Stretching device for bag making film production

Abstract

The utility model discloses a stretching device for producing a bag-making film, which relates to the field of wide stretching of films and comprises two groups of mounting racks, conveying mechanisms are mounted between top plates and bottom ends of the mounting racks, and a structure with a narrow inlet and a wide outlet is formed between conveying belt parts of the two conveying mechanisms. An inclined part is arranged between the narrow part and the wide part between the conveying belt parts of the two conveying mechanisms, limiting frames are installed at the bottom end of the top plate and the top end of the bottom plate of the mounting frame correspondingly, and the limiting frames extend in the distribution direction of the wide part, the narrow part and the inclined part of the conveying mechanism; a guide inclined face is integrally formed at the end, located at the narrow portion of the conveying mechanism, of the limiting frame, and fixing lugs protruding inwards are integrally formed on the inner sides of the top plate and the bottom plate of the mounting frame. By arranging the limiting frame, the guide inclined plane and the clamping mechanism, automatic clamping and automatic clamping canceling of the edge of the film can be achieved, manual operation is not needed, and the device cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the wide width stretching field of film, concretely is a kind of for bag-making film production stretching device. BACKGROUND

[0002] The stretching of film includes wide width stretching, which is to stretch thick film extruded by a mold into a certain wide width film. In the prior art, a clamp (also known as film forceps) is needed to clamp the edge of the film during stretching. After passing through the preheating zone and the stretching zone, the thick film is heated to a high elastic state, at which time the stretching can be performed. In the prior art, the clamp for clamping the edge of the film generally adopts a pneumatic mode, and a sensor is used to control the clamping and unclamping of each clamp. The cost is relatively high, and manual operation is required when the sensor malfunctions. SUMMARY

[0003] The utility model aims at solving the problems raised in the background art and provides a bag-making film production stretching device.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a bag-making film production stretching device, comprising two groups of mounting racks, a conveying mechanism is installed between the top plate and the bottom end of the mounting rack, the conveying belt parts of the two conveying mechanisms are structured with a narrow inlet and a wide outlet, and an inclined part is located between the narrow part and the wide part between the conveying belt parts of the two conveying mechanisms, the top plate bottom end and the bottom plate top end of the mounting rack are both installed with a limiting rack, the limiting rack is arranged along the distribution direction of the wide part, the narrow part and the inclined part of the conveying mechanism, the limiting rack is integrally formed with a guide inclined surface at one end of the narrow part of the conveying mechanism, the top plate and the bottom plate of the mounting rack are integrally formed with a fixed lug protruding inward, a limiting disc for limiting one end of the inclined part of the conveying mechanism is rotatably installed on the fixed lug, and a plurality of clamping mechanisms are equidistantly distributed along the track of the conveying mechanism.

[0005] As a further scheme of the utility model: the clamping mechanism comprises a plurality of connecting sleeve assemblies, one of the connecting sleeve assemblies comprises two guide sliding sleeves, and the two guide sliding sleeves are symmetrically distributed above and below the transverse center axis of the conveying mechanism.

[0006] As a further scheme of the utility model: the clamping mechanism further comprises a sliding rod slidingly connected with the inner wall of the guide sliding sleeve, the bottom end of the upper sliding rod is integrally formed with a clamping ball, and the top of the lower sliding rod is integrally formed with a clamping ball groove covering the outer wall of the clamping ball.

[0007] As a further scheme of the present utility model: one end of two sliding rods away from each other is integrally formed with a containing ball groove, the inner wall of the containing ball groove is movably connected with a ball bearing, the outer wall of two sliding rods is integrally formed with a connecting plate, and the connecting plate and the guide sliding sleeve are abutted with a spring.

[0008] As a further scheme of the present utility model: the inner wall diameter of the clamping ball groove is larger than the diameter of the clamping ball.

