Multi-layer co-extrusion edge covering distributor

Abstract

The utility model relates to a multi-layer co-extrusion edging distributor which comprises a shell and a core rod, the shell is provided with a core rod installation cavity, a first main runner and a plurality of branch runners, the core rod is arranged in the core rod installation cavity in a penetrating mode, a core rod cover is detachably installed at the tail end of the core rod, and the core rod is provided with a plurality of first guide runners. Each first guide runner is communicated to the corresponding sub-runner, and the sub-runners are converged to the first main runner; the shell is further provided with a second main flow channel and two edge covering fluid channels. The core rod is further provided with two second guide flow channels, the two second guide flow channels are communicated with the corresponding edge covering fluid channels respectively, and the first main flow channel and the two edge covering fluid channels are converged to the second main flow channel. According to the multi-layer co-extrusion edge covering distributor, co-extrusion forming of multi-layer materials can be achieved on the premise that the number of extruders is not increased so that edge covering products can be manufactured, the equipment investment and the raw material cost can be reduced, the production flexibility can be improved, and the production requirements of small and medium-sized enterprises for low-cost and high-performance sheets can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fluid distribution device, in particular to a multi-layer co-extrusion edge-covering distributor. BACKGROUND

[0002] The high-barrier sheet material is a kind of packaging material with high oxygen resistance, water resistance and high permeability, which can play a good role in quality preservation, fresh-keeping and shelf life extension. This material not only has excellent processing performance, but also shows excellent blocking effect to other odors, spices, solvents, etc. High-barrier sheet material generally realizes high-performance barrier through multi-layer composite structure, and common high-barrier materials include ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride (PVDC) and polyamide (PA) etc.

[0003] However, due to the high cost of high-barrier materials (especially EVOH, PVDC, etc.), the production cost of sheet material is significantly increased. In order to reduce the cost, manufacturers usually use the "edge covering" process, that is, ordinary materials are used to replace high-barrier materials in the edge area of the sheet material. However, the existing edge covering technology relies on additional extruders to inject edge materials separately on both sides of the die, which increases equipment investment and energy consumption. For small-scale production enterprises, the configuration of multiple extruders brings heavy investment burden, which limits their technical upgrading and market competitiveness. In addition, although the existing technology also uses adhesive to composite multi-layer structure, the adhesive layer is prone to adhesion decline in low temperature environment, affecting the reliability of the sheet material in cold storage packaging, and cannot balance the cost and performance optimization.

[0004] Therefore, it is urgent to develop a multi-layer co-extrusion edge-covering distributor, which can realize the synchronous forming of multi-layer high-barrier composite in the middle area of the sheet material and single-layer edge covering without increasing the number of extruders, can significantly reduce equipment investment and the amount of high-barrier raw materials, while improving production flexibility to meet the production needs of small and medium-sized enterprises for low-cost and high-performance sheet materials. UTILITY MODEL CONTENT

[0005] The technical problem to be solved by the utility model is to provide a multi-layer co-extrusion edge-covering distributor with edge covering function. This multi-layer co-extrusion edge-covering distributor can realize co-extrusion forming of multi-layer materials to make edge covering products without increasing the number of extruders, which not only can reduce equipment investment and raw material cost, but also can improve production flexibility to meet the production needs of small and medium-sized enterprises for low-cost and high-performance sheet materials. The technical scheme adopted is as follows:

[0006] The utility model provides a multilayer co -extrusion edge covering distributor, including the shell and the plug, the shell is set up with the plug installation cavity, first main runner and a plurality of branch runner, the plug is passed in the plug installation cavity of shell, the end of plug is detachably installed with the plug cover, and the plug is set up with a plurality of first guide runner, and each first guide runner is connected to the corresponding branch runner, and each branch runner converges to the first main runner, characterized by: the shell is also equipped with second main runner and two edge covering fluid channels, and the second main runner is at the downside of the first main runner, and the two edge covering fluid channels are respectively at the left and right sides of the first main runner, and the plug is also set up with two second guide runners, and the two second guide runners are connected to the corresponding edge covering fluid channels, and the first main runner, two edge covering fluid channels converge to the second main runner.

[0007] Generally, the above-mentioned multilayer co-extrusion edge covering distributor is installed between the barrel of the sheet extruder and the extrusion die.

[0008] When working, the molten material sent from the sheet extruder is first distributed to each first guide runner and two second guide runners; then, the molten material in each first guide runner is respectively converged to the first main runner through the corresponding branch runner, thereby forming a multilayer composite sheet, while the molten material in the two second guide runners is respectively converged to the second main runner through the corresponding edge covering fluid channel, and finally collected with the multilayer composite sheet in the first main runner to form an edge covering product. This multilayer co-extrusion edge covering distributor can realize multilayer co-extrusion of the material to form an edge covering product, with a multilayer composite sheet in the middle region and single-layer material on both sides, and can make the sheet extruder multi-purpose, without the need to increase a new host machine, thereby saving the number of extruders and raw material costs.

