Novel longitudinal retraction chain clamp device

Abstract

The invention belongs to the technical field of plastic polymer film material processing and forming devices, and discloses a novel longitudinal retraction chain clamp device. The front structure device and the rear structure device slide on the rails through the bearings, the distance between the front structure device and the rear structure device is achieved by rotating, opening and closing the chain plate in the forward direction and the reverse direction with the pin shaft as the center, and the distance between the front structure device and the rear structure device is adjusted so as to be matched with the change of the distance between the rails on the two sides. When the distance between the front structure device and the rear structure device is changed, due to the fixed length of the chain plate and the constraint of the two rails on the front structure device and the rear structure device, the distance between the adjacent diaphragm clamping devices is correspondingly changed, and when the rails on the two sides are adjusted in advance to be widened or narrowed at the same time, the distance between the adjacent diaphragm clamping devices is changed. The novel longitudinal retraction chain clamp device clamps a film to achieve transverse stretching, control over longitudinal retraction and the shrinkage amount can be completed through the operation, and the purpose that continuous and dynamic longitudinal retraction of the film is controllable can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to plastic polymer film material processing forming device technical field, especially to a new type of longitudinal retraction chain clamp device. BACKGROUND

[0002] The application range of the stretched film is very wide, such as: battery, optics, food, agriculture, aerospace and other fields, the output of the film is increasing every year, the stretching machine is an important key device in the film production line, which plays a decisive role in the line speed, width, stretching ratio and other parameters of the film, and the chain clamp device is the core device of the stretching machine, which plays a key role in realizing the transverse stretching and longitudinal stretching of the film. In the existing stretching machine technology, the adjustment of the two side tracks (the transverse ends of the film) of the transverse stretching machine can realize the transverse shrinkage control of the film, but cannot realize the longitudinal retraction control.

[0003] However, the longitudinal stretching multiple has a great influence on the tensile strength of the film, especially the longitudinal tensile strength of the film, so in order to improve the longitudinal tensile strength of the film, the longitudinal stretching multiple should be appropriately increased, and the main reason is that the orientation and crystallization of the macromolecular chain occur in the stretching process. However, at a certain temperature, with the increase of the longitudinal stretching ratio, the longitudinal shrinkage rate also needs to be increased, so the longitudinal stretching retraction needs to be controlled. Therefore, it is necessary to develop a chain clamp device which can meet the requirements of stable and high-speed longitudinal stretching and simultaneously meet the requirement of controllable longitudinal retraction of the film. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a new type of longitudinal retraction chain clamp device which can meet the requirements of stable and high-speed longitudinal stretching and simultaneously meet the requirement of controllable longitudinal retraction of the film. The front structure device and the rear structure device of the chain clamp device form a connecting rod structure through a plurality of chain plates and a pin shaft, and the distance between the film clamping devices changes with the change of the distance between the two side chain tracks. When the two side tracks are simultaneously widened or narrowed, the clamping film device on the track clamps the film and realizes the transverse stretching with the change of the distance between the tracks, and the change of the distance between the tracks drives the change of the angle of the chain plate, so that the longitudinal distance between the adjacent clamping film devices changes. Because the chain plate is fixed in length and rotates along the pin shaft, the rotation angle range is certain, so that the distance between the clamping film devices changes within a certain range. The above operation can control the longitudinal retraction and shrinkage within a certain range. The film clamping device adopts a circular clamp with a smaller contact area, which greatly improves the flattening degree of the film edge in the longitudinal retraction process, increases the width of the finished film, and improves the production efficiency under the premise of ensuring sufficient clamping force and traction force on the film.

[0005] The technical scheme of the present application is as follows: a new type of longitudinal retraction chain clamp device, comprising a film clamping device, a plurality of front structure devices, a plurality of rear structure devices, a pin shaft, a chain plate and a bearing.

[0006] The front and rear structural components are slidably connected to different tracks via bearings.

[0007] One end of the chain plate is fixed to the front structure device by a pin, and the other end of the chain plate is fixed to the rear structure device by a pin.

[0008] The diaphragm clamping device is connected to the front structure device.

[0009] The clamping part of the diaphragm clamping device adopts a circular clamp.

[0010] Each pin of the front structural unit and each pin of the rear structural unit are simultaneously connected to two chain plates; changing the angle between the chain plate connected to the same pin and the X-axis changes the spacing between adjacent front structural units.

