Double-layer plastic one-time extrusion molding device

Abstract

The utility model discloses a one-time extrusion molding device for double-layer plastic, which relates to the technical field of extrusion molding devices, and comprises a bottom plate, a motor bracket is arranged above one end of the bottom plate, a motor is arranged above the motor bracket, a belt transmission cover is arranged at the front end of the motor, and the belt transmission cover is arranged at the rear end of the bottom plate. Two extrusion sections are mounted at the front end of the belt transmission cover and are stacked up and down, electric heating jackets are mounted on the outer walls of the extrusion sections, discharging die heads are mounted at the front ends of the two extrusion sections, curve channels are mounted at the front ends of the discharging die heads, and the curve channels are communicated with the electric heating jackets. According to the scheme, the problems that after a base material manufactured through an existing device is subjected to extrusion forming, a color layer needs to be attached through the processes such as printing or paint spraying, texture needs to be increased on the surface layer through the UV transfer printing process, large equipment needs to be arranged in the technological process, investment is large, the procedures are complicated, and the yield and efficiency are low are solved.

Description

A double-layer plastic one-time extrusion molding device Technical Field

[0001] This utility model relates to the technical field of extrusion molding equipment, specifically a one-time extrusion molding equipment for double-layer plastics. Background Technology

[0002] Decorative panels for walls or floors are mainly composed of a base plate, a color layer, and a wear-resistant layer. The base plate is usually extruded using an extruder.

[0003] A traditional extruder, such as the one described in announcement number CN208615268U as a PVC sheet extrusion molding device for decorative panels, includes an extruder and a molding die. The molding die includes an upper feed port, a lower feed port, and a molding cavity; there are multiple upper and lower feed ports, all connected to the extruder's discharge port; the molding cavity has a slit-shaped extrusion port, and the cross-section of the molding cavity is U-shaped; multiple material buffer chambers are respectively formed on the top and bottom surfaces of the molding cavity; each material buffer chamber is bulging in shape, and each material buffer chamber is connected to one upper or lower feed port; the axial direction of the upper and lower feed ports faces the discharge direction of the extrusion port and forms an acute angle with the discharge direction of the extrusion port; electric heating devices are connected to the outside of the top and bottom surfaces of the molding cavity.

[0004] However, after the substrate produced by the above-mentioned device is extruded, it still needs to be coated with color layers through processes such as printing or painting. When the surface layer needs to be textured, it needs to be achieved through UV transfer printing. This process requires large equipment, involves large investment, and is complicated, resulting in low yield and efficiency. Therefore, we propose a double-layer plastic one-time extrusion molding device to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this utility model is to provide a double-layer plastic one-time extrusion molding device to solve the problem mentioned in the background art that after the substrate produced by the existing device is extruded, it still needs to be coated with color layer by printing or painting, and when the surface layer needs to be textured, it needs to be achieved by UV transfer printing process. This makes the process require large equipment, large investment, complicated procedures, and low yield and efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a double-layer plastic one-time extrusion molding device, comprising a base plate, a motor bracket mounted on the upper part of one end of the base plate, a motor mounted on the upper part of the motor bracket, a belt drive cover mounted on the front end of the motor, an extrusion section mounted on the front end of the belt drive cover, two extrusion sections being provided and stacked one on top of the other, an electric heating jacket mounted on the outer wall of the extrusion section, a discharge die head mounted on the front end of each of the two extrusion sections, a curved channel mounted on the front end of the discharge die head, the ends of the curved channels of the two discharge dies head being connected by a co-extrusion die head, and a calendering mechanism being provided on the front end of the co-extrusion die head.

[0007] Preferably, a main feed hopper is installed at the upper end of the extrusion section at the upper position, and a side feed hopper is provided on one side of the main feed hopper. The outer wall of the side feed hopper is connected to the extrusion section at the upper position through a support frame. A guide pipe is installed at the lower end of the side feed hopper, and the side feed hopper is connected to the extrusion section at the lower position through the guide pipe.

[0008] Preferably, the main feed hopper is used to add PMMA transparent plastic, and the side feed hopper is used to add ABS colored plastic.

[0009] Preferably, the output end of the motor extends through and into the interior of the belt drive cover and is equipped with a first pulley. A second pulley is provided at the lower end of the first pulley. The first pulley is connected to the second pulley via a belt. A driven shaft is installed inside the second pulley. The output end of the motor and the front end of the driven shaft extend into the interior of the two extrusion sections respectively and are equipped with a spiral push rod.

[0010] Preferably, the calendering mechanism includes a support frame, and two supports are provided. The two supports are connected by a bottom support plate, and the upper ends of the two supports are connected by a top plate. A U-shaped roller frame is provided below the top plate and above the bottom support plate. A pressure roller is installed inside the U-shaped roller frame. A cylinder is installed above the top plate and below the bottom support plate, and the output end of the cylinder is connected to the U-shaped roller frame for transmission.

