CN210161572U

CN210161572U - Plastic forming multilayer co-extrusion forming head

Info

Publication number: CN210161572U
Application number: CN201921062981.7U
Authority: CN
Inventors: 关慧超
Original assignee: Shanxi Rongde Plastic Industry Co Ltd
Current assignee: Shanxi Rongde Plastic Industry Co Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-03-20
Anticipated expiration: 2029-07-09

Abstract

The utility model discloses a plastic forming multilayer coextrusion molding aircraft nose, including the lid, lid one end sets up the front end housing, and the other end sets up the rear end cap, and lid one side sets up water conservancy diversion mechanism, and water conservancy diversion mechanism includes first fluid passage, and second fluid passage and third fluid passage establish the molding aircraft nose in the front end housing, and a plurality of extruders are connected to the rear end cap, establish first runner in lid and the rear end cap, second runner and third flow channel. The utility model has the advantages of reasonable design, be linked together extruder and water conservancy diversion mechanism through first runner, second runner and third runner, make the even plastic layer of molten plastic blank formation thickness in order in the extruder to extrude along the shaping aircraft nose, saved the technology operation, liberated the labour, reduced manufacturing cost, improved the economic benefits of enterprise.

Description

Plastic forming multilayer co-extrusion forming head

Technical Field

The utility model belongs to the plastics field of making especially relates to a plastics shaping multilayer coextrusion aircraft nose.

Background

With the rapid development of economy and the increasing improvement of living standard of people, the industries of cosmetics, foods, medicines, pesticides, daily chemicals and the like in China are also developed in a changing way, the technical level of product packaging is also expanded to a higher level, the existing common single-layer plastic packaging material cannot meet the requirement of improving the packaging grade, and in the existing plastic molding equipment, the process for manufacturing the multi-layer plastic packaging material is complicated, the production cost is high, and the economic benefit of enterprises is not favorably improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a convenient plastic molding multilayer coextrusion molding machine head of technology.

The utility model discloses a realize like this: a plastic forming multilayer coextrusion forming machine head comprises a cover body, wherein a front end cover is arranged at one end of the cover body, a rear end cover is arranged at the other end of the cover body, the front end cover, the cover body and the rear end cover are connected together to ensure the air tightness and the stability of the machine head in work, a flow guide mechanism is arranged at one side of the cover body close to the front end cover and is used for sequentially guiding molten plastic blanks flowing into a first flow passage, a second flow passage and a third flow passage from an extruder to further obtain a multilayer plastic packaging material with uniform distribution, the flow guide mechanism is of a tower-shaped structure and comprises a first fluid passage, a second fluid passage and a third fluid passage, the second fluid passage is arranged outside the first fluid passage, the third fluid passage is arranged outside the second fluid passage, a forming machine head is arranged in the front end cover, and one side of the forming machine head close to the cover body is fixedly connected with the flow, cutting along the end face of a forming machine head, namely separating extruded multilayer materials from a cover body, wherein a plurality of extruders are connected on a rear end cover, spiral extrusion rods are arranged in the extruders, molten plastic blanks in the extruders are extruded through the spiral extrusion rods, a first flow channel, a second flow channel and a third flow channel are arranged in the cover body and the rear end cover, two ends of the first flow channel are simultaneously communicated with the extruders and the first flow channel, the molten plastic blanks in the first flow channel form a base layer of the multilayer materials, the thickness of the base layer is large, the strength, the rigidity, the dimensional stability and the like of products are mainly determined, common materials of base layer polymers comprise polyethylene, polypropylene, polyvinyl chloride and the like, two ends of the second flow channel are simultaneously communicated with the extruders and the second flow channel, the materials in the second flow channel form a bonding layer, and the base layer and a functional layer are bonded, the resin commonly used for the bonding layer comprises maleic anhydride, acrylic acid and the like, two ends of the third flow channel are simultaneously communicated with the extruder and the third fluid channel, a molten plastic blank in the third flow channel forms a functional layer, most of the functional layer is a permeation resistant layer and is used for improving the service temperature and appearance performance of a product, commonly used polymers of the functional layer are polyvinylidene fluoride and polyacrylonitrile, polyvinylidene fluoride is not easy to oxidize in the air, and polyacrylonitrile is good in weather resistance and sunlight resistance.

Preferably, the central line of the first fluid channel, the central line of the second fluid channel, the central line of the third fluid channel and the central line of the molding machine head are on the same straight line, so that the uniformity of the wall thickness of the multilayer material is ensured.

Preferably, the front end cover is connected with the cover body through screws, and the rear end cover is connected with the cover body through screws, so that good sealing performance among the front end cover, the rear end cover and the cover body is guaranteed.

Preferably, the inner diameter of the forming head is smaller than the outer diameter of the third fluid channel, and the flow guide mechanism is clamped in the cover body through the front end cover.

The utility model has the advantages that: the utility model has the advantages of reasonable design, be linked together extruder and water conservancy diversion mechanism through first runner, second runner and third runner, make the even plastic layer of molten plastic blank formation thickness in order in the extruder to extrude along the shaping aircraft nose, saved the technology operation, liberated the labour, reduced manufacturing cost, improved the economic benefits of enterprise.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the flow guide mechanism of the present invention;

in the figure: 1. a cover body; 2. a front end cover; 3. a rear end cap; 4. a flow guide mechanism; 5. a first fluid channel; 6. a second fluid passage; 7. a third fluid passage; 8. a molding head; 9. an extruder; 10. a screw extrusion stem; 11. a first flow passage; 12. a second flow passage; 13. a third flow path; 14. and (4) screws.

