A surround-flow diverter die for a coating extruder

Abstract

This utility model provides a surrounding flow-dividing die head for a coating extruder, applicable to the field of water-based adhesive coating equipment technology. It has a die cavity with an inlet and an outlet facing each other on the side wall of the die cavity. A buffer plate is located below the inlet, and the buffer plate has an adjustment section and a buffer section. One end of the adjustment section extends to the outside of the die cavity and is rotatably connected to it. An extruder is located on the outside of the adjustment section to compress and rotate the adjustment section, thereby causing the buffer section to rotate inside the die cavity. This allows for flexible adjustment of the buffering force and flow channel space of the buffer plate according to the viscosity of the water-based adhesive.

Description

Technical Field

[0001] This application relates to the field of water-based adhesive coating equipment technology, and in particular to a surrounding diversion die head for a coating extruder. Background Technology

[0002] In the coating extrusion process, the die head is the core component, and its internal flow channel design directly affects the coating uniformity of water-based adhesives.

[0003] Existing surround flow-dividing dies typically employ a fixed flow channel structure. When processing water-based adhesives of varying viscosities, high-viscosity adhesives are prone to stagnation and uneven pressure within the flow channel, while low-viscosity adhesives are prone to excessive flow rate and uncontrolled diffusion, resulting in defects such as thickness deviations, streaks, and bubbles in the coated products.

[0004] While some buffer structures exist in existing technologies, they are mostly baffles or guide blocks with fixed angles, which cannot flexibly adjust the buffering force and flow channel space according to the viscosity of water-based adhesives.

[0005] In summary, existing technologies often use baffles or guide blocks with fixed angles inside the mold head, which cannot flexibly adjust the buffering force and flow channel space according to the viscosity of the water-based adhesive. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of this application is to overcome the defects of the prior art and provide a surrounding flow-dividing die head for a coating extruder. By setting an adjustable-angle buffer device, it can achieve precise buffering of water-based adhesives of different viscosities and improve the coating uniformity.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0008] A coating extruder with a surrounding flow-dividing die head includes: a die cavity, on which a glue inlet and a glue outlet are provided on the side wall, the glue inlet and the glue outlet being positioned opposite each other.

[0009] The buffer plate is configured to have an adjustment section and a buffer section. The adjustment section passes through the mold cavity and extends to the outside of the mold cavity. The buffer section is located inside the mold cavity and is inclined toward the center of the mold cavity. The adjustment section is rotatably connected to the mold cavity via a rotating shaft. An extrusion member is provided on the outside of the adjustment section to extrude the adjustment section and drive it to rotate along the rotating shaft.

[0010] Furthermore, multiple buffer plates are provided, and the multiple buffer plates are evenly distributed around the circumference of the mold cavity.

[0011] Furthermore, an exhaust hole is provided on the mold cavity.

[0012] Furthermore, the extruder has a housing covering the outside of the adjusting section, the housing being fixedly connected to the outer wall of the mold cavity, an adjusting bolt being threadedly connected to one side of the housing, the adjusting bolt being located inside the housing and abutting against the adjusting section, and a spring being fixedly connected between the adjusting section and the housing on the side of the adjusting section away from the adjusting bolt.

[0013] Furthermore, it also includes: a flow divider block located upstream of the buffer plate, the flow divider block being configured to have a connecting section and a flow divider section, the connecting section being fixedly connected to the inner wall of the mold cavity, the flow divider section being fixedly connected to the end of the connecting section away from the inner wall of the mold cavity, the upstream of the flow divider section being directly opposite the injection port, and the downstream of the flow divider section being inclined outward to form a conical shape that is narrower at the top and wider at the bottom.

[0014] Furthermore, multiple diversion channels are provided on the diversion section, and the multiple diversion channels are evenly distributed around the circumference of the diversion section.

[0015] Furthermore, a flow-gathering plate is provided downstream of the buffer plate. The flow-gathering plate is inclined towards the center of the mold cavity, and the end of the flow-gathering plate extends above the glue outlet and forms a flow hole for glue to flow out.

[0016] Compared to existing technologies, the advantages of this application are: By installing a buffer plate rotatably connected to the mold cavity inside the mold cavity, and installing an adjusting belt extruder on the outside of the buffer plate that can drive the buffer plate to rotate, when the viscosity of the water-based adhesive is high, the flow rate of the adhesive is slow. At this time, by adjusting the angle of the buffer plate by the extruder to increase its tilt angle, the buffer plate rotates towards the inner wall of the mold cavity, which can reduce the flow resistance of the high viscosity water-based adhesive in the mold cavity. When the viscosity of the water-based adhesive is low, the flow rate of the adhesive is fast. At this time, by adjusting the angle of the buffer plate by the extruder to decrease its tilt angle, the buffer plate rotates towards the center of the mold cavity, which can reduce the flow rate of the high viscosity water-based adhesive in the mold cavity. Thus, the buffering force and flow channel space can be flexibly adjusted according to the viscosity of the water-based adhesive. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a cross-sectional structural diagram of the mold cavity and extruded part of this application; Figure 3 This is a schematic diagram showing the location of the flow divider block inside the mold cavity in this application.

