A wet extrusion die for producing high-strength coated sheet products

Abstract

The present invention provides an infiltration extrusion die head for producing high-strength coated sheet products, comprising a left baffle and a right baffle, a preheating body is arranged between the left baffle and the right baffle, an upper die body, an upper middle die body, a lower middle die body and a lower die body are arranged in front of the preheating body from top to bottom, a die lip is arranged at the intersection of the front ends of the upper middle die body and the lower middle die body, an upper feed port and an upper flow channel are arranged between the upper die body and the upper middle die body, a lower feed port and a lower flow channel are arranged between the lower middle die body and the lower die body, a wavy melt infiltration channel is arranged between the upper middle die body and the lower middle die body, a substrate channel is arranged on the preheating body, and the substrate passes through the substrate channel and merges with the molten plastic in the upper flow channel and the lower flow channel, enters the wavy melt infiltration channel, is fully mixed and infiltrated, and finally extruded from the die lip. The present invention can ensure that the plastic and the substrate can be fully infiltrated, so that the product has high strength and good surface quality.

Description

Technical Field

[0001] The invention relates to an extrusion die head, in particular to an impregnation extrusion die head for producing high-strength cladding sheet products. Background Art

[0002] In our daily life, we need to use a lot of high-strength coated sheet products, whose structure includes a substrate such as glass fiber or carbon fiber inside, and a plastic coated on the outside of the substrate. Products with this sheet structure are generally produced through an extrusion die to ensure high production efficiency. At present, the extrusion dies used to produce such coated sheet products are all single-sided flow channel structures. When producing coated sheet products, this type of extrusion die sometimes causes uneven penetration between the plastic melt and the substrate, which in turn causes the final product to have defects such as insufficient overall strength and poor surface quality, and cannot meet product quality requirements. Summary of the invention

[0003] In view of the above problems, the present invention aims to provide an infiltration extrusion die for producing high-strength coated sheet products, which ensures that the plastic and the substrate can be fully infiltrated by arranging a double-sided plastic feed flow channel structure on the upper and lower sides of the substrate channel, so as to ensure that the product has high strength and good surface quality.

[0004] The technical solution of the present invention is an infiltration extrusion die head for producing high-strength coated sheet products, comprising a left baffle and a right baffle, a preheating body is arranged between the left baffle and the right baffle, an upper die body, an upper middle die body, a lower middle die body and a lower die body are arranged in front of the preheating body from top to bottom, a die lip is arranged at the intersection of the front ends of the upper middle die body and the lower middle die body, an upper feed port and an upper flow channel are arranged between the upper die body and the upper middle die body, a lower feed port and a lower flow channel are arranged between the lower middle die body and the lower die body, a wavy melt infiltration channel is arranged between the upper middle die body and the lower middle die, a substrate channel is arranged on the preheating body, and the substrate passes through the substrate channel and merges with the molten plastics in the upper and lower flow channels, then enters the wavy melt infiltration channel to be fully mixed and infiltrated and finally extruded from the die lip.

[0005] Preferably, the upper middle mold body is provided with lower bosses at the lower troughs of the wavy melt infiltration channel at its left and right ends along the width direction to prevent the substrate from sliding outward to the left and right sides, and the lower middle mold body is provided with upper bosses at the upper crests of the wavy melt infiltration channel at its left and right ends along the width direction to prevent the substrate from sliding outward.

[0006] Preferably, an upper merging flow channel connected to the upper flow channel is arranged between the preheating body and the upper middle mold body, a lower merging flow channel connected to the lower flow channel is arranged between the preheating body and the lower middle mold body, and a material merging flow channel connected to the wavy melt infiltration channel is arranged in the rear end area between the upper middle mold body and the lower middle mold body. The substrate enters from the substrate channel, and the molten plastic enters from the upper feed port through the upper flow channel and the upper merging flow channel on the one hand, and enters from the lower feed port through the lower flow channel and the lower merging flow channel on the other hand. The three merge and coat at the material merging flow channel, and are extruded from the die lip after being fully infiltrated through the wavy melt infiltration channel.

