Film stretching clamp and film stretching machine

Abstract

The utility model relates to the technical field of film production, in particular to a film stretching clamp and a film stretching machine. The film stretching clamp comprises a first clamp plate body and a second clamp plate body; a positioning spline groove is formed in the first clamp plate body, a positioning protrusion is arranged on the second clamp plate body, and the positioning protrusion and the positioning spline groove are arranged in a matched mode. The length direction of the positioning spline groove is parallel to the stretching direction of the film stretching clamp; and at least one end part in the length direction of the positioning spline groove is an open end. On the second aspect, the utility model provides a thin film stretching machine which comprises the thin film stretching clamp of any one of the implementation modes. According to the utility model, the positioning spline groove is matched with the positioning bulge, so that the stretching error caused by human factors can be improved to a great extent, and the stretching accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of film production, in particular to a film stretching clamp and a film stretching machine. Background Art

[0002] In order to meet the growing domestic market demand for the protective film industry, most companies are urgently developing and upgrading new protective films to provide perfect protection for various objects. The most important properties of protective films are tensile strength and elongation at break, so many companies will make various improvements to this aspect so that the protection requirements of the objects can be met. At the same time, tensile performance is also a crucial performance for the development of the domestic protective film industry.

[0003] In most tensile strength tests, the film strips are 100 mm x 10 mm in size. First, the cut strips are manually clamped in a tensile fixture for tensile testing.

[0004] This artificially supported spline cannot guarantee that the vertical direction of the spline is parallel to the stretching direction, and due to human factors, there will always be an inclination angle between the two. The tensile data tested in this way will have large and small differences due to different inclination angles for the same film material, resulting in inaccurate tensile data for the film material, and therefore cannot accurately characterize this property of the film. Utility Model Content

[0005] The purpose of the utility model is to provide a film stretching clamp, which can solve the above-mentioned technical problems.

[0006] The embodiment of the utility model is achieved as follows:

[0007] In a first aspect, the utility model provides a film stretching clamp, comprising a first clamp plate body and a second clamp plate body;

[0008] The first fixture plate is provided with a positioning spline groove, and the second fixture plate is provided with a positioning protrusion, and the positioning protrusion is matched with the positioning spline groove;

[0009] The length direction of the positioning spline groove is parallel to the stretching direction of the film stretching fixture;

[0010] At least one end of the positioning spline groove in the length direction is an open end.

[0011] In an optional embodiment, the positioning spline groove is in the shape of a polygon, a circle, an ellipse or a star;

[0012] The shape of the positioning protrusion is matched with the shape of the positioning spline groove.

[0013] In an optional embodiment, it also includes a first replaceable module and a second replaceable module;

[0014] The first replaceable module is detachably arranged on the first fixture plate, and the positioning spline groove is arranged on the first replaceable module;

[0015] The second replaceable module is detachably arranged on the second fixture plate, and the positioning protrusion is arranged on the second replaceable module.

[0016] In an optional embodiment, the first replaceable module and the first fixture plate are connected by bolt connection or clamping;

[0017] The second replaceable module and the second fixture plate are connected by bolt connection or clamping.

[0018] In an optional embodiment, a telescopic baffle is provided on at least one side wall of the positioning spline groove, and the telescopic baffle is used to adjust the width, length or depth of the positioning spline groove;

[0019] A telescopic support plate is arranged on the side wall of the positioning protrusion, and the telescopic support plate is used to adjust the width, length and height of the positioning protrusion so that the positioning protrusion can match the positioning spline groove.

[0020] In an optional embodiment, a first telescopic structure is connected to the telescopic baffle;

[0021] The first telescopic structure is a spring telescopic structure, a scissor-type telescopic structure or a threaded screw driven telescopic structure;

[0022] The telescopic support plate is connected to a second telescopic structure;

[0023] The second telescopic structure is a spring telescopic structure, a scissor-type telescopic structure or a threaded screw driven telescopic structure.

[0024] In an optional embodiment, the first telescopic structure and the second telescopic structure are the same or different.

[0025] In an optional embodiment, the first telescopic structure is provided with a telescopic gear, and the second telescopic structure is provided with a corresponding telescopic gear.

[0026] In an optional embodiment, the first fixture plate body and the second fixture plate body are detachably connected;

[0027] Alternatively, the first clamp plate body and the second clamp plate body are clamped by external force.

[0028] In a second aspect, the utility model provides a film stretching machine, comprising the film stretching clamp described in any one of the aforementioned embodiments.

