Production equipment and method for producing PIR film of hygienic product

Abstract

The invention discloses production equipment and method for producing a PIR film of a hygienic product, and relates to the technical field of PIR film production. Comprising a main body assembly and a freezing assembly and a heating assembly which are fixed to the two ends of the main body assembly, the outer wall of the main body assembly is provided with a compression assembly used for pressurizing and impacting plastic particles, and the plastic particles enter the freezing assembly and the heating assembly through the top of the main body assembly. The freezing assembly embrittles the first batch of plastic particles, and the heating assembly softens the second batch of plastic particles. According to the invention, compressed air is used for performing high-pressure injection on a first batch of plastics in a brittle state and a second batch of plastics in a softened state, so that the first batch of plastics and the second batch of plastics collide with each other, and plastic particles are subjected to impact crushing; the first batch of plastics and the second batch of plastics driven by the compressed air have large kinetic energy when colliding with each other, and crushing of plastic particles can be completed sufficiently.

Description

Technical Field

[0001] The invention relates to the technical field of PIR film production, in particular to a production device and a method for producing a PIR film for sanitary products. Background Art

[0002] Hygiene products refer to various products used for personal hygiene and care in daily life, mainly including female hygiene products, male hygiene products, baby care products, medical and hygiene products, oral hygiene products, etc. In the production process of some hygiene products, waterproof base films are required, usually made of polyethylene or polypropylene materials to prevent liquid leakage and keep clothes dry. PCR and PIR plastic particles are recycled plastics made from recycled materials. The use of such materials helps to reduce plastic waste and promote sustainable development. When preparing PIR film, the plastic particles need to be crushed, cleaned, melted, extruded, rolled and other steps.

[0003] Patent publication number CN112776212A is a multi-stage crushing and processing device for producing plastic particles. Through the cooperation of a first crushing mechanism and a second crushing mechanism, the plastic can be crushed twice in succession. After the two crushings, relatively fine plastic particles can be obtained. Through the cooperation of a feeding mechanism and an auxiliary mechanism, the plastic can be placed in a storage box first, and then guided by a second material guide box to fall into the second crushing mechanism. Through the cooperation of a pushing mechanism and a shaking mechanism, when the pushing mechanism opens the through hole at the bottom of the first material guide box, a knocking hammer knocks the first material guide box once, which is beneficial to the discharge of plastic particles.

[0004] In the process of crushing plastic particles by mechanical crushing methods according to the above and similar technical solutions, due to the relatively small volume of plastic particles, in order to achieve complete crushing of the plastic particles, the crushed plastic particles need to be crushed twice or even three times to achieve the desired crushing effect. However, in the process of multiple crushing, the crushed plastic particles will hide or adhere to the surface of the crushing equipment or the joints of mechanical parts. When plastic particles of different materials need to be crushed, even after cleaning, there will still be a small amount of particulate impurities remaining. The hidden plastic particles will cause the purity of the crushed plastic particles to be poor, affecting subsequent use. Summary of the invention

[0005] The object of the present invention is to provide a production device and method for producing a PIR film for sanitary products, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a production device and method for producing a PIR film for sanitary products, comprising a main body component and a freezing component and a heating component fixed at both ends of the main body component, the outer wall of the main body component is provided with a compression component for pressurizing and impacting plastic particles, the plastic particles enter through the top of the main body component, and enter the freezing component and the heating component respectively, the first batch of plastic particles are embrittled by the freezing component, and the second batch of plastic particles are softened by the heating component, under the action of the compression component, the embrittled and softened plastic particles impact each other to complete the crushing of the plastic particles, the main body component comprises a main cylinder, the top of the main cylinder is provided with a top plate, and the main cylinder is provided with a plurality of discharge ports; The freezing assembly includes a first storage box, a spray pipe is fixed in the first storage box, a plurality of nozzles are arranged on the spray pipe, and a feed pipe for conveying liquid nitrogen is connected to the spray pipe. The heating assembly includes a second storage box, a plurality of electric heating plates are fixed in the second storage box, a plurality of heating rods are fixed between the electric heating plates, a first storage tank and a second storage tank are respectively fixed on the main cylinder, the first storage tank and the second storage tank are respectively connected to the first storage box and the second storage box, a conveying pipe for conveying plastic particles is fixed on the first storage tank and the second storage tank, and a nozzle is fixed on the conveying pipe, and the nozzles correspond to each other; The compression assembly includes an air compressor, which is connected to the first storage tank and the second storage tank respectively. After the air compressor is started, the compressed air is delivered to the first storage tank and the second storage tank respectively, and the brittle and softened plastic particles stored in the first storage tank and the second storage tank are sprayed out through the delivery pipe and the nozzle to impact-crush the plastic particles.

