Coating die head capable of controlling gap between die lips through double rows of screws

Abstract

According to the technical scheme, the coating die head capable of controlling the die lip gap through the double rows of screws is characterized in that the coating die head comprises an upper die and a lower die, the upper die is provided with a feeding channel, a material extrusion channel is arranged between the upper die and the lower die, the feeding channel is communicated with the material extrusion channel, and the feeding channel is communicated with the material extrusion channel. A series of mold locking screws are arranged in the rear area between the upper mold and the lower mold in the breadth direction, the mold locking screws comprise the front-row mold locking screws and the rear-row mold locking screws, the distance between the rear-row mold locking screws and the rear end face of the upper mold ranges from 10 mm to 50 mm, the distance between every two adjacent rear-row mold locking screws ranges from 40 mm to 150 mm, and the distance between every two adjacent rear-row mold locking screws ranges from 10 mm to 50 mm. The distance between the front-row mold locking screws and the rear-row mold locking screws ranges from 10 mm to 50 mm, and the distance between every two adjacent front-row mold locking screws ranges from 30 mm to 100 mm. The die lip gap between the upper die and the lower die can be finely adjusted by tightening the double-row bolts, so that the coating thickness is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of coating die heads, in particular to a coating die head with a die lip gap controlled by double-row screws. Background Art

[0002] The coating thickness of the coating die head is thin, and the lip gap is very small. When the upper and lower molds are closed, the tightening torque causes the mold body to undergo a slight plastic deformation, which affects the lip gap and ultimately affects the coating quality. Differential adjustment can be adjusted to a large extent, but it cannot be adjusted finely. Summary of the invention

[0003] In view of the above problems, the present invention aims to provide a coating die head that controls the die lip gap by double-row screws, and the die lip gap between the upper and lower dies can be fine-tuned by tightening the double-row bolts.

[0004] The technical solution of the present invention is a coating die head that controls the die lip gap by double-row screws, characterized in that: it includes an upper die and a lower die, the upper die is provided with a feed channel, a material extrusion channel is provided between the upper die and the lower die, the feed channel and the material extrusion channel are connected, and a series of locking screws are provided in the rear area between the upper die and the lower die along the width direction, the locking screws include front-row locking screws and rear-row locking screws, the distance between the rear-row locking screws and the rear end face of the upper die is 10mm-50mm, the spacing between two adjacent rear-row locking screws is 40mm-150mm, the spacing between the front-row locking screws and the rear-row locking screws is 10mm-50mm, and the spacing between two adjacent front-row locking screws is 30mm-100mm.

[0005] Preferably, the feed channel includes an upper feed channel and a lower feed channel, a buffer channel is provided on the bottom surface of the middle part of the upper mold, the upper feed channel is connected to the top surface of the middle part of the buffer channel, and the lower feed channel is connected to the rear part of the buffer channel.

[0006] Preferably, the rear transverse cross-section of the buffer flow channel is V-shaped, and is inclined forward from the middle to the left and right sides in the width direction.

[0007] Preferably, the transverse cross-section of the buffer flow channel is rectangular.

[0008] The present invention can finely adjust the die lip gap between the upper and lower dies by tightening the double-row bolts, thereby ensuring the coating thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the first structure of the present invention; Figure 2 for Figure 1 Schematic diagram of the internal cross-sectional structure; Figure 3 It is a second structural schematic diagram of the present invention; Figure 4 for Figure 3 Schematic diagram of the internal cross-sectional structure; Among them: 1—upper mold; 11—feed channel; 111—upper layer feed channel; 112—lower layer feed channel; 12—buffer flow channel; 2—lower mold; 3—material extrusion channel; 4—locking screw; 41—front row locking screw; 42—rear row locking screw. DETAILED DESCRIPTION

