PUR glue machine for plate edge banding machine

Abstract

The utility model discloses a kind of PUR glue machines for plate edge banding machine, it includes: glue bucket assembly and extrusion component, glue bucket assembly includes glue bucket and base, the bottom of glue bucket and the top of base are detachably fixed connection, several heating rods are installed in the barrel wall of glue bucket, the middle part of base is equipped with glue outlet, extrusion component includes extrusion cylinder and first mounting plate, the middle part of first mounting plate is equipped with first opening, first mounting plate on the two sides of first opening is respectively fixedly installed first stand and second stand, the top end of first stand is rotatably installed second mounting plate, second mounting plate and second stand are detachably fixed connection, extrusion cylinder is fixedly installed in the top of second mounting plate, the top surface of extrusion plate and extrusion cylinder telescopic end are fixedly connected, extrusion plate is cylindrical, extrusion plate and glue bucket are coaxially arranged and are slidably sealedly connected with the inner wall of glue bucket。The utility model has high hot melting efficiency, glue supply speed is stable, can ensure product quality, it is more convenient when supplement hot melt adhesive.

Description

Technical Field

[0001] This utility model relates to the field of woodworking machinery and equipment technology, and in particular to a PUR glue applicator for a board edge banding machine. Background Technology

[0002] In the furniture manufacturing industry, most products use wood panels or compressed boards. To achieve a refined and aesthetically pleasing finish, the edges of the panels need to be sealed after processing to conceal the internal structure and achieve a beautiful, dust-proof, and moisture-proof effect. An edge banding machine is a mechanical device that performs edge banding on the panels, automating the traditional manual edge banding process. It is widely used in furniture manufacturing, interior decoration, and wooden door manufacturing industries. An edge banding machine typically includes processes such as gluing, edge banding, trimming, edge finishing, and polishing. The panels are conveyed by a conveyor belt and pass through all these processes in one go, ultimately completing the edge banding.

[0003] The adhesive used in the edge banding machine is hot melt adhesive. During the adhesive application process, a glue applicator is used to supply adhesive to the edge banding machine. However, the existing glue applicator has low hot melt efficiency, unstable glue supply speed, and is inconvenient to operate when replenishing hot melt adhesive. Utility Model Content

[0004] The purpose of this utility model is to provide a PUR glue applicator for edge banding machines of sheet metal, which has high hot melt efficiency, stable glue supply speed, can ensure product quality, and is also convenient to replenish hot melt glue.

[0005] To achieve the above and other related objectives, this utility model provides a PUR glue applicator for a sheet metal edge banding machine, comprising: a glue tank assembly and an extrusion assembly. The glue tank assembly includes a glue tank and a base. The bottom of the glue tank is detachably and fixedly connected to the top of the base. Four to ten first heating rod holes are evenly distributed radially within the wall of the glue tank. The first heating rod holes extend axially from the bottom to the top of the glue tank. The base is provided with a number of second heating rod holes equal to and corresponding to the number of the first heating rod holes. Each first heating rod hole corresponds to a second heating rod hole. A heating rod is inserted and fixedly installed inside the heating rod hole. A glue outlet is provided in the middle of the base, and several first connecting holes are provided on the bottom surface of the base surrounding the glue outlet. The extrusion assembly includes an extrusion cylinder and a first mounting plate. A first opening is provided in the middle of the first mounting plate, which mates with the top opening of the glue bucket. The first mounting plate surrounding the first opening is fixedly connected to the top of the glue bucket. A first column and a second column are respectively fixedly installed on the first mounting plate on both sides of the first opening. The second mounting plate is rotatably installed on the top of the first column. The second mounting plate is detachably and fixedly connected to the second column at the end away from the first column. The extrusion cylinder is fixedly installed on the top of the second mounting plate. The telescopic end of the extrusion cylinder passes through the second mounting plate and is fixedly connected to the top surface of the extrusion plate. The extrusion plate is cylindrical and is coaxially arranged with the glue bucket. It slides and is sealed to the inner wall of the glue bucket. The extrusion plate is provided with an exhaust hole. An air release bolt is inserted and fixedly installed in the exhaust hole. An air release shaft is inserted and installed in the air release bolt. The air release shaft passes through the second mounting plate and is slidably connected to the second mounting plate. The top surface of the extrusion plate is vertically and fixedly connected to the bottom end of the limiting shaft. The limiting shaft passes through the second mounting plate and is slidably connected to the second mounting plate. A first limit sensor is installed on the cylinder body of the extrusion cylinder. The first limit sensor cooperates with a second limit sensor on the top of the limiting shaft. The first limit sensor, the second limit sensor, and the switch of the extrusion cylinder are electrically connected to the controller. A first connecting plate is vertically and fixedly installed on one side of the top surface of the first mounting plate. The first connecting plate is provided with several second connecting holes.

