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CN-224210542-U - Co-extrusion blow molding assembly for multi-layer plastic packaging bag

CN224210542UCN 224210542 UCN224210542 UCN 224210542UCN-224210542-U

Abstract

The utility model belongs to the technical field of blow molding equipment, and particularly relates to a multilayer plastic packaging bag coextrusion blow molding assembly which comprises a blow molding device, wherein an isolation mechanism is fixedly arranged on the outer surface of the blow molding device, a circulating cooling mechanism is fixedly arranged on the outer surface of the blow molding device, 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 roll shaft is fixedly arranged on the inner surface of the isolation cover, and a shielding cover is rotatably arranged on the outer surface of the isolation cover through a hinge. This multilayer plastic packaging bag crowds blowing subassembly altogether, through the wind that the air pump pipe blown out with the blowing pipe, hot air gets into in the circulation gas pipe network through the air pump pipe, then cools off through the water in the cooling tank, then spouts from the blowing pipe, and the water in the cooling tank carries out the heat exchange to circulation gas pipe network, and when cooling water heat exchange, the water pump pours into the cooling water from the outlet pipe into in the cooling tank through the inlet tube.

Inventors

  • ZHAO YUN
  • CHEN HUIQI
  • GAO LEILEI

Assignees

  • 青岛森丽达包装有限公司

Dates

Publication Date
20260508
Application Date
20250521

Claims (6)

  1. 1. The multi-layer plastic packaging bag coextrusion blow molding assembly comprises a blow molding device (1) and is characterized in that an isolation mechanism (2) is fixedly arranged on the outer surface of the blow molding device (1), and a circulating cooling mechanism (3) is fixedly arranged on the outer surface of the blow molding device (1); The isolation mechanism (2) comprises an isolation cover (21), the bottom of the isolation cover (21) is fixedly connected with the top of the blow molding device (1), a guide roll shaft (22) is fixedly arranged on the inner surface of the isolation cover (21), and a shielding cover (23) is rotatably arranged on the outer surface of the isolation cover (21) through a hinge.
  2. 2. The multi-layer plastic packaging bag coextrusion blow molding assembly according to claim 1, wherein the circulation cooling mechanism (3) comprises a circulation box (31), a circulation assembly (32) is fixedly arranged in an inner cavity of the circulation box (31), the circulation assembly (32) comprises an air pump pipe (321), the outer surface of the air pump pipe (321) is fixedly connected with the inner surface of the blow molding device (1), and the rear end of the air pump pipe (321) penetrates through the blow molding device (1) and the circulation box (31) and extends to the outside of the circulation box (31).
  3. 3. The coextrusion blow molding assembly according to claim 2, wherein the circulation assembly (32) further comprises a circulation air pipe network (322), an outer surface of the circulation air pipe network (322) is communicated with a bottom end of the air pump pipe (321), a blow molding pipe (323) is fixedly arranged at the bottom of the circulation air pipe network (322), and a front end of the blow molding pipe (323) penetrates through the blow molding device (1) and the circulation box (31) and extends into the blow molding device (1).
  4. 4. The co-extrusion blow molding assembly of claim 1, wherein the circulating cooling mechanism (3) further comprises a cooling assembly (33), the cooling assembly (33) comprises a water pump (331), a water inlet pipe (332) is communicated with the left side of the water pump (331), and a water outlet pipe (333) is communicated with the right side of the water pump (331).
  5. 5. The coextrusion blow molding assembly according to claim 4, wherein the cooling assembly (33) further comprises a cooling box (334), wherein the bottom of the cooling box (334) is communicated with the top end of the water inlet pipe (332), and the inner surfaces of the cooling box (334) are fixedly connected with the outer surfaces of the air pump pipe (321) and the blow molding pipe (323).
  6. 6. The co-extrusion blow molding assembly of the multi-layer plastic packaging bag of claim 4, wherein the cooling assembly (33) further comprises a cooling box (335), the bottom of the cooling box (335) is communicated with the top of the water outlet pipe (333), the front surface of the cooling box (335) is communicated with the back surface of the cooling box (334) through a communicating pipe, a semiconductor refrigerating sheet (336) is fixedly arranged on the inner surface of the cooling box (335), a conductive plate (337) is fixedly arranged on the front surface of the semiconductor refrigerating sheet (336), and a radiator (338) is fixedly arranged on the back surface of the semiconductor refrigerating sheet (336).

