Slit extrusion die head mechanism

Abstract

The utility model discloses a slit extrusion die head mechanism, and mainly relates to the technical field of extrusion coating. Comprising a die head body, positioning carrier rollers and guide carrier rollers, an extrusion slit is formed in one side of the die head body, the positioning carrier rollers are arranged in parallel relative to the extrusion slit, positioning plates are arranged at the two ends of each positioning carrier roller respectively, adjusting seats are fixed to the sides, away from the die head body, of the positioning plates, and the sides, away from the die head body, of the adjusting seats are mounting surfaces. The die head comprises a die head body, a mounting face is arranged on the die head body, the mounting face is an inclined face inclining in the direction away from the die head body from bottom to top, an inserting groove extending in the length direction of the mounting face is formed in the mounting face, a sliding block sliding in the inserting groove and capable of being locked is arranged in the inserting groove, a moving block is fixed to the outer end of the sliding block, and shaft seats are arranged at the two ends of the guide carrier roller. And the shaft seat is fixed at the outer end of the moving block. The device has the beneficial effects that the tension and the running direction of a base material after coating can be better controlled, so that the coating stability is ensured.

Description

Technical Field

[0001] This utility model relates to the field of extrusion coating technology, specifically a slit extrusion die mechanism. Background Technology

[0002] Slot coating is a coating technology that uses pressure to force a coating liquid through the slots of a mold onto a moving substrate. Its working principle involves the coating liquid being extruded and sprayed out along the slots of a coating mold under pressure and flow rate, uniformly coating the substrate surface. This process offers advantages such as fast coating speed, good film thickness uniformity, wide viscosity range of the coating liquid, fewer coating defects, high coating liquid utilization, and the ability to perform multiple coatings simultaneously.

[0003] The core of a coating system is the coating head, and its design and precision are crucial to coating quality. Besides the high-precision control required for the spacing between the coating head and the support rollers, the support and guiding position of the subsequent rollers on the substrate after coating also significantly impacts the coating effect. It's necessary to consider both the positional coordination with the support rollers to tension the substrate and the coordination with the substrate transport in subsequent processes for guidance. Improper support positioning can lead to substrate vibration or deformation during coating. The position and precision of the guide rollers directly affect the substrate's running direction and tension, thus affecting the uniformity of the coating. Therefore, with changes in processes, substrates, and other factors that may change in production, the support rollers for adjacent coating areas must be carefully adjusted and adapted. However, existing dies and related structures are fixed installations. If tension or positional issues arise, they cannot adapt flexibly and promptly to production needs, thus affecting the coating effect and quality. Utility Model Content

[0004] The purpose of this invention is to provide a slit extrusion die mechanism that can better control the tension and running direction of the substrate after coating, so as to ensure the stability of coating.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A slit extrusion die mechanism includes a die body, a positioning roller, and a guide roller. The die body has an extrusion slit on one side. The positioning roller is arranged side-by-side opposite the extrusion slit. Positioning plates are provided at both ends of the positioning roller. An adjusting seat is fixed to the side of the positioning plate away from the die body. The side of the adjusting seat away from the die body is a mounting surface. The mounting surface is an inclined surface that slopes upwards away from the die body. A slot extending along its length is provided on the mounting surface. A slider that slides and can be locked within the slot is provided. A moving block is fixed to the outer end of the slider. Shaft seats are provided at both ends of the guide roller, and the shaft seats are fixed to the outer ends of the moving blocks.

[0007] The die head body is equipped with linear telescopic mechanisms at both ends. The linear telescopic mechanism includes a stroke frame with a linear stroke. The end of the stroke frame away from the die head body is fixedly connected to the positioning plate. The linear stroke of the stroke frame is horizontal and perpendicular to the extrusion slit.

[0008] The linear telescopic mechanism includes a housing fixed relative to the die body. A mounting plate is provided at one end of the housing near the extrusion slit. The travel frame includes four optical axis guide rails arranged in a matrix. A lead screw is provided in the middle of the travel frame, parallel to the optical axis guide rails. A sliding sleeve that slides with the optical axis guide rails is fixed on the mounting plate. A lead screw nut is fixed in the middle of the mounting plate. The lead screw cooperates with the sliding sleeve. A lead screw motor for driving the lead screw is installed at the outer end of the travel frame.

[0009] A base plate is provided below the mold head body, the base plate is used to support the mold head body, the housing is fixed at both ends of the base plate, and a distance sensor is installed at one or both ends of the base plate, the distance sensor is used to obtain the relative position of the positioning plate.

[0010] The die head body is provided with a receiving groove at the bottom. The opening of the receiving groove is at the top and overlaps with the position of the extrusion slit. A return pipe is provided at one end of the receiving groove, and a return tank is connected to the end of the return pipe.

