Plastic film blowing machine

Abstract

The utility model relates to the technical field of plastic film blowing, and discloses a plastic film blowing machine which comprises a frame, an air pump is fixedly connected to the inner bottom wall of the frame, one end of the air pump is communicated with an exhaust pipe, the other end of the air pump is communicated with an air delivery pipe, and the outer wall of the air delivery pipe is fixedly connected with a machine body. The tail end of the exhaust pipe communicates with a cooling box, air inlet holes are formed in the front end and the rear end of the left side of the cooling box correspondingly, a drawer is slidably connected to the lower end of the front side of the cooling box, and an anti-scraping flattening mechanism is installed in the frame and used for conveying and flattening the plastic film. According to the plastic film cooling device, the air pump pumps cold air in the cooling box through the air suction pipe and then conveys the cold air to the interior of a plastic film through the air conveying pipe, the air inlet holes are used for keeping circulation of air in the cooling box, refrigeration objects such as liquid nitrogen and dry ice are placed in the drawers, and therefore the effect that the plastic film is cooled in the plastic film cooling device is achieved.

Description

Technical Field

[0001] This utility model relates to the field of plastic film blowing technology, and in particular to a plastic film blowing machine. Background Technology

[0002] A plastic film blowing machine is a specialized piece of machinery used to produce plastic film. It mainly consists of an extruder, die head, blowing device, cooling system, traction device, and winding device. It is widely used in agricultural covering, packaging, construction, and electronics, and is an indispensable piece of equipment in the modern plastics processing industry.

[0003] A search revealed Chinese Patent Publication No. CN112428572A, which discloses a plastic film blowing machine, including an extrusion assembly, a blowing assembly, an air supply assembly, an electrical control cabinet, and a PLC controller. By setting up the air supply assembly, the PLC controller controls the air pump to operate during use, supplying gas to the blowing tube through an air delivery pipe. A flow regulating valve adjusts the gas flow rate supplied by the air pump to the blowing tube, facilitating control of the blowing pressure, ensuring its stability, and improving the blowing quality. By setting up the extrusion assembly, material enters the extrusion box from the feed pipe. The PLC controller controls the heating plate and extrusion motor to operate. The heating plate heats the material in the extrusion box, and the extrusion motor drives the extrusion rollers in the extrusion box to rotate, extruding the molten material through the extrusion head, facilitating subsequent blowing operations. The insulation layer retains the heat generated by the heating plate, preventing heat loss and improving the heating efficiency. However, most existing plastic film blowing machines use external cooling to cool the plastic film, which, due to the high-pressure gas inside the plastic film, results in less than ideal cooling. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a plastic film blowing machine, which aims to improve the problem that most existing plastic film blowing machines use external cooling to cool the plastic film, and the cooling effect is not ideal due to the presence of high-pressure gas inside the plastic film.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a plastic film blowing machine, comprising a frame, an air pump fixedly connected to the inner bottom wall of the frame, one end of the air pump connected to an air extraction pipe, the other end of the air pump connected to an air delivery pipe, an organism fixedly connected to the outer wall of the air delivery pipe, a cooling box connected to the end of the air extraction pipe, air inlets being provided at both the front and rear ends of the left side of the cooling box, a drawer slidably connected to the lower front end of the cooling box, and an anti-scratch flattening mechanism installed inside the frame, the anti-scratch flattening mechanism being used for conveying and flattening the plastic film.

[0006] The above technical solution involves an air pump drawing cold air from the cooling chamber through an air extraction pipe. The air pump then delivers the cooling air to the plastic film blown out of the machine body through an air supply pipe connected to the other end. Two air inlets are opened on the left side of the cooling chamber to maintain air circulation. Liquid nitrogen and dry ice are placed in the drawer inside the cooling chamber to maintain the low temperature inside the cooling chamber.