[0006] In one example of the PUR glue applicator for the edge banding machine of this utility model, a plurality of first countersunk holes are evenly distributed on the bottom edge of the base, and a plurality of first threaded holes are evenly distributed on the bottom surface of the glue bucket. The plurality of first countersunk holes respectively mate with the plurality of first threaded holes and are fixedly connected by first bolts.

[0007] In one example of the PUR glue applicator for the edge banding machine of this utility model, the bottom surface of the glue bucket is provided with an annular first protrusion, and the top surface of the base is provided with an annular first groove. The first protrusion and the first groove are fitted together and sealed. A plurality of first threaded holes and first heating rod holes are located on the bottom surface of the glue bucket around the first protrusion, and a plurality of first countersunk holes and second heating rod holes are located on the base around the first groove.

[0008] In one example of the PUR glue applicator for the edge banding machine of this utility model, the top surface of the glue bucket is provided with an annular second protrusion. The second protrusion is engaged with the first opening. A plurality of second threaded holes are evenly distributed on the top surface of the glue bucket around the second protrusion. A plurality of second fixing holes are evenly distributed on the first mounting plate around the first opening. The plurality of second fixing holes are engaged with the plurality of second threaded holes and are fixedly connected by second bolts.

[0009] In one example of the PUR glue applicator for the edge banding machine of this utility model, a heating rod fixing plate is rotatably installed on the bottom surface of the base around each second heating rod hole. Each heating rod fixing plate is provided with a first slot, which engages with the bottom end of the heating rod.

[0010] In one example of the PUR glue applicator for the edge banding machine of this utility model, the second mounting plate is provided with a second slot at the end away from the first column. The second slot engages with the top of the second column. The top of the second column is threaded with a fastening bolt, which engages with the second mounting plate.

[0011] In one example of the PUR glue applicator for the edge banding machine of this utility model, two sealing rings are fixedly installed on the top and bottom of the side wall of the extrusion plate, and the two sealing rings are sealed to the inner wall of the glue bucket.

[0012] In one example of the PUR glue applicator for the edge banding machine of this utility model, a linear bearing is installed and fixedly mounted on the second mounting plate around the extrusion cylinder, and the limiting shaft is slidably connected to the linear bearing.

[0013] In one example of the PUR glue applicator for the edge banding machine of this utility model, the top of the venting shaft is rotatably mounted with an operating handle.

[0014] In one example of the PUR glue applicator for the edge banding machine of this utility model, the edge of the bottom surface of the first mounting plate is fixedly connected to the top surface of the protective cover. The protective cover is located around the glue tank assembly. The protective cover has several heat dissipation holes and warning signs on the side away from the first connecting plate. The protective cover has a second opening on the side facing the first connecting plate. The bottom surface of the protective cover has a U-shaped opening that matches the glue outlet.

[0015] This utility model relates to a board edge banding machine using a PUR glue applicator. The machine is connected to the board edge banding machine via a first connecting plate on a first mounting plate using bolts and nuts. Several first connecting holes around the glue outlet allow the hot melt adhesive delivery pipe to be fixed to the bottom of the base, completing the installation of the glue applicator. A glue bucket assembly is used to melt and store the hot melt adhesive. The hot melt adhesive is added to the glue bucket through an opening at the top. Several heating rods inside the bucket wall heat the bucket and the hot melt adhesive, causing it to melt. An extrusion assembly is used to extrude the hot melt adhesive from the glue bucket through the glue outlet into the delivery pipe. Controlling the extension and retraction of the extrusion cylinder moves the extrusion plate into the glue bucket, applying pressure to the hot melt adhesive and forcing it out of the glue outlet into the delivery pipe. The extrusion cylinder can be controlled by adjusting the air pressure. The telescopic end drives the extrusion plate to move at a constant speed, thus ensuring a relatively stable glue supply speed. The cooperation of the venting bolt and venting shaft maintains a certain pressure inside the glue tank and prevents safety issues caused by excessive pressure. When the extrusion plate reaches the bottom of the glue tank, the limiting shaft moves to its lowest position along with the extrusion plate. At this time, the second limiting sensor at the top of the limiting shaft moves to the first limiting sensor and triggers it. The controller then controls the extrusion cylinder to adjust to the retracted position. The telescopic end of the extrusion cylinder drives the extrusion plate to rise and disengage from the glue tank, releasing the fixed connection between the second mounting plate and the second column. This allows the second mounting plate to rotate around the first column, exposing the top opening of the glue tank and completing the replenishment of hot melt glue. The second mounting plate is then rotated back to its original position and fixedly connected to the second column, ready for the next glue supply. This invention features high hot melt efficiency, stable glue supply speed, ensures good product quality, and is convenient for replenishing hot melt glue. Attached Figure Description

