Hot melt adhesive sheet cold and hot forming machine

Abstract

The utility model discloses a hot melt adhesive sheet cold and hot forming machine which comprises a rack, an upper conveying belt, a lower conveying belt, a driving mechanism, a thermocompression bonding device and a cooling device, the upper conveying belt and the lower conveying belt are used for clamping and conveying a hot melt adhesive sheet, the driving mechanism is used for driving the upper conveying belt and the lower conveying belt to move, and the thermocompression bonding device and the cooling device are sequentially arranged in the conveying direction. A lower pressing roller is arranged between the upper conveying rollers, the lower pressing roller is located above the upper conveying belt and presses the top of the upper conveying belt downwards to form a slope, and the lower pressing roller and the electric appliance part below the upper conveying belt are arranged in a front-back staggered mode. According to the hot-melt adhesive sheet cold and hot forming machine, the upper conveying belt is pressed down by a certain height through the lower pressing roller, so that the upper conveying belt forms a water collecting bend at the lower pressing roller, condensate water in front of and behind the water collecting bend flows to the water collecting bend along slopes in front of and behind the water collecting bend to be collected and drops from the lower portion of the water collecting bend, the dropping position of the condensate water is well controlled, and the water collecting bend is prevented from falling off. Condensed water drops are effectively prevented from dropping on electric equipment, so that faults caused by the condensed water drops are avoided, and the safety performance is improved.

Description

Technical Field

[0001] This utility model relates to a hot melt adhesive sheet cold and hot forming machine, and in particular to a hot melt adhesive sheet cold and hot forming machine for processing beveled edges on hot melt adhesive sheets, which can be used for processing leather goods such as shoes and bags. Background Technology

[0002] In the processing of leather goods such as shoes and bags, a type of hot melt adhesive sheet with thin, beveled edges is required to aid in the shaping of the shoes and bags. For example, hot melt adhesive sheets are used to help shape the forefoot and heel countertops in shoe manufacturing. Currently, the beveled edges of the hot melt adhesive sheets used in shoe manufacturing are mainly processed using a hot melt adhesive sheet thermoforming machine. After entering the machine, the hot melt adhesive sheet is first held and conveyed by upper and lower conveyor belts to a heating device for heating and melting. It is then compacted to thin the edges, forming the bevel. Next, it is conveyed by a conveyor belt to a freezing device to cool and shape the entire hot melt adhesive sheet. Finally, it is conveyed out from the outlet, completing the processing.

[0003] Throughout the processing, the hot melt adhesive sheet and the conveyor belts on both sides are cooled simultaneously. The conveyor belts, after cooling in the refrigeration unit, have a large surface area and their temperature is significantly lower than room temperature. During subsequent conveying, noticeable condensation occurs on the surface of the conveyor belt. This condensed water accumulates freely and randomly on the conveyor belt, eventually forming droplets that fall. For the upper conveyor belt, since electrical components of machinery are usually installed below it, the freely accumulating condensation on the conveyor belt may drip or splash onto the electrical equipment or components, posing a risk to equipment operation. This could easily cause equipment failure and create safety hazards. Utility Model Content

[0004] The present invention aims to overcome the defects of the prior art and provide a hot melt adhesive sheet cold and hot forming machine that can effectively prevent condensation from dripping onto electrical equipment, so as to avoid the malfunctions caused by it and improve its safety performance.

[0005] The hot melt adhesive sheet thermoforming machine of this utility model includes a frame, an upper conveyor belt and a lower conveyor belt for clamping and conveying hot melt adhesive sheets, a drive mechanism for driving the upper and lower conveyor belts, and a hot pressing device and a cooling device arranged sequentially along the conveying direction. Upper conveying rollers are provided at both ends of the upper side of the upper conveyor belt, and a lower pressure roller is provided between the upper conveying rollers. The lower pressure roller is located above the upper conveyor belt and presses down the top of the upper conveyor belt to form a slope. The lower pressure roller is staggered from the electrical part below the upper conveyor belt.

[0006] The hot melt adhesive sheet thermoforming machine of this utility model has a lower pressure roller installed on the upper side of the upper conveyor belt, offset from the electrical equipment. The lower pressure roller presses the upper conveyor belt down to a certain height, forming a water collection bend at the lower pressure roller. Slopes are formed before and after the water collection bend. The condensate in front of and behind the water collection bend flows along the slopes to the water collection bend and drips from below the water collection bend. This effectively controls the dripping position of the condensate, ensuring that it is offset from the electrical parts installed below the upper conveyor belt. This avoids malfunctions caused by the free and random accumulation of condensate dripping onto the electrical parts, ensuring the operation of the equipment and improving its safety performance. Attached Figure Description

[0007] Figure 1 This is an overall schematic diagram of the hot melt adhesive sheet thermoforming machine of this utility model;

[0008] Figure 2 for Figure 1 A schematic diagram of the structure after removing the side panels;

[0009] Figure 3 This is a schematic diagram of the structure of the lower pressure roller and the elastic mechanism;

[0010] Figure 4 This is another structural schematic diagram of the hot melt adhesive sheet thermoforming machine of this utility model;

[0011] Figure 5 This is another structural schematic diagram of the hot melt adhesive sheet thermoforming machine of this utility model.