[0007] As a further description of the above technical solution:

[0008] The anti-scratch flattening mechanism includes a motor. The bottom of the motor is fixedly connected to the right end of the inner middle of the frame. Multiple flattening rods are equidistantly rotatably connected to the inner middle of the frame. The right end of the flattening rod at the lower rear end is fixedly connected to the output end of the motor. The right end of the outer wall of the two lower flattening rods is fixedly connected to a drive sprocket. The right end of the outer wall of the two upper flattening rods is fixedly connected to a driven sprocket. The two drive sprockets are connected to the corresponding driven sprockets through corresponding chains. The left end of the outer wall of the two upper flattening rods is fixedly connected to a gear.

[0009] The above technical solution works as follows: the motor powers the lower rear end pressing rod to rotate. This rotation drives the drive sprocket fixed to its right side to rotate. The drive sprocket's rotation, in turn, drives the driven sprocket to rotate synchronously via a chain. The driven sprocket's rotation then drives the upper rear end pressing rod to rotate synchronously. This rotation of the upper rear end pressing rod drives the gear fixed to its left side to rotate synchronously. Simultaneously, the gear on the upper rear end pressing rod meshes with the gear on the left side of the upper front pressing rod, causing it to rotate synchronously. This, in turn, drives the driven sprocket on its right side to rotate synchronously. The rotation of this driven sprocket, via a corresponding chain, drives the corresponding drive sprocket to rotate synchronously, thus driving multiple pressing rods to rotate synchronously. The rotation of these multiple pressing rods then flattens and compacts the plastic film.

[0010] As a further description of the above technical solution:

[0011] A fixing frame is fixedly connected to the inner side of each of the two air inlets, and a filter screen is fixedly connected to the outer wall of each of the two fixing frames.

[0012] The above technical solution allows for the prevention of foreign objects from entering the cooling chamber by fixing the filter screen inside the air inlet with a mounting bracket.

[0013] As a further description of the above technical solution:

[0014] A fixing ring is fixedly connected to the front side of the drawer, and a pull ring is rotatably connected to the inner side of the fixing ring.

[0015] The above technical solution allows for easy pulling of the drawer by using a fixed ring to secure the pull ring.

[0016] As a further description of the above technical solution:

[0017] A stabilizing frame is fixedly connected to the bottom of the motor, and screws are threaded to the front, rear, left and right ends of the stabilizing frame.

[0018] The above technical solution, which uses a stabilizer secured with screws, can improve the stability of the motor.

[0019] As a further description of the above technical solution:

[0020] A rubber sleeve is fixedly connected to the outer wall of the pull ring, and multiple anti-slip rings are fixedly connected at equal intervals to the outer wall of the rubber sleeve.

[0021] The above technical solution improves the grip of the rubber sleeve fixed to the outside of the pull ring by using multiple anti-slip rings fixed to it.

[0022] As a further description of the above technical solution:

[0023] A hot melt machine is fixedly connected to the rear end of the inner bottom wall of the frame, and a funnel is connected to the top of the hot melt machine.

[0024] The above technical solution improves the material feeding efficiency of the hot melt machine used for melting plastics by using a funnel fixed on it.

[0025] As a further description of the above technical solution:

[0026] X-shaped brackets are installed on both the left and right sides of the frame, and screws are threaded to the four corners of the two X-shaped brackets.

[0027] The above technical solution improves the stability of the X-shaped frame by fixing it to both sides of the frame with screws.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the air pump draws cold air from the cooling box through the air extraction pipe, and then delivers the cold air to the plastic film blown out of the machine body through the air delivery pipe at the other end. The air inlet is used to maintain the air circulation in the cooling box. The drawer contains refrigerants such as liquid nitrogen and dry ice to maintain the low temperature in the cooling box, thereby achieving the effect of cooling the plastic film from the inside.

