A co-extrusion distributor for on-line stepless adjustment of the width of a surface material

Abstract

This invention provides a co-extrusion distributor for online stepless adjustment of the width of surface raw material, comprising a main feed block, a main body, and an outlet plate connected in sequence. The main feed block has a vertically arranged B-material feeding channel, the main body has a vertically arranged composite channel, and the outlet plate has a vertically arranged extrusion channel. The front side of the main body has two mandrel mounting holes, located on the left and right sides of the composite channel and communicating with it. Mandrels are inserted into the mandrel mounting holes for installation. A mandrel cover plate is connected to the front side of the main body to axially position the front end face of the mandrel, with the mandrel's front end protruding through the mandrel cover plate. The rear side of the main body has two corresponding A-material feeding channels on the left and right sides. The rear end face of the mandrel has an A-material channel communicating with the A-material feeding channels. The mandrel has circumferentially cut gradient grooves on both outer sides of the composite channel. This invention can composite A-material onto both sides of B-material, achieving stepless adjustment of the A-material width without stopping the machine.

Description

Technical Field

[0001] This invention relates to the field of extrusion die distributor technology, and in particular to a co-extrusion distributor for online stepless adjustment of the width of the surface material. Background Technology

[0002] Mandrel distributors are multi-layer co-extrusion composite products suitable for the production of sheets, films, and films. They aim to achieve uniformity and width of the composite layers without stopping the machine. During the lamination process, the distributor is required to combine multiple different raw materials according to a specific pattern. It is suitable for producing sheets, films, and films. Currently, mandrel distributors are difficult to adjust in one go to achieve uniformity in the proportions of each layer. The main method is to stop the machine and replace the mandrel to achieve uniformity in the composite layers and width of the surface. This limits its application scenarios, and the adjustment process requires multiple adjustments to account for changes in the flowability of different raw materials during lamination. This process can easily lead to problems such as… Figure 1 and Figure 2 For products exhibiting the aforementioned conditions, the process involves numerous machine shutdowns for adjustments, resulting in significant raw material waste and a lengthy cycle. Summary of the Invention

[0003] To address the aforementioned problems, this invention aims to provide a co-extrusion distributor with online stepless adjustment of the width of the surface material, which can uniformly composite material A on both sides of material B and achieve stepless adjustment of the width of material A without stopping the machine.

[0004] The technical solution of this invention is a co-extrusion distributor with online stepless adjustment of the width of the surface raw material. Its features include: a main feed block, a main body, and an outlet plate connected sequentially from back to front; a B-material feeding channel vertically arranged inside the main feed block; a composite channel vertically arranged inside the main body; and an extrusion channel vertically arranged on the outlet plate. These three channels correspond to each other and are connected end-to-end. Two mandrel mounting holes are arranged laterally inward on the front side of the main body, located on the left and right sides of the composite channel and connected to it. Mandrels are inserted into the mandrel mounting holes for installation. The mandrel cover plate is connected to the front side of the main body and axially positions the front end face of the mandrel. The front end of the mandrel protrudes through the mandrel cover plate. Two A material feeding channels are correspondingly provided on the left and right sides of the rear side of the main body. An A material channel communicating with the A material feeding channel is provided on the rear end face of the mandrel. The mandrel is provided with a ring-cut mandrel gradient groove on both outer sides of the composite channel. Its width gradually increases as it rotates from one side to the other. The A material channel connects to its narrowest position. By rotating the mandrel, the different widths of the gradient groove correspond to the surface of the composite channel, thereby realizing the composite of A material of a specific width on the surface of B material.

[0005] Preferably, the shape of the gradient groove is symmetrical about the central cross section of the mandrel, and the gradient groove on the mandrel is spaced 180° apart from the narrowest end to the widest end, with the width in the middle gradually changing.

[0006] Preferably, the portion of the mandrel tip that protrudes from the mandrel cover plate is an external hexagonal structure for engaging with a wrench.

