Hot melt adhesive sheet forming machine

Abstract

The utility model discloses a hot melt adhesive sheet forming machine which comprises a rack, an inner conveying belt and an outer conveying belt, the inner conveying belt is located in the middle of the rack, the outer conveying belt half surrounds the inner conveying belt and is tightly attached to the upper side, the lower side and the rear side of the inner conveying belt to form a structure capable of clamping and conveying a hot melt adhesive sheet, and the outer conveying belt forms a discharging port and a feeding port at the upper end and the lower end of the front side of the inner conveying belt. According to the hot melt adhesive sheet forming machine, the discharge port and the feed port are respectively formed in the upper end and the lower end of the front side of the inner conveying belt in the middle, so that sight blocking does not exist, a single operator can conveniently give consideration to discharge monitoring and operation during feeding operation, corresponding treatment can be conveniently and quickly carried out when discharged materials are adhered, and the production efficiency is improved. Therefore, hidden fault dangers and poor products are avoided.

Description

Technical Field

[0001] This utility model relates to leather processing equipment, and in particular to a hot melt adhesive sheet forming machine that processes beveled edges on the edges of 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 forming 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 pressed to thin the edges, forming the bevel. Next, it is conveyed by a conveyor belt to a cooling device to cool and shape the entire hot melt adhesive sheet. Finally, it is conveyed out from the outlet, completing the processing.

[0003] Chinese patent CN118386522A discloses a hot melt adhesive sheet forming machine, which is equipped with three conveyor belts, including an upper conveyor belt 11, a middle conveyor belt 12, and a lower conveyor belt 13, as shown below. Figure 1 As shown, after the material enters through the inlet 7, it is held and conveyed by the upper conveyor belt 11 and the middle conveyor belt 12 for hot melting and cooling processing. After hot and cold processing, the material is then held and conveyed back to the outlet 8 below the inlet by the lower conveyor belt 13 and the middle conveyor belt 12. The outlet 8 and the inlet 7 are both located on the same side of the machine, which facilitates single-person operation. However, during the processing, the processed hot melt adhesive film may occasionally stick to the lower conveyor belt 13. In this case, the operator needs to remove it manually. The outlet 8 is located below the inlet 7, which not only makes it easy to obstruct the view and not be able to be noticed in time, but also requires bending over to operate after it is discovered, which is time-consuming and inconvenient. If it is not removed in time, the stuck material may fall into the machine and cause safety hazards, or it may be reprocessed and produce waste. Furthermore, the material needs to be clamped and conveyed by different conveyor belts during the transmission process. The switching position is located at the rear of the frame. When switching conveyor belts, the material may stick together and fail to be transferred to other conveyor belts in time. It is also not easy for operators to notice and remove it in time. This may cause the material to fall into the machine without being recovered in time, posing a safety hazard, or to re-enter the machine for processing, resulting in defective products and affecting quality.

[0004] Furthermore, in the existing hot melt adhesive sheet molding machines, the upper and middle conveyor belts operate synchronously under the same drive mechanism, while the lower conveyor belt moves only due to the friction of the middle conveyor belt it contacts. During actual conveying, the lower and middle conveyor belts are prone to slippage due to poor contact, causing relative movement between them. The lower conveyor belt runs slower than the middle conveyor belt, preventing the material conveyed on the lower belt from reaching the discharge port in a timely manner. Over time, material tends to accumulate on the lower conveyor belt, affecting conveying efficiency and potentially leading to product defects due to material stacking and compression. While it's possible to ensure the lower conveyor belt operates synchronously with the upper and middle conveyor belts by increasing the precision of the motor and controller, thus avoiding speed differences, this inevitably raises the requirements for the motor and controller, increasing costs. Utility Model Content

[0005] The present invention aims to overcome the defects of the prior art and provide a hot melt adhesive sheet forming machine that is more convenient to operate and has a lower defect rate.

[0006] The hot melt adhesive sheet forming machine of this utility model includes a frame, an inner conveyor belt and an outer conveyor belt; the inner conveyor belt is located in the middle of the frame, and the outer conveyor belt partially surrounds the inner conveyor belt and is closely attached to the upper, lower and rear sides of the inner conveyor belt to form a structure that can clamp and convey hot melt adhesive sheets. The outer conveyor belt forms a discharge port and a feed port at the upper and lower ends in front of the inner conveyor belt.