[0011] Distance sensors, which are infrared or laser sensors, are installed at one or both ends of the substrate. The emitting end of the distance sensor points to the positioning plate. The distance sensor is used to obtain the relative position of the positioning plate, thereby providing feedback on the distance between the positioning roller and the extrusion slit, providing precise data support for coating feedback.

[0012] The bottom width of the slot is greater than the opening width, and the bottom of the slot is trapezoidal.

[0013] The bottom of the movable block is provided with a clearance groove, the slider has a horizontal through-hole, the bottom of the slot has a plurality of positioning grooves along its length, one end of the positioning hole is exposed on the surface of the slider and the other end of the positioning hole is located in the clearance groove, and a positioning bolt is threaded through the positioning hole and engages with the positioning groove.

[0014] A connecting plate is fixed to the top or bottom of the bearing seat. The connecting plate and the bearing seat are L-shaped. Fixing bolts pass through the top and bottom of the connecting plate. The end of the moving block has a bolt hole that mates with the positioning bolt.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This die head mechanism allows for better control of the substrate's stability after coating by adjusting the support position of the rollers, improving coating thickness and quality control. It is suitable for a wider range of substrates with varying performance characteristics and adapts to the requirements of various processes. It precisely controls the substrate's tension and direction of travel to ensure coating stability. Simultaneously, the simplified adjustment structure and optimized support and guide positions reduce malfunctions and adjustment time during coating, thereby increasing production efficiency. Attached Figure Description

[0017] Figure 1 This is a top view of the present invention.

[0018] Figure 2 This is a schematic diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the present invention (the linear telescopic mechanism is not shown).

[0020] Figure 4 yes Figure 3 Side view.

[0021] Figure 5 yes Figure 3 A bottom-view diagram.

[0022] Figure 6 This is a schematic diagram of the components of this utility model (front view).

[0023] Figure 7 This is a schematic diagram of the components of this utility model (rear view).

[0024] The labels shown in the attached diagram:

[0025] 1. Base plate; 2. Receiving groove; 3. Die head body; 4. Machine box; 5. Travel frame; 6. Optical axis guide rail; 7. Lead screw; 8. Mounting plate; 9. Positioning plate; 10. Positioning roller; 11. Distance sensor; 12. Adjustment seat; 13. Mounting surface; 14. Slot; 15. Slider; 16. Moving block; 17. Clearance groove; 18. Positioning hole; 19. Positioning groove; 20. Guide roller; 21. Shaft seat; 22. Connecting plate; 23. Bolt hole. Detailed Implementation

[0026] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0027] Taking into account the design of key support and tension guide rollers, as well as the need for adjustment and movement, the main body of this mechanism includes the following components:

[0028] A base plate 1 is used to support the die head mechanism and to install and fix the entire mechanism in the corresponding position in the production process. The two ends of the bottom of the base plate 1 are fixedly mounted on the mounting platform in the workshop, the die head body 3 is fixedly fixed in the center of the top of the base plate 1, and the receiving groove 2 is fixedly fixed at the bottom of the base plate 1.

[0029] The die head body 3 is selected as a slit extrusion die head. The die head body 3 has an extrusion slit on one side and a feed pipe is provided in the center of the other side of the die head body 3 to realize the function of quantitative slit coating.

[0030] The receiving trough 2 covers the area below the slit and is used to collect and store the liquid dripping during the commissioning and production phases. A return pipe is located at one end of the receiving trough 2, and a return tank is connected to the end of the return pipe. The return tank is used to collect the collected dripping liquid, reducing waste. The liquid can be reused after processing.

[0031] Linear telescopic mechanisms are installed at both ends of the substrate 1. Each linear telescopic mechanism includes a housing 4 fixed to both ends of the substrate. Inside the housing 4 is a travel frame 5 with linear travel. The travel frame 5 includes four optical axis guide rails 6 arranged in a matrix to provide precise and high-strength support and guidance. A mounting plate 8 is located near the extrusion slit of the housing 4. A sliding sleeve that slidably engages with the optical axis guide rails 6 is fixed on the mounting plate 8. A lead screw nut is fixed in the middle of the mounting plate 8. A lead screw 7, parallel to the optical axis guide rails 6, is located in the middle of the travel frame 5. The lead screw 7 engages with the sliding sleeve to control the position and travel of the travel frame 5. A lead screw motor for driving the lead screw 7 is installed at the outer end of the travel frame 5.

