Biaxial stretching machine for polyethylene membrane

Abstract

The utility model relates to the technical field of two-way stretching machines, and discloses a polyethylene membrane two-way stretching machine which comprises a working table, four sliding openings distributed in a cross shape are formed in the outer surface of the working table, sliding clamping grooves are formed in the two sides of the four sliding openings, two symmetrical connecting blocks are fixedly connected to the top of the working table, and the two symmetrical connecting blocks are fixedly connected to the top of the working table. A first fixing block is jointly and fixedly connected between the top ends of the two connecting blocks, the four edges of a to-be-tested diaphragm are clamped on stretching square pieces through four clamping pieces, then through rotation of a rotary knob, the four stretching square pieces can synchronously slide in a diaphragm placing opening by utilizing synchronous rotation of four first rotating blocks, and the four stretching square pieces can synchronously slide in the diaphragm placing opening. The four edges of the to-be-detected membrane are synchronously stretched through the synchronous stretching device, the stretching strength is the same, extra accurate setting is not needed, the device is simple in mechanism and convenient to use, multi-batch detection can be conducted through the device when extremely accurate stretching strength data are not needed, and the stretching detection efficiency of the whole polyethylene membrane is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of biaxial stretching machines, in particular to a biaxial stretching machine for polyethylene films. Background Art

[0002] Polyethylene diaphragm is a thin film made from polyethylene through processes such as extrusion and blow molding. It is widely used in various fields of industry, agriculture, and daily life. Polyethylene is a common thermoplastic material with excellent physical and chemical properties, so the diaphragm made from it has important application value in many fields.

[0003] During the production process of polyethylene film, in order to test the tensile properties of the polyethylene film, a biaxial stretching machine is required to perform biaxial stretching on the polyethylene film. However, the existing biaxial stretching machine is not only complex in structure and expensive, but also requires special adjustment to ensure uniform biaxial stretching force and thus complete the accuracy of the stretching data. This is time-consuming and labor-intensive for multi-batch testing.

[0004] Therefore, it is necessary to design a polyethylene film biaxial stretching machine to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a polyethylene film biaxial stretching machine for solving the technical problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a polyethylene film biaxial stretching machine, comprising a workbench, the outer surface of the workbench is provided with four sliding openings distributed in a cross shape, and sliding slots are provided on both sides of the four sliding openings, the top of the workbench is fixedly connected to two symmetrical connecting blocks, and a first fixing block is fixedly connected to the tops of the two connecting blocks, and the internal threads of the first fixing block are inserted with a first screw, and the top of the first screw is fixedly connected with a knob, and the bottom of the first fixing block is fixedly connected with two symmetrical positioning connecting columns, and the bottoms of the two positioning connecting columns are fixedly fixed with a second fixing block, and the outer surface of the first screw is threadedly sleeved with a lifting plate, and notches are provided on all four sides of the lifting plate, and the insides of the four notches are rotatably connected to a first rotating shaft, and the outer surfaces of the four first rotating shafts are fixedly sleeved with a first The cam is connected with the second end of the second shaft by the threaded rod and the threaded rod is fixed on the top of the cam, and the cam is connected with the second end of the second shaft by the threaded rod.

[0007] Preferably, the bottom end of the first screw is threadedly inserted into the outer surface of the lifting plate, and the bottoms of the two positioning connecting columns are slidably inserted into the outer surface of the lifting plate, and the lifting plate is located directly above the mold placement port.

[0008] Preferably, the clamping piece is slidably arranged inside the U-shaped opening, and the clamping piece is a square block, and one side of the clamping piece is in contact with one side of the U-shaped opening, and a plurality of protrusions are fixed to the bottom of the second screw.

[0009] Preferably, the four sleeve blocks are movably sleeved inside the four openings on the four second rotating shafts, and the four sleeve blocks are slidably arranged inside the four sliding openings.

[0010] Preferably, the connecting block is L-shaped, and the bottom ends of the two connecting blocks are respectively fixed to the outer sides of the two sliding openings on the top of the workbench, and the second fixed block is a disc, and the second fixed block is located directly above the mold placement opening.

