An in-mold composite die head with adjustable flow channel parameters

Abstract

This invention provides an in-mold composite die head with adjustable flow channel parameters, including an upper die, an upper middle die, a gasket, a lower middle die, and a lower die. A feeding channel A is formed between the upper and upper middle dies, and a feeding channel B is formed between the lower die and the lower middle die. The upper and lower dies form a die lip discharge channel. The upper and lower middle dies are provided with strip-shaped through holes. The upper and lower dies are connected by a mold-closing screw, which passes through the strip-shaped through holes in the upper and lower middle dies. A fixing block is connected to the rear side of the upper and lower dies. Nuts are fixedly connected to the inner side of the fixing blocks at positions on the rear sides of both the upper and lower dies. The nuts protrude from the surface of the fixing blocks and are internally threaded with fine-tuning screws. The fine-tuning screws have axially threaded inner holes, and lead screws are threaded into these inner holes. The front end of the upper lead screw is threaded into the upper die, and the front end of the lower lead screw is threaded into the lower die. This invention can adjust the in-mold flow channel gap and the die lip opening gap.

Description

Technical Field

[0001] This invention relates to the field of extrusion die technology, and in particular to an in-mold composite die with adjustable flow channel parameters. Background Technology

[0002] Extrusion dies have specific requirements for die lip opening and flow channel. The size of the die lip opening and the flow channel clearance will affect the customer's product requirements. Customers will customize the corresponding die head according to their product requirements. This means that it is not possible to meet the customer's need to use the same set of die heads to produce different product specifications. Summary of the Invention

[0003] To address the aforementioned issues, this invention aims to provide an in-mold composite die head with adjustable flow channel parameters. Its novel structure allows for adjustment of the in-mold flow channel gap and die lip opening gap, meeting diverse customer needs.

[0004] The technical solution of this invention is an in-mold composite die head with adjustable flow channel parameters, including an upper die, an upper middle die, a gasket, a lower middle die, and a lower die. The upper die has an A-type inlet on its rear side, and the lower die has a B-type inlet on its rear side. An A-type inlet channel is formed between the upper die and the upper middle die, and a B-type inlet channel is formed between the lower die and the lower middle die. A die lip outlet channel is formed at the front end of the upper and lower dies. The upper middle die and the lower middle die are provided with strip-shaped through holes. The upper die and the lower die are connected by a series of clamping screws, which pass through the strip-shaped through holes in the upper middle die and the lower middle die. A fixing block is connected to the rear side of the upper die and the lower die. Nuts are fixedly connected to the inner side of the fixed block at positions behind the upper and lower molds. The nuts protrude from the surface of the fixed block and are internally threaded to fine-tuning screws. The fine-tuning screws have axially threaded inner holes, and lead screws are threadedly connected to the inner holes. The front end of the upper lead screw is threaded to the upper mold, and the front end of the lower lead screw is threaded to the lower mold. The external thread pitch of the fine-tuning screw is greater than the internal thread pitch. Rotating the upper fine-tuning screw drives the lead screw forward or backward to adjust the gap of the A feeding channel of the upper and middle molds. Rotating the lower fine-tuning screw drives the lead screw forward or backward to adjust the gap of the B feeding channel of the lower and middle molds.

[0005] Preferably, the top surface of the upper middle mold is provided with a first limiting groove, and the upper mold is correspondingly provided with a first limiting block. When the upper middle mold moves back and forth, the first limiting block contacts the front and rear sides of the first limiting groove to limit its position. The bottom surface of the lower middle mold is provided with a second limiting groove, and the lower mold is correspondingly provided with a second limiting block. When the lower middle mold moves back and forth, the second limiting block contacts the front and rear sides of the second limiting groove to limit its position.

[0006] Preferably, the front end of the upper mold is connected to the upper mold lip at the mold lip discharge channel, and the front end of the lower mold is connected to the lower mold lip at the mold lip discharge channel. The height of the mold lip discharge channel can be adjusted by changing the upper and lower mold lips of different heights.

[0007] Preferably, the rear end of the lead screw is provided with a scale for easy reading of the specific forward and backward values.

[0008] Preferably, the external thread pitch of the fine-tuning screw is 1.25mm, the internal thread pitch of the fine-tuning screw is 1mm, and the lead screw advances 0.25mm or retracts 0.25mm when the fine-tuning screw rotates one revolution.

