Standard hot melt adhesive coating die head

Abstract

The invention provides a standard hot melt adhesive coating die head which comprises an upper die body, a lower die body and a gasket located between the upper die body and the lower die body, the upper die body, the lower die body and the gasket are connected into a whole through die locking screws, the lower die body is provided with a lower die feeding channel, and the top face of the front portion of the lower die body is provided with a first-stage buffer groove in the breadth direction. The bottom of the first-stage buffer groove communicates with the lower die feeding channel, a series of runner grooves distributed in the front-back direction are evenly distributed in the position, on the front side of the first-stage buffer groove, of the top face of the lower die body in the breadth direction, a series of vertically-formed threaded holes are formed in the upper die body in the breadth direction, and adjusting screw rods are in threaded connection with the interiors of the threaded holes; the bottom of the adjusting screw rod is inserted into the runner groove to adjust the height of the runner, a secondary buffer groove is formed in the top face of the lower die body at the front end of the runner groove in the breadth direction, the gaskets are located on the rear side, the left side and the right side of the primary buffer groove, and an extrusion channel is formed in the front area between the upper die body and the lower die body under guiding of the gaskets. The hot melt adhesive extrusion device can ensure that the extruded hot melt adhesive is uniform in thickness in different breadth directions.

Description

Technical Field

[0001] The invention relates to the technical field of coating die heads, in particular to a standard hot melt adhesive coating die head. Background Art

[0002] The standard hot melt adhesive coating die head is used to coat hot melt adhesive. The application range of hot melt adhesive is very wide. Because of its characteristics of fast bonding, high strength, water resistance and heat resistance, it covers almost all fields that need bonding, such as paper gift boxes, labels, food packaging, medical packaging, etc.

[0003] The current die is restricted by its own structure, making it difficult to ensure uniform coating thickness in the width direction of the final extruded product. In addition, the sealing performance of the die is not good enough, which is prone to leakage and material volatilization, resulting in waste. Summary of the invention

[0004] In view of the above problems, the present invention aims to provide a standard hot melt adhesive coating die head, which can ensure that the thickness of the extruded hot melt adhesive is uniform in different width directions, thereby ensuring high precision of the extrusion quality.

[0005] The technical solution of the present invention is a standard hot melt adhesive coating die head, characterized in that: it includes an upper mold body, a lower mold body, and a gasket located therebetween, the above three are connected into one by a locking screw, the lower mold body is provided with a lower mold feed channel, the front top surface of the lower mold body is provided with a primary buffer groove along the width direction, the bottom of the primary buffer groove is connected with the lower mold feed channel, the top surface of the lower mold body in front of the primary buffer groove is uniformly distributed with a series of flow channel grooves arranged in the front and rear directions along the width direction, the upper mold body is provided with a series of vertically arranged threaded holes along the width direction, the threaded holes are threadedly connected with adjusting screws, and after each adjusting screw is rotated, the bottom is inserted into a corresponding flow channel groove to adjust the flow channel height in the flow channel groove at that location, the top surface of the lower mold body at the front end of the flow channel groove is provided with a secondary buffer groove along the width direction, the gasket is located at the rear side and left and right side areas of the primary buffer groove, and the front area between the upper mold body and the lower mold body forms an extrusion channel under the guidance of the gasket.

[0006] Preferably, the bottom surface of the lower mold body is connected to a feed body, at least two feed ports are provided on the rear side of the feed body, a three-level buffer groove is provided on the front top surface of the feed body along the width direction, the feed port is connected inwardly to the bottom of the three-level buffer groove through a three-level feed channel, the lower mold feed channel is distributed on the bottom surface of the lower mold body, and the top of the three-level buffer groove is connected to the lower mold feed channel.

[0007] Preferably, the number of the lower mold feed channels is three, distributed at the left, middle and right positions of the bottom surface of the lower mold body. The spacing between two adjacent lower mold feed channels, the spacing between the left lower mold feed channel and the left side of the lower mold body, and the spacing between the right lower mold feed channel and the right side of the lower mold body are all corresponding.

[0008] Preferably, the bottom surface of the lower mold body is connected to two left and right feed blocks, and a feed port is provided on the feed block. There are two lower mold feed channels, which are distributed in the left and right areas of the bottom surface of the lower mold. The two feed ports are respectively connected to the two lower mold feed channels through internal flow channels.