[0007] Furthermore, an air pressure tank is fixed on the main cylinder, an air intake pipe is fixed between the air pressure tank and the air compressor, and a shunt pipe is fixed between the air pressure tank and the first storage tank and the second storage tank. A control motor is provided on the air pressure tank, and the control motor is used to perform closed storage of the compressed gas entering the air pressure tank, and transport the compressed gas to the first storage tank and the second storage tank through the shunt pipe by opening and closing.

[0008] Furthermore, a first connecting cylinder and a second connecting cylinder are respectively fixed between the first storage tank and the second storage tank and the first storage box and the second storage box, and control valves are fixed on the first connecting cylinder and the second connecting cylinder. When the brittle and softened plastic particles enter the first storage tank and the second storage tank respectively, the control valve is closed. At this time, the compressed air entering the first storage tank and the second storage tank will drive the plastic particles into the conveying pipe to prevent the plastic particles from flowing back. A first collecting base and a second collecting base are respectively fixed in the first storage box and the second storage box.

[0009] Furthermore, an impact assembly for enhancing the impact effect of plastic particles is arranged in the main cylinder. The impact assembly includes an impact cylinder, on which a diffusion head is fixed, and nozzles are sealed and inserted in the diffusion heads. When the brittle and softened plastic particles are sprayed out through the nozzles respectively, they will diffuse slightly in the diffusion heads, thereby expanding the spraying area of ​​the plastic particles and colliding with each other under the restriction of the impact cylinder.

[0010] Furthermore, a reinforcing component for increasing the impact frequency of plastic particles is fixed in the main cylinder, the reinforcing component includes a reinforcing ring, a plurality of inner tubes are fixed on the reinforcing ring, the inner tubes are all inclined, the inner tubes are all inserted into the impact cylinder, the reinforcing ring is connected to the compression component, a part of the compressed gas generated by the compression component will enter the reinforcing ring, and be sprayed out obliquely through the plurality of inner tubes, blowing the crushed plastic particles upwards, so that the brittle and softened plastic particles come into contact with the crushed plastic particles again.

[0011] Furthermore, a diversion assembly for diverting plastic particles is provided on the top of the main cylinder, and the diversion assembly includes a support plate, a first drive motor is fixed to the bottom of the support plate, a screw is fixed to the first drive motor, and the top plate is in contact with the screw thread. When the first drive motor drives the screw to rotate, the top plate will rise and fall, and the plastic particles accumulated on the top of the top plate will be diverted to the first storage box and the second storage box respectively.

[0012] Furthermore, a limit assembly for improving the stability of the top plate is provided on the top of the support plate. The limit assembly includes a plurality of limit rods. The top plate is sleeved on the outer wall of the limit rods. A clamping plate is fixed on the top of the limit rods. When the top plate is raised or lowered, the limit rods maintain the stability of the top plate.

[0013] Furthermore, a stirring assembly for stirring the plastic particles is arranged on the top plate, and the stirring assembly includes a lifting plate, and the lifting plate is fixed on the top plate, and stirring plates are fixed on the lifting plates. When the top plate drives the lifting plate to move up and down, the stirring plate will flip the plastic particles in the first storage box and the second storage box, thereby increasing the brittleness and softening of the plastic particles.

[0014] Furthermore, a plurality of heat dissipation grooves are provided on the main cylinder, and a discharge pipe is fixed at the bottom of the main cylinder.

