A press structure for sole and upper bonding
By setting a second pressure head at the heel and forefoot or instep of the shoe last, the problem of uneven pressure in the pressing machine is solved, resulting in a more balanced pressing effect and reduced costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG KEMANQI BIOTECHNOLOGY CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-05-29
AI Technical Summary
In existing shoe manufacturing processes, the pressure distribution of the pressing machine on the shoe is uneven, resulting in excessive pressure on the heel area, which easily causes indentations and mold damage, and also increases costs.
Design a pressing structure including a first pressing head and a second pressing head. The first pressing head is located at the heel of the shoe last, and the second pressing head is located at the forefoot or instep. The position and pressure of the two pressing heads are adjusted by an adjustment device to ensure even pressure distribution.
This achieves balanced pressure between the front and back of the shoe, reduces the pressure required for pressing, avoids excessive deformation of the sole and damage to the mold, and reduces production costs.
Smart Images
Figure CN224291399U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of shoemaking equipment technology, specifically to a pressing structure for bonding shoe soles and uppers. Background Technology
[0002] There are various shoe-making processes, and gluing is a common one. This process involves upper making, where cut pieces of material are sewn together and glued to form the upper. The upper is then fitted onto a shoe last, and after clamping and shaping, the basic upper shape is formed. Glue is then applied to the foot area and the sole to bond them together. This process is called gluing. During the gluing process, the foot is usually roughened first. Roughening involves rubbing the foot with a rough surface using a grinding wheel or sandpaper to create a rough surface (this requires dust removal). This increases the bonding contact area and reduces issues like delamination, insufficient glue, and separation in the upper-sole composite. In practice, to achieve the above, a pressing process is usually required. After pressing the glued sole onto the upper, a pressing machine is used to press them together. Under pressure, the glue penetrates into the grooves of the roughened surface. Due to the shape of the foot and shoe, the shoe opening is formed above the heel. The pressing machine is generally pressed onto the last of the shoe opening, so the pressing position is significantly further back. The pressure on the forefoot is significantly less than that on the rear. To ensure that the glue can fully penetrate the forefoot area, the pressure of the pressing machine needs to be increased, generally reaching 6-8 standard atmospheres. However, excessive pressure can easily create indentations on the sole and places higher demands on the materials used in the mold, press head, hydraulic cylinder, and piping, thus increasing costs. Utility Model Content
[0003] In view of the above shortcomings, the purpose of this utility model is to provide a pressing structure that can apply pressure to the shoe more evenly.
[0004] Therefore, this utility model provides a pressing structure for bonding shoe soles and uppers, including a pressing head. The pressing head applies a set pressure to a shoe last. A corresponding groove is provided below the pressing head for positioning the shoe to be pressed. The pressing head includes a first pressing head and a second pressing head. The first pressing head corresponds to the heel position of the shoe last, and the second pressing head is located between the toe and heel of the corresponding shoe last.
[0005] Furthermore, the first and second pressure heads are fixed on the crossbeam, the crossbeam is fixed on the pressure rod, and the pressure rod is connected to the driving device, which can drive the pressure rod to move vertically.
[0006] Furthermore, it also includes an adjustment device, which includes a horizontal adjustment device and a vertical adjustment device. The horizontal adjustment device can adjust the horizontal position of the first pressure head or the second pressure head, and the vertical adjustment device can adjust the vertical relative position of the first pressure head and the second pressure head.
[0007] Furthermore, the lateral adjustment device includes a horizontal sleeve and bolts, the crossbeam is provided with several screw holes, the horizontal sleeve is provided with through holes, and the bolts cooperate with the screw holes and through holes to fix the first pressure head or the second pressure head on the crossbeam.
[0008] Furthermore, the vertical adjustment device includes a vertical sleeve, and a first pressure head or a second pressure head is threadedly connected to the vertical sleeve.
[0009] Furthermore, the first pressure head includes a pressure block, and a positioning hole is provided at the heel position of the shoe last. The pressure block cooperates with the positioning hole and acts on the bottom of the positioning hole during pressing.
