Inner blocking type hot melt adhesive coating die head

Abstract

The utility model provides an inner blocking type hot melt adhesive coating die head which comprises an upper die body, a lower die body and a gasket arranged 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 a die locking screw, the lower die body is provided with a lower die feeding channel, and a first-stage buffer groove is formed in the rear area of the top face of the lower die body in the breadth direction. The bottom of the first-stage buffer groove is communicated with a lower die feeding channel, a series of flow channel 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, adjusting grooves penetrating through the die bodies in the breadth direction are formed in the positions, located in front of the flow channel grooves, of the upper die body and the lower die body, and annular sealing grooves are formed in the two ends of each adjusting groove. The gasket is located in the rear side area of the first-stage buffer groove, and an extrusion channel is formed between the upper die body and the lower die body and located in the front side area of the gasket. Inner baffle breadth adjusting mechanisms are arranged on the left side and the right side of the lower die body. According to the invention, the thickness of the extruded hot melt adhesive in different breadth directions can be ensured to be uniform and consistent, and the breadth of the product can be adjusted while online production is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating die, in particular to an inner blocking type hot melt adhesive coating die. BACKGROUND

[0002] The standard hot melt adhesive coating die is used for coating hot melt adhesive, and the application range of the hot melt adhesive is very wide, because the hot melt adhesive has the characteristics of rapid adhesion, high strength, water resistance, heat resistance and the like, and almost covers all fields requiring adhesion, such as paper gift boxes, labeling, food packaging, medical packaging and the like.

[0003] At present, the die is subject to its own structure, so that it is difficult to ensure the uniformity of the coating thickness of the final extruded product in the width direction, and the sealing performance of the die is not good enough, and leakage and material volatilization are easy to occur, causing waste.

[0004] At the same time, the standard hot melt adhesive die can only produce single-width products, and different dies need to be replaced when producing different-width products, which causes long equipment downtime when replacing the die, and the die is easy to be damaged and the replacement process is complicated. SUMMARY

[0005] In view of the above problems, the present application aims to provide an inner blocking type hot melt adhesive coating die which can ensure the uniform thickness of the extruded hot melt adhesive in different width directions and adjust the width of the product while online production.

[0006] The technical scheme of the present application is an inner blocking type hot melt adhesive coating die, which comprises an upper die body, a lower die body and a gasket arranged therebetween, the above-mentioned three are connected into one body through locking screws, the lower die body is provided with a lower die feeding channel, the top surface of the lower die body in the rear region is provided with a first buffer groove along the width direction, the bottom of the first buffer groove is communicated with the lower die feeding channel, a series of flow channel grooves arranged in front and back directions are uniformly distributed on the top surface of the lower die body in front of the first buffer groove along the width direction, the upper die body and the lower die body are provided with an adjusting groove penetrating the die body along the width direction at the front of the flow channel groove, and annular sealing grooves are arranged at both ends of the adjusting groove, a second buffer groove is arranged on the surface of the lower die body in front of the sealing groove along the width direction, the gasket is located in the rear region of the first buffer groove, and an extrusion channel is formed between the upper die body and the lower die body in the front region of the gasket; the left and right sides of the lower die body are provided with an inner blocking width adjusting mechanism, the inner blocking width adjusting mechanism comprises an adjusting plug rod which can be operated transversely and extended and retracted, and an inner blocking piece connected to the adjusting plug rod, the adjusting plug rod is inserted into the adjusting groove and sealed through the sealing elements at both ends of the sealing groove, the thickness of the inner blocking piece is consistent with the thickness of the extrusion channel, and the movement of the adjusting plug rod along the width direction makes the inner blocking piece block the extrusion channel corresponding to the width in front of the end.

[0007] Preferably, the inner baffle width adjusting mechanism comprises connecting frames connected to the left and right sides of the lower die body, a lead screw is rotatably installed on the connecting frame through a bearing, guide rods are fixedly connected to the two sides of the lead screw, a sliding block is sleeved on the guide rod, a threaded hole is arranged in the middle region of the sliding block and is threadedly connected with the lead screw, an adjusting plug rod is connected to the sliding block, a hand wheel is connected to the outer end of the lead screw, rotating the hand wheel drives the lead screw to rotate, and then the adjusting plug rod is driven to move forward or backward through the sliding block, so that the inner baffle blocks the extrusion channel of the corresponding region on the front side.

[0008] Preferably, a pointer is arranged on the side surface of the sliding block, and a scale mark is correspondingly connected to the side surface of the connecting frame, and the lower end of the pointer corresponds to the scale mark when the sliding block moves forward and backward.

