A PVC sheet rapid extrusion device

Abstract

The invention provides a PVC sheet rapid extrusion device, comprising a frame and a controller, wherein both ends of the frame are provided with an extrusion cylinder and an extrusion piston, the two extrusion pistons are connected through a connecting rod, and an adjusting screw and a rotating motor connected to each other are also provided on the frame, the adjusting screw is connected to the connecting rod through a sliding sleeve connected by a thread; a travel switch connected to the controller is also provided on the frame, a toggle rod matched with the travel switch is provided on the sliding sleeve, a feeding hopper is also connected to the piston cylinder, and a solenoid valve is provided on the feeding pipe; the invention realizes forward and reverse adjustment of the motor through the travel switch, and then drives the two extrusion pistons to realize reciprocating motion through the adjusting screw, when one extrusion piston extrude the material, the other extrusion cylinder performs the feeding operation, and ensures uninterrupted extrusion and discharging in the alternating operation, thereby improving the working efficiency of the extrusion device.

Description

Technical Field

[0001] The invention relates to the technical field of PVC sheet processing equipment, and in particular to a PVC sheet rapid extrusion device. Background Art

[0002] PVC board is a board with a honeycomb mesh structure made of PVC as raw material. It is a vacuum blister film. It is used for surface packaging of various panels, so it is also called decorative film and adhesive film. It is used in many industries such as building materials, packaging, and medicine. Among them, the building materials industry accounts for the largest proportion, which is 60%, followed by the packaging industry, and there are several other small-scale application industries. According to the degree of hardness, it can be divided into soft PVC and hard PVC, and according to the production process, it can be divided into PVC crust foam board and PVC free foam board;

[0003] In the prior art, the raw materials for the production of PVC sheets are generally solid PVC particles, which are heated and melted to become fluid. The fluid PVC material is extruded into a corresponding mold through an extrusion device for cooling and forming to obtain various PVC sheets. However, during the production process, the reciprocating extruder in the prior art cannot perform extrusion operations on its return journey, thereby greatly reducing the operating efficiency of the extruder. Summary of the invention

[0004] The present invention aims at the defect of low extrusion efficiency in the prior art and discloses a PVC sheet rapid extrusion device. The present invention can greatly improve the extrusion efficiency of the PVC sheet, thereby improving the production efficiency of the PVC sheet.

[0005] The present invention achieves the above object through the following technical solutions:

[0006] A PVC sheet rapid extrusion device comprises a frame and a controller, wherein extrusion cylinders are symmetrically arranged on both sides of the frame, extrusion pistons are slidably arranged in the extrusion cylinders, the two extrusion pistons are connected by a connecting rod, the end surface of the extrusion cylinder is provided with a plurality of discharge ports connected to a mold, and the top of the extrusion cylinder is connected to a feeding hopper through a feeding pipe; the frame is also provided with a rotating motor and an adjusting screw connected to each other, the rotating motor is connected to the controller, and the adjusting screw is threadedly connected to a sliding sleeve fixedly connected to the connecting rod; travel switches connected to the controller are arranged at both ends of the frame, and a toggle rod cooperating with the travel switch is arranged on the sliding sleeve; and the feeding pipe is also provided with an electromagnetic valve connected to the controller.

[0007] Preferably, an infrared rangefinder that cooperates with each other is arranged between the frame and the toggle rod, and the infrared rangefinder is connected to the controller.

[0008] Preferably, a sliding rod is also fixedly arranged on the frame, and the sliding sleeve is slidably connected to the sliding rod via a linear motion bearing.

[0009] Preferably, the frame and the connecting rod are slidably connected via a linear bearing seat.

[0010] Preferably, the outlet end of the extrusion cylinder is provided with a conical material guiding surface, and the front end of the extrusion piston is a cone adapted to the material guiding surface.

[0011] Preferably, the extrusion cylinder and the feeding tube are both wrapped with electric heating plates, and the electric heating plates are connected to the controller.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention comprises a frame and a controller, wherein both ends of the frame are provided with an extrusion cylinder and an extrusion piston, the two extrusion pistons are connected by a connecting rod, and an adjusting screw and a rotating motor connected to each other are also provided on the frame, the adjusting screw is connected to the connecting rod by a sliding sleeve connected by a thread; a travel switch connected to the controller is also provided on the frame, a toggle rod matched with the travel switch is provided on the sliding sleeve, a feeding hopper is also connected to the piston cylinder, and a solenoid valve is provided on the feeding pipe; the present invention realizes the forward and reverse adjustment of the motor through the travel switch, and then drives the two extrusion pistons to realize reciprocating motion through the adjusting screw, when one extrusion piston extrude the material, the other extrusion cylinder performs the feeding operation, and ensures uninterrupted extrusion and discharging in the alternating operation, thereby improving the working efficiency of the extrusion device, and the device of the present invention has a simple structure, which is conducive to improving the stability and reliability of the equipment operation.

