Hot melt adhesive twin-screw extrusion equipment

Abstract

The utility model relates to the technical field of hot melt adhesive processing, and discloses hot melt adhesive twin-screw extrusion equipment which comprises a rack, an extrusion mechanism connected to the rack, a pushing unit arranged on the extrusion mechanism, and an extrusion die head detachably connected to the pushing unit, a connecting frame capable of swinging is further arranged on the rack; the connecting frame can swing from one side of the extrusion mechanism to one end of the extrusion mechanism; when the connecting frame is located at the end of the extrusion mechanism, the pushing unit can push the extrusion die head to the connecting frame and enable the extrusion die head to be arranged on the connecting frame, and the connecting frame can drive the extrusion die head to swing to one side of the extrusion mechanism. According to the utility model, the pushing unit is arranged on the extrusion mechanism, when the connecting frame swings to the end part of the extrusion mechanism, the extrusion die head can be pushed to the connecting frame, is arranged on the connecting frame and swings to one side of the extrusion mechanism through the connecting frame, so that not only is the disassembly convenient, but also the production efficiency is improved. And moreover, a larger operation space is provided for maintaining and cleaning the extrusion die head, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot melt adhesive processing, and particularly relates to a hot melt adhesive twin-screw extrusion device. Background Art

[0002] The twin-screw extruder is an important industrial device and is widely used in the fields of plastics, rubber, food, medicine, and chemical engineering, etc. Its working principle depends on two mutually meshing screws, which push, mix, plasticize, react, etc. the materials through rotation and relative movement. Compared with the single-screw extruder, the twin-screw extruder has higher mixing efficiency and stronger shearing ability, and can process materials with high viscosity and complex formulations.

[0003] CN212826692U discloses a twin-screw plastic extruder, belonging to the field of plastic products. It includes a frame, on which a first barrel and a second barrel parallel to each other are fixedly arranged. The second barrel is arranged below the first barrel. A first screw is arranged in the first barrel. A first opening is arranged on the left side of the upper end of the first barrel, and a second opening is arranged on the right side of the lower end of the first barrel. A second screw is arranged in the second barrel. A third opening is arranged on the right side of the upper end of the second barrel corresponding to the second opening. The third opening is communicated with the second opening through a connecting barrel. The diameter of the connecting barrel is the same as the diameters of the first barrel and the second barrel. A die head is arranged at the left end of the second barrel. A U-shaped side plate is also arranged between the first barrel and the second barrel. The edge of the side plate is connected with the surfaces of the first barrel, the connecting barrel, and the second barrel to form a sealed cavity, and a heating device is arranged in the sealed cavity.

[0004] The space in the connecting barrel of the above technical solution is much larger than the space between two adjacent threads on the first screw in the first barrel. Therefore, the pressure of the material compressed by the first screw suddenly decreases after entering the connecting barrel. At this time, the bubbles existing in the melted material will burst, and the gas in the bubbles will overflow upward from the material with the bursting of the bubbles and accumulate above the connecting barrel. Therefore, the air in the material will be discharged cleanly, that is, there are no voids in the material flowing into and accumulating at the bottom of the connecting barrel. Furthermore, the product obtained by the second screw pushing the material away from the die head of the second barrel has no voids, which can effectively improve the quality of the product. However, the equipment needs to frequently maintain and clean the die head, and the die head of the above technical solution is very difficult to disassemble. Summary of the Utility Model

[0005] The object of the present utility model is to solve the above problems, and provides a hot melt adhesive twin-screw extrusion device. By arranging a pushing unit on the extrusion mechanism, when the connecting frame swings to the end of the extrusion mechanism, the extrusion die head can be pushed onto the connecting frame and placed on the connecting frame, and then the connecting frame swings to one side of the extrusion mechanism, which is not only convenient for disassembly, but also has a larger operation space for the maintenance and cleaning of the extrusion die head, improving production efficiency.

