixed shaft 4 is installed inside the first slot 3, a slider 5 and a first spring 6 are sleeved on the outer surface of the fixed shaft 4, the outer side of the slider 5 is threadedly connected to the second knob 29, the top of the slider 5 is connected to the spring steel sheet 7, the bottom of the spring steel sheet 7 is connected to the movable rod 8, the outer surface of the movable rod 8 is installed with an extrusion part 10, the outer surface of the movable rod 8 is rotatably connected to the first knob 9, a fixed rod 11 is installed inside the fixed mold 1, the outer surface of the fixed rod 11 is sleeved with the second spring 12 and a movable frame 13, the top of the movable frame 13 is installed with a first top block 14, the bottom of the movable frame 13 is installed with a second top block 15, and a round tube 28 is arranged inside the fixed mold 1.

[0033] Through the cooperation between the first knob 9 and the fixed mold 1, the first knob 9 can drive the movable rod 8 to move downward when it is rotated, so that the extrusion member 10 can be driven by the movable rod 8 to make the extrusion member 10 extrude the second top block 15. At the same time, through the cooperation between the movable frame 13 and the fixed rod 11, the movable frame 13 can be driven to move along the outer surface of the fixed rod 11, so that the position of the first top block 14 abutting the spring steel sheet 7 can be changed, and when the movable rod 8 moves downward, the spring steel sheet 7 will be pulled, so that the size of the inner arc of the spring steel sheet 7 can be changed, and through the cooperation between the pressing tool 30 and the spring steel sheet 7, the spring steel sheet 7 can be pressed to make the inner arc of the spring steel sheet 7 smoother. At the same time, through the cooperation between the second knob 29 and the slider 5, when the second knob 29 squeezes the outer side of the fixed mold 1, the slider 5 will be restricted from moving up and down, so that the two ends of the spring steel sheet 7 can be limited to avoid the deformation of the inner arc of the spring steel sheet 7 caused by the elastic force of the first spring 6, so that the shoe uppers of different sizes can be injection molded.

[0034] like Figure 5 As shown, a support rod 16 is installed inside the movable mold 2, and a movable plate 17 and a third spring 18 are sleeved on the outer surface of the support rod 16. A nut 19 is threadedly connected to the outer surface of the support rod 16. A feed pipe 20 is installed at the bottom of the movable plate 17, and an arc block 21 is connected to the bottom end of the feed pipe 20. A one-way valve 27 is provided at the bottom end of the feed pipe 20. A feed pipe 22 is installed on the top of the movable mold 2. A second slot 23 is opened inside the movable mold 2, and a fourth spring 24 and a movable part 25 are sleeved on the outer surface of the second slot 23, and a top plate 26 is connected to the end of the movable part 25.

[0035] Through the cooperation between the nut 19 and the support rod 16, when the nut 19 rotates along the outer surface of the support rod 16, the movable plate 17 can be squeezed downward, so that the feed pipe 20 can be driven to move downward through the movable plate 17. At this time, the feed pipe 20 will drive the arc block 21 to move downward, so that the arc surface of the arc block 21 that exceeds the movable mold 2 is enlarged, and can be adapted to the arc surface of the spring steel sheet 7, which is convenient for the production of shoe uppers of different sizes and can control the thickness of the shoe uppers.

[0036] like Figure 4 As shown, the pressing tool 30 is an independent tool. The pressing tool 30 has a variety of different sizes. The pressing tool 30 is in pressing contact with the middle of the spring steel sheet 7 .

[0037] Through the design of the pressing tool 30, the spring steel sheet 7 can be pressed so that the inner arc of the spring steel sheet 7 can fit with the arc surface of the pressing tool 30, wherein the pressing tool 30 is customized according to the size of the upper. By controlling the inner arc of the spring steel sheet 7 to fit with the pressing tool 30, the size of the produced upper can be made more precise. At the same time, by setting multiple groups of pressing tools 30, the spring steel sheet 7 can be controlled to adapt to uppers of different sizes, and then uppers of different sizes can be injection molded.

[0038] like Figure 3 As shown, the second knob 29 passes through the first slot 3 and extends to the outside of the fixed mold 1 , the second knob 29 is in compression contact with the fixed mold 1 , and the first spring 6 is elastically supported between the slider 5 and the first slot 3 .