[0010] Furthermore, the first pressure head acts on the forefoot portion of the shoe last, and a cushioning layer is provided on the inner side of the first pressure head in contact with the shoe upper. The cushioning layer includes an arc-shaped surface that matches the shape of the upper forefoot of the corresponding shoe last.
[0011] The first pressure head acts on the corresponding instep position of the shoe last. The instep position of the shoe last is provided with a rectangular positioning hole, and the first pressure head is provided with a pressure block that cooperates with the rectangular positioning hole.
[0012] Furthermore, the first pressure head includes a T-shaped connector, the upper end of which is threadedly connected to the vertical adjustment device, and the lower end wing plate of the T-shaped connector is detachably connected to the pressure block.
[0013] Furthermore, the groove is provided in the mold cavity, and a clamping component is provided on the side wall of the mold cavity. The clamping component achieves positioning by clamping the shoe placed in the groove.
[0014] The beneficial technical effects of this utility model are as follows:
[0015] This invention discloses a pressing structure for bonding shoe soles and uppers, comprising a first pressing head and a second pressing head. The first pressing head corresponds to the heel position of the shoe last (i.e., the traditional pressing position), and the second pressing head is positioned between the toe and heel of the shoe last. Existing pressing heads are positioned too far back, while this invention places another pressing head at the instep or forefoot position of the shoe last. This changes the traditional pressing process, which relies primarily on the downward pressure of the pressing head at the heel position to provide force. The pressure force applied to the front and rear of the shoe is more balanced, significantly reducing the pressure required to achieve a similar pressing effect. Simultaneously, it avoids indentations, fatigue deformation, and other issues at the heel position caused by excessive pressure.
[0016] In a specific embodiment of this invention, a buffer layer is provided on the inner side of the second pressure head and acts on the upper surface at the forefoot position. The buffer layer can prevent the second pressure head from directly acting on the upper surface. Furthermore, with the above structure, the pressure required for pressing is greatly reduced, and the upper surface is less likely to be damaged by the pressure head. In other embodiments, when processing shoes with a tongue, a positioning hole is provided at the instep position (tongue position) of the shoe last. The second pressure head cooperates with the positioning hole. During the pressing process, the tongue can be pulled upwards, and the second pressure head presses on the positioning hole, which can both balance the pressure and prevent the pressure head from directly pressing on the upper surface. Attached Figure Description
[0017] Figure 1 A front view of a specific embodiment of this utility model;
[0018] Figure 2 This is a side view;
[0019] Figure 3 This is a schematic diagram of one specific embodiment of the second pressure head;
[0020] Figure 4 This is a schematic diagram of the groove;
[0021] Figure 5 This is a schematic diagram of the positioning hole on the dorsum of the foot.
[0022] Explanation of reference numerals in the attached drawings: 1. First pressure head; 2. Second pressure head; 3. Groove; 4. Shoe last; 5. Crossbeam; 6. Pressure rod; 7. Guide rod; 8. Workbench surface; 9. Horizontal sleeve; 10. Bolt; 11. Vertical sleeve; 12. Pressure block; 13. Buffer layer; 14. Positioning hole; 15. T-shaped connector; 16. Airbag. Detailed Implementation
[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0024] Reference Figures 1 to 5 As shown, this utility model discloses a pressing structure for bonding shoe soles and uppers, including a pressing head. The pressing head applies pressure to a shoe last 4. A corresponding groove 3 is provided below the pressing head. The groove 3 is used to position the shoe to be pressed (the shoe upper and sole are joined together). The pressing head includes a first pressing head 1 and a second pressing head 2. The first pressing head 1 is applied to the heel position of the shoe last 4, and the second pressing head 2 is located between the toe and heel of the shoe last 4. Figure 1 and Figure 2The image shows a pressing machine. Existing pressing machines typically have two pressure heads capable of simultaneously pressing two pairs of shoes together. The pressure head drive structure is hydraulic, and it also includes a pressure gauge and control system to set the pressing pressure and control the pressing action. These existing technologies will not be elaborated upon here. This embodiment mainly improves the pressure heads on the basic structure of the pressing machine. Specifically: the first pressure head 1 and the second pressure head 2 are fixed to a crossbeam 5, which is fixed to a pressure rod 6. Slider