[0007] Preferably, the upper mold body and the upper middle mold body are connected by screws, the lower mold body and the lower middle mold body are connected by screws, the rear ends of the upper mold body and the lower mold body are connected to the preheating body by screws, the left baffle is connected to the left outer surface of the upper mold body and the lower mold body by screws, and the right baffle is connected to the right outer surface of the upper mold body and the lower mold body by screws.

[0008] Preferably, the front end of the die lip is a pointed conical structure, and the angle between the upper and lower inclined surfaces of the front end of the die lip and the horizontal direction is between 20° and 30°.

[0009] Preferably, the upper and lower inclined surfaces at the front end of the die lip are arc-shaped surfaces, and the curvature of the arc-shaped surface is adapted to the curvature of the surface of the roller behind it.

[0010] Preferably, a die lip heating rod is provided at the die lip.

[0011] Preferably, the horizontal distance L between the front end of the die lip and the center of the roller is less than 100 mm.

[0012] Preferably, the upper mold body is evenly provided with fine-tuning screws along the width direction, and the upper intermediate mold body is provided with adjustment slots along the width direction. The fine-tuning screws pass through the adjustment slots and abut against the die lip to adjust the gap of the die lip.

[0013] The present invention arranges a double-sided plastic feed flow channel structure on the upper and lower sides of the substrate channel, so that the plastic melt can cover the substrate more fully and the wetting uniformity is good, so as to ensure that the plastic and the substrate can be fully and fully infiltrated, so that the overall strength of the product is high and the surface quality is good; at the same time, a preheating body is provided, so that the temperature of the substrate before entering the infiltrating melt for coating is close to the melt temperature, which is conducive to the plastic melt coating the substrate; the front end of the die lip is pointed, so that the die lip outlet is as close to the roller as possible; the die lip is provided with a heating device, so that the extrusion is smoother; the wavy melt infiltration channel design makes the melt and the substrate infiltrated uniformly; bosses are provided at both ends of the die body to prevent the substrate from slipping outward, so as to prevent the substrates such as glass fiber and carbon fiber from being stuck in the gap between the baffle and the middle film body and affecting the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of the present invention;

[0015] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0016] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0017] Figure 4 for Figure 3 The schematic diagram of the structure after partial enlargement of A in the middle;

[0018] Figure 5 for Figure 4 Schematic diagram of the local structure in side view;

[0019] Figure 6 An exploded view of the present invention;

[0020] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0021] Among them: 1—left baffle; 2—right baffle; 3—preheating body; 4—upper mold body; 5—upper middle mold body; 6—lower middle mold body; 7—lower mold body; 8—die lip; 9—upper feed port; 10—upper flow channel; 11—lower feed port; 12—lower flow channel; 13—wavy melt infiltration channel; 14—substrate channel; 15—lower boss; 16—upper boss; 17—upper converging flow channel; 18—lower converging flow channel; 19—material converging flow channel; 20—die lip heating rod; 21—fine-tuning screw; 22—adjustment slot. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 7As shown, the present invention provides an impregnation extrusion die head for producing high-strength coated sheet products, including a left baffle 1 and a right baffle 2, a preheating body 3 is arranged between the left baffle 1 and the right baffle 2, a heating rod is arranged in the preheating body 3, an upper die body 4, an upper middle die body 5, a lower middle die body 6 and a lower die body 7 are arranged in front of the preheating body 3 from top to bottom, a die lip 8 is arranged at the intersection of the front ends of the upper middle die body 5 and the lower middle die 6, and the upper die body 4 and the upper middle die body 5 are respectively arranged at the front ends of the upper middle die body 5 and the lower middle die body 6. 5, an upper feed port 9 and an upper flow channel 10 are arranged between the lower middle mold body 6 and the lower mold body 7, a lower feed port 11 and a lower flow channel 12 are arranged between the upper middle mold body 5 and the lower middle mold body 6, and a substrate channel 14 is arranged on the preheating body 3. The substrate passes through the substrate channel 14 and merges with the molten plastic in the upper flow channel 10 and the lower flow channel 12, then enters the wavy melt infiltration channel 13 for full mixing and infiltration and is finally extruded from the die lip 8.

