PE film coating thickness uniformity adjusting die

Abstract

The utility model provides a kind of PE shower film thickness uniformity adjusting die head, belong to shower die head field, including upper die and lower die, both ends of upper die and lower die are provided with a group of mounting plate, one of mounting plate is provided with adjusting head, the outer side wall of upper die is fixedly connected with flange, the both sides of upper die and lower die are provided with baffle, baffle is arranged between upper die and mounting plate, mounting plate and baffle are fixed on upper die and lower die by bolt, adjusting rod is rotatably connected in upper die, the end of adjusting rod is fixedly connected with adjusting head and penetrates one of mounting plate, the below of flange is fixedly connected with multiple equidistantly arranged connecting sleeve, adjusting assembly is provided on upper die, the utility model, adjusting rod is rotated by adjusting head drive, drive sleeve ring synchronous rotation by worm gear drive, and then drive multiple sliding sleeve integral movement, realize the synchronous, large-scale overall adjustment of the gap between die lip, satisfy the quick switching demand of different shower film thickness.

Description

Technical Field

[0001] This utility model relates to the field of coating molds, and more specifically, to a PE coating thickness uniformity adjustment mold. Background Technology

[0002] The coating die head is the core component of a coating machine. It is mainly used to uniformly and stably coat molten plastic resin onto the surface of substrates such as paper, fabric, and film to form a continuous and dense plastic coating, thereby giving the substrate waterproof, moisture-proof, barrier, and heat-sealing properties. It typically consists of a die body, a flow distribution chamber, an adjustment mechanism, and a die lip. Its working principle is that high-temperature molten plastic enters the flow distribution chamber of the die head through the extruder. After homogenization and pressure adjustment in the internal flow channels, it is extruded from a precisely adjustable slit-like lip, flowing evenly in sheet form onto the cooling roller or substrate that is in close contact with the die head.

[0003] Many existing traditional coating die heads are designed with a fixed lip structure or only have local fine-tuning function, making it difficult to achieve synchronous and overall adjustment of the entire die lip opening size, resulting in poor adaptability to meet different product requirements. When it is necessary to produce coating products of different thicknesses, it is often necessary to replace the entire die head or change the coating thickness through complex mechanical adjustments, which increases production costs.

[0004] How to design a PE coating thickness uniformity adjustment die to improve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] To overcome the above deficiencies, this utility model provides a PE coating thickness uniformity adjustment die head, which aims to improve the problems mentioned in the background.

[0006] This utility model is implemented as follows: This utility model provides a PE coating thickness uniformity adjustment die head, including an upper die and a lower die. Each end of the upper die and lower die is provided with a set of mounting plates, one of which has an adjustment head. A protruding edge is fixedly connected to the outer wall of the upper die. Baffles are provided on both sides of the upper die and lower die, positioned between the upper die and the mounting plates. The mounting plates and baffles are fixed to the upper die and lower die by bolts. An adjustment rod is rotatably connected inside the upper die, with its end passing through one of the mounting plates and fixedly connected to the adjustment head. Multiple equidistantly arranged connecting sleeves are fixedly connected below the protruding edge. A die lip is provided on one side of the upper die and lower die. An adjustment component is provided on the upper die.

[0007] Preferably, the adjusting component includes a sliding sleeve slidably connected within the connecting sleeve, a plurality of equidistant adjusting nuts are provided above the convex edge, a plurality of springs are provided between the adjusting nuts and the convex edge, a bent portion is provided on the upper mold, and an adjusting baffle is fixedly connected to the upper mold at the gap between the mold lips, the length of the adjusting baffle matching the length of the mold lip.

[0008] Preferably, the convex edge is rotatably provided with a collar, the circumferential sidewall of the collar is circumferentially distributed with gear teeth, the outer circumferential sidewall of the adjusting rod is provided with helical teeth, and the collar is engaged with the helical teeth on the adjusting rod through the gear teeth.

[0009] Preferably, a sliding platform is fixedly connected to the outer wall of the sliding sleeve, and the sliding sleeve is slidably connected to the inner wall of the connecting sleeve through the sliding platform.

[0010] Preferably, the bottom end of the adjusting nut is fixedly connected to an adjusting stud, the spring is sleeved on the adjusting stud, the adjusting stud passes through the collar, the sliding sleeve and the die lip, and the bottom end of the adjusting stud abuts against the side wall of the adjusting baffle.

[0011] Preferably, the top sidewall of the adjusting stud is provided with a first external thread, and the top inner sidewall of the collar is provided with a first internal thread, and the adjusting stud and the collar are connected by a threaded engagement.

[0012] Preferably, the bottom end of the sliding sleeve is arc-shaped, and the arc-shaped bottom end of the sliding sleeve abuts against the bent portion. The inner sidewall of the sliding sleeve is provided with a second internal thread, and the bottom outer sidewall of the collar is provided with a second external thread. The sliding sleeve and the collar are connected by a threaded engagement.