[0018] Explanation of the labels in the diagram: 1. Mold cavity; 2. Inlet; 3. Outlet; 4. Buffer plate; 41. Adjustment section; 42. Buffer section; 5. Extrusion part; 51. Housing; 52. Adjusting bolt; 53. Spring; 6. Diverter block; 61. Connecting section; 62. Diverter section; 63. Diverter groove; 7. Flow plate; 8. Flow hole; 9. Vent hole. Detailed Implementation

[0019] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] Please see Figure 1-3 This utility model provides a surrounding flow-dividing die head for a coating extruder, which mainly features a rotatable and adjustable buffer plate. By rotating the angle of the buffer plate, the flow rate and buffering force of water-based adhesives of different viscosities inside the die head can be adjusted.

[0021] Specifically, the mold head includes: a mold cavity 1, on which a glue inlet 2 and a glue outlet 3 are provided, with the glue inlet 2 and the glue outlet 3 positioned opposite each other.

[0022] The buffer plate 4 is configured to have an adjustment section 41 and a buffer section 42. The adjustment section 41 passes through the mold cavity 1 and extends to the outside of the mold cavity 1. The buffer section 42 is located inside the mold cavity 1 and is inclined towards the center of the mold cavity 1. The adjustment section 41 is rotatably connected to the mold cavity 1 through a rotating shaft. An extrusion member 5 is provided on the outside of the adjustment section 41 to extrude the adjustment section 41 and drive it to rotate along the rotating shaft.

[0023] Among them, the extrusion adjustment section 41 of the extrusion component 5 can rotate around the rotating shaft, thereby driving the buffer section 42 to rotate in the mold cavity 1, so as to realize the angle adjustment of the buffer plate 4.

[0024] The rotating shaft and the mold cavity 1 are sealed and rotated together to prevent glue from overflowing from the rotating shaft into the mold cavity 1.

[0025] In this manner, the water-based adhesive enters the mold cavity 1 through the inlet 2, falls onto the buffer plate 4 for cushioning, and then flows out through the outlet 3. When the viscosity of the water-based adhesive is high, the flow rate of the adhesive is slow. At this time, the angle of the buffer plate 4 is adjusted by the extruder 5 to increase its tilt angle. The buffer plate 4 rotates towards the inner wall of the mold cavity 1, which can reduce the flow resistance of the high-viscosity water-based adhesive in the mold cavity 1. When the viscosity of the water-based adhesive is low, the flow rate of the adhesive is fast. At this time, the angle of the buffer plate 4 is adjusted by the extruder 5 to decrease its tilt angle. The buffer plate 4 rotates towards the center of the mold cavity 1, which can reduce the flow rate of the high-viscosity water-based adhesive in the mold cavity 1.

[0026] Multiple buffer plates 4 are provided, and the multiple buffer plates 4 are evenly distributed around the circumference of the mold cavity 1.

[0027] To ensure that the trapped air can be expelled from the mold cavity 1 in a timely manner, the following technical solution is provided: Specifically, an exhaust hole 9 is provided on the mold cavity 1.

[0028] In this way, the air trapped inside the mold cavity 1 can be discharged in time through the vent hole 9, avoiding the generation of air bubbles during coating.

[0029] The extrusion member 5 drives the adjustment section 41 to rotate through the extrusion force. It only needs to be able to drive the buffer plate 4 to rotate. In this regard, the following preferred embodiment is provided: Specifically, the extrusion member 5 has a housing 51 covering the outside of the adjustment section 41. The housing 51 is fixedly connected to the outer wall of the mold cavity 1. An adjustment bolt 52 is threadedly connected to one side of the housing 51. The side of the adjustment bolt 52 located inside the housing 51 abuts against the adjustment section 41. A spring 53 is fixedly connected between the side of the adjustment section 41 away from the adjustment bolt 52 and the housing 51.

[0030] The contact part between the adjusting bolt 52 and the adjusting section 41 is spherical, which can reduce the wear on the adjusting section 41 during adjustment.

[0031] In this way, when adjusting the angle of the buffer plate 4, the adjusting bolt 52 is rotated. When the adjusting bolt 52 moves downward, it presses the adjusting section 41, causing the buffer section 42 to rotate upward. When the adjusting bolt 52 moves upward, the elastic force of the spring 53 presses the adjusting section 41, causing the buffer section 42 to rotate downward, thus achieving angle adjustment.