[0016] Figure 1 This is a perspective view of an embodiment of the PUR glue applicator for the edge banding machine of this utility model; Figure 2 This is a schematic diagram of the PUR glue applicator for the edge banding machine of this utility model without the protective cover; Figure 3 This is a top view of an embodiment of the PUR glue applicator for the edge banding machine of this utility model; Figure 4 This is a schematic diagram of the glue bucket assembly in one embodiment of the PUR glue applicator for the edge banding machine of this utility model; Figure 5 This is a schematic diagram of the glue bucket structure in one embodiment of the PUR glue applicator for the edge banding machine of this utility model; Figure 6 This is a schematic diagram of the base structure in one embodiment of the PUR glue applicator for the edge banding machine of this utility model; Figure 7 This is a bottom view of the glue bucket assembly in one embodiment of the PUR glue applicator for the edge banding machine of this utility model; Figure 8 This is a schematic diagram of the extrusion assembly in one embodiment of the PUR glue applicator for the edge banding machine of this utility model; Figure 9 This is a cross-sectional view of the venting bolt and venting shaft in one embodiment of the PUR glue applicator for the edge banding machine of this utility model. Figure 10 This is a schematic diagram of the protective cover in one embodiment of the PUR glue applicator for the edge banding machine of this utility model.

[0017] Component designation: 100 Glue bucket assembly; 110 Glue bucket; 111 First heating rod hole; 112 First threaded hole; 113 First boss; 114 Second boss; 115 Second threaded hole; 120 Base; 121 Second heating rod hole; 122 Glue outlet; 123 First connecting hole; 124 First countersunk hole; 125 First groove; 126 Heating rod fixing plate; 130 Heating rod; 200 Extrusion assembly; 210 Extrusion cylinder; 220 First mounting plate; 221 First opening; 222 First connecting plate; 223 Second fixing hole; 230 First column; 240 Second column; 241 Fastening bolt; 250 Second mounting plate; 251 Second slot; 252 Linear bearing; 260 Extrusion plate; 261 Vent bolt; 262 Vent shaft; 263 Limit shaft; 264 Sealing ring; 265 Operating handle; 270 First limit sensor; 271 Second limit sensor; 300 Protective cover; 310 Heat dissipation hole; 320 Warning sign; 400 First bolt. Detailed Implementation

[0018] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0019] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, equipment, and materials similar to or equivalent to those in the embodiments of this invention.

[0020] Please see Figures 1 to 10This utility model provides a PUR glue applicator for a sheet metal edge banding machine, comprising: a glue tank assembly 100 and an extrusion assembly 200. The glue tank assembly 100 includes a glue tank 110 and a base 120. The bottom of the glue tank 110 is detachably and fixedly connected to the top of the base 120. 4 to 10 first heating rod holes 111 are evenly distributed radially along the inner wall of the glue tank 110. The first heating rod holes 111 extend axially from the bottom to the top of the glue tank 110. The base 120 is provided with second heating rod holes 121 in the same number and matching the first heating rod holes 111. A heating rod 130 is inserted and fixedly installed in each of the first heating rod holes 111 and the second heating rod holes 121. A glue outlet 122 is provided in the middle of the base 120. A plurality of first connecting holes 123 are provided on the bottom surface of the base 120 surrounding the glue outlet 122. The extrusion assembly 200 includes an extrusion cylinder 210 and a first mounting plate 220. The first mounting plate 220 has a first opening 221 in its center, which mates with the top opening of the glue tank 110. The first mounting plate 220 surrounding the first opening 221 is fixedly connected to the top of the glue tank 110. A first column 230 and a second column 240 are fixedly mounted on the first mounting plates 220 on both sides of the first opening 221, respectively. A second mounting plate 250 is rotatably mounted on the top of the first column 230. The end of the second mounting plate 250 away from the first column 230 is detachably fixedly connected to the second column 240. The extrusion cylinder 210 is fixedly mounted on the top of the second mounting plate 250. The telescopic end of the extrusion cylinder 210 passes through the second mounting plate 250 and is fixedly connected to the top surface of an extrusion plate 260. The extrusion plate 260 is cylindrical and coaxially arranged with the glue tank 110. The extrusion plate 260 is provided with an exhaust hole, and an air release bolt 261 is installed and fixedly installed in the exhaust hole. An air release shaft 262 is installed and installed in the air release bolt 261. The air release shaft 262 is installed on the second mounting plate 250 and is slidably connected to the second mounting plate 250. The top surface of the extrusion plate 260 is vertically fixedly connected to the bottom end of the limiting shaft 263. The limiting shaft 263 is installed on the second mounting plate 250 and is slidably connected to the second mounting plate 250. A first limiting sensor 270 is installed on the cylinder body of the extrusion cylinder 210. The first limiting sensor 270 cooperates with the second limiting sensor 271 at the top of the limiting shaft 263. The first limiting sensor 270, the second limiting sensor 271 and the switch of the extrusion cylinder 210 are electrically connected to the controller. A first connecting plate 222 is vertically fixedly installed on one side of the top surface of the first mounting plate 220. The first connecting plate 222 is provided with several second connecting holes.