[0013] The beneficial effects of this utility model are: by driving the adjusting rod to rotate through the adjusting head, the collar is driven to rotate synchronously through the worm gear-worm transmission, thereby driving multiple sliding sleeves to move as a whole, realizing synchronous and large-range overall adjustment of the die lip gap, meeting the needs of rapid switching of different coating thicknesses; at the same time, based on the overall adjustment, each adjusting nut can rotate independently, driving the corresponding adjusting stud to feed axially, and finely correcting the local die lip gap. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1This is a schematic diagram of a three-dimensional structure of a PE coating thickness uniformity adjustment mold provided by an embodiment of the present invention; Figure 2 This is a schematic diagram of the position of the baffle plate of the PE coating thickness uniformity adjustment mold provided by an embodiment of the present invention; Figure 3 This is a schematic diagram of a planar structure of a PE coating thickness uniformity adjustment die head provided by an embodiment of this utility model; Figure 4 This is a schematic diagram of the flow channel position of a PE coating thickness uniformity adjustment die head provided by an embodiment of this utility model; Figure 5 yes Figure 4 Enlarged view of point A; Figure 6 This is a cross-sectional structural diagram of a PE coating thickness uniformity adjustment mold head adjustment component provided by an embodiment of this utility model.

[0016] In the diagram: 1. Upper mold; 2. Lower mold; 3. Mounting plate; 4. Adjusting head; 5. Protruding edge; 6. Baffle; 7. Adjusting rod; 8. Connecting sleeve; 9. Mold lip; 11. Adjusting nut; 12. Spring; 13. Sliding sleeve; 21. Bending part; 22. Adjusting baffle; 23. Collar; 24. Gear tooth; 25. Slide table; 26. Adjusting stud. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Example, refer to Figures 1-6A PE coating thickness uniformity adjustment die head includes an upper die 1 and a lower die 2. Each end of the upper die 1 and lower die 2 is provided with a set of mounting plates 3. One of the mounting plates 3 is equipped with an adjustment head 4. A protruding edge 5 is fixedly connected to the outer wall of the upper die 1. Baffles 6 are provided on both sides of the upper die 1 and lower die 2, positioned between the upper die 1 and the mounting plates 3. Both the mounting plates 3 and the baffles 6 are fixed to the upper die 1 and lower die 2 by bolts. An adjustment rod 7 is rotatably connected inside the upper die 1. The end of the adjustment rod 7 passes through one of the mounting plates 3 and is fixedly connected to the adjustment head 4. Multiple equidistantly arranged connecting sleeves 8 are fixedly connected below the protruding edge 5. A die lip 9 is provided on one side of the upper die 1 and lower die 2. An adjustment assembly is provided on the upper die 1. The baffles 6 are used to seal both ends of the die lip 9, allowing molten resin material to flow only from inside the die lip 9. The mounting plates 3 confine the adjustment rod 7 within the upper die 1, fixing its axial position.

[0019] The adjustment assembly includes a sliding sleeve 13 slidably connected within the connecting sleeve 8, a plurality of equidistant adjusting nuts 11 arranged above the protruding edge 5, a plurality of springs 12 arranged between the adjusting nuts 11 and the protruding edge 5, a bent part 21 provided on the upper mold 1, and an adjusting baffle 22 fixedly connected to the upper mold 1 at the gap between the mold lips 9, the length of the adjusting baffle 22 matching the length of the mold lips 9, and the springs 12 having a preset compression force, located between the protruding edge 5 and the adjusting nuts 11 to prevent the adjusting nuts 11 from rotating in the non-adjusting state.

[0020] A collar 23 is rotatably mounted on the convex edge 5. Gear teeth 24 are circumferentially distributed on the circumferential sidewall of the collar 23. Helical teeth are provided on the outer circumferential sidewall of the adjusting rod 7. The collar 23 meshes with the helical teeth on the adjusting rod 7 via the gear teeth 24. In the longitudinal section passing through the axis of the adjusting rod 7, the two sides of the helical teeth have straight profiles, and the included angle forms a constant pressure angle, constituting an Archimedean worm. The tooth profile of the gear teeth 24 is a conjugate surface formed by the envelopment during meshing with the worm. The gear teeth 24 mesh with the helical teeth of the Archimedean worm on the adjusting rod 7, forming a worm gear-worm transmission pair.

[0021] A slide table 25 is fixedly connected to the outer wall of the sliding sleeve 13. The sliding sleeve 13 is slidably connected to the inner wall of the connecting sleeve 8 through the slide table 25. An adjusting stud 26 is fixedly connected to the bottom end of the adjusting nut 11. A spring 12 is sleeved on the adjusting stud 26. The adjusting stud 26 passes through the collar 23, the sliding sleeve 13 and the die lip 9. The bottom end of the adjusting stud 26 abuts against the side wall of the adjusting baffle 22. The top side wall of the adjusting stud 26 is provided with a first external thread. The top inner side wall of the collar 23 is provided with a first internal thread. The adjusting stud 26 and the collar 23 are connected by a threaded engagement. The bottom end of the sliding sleeve 13 is arc-shaped. The arc-shaped bottom end of the sliding sleeve 13 abuts against the bent part 21. The inner side wall of the sliding sleeve 13 is provided with a second internal thread. The bottom outer side wall of the collar 23 is provided with a second external thread. The sliding sleeve 13 and the collar 23 are connected by a threaded engagement.