[0006] To achieve the above object, the present utility model adopts the following technical solutions:

[0007] A hot melt adhesive twin-screw extrusion device, comprising a frame, an extrusion mechanism connected to the frame, a pushing unit arranged on the extrusion mechanism, and an extrusion die head detachably connected to the pushing unit;

[0008] The pushing unit is used to keep the extrusion die head and the extrusion mechanism in a fitting state, or to push the extrusion die head to separate it from the extrusion mechanism;

[0009] The frame is also provided with a swingable connecting frame; the connecting frame can swing from one side of the extrusion mechanism to one end of the extrusion mechanism;

[0010] When the connecting frame is located at the end of the extrusion mechanism, the pushing unit can push the extrusion die head onto the connecting frame and place the extrusion die head on the connecting frame, and the connecting frame can drive the extrusion die head to swing to one side of the extrusion mechanism.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] By arranging a pushing unit on the extrusion mechanism, when the connecting frame swings to the end of the extrusion mechanism, the extrusion die head can be pushed onto the connecting frame and placed on the connecting frame, and then the connecting frame swings to one side of the extrusion mechanism, which is not only convenient for disassembly, but also has a larger operation space for the maintenance and cleaning of the extrusion die head, improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view of the hot melt adhesive twin-screw extrusion device of Embodiment 1;

[0014] Figure 2 is a front view of the hot melt adhesive twin-screw extrusion device of Embodiment 1;

[0015] Figure 3 is a top view of the hot melt adhesive twin-screw extrusion device of Embodiment 1;

[0016] Among them, the reference numerals of each figure are as follows:

[0017] Frame 1; Extrusion mechanism 2; Connecting frame 11; Extrusion die head 21; Pushing unit 22; Support rod 23; Limiting plate 24; Outer housing 25; Extrusion screw 26; Driving unit 27; Rotating shaft 111; Rod body 112; Connecting rod 113; Fixed seat 114; Positioning block 211; Positioning groove 212; Pushing cylinder 221; Block 2211. Detailed implementation mode

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0019] Embodiment 1

[0020] Reference Figures 1 to 3 A hot melt adhesive twin-screw extrusion device includes a frame 1 and an extrusion mechanism 2 connected to the frame 1. The extrusion mechanism 2 is provided with a pushing unit 22 and an extrusion die head 21 detachably connected to the pushing unit 22.

[0021] The pushing unit 22 is used to keep the extrusion die head 21 and the extrusion mechanism 2 in a fitting state, or to push the extrusion die head 21 to separate it from the extrusion mechanism 2.

[0022] The frame 1 is further provided with a swingable connecting frame 11; the connecting frame 11 can swing from one side of the extrusion mechanism 2 to one end of the extrusion mechanism 2.

[0023] When the connecting frame 11 is located at the end of the extrusion mechanism 2, the pushing unit 22 can push the extrusion die head 21 onto the connecting frame 11 and place the extrusion die head 21 on the connecting frame 11, and the connecting frame 11 can drive the extrusion die head 21 to swing to one side of the extrusion mechanism 2.

[0024] In this design, when it is necessary to disassemble the extrusion die head 21, swing the connecting frame 11 from one side of the extrusion mechanism 2 to one end of the extrusion mechanism 2. Under the action of the pushing unit 22, push the extrusion die head 21 onto the connecting frame 11 to separate the extrusion die head 21 from the extrusion mechanism 2 and place the extrusion die head 21 on the connecting frame 11. Then disassemble the connection between the extrusion die head 21 and the pushing unit 22, and swing the connecting frame 11 so that the connecting frame 11 is located on one side of the extrusion mechanism 2. At this time, the extrusion die head 21 is also located on one side of the extrusion mechanism 2. This not only facilitates disassembly, but also provides a larger operating space for the maintenance and cleaning of the extrusion die head 21, improving production efficiency. It avoids the formation of residues or cooling and solidification of the hot melt adhesive during long-term use, resulting in blockage and affecting flow.

[0025] During installation, the connecting frame 11 is swung to one end of the extrusion mechanism 2, and then the pushing unit 22 is connected to the extrusion die head 21, and the extrusion die head 21 is installed back to one end of the extrusion mechanism 2 through the pushing unit 22 to complete the installation.