[0015] Furthermore, a production method for producing a PIR film for sanitary products uses the above-mentioned production equipment for producing a PIR film for sanitary products.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The production equipment and method for producing the PIR film for sanitary products heat the first batch of plastic particles by a heating component, quickly cool the second batch of plastic particles by a freezing component, so that the plastic particles are in a brittle state, compress the air, and use the compressed air to respectively perform high-pressure injection on the first batch of plastics in a brittle state and the second batch of plastics in a softened state, and adjust the injection port so that the first batch of plastics and the second batch of plastics collide with each other, and impact-crush the plastic particles without using mechanical components. The first batch of plastics and the second batch of plastics driven by compressed air have large kinetic energy when colliding with each other, which is sufficient to crush the plastic particles.

[0017] At the same time, due to the large temperature difference between the first batch of plastics and the second batch of plastics, the huge temperature contrast will further enhance the crushing effect of the plastic particles at the moment when the first batch of plastics and the second batch of plastics collide with each other. While completing the crushing of the plastic particles, it will reduce the generation of impurities in the plastic particles, improve the purity of the plastic particles, facilitate subsequent processing, and reduce the use of mechanical components, preventing the crushed plastic particles from being mixed in the mechanical components, making it easier to clean the equipment.

[0018] Moreover, when the brittle and softened plastic particles are ejected through the nozzles respectively, they will diffuse slightly in the diffusion head, thereby expanding the ejection area of ​​the plastic particles, and collide with each other under the restriction of the impact cylinder, thereby completing the crushing effect on the plastic particles. A part of the compressed gas generated by the compression component will enter the reinforcement ring and be ejected obliquely through multiple inner tubes, blowing the crushed plastic particles upwards, so that the brittle and softened plastic particles can contact the crushed plastic particles again. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the internal structure of the heating component of the present invention; Figure 4 It is a schematic diagram of the structure of the stirring assembly of the present invention; Figure 5 It is a schematic diagram of the internal structure of the freezing component of the present invention; Figure 6 It is a schematic diagram of the internal structure of the main cylinder of the present invention; Figure 7 It is a schematic diagram of the structure of the flow diversion component of the present invention; Figure 8 It is a schematic diagram of the structure of the impact tube of the present invention; Fig. 9 It is a schematic diagram of the reinforcing ring structure of the present invention.

[0020] In the figure: 1. main body assembly; 101. main barrel; 102. heat sink; 103. discharge pipe; 104. delivery pipe; 105. nozzle; 2. freezing assembly; 201. first storage box; 202. feed pipe; 203. spray pipe; 204. nozzle; 205. first collecting base; 206. first connecting barrel; 207. first storage tank; 3. flow diversion assembly; 301. top plate; 302. limit rod; 303. screw rod; 304. support plate; 305. first drive motor; 4. heating assembly; 401. Second storage box; 402. Electric heating plate; 403. Heating rod; 404. Second collecting base; 405. Second connecting tube; 406. Second storage tank; 5. Compression assembly; 501. Air pressure tank; 502. Control motor; 503. Diverter pipe; 504. Inlet pipe; 505. Air compressor; 6. Stirring assembly; 601. Lifting plate; 602. Stirring plate; 7. Impact assembly; 701. Impact tube; 702. Diffuser head; 8. Reinforcement assembly; 801. Reinforcement ring; 802. Inner tube. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the process of melting plastic particles, in order to improve the melting effect of plastic particles, it is required that the plastic particles are processed as much as possible in the crushing stage. Therefore, in order to improve the subsequent processing effect of plastic particles, the plastic particles need to be crushed as much as possible in the initial crushing stage. However, in the actual crushing process, in order to improve the crushing effect, a multiple-cycle crushing method or a multiple crushing method is often used to achieve the desired effect. However, this method has obvious disadvantages, that is, the crushed particles are not easy to clean, which affects the purity of the next plastic particles. The technical solution provided by the present application first screens the plastic particles into two batches, and quickly cools the first batch of plastic particles by a freezing component. The freezing component uses a spray pipe connected to liquid nitrogen to freeze and cool the first batch of plastic particles, so that the plastic particles are in a brittle state. The second batch of plastic particles is heated by a heating component. The heating element of the heating component composed of heating wires heats the second batch of plastic particles. By controlling the temperature The method comprises the following steps: a) crushing the first batch of plastic particles in a brittle state and b) crushing the second batch of plastic particles in a softened state by adjusting the injection port so that the first batch of plastic particles and the second batch of plastic particles collide with each other; b) crushing the first batch of plastic particles in a brittle state and the second batch of plastic particles in a softened state by adjusting the injection port so that the first batch of plastic particles and the second batch of plastic particles collide with each other; and crush the plastic particles by impact without using mechanical components. The first batch of plastic particles and the second batch of plastic particles driven by compressed air have greater kinetic energy when they collide with each other, which is sufficient to crush the plastic particles. Moreover, since the temperature difference between the first batch of plastic particles and the second batch of plastic particles is relatively large, the huge temperature contrast at the moment when the first batch of plastic particles and the second batch of plastic particles collide with each other will further improve the crushing effect of the plastic particles. While crushing the plastic particles, the generation of impurities in the plastic particles is reduced, the purity of the plastic particles is improved, and the subsequent processing is convenient. Moreover, the use of mechanical components is reduced, and the crushed plastic particles are prevented from being mixed in the mechanical components, which makes it easier to clean the equipment.