[0009] Preferably, four feeding blocks are arranged on the bottom surface of the lower die body along the width direction, a material flow channel is arranged in the feeding block, a feeding port is arranged on the rear side surface of the feeding block, and a discharging port is arranged on the top surface of the feeding block, a lower die feeding channel is vertically arranged in the lower die body, the lower end of the lower die feeding channel penetrates through the rear of the lower die body and is communicated with the discharging port of the feeding block, and the upper end of the lower die feeding channel is communicated with the bottom surface of the primary buffer groove.

[0010] Preferably, the locking screw is a double-row structure, the rear row of locking screws is located at the rear part of the upper die body and corresponds to the rear side region of the primary buffer groove of the lower die body, and the front row of locking screws is located at the front part of the upper die body and corresponds to the position between the flow channel grooves of the lower die body.

[0011] Preferably, a tertiary buffer groove is arranged on the surface of the lower die body on the front side of the secondary buffer groove along the width direction.

[0012] Preferably, two annular sealing grooves are respectively and uniformly arranged at the left and right ends of the adjusting groove, and the adjusting plug rod is inserted and sealed through a double-layer sealing structure.

[0013] Preferably, the adjusting groove and the adjusting plug rod are both circular in cross section, the adjusting grooves on the bottom surface of the upper die body and the top surface of the lower die body are both semicircular, and the adjusting grooves of the upper die body and the lower die body are circular in cross section after the upper die body and the lower die body are closed.

[0014] Preferably, a series of heating holes are arranged in the lower die body along the front-rear direction, and the heating holes are uniformly arranged in a row along the width direction.

[0015] The present application can ensure that the extruded hot melt adhesive is uniform in thickness in different width directions, the speed vectors of the raw materials in different width directions tend to be consistent in the extrusion process, the width of the product can be adjusted while ensuring online production, the sealing performance of the die head is ensured by adopting the double-row locking screw. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present application.

[0017] Figure 2 is the exploded view of the present application;

[0018] Figure 3 is Figure 2 is the local enlarged view of A in the middle;

[0019] Figure 4 is the structural schematic view of the inner stop width adjusting mechanism in the present application;

[0020] Figure 5 is the structural schematic view of the internal flow channel cross section in the present application;

[0021] Wherein: 1 - upper die body; 2 - lower die body; 21 - lower die feeding channel; 22 - first stage buffer groove; 23 - flow channel groove; 24 - adjusting groove; 241 - annular sealing groove; 25 - second stage buffer groove; 26 - third stage buffer groove; 27 - heating hole; 3 - gasket; 4 - locking screw; 5 - extrusion channel; 6 - inner stop width adjusting mechanism; 61 - adjusting inserting rod; 62 - inner stop piece; 63 - connecting frame; 64 - lead screw; 65 - guide rod; 66 - sliding block; 67 - hand wheel; 68 - pointer; 7 - feeding block. DETAILED DESCRIPTION

[0022] The present application will be further described in detail below in connection with the drawings.

[0023] As Figures 1 to 5As shown, the present application provides an inner blocking hot melt adhesive coating die, which comprises an upper die body 1, a lower die body 2 and a gasket 3 arranged between the two, the above three are connected into one body through locking screws 4, the lower die body 2 is provided with a lower die feeding channel 21, the top surface of the lower die body 2 in the rear area is provided with a first buffer groove 22 along the width direction, the bottom of the first buffer groove 22 is communicated with the lower die feeding channel 21, the top surface of the lower die body 2 in the front side of the first buffer groove 22 is uniformly distributed with a series of flow channel grooves 23 arranged in front and back directions along the width direction, the upper die body 1 and the lower die body 2 are provided with adjusting grooves 24 penetrating the die body along the width direction at the front of the flow channel groove 23, the two ends of the adjusting groove 24 are provided with annular sealing grooves 241, the surface of the lower die body 2 in the front side of the sealing groove 241 is provided with a second buffer groove 25 along the width direction, the gasket 3 is located in the rear side area of the first buffer groove 22, and the extrusion channel 5 is formed between the upper die body 1 and the lower die body 2 in the front side area of the gasket 3; the lower die body 2 is provided with an inner blocking width adjusting mechanism 6 on the left and right sides, the inner blocking width adjusting mechanism 6 comprises an adjusting plug rod 61 which can be operated transversely and stretched and contracted, and an inner blocking piece 62 connected to the adjusting plug rod 61, the adjusting plug rod 61 is inserted into the adjusting groove 24 and sealed through the sealing elements at the two ends of the sealing groove 241, the thickness of the inner blocking piece 62 is consistent with the thickness of the extrusion channel 5, and the movement of the adjusting plug rod 61 along the width direction makes the inner blocking piece 62 block the extrusion channel 5 corresponding to the width in the front end.