[0014] 2. An infrared rangefinder is also provided between the frame and the toggle rod of the present invention. The infrared rangefinder is connected to the controller. The position of the piston cylinder is detected by the infrared rangefinder. On the one hand, the accuracy of equipment control is improved to ensure timely braking before a collision occurs; on the other hand, when the extrusion piston moves to a set interval, the motor is controlled to reduce the speed, thereby avoiding a hard collision between the extrusion piston and the extrusion cylinder and ensuring the service life of the equipment.

[0015] 3. The present invention also provides a sliding rod on the frame, and the sliding sleeve is slidably connected to the sliding rod through a linear motion bearing, so as to further limit the rotation of the connecting rod and reduce the force on the connecting end of the connecting rod and the extrusion piston. While improving the stability of the connecting rod, the connecting end of the connecting rod and the piston rod is protected to extend its service life; at the same time, it prevents the extrusion piston from shifting to one side of the extrusion cylinder under the action of the connecting rod, affecting the centering of the extrusion piston, and also reduces the wear on one side of the clamp extrusion cylinder.

[0016] 4. The frame and connecting rod of the present invention are slidably connected through a linear bearing seat, which provides vertical support for the connecting rod, ensures the centering of the extrusion piston, avoids its deviation to the lower side of the extrusion cylinder, and thus causes excessive wear on the lower end of the extrusion cylinder, thereby extending the service life of the equipment.

[0017] 5. The front ends of the extrusion cylinder and the extrusion piston of the present invention are adapted conical, which can extrude the materials at the transfer point quickly and conveniently compared with the cylindrical extrusion cylinder, thereby avoiding the accumulation of raw materials at the transfer point and improving the reliability and accuracy of the extruder extrusion.

[0018] 6. In the present invention, electric heating plates connected to the controller are arranged on the outer surfaces of the feeding pipe and the extrusion cylinder. On the one hand, the raw materials are preheated by the electric heating plates to keep the fluid PVC raw materials at a suitable extrusion temperature, thereby preventing them from cooling in the extrusion cylinder and affecting the fluidity and quality of the extruded products; on the other hand, solid PVC particles can be directly added as production raw materials, thereby expanding the use range of the equipment and reducing the requirements for peripheral equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a layout diagram of the bottom surface of the frame of the present invention;

[0021] Figure 3 A top view of the present invention;

[0022] Figure numerals: 1. frame, 2. controller, 3. extrusion cylinder, 4. extrusion piston, 5. connecting rod, 6. discharge port, 7. feeding pipe, 8. feeding hopper, 9. rotating motor, 10. adjusting screw, 11. sliding sleeve, 12. travel switch, 13. toggle rod, 14. solenoid valve, 15. infrared rangefinder, 16. sliding rod, 17. linear motion bearing, 18. linear bearing seat, 19. guide surface, 20. electric heating plate, 21. transmission gear. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The embodiments of the present invention include but are not limited to the following embodiments.

[0024] Implementation Method 1

[0025] This embodiment is a basic embodiment of the present invention, which discloses a PVC sheet rapid extrusion device, the specific structure is as follows Figure 1As shown, it includes a frame 1 and a controller 2, and extrusion cylinders 3 are symmetrically arranged on both sides of the frame 1. Extrusion pistons 4 are slidably arranged in the extrusion cylinders 3, and the two extrusion pistons 4 are fixedly connected by a connecting rod 5. At the same time, a rotating motor 9 is fixedly arranged on the bottom surface of the frame 1, and an adjusting screw 10 is rotatably arranged through a bearing seat, and the adjusting screw 10 is connected to the rotating motor 9 through a transmission gear 21; a sliding sleeve 11 is threadedly connected to the adjusting screw 10, and the upper end of the sliding sleeve 11 is connected to the connecting rod 5, so that the connecting rod 5 is arranged in a T shape; the rotating motor 9 is connected to the output end of the controller 2, and the controller 2 adopts PLC, and its input end is also connected to a travel switch 12, and there are two travel switches 12, which are respectively located on both sides of the frame 1, and toggle rods 13 are welded on both sides of the sliding sleeve 11, and the travel switch 12 is triggered by the toggle rod 13 to send relevant control signals.