[0030] 2. In this utility model, the motor drives multiple pressing rods to rotate synchronously through the cooperation of two sets of driving sprockets, chains, driven sprockets and gears. The rotation of the multiple pressing rods flattens and compresses the plastic film, thereby achieving the effect of avoiding scratching the outer wall of the plastic film. Attached Figure Description

[0031] Figure 1 This is a perspective view of a plastic film blowing machine according to the present invention;

[0032] Figure 2 This is a partial exploded view of the structure of a plastic film blowing machine proposed in this utility model;

[0033] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0034] Figure 4 for Figure 2 Enlarged view of point B in the image;

[0035] Figure 5 This is an exploded view of the anti-scratch and flattening mechanism of a plastic film blowing machine proposed in this utility model.

[0036] Legend:

[0037] 1. Frame; 2. Anti-scratch flattening mechanism; 201. Motor; 202. Flattening rod; 203. Drive sprocket; 204. Driven sprocket; 205. Chain; 206. Gear; 3. Air pump; 4. Suction pipe; 5. Air supply pipe; 6. Body; 7. Cooling box; 8. Air inlet; 9. Drawer; 10. Fixing bracket; 11. Filter screen; 12. Fixing ring; 13. Pull ring; 14. Stabilizing bracket; 15. Screw one; 16. Rubber sleeve; 17. Anti-slip ring; 18. Hot melt machine; 19. Funnel; 20. X-shaped frame; 21. Screw two. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 2 , Figure 3 and Figure 4This utility model provides an embodiment of a plastic film blowing machine, comprising a frame 1, an air pump 3 fixedly connected to the inner bottom wall of the frame 1, one end of the air pump 3 connected to an air extraction pipe 4, the air pump 3 drawing cold air through the air extraction pipe 4, the other end of the air pump 3 connected to an air delivery pipe 5, the outer wall of the air delivery pipe 5 fixedly connected to an organ 6, the air pump 3 delivering cold air to the organ 6 through the air delivery pipe 5, the end of the air extraction pipe 4 connected to a cooling box 7, the cooling box 7 having air inlets 8 at both the front and rear ends on the left side, the air inlets 8 being used to maintain the air inside the cooling box 7. Air circulation is provided. A drawer 9 is slidably connected to the lower front side of the cooling box 7. The drawer 9 is used to place cooling materials. An anti-scratch flattening mechanism 2 is installed inside the frame 1. The anti-scratch flattening mechanism 2 is used to convey and flatten the plastic film. A fixing bracket 10 is fixedly connected to the inner side of each of the two air inlets 8. A filter screen 11 is fixedly connected to the outer wall of each of the two fixing brackets 10. The fixing bracket 10 is used to fix the filter screen 11. A fixing ring 12 is fixedly connected to the front side of the drawer 9. A pull ring 13 is rotatably connected to the inner side of the fixing ring 12. The fixing ring 12 is used to fix the pull ring 13.

[0040] Specifically, when the machine body 6 blows the raw material into a film, the air pump 3 will also simultaneously draw cold air from the cooling box 7 through the air extraction pipe 4. Then, the air pump 3 will deliver the cooling to the inside of the plastic film blown out by the machine body 6 through the air supply pipe 5 connected to the other end. Two air inlets 8 are opened on the left side of the cooling box 7 to maintain air circulation. Liquid nitrogen and dry ice are placed in the drawer 9 inside the cooling box 7 to maintain the low temperature inside the cooling box 7. The filter screen 11 fixed in the air inlet 8 by the fixing bracket 10 can prevent foreign objects from entering the cooling box 7. The pull ring 13 fixed by the fixing ring 12 makes it easy to pull out the drawer 9.