[0007] Preferably, the outer side of the mandrel cover plate is provided with scale markings around the mandrel area to facilitate reading the mandrel rotation angle.

[0008] Preferably, the front end of the mandrel is provided with an annular protruding limiting step, the rear side of the limiting step contacts the front side of the main body for positioning, and the mandrel cover plate is connected to the main body by screws to position the mandrel and prevent it from falling out.

[0009] Preferably, the width of the widest end of the gradient groove on the mandrel is less than or equal to the width of the composite channel.

[0010] This invention can uniformly composite material A onto both sides of material B, and achieve stepless adjustment of the width of material A without stopping the machine. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a product structure where material A is either too short or too long when adjusting using existing methods;

[0012] Figure 2 This is a schematic diagram of a product structure where uneven thickness of material A is easily encountered when adjusting it using existing methods.

[0013] Figure 3 This is a schematic diagram of the structure of a product according to the present invention;

[0014] Figure 4 This is a schematic diagram of the structure of the present invention;

[0015] Figure 5 for Figure 4 A structural diagram from another perspective;

[0016] Figure 6 for Figure 4 Exploded view;

[0017] Figure 7 This is a schematic diagram of the transverse cross-section at the center of the mandrel of the present invention;

[0018] Figure 8 This is a schematic diagram of the longitudinal cross-section of the mandrel with gradient groove in this invention;

[0019] Figure 9 This is a schematic diagram of the structure of the mandrel in this invention;

[0020] Wherein: 1—Main feeding block; 11—B material feeding channel; 2—Main body; 21—Composite channel; 22—Mandrel mounting hole; 23—A material feeding channel; 3—Discharge plate; 31—Extrusion channel; 4—Mandrel; 41—A material channel; 42—Gradient groove; 43—Limiting step; 5—Mandrel cover plate; 51—Scale marking. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] like Figures 3 to 9 As shown, this invention provides an online stepless adjustment co-extrusion distributor for the width of surface raw materials, comprising a main feed block 1, a main body 2, and an outlet plate 3 connected sequentially from back to front. The main feed block 1 has a vertically arranged B-material feeding channel 11, the main body 2 has a vertically arranged composite channel 21, and the outlet plate 3 has a vertically arranged extrusion channel 31. These three channels correspond to each other and are connected end-to-end. The front side of the main body 2 has two mandrel mounting holes 22 arranged laterally inwards. The two mandrel mounting holes 22 are located on the left and right sides of the composite channel 21 and are interconnected. Mandrels 4 are inserted into the mandrel mounting holes 22 for installation. A mandrel cover plate is also provided. 5 is connected to the front side of the main body 2 and axially positions the front end face of the mandrel 4. The front end of the mandrel 4 protrudes through the mandrel cover plate 5. Two A material feeding channels 23 are correspondingly provided on the left and right sides of the rear side of the main body 2. The rear end face of the mandrel 4 is provided with an A material channel 41 that communicates with the A material feeding channel 23. The mandrel 4 is provided with a ring-cut gradient groove 42 on both outer sides of the composite channel 21. Its width gradually increases as it rotates from one side to the other. The A material channel 41 connects to its narrowest position. By rotating the mandrel 4, different widths of the gradient groove 42 are controlled to correspond to the surface of the composite channel 21, thereby realizing the composite of A material of a specific width on the surface of B material.

[0023] In the above scheme, the shape of the gradient groove 42 is symmetrical about the central cross section of the mandrel 4. The gradient groove 42 on the mandrel 4 is spaced 180° apart from the narrowest end to the widest end, and the width in the middle is gradually transitioned.

[0024] In addition, the part of the mandrel 4 that protrudes from the mandrel cover plate 5 is an external hexagonal structure for the wrench to engage.

[0025] Specifically, the outer side of the mandrel cover plate 5 is provided with scale markings 51 around the mandrel 4 area to facilitate reading the rotation angle of the mandrel 4.

