A hot melt butt welding machine for PE sheet components

Abstract

This utility model belongs to the field of PE sheet hot-melt welding, and discloses a hot-melt butt welding machine for PE sheet components to solve the problem of the need for a simple and reliable hot-melt butt welding machine in the prior art. The hot-melt butt welding machine includes a chassis, a frame mounted on the top plate of the chassis, slide rails on both sides of the frame in the width direction, and a mold frame tray slidably mounted within the slide rails. An electric heating knife is mounted in the middle of the frame along the length direction, and the mold frame trays are symmetrically arranged on both sides of the electric heating knife. A mold plate is slidably mounted within each mold frame tray. A push-pull mechanism for sliding the mold frame tray and mold plate is mounted at the end of the mold frame tray. A PE partition is placed inside the mold plate, and a partition pressure rod is mounted on one side of the two mold plates facing each other. This utility model has a simple structure, is easy to operate, highly practical, low cost, accurate hot-melt butt welding dimensions, stable and reliable product quality, fast hot-melt welding speed, and high production efficiency, possessing good substitutability and promotional value.

Description

Technical Field

[0001] This utility model relates to the field of PE board hot melt welding, specifically to a PE board hot melt butt welding machine. Background Technology

[0002] Currently, many injection molding manufacturers, in order to reduce investment and costs, adopt a split-type, multi-stage molding process for injection molded parts with relatively large overall dimensions, followed by further processing. While a one-piece molding process offers high production efficiency, it requires large injection molding machinery and matching large molds to complete the production. The investment in large equipment and molds is enormous, making it unaffordable for ordinary small and medium-sized enterprises. Therefore, many companies choose to produce products by splitting the product into multiple injection molded parts and then hot-melting and assembling them.

[0003] The specific method involves disassembling the product into two or more parts along the axis of symmetry or other detachable components. Molds are then manufactured according to the product's disassembly, with a certain amount of heat-fusion allowance reserved on the split surfaces. Each disassembled part is injection molded individually and then butt-welded together to form a complete product. This method requires smaller injection molding equipment, especially for perfectly symmetrical products where the mold can be reduced by half, and the required injection molding equipment size can also be halved. A small hot-melt welding machine is then used for butt welding, significantly reducing initial equipment and mold investment.

[0004] Currently, there are many hot-melt butt welding machines for pipe fittings, such as the hot-melt butt welding machine for plastic pipes disclosed in CN202321701992.1 and the fully automatic hot-melt butt welding machine for plastic pipes disclosed in CN202322093991.X. However, there is still no simple and reliable hot-melt butt welding machine for sheet metal fittings. Therefore, there is a need to develop equipment for hot-melt butt welding of PE sheets to help solve the predicament of many small and medium-sized enterprises that cannot produce large-sized PE sheet products, and the market demand for this is significant. Utility Model Content

[0005] The purpose of this utility model is to solve the problems of large equipment and mold investment in the production of large-sized PE sheet products in existing technology enterprises, which require the disassembly of multiple parts for injection molding and then hot melt welding, and the need for a simple and reliable hot melt butt welding machine. This utility model provides a hot melt butt welding machine for PE sheet products.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A PE sheet butt welding machine includes a chassis, a frame mounted on the top plate of the chassis, slide rails on both sides of the frame in the width direction, a mold frame tray slidably mounted in the slide rails, an electric hot knife that can be raised or lowered mounted in the middle of the frame in the length direction, and mold frame trays symmetrically arranged on both sides of the electric hot knife, a mold plate slidably mounted in each mold frame tray, and the ends of the mold frame trays and the ends of the mold plates are connected by elastic elements, the ends of the mold frame trays are equipped with push-pull mechanisms for sliding the mold frame trays and mold plates, PE partitions are placed in the mold plates, and partition pressure rods are mounted on the opposite sides of the two mold plates, one end of the partition pressure rods being hinged to the mold plates.

[0008] Furthermore, the push-pull mechanism consists of push-pull cylinders installed on both sides of the frame along its length, with the piston end of the push-pull cylinder fixed to the mold frame tray.

[0009] Furthermore, the top of the electric heating knife is equipped with a knife holder, one end of which is hinged to a knife post that is inclinedly mounted on the side of the chassis. The chassis is also equipped with a lifting cylinder, the piston end of which is hinged to the knife holder.

[0010] Furthermore, a first limiting arc plate is provided at both ends of the mold plate near the partition pressure rod, and a second limiting arc plate is installed in the middle of the side of the mold plate near the push-pull cylinder.

[0011] Furthermore, each of the two mold plates has a semi-circular arc opening on its opposite side that is adapted to the PE partition plate, and the partition plate pressure rod also has a corresponding pressure rod arc opening.

[0012] Furthermore, the elastic element includes a guide rod, one end of which is fixedly connected to the mold plate, and the other end of which is movably connected to the mold frame tray, and a spring is fitted on the guide rod.

[0013] Furthermore, the chassis is also equipped with a cooling fan and a storage box.

