Multi-layer plastic packaging bag co-extrusion blow molding assembly

Abstract

The utility model belongs to the technical field of blow molding equipment, and particularly relates to a multi-layer plastic packaging bag co-extrusion blow molding assembly which comprises a blow molding device, an isolation mechanism is fixedly installed on the outer surface of the blow molding device, and a circulating cooling mechanism is fixedly installed on the outer surface of the blow molding device. And the isolation mechanism comprises an isolation cover, the bottom of the isolation cover is fixedly connected with the top of the blow molding device, a guide roller shaft is fixedly installed on the inner surface of the isolation cover, and a shielding cover is rotationally installed on the outer surface of the isolation cover through a hinge. According to the multi-layer plastic packaging bag co-extrusion blow molding assembly, air blown out of the blow molding pipe is sucked away through the air pump pipe, hot air enters the circulating air pipe network through the air pump pipe, then is cooled through water in the cooling box and then is sprayed out of the blow molding pipe, heat exchange is conducted on the circulating air pipe network through the water in the cooling box, and heat exchange is conducted on the circulating air pipe network while cooling water heat exchange is conducted. The water pump injects cooling water into the cooling box from the water outlet pipe through the water inlet pipe.

Description

Technical Field

[0001] This utility model relates to the field of blow molding equipment technology, and in particular to a co-extrusion blow molding component for multi-layer plastic packaging bags. Background Technology

[0002] Multilayer co-extrusion of packaging film is an advanced film production process. It utilizes the differences in barrier properties of various plastic materials, simultaneously extruding multiple materials in a molten state to form a multilayered film. This film possesses excellent high barrier properties, effectively preventing the penetration of substances such as oxygen, water, carbon dioxide, and odors, thereby maintaining the quality of the packaged goods and extending their shelf life.

[0003] Currently, in existing blow molding equipment, after the material is plasticized, it is extruded into the blow molding machine through a screw. The blow molding machine inflates and pulls the plastic upwards through a top opening. An air ring is set along the plastic blowing path to cool it, and a traction mechanism is used to clamp and convey the plastic bag. However, in actual blow molding plants, to ensure sufficient cooling of the plastic bag, a long cooling ring is usually required on the blow molding machine, and the corresponding traction mechanism needs to be placed at a high position. This presents the following problems in actual operation:

[0004] 1. Traditional blow molding equipment operates in an open process, which makes the surface of freshly blown plastic bags easily come into contact with impurities in the air. This leads to impurities adhering to the surface of the plastic bags and affecting the quality of the finished plastic bags.

[0005] 2. Traditional blow molding equipment typically blows air into the plastic bag, then sucks the hot air away from the top of the bag and recirculates it back into the bag. Since the air passing through the bag transfers heat to the bag, and there is no cooling device during the air circulation process, the cooling effect of the plastic bag gradually decreases. Utility Model Content

[0006] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.

[0007] Specifically, the technical problem to be solved by this utility model is to provide a multi-layer plastic packaging bag co-extrusion blow molding component to solve the current technical problem that dust easily adheres to plastic bags during the blow molding process, and that the cooling effect gradually weakens after long-term blow molding.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0009] A multi-layer plastic packaging bag co-extrusion blow molding assembly includes a blow molding machine, an isolation mechanism fixedly installed on the outer surface of the blow molding machine, and a circulating cooling mechanism fixedly installed on the outer surface of the blow molding machine.

[0010] The isolation mechanism includes an isolation cover, the bottom of which is fixedly connected to the top of the blow molding machine. A guide roller is fixedly installed on the inner surface of the isolation cover, and a shield is rotatably installed on the outer surface of the isolation cover via a hinge.

[0011] As an improved technical solution, the circulating cooling mechanism includes a circulating box, and a circulating assembly is fixedly installed in the inner cavity of the circulating box. The circulating assembly includes an air pump pipe, the outer surface of which is fixedly connected to the inner surface of the blow molding machine, and the rear end of which passes through the blow molding machine and the circulating box and extends to the outside of the circulating box.

[0012] As an improved technical solution, the circulation assembly further includes a circulating air pipeline network. The outer surface of the circulating air pipeline network is connected to the bottom end of the air pump pipe. A blow molding tube is fixedly installed at the bottom of the circulating air pipeline network. The front end of the blow molding tube passes through the blow molding machine and the circulation box and extends into the interior of the blow molding machine.

[0013] As an improved technical solution, the circulating cooling mechanism further includes a cooling component, which includes a water pump. The left side of the water pump is connected to an inlet pipe, and the right side of the water pump is connected to an outlet pipe.

[0014] As an improved technical solution, the cooling assembly further includes a cooling box, the bottom of which is connected to the top of the water inlet pipe, and the inner surface of the cooling box is fixedly connected to the outer surface of the air pump pipe and the blow molding pipe.