[0029] The beneficial effects of the embodiments of the utility model are:

[0030] The positioning spline groove is parallel to the stretching direction, and the spline position is fixed. As long as the sample is clamped inside the positioning spline groove and stretched, the vertical direction of the spline can be guaranteed to be parallel to the stretching direction. At the same time, the convex groove is pressed into the positioning spline groove to fix the position of the spline again, and once again ensure that the spline is parallel to the stretching direction.

[0031] Through the coordination of the positioning spline groove and the positioning protrusion, the stretching error caused by human factors can be improved to a great extent, thereby improving the stretching accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a film stretching fixture provided by an embodiment of the utility model;

[0034] Figure 2 A schematic structural diagram of a film stretching fixture provided by another embodiment of the utility model;

[0035] Figure 3 A schematic structural diagram of a first telescopic structure provided in an embodiment of the utility model;

[0036] Figure 4 This is a structural schematic diagram of a first telescopic structure provided in another embodiment of the utility model.

[0037] Icons: 1-first fixture plate; 2-second fixture plate; 3-positioning spline groove; 4-positioning protrusion; 5-first replaceable module; 6-second replaceable module; 7-driving micromotor; 8-pull rope; 9-compression spring; 10-telescopic support plate; 11-transmission gear; 12-transmission nut; 13-transmission screw; 14-positioning column. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0042] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The following is combined with Figure 1 To Attachment Figure 4 , some embodiments of the present utility model are described in detail. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0045] In the first aspect, the utility model provides a film stretching clamp, comprising a first clamp plate 1 and a second clamp plate 2; the first clamp plate 1 is provided with a positioning spline groove 3, the second clamp plate 2 is provided with a positioning protrusion 4, the positioning protrusion 4 is matched with the positioning spline groove 3; the length direction of the positioning spline groove 3 is parallel to the stretching direction of the film stretching clamp; at least one end of the positioning spline groove 3 in the length direction is an open end. In an optional embodiment, the shape of the positioning spline groove 3 is polygonal, circular, elliptical or star-shaped; the shape of the positioning protrusion 4 is matched with the shape of the positioning spline groove 3.

[0046] Specifically, in this embodiment, when the first clamp plate 1 and the second clamp plate 2 are used in combination, the positioning protrusion 4 is inserted into the positioning spline groove 3, and the positioning spline groove 3 is used to perform initial positioning of the film. The positioning protrusion 4 is inserted into the positioning spline groove 3 to perform secondary positioning of the film, thereby improving the positioning stability of the film during the stretching process.

[0047] Specifically, when in use, the film spline is placed in the positioning spline groove 3 for initial positioning, and then the positioning protrusion 4 is set in the positioning spline groove 3 to press the film spline to achieve secondary positioning. Finally, after the first clamp plate 1 and the second clamp plate 2 are fixed, the film tensile test can be carried out.

[0048] When in use, it is required that the width of the positioning spline groove 3 is consistent with that of the spline, and at the same time, the length of the positioning spline groove 3 is parallel to the stretching direction.

[0049] During the test, the spline is clamped in the positioning spline groove 3, and the spline can be parallel to the direction of the clamp, the clamp is tightened, and the positioning protrusion 4 is clamped in the positioning spline groove 3 to press the spline, and the tensile test begins. Through the cooperation of the positioning spline groove 3 and the positioning protrusion 4 on the first clamp plate 1 and the second clamp plate 2, the tensile error caused by human factors can be greatly improved, thereby improving the tensile accuracy.

[0050] The technical principle of the utility model is as follows:

[0051] The positioning spline groove 3 is parallel to the stretching direction and the spline position is fixed. As long as the sample is clamped inside the positioning spline groove 3 and stretched, it can be ensured that the vertical direction of the spline is parallel to the stretching direction. At the same time, the positioning protrusion 4 is pressed into the positioning spline groove 3 to fix the position of the spline again, and once again ensure that the spline is parallel to the stretching direction.

[0052] In an optional embodiment, it also includes a first replaceable module 5 and a second replaceable module 6; the first replaceable module 5 is detachably arranged on the first fixture plate body 1, and the positioning spline groove 3 is arranged on the first replaceable module 5; the second replaceable module 6 is detachably arranged on the second fixture plate body 2, and the positioning protrusion 4 is arranged on the second replaceable module 6.

[0053] In this embodiment, the arrangement of the first replaceable module 5 and the second replaceable module 6 enables the film stretching fixture to be suitable for splines of different shapes or specifications.