[0009] Preferably, the locking screws are a front-to-back double-row structure, the rear row of locking screws are located at the rear of the upper mold body and correspond to the rear area of ​​the primary buffer groove of the lower mold body, and the front row of locking screws are located at the front of the upper mold body and correspond to the position between the runner grooves of the lower mold body.

[0010] Preferably, a series of electric heating holes for controlling the temperature of the mold body are evenly arranged on the lower mold body.

[0011] Preferably, the lower portion of the front side surface of the lower mold body is connected with an outwardly extending anti-collision baffle.

[0012] The present invention can ensure that the extruded hot melt adhesive has uniform thickness in different width directions, so that the velocity vectors of the raw material in different width directions tend to be consistent during the extrusion process, thereby ensuring high precision of the extrusion quality, and adopting double-row locking screws to ensure good sealing of the die head. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the first structure of the present invention; Figure 2 for Figure 1 Exploded diagram of Figure 3 for Figure 1 Schematic diagram of the internal structure; Figure 4 It is a second structural schematic diagram of the present invention; Figure 5 for Figure 4 A schematic diagram of the structure from another perspective; Figure 6 for Figure 5 Exploded diagram of Figure 7 for Figure 4 Schematic diagram of the internal structure; Figure 8 It is a third structural schematic diagram of the present invention; Fig. 9 for Figure 8 Exploded diagram of Fig.10 for Figure 8 Schematic diagram of the internal structure; Among them: 1—upper mold body; 11—threaded hole; 2—lower mold body; 21—lower mold feed channel; 22—first-level buffer groove; 23—flow channel groove; 24—second-level buffer groove; 25—electric heating hole; 3—gasket; 4—locking screw; 5—adjusting screw; 6—extrusion channel; 7—feed body; 71—feed port; 72—third-level buffer groove; 73—third-level feed channel; 8—feed block; 9—anti-collision baffle. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0015] like Figures 1 to 3 As shown, the present invention provides a standard hot melt adhesive coating die head, characterized in that: it includes an upper die body 1, a lower die body 2, and a gasket 3 located therebetween, the above three are connected as a whole by a locking screw 4, the lower die body 2 is provided with a lower die feed channel 21, the front top surface of the lower die body 2 is provided with a primary buffer groove 22 along the width direction, the bottom of the primary buffer groove 22 is connected to the lower die feed channel 21, and the top surface of the lower die body 2 in front of the primary buffer groove 22 is evenly distributed with a series of flow channel grooves arranged in the front and rear directions along the width direction 23, the upper mold body 1 is provided with a series of vertically arranged threaded holes 11 along the width direction, and the threaded holes 11 are internally threadedly connected with adjusting screws 5. After each adjusting screw 5 is rotated, the bottom is inserted into a corresponding flow channel 23 to adjust the flow channel height in the flow channel 23 at that location. The top surface of the lower mold body 2 at the front end of the flow channel 23 is provided with a secondary buffer groove 24 along the width direction, and the gasket 3 is located at the rear side and left and right side areas of the primary buffer groove 22. The front area between the upper mold body 1 and the lower mold body 2 forms an extrusion channel 6 under the guidance of the gasket 3.

[0016] like Figures 4 to 7As shown, the present invention provides a standard hot melt adhesive coating die head, which is characterized in that: it includes an upper mold body 1, a lower mold body 2, and a gasket 3 located therebetween, the above three are connected into one by a locking screw 4, the lower mold body 2 is provided with a lower mold feed channel 21, the front top surface of the lower mold body 2 is provided with a primary buffer groove 22 along the width direction, the bottom of the primary buffer groove 22 is connected with the lower mold feed channel 21, the top surface of the lower mold body 2 in front of the primary buffer groove 22 is evenly distributed with a series of flow channel grooves 23 arranged in the front and rear directions along the width direction, the upper mold body 1 is provided with a series of vertically arranged threaded holes 11 along the width direction, the threaded hole 11 is threadedly connected with an adjusting screw 5, and after each adjusting screw 5 is rotated, the bottom is inserted into a corresponding flow channel groove 23 is used to adjust the flow channel height in the flow channel 23, and a secondary buffer groove 24 is arranged on the top surface of the lower mold body 2 at the front end of the flow channel 23 along the width direction, and the gasket 3 is located at the rear side and left and right side areas of the primary buffer groove 22, and the front area between the upper mold body 1 and the lower mold body 2 forms an extrusion channel 6 under the guidance of the gasket 3; the bottom surface of the lower mold body 2 is connected with a feed body 7, and at least two feed ports 71 are arranged on the rear side of the feed body 7, and a tertiary buffer groove 72 is arranged on the front top surface of the feed body 7 along the width direction, and the feed port 71 is connected inwardly to the bottom of the tertiary buffer groove 72 through the tertiary feed channel 73, and the lower mold feed channel 21 is distributed on the bottom surface of the lower mold body 2, and the top of the tertiary buffer groove 72 is connected to the lower mold feed channel 21.

