Multi-layer plastic co-extrusion equipment

Abstract

The utility model belongs to the technical field of plastic processing, and particularly relates to multi-layer plastic co-extrusion equipment which comprises an operation platform, a plurality of air rings are vertically assembled in the middle of the operation platform in a sequence mode, and the two air rings located at the top and the bottom of the operation platform are oppositely arranged in a mirror image mode. A plurality of groups of air rings are arranged in the middle of the operation platform, one group comprises two air rings which are in mirror image fit, and air outlets are formed in the tops of the air rings in an array penetrating manner; according to the utility model, annular blowing is carried out through the plurality of mirror-arranged air rings, the wind direction is inclined through the first air guide plate, and a plurality of sections of airflow barriers are formed on the outer side of the film bubble traction device without influencing the film bubble traction, so that external dust and impurities are blocked, and dust is prevented from being adhered to the film bubble; and dust accidentally entering from an airflow hedging area is captured and adsorbed through a dust sticking belt and dust capturing hairs, so that flaws of plastic film finished products are reduced, and the product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to plastic processing technical field, concretely relates to a kind of multilayer plastic co-extrusion equipment. BACKGROUND

[0002] Multilayer plastic co-extrusion equipment is a kind of processing equipment that different kinds of plastic raw materials are melted by the cooperative work of multiple extruders, and a multilayer structure is formed by co-extrusion die. For example, in the blowing of plastic film, three different plastic raw materials are added to three extruders, and after plasticizing and melting, a multilayer structure film bubble is formed by a multilayer composite die. Under the action of the traction device, the film bubble finally forms a plastic film with a multilayer structure, which is neatly wound by the winding system.

[0003] The multilayer plastic co-extrusion equipment of the prior art mostly operates in an open environment, and the dust control level of the production workshop is uneven. Although the IBC (film bubble internal cooling system) improves the uniformity and transparency of the film by internal circulation cooling, the film bubble is still exposed to the external environment during the traction process, and dust in the workshop is easily adsorbed onto the film bubble. Especially when the operator steps onto the operation platform, a large amount of dust and impurities is more likely to fall, which may cause surface defects of the film, such as pitting, convex bubbles, etc. SUMMARY

[0004] The utility model aims to provide a kind of multilayer plastic co-extrusion equipment, by the wind ring of mirror image setting annular air blowing, by the first air deflector, wind direction is inclined, without affecting film bubble traction, while forming several airflow barriers on its outside, to block external dust impurities, prevent dust from adhering to film bubble, and by dust band, dust catching hair capture and adsorb dust that accidentally enters from airflow counterflow area, thereby reducing the defects of plastic film product, improve product quality.

[0005] The technical solutions adopted by the utility model are as follows:

[0006] A kind of multilayer plastic co-extrusion equipment, including operation platform, the middle part of the operation platform is vertically sequentially assembled with several wind rings, wherein the two wind rings located at the top and bottom of the operation platform are mirror image oppositely arranged, the wind rings located in the middle part of the operation platform are arranged in several groups, one group is mirror image adhered two, the top of the wind ring is arrayedly provided with air outlet, the top of the wind ring and located at one side of the air outlet are fixedly connected with the first air deflector for guiding wind direction, the outer wall of the first air deflector is arranged in arc shape, the outer diameter of one end of the first air deflector is greater than that of the other end, the fixed rod one is fixedly connected between the two first air deflectors in symmetrical mode, the outer wall of the two fixed rod one is fixedly connected with the link ring, the outer wall of the link ring is detachably sleeved with the dust band, and the outer wall of the dust band is arrayedly fixedly connected with the dust catching hair.

[0007] The bottom of the operating platform is fixedly equipped with a composite die head for extruding film bubbles, and the air ring is located above the composite die head.

[0008] A second air guide plate is fixedly connected to the top edge of the air ring and to one side of the air outlet. The height of the second air guide plate is less than that of the first air guide plate.

[0009] The adhesive tape is connected and bonded at both ends by hook-and-stick joints.

[0010] The operating platform is symmetrically fixed with two fixing rods on its inner side, and several of the air rings are fixedly connected to the two fixing rods via three fixing rods on both sides.

[0011] Fans are fixedly installed at the top and bottom of the operating platform. One end of each fan, located outside the air ring, is fixedly connected to an air duct. Two air ducts are respectively fixedly connected to half of the air rings in a through-type manner.

[0012] The technical effects achieved by this utility model are as follows: By setting several mirrored air rings for annular blowing, and by tilting the air direction through the first air guide plate, several airflow barriers are formed on the outside of the membrane bubble without affecting the traction of the membrane bubble, so as to block external dust and impurities and prevent dust from adhering to the membrane bubble. The dust-adhesive belt and dust-collecting bristles capture and adsorb dust that accidentally enters from the airflow collision zone, thereby reducing defects in the finished plastic film and improving product quality. Attached Figure Description

[0013] Figure 1 This is an overall view of the multilayer plastic co-extrusion equipment provided in the embodiments of this utility model;

[0014] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0015] Figure 3 This is an exploded view of the structure of the air ring provided in an embodiment of this utility model;

[0016] Figure 4 This is an exploded view of the connecting ring and dust-adhesive tape provided in the embodiments of this utility model;

[0017] Figure 5 This is a schematic diagram showing the overall structure of the air ring and its system provided in the embodiments of this utility model;

[0018] Figure 6 yes Figure 5 A magnified view of a section at point B.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1, operation platform; 101, wind ring; 102, air outlet; 103, second air deflector; 104, first air deflector; 105, fixed rod one; 106, link ring; 107, dust catching hair; 108, fixed rod two; 109, fixed rod three; 110, air pipe; 111, fan; 112, composite die; 113, dust sticking belt. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the utility model more clear and obvious, the utility model is specifically described below in combination with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the specific protection scope requested by the utility model.

