Protective film automatic extrusion device capable of screening

Abstract

The utility model discloses an automatic protective film extrusion device capable of screening, and relates to the technical field of film blowing. The device comprises a base, the top of the base is fixedly connected with a protective film extrusion barrel, the interior of the protective film extrusion barrel is rotationally connected with an extrusion screw, and one end of the extrusion screw is fixedly connected with the rotating end of a first motor fixedly arranged at one end of the protective film extrusion barrel. According to the plastic particle mixing device, plastic particles for extruding a protective film can be screened through the arranged screening net, so that the particle sizes of the plastic particles entering the mixing barrel are more uniform, the situation that the plastic particles with larger particle sizes cannot be completely fused is avoided, and the quality of the protective film can be better guaranteed; the plastic particles on the screening net can be stirred, the screening net is prevented from being blocked, the plastic particles can be mixed and melted before the plastic particles enter the protective film extrusion barrel through the arranged stirring blades and the arranged electric heating layer, and the quality of the protective film can be further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of film blowing, and particularly relates to an automatic extrusion device for protective films capable of performing screening. Background Art

[0002] The film blowing machine heats and melts plastic particles and then blows them into film. Dry polyethylene particles are added to the lower hopper, and the particles enter the screw from the hopper by their own weight. When the particles come into contact with the bevel of the thread, the rotating bevel surface generates a thrust perpendicular to the bevel surface on the plastic, pushing the plastic particles forward. During the pushing process, due to the friction between the plastic and the screw, the plastic and the barrel, and the collision and friction between the particles, and also due to the external heating of the barrel, the molten plastic is filtered through the machine head to remove impurities and comes out from the die head. It is cooled by the air ring, inflated, and passed through the herringbone plate, traction roller, and winding to roll the finished film into a tube. After searching, the patent with application number 201921584271.0 discloses an extrusion blown film device for PE protective film, including a first box body, a first heating block is fixedly installed inside the first box body, a feed pipe is provided on the top of the first box body, a sealing groove is opened inside the feed pipe, a sealing plate is slidably connected inside the sealing groove, the left side of the sealing plate extends to the outside of the feed pipe, and a pretreatment structure is provided on the top of the inside of the first box body.

[0003] However, during actual use, the applicant found that there was a lack of a screening structure for plastic particles, which resulted in the plastic particles being mixed with plastic particles of larger particle size. As a result, during the processing, the size of the pellets was not uniform enough, and some large plastic particles that were not completely melted would exist in the molten plastic, thereby reducing the quality of the protective film. In view of this, we propose an automatic extrusion device for protective film that can perform screening. Utility Model Content

[0004] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0005] The utility model discloses an automatic extrusion device for a protective film capable of screening, comprising a base, the top of the base is fixedly connected with a protective film extrusion cylinder, the interior of the protective film extrusion cylinder is rotatably connected with an extrusion screw, one end of the extrusion screw is fixedly connected to the rotating end of a first motor fixedly installed at one end of the protective film extrusion cylinder, the other end of the protective film extrusion cylinder is provided with a die head, the top of the base is fixedly connected with a support frame, the support frame above the protective film extrusion cylinder is fixedly connected with a mixing cylinder, the lower end of the mixing cylinder is communicated with the interior of the protective film extrusion cylinder through a connecting pipe, a screening net is fixedly connected to the inner wall of the upper part of the mixing cylinder, a second motor is fixedly connected to the support frame above the mixing cylinder, a stirring rod is fixedly connected to the rotating end of the second motor, the lower end of the stirring rod passes through the middle part of the screening net, and a stirring blade is fixedly arranged on the peripheral side wall of the lower end of the stirring rod, and a material shifting frame is sleeved and fixed on the stirring rod above the screening net.

[0006] Preferably, a heating coil is wound inside the protective film extrusion cylinder.

[0007] Preferably, an electric heating layer is fixedly provided on the inner wall of the lower part of the mixing cylinder.

[0008] Preferably, the upper end of the connecting pipe is fixedly connected to the bottom of the mixing cylinder, and the lower end of the connecting pipe is fixedly connected to the protective film extrusion cylinder, and a discharge valve is sleeved and fixed on the connecting pipe.

[0009] Preferably, a plurality of stirring blades are evenly arranged at the lower end of the stirring rod.

[0010] Preferably, the material diverter frame slides along the top of the screening net.