[0032] A positioning plate 9 is fixed to one end of the travel frame 5 exposed outside the housing 4. The positioning plates 9 are symmetrically arranged relative to the two ends of the die head body 3. A positioning roller 10 is installed between the positioning plates 9. The side of the positioning roller 10 closest to the die head body 3 is used to bypass the substrate. In production, the substrate is usually fed from below the positioning roller 10, bypasses the positioning roller 10 from bottom to top on the side closest to the die head body 3, and is then delivered from above the positioning roller 10.

[0033] Distance sensors 11 are installed at one or both ends of the substrate 1. The distance sensors 11 are infrared or laser sensors. The emitting end of the distance sensors 11 points to the positioning plate 9. The distance sensors 11 are used to obtain the relative position of the positioning plate 9, thereby providing feedback on the distance between the positioning roller 10 and the extrusion slit, providing precise data support for coating feedback.

[0034] Based on the above structure, the positioning roller 10 in the middle is supported by the positioning plates 9 on both sides. The adjustable stroke frame 5 makes the distance between the positioning roller 10 and the die head body 3 adjustable. On the one hand, the distance between the two can be precisely adjusted to adapt to the thickness of the substrate being processed and the characteristics of the coating liquid. On the other hand, when stopping work and preparing to feed the substrate, the positioning roller 10 is moved away from the die head body 3, which facilitates the corresponding inspection, maintenance, feeding, debugging and other operations.

[0035] The positioning roller 10 is arranged side by side with the die head body 3 at the same height. The linear travel of the travel frame 5 is horizontal and perpendicular to the length direction of the positioning roller 10, thereby enabling precise adjustment of the distance between the positioning roller 10 and the die head body 3.

[0036] An adjustment seat 12 is fixed on the side of the positioning plate 9 away from the mold head body 3. The adjustment seat 12 is a triangular steel component. The side of the adjustment seat 12 away from the mold head body 3 is a mounting surface 13. The mounting surface 13 is an inclined surface that slopes from bottom to top away from the mold head body 3. The mounting surface 13 is provided with a slot 14 extending in the same direction as its length. The bottom width of the slot 14 is greater than the opening width, which can better limit the position. The bottom of the slot 14 is trapezoidal. A slider 15 corresponding to its cross-section is slidably fitted in the slot 14. A horizontally extending moving block 16 is fixed to one end of the slider 15 exposed outside the slot 14. The bottom of the moving block 16 is provided with a clearance groove 17. A positioning hole 18 is horizontally penetrating the slider 15. The bottom of the slot 14 is provided with multiple positioning grooves 19 along its length. One end of the positioning hole 18 is exposed on the surface of the slider 15 and the other end of the positioning hole 18 is located in the clearance groove 17. A positioning bolt threadedly fits through the positioning hole 18. The positioning bolt is threadedly engaged with the positioning groove 19 to fix the relative position of the moving block 16 on the mounting surface 13.

[0037] Since the mounting surface 13 is inclined, the lower the position of the moving block 16, the closer it is to the positioning roller 10, and the higher the fixed position of the moving block 16, the further it is from the positioning roller 10.

[0038] A guide roller 20 is provided between two movable blocks 16. The two ends of the guide roller 20 are respectively provided with a bearing seat 21 for mounting the roller shaft of the guide roller 20. A connecting plate 22 is fixed on one side of the bearing seat 21. A fixing bolt passes through the connecting plate 22. The end of the movable block 16 is provided with a bolt hole 23 that cooperates with the positioning bolt. The connecting plate 22 and the bearing seat 21 are L-shaped.

[0039] In practical applications, the substrate passes around the positioning roller 10 from bottom to top, and then passes around from below the guide roller 20.

[0040] Based on the above structure, the relative positional relationship between the guide roller 20 and the positioning roller 10 can be adjusted in a variety of ways.

[0041] Firstly, by utilizing the tilting effect of the mounting surface 13, the guide roller 20 is positioned such that the closer it is to the positioning roller 10, the lower it is; conversely, the farther it is from the positioning roller 10, the higher it is. This allows for one-step adjustment of tension and guiding capacity. The advantage of this adjustment method is that after coating, the guide roller 20 provides initial support, facilitating the transport to the next process. It provides both guiding and tensioning functions for the substrate and the positioning roller 10. Typically, material is fed from the bottom and discharged from the top, with the next process transported at a higher position. Therefore, when increased tension is required, the guide roller 20 needs to be closer to the positioning roller 10 to tighten the substrate, and the substrate needs to be pressed down to achieve higher tension. Thus, increasing tension requires simultaneously adjusting the distance and lowering the position. If reducing the tension gap leads to subsequent stabilization of the guide, it is necessary to adjust the distance and height. By using an inclined mounting surface 13, adjustments in both dimensions can be completed in one step, which is more convenient and facilitates easy adjustment operations through a preset inclined surface.