[0007] The hot melt adhesive sheet forming machine of this utility model has its discharge port and feed port located at the upper and lower ends of the inner conveyor belt in the middle, respectively, ensuring unobstructed visibility. A single operator can easily monitor and operate the discharge process while feeding. If material sticking occurs during discharge, it can be quickly and easily addressed, thus avoiding potential malfunctions and product defects. Furthermore, because the outer conveyor belt partially surrounds and closely adheres to the inner conveyor belt from the upper, lower, and rear sides, forming a structure that can clamp and transport the hot melt adhesive sheet, the hot melt adhesive sheet is consistently held between the inner and outer conveyor belts after entering the conveyor belt from the feed port until it detaches from the conveyor belt at the discharge port. This ensures stable clamping of the hot melt adhesive sheet from the feed port to the discharge port, eliminating the need to switch to different conveyor belts during transport, further reducing product defects and ensuring quality. Attached Figure Description

[0008] Figure 1 A schematic diagram of the structure of an existing hot melt adhesive sheet forming machine after removing the side plates;

[0009] Figure 2 This is a schematic diagram of the hot melt adhesive sheet molding machine of this utility model after the side plates have been removed.

[0010] In the diagram: 1-Frame; 11-Upper conveyor belt; 12-Middle conveyor belt; 13-Lower conveyor belt; 2-Inner conveyor belt; 3-Outer conveyor belt; 32-Feeding platform; 4-Inner pressure roller; 5-Drive mechanism; 51-First sprocket; 52-Second sprocket; 53-Third sprocket; 54-Motor; 7-Feed inlet; 8-Discharge outlet; 81-Discharge section; 10-Receiving tray. Detailed Implementation

[0011] 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.

[0012] 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.

[0013] like Figure 2 As shown, the present invention discloses a hot melt adhesive sheet forming machine, including a frame 1, an inner conveyor belt 2 and an outer conveyor belt 3; the inner conveyor belt 2 is located in the middle of the frame 1, and the outer conveyor belt 3 partially surrounds the inner conveyor belt 2, and is closely attached to the upper, lower and rear sides of the inner conveyor belt 2 to form a structure that can clamp and convey hot melt adhesive sheets; the outer 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 inner conveyor belt 2.

[0014] In the hot melt adhesive sheet forming machine of this utility model, the hot melt adhesive sheet is placed between the inner conveyor belt 2 and the outer conveyor belt 3 from the feed port 7 and is conveyed by the two conveyor belts; then the hot melt adhesive sheet is heated in the hot pressing device to raise the temperature of the hot melt adhesive sheet to the hot pressing temperature and press the hot melt adhesive sheet in the hot melt state to form a sloping thin edge at the edge; then it passes through the cooling device to cool and shape the hot melt adhesive sheet as a whole, so that the hot melt adhesive sheet and the conveyor belts on both sides are cooled simultaneously and synchronously; then the hot melt adhesive sheet continues to be held by the inner and outer conveyor belts, passing the rear and upper side of the inner conveyor belt 2, and finally sent to the discharge port 8 to be received by the receiving tray 10. Because its discharge port 8 and feed port 7 are respectively located at the upper and lower ends of the front side of the inner conveyor belt 2 in the middle, there is no obstruction of vision. A single operator can easily monitor and operate the discharge while feeding. If material sticking occurs during discharge, it can be dealt with quickly and easily, thereby avoiding potential malfunctions and product defects. Furthermore, since the outer conveyor belt 3 partially surrounds the inner conveyor belt 2 from the upper, lower, and rear sides and fits it tightly, forming a structure that can clamp and transport hot melt adhesive sheets, the hot melt adhesive sheets can be clamped between the inner conveyor belt 2 and the outer conveyor belt 3 after entering the conveyor belt from the feed port 7 until they are released from the conveyor belt from the discharge port 8. This ensures that the hot melt adhesive sheets are stably clamped from the feed port 7 to the discharge port 8, keeping the transmission process stable. Moreover, there is no need to switch to different conveyor belts during transmission. The operator only needs to pay attention to the material sticking near the feed port 7 and the discharge port 8, so as to deal with it quickly and easily. Through the above structure, this utility model ingeniously solves the problems existing in the prior art, is easy to operate, reduces the defect rate caused by it, and ensures product quality.