Detailed Description

In order to understand the technical solution of the present invention more clearly, the present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, a plastic molding multi-layer coextrusion molding machine head includes a cover body 1, one end of the cover body 1 is provided with a front end cover 2, the other end is provided with a rear end cover 3, the rear end cover 3 is connected with the cover body 1 through a screw 14, so as to ensure good sealing performance between the front end cover 2, the rear end cover 3 and the cover body 1, and ensure air tightness and stability of the machine head in operation, one side of the cover body 1 close to the front end cover 2 is provided with a flow guide mechanism 4 for guiding molten plastic blanks flowing from an extruder 9 into a first flow passage 11, a second flow passage 12 and a third flow passage 13 in sequence, so as to obtain a multi-layer plastic packaging material with uniform distribution, the flow guide mechanism 4 is a tower-shaped structure, the flow guide mechanism 4 includes a first fluid passage 5, a second fluid passage 6 and a third fluid passage 7, the second fluid passage 6 is arranged outside the first fluid passage 5, the third fluid channel 7 is arranged outside the second fluid channel 6, the flow guide mechanism 4 is embedded in the cover body 1, the front end cover 2 is internally provided with a forming machine head 8, one side of the forming machine head 8, which is close to the cover body 1, is fixedly connected with the flow guide mechanism 4, the front end cover 2 is connected with the cover body 1 through a screw 14, the inner diameter of the forming machine head 8 is smaller than the outer diameter of the third fluid channel 7, the flow guide mechanism 4 is clamped in the cover body 1 through the front end cover 2 and is cut along the end surface of the forming machine head 8, so that the extruded multilayer materials are separated from the cover body 1, the rear end cover 3 is connected with a plurality of extruders 9, the extruders 9 are internally provided with screw extrusion rods 10, the melted plastic blanks in the extruders 9 are extruded through the screw extrusion rods 10, the cover body 1 and the rear end cover 3 are internally provided with a first flow channel 11, a second flow channel 12 and a, the two ends of the first flow passage 11 are simultaneously communicated with the extruder 9 and the first fluid passage 5, the molten plastic blank in the first flow passage 11 forms a base layer of a multilayer material, the thickness of the base layer is large and mainly determines the strength, rigidity, dimensional stability and the like of a product, common materials of a base layer polymer comprise polyethylene, polypropylene, polyvinyl chloride and the like, the two ends of the second flow passage 12 are simultaneously communicated with the extruder 9 and the second fluid passage 6, the length of the second flow passage is longer than that of the first flow passage, the material in the second flow passage 12 forms an adhesive layer for bonding the base layer and a functional layer, common resins of the adhesive layer comprise maleic anhydride, acrylic acid and the like, the two ends of the third flow passage 13 are simultaneously communicated with the extruder 9 and the third fluid passage 7, the length of the third flow passage is longer than that of the second flow passage, the molten plastic blank in the third flow passage 13 forms a functional layer, most of the functional layer is a permeation resistant layer, the functional layer is made of polyvinylidene fluoride and polyacrylonitrile, the polyvinylidene fluoride is not easy to oxidize in the air, and the polyacrylonitrile has good weather resistance and sun resistance.

The central line of the first fluid channel 5, the central line of the second fluid channel 6, the central line of the third fluid channel 7 and the central line of the molding machine head 8 are on the same straight line, so that the uniformity of the wall thickness of the multilayer material is ensured.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. A plastic molding multilayer coextrusion molding machine head comprises a cover body and is characterized in that a front end cover is arranged at one end of the cover body, a rear end cover is arranged at the other end of the cover body, a flow guide mechanism is arranged at one side of the cover body close to the front end cover and comprises a first fluid channel, a second fluid channel and a third fluid channel, the second fluid channel is arranged outside the first fluid channel, the third fluid channel is arranged outside the second fluid channel, a molding machine head is arranged in the front end cover, one side of the molding machine head close to the cover body is fixedly connected with the flow guide mechanism, a plurality of extruders are connected onto the rear end cover, spiral extrusion rods are arranged in the extruders, a first flow channel, a second flow channel and a third flow channel are arranged in the cover body and the rear end cover, the two ends of the first flow channel are simultaneously connected with the extruders and the first fluid channel, the two ends of the second flow channel are simultaneously connected with the extruder and the second fluid channel, and the two ends of the third flow channel are simultaneously connected with the extruder and the third fluid channel.

2. A plastic-molding multi-layer coextrusion die as claimed in claim 1, wherein the centerlines of said first fluid passage, second fluid passage, third fluid passage are collinear with the centerline of the die.

3. The plastic-molding multi-layer coextrusion die as claimed in claim 1, wherein said front end cap is connected to said cap body by screws, and said rear end cap is connected to said cap body by screws.

4. A plastic-molding multi-layer coextrusion die as claimed in claim 1, wherein said die has an inner diameter smaller than an outer diameter of the third fluid passage.