[0015] As an improved technical solution, the cooling assembly further includes a cooling box, the bottom of which is connected to the top of the water outlet pipe, the front of which is connected to the back of the cooling box via a connecting pipe, a semiconductor refrigeration chip fixedly installed on the inner surface of the cooling box, a conductive plate fixedly installed on the front of the semiconductor refrigeration chip, and a heat sink fixedly installed on the back of the semiconductor refrigeration chip.

[0016] After adopting the above technical solution, the beneficial effects of this utility model are:

[0017] 1. This utility model adds a dust-proof design to protect plastic bags during the blow molding process. By using the blow molding machine and isolation cover in conjunction with the guide roller and shield, the plastic tube is covered during the blow molding and cooling process, so that dust does not adhere to the plastic bag and impurities are prevented from sticking to the surface of the plastic bag and affecting the quality of the finished plastic bag.

[0018] 2. This utility model improves the cooling effect of the blow molding machine by combining the air pump pipe and circulating air network with the blow molding pipe and cooling box, the cooling box and water pump with the inlet and outlet water pipes, and the outlet water pipe and cooling box with the semiconductor cooling chip and conduction plate. Furthermore, the combination of the cooling box and cooling box allows hot air to be cooled by cooling water, while simultaneously rapidly cooling the cooling water. This ensures that the blow molding machine can circulate and cool the air during long-term blow molding, preventing the air from gradually increasing in temperature and losing its cooling effect after prolonged circulation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the co-extrusion blow molding component for multi-layer plastic packaging bags of this utility model.

[0021] Figure 2 This is a three-dimensional structural diagram of the blow molding machine and circulating cooling mechanism of the multi-layer plastic packaging bag co-extrusion blow molding assembly of this utility model.

[0022] Figure 3 This is a cross-sectional perspective view of the circulating cooling mechanism of the co-extrusion blow molding component for multi-layer plastic packaging bags according to this utility model.

[0023] Figure 4 This is a cross-sectional perspective view of the cooling box structure of the co-extrusion blow molding component for multi-layer plastic packaging bags of this utility model.

[0024] Figure 5 This is a cross-sectional three-dimensional structural diagram of the cooling box of the multi-layer plastic packaging bag co-extrusion blow molding assembly of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Blow molding machine; 2. Isolation mechanism; 21. Isolation cover; 22. Guide roller; 23. Shielding cover; 3. Circulating cooling mechanism; 31. Circulation box; 32. Circulation assembly; 321. Air pump pipe; 322. Circulating air pipeline network; 323. Blow molding pipe; 33. Cooling assembly; 331. Water pump; 332. Water inlet pipe; 333. Water outlet pipe; 334. Cooling box; 335. Cooling chamber; 336. Semiconductor refrigeration chip; 337. Conductive plate; 338. Radiator. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0030] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] like Figure 1 and Figure 2 As shown in the figure, this embodiment provides a multi-layer plastic packaging bag co-extrusion blow molding assembly. The multi-layer plastic packaging bag co-extrusion blow molding assembly includes a blow molding machine 1, an isolation mechanism 2 is fixedly installed on the outer surface of the blow molding machine 1, and a circulating cooling mechanism 3 is fixedly installed on the outer surface of the blow molding machine 1.

[0032] The isolation mechanism 2 includes an isolation cover 21, the bottom of which is fixedly connected to the top of the blow molding machine 1. A guide roller 22 is fixedly installed on the inner surface of the isolation cover 21, and a shield 23 is rotatably installed on the outer surface of the isolation cover 21 via a hinge.

[0033] The isolation cover 21 is supported by a transparent acrylic sheet. The blow molding machine 1 can heat and melt plastic particles and extrude them. The blow molding machine 1 is electrically connected to an external power source and is controlled by an external PLC programming program.

[0034] like Figure 1 , Figure 4 , Figure 4 and Figure 5 As shown, the circulating cooling mechanism 3 includes a circulating box 31, and a circulating assembly 32 is fixedly installed in the inner cavity of the circulating box 31. The circulating assembly 32 includes an air pump pipe 321, the outer surface of which is fixedly connected to the inner surface of the blow molding machine 1, and the rear end of the air pump pipe 321 passes through the blow molding machine 1 and the circulating box 31 and extends to the outside of the circulating box 31.

[0035] The air pump pipe 321 contains a high-power air pump that can draw in cooled hot air and circulate it in the circulating air network 322 and the blow molding pipe 323. The air pump pipe 321 is electrically connected to an external power source and is controlled by an external PLC programming program.

[0036] like Figure 1 , Figure 4 , Figure 4 and Figure 5 As shown, the circulation assembly 32 also includes a circulation air network 322. The outer surface of the circulation air network 322 is connected to the bottom end of the air pump pipe 321. A blow molding pipe 323 is fixedly installed at the bottom of the circulation air network 322. The front end of the blow molding pipe 323 passes through the blow molding machine 1 and the circulation box 31 and extends into the interior of the blow molding machine 1.

[0037] like Figure 1 , Figure 4 , Figure 4 and Figure 5 As shown, the circulating cooling mechanism 3 also includes a cooling component 33, which includes a water pump 331. The left side of the water pump 331 is connected to an inlet pipe 332, and the right side of the water pump 331 is connected to an outlet pipe 333.