[0012] In the diagram: 1-Frame; 2-Upper conveyor belt; 21a, 21b-Upper conveyor rollers; 22-Lower pressure roller; 23-Elastic mechanism; 24-Upper pressure roller; 3-Lower conveyor belt; 31-Discharge section; 32-Infeed section; 33-Lower side of the lower conveyor belt; 4-Drive mechanism; 5-Hot pressing device; 6-Cooling device; 7-Infeed port; 8-Discharge port; 9-Third conveyor belt; 91-Front discharge section; 10-Receiving box. Detailed Implementation

[0013] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0015] like Figure 1 , Figure 2 As shown, a hot melt adhesive sheet thermoforming machine includes a frame 1, an upper conveyor belt 2 and a lower conveyor belt 3 for holding and conveying hot melt adhesive sheets, a drive mechanism 4 for driving the upper and lower conveyor belts, and a hot pressing device 5 and a cooling device 6 arranged sequentially along the conveying direction. Upper conveying rollers 21a and 21b are provided at both ends of the upper side of the upper conveyor belt 2. A lower pressure roller 22 is arranged between the upper conveying rollers 21a and 21b. The lower pressure roller 22 is located above the upper conveyor belt 2 and presses down the top of the upper conveyor belt 2 to form a slope. The lower pressure roller 22 is staggered from the electrical components below the upper conveyor belt 2. This structure effectively controls the dripping position of condensate, ensuring it is staggered from the electrical components installed below the upper conveyor belt. This avoids malfunctions caused by the free and random accumulation of condensate dripping onto the electrical components, ensuring equipment operation and improving equipment safety.

[0016] During long-term use, the conveyor belt of a hot melt adhesive sheet thermoforming machine may experience belt deviation due to factors such as uneven stress on the belt surface and imbalance between the driving and driven rollers. This requires belt correction, typically achieved by adjusting the relative displacement of the two sides of the correction rollers using correction rollers. During this adjustment process, the conveyor belt needs to be stretched, usually by force. If the belt tension is too high, excessive force can cause belt breakage during the correction process. To avoid this problem, such as... Figure 2 , Figure 4 , Figure 5 As shown, the lower pressure roller 22 can be mounted on the frame 1 via an elastic mechanism 23. The mounting structure of the elastic mechanism 23 can be as follows: Figure 3 As shown, the structure is simple and the effect is stable. It can provide the pre-tension force of the lower pressure roller 22 to press down on the conveyor belt and maintain the tension of the conveyor belt. It can also provide buffering during the correction process to prevent hard pulling. This can avoid the belt from breaking due to excessive tension, ensure its normal operation and extend its service life.

[0017] An upper pressure roller 24 is also provided between the lower pressure roller 22 and the upper conveyor roller 21b at the upper front end of the upper conveyor belt 2, below the upper conveyor belt 2. The upper pressure roller 24 presses upward against the upper conveyor belt 2, such as... Figure 2 , Figure 4 , Figure 5 As shown. By setting an upper pressure roller 24 and squeezing the upper conveyor belt 2 upward between the lower pressure roller 22 and the upper conveyor roller 21b at the upper front end of the upper conveyor belt 2, the slope of the ramp between the lower pressure roller 22 and the upper pressure roller 24 is further increased. This helps the condensate on the conveyor belt to flow more quickly and smoothly towards the water collection bend and drip down, thereby further improving the control effect of the concentrated dripping position of the condensate.

[0018] Below the lower pressure roller 22, a water collection device, such as a water collection tank or water collection box, can be provided to collect condensate, so that it is directly aligned with the water collection bend above, making it easy to directly collect the condensate generated during the processing, so that it can be cleaned in a centralized manner, making the cleaning process simpler and more convenient.

[0019] A feeding section 32 is also provided in front of the upper conveyor belt 2 on the lower conveyor belt 3, such as... Figures 2 to 5 By designing the feeding section 32, hot melt adhesive sheets that have stuck to the lower conveyor belt 3 at the outlet can be visually identified and removed by the operator before re-entering the feeding port 7 between the upper and lower conveyor belts. This prevents the hot melt adhesive sheets from re-entering the equipment for processing through the feeding port 7, thus avoiding product defects. Furthermore, the feeding section 32 provides operating space for the operator, allowing for precise placement of materials such as hot melt adhesive sheets on the worktable. This helps avoid seams and defective areas on the conveyor belt, preventing the formation of protrusions or pits on the surface of the hot melt adhesive sheets and reducing waste.