[0039] Through the cooperation between the second knob 29 and the slider 5, the second knob 29 can rotate and move along the inner side of the slider 5. At the same time, through the cooperation between the second knob 29 and the fixed mold 1, the second knob 29 will squeeze the fixed mold 1 when it moves, so that the slider 5 can be limited by the friction between the second knob 29 and the fixed mold 1. At the same time, through the limitation of the slider 5, the two ends of the spring steel sheet 7 can be limited, so that the tension on the two ends of the spring steel sheet 7 can be avoided to cause the spring steel sheet 7 to deform, thereby improving the stability during injection molding. At the same time, through the design of the first spring 6, the slider 5 has good elastic reset performance. At this time, since the first spring 6 is in a compressed state, an elastic force will be applied to the slider 5. When the movable rod 8 pushes the spring steel sheet 7 to move upward, the first spring 6 will move downward along the outer surface of the fixed shaft 4 through the slider 5, so that the two ends of the spring steel sheet 7 can be pulled downward through the slider 5, causing the spring steel sheet 7 to deform, which is convenient for controlling the size of the inner arc of the spring steel sheet 7.

[0040] like Figure 2 As shown, the bottom end of the extrusion piece 10 is tapered, and the extrusion piece 10 is in extrusion contact with the second top block 15 .

[0041] Through the cooperation between the extrusion piece 10 and the second top block 15, when the extrusion piece 10 squeezes the second top block 15, it will drive the two groups of second top blocks 15 to move away from each other. At the same time, through the cooperation between the movable frame 13 and the second spring 12, the second top block 15 can drive the movable frame 13 to expand the position where the first top block 14 abuts against the spring steel sheet 7 to both sides, thereby controlling the increase of the inner arc of the spring steel sheet 7, so that it can perform injection molding processing on a larger size of shoe upper.

[0042] like Figure 2 As shown, the second spring 12 is elastically supported between the fixed mold 1 and the movable frame 13 , and the first top block 14 abuts against the bent portion of the spring steel sheet 7 .

[0043] Through the design of the second spring 12, the movable frame 13 has good elastic reset performance. At this time, since the second spring 12 is in a compressed state, an elastic force will be applied to the movable frame 13, so that the first top block 14 can be driven by the movable frame 13 to contact the spring steel sheet 7, so that the three points of the arc-shaped part of the spring steel sheet 7 can be limited by the movable rod 8 and the two groups of first top blocks 14. At this time, the spring steel sheet 7 can be pressed by the pressing tool 30 to change the inner arc size of the spring steel sheet 7, thereby facilitating the control of the size of the inner arc of the spring steel sheet 7.

[0044] like Figure 2 As shown, the bottom end of the movable rod 8 passes through the fixed mold 1, the first knob 9 is threadedly connected to the bottom of the fixed mold 1, and the round tube 28 is connected to an external negative pressure pump.

[0045] Through the cooperation between the first knob 9 and the fixed mold 1, the movable rod 8 can be driven to move up and down, so that the movable rod 8 can be controlled to pull the spring steel sheet 7, so that the size of the inner arc of the spring steel sheet 7 increases. At the same time, through the design of the round tube 28, the gas below the spring steel sheet 7 can be extracted by a negative pressure pump, so that the bottom of the spring steel sheet 7 can be vacuumed, thereby making the spring steel sheet 7 less likely to deform during the injection molding process.

[0046] like Figure 5 As shown, the nut 19 is in compression contact with the movable plate 17 , and the third spring 18 is elastically supported between the movable mold 2 and the movable plate 17 .

[0047] Through the design of the movable rod 8, the movable plate 17 has good elastic reset performance. At this time, since the movable rod 8 is in a compressed state, an elastic force is applied to the movable plate 17, so that when the nut 19 contacts the movable plate 17, it can drive the movable plate 17 to move upward.

[0048] like Figure 2 , 5 As shown, the fourth spring 24 is elastically supported between the second notch 23 and the movable member 25 , the top plate 26 abuts against the arc block 21 , and the bottom end of the feed pipe 22 passes through the movable plate 17 and is sleeved with the conveying pipe 20 .

[0049] Through the design of the fourth spring 24, the movable part 25 has good elastic reset performance. At this time, since the fourth spring 24 is in a compressed state, an elastic force will be applied to the movable part 25, so that the top plate 26 can be driven by the movable part 25 to fit the arc surface of the arc block 21, and then when the fixed mold 1 and the movable mold 2 are closed, the space between the spring steel sheet 7 and the arc block 21 is closed to avoid overflow during injection molding.