[0024] Preferably, the upper middle mold body 5 is provided with lower bosses 15 at the lower troughs of the wavy melt infiltration channel 13 at its left and right ends along the width direction to prevent the substrate from sliding outward to the left and right sides, and the lower middle mold body 6 is provided with upper bosses 16 at the upper crests of the wavy melt infiltration channel 13 at its left and right ends along the width direction to prevent the substrate from sliding outward, so as to prevent the substrates such as glass fiber and carbon fiber from entering and getting stuck in the gap between the left and right baffles 1, 2 and the upper and lower middle mold bodies 5, 6 during the forward movement, thereby affecting the entire extrusion process and product quality.

[0025] Preferably, an upper merging flow channel 17 connected to the upper flow channel 10 is arranged between the preheating body 3 and the upper intermediate mold body 5, a lower merging flow channel 18 connected to the lower flow channel 12 is arranged between the preheating body 3 and the lower intermediate mold body 6, and a material merging flow channel 19 connected to the wavy melt infiltration channel 13 is arranged in the rear end area between the upper intermediate mold body 5 and the lower intermediate mold body 6. The substrate enters from the substrate channel 14, and the molten plastic enters from the upper feed port 9 through the upper flow channel 10 and the upper merging flow channel 17 on the one hand, and enters from the lower feed port 10 through the lower flow channel 12 and the lower merging flow channel 18 on the other hand. The three merge and coat at the material merging flow channel 19, and are extruded from the die lip 8 after being fully infiltrated by the wavy melt infiltration channel 13.

[0026] Preferably, the upper mold body 4 and the upper middle mold body 5 are connected by screws, the lower mold body 7 and the lower middle mold body 6 are connected by screws, the rear ends of the upper mold body 4 and the lower mold body 7 are connected to the preheating body 3 by screws, the left baffle 1 is connected to the left outer surface of the upper mold body 4 and the lower mold body 7 by screws, and the right baffle 2 is connected to the right outer surface of the upper mold body 4 and the lower mold body 7 by screws. The connection is reliable and easy to disassemble and assemble.

[0027] Preferably, the front end of the die lip 8 is a pointed conical structure, and the angle between the upper and lower inclined surfaces of the front end of the die lip 8 and the horizontal direction is between 20° and 30°, so that the outlet of the die lip 8 is as close to the roller as possible.

[0028] Preferably, the upper and lower inclined surfaces at the front end of the die lip 8 are arc-shaped surfaces, and the curvature of the arc-shaped surface is adapted to the curvature of the roller surface behind it.

[0029] Preferably, a die lip heating rod 20 is provided at the die lip 8 so that the temperature at the die lip 8 is maintained at a suitable state to facilitate the extrusion of the product.

[0030] Preferably, the horizontal distance L between the front end of the die lip 8 and the center of the roller is less than 100 mm, so that the outlet of the die lip 8 is close to the roller, which is convenient for extrusion molding of the sheet.

[0031] Preferably, the upper mold body 4 is evenly provided with fine-tuning screws 21 along the width direction, and the upper intermediate mold body 5 is provided with adjustment slots 22 along the width direction. The fine-tuning screws 21 pass through the adjustment slots 22 and abut against the die lip 8 to adjust the gap of the die lip 8.

[0032] When in use, the preheating body 3 is kept in a heating state, and the temperature is set according to actual needs. Glass fiber, carbon fiber and other substrates enter from the substrate channel 14 of the preheating body 3. At the same time, the molten plastic enters from the upper feed port 9 through the upper flow channel 10 and the upper converging flow channel 17 on the one hand, and enters from the lower feed port 10 through the lower flow channel 12 and the lower converging flow channel 18 on the other hand. The three merge at the material converging flow channel 19, and the upper molten plastic enters from above the substrate and begins to cover the upper surface of the substrate and on the substrate. The molten plastic below enters from below the substrate and begins to cover the lower surface of the substrate, and penetrates and infiltrates from bottom to top in the substrate, and then the three enter the wavy melt infiltration channel 13 together, and the substrate and the plastic melt advance in a wavy shape to achieve full infiltration. During the advancement, under the guidance of the lower boss 15 and the upper boss 16 on the left and right sides, the substrate advances forward and will not get stuck in the gaps on both sides, and is finally smoothly extruded from the die lip 8 to the roller to be extruded into a sheet product.