[0011] Preferably, the U-shaped roller frame has slots inside at both ends, and the pressure roller has a roller shaft at both ends. One end of the roller shaft is rotatably connected to a connecting piece via a bearing. The connecting piece engages with the slots on the U-shaped roller frame, and the front and rear ends of the connecting piece are connected to the U-shaped roller frame via screws.

[0012] Preferably, the outer wall of the pressure roller has a calendered texture or a smooth surface.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This utility model adopts a dual-extrusion stage synchronous co-extrusion process. The two extrusion stages respectively extrude PMMA transparent plastic and ABS colored plastic. During processing, the two materials are first extruded through their respective discharge dies, and then flow along the curved channel to the co-extrusion die. After being compounded by the co-extrusion die, and then calendered by the upper and lower sets of pressure rollers, a semi-finished material with its own color is obtained. This solves the problem that the existing equipment requires the substrate to be extruded and then the color layer needs to be attached through printing or painting processes, which is a relatively complicated process.

[0015] (2) The surface of the pressure roller of this utility model can be set to a smooth surface or a special texture according to the requirements, so that the semi-finished product with fine texture and color on the surface can be processed in one go. After that, the required product can be obtained by CNC machining in the post-processing stage. The pressure roller is connected to the slot on the U-shaped roller frame by the connecting pieces at both ends, and then reinforced with screws. It is easy to disassemble and assemble, and easy to replace with the corresponding pressure roller. This solves the problem that if the surface of the substrate produced by the existing device needs to be textured, it needs to be achieved by UV transfer printing process, which requires large equipment and large investment in the process. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 is a schematic diagram of the rear structure of this utility model;

[0018] Figure 3 is a schematic diagram of the calendering mechanism of this utility model;

[0019] Figure 4 is a schematic diagram of the internal structure of the extrusion section of this utility model;

[0020] In the diagram: 1. Base plate; 2. Motor bracket; 3. Motor; 4. Belt drive cover; 401. First pulley; 402. Second pulley; 403. Belt; 5. Extrusion section; 6. Main feed hopper; 7. Side feed hopper; 8. Electric heating jacket; 9. Discharge die head; 10. Curved channel; 11. Co-extrusion die head; 12. Calendering mechanism; 121. Support; 122. Bottom support plate; 123. Top plate; 124. U-shaped roller frame; 125. Pressure roller; 126. Slot; 127. Connecting piece; 128. Screw; 129. Cylinder; 13. Support frame; 14. Guide tube; 15. Driven shaft; 16. Spiral pusher rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please refer to Figures 1-4. One embodiment of this utility model provides a double-layer plastic one-time extrusion molding device, including a base plate 1. A motor bracket 2 is installed above one end of the base plate 1. A motor 3 is installed above the motor bracket 2. A belt drive cover 4 is installed at the front end of the motor 3. An extrusion section 5 is installed at the front end of the belt drive cover 4. Two extrusion sections 5 are provided and stacked vertically. An electric heating jacket 8 is installed on the outer wall of the extrusion section 5. A discharge die head 9 is installed at the front end of each of the two extrusion sections 5. A curved channel 10 is installed at the front end of the discharge die head 9. The ends of the curved channels 10 of the two discharge dies 9 are connected by a co-extrusion die head 11. A calendering mechanism 12 is provided at the front end of the co-extrusion die head 11. A main feed hopper 6 is installed at the upper end of the upper extrusion section 5. A side feed hopper is provided on one side of the main feed hopper 6. The outer wall of the side feeding hopper 7 is connected to the extrusion section 5 above via a support frame 13. A guide pipe 14 is installed at the lower end of the side feeding hopper 7, and the side feeding hopper 7 is connected to the extrusion section 5 below via the guide pipe 14. The main feeding hopper 6 is used to add PMMA transparent plastic, and the side feeding hopper 7 is used to add ABS colored plastic. The output end of the motor 3 passes through and extends into the interior of the belt drive cover 4, and is equipped with a first pulley 401. A second pulley 402 is provided at the lower end of the first pulley 401. The first pulley 401 is connected to the second pulley 402 via a belt 403. A driven shaft 15 is installed inside the second pulley 402. The output end of the motor 3 and the front end of the driven shaft 15 extend into the interior of the two extrusion sections 5 respectively, and are equipped with a spiral push rod 16.

[0023] In use, PMMA transparent plastic and ABS colored plastic are added to the main feed hopper 6 and the side feed hopper 7 respectively. Then, the drive motor 3 runs. Under the action of belt pulley transmission, the motor 3 synchronously drives the spiral push rod 16 in the two extrusion sections 5 to run, and simultaneously pushes the two materials forward. During the process, the electric heating jacket 8 on the outer wall of the extrusion section 5 drives the materials to melt. The two materials are first extruded through their respective discharge dies 9, and then flow along the curved channel 10 to the co-extrusion die 11. After being compounded by the co-extrusion die 11, they are calendered by the upper and lower sets of pressure rollers 125 to obtain the semi-finished colored material.