[0041] Reference Figure 5 The anti-scratch flattening mechanism 2 includes a motor 201. The bottom of the motor 201 is fixedly connected to the right end of the inner middle of the frame 1. Multiple flattening rods 202 are equidistantly rotatably connected to the inner middle of the frame 1. The motor 201 drives the flattening rods 202 to rotate. The right end of the lower rear flattening rod 202 is fixedly connected to the output end of the motor 201. The right end of the outer wall of the two lower flattening rods 202 is fixedly connected to a drive sprocket 203, and the right end of the outer wall of the two upper flattening rods 202 is fixedly connected to a driven sprocket 204. The driving sprocket 203 is connected to the corresponding driven sprocket 204 via the corresponding chain 205. The driving sprocket 203 drives the driven sprocket 204 to rotate synchronously via the chain 205. Gears 206 are fixedly connected to the left end of the outer wall of the two upper flattening rods 202. The gears 206 drive the two upper flattening rods 202 to rotate synchronously. A stabilizing frame 14 is fixedly connected to the bottom of the motor 201. Screws 15 are threadedly connected to the front, rear, left and right ends of the stabilizing frame 14. Screws 14 are used to fix the stabilizing frame 15.

[0042] Specifically, the power provided by the motor 201 drives the lower rear end pressure bar 202 to rotate. When the lower rear end pressure bar 202 rotates, it drives the drive sprocket 203 fixed to its right side to rotate. When the drive sprocket 203 rotates, it drives the driven sprocket 204 to rotate synchronously through the chain 205. When the driven sprocket 204 rotates, it drives the upper rear end pressure bar 202 fixed to it to rotate synchronously. As the upper rear end pressure bar 202 rotates synchronously, it drives the gear 206 fixed to its left side to rotate synchronously. As the gear 206 rotates, it drives the gear 206 on the left side of the upper front pressing rod 202 to rotate synchronously through meshing. This drives the driven sprocket 204 on the right side of the upper front pressing rod 202 to rotate synchronously. When the driven sprocket 204 rotates, it drives the corresponding driving sprocket 203 to rotate synchronously through the corresponding chain 205. This drives multiple pressing rods 202 to rotate synchronously. The rotation of multiple pressing rods 202 flattens and flattens the plastic film. The stabilizing frame 14, which is fixed by screw 15, can improve the stability of the motor 201.

[0043] Reference Figure 1 , Figure 2 and Figure 4 A rubber sleeve 16 is fixedly connected to the outer wall of the pull ring 13. Multiple anti-slip rings 17 are fixedly connected to the outer wall of the rubber sleeve 16 at equal intervals. The anti-slip rings 17 are used to improve the anti-slip performance of the rubber sleeve 16. A hot melt machine 18 is fixedly connected to the rear end of the inner bottom wall of the frame 1. A funnel 19 is connected to the top of the hot melt machine 18. The funnel 19 is used to improve the material feeding efficiency of the hot melt machine 18. X-shaped frames 20 are installed on both the left and right sides of the frame 1. Screws 21 are threadedly connected to the four corners of the two X-shaped frames 20. Screws 21 are used to fix the X-shaped frames 20.

[0044] Specifically, the rubber sleeve 16 fixed to the outside of the pull ring 13 improves its grip by multiple anti-slip rings 17 fixed to it, the hot melt machine 18 used for melting plastic improves the material feeding efficiency by the funnel 19 fixed to it, and the X-shaped frame 20 fixed to both sides of the frame 1 by screws 21 can improve its stability.

[0045] Working principle: When using a plastic film blowing machine to produce plastic film, the air pump 3 will start synchronously with the machine body 6. While the machine body 6 blows the raw material, the air pump 3 will also simultaneously draw cold air from the cooling box 7 through the air extraction pipe 4. Then, the air pump 3 will deliver the cooling to the inside of the plastic film blown out by the machine body 6 through the air supply pipe 5 connected to the other end. Two air inlets 8 are opened on the left side of the cooling box 7 to maintain air circulation. The drawer 9 inside the cooling box 7 contains refrigerants such as liquid nitrogen and dry ice to maintain the low temperature inside the cooling box 7, thereby achieving the effect of cooling the plastic film from the inside.