[0010] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0011] like Figures 1 to 4 As shown, the present invention provides a coating die head that controls the die lip gap by double-row screws, including an upper die 1 and a lower die 2, the upper die 1 is provided with a feed channel 11, a material extrusion channel 3 is provided between the upper die 1 and the lower die 2, the feed channel 11 and the material extrusion channel 3 are connected, and a series of locking screws 4 are provided in the rear area between the upper die 1 and the lower die 2 along the width direction, the locking screws 4 include a front row of locking screws 41 and a rear row of locking screws 42, the distance between the rear row of locking screws 42 and the rear end face of the upper die 1 is 10mm-50mm, the spacing between two adjacent rear row of locking screws 42 is 40mm-150mm, the spacing between the front row of locking screws 41 and the rear row of locking screws 42 is 10mm-50mm, and the spacing between two adjacent front row of locking screws 41 is 30mm-100mm.

[0012] In the above scheme, if Figure 2 and Figure 4 As shown, the feed channel 11 includes an upper layer feed channel 111 and a lower layer feed channel 112. A buffer channel 12 is provided on the bottom surface of the middle part of the upper mold 1. The upper layer feed channel 111 is connected to the top surface of the middle part of the buffer channel 12, and the lower layer feed channel 112 is connected to the rear part of the buffer channel 12. The setting of the double-layer feed channel can ensure a more uniform flow of the raw material compared to the single-layer feed channel.

[0013] Specifically, Figure 1 As shown, the rear transverse cross section of the buffer flow channel 12 is V-shaped, and is inclined forward from the middle to the left and right sides in the width direction.

[0014] Specifically, Figure 3 As shown, the transverse cross section of the buffer flow channel 12 is rectangular.

[0015] When tightening, first tighten the rear mold locking screws 42, start tightening from the center position of the rear mold locking screws 42, gradually tighten to both sides, and then tighten from the center position of the front mold locking screws 41 to both sides until all the mold locking screws 4 are completely tightened. When tightening the mold locking screws, set a non-contact detection device at the die lip, such as a laser device or a magnifying glass, to detect the deformation of the die lip, tighten the mold locking screws one by one and record the torque of the mold locking screws, and finally determine the torque of each mold locking screw through the real-time feedback of the detection data, that is, when each mold locking screw is tightened to the recorded torque value by a torque wrench, it can be determined that the current die lip opening gap reaches the predetermined value.

[0016] 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 coating die head with a die lip gap controlled by a double row of screws, characterized in that: The invention comprises an upper die (1) and a lower die (2), wherein the upper die (1) is provided with a feed channel (11), a material extrusion channel (3) is provided between the upper die (1) and the lower die (2), the feed channel (11) and the material extrusion channel (3) are communicated, a series of mold locking screws (4) are provided in the rear region between the upper die (1) and the lower die (2) along the width direction, the mold locking screws (4) comprise a front row of mold locking screws (41) and a rear row of mold locking screws (42), the distance between the rear row of mold locking screws (42) and the rear end surface of the upper die (1) is 10 mm-50 mm, the spacing between two adjacent rear row of mold locking screws (42) is 40 mm-150 mm, the spacing between the front row of mold locking screws (41) and the rear row of mold locking screws (42) is 10 mm-50 mm, and the spacing between two adjacent front row of mold locking screws (41) is 30 mm-100 mm.

2. A coating die head for controlling the die lip gap by double-row screws according to claim 1, characterized in that: The feed channel (11) comprises an upper feed channel (111) and a lower feed channel (112); a buffer channel (12) is provided on the middle bottom surface of the upper mold (1); the upper feed channel (111) is connected to the middle top surface of the buffer channel (12); and the lower feed channel (112) is connected to the rear of the buffer channel (12).

3. A coating die head for controlling the die lip gap by double-row screws according to claim 2, characterized in that: The rear transverse cross-section of the buffer flow channel (12) is V-shaped, and is inclined forward from the middle to the left and right sides in the width direction.

4. A coating die head with a double-row screw for controlling the die lip gap according to claim 2, characterized in that: The transverse cross section of the buffer flow channel (12) is rectangular.

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