Extrusion device for film

Abstract

The utility model discloses extrusion equipment for a film. The extrusion equipment comprises an extrusion platform, a base, an extruder, an extrusion mold and a swing mechanism, wherein the base is movably arranged on the extrusion platform in the front-back direction, the extruder and the extrusion mold are arranged on the base, and the swing mechanism is in transmission connection between the base and the extrusion platform; the extrusion die is provided with an extrusion opening extending in the front-back direction, the swing mechanism comprises a lead screw nut connected with the base, a connecting base connected with the extrusion platform, a lead screw capable of rotating around the axis of the lead screw and arranged on the connecting base and a swing motor in transmission connection with the lead screw, the lead screw nut is in threaded connection with the lead screw, and the lead screw extends in the front-back direction. The lead screw nut is configured to drive the base to move back and forth along the lead screw when the lead screw rotates around the axis of the lead screw. According to the extruder and the extrusion die, the whole swing mechanism rapidly swings in the front-back direction in a short distance, so that the thickness of a thin film extruded from an extrusion opening is uniform, the rib explosion problem during thin film winding is reduced, and the yield is increased.

Description

Technical Field

[0001] The present application relates to the technical field of film production equipment, and in particular to an extrusion equipment for film. Background Art

[0002] The current film extrusion equipment has uneven melt distribution in the extrusion die and uneven melt discharge speed in the lateral direction, which makes the film extruded by the extrusion die uneven in thickness and easily produces ribs when winding, seriously affecting product quality, and easily generating a large amount of waste, increasing production costs and wasting resources. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present application is to provide an extrusion device for a film.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solution: an extrusion device for a film, comprising:

[0005] Extrusion platform;

[0006] A base, movably disposed on the extrusion platform in a front-rear direction;

[0007] An extruder, arranged on the base;

[0008] An extrusion die is fluidically connected to the discharge port of the extruder, the extrusion die is connected to the base through a suspension arm, the extrusion die has an extrusion port for extruding the product, and the extrusion port extends in the front-rear direction; and

[0009] A swing mechanism is transmission-connected between the base and the extrusion platform. The swing mechanism includes a screw nut connected to the base, a connecting seat connected to the extrusion platform, a screw rotatably arranged on the connecting seat around its own axis, and a swing motor transmission-connected to the screw. The screw nut is threadedly connected to the screw, and the screw extends in the front-rear direction. The screw nut is configured to drive the base to move back and forth along the screw when the screw rotates around its own axis.

[0010] In the above technical solution, it is further preferred that the swing mechanism also includes a pair of travel switches and a trigger member, the trigger member is installed at the bottom of the base, the pair of travel switches are installed on the extrusion platform, and are arranged sequentially along the front-to-back direction, the distance between the pair of travel switches is the distance that the base swings along the front-to-back direction, the pair of travel switches are connected to the swing motor signal, and each of the travel switches is configured to control the reversal of the swing motor when triggered by the trigger member.

[0011] In the above technical solution, it is further preferred that a moving component is also arranged between the base and the extrusion platform, and the moving component includes a plurality of moving wheels rotatably arranged at the bottom of the base and a guide rail arranged on the extrusion platform, the guide rail extends in the front-to-back direction, the axis line of each of the moving wheels extends in the left-to-right direction, and a groove cooperating with the guide rail is opened in the circumference of each of the moving wheels.

[0012] In the above technical solution, it is further preferred that the swing motor is electrically connected to a frequency converter, and the frequency converter is used to adjust the swing speed of the swing motor, and the adjustment range of the swing speed is 0-50 mm / s.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The extruder and the extrusion die of the present application are swung quickly and in a short distance along the front-rear direction as a whole through a swing mechanism, so that the thickness of the film extruded from the extrusion port is uniform, the problem of cracking when the film is rolled up is reduced, and the yield rate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A front view of an extrusion device provided in an embodiment of the present application;

[0016] Figure 2 for Figure 1 A side view of an extrusion device;

[0017] Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure of the swing mechanism.

[0018] Among them: 100, extrusion equipment; 1, extrusion platform; 2, base; 3, extruder; 4, extrusion mold; 5, swing mechanism; 51, connecting seat; 52, fork; 520, slot; 53, screw nut; 54, screw; 55, swing motor; 56, support seat; 6, boom; 7, moving assembly; 71, moving wheel; 72, guide rail. DETAILED DESCRIPTION

[0019] To describe the technical content, structural features, achieved purpose and effect of the application in detail, the technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0020] The terms “upper”, “lower”, “front” and “back” in this application are as specified in the attached Figure 1 Top, bottom, front and back shown.

[0021] In the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0022] The present application embodiment provides an extrusion device for a thin film, such as Figure 1 As shown, the extrusion equipment 100 includes: an extrusion platform 1, a base 2 arranged on the extrusion platform 1, an extruder 3 and an extrusion die 4 arranged on the base 2, and a swing mechanism 5 transmission-connected between the base 2 and the extrusion platform 1.

[0023] The extrusion platform 1 is supported on the ground, and the base 2 is movably disposed on the extrusion platform 1 along the front-rear direction.

[0024] like Figure 1 , 2 As shown, the extruder 3 is used to fully plasticize and melt the material. The discharge port of the extruder 3 is connected to the extrusion flow channel fluid of the extrusion die 4. The extrusion die 4 has an extrusion port connected to the extrusion flow channel. The extrusion port extrude the melt output by the extruder 3 in the form of a film. In the embodiment of the present application, the extrusion port extends in the front-to-back direction; the extrusion die 4 is connected to the base 2 through a suspension arm 6. When the base 2 moves in the front-to-back direction, the extruder 3 and the extrusion die 4 move along the front-to-back direction relative to the extrusion platform 1 with the base 2.