[0023] like Figure 1-Figure 3 , Figure 5As shown, the present invention provides a technical solution: a production device and method for producing PIR film for sanitary products, comprising a main body component 1 and a freezing component 2 and a heating component 4 fixed at both ends of the main body component 1, the outer wall of the main body component 1 is provided with a compression component 5 for pressurizing and impacting plastic particles, the plastic particles enter through the top of the main body component 1, and enter the freezing component 2 and the heating component 4 respectively, the freezing component 2 embrittles the first batch of plastic particles, and the heating component 4 softens the second batch of plastic particles, under the action of the compression component 5, the embrittled and softened plastic particles impact each other to complete the crushing of the plastic particles, the main body component 1 comprises a main barrel 101, the top of the main barrel 101 is provided with a top plate 301, and the main barrel 101 is provided with a plurality of discharge ports; the freezing component 2 comprises a first storage box 201, a spraying pipe 203 is fixed in the first storage box 201, a plurality of nozzles 204 are provided on the spraying pipe 203, and the spraying pipe 203 is connected to a feeding pipe 202 for conveying liquid nitrogen, and the heating component 4 comprises A second storage box 401, in which a plurality of electric heating plates 402 are fixed, and a plurality of heating rods 403 are fixed between the electric heating plates 402, a first storage tank 207 and a second storage tank 406 are fixed on the main cylinder 101, respectively, the first storage tank 207 and the second storage tank 406 are connected to the first storage box 201 and the second storage box 401 respectively, a conveying pipe 104 for conveying plastic particles is fixed on the first storage tank 207 and the second storage tank 406, and a nozzle 105 is fixed on the conveying pipe 104, and the nozzles 105 correspond to each other; the compression assembly 5 includes an air compressor 505, and the air compressor 505 is connected to the first storage tank 207 and the second storage tank 406 respectively. After the air compressor 505 is started, the compressed air is conveyed to the first storage tank 207 and the second storage tank 406 respectively, and the brittle and softened plastic particles stored in the first storage tank 207 and the second storage tank 406 are sprayed out through the conveying pipe 104 and the nozzle 105, and the plastic particles are impact-crushed.