[0032] Adjusting the angle of the buffer plate 4 allows for flexible adjustment of the buffering force for water-based adhesives of different viscosities, and can also, to a certain extent, evenly distribute the water-based adhesive within the mold cavity 1. However, if the water-based adhesive flows directly from the inlet 2 onto the buffer plate 4, it may cause severe uneven distribution of the adhesive on the buffer plate 4, resulting in uneven dispensing. To address this, the following preferred embodiment is provided: Specifically, it also includes: a flow divider block 6, located upstream of the buffer plate 4. The flow divider block 6 is configured to have a connecting section 61 and a flow divider section 62. The connecting section 61 is fixedly connected to the inner wall of the mold cavity 1. The flow divider section 62 is fixedly connected to the end of the connecting section 61 away from the inner wall of the mold cavity 1. The upstream of the flow divider section 62 is directly opposite the inlet 2. The downstream of the flow divider section 62 is inclined outward to form a conical shape that is narrow at the top and wide at the bottom.

[0033] Multiple diversion channels 63 are provided on the diversion section 62, and the multiple diversion channels 63 are evenly distributed around the circumference of the diversion section 62.

[0034] In this way, after the water-based adhesive enters the mold cavity 1, the adhesive gathered at the top of the diversion section 62 is diverted to the surrounding area through the diversion channel 63, so that the adhesive can be evenly diverted to the surrounding area and flow evenly onto the multiple buffer plates 4 below.

[0035] To enable the water-based adhesive to quickly aggregate after diversion and buffering, and to facilitate its flow from the center of the outlet 3, the following preferred embodiments are provided: Specifically, a flow-gathering plate 7 is provided downstream of the buffer plate 4. The flow-gathering plate 7 is inclined towards the center of the mold cavity 1, and the end of the flow-gathering plate 7 extends above the glue outlet 3 and forms a flow hole 8 for glue to flow out.

[0036] In this way, the water-based adhesive flows onto the flow-concentrating plate 7 after being buffered by the buffer plate 4. The flow-concentrating plate 7 concentrates the dispersed water-based adhesive, so that the water-based adhesive flows into the outlet 3 from the middle above the outlet 3 through the flow hole 8, making the water-based adhesive more evenly distributed when flowing into the outlet 3.

[0037] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and its improved concept, should be covered within the scope of protection of this application.

Claims

1. A surrounding flow-dividing die head for a coating extruder, characterized in that, have: The mold cavity (1) has a glue inlet (2) and a glue outlet (3) on its side wall, and the glue inlet (2) and the glue outlet (3) are positioned opposite each other; The buffer plate (4) is configured to have an adjustment section (41) and a buffer section (42). The adjustment section (41) passes through the mold cavity (1) and extends to the outside of the mold cavity (1). The buffer section (42) is located inside the mold cavity (1) and is inclined toward the center of the mold cavity (1). The adjustment section (41) is rotatably connected to the mold cavity (1) through a rotating shaft. An extrusion member (5) is provided on the outside of the adjustment section (41) to extrude the adjustment section (41) and drive it to rotate along the rotating shaft.

2. The surrounding flow-dividing die head of a coating extruder according to claim 1, characterized in that, Multiple buffer plates (4) are provided, and the multiple buffer plates (4) are evenly distributed around the circumference of the mold cavity (1).

3. The surrounding flow-dividing die head of a coating extruder according to claim 1, characterized in that: An exhaust hole (9) is provided on the mold cavity (1).

4. The surrounding flow-dividing die head of a coating extruder according to claim 1, characterized in that: The extruder (5) has a housing (51) covering the outside of the adjusting section (41). The housing (51) is fixedly connected to the outer wall of the mold cavity (1). An adjusting bolt (52) is threadedly connected to one side of the housing (51). The adjusting bolt (52) is located inside the housing (51) and abuts against the adjusting section (41). A spring (53) is fixedly connected between the adjusting section (41) away from the adjusting bolt (52) and the housing (51).

5. The surrounding flow-dividing die head of a coating extruder according to claim 1, characterized in that, It also has: The flow divider block (6) is located upstream of the buffer plate (4). The flow divider block (6) is configured to have a connecting section (61) and a flow divider section (62). The connecting section (61) is fixedly connected to the inner wall of the mold cavity (1). The flow divider section (62) is fixedly connected to the end of the connecting section (61) away from the inner wall of the mold cavity (1). The upstream of the flow divider section (62) is directly opposite the glue inlet (2). The downstream of the flow divider section (62) is inclined to the outside, forming a cone shape that is narrow at the top and wide at the bottom.

6. The surrounding flow-dividing die head of a coating extruder according to claim 5, characterized in that: Multiple diversion channels (63) are provided on the diversion section (62), and the multiple diversion channels (63) are evenly distributed around the diversion section (62) in a circumferential direction.

7. The surrounding flow-dividing die head of a coating extruder according to claim 1, characterized in that: A flow-gathering plate (7) is provided downstream of the buffer plate (4). The flow-gathering plate (7) is inclined toward the center of the mold cavity (1). The end of the flow-gathering plate (7) extends above the glue outlet (3) and forms a flow hole (8) for glue to flow out.

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