[0022] As shown in Figures 1-3 , Figures 5-6 A multi-layer plastic co-extrusion equipment, comprising an operation platform 1, a plurality of wind rings 101 are vertically assembled in sequence in the middle of the operation platform 1, wherein the two wind rings 101 located at the top and bottom of the operation platform 1 are mirror image opposite, the wind rings 101 located in the middle of the operation platform 1 are arranged in several groups, one group is mirror image adhered two, a composite die 112 for extruding film bubble is fixedly arranged at the bottom of the operation platform 1, the wind rings 101 are arranged above the composite die 112, the top of the wind ring 101 is arrayed and opened through the air outlet 102, the first air deflector 104 for guiding the wind direction is fixedly connected to one side of the top of the wind ring 101 and located at the air outlet 102, the outer wall of the first air deflector 104 is arranged in arc shape, the outer diameter of one end of the first air deflector 104 is larger than that of the other end, the fixed rod two 108 is fixedly assembled on the inner side of the operation platform 1 symmetrically, the plurality of wind rings 101 are fixedly connected with the fixed rod two 108 through the fixed rod three 109 on both sides, the fan 111 is fixedly arranged at the top and bottom of the operation platform 1, the air pipe 110 is fixedly connected to one end of the fan 111 and located outside the wind ring 101, the two air pipes 110 are fixedly connected with half of the number of wind rings 101 through, the second air deflector 103 is fixedly connected to one side of the top edge of the wind ring 101 and located at the air outlet 102, the height of the second air deflector 103 is less than that of the first air deflector 104.

[0023] According to the above structure, in the prior art, the composite die head 112 is used to extrude the film bubble, the middle part of the operation platform 1 is provided with holes for vertically pulling the film bubble, and the air rings 101 are vertically arranged in the holes. The air rings 101, the first air deflectors 104 and the connecting rings 106 are all hollow annular structures in the middle part, so that the film bubble can be pulled. The second fixed rods 108 and the third fixed rods 109 provide support for the air rings 101. The two air blowers 111 at the top and bottom of the operation platform 1 are started to blow air to the air rings 101 above and below the middle part of the operation platform 1 respectively. The air flow passes through the air outlets 102 and is blown out. Since the air rings 101 are mirror images, the air outlets 102 of every two air rings 101 are opposite to each other. The two air rings 101 blow air to each other. The second air deflectors 103 and the first air deflectors 104 are arranged on both sides of the air outlets 102 to narrow the air flow and constrain the initial trajectory of the air flow. The first air deflectors 104 are provided with arc-shaped openings on the outer walls to change the direction of the air flow, so that the air flow is inclined outward to prevent the air flow from blowing to the film bubble. In the attached drawings, Figure 6 As can be seen, after being guided, the air flow forms a ring-shaped air flow barrier between the two first air deflectors 104, i.e. outside the film bubble. The two air flows meet at the air flow barrier to form a counter-attack air area. Near the counter-attack air area, vortexes are often formed. The suction force of the vortexes is large, and the pressure is unstable, which may cause dust to accidentally enter the inside of the air flow barrier.

[0024] Referring to the attached drawings, Figure 2 , Figure 4 The two first air deflectors 104 are fixedly connected by the first fixed rods 105 in a symmetrical manner. The outer walls of the two first fixed rods 105 are fixedly connected by the connecting ring 106. The outer wall of the connecting ring 106 is detachably sleeved with the dust sticking belt 113. The dust sticking belt 113 is connected and adhered by the hooking parts at both ends. The outer wall of the dust sticking belt 113 is fixedly connected with the dust catching hairs 107 in an array manner.

[0025] According to the above structure, the fixed rod one 105 is used for fixing the connecting ring 106, the two ends of the dust sticking belt 113 are hooking parts, which are a structure for hooking and sticking through hooking hair and hooking surface, and are most commonly used in magic stickers in the prior art, facilitating disassembly and assembly for cleaning the dust catching hair 107, the dust sticking belt 113 is sleeved on the outer wall of the connecting ring 106, and the connecting ring 106 is located inside the airflow collision area, the dust catching hair 107 is soft and dense wool, such as polyester fiber, when the dust catching hair 107 contacts the dust entering from the airflow collision area, the wool will bend and wrap the dust particles, and the adhesive coating will further enhance the adsorption of the dust, so that the dust is attached to the dust catching hair 107; the utility model discloses a plurality of mirror image setting wind rings 101 for annular blowing, the first air deflector 104 is used for tilting the wind direction, without affecting the traction of the film bubble, and a plurality of airflow barriers are formed on the outside of the film bubble to block external dust impurities, prevent dust from adhering to the film bubble, and capture and adsorb the dust accidentally entering from the airflow collision area through the dust sticking belt 113 and the dust catching hair 107, thereby reducing the defects of the plastic film product and improving the product quality.

