A device for realizing automatic amplitude adjustment of a film stretching machine in transverse and longitudinal directions

Abstract

The application discloses a device for realizing automatic amplitude adjustment in the transverse direction and the longitudinal direction of a film stretching machine, and belongs to the technical field of film stretching. The device comprises a motor, a support, a spline shaft sleeve, a spline shaft, a commutator, a telescopic universal coupling, a longitudinal amplitude adjustment slide rail, a base, an extended shaft, a guide rail and a servo motor. The device can automatically adjust the amplitude in the transverse direction and the longitudinal direction of the film stretching machine, better matches the process requirement, and has the advantages of simple structure, convenient installation and cost saving.

Description

Technical Field

[0001] This invention belongs to the field of film stretching technology and relates to a device for realizing automatic horizontal and vertical amplitude adjustment of a film stretching machine. Background Technology

[0002] Film stretching machines are essential components in film production. Through the stretching process, they produce films of the required quality. There are three stretching methods: longitudinal stretching, longitudinal-transverse asynchronous stretching, and synchronous stretching. Currently, adjusting the longitudinal and transverse stretching ratios in film stretching machines requires manually adjusting the stretching ratio by stopping the machine and cooling the oven; automatic adjustment of the stretching ratio according to process requirements is not possible. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a device for automatically adjusting the transverse and longitudinal amplitudes of a film stretching machine.

[0004] The technical solution of this invention is as follows:

[0005] A device for automatically adjusting the transverse and longitudinal amplitude of a film stretching machine includes a motor 1, a bracket 2, a splined bushing 3, a splined shaft 4, a commutator A5, a telescopic universal joint 6, a longitudinal amplitude adjustment slide rail 7, a base A8, a base B9, an extension shaft 10, a guide rail 11, a servo motor 12, and a commutator B13.

[0006] The servo motor 12 is fixed on the bracket 2. One end of the extended shaft 10 is connected to the servo motor 12, and the other end is connected to the ball screw in the guide rail 11 through a coupling. The ball screw in the guide rail 11 is a positive and negative ball screw, and nuts are connected to the positive and negative ball screws respectively. The two nuts are connected to the base A8 and the base B9 respectively. When the servo motor 12 rotates, the positive and negative ball screws rotate, thereby driving the base A8 and the base B9 to move in opposite directions. The distance between the base A8 and the base B9 increases or decreases, thereby increasing or decreasing the distance between the track clamps on the base A8 and the base B9 used to hold the film, thus realizing automatic adjustment of the transverse stretch ratio.

[0007] Both base A8 and base B9 are equipped with longitudinal amplitude adjustment slide rails 7. The longitudinal amplitude adjustment slide rail 7 includes a ball screw nut assembly and articulated arms. The two articulated arms are connected to the ball screw by nuts.

[0008] There are two motors 1, which are fixed on the two side brackets 2 respectively. Each motor 1 is connected to a splined bushing 3. The splined bushing 3 is connected to one end of the splined shaft 4, and the other end of the splined shaft 4 is connected to the commutator B13. The commutator B13, the telescopic universal joint 6 and the commutator A5 are connected in sequence. The commutator A5 is also connected to the ball screw in the longitudinal amplitude adjustment slide rail 7. The distance between the two joint arms is adjusted by driving the ball screw through the motor 1, thereby adjusting the distance between the clamps on the joint arms and realizing automatic adjustment of the longitudinal tension ratio.

[0009] When adjusting the lateral pull ratio, base A8 and base B9 move on guide rail 11, and spline shaft 4 is inserted into spline bushing 3, thereby achieving redundant movement distance of spline bushing 3 and spline shaft 4 on base A8 and base B9.

[0010] The beneficial effects of this invention are: 1) It enables automatic amplitude adjustment in both the horizontal and vertical directions of the film stretching machine, better matching process requirements; 2) It has a simple structure, is easy to install, and saves costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the device described in this invention.

[0012] In the diagram: 1 Motor; 2 Bracket; 3 Splined bushing; 4 Splined shaft; 5 Commutator A; 6 Telescopic universal coupling; 7 Longitudinal amplitude adjustment slide rail; 8 Base A; 9 Base B; 10 Extended shaft; 11 Guide rail; 12 Servo motor; 13 Commutator B. Detailed Implementation

[0013] The following description, in conjunction with the embodiments and accompanying drawings, further explains the specific implementation of the present invention, but is not intended to limit the present invention.