[0024] Please refer to Figure 3. The calendering mechanism 12 includes two supports 121 connected by a bottom support plate 122. The upper ends of the two supports 121 are connected by a top plate 123. U-shaped roller frames 124 are provided below the top plate 123 and above the bottom support plate 122. Pressure rollers 125 are installed inside the U-shaped roller frames 124. Cylinders 129 are installed above the top plate 123 and below the bottom support plate 122, and the output end of the cylinders 129 is connected to the U-shaped roller frames 124 for transmission. The interior of both ends of the U-shaped roller frames 124 is provided with slots 126. Roller shafts are provided at both ends of the pressure rollers 125, and one end of the roller shaft is rotatably connected to a connecting rod via a bearing. The connecting piece 127 engages with the slot 126 on the U-shaped roller frame 124, and the front and rear ends of the connecting piece 127 are connected to the U-shaped roller frame 124 by screws 128. The outer wall of the pressure roller 125 has a calendered texture or a smooth surface. During calendering, the surface of the pressure roller 125 can be set to a smooth surface or a special texture as required, so that a semi-finished product with fine texture and color on the surface can be processed in one go. After that, only CNC machining in the post-processing stage is needed to obtain the required product. The pressure roller 125 is engaged with the slot 126 on the U-shaped roller frame 124 by the connecting pieces 127 at both ends, and then reinforced by screws 128. It is easy to disassemble and assemble, and easy to replace with the corresponding pressure roller 125.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A double-layer plastic one-time extrusion molding device, comprising a base plate (1), characterized in that: A motor bracket (2) is installed above one end of the base plate (1), and a motor (3) is installed above the motor bracket (2). A belt drive cover (4) is installed at the front end of the motor (3), and an extrusion section (5) is installed at the front end of the belt drive cover (4). There are two extrusion sections (5), which are stacked one on top of the other. An electric heating jacket (8) is installed on the outer wall of the extrusion section (5). A discharge die (9) is installed at the front end of each of the two extrusion sections (5). A curved channel (10) is installed at the front end of the discharge die (9). The ends of the curved channels (10) of the two discharge dies (9) are connected by a co-extrusion die (11). A calendering mechanism (12) is provided at the front end of the co-extrusion die (11).

2. The double-layer plastic one-time extrusion molding device according to claim 1, characterized in that: The upper end of the extrusion section (5) at the upper position is equipped with a main feed hopper (6), and a side feed hopper (7) is provided on one side of the main feed hopper (6). The outer wall of the side feed hopper (7) is connected to the extrusion section (5) at the upper position through a support frame (13). A guide pipe (14) is installed at the lower end of the side feed hopper (7), and the side feed hopper (7) is connected to the extrusion section (5) at the lower position through the guide pipe (14).

3. A double layer plastic disposable extrusion molding device as claimed in claim 2, wherein: The main feed hopper (6) is used to add PMMA transparent plastic, and the side feed hopper (7) is used to add ABS colored plastic.

4. The double-layer plastic one-time extrusion molding device according to claim 1, characterized in that: The output end of the motor (3) extends through and into the interior of the belt drive cover (4) and is equipped with a first pulley (401). A second pulley (402) is provided at the lower end of the first pulley (401). The first pulley (401) is connected to the second pulley (402) via a belt (403). A driven shaft (15) is installed inside the second pulley (402). The output end of the motor (3) and the front end of the driven shaft (15) extend into the interior of the two extrusion sections (5) respectively and are equipped with a spiral push rod (16).

5. The double-layer plastic one-time extrusion molding device according to claim 1, characterized in that: The calendering mechanism (12) includes a bracket (121), and two brackets (121) are provided. The two brackets (121) are connected by a bottom support plate (122). The upper ends of the two brackets (121) are connected by a top plate (123). A U-shaped roller frame (124) is provided below the top plate (123) and above the bottom support plate (122). A pressure roller (125) is installed inside the U-shaped roller frame (124). A cylinder (129) is installed above the top plate (123) and below the bottom support plate (122). The output end of the cylinder (129) is connected to the U-shaped roller frame (124) for transmission.

6. A double layer plastic disposable extrusion molding device as claimed in claim 5 wherein: The U-shaped roller frame (124) has slots (126) inside at both ends, and the pressure roller (125) has roller shafts at both ends. One end of the roller shaft is rotatably connected to a connecting piece (127) via a bearing. The connecting piece (127) engages with the slots (126) on the U-shaped roller frame (124), and the front and rear ends of the connecting piece (127) are connected to the U-shaped roller frame (124) via screws (128).

7. A double layer plastic disposable extrusion molding device as claimed in claim 6 wherein: The outer wall of the pressure roller (125) has a calendered texture or a smooth surface.

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