[0015] The outer conveyor belt 3 extends forward relative to the inner conveyor belt 2 at the feed inlet 7 to form a feed platform 32, such as Figure 2 As shown. The feeding platform 32 provides operators with working space, allowing them to select the placement of materials such as hot melt adhesive sheets on the platform to easily avoid seams and defective areas on the conveyor belt. This prevents the hot melt adhesive sheets from forming protrusions or pits on the surface, reducing defects and waste. At the same time, it allows operators to visually identify and remove hot melt adhesive sheets that have not detached from the outer conveyor belt 3 at the discharge port 8 before they re-enter 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 caused by this.

[0016] The frame 1 is equipped with a receiving tray 10 below the discharge port 8, such as Figure 2 By setting the receiving tray 10 to connect with the discharge port 8, materials such as hot melt adhesive sheets sent out from the discharge port 8 can be caught.

[0017] like Figure 2 As shown, an inner pressure roller 4 can also be installed on the front side of the inner conveyor belt 2, located below the receiving tray 10, so that the front side of the inner conveyor belt 2 is inclined inward. The inwardly inclined conveyor belt can better prevent material from sticking together, and also allows the rear side of the receiving tray 10 located below the discharge port 8 to be installed closer to the discharge port 8 in the horizontal direction, thereby better preventing material from falling through the gaps and more reliably catching the material delivered from the discharge port 8.

[0018] Furthermore, the inner conveyor belt 2 can be equipped with a downward-sloping discharge section 81 at the discharge port 8, such as... Figure 2 By setting a downward slope, it is easier for materials such as hot melt adhesive sheets to be separated from the inner and outer conveyor belts and discharged into the receiving tray 10 more naturally.

[0019] The outer conveyor belt 3 and the inner conveyor belt 2 are driven synchronously by the same drive mechanism 5. The synchronous movement of the inner and outer conveyor belts prevents relative movement between them, thus avoiding quality problems caused by materials that do not come into contact with the seam during the conveying process due to relative movement. This ensures that the material conveying process is never affected by the seam, avoiding defects and improving the yield rate.

[0020] Specifically, such as Figure 2 As shown, the drive mechanism 5 includes a motor 54, a first sprocket 51 driven by the motor 54, a second sprocket 52 located on the drive roller of the inner conveyor belt 2, and a third sprocket 53 located on the drive roller of the outer conveyor belt 3. The first sprocket 51, the second sprocket 52, and the third sprocket 53 are driven by the same chain. Its structure is simple, its cost is low, and its design is reasonable, ensuring that the inner and outer conveyor belts maintain synchronous movement.

[0021] 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 forming machine, characterized in that, It includes a frame (1), an inner conveyor belt (2) and an outer conveyor belt (3); the inner conveyor belt (2) is located in the middle of the frame (1), and the outer conveyor belt (3) partially surrounds the inner conveyor belt (2), and is closely attached to the upper, lower and rear sides of the inner conveyor belt (2) to form a structure that can clamp and convey hot melt adhesive sheets. The outer 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 inner conveyor belt (2).

2. The hot melt adhesive sheet forming machine according to claim 1, characterized in that, The outer conveyor belt (3) extends forward relative to the inner conveyor belt (2) at the feed inlet (7) to form a feed platform (32).

3. The hot melt adhesive sheet forming machine according to claim 1, characterized in that, The frame (1) has a receiving tray (10) installed below the discharge port (8).

4. The hot melt adhesive sheet forming machine according to claim 3, characterized in that, An inner pressure roller (4) is provided on the front side of the inner conveyor belt (2) below the receiving tray (10), so that the front side of the inner conveyor belt (2) is tilted inward.

5. The hot melt adhesive sheet forming machine according to claim 1, characterized in that, The inner conveyor belt (2) has a downward-sloping discharge section (81) at the discharge port (8).

6. The hot melt adhesive sheet forming machine according to any one of claims 1-5, characterized in that, The outer conveyor belt (3) and the inner conveyor belt (2) are driven synchronously by the same drive mechanism (5).

7. The hot melt adhesive sheet forming machine according to claim 6, characterized in that, The drive mechanism (5) includes a motor (54), a first sprocket (51) driven by the motor (54), a second sprocket (52) located on the drive roller of the inner conveyor belt (2) and a third sprocket (53) located on the drive roller of the outer conveyor belt (3), wherein the first sprocket (51), the second sprocket (52) and the third sprocket (53) are driven by the same chain.

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