Co-extrusion distributor for on-line stepless adjustment of width of surface layer raw material

Abstract

The co-extrusion distributor comprises a main machine feeding block, a main machine body and a discharging plate which are connected in sequence, a B material feeding channel is vertically formed in the main machine feeding block, a composite channel is vertically formed in the main machine body, an extrusion channel is vertically formed in the discharging plate, and a B material discharging channel is vertically formed in the discharging plate. A left core rod mounting hole and a right core rod mounting hole are transversely and inwards formed in the front side face of the main machine body, located in the left side and the right side of the composite channel respectively and communicated with the composite channel, the core rods are inserted into the core rod mounting holes to be mounted, the core rod cover plate is connected to the front side face of the main machine body to axially position the front end face of the core rods, and the front end heads of the core rods penetrate out of the core rod cover plate. Two A material feeding channels are correspondingly arranged in the left area and the right area of the rear side face of the main machine body, A material channels communicated with the A material feeding channels are arranged on the rear end face of the core rod, and tapered grooves for annularly cutting the core rod are formed in the areas, located on the two outer sides of the composite channel, of the core rod. The material A can be compounded on the two side faces of the material B, and the width of the material A can be steplessly adjusted without shutdown.

Description

Technical Field

[0001] The invention relates to the technical field of extrusion die head distributors, in particular to a co-extrusion distributor capable of online stepless adjustment of the width of surface layer raw materials. Background Art

[0002] The mandrel distributor is a multi-layer co-extrusion composite product suitable for the production of sheet materials and films. It is intended to achieve non-stop adjustment of the composite uniformity of the two surface layers and the width of the surface layer. During the composite process, the distributor requires that a variety of different raw materials be compounded together according to a certain rule. It is suitable for the production of sheet materials and film. At present, it is difficult to adjust the mandrel distributor in one go to achieve a uniform ratio of each layer. The main method of stopping the machine to replace the mandrel is to achieve the composite uniformity of the two surface layers and the width of the surface layer. The usage scenario is single, and during the adjustment process, it needs to be adjusted multiple times to take into account factors such as the changes in the fluidity of different raw materials during the composite process. During this period, it is easy to have the following problems: Figure 1 and Figure 2 For products in situations such as those shown in the figure, during this process, there is a lot of waste of raw materials due to multiple shutdowns for adjustments and the cycle is very long. Summary of the invention

[0003] In view of the above problems, the present invention aims to provide a co-extrusion distributor with online stepless adjustment of the width of the surface raw material, which can evenly compound material A on the surfaces of both sides of material B and achieve stepless adjustment of the width of material A without stopping the machine.

[0004] The technical solution of the present invention is a co-extrusion distributor for online stepless adjustment of the width of the surface raw material, characterized in that: it comprises a main feed block, a main body and a discharge plate connected in sequence from back to front, a B material feed channel is vertically arranged in the main feed block, a composite channel is vertically arranged in the main body, and an extrusion channel is vertically arranged on the discharge plate. The above three channels correspond to each other and are connected end to end. Two left and right mandrel mounting holes are horizontally arranged inward on the front side of the main body. The two mandrel mounting holes are respectively located on the left and right sides of the composite channel and are connected to each other. The mandrel is inserted into the mandrel mounting hole for installation. The mandrel cover plate is connected to the front side of the main body and is axially positioned facing the front end of the mandrel. The front end of the mandrel passes through the mandrel cover plate. Two A material feeding channels are correspondingly arranged in the left and right areas of the rear side of the main body. The rear end of the mandrel is provided with an A material channel connected with the A material feeding channel. The mandrel is located on both outer sides of the composite channel and is provided with gradient grooves that annularly cut the mandrel. The width of the gradient grooves gradually increases when rotating from one side to the other side, and the A material channel is connected to the narrowest position thereof. The different widths of the gradient grooves are controlled by rotating the mandrel to correspond to the surface of the composite channel, thereby realizing that A material of a specific width is compounded on the surface of B material.

[0005] Preferably, the shape of the gradient groove is symmetrical about the central cross section of the mandrel, the gradient groove on the mandrel is 180° apart from the narrowest end to the widest end, and the intermediate width transitions in a gentle gradient manner.

[0006] Preferably, the portion of the front end of the mandrel that passes through the mandrel cover plate is an external hexagonal structure for a wrench to engage.

[0007] Preferably, the outer side surface of the mandrel cover plate is provided with scale markings surrounding the mandrel area for facilitating reading of 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 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 core rod is less than or equal to the width of the composite channel.

[0010] The present invention can evenly compound the A material on the surfaces of both sides of the B material, and realize stepless adjustment of the width of the A material without stopping the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of a product structure in which material A is too short or too long, which is easy to occur when adjusting in the existing method; Figure 2 This is a schematic diagram of a product structure in which the thickness of material A is uneven, which is easy to occur when adjusting in the existing method; Figure 3 A schematic diagram of the product structure of the present invention; Figure 4 It is a structural schematic diagram of the present invention; Figure 5 for Figure 4 A schematic diagram of the structure from another perspective; Figure 6 for Figure 4 Exploded diagram of Figure 7 It is a structural schematic diagram of a transverse cross section at the center of the mandrel of the present invention; Figure 8 It is a structural schematic diagram of a longitudinal cross section of a core rod at a gradual groove of the present invention; Fig. 9 It is a structural schematic diagram of the core rod in the present invention; Among them: 1—main machine feed block; 11—B material feed channel; 2—main machine body; 21—composite channel; 22—mandrel mounting hole; 23—A material feed 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 mark. DETAILED DESCRIPTION