[0024] It should be noted that after the plastic particles are added into the main barrel 101, the plastic particles will be divided into two batches, the first batch will enter the freezing component 2, and the second batch will enter the heating component 4. After the liquid nitrogen is transported from the feeding pipe 202 to the spraying pipe 203, the liquid nitrogen will be sprayed out through multiple nozzles 204 and mixed with the plastic particles in the first storage tank 201. Under the action of the liquid nitrogen, the plastic particles will cool down rapidly. At this time, the texture of the plastic particles will become relatively fragile. When the plastic particles in the second storage tank 401 come into contact with the heating rod 403, they will be softened by the heating rod 403 in a high temperature state. By controlling the temperature of the heating rod 403, the plastic particles will be softened. The particles will not melt, but their surfaces will be relatively softened. The embrittled plastic particles will enter the first storage tank 207, and the softened plastic particles will enter the second storage tank 406. At this time, the air compressor 505 compresses the air and delivers the compressed air to the first storage tank 207 and the second storage tank 406. Under the impact of the compressed gas, the plastic particles are respectively delivered to the delivery pipe 104 and sprayed out through the nozzle 105. Since the nozzle 105 is in a corresponding state, the embrittled plastic particles and the softened plastic particles will collide with each other under the action of the compressed air, thereby completing the crushing effect of the plastic particles.

[0025] like Figure 2 As shown, an air pressure tank 501 is fixed on the main cylinder 101, an air intake pipe 504 is fixed between the air pressure tank 501 and the air compressor 505, and a shunt pipe 503 is fixed between the air pressure tank 501 and the first storage tank 207 and the second storage tank 406. A control motor 502 is provided on the air pressure tank 501. The control motor 502 is used for closed storage of the compressed gas entering the air pressure tank 501, and transporting the compressed gas to the first storage tank 207 and the second storage tank 406 through the shunt pipe 503 by opening and closing.

[0026] like Figure 3-Figure 5 As shown, the first connecting cylinder 206 and the second connecting cylinder 405 are fixed between the first storage tank 207 and the second storage tank 406 and the first storage box 201 and the second storage box 401, respectively. Control valves are fixed on the first connecting cylinder 206 and the second connecting cylinder 405. When the embrittled and softened plastic particles enter the first storage tank 207 and the second storage tank 406, respectively, the control valves are closed. At this time, the compressed air entering the first storage tank 207 and the second storage tank 406 will drive the plastic particles to enter the conveying pipe 104 to prevent the plastic particles from flowing back. The first storage box 201 and the second storage box 401 are respectively fixed with the first collecting base 205 and the second collecting base 404.

[0027] like Figure 8 and Fig. 9 As shown, an impact assembly 7 for enhancing the impact effect of plastic particles is arranged in the main cylinder 101, and the impact assembly 7 includes an impact cylinder 701, a diffusion head 702 is fixed on the impact cylinder 701, and the nozzles 105 are respectively sealed and inserted in the diffusion heads 702. When the brittle and softened plastic particles are respectively sprayed out through the nozzles 105, they will diffuse slightly in the diffusion heads 702, thereby expanding the spraying area of ​​the plastic particles and colliding with each other under the restriction of the impact cylinder 701.

[0028] like Fig. 9 As shown, a reinforcing component 8 for increasing the impact frequency of plastic particles is fixed in the main cylinder 101, and the reinforcing component 8 includes a reinforcing ring 801, on which are fixed a plurality of inner tubes 802, all of which are inclined, and are inserted into the impact cylinder 701. The reinforcing ring 801 is connected to the compression component 5, and a part of the compressed gas generated by the compression component 5 will enter the reinforcing ring 801 and be sprayed out obliquely through the plurality of inner tubes 802, blowing the crushed plastic particles upward, so that the brittle and softened plastic particles come into contact with the crushed plastic particles again.

[0029] like Figure 6 and Figure 7 As shown, a diversion component 3 for diverting plastic particles is arranged on the top of the main cylinder 101, and the diversion component 3 includes a support plate 304, a first drive motor 305 is fixed to the bottom of the support plate 304, a screw rod 303 is fixed to the first drive motor 305, and the top plate 301 is in threaded contact with the screw rod 303. When the first drive motor 305 drives the screw rod 303 to rotate, the top plate 301 will rise and fall, and the plastic particles accumulated on the top of the top plate 301 will be diverted to the first storage box 201 and the second storage box 401 respectively.