[0009] As a preferred scheme of the utility model, the shell comprises a top seat, a mounting plate, a positioning plate, a first bus plate, a second bus plate and a die connecting plate arranged in sequence from top to bottom, the positioning plate, the first bus plate and the second bus plate are provided with die cavities, and V-shaped flow guide blocks are installed in the die cavities; the plug installation cavity is provided on the top seat, the upper portions of each branch runner and the upper portions of the two edge covering fluid channels are provided on the top seat and the mounting plate, the lower portions of each branch runner and the first main runner are provided on the V-shaped flow guide blocks, the V-shaped flow guide blocks and the inner walls of the die cavities jointly enclose the lower portions of the two second guide runners, and the second main runner is provided on the die connecting plate.

[0010] As a further preferred scheme of the utility model, two adjusting blocks are arranged on the positioning plate, and two position adjusting mechanisms are arranged on the positioning plate, the two adjusting blocks are respectively arranged on the left side and the right side of the V-shaped flow guide block, the two position adjusting mechanisms correspond to the two adjusting blocks respectively, and the position adjusting mechanism can adjust the position of the corresponding adjusting block in the left-right direction. The two position adjusting mechanisms can adjust the positions of the corresponding adjusting blocks in the left-right direction respectively, so that the gap size between the two adjusting blocks and the V-shaped flow guide block (i.e. the local width of the edge covering fluid channel) is adjusted, and thus the edge covering thickness ratio of the product can be adjusted to meet different product requirements.

[0011] As a further preferred scheme of the utility model, the adjusting block is slidably arranged between the mounting plate and the first bus plate to form a guide channel, and an adjusting screw hole is arranged on the adjusting block; the position adjusting mechanism comprises a positioning seat and an adjusting bolt, the positioning seat is fixedly installed on the positioning plate, the adjusting bolt is rotatably installed on the positioning seat and extends in the left-right direction, and the screw rod of the adjusting bolt is arranged in the adjusting screw hole on the corresponding adjusting block and is engaged with the adjusting screw hole. When adjusting, the adjusting bolt can be rotated to change the depth of the adjusting bolt inserted into the adjusting screw hole on the adjusting block, so that the adjusting block is driven to move leftward or rightward along the guide channel formed by the mounting plate and the first bus plate, and thus the position of the adjusting block in the left-right direction is adjusted.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] The multilayer co-extrusion edge covering distributor can realize the co-extrusion molding of the multilayer materials to manufacture the edge covering product without increasing the number of extruders, can reduce equipment investment and raw material cost, can improve production flexibility, and can meet the production requirements of small and medium-sized enterprises for low-cost and high-performance sheets. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structure schematic view of the multilayer co-extrusion edge covering distributor of the preferred embodiment of the utility model.

[0015] Figure 2 is Figure 1 is a sectional view of the edge covering product manufactured by the multilayer co-extrusion edge covering distributor. DETAILED DESCRIPTION

[0016] As Figure 1 , Figure 2As shown, the multi-layer co-extrusion rimmed dispenser comprises a housing 1 and a core rod 2, the housing 1 is provided with a core rod mounting cavity 101, a first main flow channel 102, a plurality of branch flow channels 103, a second main flow channel 104 and two rimmed fluid passages 105, the second main flow channel 104 is located at the lower side of the first main flow channel 102, and the two rimmed fluid passages 105 are respectively located at the left and right sides of the first main flow channel 102; the core rod 2 is arranged in the core rod mounting cavity 101 of the housing 1, and the end of the core rod 2 is detachably provided with a core rod cover 21, the core rod 2 is provided with a plurality of first guide flow channels 201 and two second guide flow channels 202, each first guide flow channel 201 is communicated to the corresponding branch flow channel 103, and each branch flow channel 103 is merged into the first main flow channel 102; the two second guide flow channels 202 are respectively communicated to the corresponding rimmed fluid passage 105, and the first main flow channel 102 and the two rimmed fluid passages 105 are merged into the second main flow channel 104.

[0017] In the embodiment, the shell 1 comprises, from top to bottom, a top base 11, a mounting plate 12, a positioning plate 13, a first bus plate 14, a second bus plate 15 and a die connecting plate 16, the positioning plate 13, the first bus plate 14 and the second bus plate 15 are provided with die cavities 10, and V-shaped flow guide blocks 17 are installed in the die cavities 10; a core rod mounting cavity 101 is provided on the top base 11, the upper portions of each of the distribution channels 103 and the upper portions of the two edge sealing fluid channels 105 are provided on the top base 11 and the mounting plate 12, the lower portions of each of the distribution channels 103 and the first main channel 102 are provided on the V-shaped flow guide block 17, the V-shaped flow guide block 17 and the inner wall of the die cavity 10 jointly form the lower portions of the two second guide channels 202, and the second main channel 104 is provided on the die connecting plate 16; the positioning plate 13 is provided with two adjusting blocks 18 and two position adjusting mechanisms 19, the two adjusting blocks 18 are respectively located on the left and right sides of the V-shaped flow guide block 17, and the adjusting blocks 18 are slidably arranged in the guide channel formed between the mounting plate 12 and the first bus plate 14, and the adjusting blocks 18 are provided with adjusting screw holes (not shown in the figure); the two position adjusting mechanisms 19 correspond to the two adjusting blocks 18 one by one, the position adjusting mechanism 19 comprises a positioning seat 191 and an adjusting bolt 192, the positioning seat 191 is fixedly installed on the positioning plate 13, the adjusting bolt 192 is rotatably installed on the positioning seat 191 and extends leftward and rightward, and the screw rod of the adjusting bolt 192 is inserted into and engaged with the adjusting screw hole on the corresponding adjusting block 18. The two position adjusting mechanisms 19 can respectively adjust the positions of the corresponding adjusting blocks 18 in the leftward and rightward directions; during adjustment, the adjusting bolt 192 is rotated to change the depth of the adjusting bolt 192 inserted into the adjusting screw hole on the adjusting block 18, and the adjusting block 18 is driven to move leftward or rightward along the guide channel formed by the mounting plate 12 and the first bus plate 14, so that the position of the adjusting block 18 in the leftward and rightward directions is adjusted, and the gap size (i.e., the local width of the edge sealing fluid channel 105) between the two adjusting blocks 18 and the V-shaped flow guide block 17 is adjusted, so that the thickness ratio of the edge seal 502 of the edge sealing product 50 is adjusted to meet different product requirements.