[0014] like Figure 1 The device shown is for automatically adjusting the transverse and longitudinal amplitude of a film stretching machine, including a motor 1, a bracket 2, a splined bushing 3, a splined shaft 4, a commutator A5, a telescopic universal joint 6, a longitudinal amplitude adjustment slide rail 7, a base A8, a base B9, an extension shaft 10, a guide rail 11, a servo motor 12, and a commutator B13.

[0015] The guide rail 11 includes a ball screw and a nut. The ball screw is a reversible ball screw, and a nut is connected to each of the reversible ball screws. The two nuts are respectively connected to the base A8 and the base B9. Both the base A8 and the base B9 are equipped with a longitudinal amplitude adjustment slide rail 7. The longitudinal amplitude adjustment slide rail 7 includes a ball screw nut assembly and a joint arm. The two joint arms are connected to the ball screw through nuts.

[0016] The servo motor 12 is fixed on the bracket 2. One end of the extended shaft 10 is connected to the servo motor 12, and the other end is connected to the ball screw in the guide rail 11 through a coupling. When the servo motor 12 rotates, it drives the base A8 and base B9 to move in opposite directions through the rotation of the forward and reverse ball screws. The distance between the base A8 and base B9 increases or decreases, thereby increasing or decreasing the distance between the track clamps on the base A8 and base B9, thus realizing automatic adjustment of the lateral stretching ratio.

[0017] There are two motors 1, which are fixed on the two side brackets 2 respectively. Each motor 1 is connected to a splined bushing 3. The splined bushing 3 is connected to one end of the splined shaft 4, and the other end of the splined shaft 4 is connected to the commutator B13. The commutator B13, the telescopic universal joint 6 and the commutator A5 are connected in sequence. The commutator A5 is also connected to the ball screw in the longitudinal amplitude adjustment slide rail 7. The distance between the two joint arms is adjusted by the ball screw, thereby adjusting the distance between the clamps on the joint arms and realizing automatic adjustment of the longitudinal tension ratio.

[0018] When adjusting the lateral pull ratio, base A8 and base B9 move on guide rail 11, and spline shaft 4 is inserted into spline bushing 3, thereby achieving redundant movement distance of spline bushing 3 and spline shaft 4 on base A8 and base B9.

[0019] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for automatically adjusting the transverse and longitudinal amplitudes of a film stretching machine, characterized in that, The device includes a motor (1), a bracket (2), a spline bushing (3), a spline shaft (4), a commutator A (5), a telescopic universal joint (6), a longitudinal amplitude adjustment slide rail (7), a base A (8), a base B (9), an extension shaft (10), a guide rail (11), a servo motor (12), and a commutator B (13). The servo motor (12) is fixed on the bracket (2). One end of the extended shaft (10) is connected to the servo motor (12), and the other end is connected to the ball screw in the guide rail (11) through a coupling. The ball screw is a positive and negative ball screw, and nuts are connected to the positive and negative ball screws respectively. The two nuts are connected to the base A (8) and the base B (9) respectively. When the servo motor (12) rotates, the positive and negative ball screws rotate to drive the base A (8) and the base B (9) to move in opposite directions. The distance between the base A (8) and the base B (9) increases or decreases, thereby driving the distance between the track clamps on the base A (8) and the base B (9) for clamping the film to increase or decrease, so as to realize the automatic adjustment of the transverse stretch ratio. Both base A (8) and base B (9) are equipped with longitudinal amplitude adjustment slide rails (7). The longitudinal amplitude adjustment slide rails (7) include a ball screw nut assembly and a joint arm. The two joint arms are connected to the ball screw by nuts. There are two motors (1), which are fixed on the two side brackets (2). Each motor (1) is connected to a spline bushing (3). The spline bushing (3) is connected to one end of the spline shaft (4), and the other end of the spline shaft (4) is connected to the commutator B (13). The commutator B (13), the telescopic universal joint (6), and the commutator A (5) are connected in sequence. The commutator A (5) is also connected to the ball screw in the longitudinal amplitude adjustment slide rail (7). The distance between the two joint arms is adjusted by driving the ball screw through the motor (1), thereby adjusting the distance between the clamps on the joint arms and realizing automatic adjustment of the longitudinal tension ratio.

2. The device for automatically adjusting the transverse and longitudinal axes of a film stretching machine according to claim 1, characterized in that, When the lateral pull ratio is adjusted, base A (8) and base B (9) move on guide rail (11), and spline shaft (4) is inserted into spline bushing (3) to achieve the movement distance of spline bushing (3) and spline shaft (4) redundant base A (8) and base B (9).

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