blocks are installed at both ends of the crossbeam 5, and these sliders are movably connected to vertical guide rods 7. The pressure rod 6 is connected to a drive device, which is a hydraulic cylinder capable of driving the pressure rod 6 to move vertically and apply a set pressure. The hydraulic cylinder is fixed to the main beam of the pressing machine, which is fixed to the frame. A groove 3 is provided on the worktable 8, and the machine housing is located below the worktable 8. In this embodiment, the position of the first pressure head 1 corresponds to the heel position. The first pressure head 1 can be directly pressed onto the heel area of the shoe last 4 using existing pressure blocks. The second pressure head 2 can be pressed onto the forefoot area or the instep / tongue area of the shoe last 4. During the pressing process, the relative height difference between the first pressure head 1 and the second pressure head 2 causes both to simultaneously contact the last or the upper. Pressing plays a very important role in the upper-sole bonding process. The device in this embodiment allows the last to act more evenly on the sole and significantly reduces the pressure of the pressing machine, generally reducing it from 6-8 atmospheres to 1-2 atmospheres to achieve the desired adhesive bonding effect. From a shoemaking perspective, this even pressure can prevent excessive local pressure on the sole. This even pressing action can prevent excessive deformation of the sole, ensuring the aesthetics of the finished shoe's shape and proportions, resulting in a more aesthetically pleasing and functional shoe that is more readily accepted by the market.
[0025] In the above embodiments, reference is made to Figure 2 As shown, it also includes an adjustment device, which includes a horizontal adjustment device and a vertical adjustment device. The horizontal adjustment device includes a horizontal sleeve 9 and a bolt 10. The crossbeam 5 has several screw holes, and the horizontal sleeve 9 has through holes. The bolt 10 cooperates with the screw holes and through holes to fix the first pressure head 1 or the second pressure head 2 to the crossbeam 5. The horizontal adjustment device can adjust the horizontal position of the first pressure head 1 or the second pressure head 2. Since the distance between the through holes can be set according to the actual production needs during the mass production of shoes, generally speaking, the shoes produced are of standard size, so the distance between the through holes can be set to the spacing corresponding to the standard size or half size. The vertical adjustment device includes a vertical sleeve 11. The first pressure head 1 or the second pressure head 2 is fixed to the vertical sleeve 11 by a threaded connection. The vertical adjustment device can adjust the vertical relative position of the first pressure head 1 and the second pressure head 2, so that the height difference between them can allow the first pressure head 1 and the second pressure head 2 to apply force to the shoe last 4 simultaneously during the pressing process.
[0026] In the above embodiment, the first pressing head 1 includes a pressing block 12, and a positioning hole is provided at the heel position of the shoe last 4. The pressing block 12 cooperates with the positioning hole and acts on the bottom of the positioning hole during pressing.
[0027] In the above embodiments, reference is made to Figure 3 As shown, the first pressure head 1 acts on the forefoot portion of the shoe last 4. A cushioning layer 13 is provided on the inner side of the first pressure head 1 in contact with the upper. The cushioning layer 13 includes an arc-shaped surface that matches the shape of the upper forefoot portion of the corresponding shoe last 4. The cushioning layer 13 can be made of materials such as fabric or an air bladder, primarily to prevent damage to the upper under pressure. Another method is described below. Figure 5 As shown, the first pressing head 1 acts on the corresponding instep position of the shoe last 4. The instep position of the shoe last 4 is provided with a rectangular positioning hole 14. The first pressing head 1 is provided with a pressing block that cooperates with the rectangular positioning hole 14. This embodiment is generally applicable to shoes with a tongue. The positioning hole 14 of the shoe last 4 is generally circular or square, and the bottom surface of the positioning hole is set horizontally. In other processes of assembling the last and the shoe, a filling block can be placed in the positioning hole. The filling block is removed during pressing. A slightly protruding handle can be provided on the top of the filling block for easy removal. During pressing, the filling block is removed first, the tongue is flipped up, and the filling block is put back after pressing is completed. The reason for setting the positioning hole 14 on the instep is that the instep position is an arc surface, which is unstable under force. By setting the positioning hole 14, the pressing effect can be achieved more stably.