[0009] Compared with the prior art, the present utility model has the beneficial effects that:

[0010] 1. By setting the limiting frame, the guide slope and the clamping mechanism, automatic clamping and automatic canceling clamping of the film edge can be realized, manual operation is not needed, and the device cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic view of the present utility model;

[0012] Figure 2 It is an installation schematic view of the clamping mechanism of the present utility model;

[0013] Figure 3 It is an internal structure schematic view of the clamping mechanism of the present utility model;

[0014] Figure 4 It is a Figure 3 It is a local enlarged view of A in the present utility model;

[0015] Figure 5 It is a distribution schematic view of the limiting disc and the limiting frame of the present utility model.

[0016] In the figure: 1, mounting frame; 2, conveying mechanism; 3, limiting frame; 4, guide slope; 5, fixed lug; 6, limiting disc; 7, guide sliding sleeve; 8, sliding rod; 9, spring; 10, clamping ball groove; 11, clamping ball; 12, containing ball groove; 13, ball bearing; 14, connecting plate. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present utility model.

[0018] Please refer to Figures 1-4The utility model discloses an embodiment of a kind of for bag making film production stretching device, including two groups of mounting bracket 1, the top plate of mounting bracket 1 is equipped with conveying mechanism 2 between bottom end, the conveying belt part between two conveying mechanisms 2 is narrow in import, wide structure in export, and conveying belt part between two conveying mechanisms 2 between narrow part and wide part has inclined portion, the top plate bottom end of mounting bracket 1 and the top end of bottom plate are all equipped with limit frame 3, limit frame 3 is extendedly arranged along the distribution direction of wide part, narrow part and inclined portion of conveying mechanism 2, limit frame 3 is integrally formed with guide inclined plane 4 in one end of narrow part of conveying mechanism 2, the inboard of top plate and bottom plate of mounting bracket 1 is integrally formed with fixed lug 5 that protrudes inwards, fixed lug 5 is rotatably installed with limit disc 6 that is located to the limit of inclined portion one end of conveying mechanism 2, the outer periphery of conveying mechanism 2 is equidistantly distributed with multiple clamping mechanisms along the track of conveying mechanism 2.

[0019] In the embodiment: the distribution track formed by the conveying belt part of two conveying mechanisms 2, cooperation clamping mechanism can be realized in the process of pulling thick film movement, the tension on the wide width of thick film is formed, and the thick film is stretched on the wide width;

[0020] When multiple clamping mechanisms are in the process of moving with conveying belt part, when clamping mechanism contacts with the guide inclined plane 4 of limit frame 3, the guide inclined plane 4 applies extrusion force to the two parts of clamping mechanism, so that the two parts of clamping mechanism clamp the edge of film, and the clamping state is kept during stretching process;

[0021] The design of fixed lug 5 and limit disc 6 can realize that the conveying belt part of conveying mechanism 2 is distributed according to the designed track, and the inner bending of conveying belt part is stably limited, and limit disc 6 rotates under friction in the process of conveying belt part transmission.

[0022] Please refer to Figure 2 、 Figure 3 and Figure 4 , the clamping mechanism includes multiple groups of connecting sleeve assemblies, a group of connecting sleeve assemblies includes two guide sliding sleeves 7, the two guide sliding sleeves 7 are symmetrically distributed up and down along the transverse center axis of conveying mechanism 2, the clamping mechanism further includes sliding rod 8 that is slidably connected to the inner wall of the guide sliding sleeve 7, the bottom end of the upper sliding rod 8 is integrally formed with clamping ball 11, the top of the lower sliding rod 8 is integrally formed with clamping ball groove 10 that covers the outer wall of clamping ball 11, the ends of the two sliding rods 8 away from each other in a group are integrally formed with containing ball groove 12, the inner wall of containing ball groove 12 is movably connected with ball 13, the outer wall of the two sliding rods 8 is integrally formed with connecting plate 14, and spring 9 is abutted between connecting plate 14 and guide sliding sleeve 7.