[0009] This invention can adjust the gap between the A and B feed channels inside the mold. The mold lip opening gap can be adjusted by replacing the shims or the upper and lower mold lips, so as to meet the needs of customers to produce products of different specifications with the same set of mold heads. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the present invention;

[0011] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0012] Figure 3 This is an exploded structural diagram of the present invention;

[0013] Figure 4 This is a cross-sectional view of the internal structure of the present invention;

[0014] Wherein: 1—Upper mold; 1a—First limiting block; 2—Upper middle mold; 2a—First limiting groove; 3—Shim; 4—Lower middle mold; 4a—Second limiting groove; 5—Lower mold; 5a—Second limiting block; 6—A feeding channel; 7—B feeding channel; 8—Mold lip discharge channel; 9—Strip-shaped through hole; 10—Mold closing screw; 11—Fixing block; 12—Nut; 13—Fine adjustment screw; 14—Lead screw; 14a—Scale ruler; 15—Upper mold lip; 16—Lower mold lip; m—A feeding port; n—B feeding port. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] like Figures 1 to 4As shown, this invention provides an in-mold composite die head with adjustable flow channel parameters, including an upper die 1, an upper middle die 2, a gasket 3, a lower middle die 4, and a lower die 5. The upper die 1 has an A-type inlet m on its rear side, and the lower die 5 has a B-type inlet n on its rear side. An A-type inlet channel 6 is formed between the upper die 1 and the upper middle die 2, and a B-type inlet channel 7 is formed between the lower die 5 and the lower middle die 4. A die lip outlet channel 8 is formed at the front end of the upper die 1 and the lower die 5. The upper middle die 2 and the lower middle die 4 are provided with strip-shaped through holes 9. The upper die 1 and the lower die 5 are connected by a series of clamping screws 10, which pass through the strip-shaped through holes 9 of the upper middle die 2 and the lower middle die 4. A fixing block 11 is connected to the rear side of the upper die 1 and the lower die 5. Nuts 12 are fixedly connected to the inner side of the fixed block 11 at the rear side of the upper mold 1 and the rear side of the lower mold 5. The nuts 12 protrude from the surface of the fixed block 11 and are internally threaded to a fine-adjusting screw 13. The fine-adjusting screw 13 has an axially threaded inner hole, and a lead screw 14 is threadedly connected to the inner hole. The front end of the upper lead screw 14 is threaded to the upper mold 1, and the front end of the lower lead screw 14 is threaded to the lower mold 5. The external thread pitch of the fine-adjusting screw 13 is greater than the internal thread pitch. Rotating the upper fine-adjusting screw 13 drives the lead screw 14 to push forward or pull backward the upper middle mold 2 to adjust the gap of the A feed channel 6. Rotating the lower fine-adjusting screw 13 drives the lead screw 14 to push forward or pull backward the lower middle mold 4 to adjust the gap of the B feed channel 7.

[0017] In the above scheme, the top surface of the upper middle mold 2 is provided with a first limiting groove 2a, and the upper mold 1 is correspondingly provided with a first limiting block 1a. When the upper middle mold 2 moves back and forth, the first limiting block 1a contacts the front and rear sides of the first limiting groove 2a to limit its position. The bottom surface of the lower middle mold 4 is provided with a second limiting groove 4a, and the lower mold 5 is correspondingly provided with a second limiting block 5a. When the lower middle mold 4 moves back and forth, the second limiting block 5a contacts the front and rear sides of the second limiting groove 4a to limit its position.

[0018] In addition, the front end of the upper mold 1 is connected to the upper mold lip 15 at the mold lip discharge channel 8, and the front end of the lower mold 5 is connected to the lower mold lip 16 at the mold lip discharge channel 8. The height of the mold lip discharge channel 8 can be adjusted by replacing the upper mold lip 15 and the lower mold lip 16 with different heights.

[0019] In addition, the rear end of the lead screw 14 is provided with a scale 14a for easy reading of the specific forward and backward values.

[0020] Specifically, the external thread pitch of the fine-tuning screw 13 is 1.25mm, and the internal thread pitch of the fine-tuning screw 13 is 1mm. When the fine-tuning screw 13 rotates one revolution, the lead screw 14 advances or retracts by 0.25mm. Specifically, rotating the fine-tuning screw 13 one revolution causes it to advance or retract 1.25mm relative to the nut 12, while simultaneously the lead screw 14 moves 1mm in the opposite direction relative to the fine-tuning screw 13. Therefore, the lead screw 14 actually advances or retracts 0.25mm relative to the nut 12.