[0033] 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. An impregnation extrusion die head for producing high-strength coated sheet products, characterized in that: The invention comprises a left baffle plate (1) and a right baffle plate (2), wherein a preheating machine body (3) is arranged between the left baffle plate (1) and the right baffle plate (2), wherein an upper mold body (4), an upper middle mold body (5), a lower middle mold body (6) and a lower mold body (7) are arranged in front of the preheating machine body (3) from top to bottom, respectively, wherein a mold lip (8) is arranged at the intersection of the front ends of the upper middle mold body (5) and the lower middle mold body (6), an upper feed port (9) and an upper flow channel (10) are arranged between the upper mold body (4) and the upper middle mold body (5), a lower feed port (11) and a lower flow channel (12) are arranged between the lower middle mold body (6) and the lower mold body (7), and the upper middle mold body (5) and the lower middle mold body (6) are arranged at the intersection of the front ends of the upper middle mold body (5) and the lower middle mold body (6). ) are provided between the upper and lower runners (10), and a substrate channel (14) is provided on the preheating machine body (3). The substrate passes through the substrate channel (14) and merges with the molten plastic in the upper runner (10) and the lower runner (12), and then enters the wavy melt infiltration channel (13) to be fully mixed and infiltrated and finally extruded from the die lip (8); the upper intermediate mold body (5) is provided with lower bosses (15) at the lower troughs of the wavy melt infiltration channel (13) at its left and right ends along the width direction, and the lower intermediate mold body (6) is provided with lower bosses (15) at the upper crests of the wavy melt infiltration channel (13) to prevent the substrate from sliding outward to the left and right sides. An upper boss (16) for sliding outwards of the substrate; an upper converging flow channel (17) communicating with the upper flow channel (10) is provided between the preheating body (3) and the upper intermediate mold body (5); a lower converging flow channel (18) communicating with the lower flow channel (12) is provided between the preheating body (3) and the lower intermediate mold body (6); a material converging flow channel (19) communicating with the wavy melt infiltration channel (13) is provided at the rear end area between the upper intermediate mold body (5) and the lower intermediate mold body (6); the substrate enters from the substrate channel (14); the molten plastic enters from the upper feed port (9) through the upper flow channel (10) and the upper converging flow channel (17) on the one hand, and from the lower feed port (11) on the other hand. After entering through the lower flow channel (12) and the lower converging flow channel (18), the three converge and wrap at the material converging flow channel (19), and are fully infiltrated through the wavy melt infiltration channel (13) before being extruded from the die lip (8); the upper mold body (4) and the upper middle mold body (5) are connected by screws, the lower mold body (7) and the lower middle mold body (6) are connected by screws, the rear ends of the upper mold body (4) and the lower mold body (7) are both connected to the preheating body (3) by screws, the left baffle (1) is connected to the left outer surface of the upper mold body (4) and the lower mold body (7) by screws, and the right baffle (2) is connected to the right outer surface of the upper mold body (4) and the lower mold body (7) by screws.

2. The wet extrusion die head for producing high-strength coated sheet products according to claim 1, characterized in that: The front end of the die lip (8) is in a pointed conical structure, and the angle between the upper and lower inclined surfaces of the front end of the die lip (8) and the horizontal direction is between 20° and 30°.

3. The wet extrusion die head for producing high-strength coated sheet products according to claim 2, characterized in that: The upper and lower inclined surfaces at the front end of the die lip (8) are arc-shaped surfaces, and the curvature of the arc-shaped surface matches the curvature of the surface of the roller behind it.

4. The wet extrusion die head for producing high-strength clad sheet products according to claim 1, characterized in that: A die lip heating rod (20) is provided at the die lip (8).

5. The wet extrusion die head for producing high-strength clad sheet products according to claim 1, characterized in that: The horizontal distance L between the front end of the die lip (8) and the center of the roller is less than 100 mm.

6. The wet extrusion die head for producing high-strength clad sheet products according to claim 1, characterized in that: Fine-tuning screws (21) are evenly arranged on the upper mold body (4) along the width direction, and an adjustment slot (22) is opened on the upper intermediate mold body (5) along the width direction. The fine-tuning screws (21) pass through the adjustment slot (22) and abut against the mold lip (8) to adjust the gap of the mold lip (8).

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