[0024] On the basis of the above scheme, the inner blocking width adjusting mechanism 6 comprises a connecting frame 63 connected to the left and right side surfaces of the lower die body 2, a lead screw 64 is installed on the connecting frame 63 through bearing rolling, guide rods 65 are fixedly connected on the two sides of the lead screw 64, a sliding block 66 is sleeved on the guide rod 65, a threaded hole is arranged in the middle area of the sliding block 66 and is threadedly connected with the lead screw 64, the adjusting plug rod 61 is connected on the sliding block 66, a hand wheel 67 is connected to the outer end of the lead screw 64, rotating the hand wheel 67 drives the lead screw 64 to rotate, and then the adjusting plug rod 61 is driven to move forward or backward through the sliding block 66, so that the inner blocking piece 62 blocks the extrusion channel 5 in the corresponding area in the front side.

[0025] Specifically, the sliding block 66 is provided with a pointer 68 on the side surface, and the connecting frame 63 is correspondingly provided with scale marks on the side surface, and the lower end of the pointer 68 corresponds to the scale marks when the sliding block 66 moves forward and backward.

[0026] In addition, four feeding blocks 7 are arranged on the bottom surface of the lower die body 2 along the width direction at intervals, material flow channels are arranged in the feeding blocks 7, feeding ports are arranged on the rear side surfaces of the feeding blocks 7, and discharge ports are arranged on the top surfaces of the feeding blocks 7, the lower die feeding channel 21 is vertically arranged in the lower die body 2, the lower end of the lower die feeding channel 21 penetrates the rear of the lower die body 2 and is communicated with the discharge ports of the feeding blocks 7, and the upper end of the lower die feeding channel 21 is communicated with the bottom surface of the first buffer groove 22.

[0027] In addition, the locking screws 4 are double-row structure, the rear row of locking screws 4 is located at the rear of the upper die body 1 and corresponds to the rear side area of the first-stage buffer groove 22 of the lower die body 2, and the front row of locking screws 4 is located at the front of the upper die body 1 and corresponds to the position between the flow channel grooves 23 of the lower die body 2.

[0028] Specifically, the surface of the lower die body 2 at the front side of the second-stage buffer groove 25 is provided with a third-stage buffer groove 26 along the width direction.

[0029] Specifically, the left and right ends of the adjusting groove 24 are respectively provided with two annular sealing grooves 241, and the adjusting rod 61 is inserted and sealed through the double-layer sealing structure.

[0030] Further, the adjusting groove 24 and the adjusting rod 61 are both circular in cross section, and the adjusting groove 24 of the bottom surface of the upper die body 1 and the top surface of the lower die body 2 is semicircular, and the adjusting groove 24 of the circular cross section is formed after the upper die body 1 and the lower die body 2 are combined.

[0031] In addition, a series of heating holes 27 are arranged in the lower die body 2 along the front and rear directions, and the heating holes 27 are uniformly arranged in a row along the width direction.

[0032] The raw material enters from the feed port of the feed block 7, passes through the internal material flow channel, and then reaches the first-stage buffer groove 22 from the lower die feed channel 21. After filling the first-stage buffer groove 22, the raw material passes through a series of flow channel grooves 23 and then reaches the front adjusting groove 24. The width of the adjusting groove 24 is positioned by the adjusting rods 61 on the left and right sides. After the raw material passes through the adjusting groove 24, it reaches the front second-stage buffer groove 25, and then passes through the third-stage buffer groove 26. The left and right positions in the front extrusion channel 5 are blocked by the inner blocking piece 62, so that the speed vectors of the raw material in different width directions tend to be consistent during extrusion, thereby ensuring the extrusion quality of the raw material. During the extrusion process, the width of the product can be adjusted online. Specifically, rotating the hand wheel 67 drives the screw 64 to rotate, and then the sliding block 66 drives the adjusting rod 61 to move forward or backward, so that the inner blocking piece 62 blocks the extrusion channel 5 in the corresponding area on the front side. Unlike the past, it is not necessary to first close the extrusion production line and then replace the die head of different width, which can effectively improve the production efficiency and protect the die head.

[0033] 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 according to the technical principles of the present application to the above embodiments still belongs to the scope of the technical solutions of the present application.