[0011] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0012] The utility model clamps the four sides of the diaphragm to be tested on the stretching square piece by four clamping pieces. Afterwards, by rotating the knob, the four first rotating blocks can be used to synchronously rotate, so that the four stretching square pieces can synchronously slide inside the mold placement port, thereby synchronously stretching the four sides of the diaphragm to be tested, so that the stretching force is the same and no additional precise setting is required. The device has a simple structure and is easy to use. When extremely precise stretching force data is not required, the device can perform multiple batches of tests, thereby improving the stretching test efficiency of the entire polyethylene diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the exploded structure of the workbench of the present invention;

[0015] Figure 3 This is a schematic diagram of the structure of the clamping piece and the protrusion of the utility model;

[0016] In the figure: 1. workbench; 2. connecting block; 3. first fixed block; 4. knob; 5. positioning connecting column; 6. first screw; 7. lifting plate; 8. first rotating axis; 9. first rotating block; 10. sliding mouth; 11. opening; 12. sleeve block; 13. stretching square piece; 14. mold placement mouth; 15. second fixed block; 16. sliding slot; 17. clamping block; 18. second rotating axis; 19. second rotating block; 20. second screw; 21. protrusion; 22. clamping piece. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0018] Obviously, many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0019] See also Figure 1-3The utility model provides a polyethylene film biaxial stretching machine, comprising a workbench 1, wherein the outer surface of the workbench 1 is provided with four sliding openings 10 distributed in a cross shape, and both sides of the four sliding openings 10 are provided with sliding slots 16, the top of the workbench 1 is fixedly connected with two symmetrical connecting blocks 2, and a first fixing block 3 is fixedly connected between the top ends of the two connecting blocks 2, and the internal thread of the first fixing block 3 is inserted with a first screw 6, and the top of the first screw 6 is fixedly connected with a knob 4, and the bottom of the first fixing block 3 is fixedly connected with two symmetrical positioning connecting columns 5, and the bottoms of the two positioning connecting columns 5 are fixedly connected with a second fixing block 15, and the outer ends of the first screw 6 are fixedly connected with the first screw 6. The surface is threadedly sleeved with a lifting plate 7, and notches are provided on all four sides of the lifting plate 7, and the inside of the four notches are rotatably connected to the first rotating shaft 8, the outer surfaces of the four first rotating shafts 8 are fixedly sleeved with the first rotating blocks 9, and the bottom ends of the four first rotating blocks 9 are provided with openings 11, and the bottom ends of the four first rotating blocks 9 are rotatably plugged with the second rotating shaft 18, and the two ends of the four second rotating shafts 18 are respectively slidably inserted into the inside of the two sliding slots 16 on the same side, and the two ends of the four second rotating shafts 18 are fixedly connected with a card block 17, and the eight card blocks 17 are respectively slidably plugged into the inside of the eight sliding slots 16, and the center of the workbench 1 is provided with a mold placement port 14, and the four sliding openings 10 are slidably plugged with stretching square pieces 13 on the outer surface of one side of the die placement opening 14, and one end of the four stretching square pieces 13 is fixedly connected with a sleeve block 12, and the four sleeve blocks 12 are movably sleeved on the outer surface of the four second rotating shafts 18, and the other end of the four stretching square pieces 13 is provided with a U-shaped opening, and the top of the four U-shaped openings is threadedly plugged with a second screw 20, and the top of the second screw 20 is fixedly connected with a second rotating block 19, and the bottom end of the second screw 20 is rotatably connected with a clamping piece 22, so that at the die placement opening 14, the four sides of the diaphragm to be tested are moved by rotating the second rotating block 19 and utilizing the lifting of the four clamping pieces 22 in the U-shaped opening. Lowering, clamp the four sides of the diaphragm to be tested and stabilize it. Then, by turning the knob 4 and utilizing the rotation of the first screw 6, the lifting plate 7 is allowed to descend on the top of the second fixed block 15 under the limit of the two positioning connecting columns 5. At this time, the four positioning connecting columns 5 will rotate synchronously, so that the four second rotating shafts 18 can slide synchronously inside the four sliding openings 10, so as to utilize the sliding of the four stretching square pieces 13 to pull the four sides of the diaphragm, thereby performing a simple diaphragm test, and simply observing the quality of the diaphragm by the degree of deformation of the diaphragm. When the force does not need to be tested particularly accurately, the device has a simple structure and is easy to operate. In addition, multi-batch testing also saves time, which greatly improves the efficiency of diaphragm stretching testing.

[0020] In order to improve the stability of the lifting plate 7 when it is lifted and lowered above the second fixed block 15, the bottom end of the first screw 6 is threadedly inserted into the outer surface of the lifting plate 7, and the bottoms of the two positioning connecting columns 5 are slidably inserted into the outer surface of the lifting plate 7, and the lifting plate 7 is located directly above the mold placement port 14.