[0012] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0013] like Figures 3 to 9 As shown, the present invention provides a co-extrusion distributor for online stepless adjustment of the width of the surface layer raw material, comprising a main feed block 1, a main body 2 and a discharge plate 3 connected in sequence from back to front, wherein the main feed block 1 is vertically provided with a B material feed channel 11, the main body 2 is vertically provided with a composite channel 21, and the discharge plate 3 is vertically provided with an extrusion channel 31, the above three channels correspond to each other and are connected end to end, and the front side of the main body 2 is laterally provided with left and right mandrel mounting holes 22, the two mandrel mounting holes 22 are respectively 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, and the mandrel cover plate 5 is connected to the front side of the main body 2 for axial positioning facing the front end of the mandrel 4, the front end of the mandrel 4 passes through the mandrel cover plate 5, and two A material feeding channels 23 are correspondingly arranged in the left and right areas of the rear side of the main body 2, and the rear end of the mandrel 4 is provided with an A material channel 41 connected with the A material feeding channel 23. The mandrel 4 is located at the two outer areas of the composite channel 21 and is provided with a gradient groove 42 that annularly cuts the mandrel 4, and its width gradually increases when rotating from one side to the other side, and the A material channel 41 is connected 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, so that the A material of a specific width is compounded on the surface of the B material.

[0014] In the above scheme, the shape of the gradient groove 42 is symmetrical about the central cross section of the core rod 4. The gradient groove 42 on the core rod 4 is 180° apart from the narrowest end to the widest end, and the intermediate width transitions in a gentle gradient manner.

[0015] In addition, the portion of the front end of the mandrel 4 that passes through the mandrel cover plate 5 is an external hexagonal structure for a wrench to engage.

[0016] Specifically, a scale mark 51 for facilitating reading of the rotation angle of the mandrel 4 is provided on the outer side of the mandrel cover plate 5 surrounding the mandrel 4 .

[0017] In addition, the front end of the core rod 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, and the core rod cover plate 5 is connected to the main body 2 by screws to position the core rod 4 to prevent it from falling out.

[0018] Furthermore, the width of the widest end of the gradient groove 42 on the core rod 4 is less than or equal to the width of the composite channel 21 .

[0019] The working principle of the present invention is as follows: The B material enters from the B material feed channel 11 at the top of the main feed block 1 and reaches the composite channel 21 in the main body 2. The A material enters from the A material feed channel 23 at the rear of the main body 2 and reaches the A material channel 41 of the core rod 4. It flows to the composite channel 21 through the gradient groove 42, covers the left and right sides of the B material, and forms a composite material with an ABA composite structure. The width of the A material is achieved by rotating the core rod 4, wherein the center line of the gradient groove 42 on the core rod 4 coincides with the center line of the composite channel 21. When the core rod 4 rotates, the different width positions of the gradient groove 42 correspond to the composite channel 21. The rotation angle of the core rod 4 is further fine-tuned by observing and detecting the composite condition of the product coming out of the extrusion channel 31, and finally a qualified product is extruded from the extrusion channel 31.

[0020] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the invention. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A co-extrusion distributor for online stepless adjustment of the width of the surface material, characterized in that: The invention comprises a main machine feed block (1), a main machine body (2) and a discharge plate (3) which are connected in sequence from the back to the front, wherein a B material feed channel (11) is vertically arranged in the main machine feed block (1), a composite channel (21) is vertically arranged in the main machine body (2), and an extrusion channel (31) is vertically arranged on the discharge plate (3), wherein the three channels correspond to each other and are connected end to end, and two left and right mandrel mounting holes (22) are horizontally arranged inwardly on the front side of the main machine body (2), wherein the two mandrel mounting holes (22) are respectively located on the left and right sides of the composite channel (21) and are connected to each other, a mandrel (4) is inserted into the mandrel mounting hole (22) for installation, and a mandrel cover plate (5) is connected to the front side of the main machine body (2) and faces the mandrel. (4) The front end face is axially positioned, the front end of the mandrel (4) passes through the mandrel cover plate (5), two A material feed channels (23) are correspondingly arranged in the left and right areas 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) connected to the A material feed channel (23), and the mandrel (4) is provided with a gradient groove (42) that annularly cuts the mandrel (4) in the two outer areas of the composite channel (21), the width of which gradually increases when rotating from one side to the other side, and the A material channel (41) is connected to the narrowest position thereof; by rotating the mandrel (4), the different widths of the gradient groove (42) are controlled to correspond to the surface of the composite channel (21), thereby achieving the composite of A material of a specific width on the surface of B material.

2. The co-extrusion distributor for online stepless adjustment of the width of the surface layer material according to claim 1, characterized in that: The shape of the gradual groove (42) is symmetrical about the central cross section of the core rod (4); the gradual groove (42) on the core rod (4) is 180° apart from the narrowest end to the widest end, and the intermediate width transitions in a gentle gradual manner.

3. The co-extrusion distributor for online stepless adjustment of the width of the surface layer material according to claim 1, characterized in that: The portion of the front end of the mandrel (4) that passes through the mandrel cover plate (5) is an external hexagonal structure for a wrench to engage.

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

5. The co-extrusion distributor for online stepless adjustment of the width of the surface layer material according to claim 3, 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, and 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.

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

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