[0020] The lower conveyor belt 3 is further provided with a discharge section 31 for continued feeding behind the upper conveyor belt 2, such as... Figure 2 , Figure 4 By setting the discharge section 31, after the upper conveyor belt 2 and the lower conveyor belt 3 are separated, the hot melt adhesive sheet can continue to be conveyed with the discharge section 31 of the lower conveyor belt 3.

[0021] The discharge port 8 can be located at the rear of the frame 1, at the rear of the discharge section 31 of the lower conveyor belt 3, such as... Figure 4 After the upper and lower conveyor belts are separated, the hot melt adhesive sheet formed on the lower conveyor belt 3 continues to be conveyed to the discharge port 8.

[0022] The discharge port 8 can also be located on the front side of the frame 1, such as... Figure 2A third conveyor belt 9 is installed below the lower conveyor belt 3. The third conveyor belt 9 cooperates with the rear part of the discharge section 31 of the lower conveyor belt 3 and the lower side 33 of the lower conveyor belt, together with the lower conveyor belt 3, to clamp and convey the hot melt adhesive sheet to the discharge port 8 at the front of the frame 1 and the front of the third conveyor belt 9. With the above structure, after separating from the upper conveyor belt 2, the formed hot melt adhesive sheet will enter between the third conveyor belt 9 and the lower conveyor belt 3, and continue to be clamped and conveyed by the third conveyor belt 9 and the lower conveyor belt 3 to the front of the frame 1, so that the discharge port 8 and the feed port 7 are located on the same side of the frame 1. This allows the discharge and feed operations to be completed by the same person, which can further reduce manual labor.

[0023] The front side of the frame 1 can be equipped with a receiving box 10 that connects with the discharge port 8 to receive the hot melt adhesive sheet sent out from the discharge port 8.

[0024] See Figure 2 The third conveyor belt 9 may be provided with a downward-sloping front discharge section 91 at the discharge port 8 to facilitate the export of hot melt adhesive sheets to the receiving box 10.

[0025] In addition, hot melt adhesive sheet thermoforming machines can also be used as... Figure 5 As shown, the lower conveyor belt 3 partially surrounds the upper conveyor belt 2 from the rear, closely fitting the upper, lower, and rear sides of the upper conveyor belt 2 to form a structure capable of clamping and conveying hot melt adhesive sheets. The lower conveyor belt 3 forms an outlet 8 and an inlet 7 at the upper and lower ends of the front side of the upper conveyor belt 2. By setting up this structure, the lower conveyor belt 3 can cooperate with the lower, rear, and upper sides of the upper conveyor belt 2, allowing the formed hot melt adhesive sheets to enter between the upper conveyor belt 2 and the lower conveyor belt 3. After being clamped and conveyed by the upper and lower conveyor belts 2 and 3, the sheets pass under the lower, rear, and upper sides of the upper conveyor belt 2 and arrive at the front side of the frame 1. Its outlet 8 and inlet 7 are respectively located at the upper and lower ends of the front side of the upper conveyor belt 2, without obstructing the view. A single operator can easily monitor and operate the discharge while feeding. If material sticking occurs during discharge, appropriate handling can be carried out quickly and easily, thereby avoiding potential malfunctions and product defects. Furthermore, since the lower conveyor belt 3 partially surrounds and closely adheres to the upper conveyor belt 2 from the upper, lower, and rear sides, forming a structure that can clamp and convey the hot melt adhesive sheet, the hot melt adhesive sheet can always be clamped between the upper conveyor belt 2 and the lower conveyor belt 3 after entering the conveyor belt from the feed port 7 until it is released from the conveyor belt from the discharge port 8. This ensures that the hot melt adhesive sheet receives a stable clamping effect during the process from the feed port 7 to the discharge port 8, making the transmission process stable, ensuring product quality, and eliminating the need to switch to different conveyor belts during the transmission process. The operator only needs to pay attention to the possible material adhesion near the feed port 7 and the discharge port 8 to facilitate quick and appropriate handling.

[0026] like Figure 5The frame 1 is equipped with a receiving box 10 below the discharge port 8. By setting the receiving box 10 to connect with the discharge port 8, it can catch materials such as hot melt adhesive sheets sent out from the discharge port 8.