[0023] In the embodiment, when the clamping mechanism is driven by the conveying belt part, the ball 13 continuously moves after entering the narrow opening part of the two conveying mechanisms 2, at this time the ball 13 is in contact with the guide slope 4, the guide slope 4 applies a pressing force to the ball 13, at this time the ball 13 applies a pressing force to the two sliding rods 8 through the ball groove 12, the two sliding rods 8 move towards each other in the vertical direction, at this time the sliding rod 8 drives the connecting plate 14 to press the spring 9, the spring 9 is compressed, and at the same time the two sliding rods 8 drive the clamping ball groove 10 and the clamping ball 11 to move towards each other, so that the thick film edge is effectively clamped, at this time the clamping mechanism can be driven by the conveying belt part of the conveying mechanism 2 to pull the thick film to move and stretch the thick film in the inclined part of the conveying belt part.

[0024] When the clamping mechanism moves to the wide part between the two conveying mechanisms 2, at this time the two parts of the clamping mechanism are separated from the limiting frame 3, at this time the two springs 9 are reset to separate the clamping ball groove 10 and the clamping ball 11, so that the clamping of the stretched film is cancelled, and this process does not need manual operation of the staff, and has a good automatic effect.

[0025] Please refer to Figure 3 and Figure 4 , the inner wall diameter of the clamping ball groove 10 is greater than the diameter of the clamping ball 11.

[0026] In the embodiment, the above design can leave a certain space for clamping of the film, so as to avoid the problem of broken film caused by excessive clamping.

[0027] The above only describes a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A stretching device for bag-making film production, comprising two sets of mounting frames (1), characterized in that, The top plate and the bottom end of the mounting frame (1) are provided with conveying mechanisms (2), the conveying belt parts of the two conveying mechanisms (2) are provided with a structure of narrow inlet and wide outlet, and the conveying belt parts of the two conveying mechanisms (2) are provided with an inclined part between the narrow part and the wide part, the top plate of the mounting frame (1) and the top end of the bottom plate are provided with limiting racks (3), the limiting racks (3) extend along the distribution direction of the wide part, the narrow part and the inclined part of the conveying mechanism (2), the limiting rack (3) is integrally formed with a guide inclined surface (4) at one end of the narrow part of the conveying mechanism (2), the top plate and the bottom plate of the mounting frame (1) are integrally formed with a fixed lug (5) protruding inward, the fixed lug (5) is rotatably provided with a limiting disc (6) for limiting one end of the inclined part of the conveying mechanism (2), and the outer periphery of the conveying mechanism (2) is provided with a plurality of clamping mechanisms equidistantly distributed along the track of the conveying mechanism (2).

2. The stretching device for bag-making film production according to claim 1, characterized in that, The clamping mechanism comprises a plurality of connecting sleeve assemblies, and each connecting sleeve assembly comprises two guide sliding sleeves (7) which are symmetrically distributed above and below along the transverse center axis of the conveying mechanism (2).

3. The stretching device for bag-making film production according to claim 2, characterized in that, The clamping mechanism further comprises a sliding rod (8) which is slidably connected to the inner wall of the guide sliding sleeve (7), the bottom end of the upper sliding rod (8) is integrally formed with a clamping ball (11), and the top of the lower sliding rod (8) is integrally formed with a clamping ball groove (10) which covers the outer wall of the clamping ball (11).

4. The stretching device for bag-making film production according to claim 3, characterized in that, The ends of the two sliding rods (8) away from each other in one group are integrally formed with a containing ball groove (12), the inner wall of the containing ball groove (12) is movably connected with a ball (13), the outer walls of the two sliding rods (8) are integrally formed with a connecting plate (14), and the connecting plate (14) and the guide sliding sleeve (7) are abutted by a spring (9).

5. The stretching device for bag-making film production according to claim 4, characterized in that, The inner wall diameter of the clamping ball groove (10) is greater than the diameter of the clamping ball (11).

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