[0017] Among them, the number of the lower mold feed channels 21 is three, distributed at the left, middle and right positions of the bottom surface of the lower mold body 2, and the spacing between two adjacent lower mold feed channels 21, the spacing between the left lower mold feed channel 21 and the left side of the lower mold body 2, and the spacing between the right lower mold feed channel 21 and the right side of the lower mold body 2 are all corresponding.

[0018] like Figures 8 to 10As shown, the present invention provides a standard hot melt adhesive coating die head, characterized in that: it includes an upper die body 1, a lower die body 2, and a gasket 3 located therebetween, the above three are connected as a whole by a locking screw 4, the lower die body 2 is provided with a lower die feed channel 21, the front top surface of the lower die body 2 is provided with a primary buffer groove 22 along the width direction, the bottom of the primary buffer groove 22 is connected with the lower die feed channel 21, the top surface of the lower die body 2 in front of the primary buffer groove 22 is uniformly distributed with a series of flow channel grooves 23 arranged in the front and rear directions along the width direction, the upper die body 1 is provided with a series of vertically arranged threaded holes 11 along the width direction, and the threaded holes 11 are internally threaded with adjusting screws 5 After each adjusting screw 5 is rotated, the bottom is inserted into a corresponding flow channel 23 to adjust the flow channel height in the flow channel 23 at that location. A secondary buffer groove 24 is provided on the top surface of the lower mold body 2 at the front end of the flow channel 23 along the width direction. The gasket 3 is located at the rear side and the left and right side areas of the primary buffer groove 22. The front area between the upper mold body 1 and the lower mold body 2 forms an extrusion channel 6 under the guidance of the gasket 3; the bottom surface of the lower mold body 2 is connected to two left and right feed blocks 8, and a feed port is provided on the feed block 8. There are two lower mold feed channels 21, which are distributed in the left and right areas of the bottom surface of the lower mold 2. The two feed ports are respectively connected to the two lower mold feed channels 21 through the internal flow channel.

[0019] Specifically, the mold locking screws 4 are of a front-to-back double-row structure, the rear-row mold locking screws 4 are located at the rear of the upper mold body 1 and correspond to the rear area of ​​the primary buffer groove 22 of the lower mold body 2, and the front-row mold locking screws 4 are located at the front of the upper mold body 1 and correspond to the position between the flow channel grooves 23 of the lower mold body 2. The front-to-back double-row mold locking screws 4 are used to improve the sealing performance of the mold body and reduce the volatilization of the material.

[0020] In addition, a series of electric heating holes 25 for controlling the temperature of the mold body are evenly arranged on the lower mold body 2. It is used to control the stability of the temperature of the mold body.

[0021] Furthermore, the lower part of the front side of the lower mold body 2 is connected with an outwardly extending anti-collision baffle 9. During the installation process with the front roller, when the mold body moves forward, the anti-collision baffle 9 will first contact the roller relative to the die lip to prevent the die lip from hitting and affecting the accuracy of the extrusion channel 6.

[0022] The present invention adopts three feeding structures: The first method is that the lower mold body 2 is fed directly through the lower mold feed channel 21. The feed port can be one or more. The raw material passes through the primary buffer groove 22, the flow channel groove 23, and the secondary buffer groove 24 and is evenly extruded from the extrusion channel 6. The adjusting screw 5 is used to adjust the height of the flow channel at the flow channel groove 23.

[0023] The second method is to set a whole feed body 7 at the bottom of the lower mold body 2, and at least two feed ports 71 are set on the rear side of the feed body 7, and a three-level buffer groove 72 is set on the front top surface of the feed body 7 along the width direction. After the raw material enters through the feed port 71, it passes through the feed port 71 inward through the three-level feed channel 73 and is connected with the bottom of the three-level buffer groove 72. After the raw material fills the three-level buffer groove 72, it goes upward through the lower mold feed channel 21 to fill the first buffer groove 22. After filling, the raw material passes forward through the flow channel groove 23 to enter the second buffer groove 24. After the raw material overflows, it is evenly extruded through the extrusion channel 6, and the adjusting screw 5 is used to adjust the height of the flow channel at the flow channel groove 23.