[0027] In the above embodiments, the upper and lower conveyor belts are driven synchronously by the same drive mechanism 4, so that there is no relative movement between the conveyor belts. This can avoid the quality problems caused by the material that does not come into contact with the seam during the conveying process due to relative movement. It ensures that the material conveying process is never affected by the seam, thus avoiding the defects caused by it and improving the yield rate.

[0028] When processing hot melt adhesive sheets, the hot melt adhesive sheets are placed between the upper conveyor belt 2 and the lower conveyor belt 3 from the feed port 7 and are conveyed by the two conveyor belts; then the hot melt adhesive sheets are heated in the hot pressing device 5 to raise the temperature of the hot melt adhesive sheets to the hot pressing temperature and press the hot melt adhesive sheets in the hot melt state to form a sloping thin edge on the edge of the hot melt adhesive sheets; then the cooling device 6 is used to cool and shape the hot melt adhesive sheets as a whole, so that the hot melt adhesive sheets and the conveyor belts on both sides are cooled simultaneously and synchronously; finally, they are sent to the discharge port 8 by the conveyor belt.

[0029] The hot melt adhesive sheet hot and cold forming machine described above can not only perform hot melt adhesive sheet edge pressing and forming, but also stack hot melt adhesive sheets and leather materials on a conveyor belt for pressing operations. While realizing the beveled edge forming of the hot melt adhesive sheet, it can also directly complete the bonding operation of the hot melt adhesive sheet and leather materials, thereby directly omitting the subsequent shoe or bag making processes. It is a dual-purpose machine, saving processes and improving production efficiency.

[0030] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A hot melt adhesive sheet hot and cold forming machine, comprising a frame (1), an upper conveyor belt (2) and a lower conveyor belt (3) for clamping and conveying hot melt adhesive sheets, a drive mechanism (4) for driving the upper and lower conveyor belts, and a hot pressing device (5) and a cooling device arranged sequentially along the conveying direction, characterized in that, Upper conveyor belt (2) is provided with upper conveyor rollers (21a, 21b) at both ends of the upper side. A lower pressure roller (22) is provided between the upper conveyor rollers (21a, 21b). The lower pressure roller (22) is located above the upper conveyor belt (2) and presses down the top of the upper conveyor belt (2) to form a slope. The lower pressure roller (22) is staggered from the electrical part below the upper conveyor belt (2).

2. The hot melt adhesive sheet hot and cold forming machine according to claim 1, characterized in that, The lower pressure roller (22) is mounted on the frame (1) via an elastic mechanism (23).

3. The hot melt adhesive sheet thermoforming machine according to claim 1, characterized in that, An upper pressure roller (24) is provided between the lower pressure roller (22) and the upper conveyor roller (21b) at the upper front end of the upper conveyor belt (2), and below the upper conveyor belt (2). The upper pressure roller (24) presses upward against the upper conveyor belt (2).

4. The hot melt adhesive sheet hot and cold forming machine according to claim 1, characterized in that, A water collection device is provided below the lower pressure roller (22).

5. The hot melt adhesive sheet thermoforming machine according to any one of claims 1-4, characterized in that, The lower conveyor belt (3) is further provided with a feeding section (32) located in front of the upper conveyor belt (2).

6. The hot melt adhesive sheet thermoforming machine according to any one of claims 1-4, characterized in that, The lower conveyor belt (3) is further provided with a discharge section (31) for continued feeding behind the upper conveyor belt (2).

7. The hot melt adhesive sheet thermoforming machine according to claim 6, characterized in that, The discharge port (8) is located at the rear of the frame (1) and at the rear of the discharge section (31) of the lower conveyor belt (3).

8. The hot melt adhesive sheet thermoforming machine according to claim 6, characterized in that, A third conveyor belt (9) is provided below the lower conveyor belt (3). The third conveyor belt (9) cooperates with the rear part of the discharge section (31) of the lower conveyor belt (3) and the lower side (33) of the lower conveyor belt, and together with the lower conveyor belt (3), it clamps and conveys the hot melt adhesive sheet to the discharge port (8) at the front of the frame (1) and the front of the third conveyor belt (9).

9. The hot melt adhesive sheet thermoforming machine according to claim 8, characterized in that, The third conveyor belt (9) has a downward-sloping front discharge section (91) at the discharge port (8).

10. The hot melt adhesive sheet thermoforming machine according to any one of claims 1-4, characterized in that, The lower conveyor belt (3) partially surrounds the upper conveyor belt (2) from the rear, and closely fits the upper, lower and rear sides of the upper conveyor belt (2) to form a structure that can clamp and convey hot melt adhesive sheets. The lower conveyor belt (3) forms a discharge port (8) and a feed port (7) at the upper and lower ends of the front side of the upper conveyor belt (2).

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