[0030] like Figure 6 As shown, a limiting assembly for improving the stability of the top plate 301 is provided on the top of the support plate 304, and the limiting assembly includes a plurality of limiting rods 302. The top plate 301 is sleeved on the outer wall of the limiting rods 302, and a clamping plate is fixed on the top of the limiting rods 302. When the top plate 301 is raised or lowered, the limiting rods 302 maintain the stability of the lifting of the top plate 301.

[0031] like Figure 4 As shown, a stirring assembly 6 for stirring plastic particles is provided on the top plate 301, and the stirring assembly 6 includes a lifting plate 601, and the lifting plate 601 is fixed on the top plate 301, and a stirring plate 602 is fixed on the lifting plate 601. When the top plate 301 drives the lifting plate 601 to move up and down, the stirring plate 602 will flip the plastic particles in the first storage box 201 and the second storage box 401, thereby increasing the brittleness and softening of the plastic particles.

[0032] like Figure 1As shown, a plurality of heat dissipation slots 102 are formed on the main cylinder 101 , and a discharge pipe 103 is fixed at the bottom of the main cylinder 101 .

[0033] It should be noted that after the plastic particles are added into the main cylinder 101, when the first driving motor 305 drives the screw rod 303 to rotate, the top plate 301 will rise and fall, and the plastic particles accumulated on the top of the top plate 301 will be divided into two batches, the first batch enters the freezing component 2, and the second batch enters the heating component 4. After the liquid nitrogen in the freezing component 2 is transported to the spraying pipe 203 by the feeding pipe 202, the liquid nitrogen will be sprayed out through multiple nozzles 204 and mixed with the plastic particles in the first storage box 201. When the plastic particles in the second storage box 401 come into contact with the heating rod 403, they will be softened by the heating rod 403 in a high temperature state. The embrittled plastic particles will enter the first storage tank 207, and the softened plastic particles will enter the second storage tank 406. At this time, after the air compressor 505 compresses the air, it will transport the compressed air to the air pressure tank 501, and the compressed gas will be transported to the first storage tank through the shunt pipe 503. In the storage tank 207 and the second storage tank 406, when the brittle and softened plastic particles enter the first storage tank 207 and the second storage tank 406 respectively, the control valve is closed. At this time, the compressed air entering the first storage tank 207 and the second storage tank 406 will drive the plastic particles into the conveying pipe 104 to prevent the plastic particles from flowing back. Under the impact of the compressed gas, the plastic particles are respectively conveyed to the conveying pipe 104 and sprayed out through the nozzle 105. When the brittle and softened plastic particles are sprayed out through the nozzle 105 respectively, they will diffuse slightly in the diffusion head 702, thereby expanding the spraying area of ​​the plastic particles, and collide with each other under the restriction of the impact cylinder 701, thereby completing the crushing effect of the plastic particles. A part of the compressed gas generated by the compression component 5 will enter the reinforcement ring 801 and be sprayed out obliquely through the multiple inner tubes 802, blowing the crushed plastic particles upward, so that the brittle and softened plastic particles are in contact with the crushed plastic particles again.