[0026] Preferably, the extrusion mechanism 2 is provided with a plurality of horizontally arranged support rods 23, the extrusion die head 21 and the support rods 23 are slidably connected, and the connecting frame 11 is provided with connecting rods 113 corresponding one-to-one to the plurality of support rods 23; when the connecting frame 11 is located at the end of the extrusion mechanism 2, the connecting rods 113 and the support rods 23 are connected, and the pushing unit 22 can push the extrusion die head 21 from the support rods 23 to the connecting rods 113.

[0027] Specifically, the function of the support rod 23 is to ensure the smooth movement of the extrusion die 21. In the process of pushing the extrusion die 21, the extrusion die 21 is always in a supported state, and after the connecting rod 113 and the support rod 23 are connected, a continuous guiding effect can be formed. The pushing unit 22 can easily push the extrusion die 21 onto the connecting rod 113 to prevent the extrusion die 21 from falling.

[0028] Optionally, the support rods 23 are four and arranged in a rectangular structure. Of course, the support rods 23 can also be three or four or more, specifically according to the needs of actual processing, and the support rods 23 are not limited to the rectangular structure.

[0029] In this embodiment, the pushing unit 22 includes a pushing cylinder 221 connected to both sides of the extrusion mechanism 2 , and the power output ends of the pushing cylinder 221 located on both sides of the extrusion mechanism 2 are detachably connected to both sides of the extrusion die head 21 .

[0030] The cylinder has efficient power output and good working stability, and its structure is relatively simple and easy to maintain and repair. By connecting the two ends of the pushing cylinder 221 to the two sides of the extrusion die 21 respectively, it can ensure that both sides of the extrusion die 21 can be subjected to uniform and unidirectional forces, ensuring that the extrusion die 21 can be pushed out smoothly.

[0031] Furthermore, the cylinder body of the pushing cylinder 221 is rotatably connected to the side of the extrusion mechanism 2, and the side of the extrusion mechanism 2 is provided with a limit plate 24 for keeping the pushing cylinder 221 in a horizontal state. The pushing cylinder 221 can be swung upward to disengage its power output end from the extrusion die head 21.

[0032] In actual use, in the initial state, the pushing cylinder 221 is in a horizontal state. At this time, the power output end of the pushing cylinder 221 is connected to the extrusion die head 21. After the pushing cylinder 221 pushes out the extrusion die head 21, the operator can swing the power output end of the pushing cylinder 221 upwards to separate the power output end of the pushing cylinder 221 from the extrusion die head 21, enabling the complete separation of the extrusion die head 21 and the extrusion mechanism 2, which is convenient for maintenance.

[0033] Optionally, a pair of positioning blocks 211 are provided on both sides of the extrusion die head 21. A positioning groove 212 is provided between the pair of positioning blocks 211. A clamping block 2211 matching the positioning groove 212 is provided on the power output end of the pushing cylinder 221. The pushing cylinder 221 is detachably connected to the extrusion die head 21 through the clamping block 2211.

[0034] When the pushing cylinder 221 is in a horizontal state, the clamping block 2211 is located in the positioning groove 212. When the pushing cylinder 221 pushes the extrusion die head 21, the clamping block 2211 pushes or pulls the positioning block 211 in the positioning groove 212. During disassembly, by swinging the power output end of the pushing cylinder 221 upwards, the clamping block 2211 is separated from the positioning groove 212 to achieve disassembly, which is convenient for assembly and disassembly.

[0035] In this embodiment, the connecting frame 11 includes a fixed seat 114 connected to one side of the frame 1, a rotating shaft 111 rotatably connected to the fixed seat 114, rod bodies 112 connected side by side to the side of the rotating shaft 111, and connecting rods 113 evenly arranged on the rod bodies 112.

[0036] During operation, by pulling the rod body 112, the rod body 112 swings from one side of the extrusion mechanism 2 to one end of the extrusion mechanism 2, enabling the connecting rod 113 to be connected to the support rod 23. Moreover, this can reduce the weight of the connecting frame 11 and the number of parts, with better economy.