Claims

1. An inside positive hot melt glue coating die characterized by; The utility model relates to a width adjustable extrusion die, including upper mould body (1), lower mould body (2) and the gasket (3) of setting between two, above-mentioned three are connected into an organic whole through locking mould screw (4), lower mould body (2) is provided with lower mould feed channel (21), lower mould body (2) top surface rear area is provided with a primary buffer groove (22) along the width direction, and the primary buffer groove (22) bottom is communicated lower mould feed channel (21), and the primary buffer groove (22) front side lower mould body (2) top surface is evenly distributed with a series of flow channel groove (23) along the width direction and is arranged in the front and back direction, and the upper mould body (1) and lower mould body (2) are located flow channel groove (23) front and are provided with the adjusting groove (24) along the width direction and are penetrated mould body, and the adjusting groove (24) both ends are provided with annular sealing groove (241), and the sealing groove (241) front side lower mould body (2) surface is provided with secondary buffer groove (25) along the width direction, and the gasket (3) is located the primary buffer groove (22) rear side area, and the upper mould body (1) and lower mould body (2) between the gasket (3) front side area form extrusion channel (5);Lower mould body (2) left and right sides are provided with inner blocking width adjustment mechanism (6), the inner blocking width adjustment mechanism (6) includes the adjustable plug-in rod (61) that can be transversely operated and stretches out and draws back, and the inner blocking piece (62) that is connected on adjustable plug-in rod (61), the adjustable plug-in rod (61) is inserted adjusting groove (24) and is sealed through the sealing element at both ends sealing groove (241), and the thickness of the inner blocking piece (62) is consistent with the thickness of extrusion channel (5), and the movement of adjustable plug-in rod (61) along the width direction makes the inner blocking piece (62) block the extrusion channel (5) of corresponding width in front end.

2. An inside positive melt glue coating die according to claim 1, wherein; The inner blocking width adjustment mechanism (6) includes the connecting frame (63) that is connected on the left and right sides of lower mould body (2), the connecting frame (63) is rotatably installed with lead screw (64) on it through bearing, the lead screw (64) both sides are fixedly connected with guide rod (65), the guide rod (65) is sleeved with sliding block (66) on it, the middle area of sliding block (66) is provided with threaded hole and is threadedly connected with lead screw (64), the sliding block (66) is connected with adjustable plug-in rod (61), the lead screw (64) outer end is connected with hand wheel (67), and rotating hand wheel (67) drives lead screw (64) to rotate, and then the sliding block (66) drives adjustable plug-in rod (61) to advance or retreat, so that the inner blocking piece (62) blocks the extrusion channel (5) of corresponding area in front side.

3. An inside positive melt glue coating die according to claim 2, wherein; The sliding block (66) side is provided with pointer (68), and the connecting frame (63) side is correspondingly connected with scale mark, and when the sliding block (66) moves forward and backward, the lower end of pointer (68) corresponds on scale mark.

4. An inside positive melt glue coating die according to claim 1 wherein; The bottom surface of the lower mold body (2) is provided with four feeding blocks (7) spaced along the width direction, the feeding blocks (7) are provided with material flow channels, the feeding port is arranged on the rear side of the feeding block (7), the discharge port is arranged on the top surface of the feeding block (7), the lower mold feeding channel (21) is vertically arranged in the lower mold body (2), the lower end of the lower mold feeding channel (21) penetrates the rear of the lower mold body (2) and communicates with the discharge port of the feeding block (7), and the upper end of the lower mold feeding channel (21) communicates with the bottom surface of the first buffer groove (22).

5. An inside positive melt glue coating die according to claim 1 wherein; The mold locking screw (4) is a front and rear double row structure, the rear row of mold locking screws (4) is located at the rear of the upper mold body (1) and corresponds to the rear side area of the first buffer groove (22) of the lower mold body (2), and the front row of mold locking screws (4) is located at the front of the upper mold body (1) and corresponds to the position between the flow channel grooves (23) of the lower mold body (2).

6. An inside positive melt glue coating die according to claim 1 wherein; The surface of the lower mold body (2) on the front side of the second buffer groove (25) is provided with a third buffer groove (26) along the width direction.

7. An inside positive melt glue coating die according to claim 1 wherein: The left and right ends of the adjusting groove (24) are respectively provided with two annular sealing grooves (241) spaced apart, and the adjusting plug rod (61) is inserted and sealed by a double-layer sealing structure.

8. An inside positive melt glue coating die according to claim 1 wherein: The adjusting groove (24) and the adjusting plug rod (61) are both circular in cross-section, wherein the adjusting groove (24) on the bottom surface of the upper mold body (1) and the top surface of the lower mold body (2) is semicircular, and the adjusting groove (24) formed after the upper mold body (1) and the lower mold body (2) are closed is circular in cross-section.

9. An inside positive melt glue coating die according to claim 1 wherein; A series of heating holes (27) are arranged in the lower mold body (2) along the front and rear directions, and the heating holes (27) are uniformly arranged in a row along the width direction.

Images