[0018] The working principle of the multi-layer co-extrusion edge sealing distributor will be briefly described as follows:

[0019] The multi-layer co-extrusion edge sealing distributor is installed between the barrel of the sheet extruder and the extrusion die, and the extrusion die is installed on the die connecting plate 16 of the shell 1.

[0020] In operation, the molten material from the sheet extruder is first divided into the first guide channels 201 and the second guide channels 202. Then, the molten material in each first guide channel 201 is merged into the first main channel 102 through the corresponding branch channel 103, thereby forming a multi-layer composite sheet. Meanwhile, the molten material in each second guide channel 202 is merged into the second main channel 104 through the corresponding edge wrapping flow channel 105, and finally merged with the multi-layer composite sheet in the first main channel 102 to form an edge-wrapped product 50, which includes a multi-layer composite sheet 501 in a middle region and an edge wrapping 502 around the multi-layer composite sheet 501.

[0021] In addition, it should be noted that the specific embodiments described in the specification, the name of each part, etc. can be different, and any equivalent or simple changes made in accordance with the structure, features and principles of the utility model patent concept are included in the protection scope of the utility model patent. Those skilled in the art of the utility model can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, which should belong to the protection scope of the utility model.

Claims

1. A multi-layer co-extrusion rimmed dispenser, comprising a housing and a core rod, the housing is provided with a core rod mounting cavity, a first main flow channel and a plurality of branch flow channels, the core rod is arranged in the core rod mounting cavity of the housing, a core rod cover is detachably mounted on the end of the core rod, the core rod is provided with a plurality of first guide flow channels, each first guide flow channel is communicated to a corresponding branch flow channel, and each branch flow channel is merged into the first main flow channel; characterized in that: The shell is further provided with a second main flow channel and two edge wrapping fluid channels, the second main flow channel is located at the lower side of the first main flow channel, and the two edge wrapping fluid channels are respectively located at the left and right sides of the first main flow channel; the mandrel is further provided with two second guide flow channels, the two second guide flow channels are respectively communicated to the corresponding edge wrapping fluid channels, and the first main flow channel and the two edge wrapping fluid channels converge to the second main flow channel.

2. A multi-layer co-extrusion rimmed dispenser according to claim 1, wherein: The shell comprises a top seat, a mounting plate, a positioning plate, a first bus plate, a second bus plate and a die connecting plate arranged in sequence from top to bottom, the positioning plate, the first bus plate and the second bus plate are provided with die cavities, and V-shaped guide blocks are arranged in the die cavities; the mandrel mounting cavity is arranged on the top seat, the upper portions of the plurality of shunt channels and the upper portions of the two edge wrapping fluid channels are arranged on the top seat and the mounting plate, the lower portions of the plurality of shunt channels and the first main flow channel are arranged on the V-shaped guide blocks, the V-shaped guide blocks and the inner walls of the die cavities jointly form the lower portions of the two second guide flow channels, and the second main flow channel is arranged on the die connecting plate.

3. A multi-layer co-extrusion rimmed dispenser according to claim 2, wherein: The positioning plate is provided with two adjusting blocks and two position adjusting mechanisms, the two adjusting blocks are respectively located at the left and right sides of the V-shaped guide blocks, the two position adjusting mechanisms correspond to the two adjusting blocks in one-to-one manner, and the position adjusting mechanisms can adjust the positions of the corresponding adjusting blocks in the left-right direction.

4. A multi-layer co-extrusion rimmed dispenser according to claim 3, wherein: The adjusting blocks are slidably arranged in a guide channel formed between the mounting plate and the first bus plate, and the adjusting blocks are provided with adjusting screw holes; the position adjusting mechanism comprises a positioning seat and an adjusting bolt, the positioning seat is fixedly arranged on the positioning plate, the adjusting bolt is rotatably arranged on the positioning seat and extends in the left-right direction, and the screw rod of the adjusting bolt is arranged in and engaged with the adjusting screw hole on the corresponding adjusting block.

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