[0028] In the above embodiments, reference is made to Figure 3 As shown, for easy switching, the first pressure head 1 includes a T-shaped connector 15. The upper end of the T-shaped connector 15 is threadedly connected to the vertical adjustment device, and the lower end wing plate of the T-shaped connector 15 is detachably connected to the pressure block 12.
[0029] In the above embodiments, reference is made to Figure 4 As shown, a mold cavity is provided on the worktable 8 of the pressing machine, and a groove 3 is provided in the mold cavity. The mold cavity includes movable walls (such as by connecting moving rods, not shown in the figure), and the side walls and front and rear ends form a clamping assembly. When the shoe is put into the mold cavity, the side walls and front and rear ends move to restrict and position the shoe. An air bladder 16 can also be provided on the side wall. By inflating the air bladder 16, the shoe is clamped in the groove 3 to achieve better positioning.
Claims
1. A pressing structure for bonding shoe soles and uppers, comprising a pressing head, the pressing head applying a set pressure to a shoe last, characterized in that: A corresponding groove is provided below the press head, which is used to position the shoe to be pressed. The press head includes a first press head and a second press head. The first press head corresponds to the heel position of the shoe last, and the second press head is located between the toe and heel of the shoe last.
2. The pressing structure for bonding shoe soles and uppers according to claim 1, characterized in that: The first and second pressure heads are fixed on the crossbeam, the crossbeam is fixed on the pressure rod, and the pressure rod is connected to the driving device, which can drive the pressure rod to move vertically.
3. The pressing structure for bonding shoe soles and uppers according to claim 2, characterized in that: It also includes an adjustment device, which includes a horizontal adjustment device and a vertical adjustment device. The horizontal adjustment device can adjust the horizontal position of the first pressure head or the second pressure head, and the vertical adjustment device can adjust the vertical relative position of the first pressure head and the second pressure head.
4. The pressing structure for bonding shoe soles and uppers according to claim 3, characterized in that: The lateral adjustment device includes a horizontal sleeve and bolts. The crossbeam is provided with several screw holes, and the horizontal sleeve is provided with through holes. The bolts cooperate with the screw holes and through holes to fix the first pressure head or the second pressure head on the crossbeam.
5. The pressing structure for bonding shoe soles and uppers according to claim 4, characterized in that: The vertical adjustment device includes a vertical sleeve, and a first pressure head or a second pressure head is threadedly connected to the vertical sleeve.
6. A pressing structure for bonding soles and uppers according to any one of claims 2 to 5, characterized in that: The first pressure head includes a pressure block, and a positioning hole is provided at the heel position of the shoe last. The pressure block cooperates with the positioning hole and acts on the bottom of the positioning hole during pressing.
7. A pressing structure for bonding shoe soles and uppers according to claim 6, characterized in that: The first pressure head acts on the forefoot part of the shoe last. A cushioning layer is provided on the inner side of the first pressure head in contact with the shoe upper. The cushioning layer includes an arc-shaped surface that matches the shape of the upper forefoot part of the corresponding shoe last.
8. A pressing structure for bonding shoe soles and uppers according to claim 6, characterized in that: The first pressure head acts on the corresponding instep position of the shoe last. The instep position of the shoe last is provided with a rectangular positioning hole, and the first pressure head is provided with a pressure block that cooperates with the rectangular positioning hole.
9. A pressing structure for bonding shoe soles and uppers according to claim 7, characterized in that: The first pressure head includes a T-shaped connector, the upper end of which is threadedly connected to a vertical adjustment device, and the lower end wing plate of the T-shaped connector is detachably connected to the pressure block.
10. A pressing structure for bonding shoe soles and uppers according to claim 9, characterized in that: The groove is provided in the mold cavity, and the side wall of the mold cavity is provided with a clamping component. The clamping component achieves positioning by clamping the shoe placed in the groove.