[0026] In addition, the front end of the mandrel 4 is provided with an annular protruding limiting step 43. The rear side of the limiting step 43 contacts the front side of the main body 2 for positioning. The mandrel cover plate 5 is connected to the main body 2 by screws and positions the mandrel 4 to prevent it from falling out.

[0027] Furthermore, the width of the widest end of the gradient groove 42 on the mandrel 4 is less than or equal to the width of the composite channel 21.

[0028] The working principle of this invention is as follows:

[0029] Raw material B enters through the B material feeding channel 11 at the top of the main feed block 1 and reaches the composite channel 21 inside the main body 2. Raw material A enters through the A material feeding channel 23 at the rear of the main body 2 and reaches the A material channel 41 of the mandrel 4. It then flows through the gradient groove 42 to the composite channel 21, covering the left and right sides of the B material to form a composite material with an ABA composite structure. The width of the A material is achieved by rotating the mandrel 4, with the center line of the gradient groove 42 on the mandrel 4 coinciding with the center line of the composite channel 21. As the mandrel 4 rotates, the different width positions of the gradient groove 42 correspond to the composite channel 21. By observing and detecting the composite status of the product coming out of the extrusion channel 31, the rotation angle of the mandrel 4 is further fine-tuned until a qualified product is extruded at the extrusion channel 31.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A co-extrusion distributor for on-line stepless adjustment of the width of a surface material, characterized in that: The main body includes a main feed block (1), a main body (2), and a discharge plate (3) connected sequentially from back to front. The main feed block (1) has a vertical feed channel (11) for material B, the main body (2) has a vertical composite channel (21), and the discharge plate (3) has a vertical extrusion channel (31). The three channels are corresponding and connected end to end. The front side of the main body (2) has two mandrel mounting holes (22) arranged horizontally inward. The two mandrel mounting holes (22) are located on the left and right sides of the composite channel (21) and are connected to each other. The mandrel (4) is inserted into the mandrel mounting hole (22) for installation. The mandrel cover plate (5) is connected to the front side of the main body (2) to axially position the front end face of the mandrel (4). The front end of the mandrel (4) protrudes through the mandrel cover plate (5). (2) Two A material feeding channels (23) are provided on the left and right sides of the rear side. The rear end face of the mandrel (4) is provided with an A material channel (41) that communicates with the A material feeding channel (23). The mandrel (4) is provided with a ring-cut mandrel (4) with a gradient groove (42) on the two outer sides of the composite channel (21). Its width gradually increases as it rotates from one side to the other side. The A material channel (41) connects to its narrowest position. By rotating the mandrel (4), the different widths of the gradient groove (42) correspond to the surface of the composite channel (21), thereby achieving A material composite of a specific width on the surface of B material. The shape of the gradient groove (42) is symmetrical about the central section of the mandrel (4). The gradient groove (42) on the mandrel (4) is 180° apart from the narrowest end to the widest end, and the width in the middle is gradually transitioned.

2. The co-extrusion distributor for online stepless adjustment of surface material width according to claim 1, characterized in that: The part of the mandrel (4) that protrudes from the mandrel cover plate (5) is an external hexagonal structure for the wrench to engage.

3. The co-extrusion distributor for online stepless adjustment of surface material width according to claim 2, characterized in that: The outer side of the mandrel cover plate (5) is provided with scale markings (51) around the mandrel (4) area to facilitate reading the rotation angle of the mandrel (4).

4. The co-extrusion distributor for online stepless adjustment of surface material width according to claim 2, characterized in that: The front end of the mandrel (4) is provided with an annular protruding limiting step (43). The rear side of the limiting step (43) contacts the front side of the main body (2) for positioning. The mandrel cover plate (5) is connected to the main body (2) by screws and positions the mandrel (4) to prevent it from falling out.

5. The co-extrusion distributor for online stepless adjustment of surface material width according to claim 1, characterized in that: The width of the widest end of the gradient groove (42) on the mandrel (4) is less than or equal to the width of the composite channel (21).

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