[0026] The working principle of the utility model is as follows: in the prior art, the composite die head 112 is used for extruding the film bubble, the middle part of the operation platform 1 is provided with a hole for vertically pulling the film bubble, and the wind rings 101 are vertically and sequentially arranged in the holes, the wind ring 101, the first air deflector 104 and the connecting ring 106 are all annular with a hollow middle part for pulling the film bubble, the second fixed rod 108 and the third fixed rod 109 provide support for the wind ring 101, the fans 111 at the top and bottom of the operation platform 1 are started, the two fans 111 blow air to the wind rings 101 above the middle part and the wind rings 101 below the middle part of the operation platform 1 respectively, the airflow passes through the air outlet 102, and because the wind rings 101 are mirror images, the air outlets 102 of every two wind rings 101 are opposite to each other, the two wind rings 101 blow air to each other, the second air deflector 103 and the first air deflector 104 are arranged on the two sides of the air outlet 102 to narrow the airflow and constrain the initial track of the airflow, and the first air deflector 104 is provided with an arc on the outer wall to change the direction of the airflow, so that the airflow is inclined outward to prevent blowing to the film bubble, and the connecting ring 106 is arranged in the airflow collision area to prevent the dust from adhering to the film bubble. Figure 6It can be seen that the air flow forms a ring-shaped air flow barrier between the two first air deflectors 104, i.e. outside the membrane bubble, and a collision air area is formed at the intersection of the two air flows, and vortexes are often formed near the collision air area. The suction of the vortexes is large, the pressure is unstable, and dust may accidentally enter the inside of the air flow barrier. The fixed rod 105 is used to fix the connecting ring 106. The two ends of the dust sticking belt 113 are hooking parts, which are a structure of hooking and sticking through hooking and hooking surfaces. In the prior art, the most commonly used is Velcro, which is convenient for disassembly and cleaning of the dust catching hair 107. The dust sticking belt 113 is sleeved on the outer wall of the connecting ring 106, and the connecting ring 106 is located inside the air flow collision area. The dust catching hair 107 is made of soft and dense wool, such as polyester fiber. When the dust catching hair 107 contacts the dust entering from the air flow collision area, the wool will bend and wrap the dust particles. At the same time, the adhesive coating will further enhance the adsorption of the dust, so that the dust is attached to the dust catching hair 107.

[0027] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, unless otherwise specified and limited.

Claims

1. A multi-layer plastic co-extrusion equipment, comprising an operating platform (1), characterized in that: The operating platform (1) is vertically and sequentially assembled with several air rings (101) in the middle. Two air rings (101) located at the top and bottom of the operating platform (1) are mirror images of each other. The air rings (101) located in the middle of the operating platform (1) are arranged in several groups, with each group consisting of two mirror images of each other. An air outlet (102) is arrayed through the top of each air ring (101). A first air guide for guiding the airflow is fixedly connected to the top of each air ring (101) and to one side of the air outlet (102). A guide plate (104) is provided. The outer wall of the first guide plate (104) is arc-shaped. The outer diameter of one end of the first guide plate (104) is larger than that of the other end. Two first guide plates (104) are symmetrically fixedly connected with a fixing rod (105). The outer walls of the two fixing rods (105) are jointly fixedly connected with a connecting ring (106). The outer wall of the connecting ring (106) is detachably fitted with a dust-collecting tape (113). The outer wall of the dust-collecting tape (113) is fixedly connected with dust-collecting bristles (107) in an array.

2. The multi-layer plastic co-extrusion equipment according to claim 1, characterized in that: The bottom of the operating platform (1) is fixedly provided with a composite die head (112) for extruding film bubbles, and the air ring (101) is provided above the composite die head (112).

3. The multi-layer plastic co-extrusion equipment according to claim 1, characterized in that: A second air guide plate (103) is fixedly connected to the top edge of the air ring (101) and to one side of the air outlet (102). The height of the second air guide plate (103) is less than that of the first air guide plate (104).

4. A multi-layer plastic co-extrusion equipment according to claim 1, characterized in that: The adhesive tape (113) is connected and bonded by hooks at both ends.

5. A multi-layer plastic co-extrusion equipment according to claim 1, characterized in that: The operating platform (1) is symmetrically fixed with fixing rods two (108) on its inner side, and several of the air rings (101) are fixedly connected to the fixing rods two (108) through fixing rods three (109) on both sides.

6. A multi-layer plastic co-extrusion equipment according to claim 1, characterized in that: The top and bottom of the operating platform (1) are fixedly equipped with fans (111). One end of the fans (111) and the outside of the air rings (101) are fixedly connected with air ducts (110). The two air ducts (110) are respectively fixedly connected to half of the number of air rings (101).

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