[0011] The front structure includes a front structure and a bearing, which are fixedly connected by a connector; the front structure is connected by a pin. The rear structure includes a rear structure and a bearing, which are fixedly connected by a connector; the rear structure is connected by a pin.

[0012] When adjusting the distance and angle between the two tracks, the chain plate rotates and opens and closes in both directions around the pin shaft. The distance between the Y-axis center lines of the pin shafts between the front structure device and the rear structure device gradually increases. The chain plate is fixed in length and rotates along the pin shaft. The X-axis center distance between the pin shafts of adjacent front structure devices decreases, thereby reducing the distance between two adjacent diaphragm clamping devices.

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

[0014] The front and rear structural components of this novel longitudinal retractable chain clamp device can slide on a track via bearings, and are then connected by pins and chain plates to form an adjustable-space device. The diaphragm clamping device is connected to the front structural component via a connector. The distance between the front and rear structural components is achieved by rotating the chain plate in both directions around the pin. Adjusting the distance between the front and rear structural components allows for changes in the distance between the two side tracks. When the distance between the front and rear structural devices changes, the distance between adjacent diaphragm clamping devices also changes accordingly due to the fixed length of the chain plate and the constraints of the two tracks on the front and rear structural devices. When the tracks on both sides are widened or narrowed simultaneously in advance, the new longitudinal retraction chain clamping device on the track clamps the film device to achieve lateral stretching and simultaneously changes the longitudinal distance between adjacent clamping film devices. Because the chain plate is of fixed length and rotates along the pin shaft, its rotation angle range is fixed, thus making the longitudinal retraction of the film controllable within the range required by the process. The above operation can complete the control of longitudinal retraction and shrinkage, and can achieve the purpose of continuous dynamic and controllable longitudinal retraction of the diaphragm. Attached Figure Description

[0015] Figure 1 A top view schematic diagram of the adjustment of the retraction ratio for the new longitudinal retraction chain clamp device.

[0016] Figure 2 This is an exploded view of a novel longitudinal retraction chain clamp device.

[0017] Figure 3 This is a two-dimensional view of the unfolded axis of the novel longitudinal retractable chain clamp device.

[0018] Figure 4 This is a two-dimensional view of the closed axis of a novel longitudinal retraction chain clamp device.

[0019] Figure 5 Top views of a single chain plate in closed and open positions; (a) open, (b) closed.

[0020] Figure 6 A top view of the novel longitudinal retractable chain clamp device.

[0021] Figure 7 A front view of the novel longitudinal retraction chain clamp device.

[0022] Figure 8 This is a top view of the retraction of the new longitudinal retraction chain clamp device.

[0023] Figure 9 This is a front view of the retracted new longitudinal retraction chain clamp device.

[0024] Figure 10 This is a two-dimensional view of a single set of novel longitudinal retraction chain clamp device.

[0025] In the diagram: 1-Diaphragm clamping device, 2-Front structure device, 3-Rear structure device, 4-Pin shaft, 5-Chain plate, 6-Bearing, 7-Railway. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] A novel longitudinal retractable chain clamping device includes: a diaphragm clamping device 1, several front structural devices 2, several rear structural devices 3, a pin 4, chain plates 5, and bearings 6. Multiple chain plates 5 and pins 4 form a linkage structure. Adjusting the angle of the chain plates 5 with the X-axis adjusts the distance between the front structural devices 2 and the rear structural devices 3, thereby coordinating with changes in the spacing between the two side tracks 7. When the spacing between the front structural devices 2 and the rear structural devices 3 changes, the spacing between adjacent diaphragm clamping devices 1 also changes accordingly. Two sets of the novel longitudinal retractable chain clamping devices are located on two sets of tracks 7, each set of tracks 7 including the following... Figure 1 As shown, when the distance between the straight tracks in the two sets of tracks 7 is widened or narrowed in advance, the membrane clamping device 1 of the new longitudinal retraction chain clamp device clamps the film to achieve lateral stretching. By changing the angle of the chain plate 5 with the X-axis, the longitudinal retraction and longitudinal shrinkage amount can be controlled. The length of the chain plate 5 can be preset according to the actual process requirements, so that its rotation angle range can be set, thereby making the longitudinal retraction of the film within the controllable range required by the process. This can realize the continuous dynamic adjustment and control of the longitudinal retraction ratio of the membrane.