[0021] In order to improve the stability of clamping the side of the diaphragm, the clamping piece 22 is slidably set inside the U-shaped mouth, and the clamping piece 22 is a square block, and one side of the clamping piece 22 is in contact with one side of the U-shaped mouth, and a plurality of protrusions 21 are fixed to the bottom of the second screw 20.

[0022] In order to detect the stretching effect of the diaphragm by utilizing the stable sliding of the four sleeves 12 inside the die placement opening 14 when the four second rotating shafts 18 slide inside the four sliding openings 10, the four sleeves 12 are movably sleeved inside the four openings 11 on the four second rotating shafts 18, and the four sleeves 12 are slidably set inside the four sliding openings 10.

[0023] In order to facilitate the fixing of the first fixed block 3 and the position of the second fixed block 15, thereby facilitating the lifting and lowering of the lifting plate 7, the connecting block 2 is L-shaped, and the bottom ends of the two connecting blocks 2 are respectively fixed to the outer sides of the two sliding openings 10 on the top of the workbench 1. The second fixed block 15 is a disc, and the second fixed block 15 is located directly above the mold placement opening 14.

[0024] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0025] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0026] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A polyethylene film biaxial stretching machine, comprising a workbench (1), characterized in that: The outer surface of the workbench (1) is provided with four sliding openings (10) distributed in a cross shape, and sliding slots (16) are provided on both sides of the four sliding openings (10). The top of the workbench (1) is fixedly connected with two symmetrical connecting blocks (2), and a first fixing block (3) is fixedly connected between the top ends of the two connecting blocks (2), and the internal thread of the first fixing block (3) is inserted with a first screw rod (6), and the top of the first screw rod (6) is fixedly connected with a knob (4), and the bottom of the first fixing block (3) is fixedly connected with a first screw rod (6). There are two symmetrical positioning connection columns (5), and the bottoms of the two positioning connection columns (5) are fixedly connected to a second fixed block (15), and the outer surface of the first screw (6) is threadedly sleeved with a lifting plate (7), and the four sides of the lifting plate (7) are all provided with notches, and the insides of the four notches are rotatably connected to the first rotating shaft (8), the outer surfaces of the four first rotating shafts (8) are all fixedly sleeved with a first rotating block (9), and the bottom ends of the four first rotating blocks (9) are all provided with openings (11), and the four The bottom end of the first rotating block (9) is rotatably connected with a second rotating shaft (18), and the two ends of the four second rotating shafts (18) are respectively slidably connected to the inside of the two sliding slots (16) on the same side, and the two ends of the four second rotating shafts (18) are fixed with a card block (17), and the eight card blocks (17) are respectively slidably connected to the inside of the eight sliding slots (16), and the center of the workbench (1) is provided with a mold placement opening (14), and the outer surface of the four sliding openings (10) on one side of the mold placement opening (14) is A stretching square piece (13) is slidably inserted, and one end of each of the four stretching square pieces (13) is fixedly connected to a sleeve block (12), and the four sleeve blocks (12) are movably sleeved on the outer surfaces of four second rotating shafts (18), and the other end of each of the four stretching square pieces (13) is provided with a U-shaped opening, and the top of each of the four U-shaped openings is threadedly inserted with a second screw rod (20), and the top of the second screw rod (20) is fixedly connected to a second rotating block (19), and the bottom end of the second screw rod (20) is rotatably connected to a clamping piece (22).

2. A polyethylene film biaxial stretching machine according to claim 1, characterized in that: The bottom end of the first screw (6) is threadedly inserted into the outer surface of the lifting plate (7), and the bottoms of the two positioning connecting columns (5) are slidably inserted into the outer surface of the lifting plate (7), and the lifting plate (7) is located directly above the mold placement port (14).

3. The polyethylene film biaxial stretching machine according to claim 1, characterized in that: The clamping piece (22) is slidably arranged inside the U-shaped opening, and the clamping piece (22) is a square block, and one side of the clamping piece (22) is in contact with one side of the U-shaped opening, and a plurality of protrusions (21) are fixed to the bottom of the second screw (20).

4. The polyethylene film biaxial stretching machine according to claim 1, characterized in that: The four sleeve blocks (12) are respectively movably sleeved inside the four openings (11) on the four second rotating shafts (18), and the four sleeve blocks (12) are respectively slidably arranged inside the four sliding openings (10).

5. The polyethylene film biaxial stretching machine according to claim 1, characterized in that: The connecting block (2) is L-shaped, and the bottom ends of the two connecting blocks (2) are respectively fixed to the outsides of the two sliding openings (10) on the top of the workbench (1); the second fixing block (15) is a disc, and the second fixing block (15) is located directly above the mold placement opening (14).

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