[0025] A moving assembly 7 is also provided between the base 2 and the extrusion platform 1. The moving assembly 7 includes a plurality of moving wheels 71 rotatably provided at the bottom of the base 2 and a guide rail 72 provided on the extrusion platform 1. The guide rail 72 extends in the front-to-back direction, and the axis line of each moving wheel 71 extends in the left-to-right direction. A groove cooperating with the guide rail 72 is provided in the circumference of each moving wheel 71.

[0026] like Figure 2 , 3 As shown, the swing mechanism 5 includes a connection seat 51, a shift fork 52, a screw nut 53, a screw 54 and a swing motor 55. The connection seat 51 is fixedly mounted on the top of the extrusion platform 1, and the shift fork 52 is fixedly mounted on the bottom of the base 2. The bottom of the shift fork 52 is provided with a slot 520 for the screw nut 53 to be installed. The screw nut 53 is clamped in the slot 520. The shift fork 52 allows the screw nut 53 to be suspended on the upper side of the connection seat 51 so as to be able to move in the front-to-back direction relative to the connection seat 51. The screw 54 is rotatably arranged on the connection seat 51 around its own axis through a pair of support seats 56. The screw 54 extends in the front-to-back direction and is inserted into the screw nut 53. The screw nut 53 is threadedly connected to the screw 54 so as to move back and forth along the screw 54 when the screw 54 rotates around its own axis. The swing motor 55 is mounted on the connection base 51 and is in transmission connection with the screw rod 54 to drive the screw rod 54 to rotate around its own axis. The swing motor 55 has a brake and can rotate forward and reverse to drive the screw rod 54 to rotate forward and reverse around its own axis. When the swing motor 55 drives the screw rod 54 to rotate, the screw rod nut 53 drives the base 2 to move back and forth along the screw rod 54.

[0027] In other embodiments, the extrusion port extends in the left-right direction, and the swing mechanism 5 drives the base 2 carrying the extrusion die 4 and the extruder 3 to swing in the left-right direction, and the swing direction of the base 2 is parallel to the extension direction of the extrusion port.

[0028] The swing mechanism 5 also includes a pair of travel switches (not shown in the figure) and a trigger (not shown in the figure). The trigger is installed at the bottom of the base 2 and can trigger the pair of travel switches. The pair of travel switches are installed on the extrusion platform 1 and arranged in sequence along the front-to-back direction. The distance between the pair of travel switches is the distance of the base 2 swinging along the front-to-back direction. The pair of travel switches are connected to the swing motor 55 by signal. When each travel switch is triggered by the trigger, the swing motor 55 is controlled to reverse. The installation of the travel switch helps to control the swing stroke of the base 2.

[0029] The extrusion speed of the extrusion die 4 is proportional to the swing speed of the base 2. The faster the extrusion speed, the faster the swing speed, thereby ensuring uniform thickness of the extruded product. The swing motor 55 is electrically connected to a frequency converter (not shown in the figure). The frequency converter adjusts the current delivered to the swing motor 55 to adjust the swing speed of the swing motor 55, so that the swing speed of the swing motor 55 matches the extrusion speed. The frequency converter adjusts the swing speed in a range of 0-50 mm / s.

[0030] The extruder 3 and the extrusion die 4 mounted on the base 2 are swung quickly and in a short distance along the front-rear direction as a whole through the swing mechanism 5, so that the thickness of the film extruded from the extrusion port is uniform, the problem of cracking when the film is rolled up is reduced, and the yield rate is improved.

[0031] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, and the scope of protection required by the present application is defined by the attached claims, description and their equivalents.

Claims

1. An extrusion device for a film, characterized in that: include: Extrusion platform; A base, movably disposed on the extrusion platform in a front-rear direction; An extruder, arranged on the base; An extrusion die is fluidically connected to the discharge port of the extruder, the extrusion die is connected to the base through a suspension arm, and the extrusion die has an extrusion port for extruding the product, and the extrusion port extends in the front-rear direction; as well as A swing mechanism is transmission-connected between the base and the extrusion platform. The swing mechanism includes a screw nut connected to the base, a connecting seat connected to the extrusion platform, a screw rotatably arranged on the connecting seat around its own axis, and a swing motor transmission-connected to the screw. The screw nut is threadedly connected to the screw, and the screw extends in the front-rear direction. The screw nut is configured to drive the base to move back and forth along the screw when the screw rotates around its own axis.

2. The extrusion device according to claim 1, characterized in that The swing mechanism also includes a pair of travel switches and a trigger member, the trigger member is installed at the bottom of the base, the pair of travel switches are installed on the extrusion platform, and are arranged in sequence along the front-to-back direction, the distance between the pair of travel switches is the distance that the base swings along the front-to-back direction, the pair of travel switches are connected to the swing motor signal, and each of the travel switches is configured to control the swing motor to reverse when triggered by the trigger member.

3. The extrusion device according to claim 1, characterized in that A moving assembly is also arranged between the base and the extrusion platform, and the moving assembly includes a plurality of moving wheels rotatably arranged at the bottom of the base and a guide rail arranged on the extrusion platform, the guide rail extends in the front-to-back direction, the axis line of each of the moving wheels extends in the left-to-right direction, and a groove cooperating with the guide rail is opened in the circumference of each of the moving wheels.

4. The extrusion device according to claim 1, characterized in that The swing motor is electrically connected to a frequency converter, and the frequency converter is used to adjust the swing speed of the swing motor. The adjustment range of the swing speed is 0-50 mm / s.

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