Preparation device of food-grade low-pressure polyethylene uniformly blown film

Abstract

The utility model relates to the technical field of blown film processing, in particular to a preparation device of a food-grade low-pressure polyethylene uniform blown film, which comprises a blow molding die head, a forming die cover is mounted at the top of the blow molding die head, and an arc-shaped clamping groove is formed in the bottom of an outer ring of the forming die cover. An adjustable air entraining machine assembly is mounted at the top of the blow molding die head, and a dismounting positioning assembly is mounted at the top of the surface of the blow molding die head in a penetrating manner. The adjustable air entraining machine assembly is arranged, so that the adjustable air entraining machine has the advantage of adjusting the air volume, the air exhaust space can be adjusted according to the overlap ratio of the upper movable shell and the lower movable shell, and the processing requirements of polyethylene plastic films of different specifications can be well met; by arranging the dismounting and mounting positioning assembly and the arc-shaped clamping groove, the forming die cover has the advantage of accurate positioning, the clamping roller can be matched with the arc-shaped clamping groove, the forming die cover can be positioned and mounted, the extending mounting depth of the forming die cover is ensured, additional electrical equipment does not need to be matched, and the use cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of film blowing processing, in particular to a preparation device for a food-grade low-pressure polyethylene uniform blown film. Background Art

[0002] Film blowing is a plastic processing method that refers to a plastic processing technology that heats and melts plastic particles and then blows them into a film. It usually involves extruding a polymer into a tubular film blank, inflating the tube to the required thickness using high-pressure air under a good melt flow state, and then cooling and shaping it into a film.

[0003] After searching, the patent number is CN216914814U, and the name is a utility model of a device for preparing a food-grade low-pressure polyethylene uniform blown film, including a bottom plate. Through research and analysis, it is found that although it is easy to adjust according to different sizes of film openings, it still has the following disadvantages to a certain extent.

[0004] For example, the device adapts to the processing needs of different film barrels by moving the clamping plate and adopts threaded transmission for adjustment. Although it ensures positioning stability, it cannot guarantee the installation depth of the die head. There are differences in the installation positions of the die heads, the clamping accuracy is general, and there are air-permeable gaps between multiple clamps, which affects the actual film blowing processing. At the same time, it does not have the function of adjusting the air volume and cannot adapt well to the film blowing needs of polyethylene plastic films of different specifications. In order to solve the above technical problems, we have designed a preparation device for food-grade low-pressure polyethylene uniform blown film. Utility Model Content

[0005] The purpose of the utility model is to provide a preparation device for food-grade low-pressure polyethylene uniform blown film, which has the advantages of precise positioning and air volume adjustment, and solves the problems that the device cannot ensure the installation depth of the die head, there are differences in the installation position of the die head, the clamping accuracy is general, and there are air-permeable gaps between multiple clamping parts, which affects the actual film blowing process. At the same time, it does not have the function of adjusting the air volume and cannot well adapt to the needs of polyethylene plastic film blowing of different specifications.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for preparing food-grade low-pressure polyethylene uniform blown film, comprising a blow molding die head, a molding die cover is installed on the top of the blow molding die head, an arc-shaped groove is opened at the bottom of the outer ring of the molding die cover, an adjustable air bleeder assembly is installed on the top of the blow molding die head, and a disassembly and assembly positioning assembly is installed through the top of the surface of the blow molding die head.

[0007] Preferably, the adjustable air bleeder assembly includes vents and fixed empty rings, the vents are multiple in number and vertically penetrate the blow molding die, the bottom of the fixed empty ring is fixedly connected to the connection point of the blow molding die, and the inner cavity of the fixed empty ring is connected to the inner cavity of the vents.

[0008] Preferably, a movable shell is provided on the top movable sleeve of the fixed hollow ring surface, and ventilation holes are provided on the tops of the movable shell and the fixed hollow ring, and a driving handle is fixedly connected to the right side of the top of the movable shell.

[0009] Preferably, the disassembly and assembly positioning component comprises a circular hole, the circular hole is provided on the outer ring of the blow molding die, the inner cavity of the circular hole is provided with a bearing groove, the inner cavity of the bearing groove is provided with a displacement groove, and the displacement groove is connected with the inner cavity of the blow molding die.