[0050] Working principle:

[0051] When it is necessary to produce uppers of different sizes, the staff can turn the first knob 9 to control the movable rod 8 to move upward or downward. When the first knob 9 moves upward, the extrusion member 10 will be driven upward by the movable rod 8, thereby releasing the extrusion of the movable frame 13. At this time, the elastic force of the second spring 12 will push the movable frame 13 to move along the outer surface of the fixed rod 11, so that the first top block 14 can be used to squeeze the two sides of the arc of the spring steel sheet 7, and the upward movement of the movable rod 8 will push the bottom of the spring steel sheet 7 upward. At this time, the elastic force of the first spring 6 will drive the slider 5 to pull the two ends of the spring steel sheet 7 downward, so that the inner arc of the spring steel sheet 7 is reduced, and then the inside of the spring steel sheet 7 is pressed by the corresponding pressing tool 30 to make the inner arc of the spring steel sheet 7 coincide with the inner arc of the spring steel sheet 7. The arc surface of the pressing tool 30 fits, and through the cooperation between the second knob 29 and the slider 5, the outer side of the fixed mold 1 can be squeezed by rotating the second knob 29, so that the spring steel sheet 7 can be positioned by the slider 5, and then the air under the spring steel sheet 7 can be extracted by a negative pressure pump through the circular tube 28, so that the shape of the spring steel sheet 7 is more stable under the influence of negative pressure, and then the uppers of different sizes can be injection molded. At the same time, the movable plate 17 is driven to move downward along the outer surface of the support rod 16 by rotating the nut 19, and the distance between the arc block 21 and the spring steel sheet 7 can be controlled by the feed pipe 20, so the thickness of the injection molding of the upper can be controlled, and due to the elastic force of the fourth spring 24, the top plate 26 is always in a fit state with the outer arc of the arc block 21, which can prevent the injection molding material from overflowing.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shoe upper plastic injection molding device, comprising a fixed mold (1), a movable mold (2) and a pressing tool (30), characterized in that: Also includes: An adjustment component, which is arranged on the fixed mold (1) and is used to produce shoe uppers of different sizes; The adjustment component comprises a first notch (3), the first notch (3) being arranged on both sides of the fixed mold (1), a fixed shaft (4) being installed inside the first notch (3), a slider (5) and a first spring (6) being sleeved on the outer surface of the fixed shaft (4), a second knob (29) being threadedly connected to the outer side of the slider (5), a spring steel sheet (7) being connected to the top of the slider (5), a movable rod (8) being connected to the bottom of the spring steel sheet (7), an extrusion piece (10) being installed on the outer surface of the movable rod (8), a first knob (9) being rotatably connected to the outer surface of the movable rod (8), a fixed rod (11) being installed inside the fixed mold (1), a second spring (12) and a movable frame (13) being sleeved on the outer surface of the fixed rod (11), a first top block (14) being installed on the top of the movable frame (13), a second top block (15) being installed on the bottom of the movable frame (13), and a round tube (28) being arranged inside the fixed mold (1); The pressing tool (30) is an independent tool, the pressing tool (30) has a variety of different sizes, and the pressing tool (30) is in extrusion contact with the middle of the spring steel sheet (7); The bottom end of the extrusion piece (10) is tapered, and the extrusion piece (10) is in extrusion contact with the second top block (15); The second knob (29) passes through the first notch (3) and extends to the outside of the fixed mold (1), the second knob (29) is in extrusion contact with the fixed mold (1), and the first spring (6) is elastically supported between the slider (5) and the first notch (3); The second spring (12) is elastically supported between the fixed mold (1) and the movable frame (13), and the first top block (14) abuts against the bent portion of the spring steel sheet (7); The bottom end of the movable rod (8) passes through the fixed mold (1), the first knob (9) is threadedly connected to the bottom of the fixed mold (1), and the round tube (28) is connected to an external negative pressure pump.

2. A shoe upper plastic injection molding device according to claim 1, characterized in that: A support rod (16) is installed inside the movable mold (2), and a movable plate (17) and a third spring (18) are sleeved on the outer surface of the support rod (16). A nut (19) is threadedly connected to the outer surface of the support rod (16). A material delivery pipe (20) is installed at the bottom of the movable plate (17), and an arc block (21) is connected to the bottom end of the material delivery pipe (20). A one-way valve (27) is provided at the bottom end of the material delivery pipe (20). A feed pipe (22) is installed on the top of the movable mold (2). A second notch (23) is opened inside the movable mold (2), and a fourth spring (24) and a movable part (25) are sleeved on the outer surface of the second notch (23), and the end of the movable part (25) is connected to a top plate (26).

3. A shoe upper plastic injection molding device according to claim 2, characterized in that: The nut (19) is in compression contact with the movable plate (17), and the third spring (18) is elastically supported between the movable mold (2) and the movable plate (17).

4. A shoe upper plastic injection molding device according to claim 2, characterized in that: The fourth spring (24) is elastically supported between the second notch (23) and the movable member (25), the top plate (26) is in contact with the arc block (21), and the bottom end of the feed pipe (22) passes through the movable plate (17) and is sleeved with the conveying pipe (20).

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