[0054] Specifically, after the spline is replaced, the original positioning spline groove 3 and positioning protrusion 4 are not applicable due to changes in size or shape. By replacing the first replaceable module 5 and the second replaceable module 6, the positioning spline groove 3 can be matched with the film spline, so that the test can be carried out again.

[0055] In an optional embodiment, the first replaceable module 5 is connected to the first fixture plate 1 by bolt connection or clamping; the second replaceable module 6 is connected to the second fixture plate 2 by bolt connection or clamping.

[0056] In this embodiment, the connection between the first replaceable module 5 and the first fixture plate body 1 can be fixed by bolt connection, or fixed by snap connection, or fixed by other detachable connection methods, as long as the connection between the first replaceable module 5 and the first fixture plate body 1 can be achieved by a detachable connection method.

[0057] Similarly, in this embodiment, the connection method between the second replaceable module 6 and the second fixture plate body 2 can be fixed by bolt connection, or fixed by snap connection, or fixed by other detachable connection methods, as long as the connection between the second replaceable module 6 and the second fixture plate body 2 can be achieved by a detachable connection method.

[0058] It can be understood that the connection mode between the first replaceable module 5 and the first fixture plate body 1 and the connection mode between the second replaceable module 6 and the second fixture plate body 2 may be the same or different.

[0059] In an optional embodiment, a telescopic baffle is provided on at least one side wall of the positioning spline groove 3, and the telescopic baffle is used to adjust the width, length or depth of the positioning spline groove 3; a telescopic support plate 10 is provided on the side wall of the positioning protrusion 4, and the telescopic support plate 10 is used to adjust the width, length and height of the positioning protrusion 4, so that the positioning protrusion 4 can match the positioning spline groove 3.

[0060] In this embodiment, after a telescopic baffle is provided on the side wall of the positioning spline groove 3, the size of the positioning spline groove 3 can be changed. For example, when the positioning spline groove 3 is a rectangular groove, the width, length, depth and other parameters of the positioning spline groove 3 can be changed by the telescopic baffle, or by changing the angle between one or several side walls of the positioning spline groove 3, the shape of the positioning spline groove 3 can be changed.

[0061] Similarly, a telescopic support plate 10 is provided on the side wall of the positioning protrusion 4 , and its setting position corresponds to the position of the telescopic baffle on the positioning spline groove 3 , so that the positioning protrusion 4 can match the shape and size of the positioning spline groove 3 .

[0062] The telescopic baffle is connected to a first telescopic structure; the first telescopic structure is a spring telescopic structure, a scissors-type telescopic structure or a threaded screw driven telescopic structure; the telescopic support plate 10 is connected to a second telescopic structure; the second telescopic structure is a spring telescopic structure, a scissors-type telescopic structure or a threaded screw driven telescopic structure.

[0063] In this embodiment, the spring telescopic structure includes a compression spring 9, a pull rope 8 and a driving micromotor 7. The driving micromotor 7 is fixedly arranged on the first fixture plate body 1 or the first replaceable module 5. The motor shaft is connected to one end of the pull rope 8, and the other end of the pull rope 8 is connected to the side wall of the telescopic baffle or the telescopic support plate 10. One end of the compression spring 9 is connected to the first fixture plate body 1 or the first replaceable module 5, and the other end is connected to the side wall of the telescopic baffle or the telescopic support plate 10. The compression spring 9 can apply a force to the telescopic baffle or the telescopic support plate 10 in a direction away from the driving micromotor 7.

[0064] When the driving micromotor 7 is started, the pull rope 8 is wound around the motor shaft, thereby pulling the telescopic baffle or the telescopic support plate 10 to move, thereby changing the size or shape of the positioning spline groove 3; when the driving micromotor 7 is started in reverse, the pull rope 8 is released on the motor shaft, and the telescopic baffle or the telescopic support plate 10 moves away from the driving micromotor 7 under the action of the compression spring 9, thereby changing the size or shape of the positioning spline groove 3.

[0065] In this embodiment, the threaded screw drive telescopic structure includes a drive micromotor 7, a transmission gear 11, a transmission nut 12 with an external gear, and a drive screw 13. The drive micromotor 7 is fixedly arranged on the first fixture plate 1 or the first replaceable module 5, the transmission gear 11 is arranged on the motor shaft, the transmission nut 12 is meshed with the transmission gear 11, and is threadedly connected with the drive screw 13, one end of the drive screw 13 is fixedly connected with the telescopic baffle or the telescopic support plate 10, and the other end of the drive screw 13 is slidably arranged on a fixed positioning column 14, and the rotation of the drive screw 13 is restricted by the positioning column 14, so that the drive screw 13 can only move axially.