[0042] Secondly, since the connecting plate 22 and the bearing seat 21 are L-shaped, there are two installation methods in actual use. The first method is to position the guide roller 20 above the connecting plate 22. In this state, at the same installation height of the moving block 16, the downward pressure of the guide roller 20 is small and the upward guiding effect is good. The second method is to position the guide roller 20 below the connecting plate 22. In this state, at the same installation height of the moving block 16, the guide roller 20 is pressed down more, thus increasing the tension. By adjusting the installation method, it can be adapted to substrates with different needs, further increasing the flexibility of the relative position of the guide roller 20.

[0043] This die head mechanism allows for better control of the substrate's stability after coating by adjusting the support position of the rollers, improving coating thickness and quality control. It is suitable for a wider range of substrates with varying performance characteristics and can adapt to the requirements of various processes. It also allows for precise control of the substrate's tension and running direction to ensure coating stability.

[0044] Meanwhile, by simplifying the adjustment structure and rationally positioning the support and guide, the failures and adjustment time during the coating process are reduced, thereby improving production efficiency.

Claims

1. A slit extrusion die mechanism, characterized in that, The device includes a die head body, positioning rollers, and guide rollers. One side of the die head body has an extrusion slit. The positioning rollers are arranged side-by-side opposite the extrusion slit. Positioning plates are provided at both ends of the positioning rollers. An adjusting seat is fixed to the side of the positioning plate away from the die head body. The side of the adjusting seat away from the die head body is a mounting surface. The mounting surface is an inclined surface that slopes upwards away from the die head body. A slot extending along its length is provided on the mounting surface. A slider that slides and can be locked within the slot is provided. A moving block is fixed to the outer end of the slider. Shaft seats are provided at both ends of the guide rollers, and the shaft seats are fixed to the outer ends of the moving blocks.

2. The slit extrusion die mechanism according to claim 1, characterized in that, The die head body is equipped with linear telescopic mechanisms at both ends. The linear telescopic mechanism includes a stroke frame with a linear stroke. The end of the stroke frame away from the die head body is fixedly connected to the positioning plate. The linear stroke of the stroke frame is horizontal and perpendicular to the extrusion slit.

3. The slit extrusion die mechanism according to claim 2, characterized in that, The linear telescopic mechanism includes a housing fixed relative to the die body. A mounting plate is provided at one end of the housing near the extrusion slit. The travel frame includes four optical axis guide rails arranged in a matrix. A lead screw is provided in the middle of the travel frame, parallel to the optical axis guide rails. A sliding sleeve that slides with the optical axis guide rails is fixed on the mounting plate. A lead screw nut is fixed in the middle of the mounting plate. The lead screw cooperates with the sliding sleeve. A lead screw motor for driving the lead screw is installed at the outer end of the travel frame.

4. The slit extrusion die mechanism according to claim 3, characterized in that, A base plate is provided below the mold head body, the base plate is used to support the mold head body, the housing is fixed at both ends of the base plate, and a distance sensor is installed at one or both ends of the base plate, the distance sensor is used to obtain the relative position of the positioning plate.

5. The slit extrusion die mechanism according to claim 1, characterized in that, The die head body is provided with a receiving groove at the bottom. The opening of the receiving groove is at the top and overlaps with the position of the extrusion slit. A return pipe is provided at one end of the receiving groove, and a return tank is connected to the end of the return pipe.

6. The slit extrusion die mechanism according to claim 4, characterized in that, Distance sensors, which are infrared or laser sensors, are installed at one or both ends of the substrate. The emitting end of the distance sensor points to the positioning plate. The distance sensor is used to obtain the relative position of the positioning plate, thereby providing feedback on the distance between the positioning roller and the extrusion slit, providing precise data support for coating feedback.

7. The slit extrusion die mechanism according to claim 1, characterized in that, The bottom width of the slot is greater than the opening width, and the bottom of the slot is trapezoidal.

8. The slit extrusion die mechanism according to claim 1, characterized in that, The bottom of the movable block is provided with a clearance groove, the slider has a horizontal through-hole, the bottom of the slot has a plurality of positioning grooves along its length, one end of the positioning hole is exposed on the surface of the slider and the other end of the positioning hole is located in the clearance groove, and a positioning bolt is threaded through the positioning hole and engages with the positioning groove.

9. The slit extrusion die mechanism according to claim 1, characterized in that, A connecting plate is fixed to the top or bottom of the bearing seat. The connecting plate and the bearing seat are L-shaped. Fixing bolts pass through the top and bottom of the connecting plate. The end of the moving block has a bolt hole that mates with the positioning bolt.

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