[0010] Preferably, a connecting rod is slidably installed through the inner cavity of the circular hole, a spring is sleeved on the surface of the connecting rod, and a pressing block is fixedly connected to one end of the connecting rod and located in the inner cavity of the bearing groove.

[0011] Preferably, one end of the spring is fixedly connected to the inner wall of the circular hole, and the other end of the spring is fixedly connected to the surface of the pressing block, and the surface of the pressing block is in sliding contact with the inner wall of the bearing groove.

[0012] Preferably, a positioning shaft is vertically installed in the inner cavity of the displacement groove, a clamping roller is movably sleeved on the surface of the positioning shaft, and an inclined groove is provided on the surface of the pressure block and on one side close to the clamping roller.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model has the advantage of adjusting the air volume by setting an adjustable air induced fan assembly, which can drive the movable shell to rotate, so that the air holes on the movable shell and the air holes on the fixed hollow ring are staggered and overlapped. According to the overlap degree of the upper and lower movable shells, the gas discharge space can be adjusted, which can well adapt to the processing requirements of polyethylene plastic films of different specifications;

[0015] The utility model has the advantage of precise positioning by providing a disassembly and assembly positioning component and an arc-shaped slot. The mounting roller and the arc-shaped slot can cooperate to position and install the forming mold cover to ensure that the forming mold cover is inserted into the installation depth. At the same time, the staff can also disassemble and assemble the forming mold cover conveniently without the need for additional electrical equipment. The use cost is low and it better meets the actual needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a bottom-up stereogram of the structure of the utility model;

[0018] Figure 3 It is a sectional stereoscopic diagram of the structure of the utility model;

[0019] Figure 4 It is a three-dimensional schematic diagram of the blow molding die head and the disassembly and assembly positioning components of the utility model when they are installed;

[0020] Figure 5 For this utility model Figure 4 A is an enlarged schematic diagram.

[0021] In the figure: 1. Blow molding die head; 2. Forming mold cover; 3. Adjustable air bleeder assembly; 31. Fixed empty ring; 32. Movable shell; 33. Air vent; 34. Driving handle; 35. Air vent; 4. Disassembly and assembly positioning assembly; 41. Positioning shaft; 42. Clamping roller; 43. Displacement groove; 44. Inclined groove; 45. Pressure block; 46. Spring; 47. Round hole; 48. Connecting rod; 49. Load-bearing groove; 5. Arc-shaped clamping groove. DETAILED DESCRIPTION

[0022] See also Figure 1-Figure 5 A preparation device for a food-grade low-pressure polyethylene uniform blown film comprises a blow molding die head 1, a molding die cover 2 is installed on the top of the blow molding die head 1, an arc-shaped card slot 5 is opened at the bottom of the outer ring of the molding die cover 2, an adjustable air induced machine component 3 is installed on the top of the blow molding die head 1, and a disassembly and assembly positioning component 4 is installed through the top of the surface of the blow molding die head 1;

[0023] See also Figure 1 and Figure 3 The adjustable air bleeder assembly 3 includes a vent hole 35 and a fixed hollow ring 31. The vent holes 35 are multiple in number and vertically penetrate the blow molding die head 1. The bottom of the fixed hollow ring 31 is fixedly connected to the connection of the blow molding die head 1. The inner cavity of the fixed hollow ring 31 is connected to the inner cavity of the vent hole 35.

[0024] See also Figure 1 and Figure 3 A movable shell 32 is provided on the top of the fixed hollow ring 31. Air holes 33 are provided on the top of the movable shell 32 and the fixed hollow ring 31. A driving handle 34 is fixedly connected to the right side of the top of the movable shell 32.