[0066] It should be pointed out that, in the present embodiment, the first telescopic structure and the second telescopic structure can be any one of the above-mentioned telescopic methods, but are not limited to the above-mentioned telescopic methods. They can also be other telescopic structures as long as they can realize the movement of the telescopic support plate 10 or the telescopic baffle, thereby achieving the change of the size and shape of the positioning spline groove 3 and the positioning protrusion 4.

[0067] It can be understood that the specific telescopic manners of the first telescopic structure and the second telescopic structure may be the same or different.

[0068] The first telescopic structure is provided with a telescopic gear, and the second telescopic structure is provided with a corresponding telescopic gear.

[0069] In this embodiment, in order to facilitate accurate positioning of the telescopic structure, telescopic gears are set for both the first telescopic structure and the second telescopic structure.

[0070] That is, the shape change of the positioning spline groove 3 is preset, so that commonly used film splines can be quickly adapted.

[0071] At the same time, the first telescopic structure and the second telescopic structure can also be customized to increase their applicable scope during use.

[0072] The first fixture plate body 1 and the second fixture plate body 2 are detachably connected;

[0073] Alternatively, the first clamp plate body 1 and the second clamp plate body 2 are clamped by external force.

[0074] In a second aspect, the utility model provides a film stretching machine, comprising the film stretching clamp described in any one of the aforementioned embodiments.

[0075] The beneficial effects of the embodiments of the utility model are:

[0076] The positioning spline groove 3 is parallel to the stretching direction and the spline position is fixed. As long as the sample is clamped inside the positioning spline groove 3 and stretched, it can be ensured that the vertical direction of the spline is parallel to the stretching direction. At the same time, the convex groove is pressed into the positioning spline groove 3 to fix the position of the spline again, and once again ensure that the spline is parallel to the stretching direction.

[0077] Through the cooperation between the positioning spline groove 3 and the positioning protrusion 4, the stretching error caused by human factors can be improved to a great extent, thereby improving the stretching accuracy.

[0078] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A film stretching fixture, characterized in that: comprising a first fixture plate body and a second fixture plate body; The first fixture plate is provided with a positioning spline groove, and the second fixture plate is provided with a positioning protrusion, and the positioning protrusion is matched with the positioning spline groove; The length direction of the positioning spline groove is parallel to the stretching direction of the film stretching fixture; At least one end of the positioning spline groove in the length direction is an open end.

2. The film stretching fixture according to claim 1, characterized in that: The positioning spline groove is in the shape of a polygon, a circle, an ellipse or a star; The shape of the positioning protrusion is matched with the shape of the positioning spline groove.

3. The film stretching fixture according to claim 1, characterized in that: Also includes a first replaceable module and a second replaceable module; The first replaceable module is detachably arranged on the first fixture plate, and the positioning spline groove is arranged on the first replaceable module; The second replaceable module is detachably arranged on the second fixture plate, and the positioning protrusion is arranged on the second replaceable module.

4. The film stretching fixture according to claim 3, characterized in that: The first replaceable module and the first fixture plate are connected by bolt connection or clamping; The second replaceable module and the second fixture plate are connected by bolt connection or clamping.

5. The film stretching fixture according to claim 1, characterized in that: A telescopic baffle is provided on at least one side wall of the positioning spline groove, and the telescopic baffle is used to adjust the width, length or depth of the positioning spline groove; A telescopic support plate is arranged on the side wall of the positioning protrusion, and the telescopic support plate is used to adjust the width, length and height of the positioning protrusion so that the positioning protrusion can match the positioning spline groove.

6. The film stretching fixture according to claim 5, characterized in that: The telescopic baffle is connected to a first telescopic structure; The first telescopic structure is a spring telescopic structure, a scissor-type telescopic structure or a threaded screw driven telescopic structure; The telescopic support plate is connected to a second telescopic structure; The second telescopic structure is a spring telescopic structure, a scissor-type telescopic structure or a threaded screw driven telescopic structure.

7. The film stretching fixture according to claim 6, characterized in that: The first telescopic structure and the second telescopic structure are the same or different.

8. The film stretching fixture according to claim 6, characterized in that: The first telescopic structure is provided with a telescopic gear, and the second telescopic structure is provided with a corresponding telescopic gear.

9. The film stretching fixture according to claim 1, characterized in that: The first fixture plate body and the second fixture plate body are detachably connected; Alternatively, the first clamp plate body and the second clamp plate body are clamped by external force.

10. A film stretching machine, characterized in that: A film stretching fixture comprising the film stretching fixture according to any one of claims 1 to 9.

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