[0014] Furthermore, the chassis is equipped with a control box for controlling the power supply, the heating of the electric hot knife, and the operation of the push-pull cylinder and the lifting cylinder.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] The mold plate of this invention is placed in a mold frame tray, and the mold frame tray and mold plate are elastically combined. The mold frame tray and mold plate move under the action of a push-pull cylinder, causing the two halves of the PE partition to be joined and pressed tightly together. With the help of the partition pressure rod, the surface of the PE partition is ensured to be flat and tightly against the heating plate during the hot melting and welding process. The mold frame tray supports the mold plate, allowing it to move left and right on the machine table, realizing the hot melting and neat joining process of the welded workpieces. The electric hot knife of this invention can be raised and lowered; when the partitions are joined and hot-melted, the electric hot knife descends; when welding is performed after the partitions have melted, the electric hot knife rises.

[0017] This utility model features a simple structure, ease of operation, strong practicality, low cost, and a certain degree of versatility. It achieves precise dimensional accuracy in hot-melt welding, ensuring stable and reliable product quality. The hot-melt welding speed is fast, resulting in high production efficiency and making it a valuable substitute for other products with significant potential for widespread adoption. It effectively solves the problem of high investment in large-scale equipment and molds required for integral one-piece molding of PE sheet components.

[0018] In addition, the mold plate of this utility model can be replaced according to the shape and size of different welded parts to determine the clamping position of the limiting arc plate.

[0019] The end of the mold frame tray and the end of the mold plate are connected by an elastic element, namely a guide rod and a spring. When the partition touches the heating plate or another hot melt partition, the position is limited. At this time, the mold frame tray compresses the spring to control the docking pressure and avoid physical collision. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a top view of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of the electric heating knife of this utility model when it is lifted.

[0023] Figure 4 This utility model Figure 3 Side view.

[0024] Figure 5 This is a schematic diagram of the present invention after the PE partition has been removed.

[0025] Figure 6 This utility model Figure 5 A schematic diagram of the electric hot knife and the partition pressure rod after they are lifted.

[0026] Figure 7 This utility model Figure 2 A magnified view of part A in the middle.

[0027] Figure 8 This is a schematic diagram of the control box of this utility model.

[0028] The meanings of the reference numerals in the attached diagram are as follows: 1. Chassis; 2. Frame; 3. Push-pull cylinder; 4. Mold frame tray; 5. Mold plate; 6. Elastic element; 7. Slide rail; 8. PE partition; 9. Hot knife; 10. Partition pressure rod; 11. Pressure rod arc; 12. Second limiting arc plate; 13. Cooling fan; 14. Control box; 15. Tool holder; 16. Guide rod; 17. Tool holder; 18. Lifting cylinder; 19. First limiting arc plate; 20. Semi-circular arc; 21. Spring. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1-7 As shown, a PE sheet hot melt butt welding machine includes a chassis 1, a frame 2 welded to the top plate of the chassis 1, slide rails 7 welded to both sides of the frame 2 in the width direction, a mold frame tray 4 slidably mounted in the slide rails 7, an electric hot knife 9 that can be raised or lowered is mounted in the middle of the frame 2 in the length direction, a knife holder 15 is mounted on the top of the electric hot knife 9, one end of the knife holder 15 is hinged to a knife holder 17 that is inclinedly mounted on the side of the chassis 1, and a lifting cylinder 18 is also fastened to the chassis 1, the piston end of the lifting cylinder 18 is hinged to the knife holder 15. The mold holder trays 4 are symmetrically arranged on both sides of the hot knife 9. Each mold holder tray 4 has a mold plate 5 slidably mounted inside it. The end of the mold holder tray 4 and the end of the mold plate 5 are connected by an elastic element 6. The elastic element 6 includes a guide rod 16. One end of the guide rod 16 is fixedly connected to the mold plate 5, and the other end of the guide rod 16 is movably connected to the mold holder tray 4 (to prevent the guide rod 16 from detaching from the mold holder tray 4, a pin can be inserted into the end of the guide rod 16 or a limit nut can be installed). A spring 21 is fitted on the guide rod 16.

[0031] The mold frame tray 4 is equipped with a push-pull mechanism at its end for sliding the mold frame tray 4 and the mold plate 5. The push-pull mechanism consists of push-pull cylinders 3 that are fastened to both sides of the frame 2 along its length, with the piston end of the push-pull cylinder 3 fixed to the mold frame tray 4. The mold plate 5 is used to place PE partitions 8. A partition pressure rod 10 is installed on one side of the two mold plates 5 facing each other, with one end of the partition pressure rod 10 hinged to the mold plate 5. First limiting arc plates 19 are fixedly installed at both ends of the mold plate 5 near the partition pressure rod 10, and a second limiting arc plate 12 is fixedly installed in the middle of the side of the mold plate 5 near the push-pull cylinder 3.

[0032] In this embodiment, a cooling fan 13 and a storage box 15 may also be installed on the chassis 1. The cooling fan 13 is used to dissipate the heat generated during hot melt welding.