[0025] See also Figure 3 , Figure 4 and Figure 5 The disassembly and assembly positioning assembly 4 includes a circular hole 47, which is provided on the outer ring of the blow molding die 1, and the inner cavity of the circular hole 47 is provided with a bearing groove 49, and the inner cavity of the bearing groove 49 is provided with a displacement groove 43, and the displacement groove 43 is connected with the inner cavity of the blow molding die 1;

[0026] See also Figure 3 , Figure 4 and Figure 5 A connecting rod 48 is slidably installed through the inner cavity of the circular hole 47, a spring 46 is sleeved on the surface of the connecting rod 48, and a pressing block 45 is fixedly connected to one end of the connecting rod 48 and located in the inner cavity of the bearing groove 49;

[0027] See also Figure 3 , Figure 4 and Figure 5 One end of the spring 46 is fixedly connected to the inner wall of the circular hole 47, and the other end of the spring 46 is fixedly connected to the surface of the pressing block 45, and the surface of the pressing block 45 is in sliding contact with the inner wall of the bearing groove 49;

[0028] See also Figure 3 , Figure 4 and Figure 5 A positioning shaft 41 is vertically installed in the inner cavity of the displacement groove 43, a clamping roller 42 is movably sleeved on the surface of the positioning shaft 41, and an inclined groove 44 is provided on the surface of the pressing block 45 and close to the clamping roller 42;

[0029] The bottom of the surface of the molding mold cover 2 is designed to be inclined, so that when the molding mold cover 2 moves down and contacts the clamping roller 42, the clamping roller 42 automatically moves outward;

[0030] The number of disassembly and assembly positioning components 4 is three;

[0031] The clamping roller 42 is adapted to the arc-shaped clamping slot 5;

[0032] Auxiliary grooves are provided at the top and bottom of the inner cavity of the displacement groove 43, and the auxiliary grooves are capable of meeting the displacement space requirements of the protruding clamping roller 42;

[0033] The surface of the movable shell 32 is movably connected to the connection point of the fixed hollow ring 31 and is sealed;

[0034] The outer end of the connecting rod 48 is fixedly connected with a pull ring, and the pull ring is convenient for the staff to manually pull the connecting rod 48 to move outward;

[0035] By providing the forming mold cover 2, the material transmitted by the blow molding die head 1 can be continuously guided, and by providing the fixed empty ring 31, the plurality of vents 35 can be covered, so that the gas entering the vents 35 is homogenized and ejected from the vents 33;

[0036] By providing the movable shell 32, it can be covered and installed on the fixed hollow ring 31 and can be flexibly rotated. By providing the air holes 33, the gas can be sprayed upward when the upper and lower air holes 33 overlap. When the upper and lower air holes 33 are staggered, dust and impurities are prevented from falling into the air holes 35 and causing air duct blockage.

[0037] By providing the driving handle 34, it is convenient for the staff to drive the movable shell 32 to rotate, and by providing the positioning shaft 41, the clamping roller 42 can be positioned and the rotation requirement of the clamping roller 42 can be met;

[0038] By providing the clamping roller 42 and the arc-shaped clamping groove 5, the forming mold cover 2 can be prevented from moving up and down randomly in the installed state. By providing the displacement groove 43, the displacement space requirement of the clamping roller 42 can be met. By providing the inclined groove 44, the clamping roller 42 can be pushed to automatically move inward when it moves inward and contacts the clamping roller 42.

[0039] By setting a spring 46, it can be connected with the pressure block 45 and the circular hole 47, thereby achieving the purpose of elastic support for the pressure block 45 and preventing the pressure block 45 from moving randomly. By setting a connecting rod 48, the installation requirements of the spring 46 can be met. By setting a bearing groove 49, the displacement space requirements of the pressure block 45 can be met.

[0040] When in use, all components are in the initial installation state. First, the angle of the molding mold cover 2 is adjusted so that the arc-shaped slot 5 and the mounting roller 42 are aligned vertically, and then the molding mold cover 2 is moved down and placed in the blow molding die head 1. The upper inclined surface of the molding mold cover 2 first contacts the mounting roller 42, so that the mounting roller 42 is squeezed and automatically moves outward in the displacement groove 43. The displacement of the mounting roller 42 contacts the inclined groove 44, which makes the pressing block 45 move outward in the bearing groove 49, and the spring 46 is compressed until the molding mold cover 2 moves down to the arc-shaped slot 5 and the mounting roller 42 are in the same plane. Under the elastic support of the spring 46, the pressing block 45 pushes the mounting roller 42 to reset its displacement. The clamping roller 42 enters the arc-shaped slot 5 to ensure the installation stability of the forming mold cover 2, and there is no need for the staff to manually observe the installation depth of the forming mold cover 2. During the disassembly operation, the staff only needs to forcefully rotate the forming mold cover 2. Since the arc-shaped slot 5 is an arc-shaped design, as the forming mold cover 2 rotates, the clamping roller 42 is squeezed out of the arc-shaped slot 5. The overall operation is quick and convenient. According to the actual specifications of the polyethylene plastic film, the staff can hold the driving handle 34 to drive the movable shell 32 to rotate, change the overlapping area of ​​the air hole 33 on the movable shell 32 and the air hole 33 on the fixed empty ring 31, so as to adjust the unit air volume discharged from the air hole 33, so as to well adapt to the requirements of polyethylene plastic film blowing processing of different specifications.