[0037] In this embodiment, the extrusion mechanism 2 includes a housing 25 connected to the frame 1, two extrusion screws 26 rotatably connected inside the housing 25, a driving unit 27 for driving the extrusion screws 26 to rotate. The driving unit 27 is connected to one end of the housing 25. The extrusion die head 21 is slidably connected to the other end of the housing 25. The pushing unit 22 is located on the housing 25. A feed hopper 251 is also provided on the housing 25.

[0038] During use, the operator feeds materials into the housing 25 through the feed hopper 251. The driving mechanism drives the two extrusion screws 26 to rotate in opposite directions, and the two extrusion screws 26 rotate at different speeds to push and mix the materials so that the materials are extruded from the extrusion die head 21. Regarding the structures of the various components, they have been publicly recorded in Chinese Patent CN216466084U. Therefore, the structures of the various components of the extrusion mechanism 2 will not be elaborated too much in this embodiment.

[0039] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements or modifications can be made, and these improvements or modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A hot melt adhesive twin-screw extrusion device, comprising a frame and an extrusion mechanism connected to the frame, characterized in that, The extrusion mechanism is provided with a pushing unit and an extrusion die head detachably connected to the pushing unit; The pushing unit is used to keep the extrusion die head and the extrusion mechanism in a fitting state, or to push the extrusion die head to separate it from the extrusion mechanism; The frame is further provided with a swingable connecting frame; the connecting frame can swing from one side of the extrusion mechanism to one end of the extrusion mechanism; When the connecting frame is located at the end of the extrusion mechanism, the pushing unit can push the extrusion die head onto the connecting frame and place the extrusion die head on the connecting frame, and the connecting frame can drive the extrusion die head to swing to one side of the extrusion mechanism.

2. The hot melt adhesive twin-screw extrusion equipment according to claim 1, characterized in that, The extrusion mechanism is provided with a plurality of horizontally arranged support rods, the extrusion die head is slidably connected to the support rods, and the connecting frame is provided with connecting rods corresponding to the plurality of support rods one by one; when the connecting frame is located at the end of the extrusion mechanism, the connecting rods are connected to the support rods, and the pushing unit can push the extrusion die head from the support rods onto the connecting rods.

3. The hot melt adhesive twin-screw extrusion equipment according to claim 2, wherein There are four support rods, and they are arranged in a rectangular structure.

4. The hot melt adhesive twin-screw extrusion equipment according to claim 1, characterized in that, The pushing unit includes pushing cylinders connected to both sides of the extrusion mechanism, and the power output ends of the pushing cylinders located on both sides of the extrusion mechanism are detachably connected to both sides of the extrusion die head respectively.

5. The hot melt adhesive twin-screw extrusion equipment according to claim 4, characterized in that, The cylinder body of the pushing cylinder is rotatably connected to the side of the extrusion mechanism, and the side of the extrusion mechanism is provided with a limiting plate for keeping the pushing cylinder in a horizontal state, and the pushing cylinder can swing upward to disengage its power output end from the extrusion die head.

6. The hot melt adhesive twin-screw extrusion equipment according to claim 5, characterized in that, A pair of positioning blocks are provided on both sides of the extrusion die head, and a positioning groove is provided between the pair of positioning blocks. A clamping block matching the positioning groove is provided on the power output end of the pushing cylinder, and the pushing cylinder is detachably connected to the extrusion die head through the clamping block.

7. The hot melt adhesive twin-screw extrusion equipment according to claim 3, characterized in that The connecting frame includes a fixed seat connected to one side of the frame, a rotating shaft rotatably connected to the fixed seat, and two rod bodies connected side by side to the side of the rotating shaft. The connecting rods are evenly arranged on the two rod bodies.

8. The hot melt adhesive twin-screw extrusion equipment according to claim 1, characterized in that, The extrusion mechanism includes a housing connected to the frame, two extrusion screws rotatably connected in the housing, and a driving unit for driving the extrusion screws to rotate. The driving unit is connected to one end of the housing, the extrusion die head is slidably connected to the other end of the housing, the pushing unit is located on the housing, and a feed hopper is further provided on the housing.

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