[0034] A production method for producing a PIR film for sanitary products, using the above-mentioned production equipment for producing a PIR film for sanitary products, comprising: step 1: crushing, after adding plastic particles into the main barrel 101, the plastic particles will be divided into two batches, the first batch will enter the freezing component 2, and the second batch will enter the heating component 4. After the liquid nitrogen in the freezing component 2 is transported to the spraying pipe 203 by the feed pipe 202, the liquid nitrogen will be sprayed out through multiple nozzles 204 and mixed with the plastic particles in the first storage box 201. Under the action of the liquid nitrogen, the plastic particles The temperature will drop rapidly, and the texture of the plastic particles will become relatively fragile. When the plastic particles in the second storage box 401 come into contact with the heating rod 403, they will be softened by the heating rod 403 at a high temperature. By controlling the temperature of the heating rod 403, the plastic particles will not melt, but will be relatively softened on the surface. The embrittled plastic particles will enter the first storage tank 207, and the softened plastic particles will enter the second storage tank 406. At this time, the air compressor 505 compresses the air. After that, the compressed air will be delivered to the first storage tank 207 and the second storage tank 406, and under the impact of the compressed gas, the plastic particles will be delivered to the delivery pipe 104 respectively, and sprayed out through the nozzle 105. Since the nozzle 105 is in a state corresponding to each other, the brittle plastic particles and the softened plastic particles will collide with each other under the action of the compressed air to obtain the broken objects A; Step 2: Melt extrusion, after the broken objects A are cleaned and dried, they are placed in a heated extruder, and a suitable extruder is selected, usually a single-screw or twin-screw extruder , adjust the screw and mold to adapt to the characteristics of PIR, divide the heating area into multiple temperature control zones, control the temperature to reach the molten state of the plastic, usually set to 180℃ to 220℃, and ensure that the broken object A is heated evenly to avoid overheating or local precipitation, and obtain the molten object B; Step three: extrude the film, select flat film extrusion or blown film process according to needs, such as using the blown film method, blow the molten plastic gas into a film through a ring mold, control the gas pressure and stretch ratio, and control the film thickness by adjusting the extrusion speed and mold gap to ensure uniformity, and obtain the molded object C.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A production device for producing a PIR film for sanitary products, comprising a main body component (1) and a freezing component (2) and a heating component (4) fixed at both ends of the main body component (1); the outer wall of the main body component (1) is provided with a compression component (5) for pressurizing and impacting plastic particles; the plastic particles enter through the top of the main body component (1) and enter the freezing component (2) and the heating component (4) respectively; the freezing component (2) embrittles the first batch of plastic particles, and the heating component (4) softens the second batch of plastic particles; under the action of the compression component (5), the embrittled and softened plastic particles impact each other, thereby completing the crushing of the plastic particles; the device is characterized in that: The main body component (1) comprises a main cylinder (101), a top plate (301) is arranged on the top of the main cylinder (101), and a plurality of discharge ports are opened on the main cylinder (101); The freezing assembly (2) comprises a first storage box (201), a spray pipe (203) is fixed in the first storage box (201), a plurality of nozzles (204) are arranged on the spray pipe (203), and a feed pipe (202) for conveying liquid nitrogen is connected to the spray pipe (203). The heating assembly (4) comprises a second storage box (401), a plurality of electric heating plates (402) are fixed in the second storage box (401), and a plurality of heating rods (404) are fixed between the electric heating plates (402). 3) A first storage tank (207) and a second storage tank (406) are fixed to the main cylinder (101), respectively. The first storage tank (207) and the second storage tank (406) are connected to the first storage box (201) and the second storage box (401), respectively. A delivery pipe (104) for delivering plastic particles is fixed to the first storage tank (207) and the second storage tank (406), and a nozzle (105) is fixed to the delivery pipe (104), and the nozzles (105) correspond to each other; The compression assembly (5) comprises an air compressor (505), and the air compressor (505) is connected to the first storage tank (207) and the second storage tank (406) respectively. After the air compressor (505) is started, the compressed air is transported to the first storage tank (207) and the second storage tank (406) respectively, and the brittle and softened plastic particles stored in the first storage tank (207) and the second storage tank (406) are sprayed out through the conveying pipe (104) and the nozzle (105), thereby impact-crushing the plastic particles.

2. A production equipment for producing PIR film for sanitary products according to claim 1, characterized in that: A pressure tank (501) is fixed on the main cylinder (101), an air intake pipe (504) is fixed between the pressure tank (501) and the air compressor (505), and a shunt pipe (503) is fixed between the pressure tank (501) and the first storage tank (207) and the second storage tank (406). A control motor (502) is provided on the pressure tank (501), and the control motor (502) is used to store compressed gas entering the pressure tank (501) in a closed manner, and to transport the compressed gas to the first storage tank (207) and the second storage tank (406) through the shunt pipe (503) by opening and closing.