[0038] The water pump 331 is electrically connected to an external power source and is controlled by an external PLC programming program.

[0039] like Figure 1 , Figure 4 , Figure 4 and Figure 5 As shown, the cooling assembly 33 also includes a cooling box 334, the bottom of which is connected to the top of the water inlet pipe 332, and the inner surface of the cooling box 334 is fixedly connected to the outer surface of the air pump pipe 321 and the blow molding pipe 323.

[0040] like Figure 1 , Figure 4 , Figure 4 and Figure 5As shown, the cooling assembly 33 also includes a cooling box 335. The bottom of the cooling box 335 is connected to the top of the water outlet pipe 333. The front of the cooling box 335 is connected to the back of the cooling box 334 through a connecting pipe. A semiconductor cooling chip 336 is fixedly installed on the inner surface of the cooling box 335. A conductive plate 337 is fixedly installed on the front of the semiconductor cooling chip 336. A heat sink 338 is fixedly installed on the back of the semiconductor cooling chip 336.

[0041] The thermoelectric cooler 336 is electrically connected to an external power supply and is controlled by an external PLC programming program.

[0042] In use, the plastic raw material is heated and melted in the blow molding machine 1, then blown up by the air sprayed from the blow molding tube 323, and then sprayed into the isolation cover 21 for cooling before proceeding to the next step. The air blown out of the blow molding tube 323 cools the plastic and is then sucked away by the air pump tube 321. The hot air enters the circulating air network 322 through the air pump tube 321, and is then cooled by the water in the cooling box 334 before being sprayed out from the blow molding tube 323. The water in the cooling box 334 exchanges heat with the circulating air network 322. While the cooling water is exchanging heat, the water pump 331 injects cooling water from the water inlet pipe 332 into the cooling box 335 from the water outlet pipe 333. Then, the cold air is transferred to the cooling box 335 through the semiconductor cooling chip 336 and the conduction plate 337. The cooling water exchanges heat with the conduction plate 337, changing from warm water to cold water, and then re-enters the cooling box 334 through the connecting pipe to cool the circulating air network 322.

[0043] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A multi-layer plastic packaging bag co-extrusion blow molding assembly, comprising a blow molding machine (1), characterized in that: An isolation mechanism (2) is fixedly installed on the outer surface of the blow molding machine (1), and a circulating cooling mechanism (3) is fixedly installed on the outer surface of the blow molding machine (1); The isolation mechanism (2) includes an isolation cover (21), the bottom of which is fixedly connected to the top of the blow molding machine (1), a guide roller (22) is fixedly installed on the inner surface of the isolation cover (21), and a shield (23) is rotatably installed on the outer surface of the isolation cover (21) via a hinge.

2. The multi-layer plastic packaging bag co-extrusion blow molding assembly according to claim 1, characterized in that: The circulating cooling mechanism (3) includes a circulating box (31), and a circulating assembly (32) is fixedly installed in the inner cavity of the circulating box (31). The circulating assembly (32) includes an air pump pipe (321), the outer surface of which is fixedly connected to the inner surface of the blow molding machine (1). The rear end of the air pump pipe (321) passes through the blow molding machine (1) and the circulating box (31) and extends to the outside of the circulating box (31).

3. The multi-layer plastic packaging bag co-extrusion blow molding assembly according to claim 2, characterized in that: The circulation assembly (32) also includes a circulation air network (322), the outer surface of which is connected to the bottom end of the air pump pipe (321), and a blow molding pipe (323) is fixedly installed at the bottom of the circulation air network (322). The front end of the blow molding pipe (323) passes through the blow molding machine (1) and the circulation box (31) and extends into the interior of the blow molding machine (1).

4. The multi-layer plastic packaging bag co-extrusion blow molding assembly according to claim 1, characterized in that: The circulating cooling mechanism (3) further includes a cooling component (33), which includes a water pump (331). The left side of the water pump (331) is connected to an inlet pipe (332), and the right side of the water pump (331) is connected to an outlet pipe (333).

5. The multi-layer plastic packaging bag co-extrusion blow molding assembly according to claim 4, characterized in that: The cooling assembly (33) also includes a cooling box (334), the bottom of which is connected to the top of the water inlet pipe (332), and the inner surface of the cooling box (334) is fixedly connected to the outer surface of the air pump pipe (321) and the blow molding pipe (323).

6. The multi-layer plastic packaging bag co-extrusion blow molding assembly according to claim 4, characterized in that: The cooling assembly (33) also includes a cooling box (335), the bottom of which is connected to the top of the water outlet pipe (333), the front of which is connected to the back of the cooling box (334) through a connecting pipe, a semiconductor cooling chip (336) is fixedly installed on the inner surface of the cooling box (335), a conductive plate (337) is fixedly installed on the front of the semiconductor cooling chip (336), and a heat sink (338) is fixedly installed on the back of the semiconductor cooling chip (336).

Images