[0021] In this invention, when adjusting the die lip opening gap, the shims 3 of different thicknesses can be replaced according to different requirements. Alternatively, the gap can be adjusted by replacing the upper die lip 15 and lower die lip 16 with different specifications. When adjusting the flow channel gap within the die, the gap of feed channel A 6 is adjusted by rotating the upper fine-tuning screw 13, which drives the lead screw 14 forward or backward to adjust the upper middle die 2. The gap of feed channel B 7 is adjusted by rotating the lower fine-tuning screw 13, which drives the lead screw 14 forward or backward to adjust the lower middle die 4.

[0022] 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. An in-mold composite die capable of adjusting flow channel parameters, comprising an upper die (1), an upper middle die (2), a gasket (3), a lower middle die (4) and a lower die (5), the rear side of the upper die (1) is provided with an A feeding port (m), the rear side of the lower die (5) is provided with a B feeding port (n), an A feeding channel (6) is formed between the upper die (1) and the upper middle die (2), a B feeding channel (7) is formed between the lower die (5) and the lower middle die (4), and a die lip discharging channel (8) is formed at the front end area of the upper die (1) and the lower die (5), characterized in that: The upper middle die (2) and the lower middle die (4) are provided with strip-shaped through holes (9), the upper die (1) and the lower die (5) are connected through a series of die closing screws (10), the die closing screws (10) pass through the strip-shaped through holes (9) of the upper middle die (2) and the lower middle die (4), the rear sides of the upper die (1) and the lower die (5) are connected with fixing blocks (11), the inner sides of the fixing blocks (11) are fixedly connected with nuts (12) at positions on the rear sides of the upper die (1) and the lower die (5), the nuts (12) pass through the surfaces of the fixing blocks (11) and are screw-connected with micro-adjusting screws (13) in the screw holes, the axial screw holes of the micro-adjusting screws (13) are screw-connected with lead screws (14), the front ends of the upper lead screws (14) are screw-connected in the upper middle die (2), the front ends of the lower lead screws (14) are screw-connected in the lower middle die (4), the outer thread pitch of the micro-adjusting screws (13) is larger than the inner thread pitch, rotating the upper micro-adjusting screws (13) drives the lead screws (14) to push or pull the upper middle die (2) forward or backward to adjust the A feeding channel (6) gap, rotating the lower micro-adjusting screws (13) drives the lead screws (14) to push or pull the lower middle die (4) forward or backward to adjust the B feeding channel (7) gap.

2. The adjustable channel parameter in-mold composite die of claim 1, wherein: The top surface of the upper middle die (2) is provided with a first limiting groove (2a), the upper die (1) is correspondingly provided with a first limiting block (1a), when the upper middle die (2) moves forward and backward, the forward and backward positions are limited by the first limiting block (1a) contacting the front and rear sides of the first limiting groove (2a); the bottom surface of the lower middle die (4) is provided with a second limiting groove (4a), the lower die (5) is correspondingly provided with a second limiting block (5a), when the lower middle die (4) moves forward and backward, the forward and backward positions are limited by the second limiting block (5a) contacting the front and rear sides of the second limiting groove (4a).

3. The adjustable channel parameter in-mold composite die of claim 1, wherein: The front end of the upper die (1) is connected with an upper die lip (15) at the die lip discharge channel (8), the front end of the lower die (5) is connected with a lower die lip (16) at the die lip discharge channel (8), the height of the die lip discharge channel (8) is adjusted by replacing the upper die lip (15) and the lower die lip (16) with different heights.

4. The adjustable channel parameter in-mold composite die of claim 1, wherein: The rear end of the lead screw (14) is provided with a scale (14a) for reading the specific values of forward and backward movement.

5. The adjustable channel parameter in-mold composite die of claim 1, wherein: The outer thread pitch of the micro-adjusting screw (13) is 1.25 mm, the inner thread pitch of the micro-adjusting screw (13) is 1 mm, when the micro-adjusting screw (13) rotates one circle, the lead screw (14) advances 0.25 mm or retreats 0.25 mm.

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