Description

Co-extrusion blow molding assembly for multi-layer plastic packaging bag Technical Field The utility model relates to the technical field of blow molding equipment, in particular to a coextrusion blow molding assembly of a multi-layer plastic packaging bag. Background The multilayer coextrusion technology of packaging bag film is an advanced film production process, and utilizes the difference of barrier properties of different plastic materials to extrude multiple materials simultaneously in a molten state by using the multilayer coextrusion technology so as to form the film with a multilayer structure. The film has excellent high barrier property, and can effectively block permeation of substances such as oxygen, water, carbon dioxide, smell and the like, thereby maintaining the quality of the package and prolonging the shelf life. At present, current blowing device is in the use period, in the material plasticization back extrudes to the blowing machine through the hob, the blowing machine is through the top opening upwards to blow the traction, set up the wind ring on the plastic blowing route and cool off plastics, reuse traction mechanism realizes drawing the conveying to the clamp of plastic bag, examine actual blowing mill, usually in order to ensure the abundant cooling of plastic bag, need set up the longer cooling ring of route on the blowing machine, and corresponding traction mechanism then needs to set up in the eminence, this can have following problem in actual operation: 1. The blowing process of the traditional blowing equipment is open, so that the surface of the plastic bag just blown is easy to contact with impurities in the air, and then the impurities are adhered to the surface of the plastic bag to influence the quality of the subsequent plastic bag finished product; 2. The blowing is generally carried out in the traditional blowing equipment and is blown into the plastic bag, then the top of the plastic bag sucks hot air away and then is recycled and blown into the plastic bag, and as the blowing in the plastic bag can carry out heat transfer on the plastic bag, the blowing circulation process has no cooling equipment, so that the cooling effect of the plastic bag is gradually lowered. Disclosure of utility model The present inventors have conducted intensive studies to overcome the above-mentioned drawbacks of the prior art, and have completed the present utility model after a great deal of creative effort. Specifically, the technical problem to be solved by the utility model is to provide a multi-layer plastic packaging bag coextrusion blow molding assembly, so as to solve the technical problems that dust is easy to adhere to the plastic packaging bag in the conventional plastic packaging bag blow molding process, and the cooling effect is gradually weakened after the blowing circulation due to long-time blow molding. In order to solve the technical problems, the utility model provides the following technical scheme: The co-extrusion blow molding assembly for the multi-layer plastic packaging bag comprises a blow molding device, wherein an isolation mechanism is fixedly arranged on the outer surface of the blow molding device, and a circulating cooling mechanism is fixedly arranged on the outer surface of the blow molding device; the isolation mechanism comprises an isolation cover, the bottom of the isolation cover is fixedly connected with the top of the blow molding machine, a guide roll shaft is fixedly arranged on the inner surface of the isolation cover, and a shielding cover is rotatably arranged on the outer surface of the isolation cover through a hinge. As an improved technical scheme, the circulating cooling mechanism comprises a circulating box, a circulating assembly is fixedly arranged in the inner cavity of the circulating box, the circulating assembly comprises an air pump pipe, the outer surface of the air pump pipe is fixedly connected with the inner surface of the blow molding device, and the rear end of the air pump pipe penetrates through the blow molding device and the circulating box and extends to the outer part of the circulating box. As an improved technical scheme, the circulating assembly further comprises a circulating air pipe network, the outer surface of the circulating air pipe network is communicated with the bottom end of the air pump pipe, a blow molding pipe is fixedly arranged at the bottom of the circulating air pipe network, and the front end of the blow molding pipe penetrates through the blow molding device and the circulating box and extends to the inside of the blow molding device. As an improved technical scheme, the circulating cooling mechanism further comprises a cooling assembly, the cooling assembly comprises a water pump, a water inlet pipe is communicated with the left side of the water pump, and a water outlet pipe is communicated with the right side of the water pump. As an improved technical scheme, the cooling assembly furthe