[0011] The utility model has the following beneficial effects:

[0012] The utility model discloses an automatic extrusion device for protective film capable of screening. The screening net is arranged to screen the plastic particles used for extruding the protective film, so that the particle size of the plastic particles entering the mixing barrel is more uniform, and it is prevented that the plastic particles with larger particle size cannot be completely melted, so that the quality of the protective film can be better guaranteed. The material shifting rack is arranged to shift the plastic particles on the screening net to prevent the plastic particles with larger particle size from blocking the screening net. The stirring blades and the electric heating layer are arranged to mix and heat and melt the plastic particles before the plastic particles enter the protective film extrusion barrel, so that the quality of the protective film can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is a schematic diagram of the external structure of an automatic extrusion device for protective film capable of screening according to the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of an automatic extrusion device for protective film capable of screening according to the utility model;

[0016] Figure 3 The utility model is a protective film automatic extrusion device capable of screening Figure 2 A magnified view of the structure in the middle.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0018] 1. Base; 2. Support frame; 3. Protective film extrusion barrel; 4. First motor; 5. Die head; 6. Second motor; 7. Material shifting rack; 8. Screening net; 9. Mixing barrel; 10. Connecting pipe; 11. Discharge valve; 12. Stirring rod; 121. Stirring blade; 13. Extrusion screw; 14. Heating coil; 15. Electric heating layer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 As shown, the utility model provides a technical solution:

[0021] A protective film automatic extrusion device capable of screening comprises a base 1, a support frame 2 is fixedly connected to the top of the base 1, a mixing cylinder 9 is fixedly connected to the support frame 2 above the protective film extrusion cylinder 3, an electric heating layer 15 is fixedly arranged in the inner wall of the lower part of the mixing cylinder 9, a screening net 8 is fixedly connected to the inner wall of the upper part of the mixing cylinder 9, and the size of the plastic particles can be screened so that the size of the particles entering the mixing cylinder 9 can be more uniform, thereby preventing the plastic particles with larger particle sizes from being unable to melt completely, thereby better ensuring the quality of the protective film, a second motor 6 is fixedly connected to the support frame 2 above the mixing cylinder 9, and the second motor 6 and the electric heating layer 15 are controlled by an external controller, which will not be described in detail here, a stirring rod 12 is fixedly connected to the rotating end of the second motor 6, and a material shifting rack 7 is sleeved and fixed on the stirring rod 12 above the screening net 8, and the material shifting rack 7 is along the The top of the screening net 8 slides, and the material shifting rack 7 is driven to rotate by the stirring rod 12, so that the plastic particles on the top of the screening net 8 can be shifted to prevent the screening net 8 from being easily blocked, and then the plastic particles for protective film extrusion processing can be screened through the screening net 8. When in use, the plastic particles for protective film extrusion are put into the screening net 8, and the larger plastic particles can be screened through the screening net 8. The second motor 6 is driven to rotate by the external controller, and the rotation of the second motor 6 can drive the stirring rod 12 to rotate. The rotation of the stirring rod 12 can drive the material shifting rack 7 to rotate. The rotation of the material shifting rack 7 can shift the plastic particles at the bottom of the screening net 8 to prevent the larger plastic particles from blocking the screen mesh. The screened plastic particles fall into the mixing drum 9, and the inner wall of the mixing drum 9 can be heated by the electric heating layer 15 to heat the plastic particles in the mixing drum 9.

[0022] A protective film extrusion cylinder 3 is fixedly connected to the top of the base 1, a heating coil 14 is wound inside the protective film extrusion cylinder 3, an extrusion screw 13 is rotatably connected inside the protective film extrusion cylinder 3, one end of the extrusion screw 13 is fixedly connected to the rotating end of the first motor 4 fixedly installed at one end of the protective film extrusion cylinder 3, a die head 5 is provided at the other end of the protective film extrusion cylinder 3, the lower end of the mixing cylinder 9 is connected to the inside of the protective film extrusion cylinder 3 through a connecting pipe 10, the upper end of the connecting pipe 10 is fixedly connected to the bottom of the mixing cylinder 9, and the lower end of the connecting pipe 10 is fixedly connected to the protective film extrusion cylinder 3, a discharge valve 11 is fixedly sleeved on the connecting pipe 10, the first motor 4, the discharge valve 11 and the heating coil 14 are also controlled by an external controller, which will not be described in detail here, the lower end of the stirring rod 12 passes through the middle of the screening net 8, and the lower end of the stirring rod 12 A stirring blade 121 is fixedly provided on the peripheral side wall, and a plurality of stirring blades 121 are evenly provided at the lower end of the stirring rod 12. The stirring blades 121 can be used to stir and mix the plastic particles in the mixing barrel 9. During the rotation of the stirring rod 12, the stirring blades 121 can be driven to rotate together, and the stirring blades 121 can be used to stir and mix the plastic particles inside the mixing barrel 9, so that the raw material particles can be evenly mixed. After mixing, the discharge valve 11 is opened, and the molten plastic can be introduced into the protective film extrusion barrel 3 through the connecting pipe 10. The extrusion screw 13 is driven to rotate by the first motor 4, so that the protective film can be extruded from the die head 5. In this process, the interior of the protective film extrusion barrel 3 can be heated by energizing the heating coil 14 to prevent the molten plastic inside the protective film extrusion barrel 3 from solidifying due to the low temperature.