[0028] The front structural device 2 includes a front structure and a bearing 6, which are fixedly connected by a connector; the front structure is connected to a pin 4. The rear structural device 3 includes a rear structure and a bearing 6, which are fixedly connected by a connector; the rear structure is connected to a pin 4. The front structural device 2 and the rear structural device 3 can slide stably along the track.

[0029] The novel longitudinal retraction chain clamp device is mainly used in the transverse stretching and shaping device. After stretching and shaping, the film needs to be appropriately shrunk in both the transverse and longitudinal directions according to process requirements to eliminate the stress of the film and ensure its strength.

[0030] When the distance and angle between the two tracks 7 are adjusted, the new longitudinal retraction chain clamping device, in order to allow the front structural device 2 and the rear structural device 3 to slide on the tracks 7, will have its chain plate 5, connected to the same pin 4, rotate and close in both directions around the pin 4. The distance between the center lines of the front structural device 2 and the rear structural device 3 and the pin 4 gradually increases. Since the chain plate 5 is of fixed length and rotates along the pin 4, the center distance of the pin 4 between adjacent front structural devices 2 decreases, thereby reducing the spacing between the two adjacent membrane clamping devices 1, achieving the purpose of controlling the longitudinal shrinkage of the film. Because the chain plate 5 is of fixed length and rotates along the pin 4, its rotation angle range is constant, thus keeping the longitudinal shrinkage of the film within a controllable range.

[0031] like Figure 1As shown, when the width of track 7 and the mutual angle between the two tracks 7 increase, the distance Y between the pins 4 of the front structural device 2 and the rear structural device 3 will gradually increase, Y1 < Y2 < Y3, while the distance X between adjacent pins 4 of the front structural device 2 will gradually decrease, X1 > X2 > X3. Factors determining the longitudinal shrinkage of the film include the width between the two tracks 7, the mutual tilt angle, and the length of the longitudinal shrinkage zone provided by the diaphragm stretching device. Reflected in the novel longitudinal shrinkage chain clamp device, this is the distance between the front structural device 2, the rear clamping structure 3, and the two adjacent diaphragm clamping devices 1. The larger the distance between the front structural device 2 and the rear clamping structure 3, the smaller the distance between the diaphragm clamping devices 1, and the greater the shrinkage, and vice versa.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel longitudinal retraction chain clamp device, characterized in that, The novel longitudinal retraction chain clamp device includes a diaphragm clamping device (1), several front structural devices (2), several rear structural devices (3), a pin (4), a chain plate (5), and a bearing (6). The front structural device (2) and the rear structural device (3) are slidably connected to different tracks (7) via bearings (6); One end of the chain plate (5) is fixed to the front structure device (2) by a pin (4), and the other end of the chain plate (5) is fixed to the rear structure device (3) by a pin (4). The diaphragm clamping device (1) is connected to the front structure device (2); The clamping part of the diaphragm clamping device (1) adopts a circular clamp.

2. The novel longitudinal retraction chain clamp device according to claim 1, characterized in that, The pin (4) of each front structural device (2) and the pin (4) of each rear structural device (3) are simultaneously connected to two chain plates (5); when the angle between the chain plate (5) connected to the same pin (4) and the X-axis is changed, the distance between adjacent front structural devices (2) is changed.

3. The novel longitudinal retraction chain clamp device according to claim 1, characterized in that, The front structure device (2) includes a front structure and a bearing (6), which are fixedly connected by a connector; the front structure is connected by a pin (4); the rear structure device (3) includes a rear structure and a bearing (6), which are fixedly connected by a connector; the rear structure is connected by a pin (4).

4. The novel longitudinal retraction chain clamp device according to claim 1, characterized in that, When adjusting the distance and angle between the two tracks (7), the chain plate (5) rotates and opens and closes in both directions around the pin (4). The distance between the Y-axis center lines of the pins (4) between the front structure device (2) and the rear structure device (3) gradually increases. The chain plate (5) is fixed in length and rotates along the pin (4). The X-axis center distance of the pins (4) between adjacent front structure devices (2) decreases, thereby reducing the distance between the two adjacent diaphragm clamping devices (1).

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