[0024] The third type is to set two left and right feed blocks 8 at the bottom of the lower mold body 2, and a feed port is set on the rear side of the feed block 8. After the raw material enters from the feed port, it is connected with the left and right lower mold feed channels 21 respectively through the internal flow channel, and the left and right lower mold feed channels 21 go upward to fill the first-level buffer groove 22. After filling, the raw material passes through the flow channel groove 23 and moves forward to the second-level buffer groove 24. After the raw material overflows, it is evenly extruded through the extrusion channel 6, and the adjusting screw 5 is used to adjust the height of the flow channel at the flow channel groove 23.

[0025] 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 standard hot melt adhesive coating die head, characterized in that: The present invention comprises an upper mold body (1), a lower mold body (2), and a gasket (3) located therebetween, wherein the three are connected as a whole by a locking screw (4), the lower mold body (2) is provided with a lower mold feed channel (21), a first-level buffer groove (22) is provided on the front top surface of the lower mold body (2) along the width direction, the bottom of the first-level buffer groove (22) is connected to the lower mold feed channel (21), a series of flow channel grooves (23) arranged in the front-to-back direction are evenly distributed on the top surface of the lower mold body (2) in the front side of the first-level buffer groove (22) along the width direction, and the upper mold body (1) is provided with a first-level buffer groove (22) along the width direction. A series of vertically arranged threaded holes (11) are provided, and an adjusting screw (5) is connected to the inner thread of the threaded hole (11). After each adjusting screw (5) is rotated, the bottom is inserted into a corresponding flow channel (23) to adjust the flow channel height in the flow channel (23) at that location. A secondary buffer groove (24) is provided on the top surface of the lower mold body (2) at the front end of the flow channel (23) along the width direction. The gasket (3) is located at the rear side and left and right side areas of the primary buffer groove (22). The front area between the upper mold body (1) and the lower mold body (2) forms an extrusion channel (6) under the guidance of the gasket (3).

2. A standard hot melt adhesive coating die head according to claim 1, characterized in that: The bottom surface of the lower mold body (2) is connected to a feed body (7), the rear side surface of the feed body (7) is provided with at least two feed ports (71), the front top surface of the feed body (7) is provided with a three-level buffer groove (72) along the width direction, the feed port (71) is inwardly connected to the bottom of the three-level buffer groove (72) through a three-level feed channel (73), the lower mold feed channel (21) is distributed on the bottom surface of the lower mold body (2), and the top of the three-level buffer groove (72) is connected to the lower mold feed channel (21).

3. A standard hot melt adhesive coating die head according to claim 2, characterized in that: The number of the lower die feed channels (21) is three, which are distributed at the left, middle and right positions of the bottom surface of the lower die body (2); the spacing between two adjacent lower die feed channels (21), the spacing between the left lower die feed channel (21) and the left side surface of the lower die body (2), and the spacing between the right lower die feed channel (21) and the right side surface of the lower die body (2) are all corresponding.

4. A standard hot melt adhesive coating die head according to claim 1, characterized in that: The bottom surface of the lower mold body (2) is connected to two left and right feed blocks (8), and the feed block (8) is provided with a feed port. The number of the lower mold feed channels (21) is two and they are distributed in two left and right areas of the bottom surface of the lower mold (2). The two feed ports are respectively connected to the two lower mold feed channels (21) through internal flow channels.

5. A standard hot melt adhesive coating die according to any one of claims 1 to 4, characterized in that: The locking screws (4) are of a front-to-back double-row structure, wherein the rear-row locking screws (4) are located at the rear of the upper mold body (1) and correspond to the rear area of ​​the primary buffer groove (22) of the lower mold body (2), and the front-row locking screws (4) are located at the front of the upper mold body (1) and correspond to the position between the flow channel grooves (23) of the lower mold body (2).

6. A standard hot melt adhesive coating die according to any one of claims 1 to 4, characterized in that: The lower mold body (2) is evenly provided with a series of electric heating holes (25) for controlling the temperature of the mold body.

7. A standard hot melt adhesive coating die according to any one of claims 1 to 4, characterized in that: The lower portion of the front side surface of the lower mold body (2) is connected to an outwardly extending anti-collision baffle (9).

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