[0041] To sum up: the preparation device of food-grade low-pressure polyethylene uniform blown film, by setting an adjustable air entrainment fan component 3, a disassembly and assembly positioning component 4 and an arc-shaped slot 5, solves the problem that the device cannot ensure the installation depth of the die head, there are differences in the installation position of the die head, the clamping accuracy is general, and there are air-permeable gaps between multiple clamping parts, which affects the actual film blowing process. At the same time, it does not have the function of adjusting the air volume and cannot well adapt to the needs of polyethylene plastic film blowing of different specifications.

Claims

1. A device for preparing a uniform food-grade low-pressure polyethylene blown film, comprising a blow molding die head (1), characterized in that: A molding die cover (2) is installed on the top of the blow molding die head (1), an arc-shaped slot (5) is provided at the bottom of the outer ring of the molding die cover (2), an adjustable air bleeder assembly (3) is installed on the top of the blow molding die head (1), and a disassembly and assembly positioning assembly (4) is installed through the top of the surface of the blow molding die head (1).

2. The device for preparing a food-grade low-pressure polyethylene uniform blown film according to claim 1, characterized in that: The adjustable air bleeder assembly (3) comprises a vent hole (35) and a fixed hollow ring (31); the vent holes (35) are multiple in number and are vertically penetrated through the blow molding die (1); the bottom of the fixed hollow ring (31) is fixedly connected to the connection point of the blow molding die (1); and the inner cavity of the fixed hollow ring (31) is in communication with the inner cavity of the vent hole (35).

3. The device for preparing a food-grade low-pressure polyethylene uniform blown film according to claim 2, characterized in that: A movable shell (32) is movably sleeved on the top of the surface of the fixed hollow ring (31), and ventilation holes (33) are provided on the tops of the movable shell (32) and the fixed hollow ring (31), and a driving handle (34) is fixedly connected to the right side of the top of the movable shell (32).

4. The device for preparing a food-grade low-pressure polyethylene uniform blown film according to claim 1, characterized in that: The disassembly and assembly positioning component (4) comprises a circular hole (47), the circular hole (47) being provided on the outer ring of the blow moulding die (1), the inner cavity of the circular hole (47) being provided with a bearing groove (49), the inner cavity of the bearing groove (49) being provided with a displacement groove (43), and the displacement groove (43) being in communication with the inner cavity of the blow moulding die (1).

5. The device for preparing a food-grade low-pressure polyethylene uniform blown film according to claim 4, characterized in that: A connecting rod (48) is slidably mounted through the inner cavity of the circular hole (47), a spring (46) is sleeved on the surface of the connecting rod (48), and a pressing block (45) is fixedly connected to one end of the connecting rod (48) and located in the inner cavity of the bearing groove (49).

6. The device for preparing a food-grade low-pressure polyethylene uniform blown film according to claim 5, characterized in that: One end of the spring (46) is fixedly connected to the inner wall of the circular hole (47), and the other end of the spring (46) is fixedly connected to the surface of the pressing block (45), and the surface of the pressing block (45) is in sliding contact with the inner wall of the bearing groove (49).

7. The device for preparing a food-grade low-pressure polyethylene uniform blown film according to claim 6, characterized in that: A positioning shaft (41) is vertically mounted in the inner cavity of the displacement groove (43), a clamping roller (42) is movably sleeved on the surface of the positioning shaft (41), and an inclined groove (44) is provided on the surface of the pressure block (45) and on a side close to the clamping roller (42).

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