3. The production equipment for producing PIR film for sanitary products according to claim 1, characterized in that: A first connecting cylinder (206) and a second connecting cylinder (405) are fixed between the first storage tank (207) and the second storage tank (406) and the first storage box (201) and the second storage box (401), respectively. A control valve is fixed on the first connecting cylinder (206) and the second connecting cylinder (405). When the brittle and softened plastic particles enter the first storage tank (207) and the second storage tank (406), respectively, the control valve is closed. At this time, the compressed air entering the first storage tank (207) and the second storage tank (406) will drive the plastic particles to enter the conveying pipe (104) to prevent the plastic particles from flowing back. A first collecting base (205) and a second collecting base (404) are fixed in the first storage box (201) and the second storage box (401), respectively.

4. The production equipment for producing PIR film for sanitary products according to claim 1, characterized in that: An impact assembly (7) for enhancing the impact effect of the plastic particles is arranged in the main cylinder (101). The impact assembly (7) comprises an impact cylinder (701). A diffusion head (702) is fixed on the impact cylinder (701). The nozzles (105) are respectively sealed and inserted in the diffusion heads (702). When the brittle and softened plastic particles are respectively sprayed out through the nozzles (105), they will diffuse slightly in the diffusion heads (702), thereby expanding the spraying area of ​​the plastic particles, and collide with each other under the restriction of the impact cylinder (701).

5. The production equipment for producing PIR film for sanitary products according to claim 4, characterized in that: A reinforcing assembly (8) for increasing the impact frequency of plastic particles is fixed inside the main cylinder (101). The reinforcing assembly (8) comprises a reinforcing ring (801). A plurality of inner tubes (802) are fixed on the reinforcing ring (801). The inner tubes (802) are all inclined. The inner tubes (802) are all inserted into the impact cylinder (701). The reinforcing ring (801) is connected to the compression assembly (5). A portion of the compressed gas generated by the compression assembly (5) enters the reinforcing ring (801) and is sprayed out obliquely through the plurality of inner tubes (802), blowing the crushed plastic particles upwards, so that the brittle and softened plastic particles come into contact with the crushed plastic particles again.

6. The production equipment for producing PIR film for sanitary products according to claim 1, characterized in that: A flow diversion assembly (3) for diverting plastic particles is arranged at the top of the main cylinder (101), the flow diversion assembly (3) comprising a support plate (304), a first drive motor (305) being fixed at the bottom of the support plate (304), a screw rod (303) being fixed on the first drive motor (305), the top plate (301) being in threaded contact with the screw rod (303), when the first drive motor (305) drives the screw rod (303) to rotate, the top plate (301) will rise and fall, and the plastic particles accumulated on the top of the top plate (301) will be diverted to the first storage box (201) and the second storage box (401) respectively.

7. The production equipment for producing PIR film for sanitary products according to claim 6, characterized in that: A limiting assembly for improving the stability of the top plate (301) is arranged on the top of the support plate (304), the limiting assembly comprising a plurality of limiting rods (302), the top plate (301) is sleeved on the outer wall of the limiting rods (302), a clamping plate is fixed on the top of the limiting rods (302), and when the top plate (301) is raised or lowered, the limiting rods (302) maintain the stability of the top plate (301) when it is raised or lowered.

8. The production equipment for producing PIR film for sanitary products according to claim 1, characterized in that: The top plate (301) is provided with a stirring assembly (6) for stirring the plastic particles. The stirring assembly (6) comprises a lifting plate (601) which is fixed on the top plate (301). A stirring plate (602) is fixed on each of the lifting plates (601). When the top plate (301) drives the lifting plate (601) to move up and down, the stirring plate (602) will stir the plastic particles in the first storage box (201) and the second storage box (401), thereby increasing the embrittlement and softening of the plastic particles.

9. The production equipment for producing PIR film for sanitary products according to claim 1, characterized in that: The main cylinder (101) is provided with a plurality of heat dissipation grooves (102), and a discharge pipe (103) is fixed at the bottom of the main cylinder (101).

10. A method for producing a PIR film for sanitary products, characterized in that: A production device for producing a PIR film for sanitary products as described in any one of claims 1 to 9 is used.

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