[0033] In this embodiment, each of the two mold plates 5 has a semi-circular arc opening 20 on one side opposite to the PE partition plate 8, and a corresponding arc opening 11 is provided on the partition plate pressure rod 10. (To match the pipe holes on the PE partition plate 8 after hot-melt welding)

[0034] like Figure 8 In this embodiment, the chassis 1 is equipped with a control box 14 for controlling the power supply, the heating of the electric heating knife 9, and the operation of the push-pull cylinder 3 and the lifting cylinder 18. Specifically, the control box 14 is equipped with a main power switch, an emergency stop button, a heating on / off button for the electric heating knife 9, a clamping motion button for the push-pull cylinder 3, a retraction and release button, and an up / down button for the lifting cylinder 18 (the circuit connection and air circuit connection are not innovative points of this utility model, so they will not be described in detail).

[0035] When in operation, the electric hot knife 9 is in the lowered position:

[0036] 1. First, lift the partition rod 10, insert the PE partition 8 into the two mold plates 5, and then lower the partition rod 10 so that the partition rod 10 presses on the PE partition 8.

[0037] 2. Then press the clamping motion button of the push-pull cylinder 3. The push-pull cylinder 3 will move, causing the mold frame trays 4, mold plate 5 and PE partition 8 on both sides to move inward, pushing the PE partition 8 to contact the electric hot knife 9.

[0038] 1. Then press the heating power button on the electric hot knife 9. The electric hot knife 9 will start to heat up and melt the welding surface of the PE partition 8.

[0039] 2. Press the release button of the push-pull cylinder 3, and the push-pull cylinder 3 will drive the mold frame tray 4, mold plate 5 and PE partition 8 to move outward.

[0040] 3. Then press the heating off button of the electric heating knife 9, and press the rise button of the lifting cylinder 18. The lifting cylinder 18 will push the electric heating knife 9 and the knife holder 15 to lift upward.

[0041] Then press the clamping motion button of the push-pull cylinder 3. The push-pull cylinder 3 moves, causing the mold frame trays 4, mold plate 5 and PE partition 8 on both sides to move inward, so that the molten parts of the two PE partitions 8 are joined and melted into one.

Claims

1. A hot melt butt welding machine for PE plate parts, comprising a cabinet (1), a rack (2) is arranged on the top plate of the cabinet (1), characterized in that: The frame (2) is equipped with slide rails (7) on both sides in the width direction. A mold frame tray (4) is slidably installed in the slide rail (7). A hot knife (9) that can be raised or lowered is installed in the middle of the frame (2) along the length direction. The mold frame trays (4) are symmetrically arranged on both sides of the hot knife (9). A mold plate (5) is slidably installed in each mold frame tray (4). The end of the mold frame tray (4) and the end of the mold plate (5) are connected by an elastic element (6). The end of the mold frame tray (4) is equipped with a push-pull mechanism for sliding the mold frame tray (4) and the mold plate (5). The mold plate (5) is used to place a PE partition (8). A partition pressure rod (10) is installed on the opposite side of the two mold plates (5). One end of the partition pressure rod (10) is hinged to the mold plate (5).

2. The PE plate-like piece hot melt butt welding machine according to claim 1, characterized in that: The push-pull mechanism is a push-pull cylinder (3) installed on both sides of the frame (2) along the length direction, and the piston end of the push-pull cylinder (3) is fixed to the mold frame tray (4).

3. The PE plate-like piece hot melt butt welding machine according to claim 2, characterized in that: The top of the electric heating knife (9) is equipped with a knife holder (15), one end of which is hinged to a knife holder (17) that is inclinedly installed on the side of the machine box (1). The machine box (1) is also equipped with a lifting cylinder (18), the piston end of which is hinged to the knife holder (15).

4. The PE plate-like piece hot melt butt welding machine according to claim 3, characterized in that: The mold plate (5) is provided with a first limiting arc plate (19) at both ends near the partition pressure rod (10), and a second limiting arc plate (12) is installed in the middle of one side of the mold plate (5) near the push-pull cylinder (3).

5. The PE plate-like piece hot melt butt welding machine according to claim 4, characterized in that: Both mold plates (5) have a semi-circular arc opening (20) on one side opposite to the PE partition (8), and the partition pressure rod (10) also has a corresponding pressure rod arc opening (11).

6. The PE plate-like piece hot melt butt welding machine according to claim 1, characterized in that: The elastic element (6) includes a guide rod (16), one end of which is fixedly connected to the mold plate (5), and the other end of which is movably connected to the mold frame tray (4), and a spring (21) is fitted on the guide rod (16).

7. The PE plate butt welding machine according to any one of claims 1-6, characterized in that: The chassis (1) is also equipped with a cooling fan (13) and a storage box (15).

8. The PE plate-like piece hot melt butt welding machine according to claim 7, characterized in that: The chassis (1) is equipped with a control box (14) for controlling the power supply, heating of the electric hot knife (9), and the operation of the push-pull cylinder (3) and the lifting cylinder (18).

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