[0026] The end faces of the two extrusion cylinders 3 are conical, and one end of the extrusion piston 4 is also set to a matching cone. The end face of the extrusion cylinder 3 is provided with a discharge port 6 connected to the mold, and the other end of the extrusion cylinder 3 is connected to a feeding hopper 8 through a feeding pipe 7. The bottom of the feeding pipe 7 is provided with a solenoid valve 14 connected to the output end of the controller 2.

[0027] Implementation Method 2

[0028] This embodiment is a preferred embodiment of the present invention, which discloses a PVC sheet rapid extrusion device, the specific structure is as follows Figure 2 As shown, it includes a frame 1, and extrusion cylinders 3 are symmetrically arranged on both sides of the frame 1. Extrusion pistons 4 are slidably arranged in the extrusion cylinders 3. The two extrusion pistons 4 are fixedly connected by a connecting rod 5. Linear bearing seats 18 are also arranged on both sides of the frame 1. The connecting rod 5 passes through the two linear bearing seats 18 to achieve sliding connection. At the same time, a sliding rod 16 parallel to the adjusting screw 10 is fixedly arranged on the bottom surface of the frame 1. A linear motion bearing 17 is arranged on the sliding rod 16, and the linear motion bearing 17 is fixedly connected to the sliding sleeve 11;

[0029] Furthermore, a set of infrared rangefinders 15 are respectively arranged between the two toggle rods 13 and the frame 1 , and a signal receiving end of the infrared rangefinder 15 is connected to a signal input end of the controller 2 .

[0030] Furthermore, the outer surfaces of the feeding pipe 7 and the extrusion cylinder 3 are wrapped with an electric heating plate 20 , and the electric heating plate 20 is connected to the output end of the controller 2 .

[0031] When the present invention is used, the PVC raw material enters the feeding pipe from the feeding hopper, and the material preheated to about 80°C in the feeding pipe finally enters the extrusion cylinder, and is then heated and melted into a fluid state in the extrusion cylinder. At this time, the extrusion piston compresses and pushes the fluid PVC raw material, and finally extrudes it all from the discharge port into the corresponding mold for molding. At this time, the toggle rod touches the travel switch, and the travel switch sends a control signal to the controller. The controller drives the motor to reverse, thereby driving the extrusion piston to retreat, and drives the extrusion piston at the other end to extrude the PVC material at that end. When the extrusion piston passes the position of the feeding pipe, the above process is repeated. The present invention drives the extrusion piston to reciprocate through the motor, and at the same time, by arranging two extrusion pistons, it is possible to fully utilize the return stroke in the reciprocating motion, thereby ensuring continuous and uninterrupted extrusion production and improving the working efficiency of the extrusion device.

Claims

1. A PVC sheet rapid extrusion device, comprising a frame (1) and a controller (2), wherein extrusion cylinders (3) are symmetrically arranged on both sides of the frame (1), extrusion pistons (4) are slidably arranged in the extrusion cylinders (3), the two extrusion pistons (4) are connected by a connecting rod (5), the end surface of the extrusion cylinder (3) is provided with a discharge port (6) connected to a mold, and the top of the extrusion cylinder (3) is connected to a feeding hopper (8) through a feeding pipe (7); the frame (1) is also provided with mutually connected The frame (1) is provided with a rotating motor (9) and an adjusting screw (10), the rotating motor (9) is connected to the controller (2), and the adjusting screw (10) is threadedly connected to a sliding sleeve (11) fixedly connected to the connecting rod (5); travel switches (12) connected to the controller (2) are provided at both ends of the frame (1), and a toggle rod (13) cooperating with the travel switch (12) is provided on the sliding sleeve (11); and a solenoid valve (14) connected to the controller (2) is also provided on the feeding pipe (7); An infrared rangefinder (15) that cooperates with each other is arranged between the frame (1) and the toggle rod (13), and the infrared rangefinder (15) is connected to the controller (2); A sliding rod (16) is also fixedly arranged on the frame (1), and the sliding sleeve (11) is slidably connected to the sliding rod (16) via a linear motion bearing (17).

2. A PVC sheet rapid extrusion device according to claim 1, characterized in that: The frame (1) and the connecting rod (5) are slidably connected via a linear bearing seat (18).

3. A PVC sheet rapid extrusion device according to claim 1, characterized in that: The outlet end of the extrusion cylinder (3) is provided with a conical material guiding surface (19), and the front end of the extrusion piston (4) is conical and matches the material guiding surface (19).

4. A PVC sheet rapid extrusion device according to claim 1, characterized in that: The extrusion cylinder (3) and the feeding pipe (7) are both wrapped with an electric heating plate (20), and the electric heating plate (20) is connected to the controller (2).

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