Coating die head capable of controlling gap between die lips through double rows of screws
By combining double-row screws and non-contact testing equipment, the problem of adjusting the die lip gap during die closing was solved, achieving precise control of coating thickness and stable quality.
Patent Information
- Application Number
- CN202520063117.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-01-10
AI Technical Summary
The existing coating die head suffers from slight plastic deformation of the die body due to the tightening torque when the upper and lower dies are closed, which affects the lip gap, making it difficult to achieve fine adjustment and affecting the coating quality.
The coating die head uses a double row of screws to control the die lip gap. The gap between the upper and lower dies is finely adjusted by tightening the front and rear locking screws. Combined with non-contact detection equipment, the die lip deformation is monitored in real time to ensure that the gap reaches the predetermined value.
It enables precise adjustment of the die lip gap, ensuring the stability and consistency of coating thickness.
Smart Images
Figure CN223775230U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of coating die, in particular to a coating die capable of controlling die lip gap through double-row screws. BACKGROUND
[0002] The coating die has a thin coating thickness and a very small die lip gap. When the upper die and the lower die are closed, the die body will be slightly plastically deformed due to the tightening torque, thereby affecting the die lip gap and ultimately affecting the coating quality. The differential adjustment can be adjusted by a large amount, but it cannot be finely adjusted. SUMMARY
[0003] In view of the above problems, the present application aims to provide a coating die capable of controlling die lip gap through double-row screws, which can fine-tune the die lip gap between the upper die and the lower die through the tightening of the double-row screws.
[0004] The technical scheme of the present application is a coating die capable of controlling die lip gap through double-row screws, characterized in that it 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 and the material extrusion channel are connected, a series of locking screws are arranged in the rear region between the upper die and the lower die along the width direction, the locking screws comprise 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 10-50 mm, the distance between adjacent two rear-row locking screws is 40-150 mm, the distance between the front-row locking screws and the rear-row locking screws is 10-50 mm, and the distance between adjacent two front-row locking screws is 30-100 mm.
[0005] Preferably, the feeding channel comprises an upper feeding channel and a lower feeding channel, a buffer flow channel is arranged on the middle bottom surface of the upper die, the upper feeding channel is connected to the middle top surface of the buffer flow channel, and the lower feeding channel is connected to the rear part of the buffer flow channel.
[0006] Preferably, the rear side of the buffer flow channel is V-shaped in transverse cross-section, and the left and right sides of the buffer flow channel from the middle to the width direction are inclined forward.
[0007] Preferably, the transverse cross-section of the buffer flow channel is rectangular.
[0008] The present application can fine-tune the die lip gap between the upper die and the lower die through the tightening of the double-row screws, thereby ensuring the coating thickness. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1 It is the first structure schematic diagram of the present application;
[0010] Figure 2 It is the internal cross-section structure schematic diagram of Figure 1 the present application.
[0011] Figure 3 The second structural schematic diagram of the present application;
[0012] Figure 4 The internal cross-sectional structural schematic diagram of Figure 3 ;
[0013] Wherein: 1 - upper die; 11 - feeding channel; 111 - upper layer feeding channel; 112 - lower layer feeding channel; 12 - buffer flow channel; 2 - lower die; 3 - material extrusion channel; 4 - locking screw; 41 - front row of locking screws; 42 - rear row of locking screws. DETAILED DESCRIPTION
[0014] The present application will be further described in detail below with reference to the accompanying drawings.
[0015] As shown in the drawings, Figures 1 to 4 The present application provides a coating die head for controlling the die lip gap by double-row screws, comprising an upper die 1 and a lower die 2, the upper die 1 is provided with a feeding channel 11, a material extrusion channel 3 is arranged between the upper die 1 and the lower die 2, the feeding channel 11 and the material extrusion channel 3 are connected, a series of locking screws 4 are arranged in the rear region between the upper die 1 and the lower die 2 along the width direction, the locking screws 4 include front row of locking screws 41 and 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 distance between adjacent two rear row of locking screws 42 is 40mm-150mm, the distance between the front row of locking screws 41 and the rear row of locking screws 42 is 10mm-50mm, and the distance between adjacent two front row of locking screws 41 is 30mm-100mm.
[0016] In the above scheme, as shown in Figure 2 and Figure 4 , the feeding channel 11 includes an upper layer feeding channel 111 and a lower layer feeding channel 112, the middle bottom surface of the upper die 1 is provided with a buffer flow channel 12, the upper layer feeding channel 111 is connected to the middle top surface of the buffer flow channel 12, and the lower layer feeding channel 112 is connected to the rear part of the buffer flow channel 12. Compared with a single-layer feeding channel, the arrangement of the double-layer feeding channel can ensure that the flow of the raw material is more uniform.
[0017] Specifically, as shown in Figure 1 , the lateral cross section of the rear side of the buffer flow channel 12 is V-shaped, and the left and right sides of the middle part to the width direction are inclined forward.
[0018] Specifically, as shown in Figure 3 , the lateral cross section of the buffer flow channel 12 is rectangular.
[0019] When tightening, the rear row of locking die screws 42 is first fastened, starting from the center of the rear row of locking die screws 42, and then tightened gradually to both sides, and then the front row of locking die screws 41 is tightened from the center to both sides until all the locking die screws 4 are completely tightened. When tightening the locking die screws, a non-contact detection device such as a laser device or a magnifying glass is arranged at the die lip opening to detect the deformation of the die lip opening, the locking die screws are tightened one by one and the torque of the locking die screws is recorded, and finally the torque of each locking die screw is determined through real-time feedback of the detection data, that is, when each locking die screw is tightened to the recorded torque value by a torque wrench, it can be determined that the opening gap of the current die lip reaches the predetermined value.
[0020] The above is only a preferred embodiment of the present application, and does not limit the application in any form. Any simple modification, equivalent change or modification made to the above embodiment according to the technical principles of the present application still falls within the scope of the technical solutions of the present application.
Claims
1. A coating die for controlling the die lip gap by double row screw, characterized by: The application relates to a die set, which comprises an upper die (1) and a lower die (2), the upper die (1) is provided with a feeding channel (11), a material extrusion channel (3) is arranged between the upper die (1) and the lower die (2), the feeding channel (11) and the material extrusion channel (3) are communicated, a series of locking screws (4) are arranged in the width direction of the rear area between the upper die (1) and the lower die (2), the locking screws (4) comprise front-row locking screws (41) and rear-row locking screws (42), the distance between the rear-row locking screws (42) and the rear end face of the upper die (1) is 10mm-50mm, the distance between two adjacent rear-row locking screws (42) is 40mm-150mm, the distance between the front-row locking screws (41) and the rear-row locking screws (42) is 10mm-50mm, and the distance between two adjacent front-row locking screws (41) is 30mm-100mm.
2. The coating die with the die lip gap controlled by double row screws according to claim 1, characterized in that: The feeding channel (11) comprises an upper-layer feeding channel (111) and a lower-layer feeding channel (112), a buffer flow channel (12) is arranged on the middle bottom surface of the upper die (1), the upper-layer feeding channel (111) is communicated to the middle top surface of the buffer flow channel (12), and the lower-layer feeding channel (112) is communicated to the rear part of the buffer flow channel (12).
3. The coating die with the die lip gap controlled by double row screws according to claim 2, characterized in that: The rear side of the buffer flow channel (12) is V-shaped in the transverse section, and the left and right sides of the buffer flow channel (12) are inclined forward from the middle part to the width direction.
4. The coating die with dual screw control of die lip gap of claim 2, wherein: The transverse section of the buffer flow channel (12) is rectangular.