[0023] Working principle: When in use, the plastic particles used for extruding the protective film are put into the screening net 8, and the larger plastic particles can be screened through the screening net 8, and the second motor 6 is driven to rotate by the external controller, and the rotation of the second motor 6 can drive the stirring rod 12 to rotate, and the rotation of the stirring rod 12 can drive the material rack 7 to rotate, and the rotation of the material rack 7 can move the plastic particles at the bottom of the screening net 8 to prevent the larger plastic particles from blocking the mesh of the screen. The screened plastic particles fall into the mixing drum 9, and the inner wall of the mixing drum 9 can be heated by the electric heating layer 15 to heat the plastic particles in the mixing drum 9 to melt them, and then the mixing drum 9 is stirred. During the rotation of the rod 12, the stirring blade 121 can be driven to rotate together, and the stirring blade 121 can be used to stir and mix the plastic particles inside the mixing barrel 9, so that the raw material particles can be evenly mixed. After mixing, the discharge valve 11 is opened, and the molten plastic can be introduced into the protective film extrusion barrel 3 through the connecting pipe 10. By driving the first motor 4 to drive the extrusion screw 13 to rotate, the protective film can be extruded from the die head 5. In this process, by energizing the heating coil 14, the inside of the protective film extrusion barrel 3 can be heated to prevent the molten plastic inside the protective film extrusion barrel 3 from solidifying due to the low temperature.

[0024] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0025] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions described in the aforementioned embodiments and any equivalent replacement of some of the technical features therein are within the protection scope of the present invention.

Claims

1. A protective film automatic extrusion device capable of screening, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a protective film extrusion cylinder (3), the interior of the protective film extrusion cylinder (3) is rotatably connected to an extrusion screw (13), one end of the extrusion screw (13) is fixedly connected to the rotating end of a first motor (4) fixedly installed at one end of the protective film extrusion cylinder (3), the other end of the protective film extrusion cylinder (3) is provided with a die head (5), the top of the base (1) is fixedly connected to a support frame (2), the support frame (2) above the protective film extrusion cylinder (3) is fixedly connected to a mixing cylinder (9), the lower end of the mixing cylinder (9) is connected to a The connecting tube (10) is connected to the interior of the protective film extrusion cylinder (3); a screening net (8) is fixedly connected to the inner wall of the upper part of the mixing cylinder (9); a second motor (6) is fixedly connected to the support frame (2) above the mixing cylinder (9); a stirring rod (12) is fixedly connected to the rotating end of the second motor (6); the lower end of the stirring rod (12) passes through the middle of the screening net (8); and stirring blades (121) are fixedly provided on the peripheral side wall of the lower end of the stirring rod (12); and a material dispensing frame (7) is sleeved and fixedly connected to the stirring rod (12) above the screening net (8).

2. The automatic extrusion device for protective film capable of screening according to claim 1, characterized in that: A heating coil (14) is wound inside the protective film extrusion cylinder (3).

3. The automatic extrusion device for protective film capable of screening according to claim 1, characterized in that: An electric heating layer (15) is fixedly arranged on the inner wall of the lower part of the mixing cylinder (9).

4. The automatic extrusion device for protective film capable of screening according to claim 1, characterized in that: The upper end of the connecting pipe (10) is fixedly connected to the bottom of the mixing cylinder (9), and the lower end of the connecting pipe (10) is fixedly connected to the protective film extrusion cylinder (3). A discharge valve (11) is sleeved and fixed on the connecting pipe (10).

5. The automatic extrusion device for protective film capable of screening according to claim 1, characterized in that: A plurality of stirring blades (121) are evenly arranged at the lower end of the stirring rod (12).

6. The automatic extrusion device for protective film capable of screening according to claim 1, characterized in that: The material shifting frame (7) slides along the top of the screening net (8).

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