[0046] When using a plastic film blowing machine to produce plastic film, the motor 201 installed in the frame 1 is started synchronously. The power provided by the motor 201 drives the lower rear end pressure bar 202 to rotate. When the lower rear end pressure bar 202 rotates, it drives the drive sprocket 203 fixed to its right side to rotate. When the drive sprocket 203 rotates, it drives the driven sprocket 204 to rotate synchronously through the chain 205. When the driven sprocket 204 rotates, it drives the upper rear end pressure bar 202 fixed to it to rotate synchronously. As the upper rear end pressure bar 202 rotates synchronously, it drives the sprocket fixed to its left side to rotate synchronously. The gear 206 rotates synchronously. While the gear 206 on the upper rear end of the flattening rod 202 rotates, it also drives the gear 206 on the left side of the upper front end flattening rod 202 to rotate synchronously through meshing. This drives the driven sprocket 204 on the right side of the upper front end flattening rod 202 to rotate synchronously. When the driven sprocket 204 rotates, it drives the corresponding driving sprocket 203 to rotate synchronously through the corresponding chain 205. This drives multiple flattening rods 202 to rotate synchronously. The rotation of multiple flattening rods 202 flattens and flattens the plastic film, thus avoiding scratching the outer wall of the plastic film.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plastic film blowing machine, comprising a frame (1), characterized in that: An air pump (3) is fixedly connected to the inner bottom wall of the frame (1). One end of the air pump (3) is connected to an air extraction pipe (4), and the other end of the air pump (3) is connected to an air delivery pipe (5). An organic body (6) is fixedly connected to the outer wall of the air delivery pipe (5). A cooling box (7) is connected to the end of the air extraction pipe (4). An air inlet (8) is provided at both the front and rear ends of the left side of the cooling box (7). A drawer (9) is slidably connected to the lower front side of the cooling box (7). An anti-scratch flattening mechanism (2) is installed inside the frame (1). The anti-scratch flattening mechanism (2) is used to transport and flatten the plastic film.

2. The plastic film blowing machine according to claim 1, characterized in that: The anti-scratch flattening mechanism (2) includes a motor (201). The bottom of the motor (201) is fixedly connected to the right end of the inner middle of the frame (1). Multiple flattening rods (202) are equidistantly rotatably connected to the inner middle of the frame (1). The right end of the flattening rod (202) at the lower rear end is fixedly connected to the output end of the motor (201). The right end of the outer wall of the two lower flattening rods (202) is fixedly connected to a drive sprocket (203). The right end of the outer wall of the two upper flattening rods (202) is fixedly connected to a driven sprocket (204). The two drive sprockets (203) are connected to the corresponding driven sprockets (204) through a corresponding chain (205). The left end of the outer wall of the two upper flattening rods (202) is fixedly connected to a gear (206).

3. A plastic film blowing machine according to claim 1, characterized in that: A fixing frame (10) is fixedly connected to the inner side of each of the two air inlets (8), and a filter screen (11) is fixedly connected to the outer wall of each of the two fixing frames (10).

4. A plastic film blowing machine according to claim 1, characterized in that: A fixing ring (12) is fixedly connected to the front side of the drawer (9), and a pull ring (13) is rotatably connected to the inner side of the fixing ring (12).

5. A plastic film blowing machine according to claim 2, characterized in that: The bottom of the motor (201) is fixedly connected to a stabilizer (14), and screws (15) are threadedly connected to the front, rear and left and right ends of the stabilizer (14).

6. A plastic film blowing machine according to claim 4, characterized in that: The outer wall of the pull ring (13) is fixedly connected to a rubber sleeve (16), and the outer wall of the rubber sleeve (16) is fixedly connected to multiple anti-slip rings (17) at equal intervals.

7. A plastic film blowing machine according to claim 1, characterized in that: A hot melt machine (18) is fixedly connected to the rear end of the inner bottom wall of the frame (1), and a funnel (19) is connected to the top of the hot melt machine (18).

8. A plastic film blowing machine according to claim 1, characterized in that: X-shaped brackets (20) are installed on both the left and right sides of the frame (1), and screws (21) are threaded to the four corners of the two X-shaped brackets (20).

Images