[0022] Molten plastic resin is injected into the flow channel between the upper mold 1 and the lower mold 2. The plastic resin is squeezed out from the gap at the mold lip 9, forming a thin film for coating. When the melt flows in the mold cavity, the flow velocity in each area cannot be kept completely uniform. The faster flow velocity will cause local accumulation, resulting in a thicker local coating. At this time, by rotating the adjusting nut 11 at the corresponding position of the thicker film, the adjusting stud 26 is driven to rotate in the collar 23 through the thread engagement (the collar 23 is engaged with the adjusting rod 7 and does not rotate on its own). The end of the adjusting stud 26 presses against the adjusting baffle 22, reducing the gap at the mold lip 9, thereby reducing the thickness of the thicker film and achieving uniform film thickness adjustment.

[0023] If it is necessary to adjust the thickness of the entire coating, the adjusting head 4 is rotated to make the adjusting rod 7 rotate inside the upper mold 1. The worm gear-worm transmission pair drives the collar 23 to rotate. The collar 23 drives the sliding sleeve 13 to slide inside the connecting sleeve 8 through the threaded engagement. The ends of multiple sliding sleeves 13 simultaneously squeeze the bent part 21, causing the bent part 21 to bend and deform. This is used to quickly adjust the gap at the mold lip 9 and facilitate the switching of different coating thicknesses.

[0024] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0025] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A PE coating thickness uniformity adjustment die head, comprising an upper die (1) and a lower die (2), characterized in that, Both ends of the upper mold (1) and the lower mold (2) are provided with a set of mounting plates (3), one of the mounting plates (3) is provided with an adjusting head (4), the outer side wall of the upper mold (1) is fixedly connected with a protruding edge (5), both sides of the upper mold (1) and the lower mold (2) are provided with baffles (6), the baffles (6) are provided between the upper mold (1) and the mounting plate (3), the mounting plate (3) and the baffles (6) are fixed to the upper mold (1) and the lower mold (2) by bolts, an adjusting rod (7) is rotatably connected inside the upper mold (1), the end of the adjusting rod (7) passes through one of the mounting plates (3) and is fixedly connected to the adjusting head (4), a plurality of equidistant connecting sleeves (8) are fixedly connected below the protruding edge (5), a mold lip (9) is provided on one side of the upper mold (1) and the lower mold (2), and an adjusting component is provided on the upper mold (1).

2. The PE coating thickness uniformity adjustment die head according to claim 1, characterized in that, The adjustment assembly includes a sliding sleeve (13) slidably connected to the connecting sleeve (8), a plurality of equidistant adjusting nuts (11) are provided above the protruding edge (5), a plurality of springs (12) are provided between the adjusting nuts (11) and the protruding edge (5), a bent part (21) is provided on the upper mold (1), and an adjusting baffle (22) is fixedly connected to the upper mold (1) at the gap between the mold lips (9), the length of the adjusting baffle (22) matches the length of the mold lips (9).

3. The PE coating thickness uniformity adjustment die head according to claim 2, characterized in that, The convex edge (5) is rotatably provided with a collar (23), and the circumferential side wall of the collar (23) is circumferentially distributed with gear teeth (24). The outer circumferential side wall of the adjusting rod (7) is provided with helical teeth. The collar (23) is engaged with the helical teeth on the adjusting rod (7) through the gear teeth (24).

4. The PE coating thickness uniformity adjustment die head according to claim 2, characterized in that, The outer wall of the sliding sleeve (13) is fixedly connected to a slide table (25), and the sliding sleeve (13) is slidably connected to the inner wall of the connecting sleeve (8) through the slide table (25).

5. The PE coating thickness uniformity adjustment die head according to claim 4, characterized in that, The bottom end of the adjusting nut (11) is fixedly connected to the adjusting stud (26), the spring (12) is sleeved on the adjusting stud (26), the adjusting stud (26) passes through the collar (23), the sliding sleeve (13) and the die lip (9), and the bottom end of the adjusting stud (26) abuts against the side wall of the adjusting baffle (22).

6. The PE coating thickness uniformity adjustment die head according to claim 5, characterized in that, The top sidewall of the adjusting stud (26) is provided with a first external thread, and the top inner sidewall of the collar (23) is provided with a first internal thread. The adjusting stud (26) and the collar (23) are connected by a threaded engagement.

7. The PE coating thickness uniformity adjustment die head according to claim 3, characterized in that, The bottom end of the sliding sleeve (13) is arc-shaped, and the arc-shaped bottom end of the sliding sleeve (13) abuts against the bent part (21). The inner side wall of the sliding sleeve (13) is provided with a second internal thread, and the bottom outer side wall of the collar (23) is provided with a second external thread. The sliding sleeve (13) and the collar (23) are connected by threaded engagement.

Images