[0021] This utility model connects the first connecting plate 222 on the first mounting plate 220 to the board edge banding machine via bolts and nuts. The hot melt adhesive delivery pipe can be fixed to the bottom of the base 120 via several first connecting holes 123 around the glue outlet 122, thus completing the installation of the glue applicator. The glue bucket assembly 100 is used to melt and store the hot melt adhesive. The hot melt adhesive is added into the glue bucket 110 through the opening at the top. Several heating rods 130 inside the bucket wall heat the glue bucket 110 and the hot melt adhesive, causing the hot melt adhesive to melt. The extrusion assembly 200 is used to extrude the hot melt adhesive in the glue bucket 110 from the glue outlet 122 into the delivery pipe. The extension and retraction end of the extrusion cylinder 210 is controlled to move the extrusion plate 260 into the glue bucket 110, applying pressure to the hot melt adhesive in the glue bucket 110 using the extrusion plate 260, thereby extruding the hot melt adhesive from the glue outlet 122 into the delivery pipe. By adjusting the air pressure, the extension and retraction end of the extrusion cylinder 210 can be controlled to drive the extrusion plate 260 to move at a uniform speed, thereby making the glue supply speed more stable. Through the cooperation of the vent bolt 261 and the vent shaft 262, a certain pressure can be maintained inside the glue tank 110 and the safety problems caused by excessive pressure can be avoided. When the extrusion plate 260 reaches the bottom of the glue tank 110, the limiting shaft 263 moves to the lowest position along with the extrusion plate 260. At this time, the second limiting sensor 271 at the top of the limiting shaft 263 moves to the first limiting sensor 270 and triggers the first limiting sensor 270. After receiving the electrical signal uploaded by the limiting sensor, the controller controls the extrusion cylinder 210 to adjust to the retracted position. The extension end of the extrusion cylinder 210 drives the extrusion plate 260 to rise and disengage from the glue tank 110. Then, the fixed connection between the second mounting plate 250 and the second column 240 is released, and the second mounting plate 250 is rotated around the first column 230 to expose the top opening of the glue tank 110 and complete the replenishment of hot melt glue. Then, the second mounting plate 250 is rotated back to its original position and fixedly connected to the second column 240, ready for the next glue supply. The first limit sensor 270 and the second limit sensor 271 can use devices such as laser generators and laser receivers, magnetic switches and magnetic rings, or trigger-type limit switches. These devices are all conventional devices that can be purchased from the market, and their working principles will not be described in detail here.

[0022] Please see Figures 4 to 7In one example of the PUR glue applicator for the edge banding machine of this utility model, a plurality of first countersunk holes 124 are evenly distributed on the bottom edge of the base 120, and a plurality of first threaded holes 112 are evenly distributed on the bottom surface of the glue tank 110. The plurality of first countersunk holes 124 respectively mate with the plurality of first threaded holes 112 and are fixedly connected by first bolts 400. An annular first boss 113 is provided on the bottom surface of the glue tank 110, and an annular first groove 125 is provided on the top surface of the base 120. The first boss 113 and the first groove 125 are sealed together. A plurality of first threaded holes 112 and first heating rod holes 111 are located on the bottom surface of the glue tank 110 around the first boss 113, and a plurality of first countersunk holes 124 and second heating rod holes 121 are located on the base 120 around the first groove 125.

[0023] Please see Figures 4 to 7 In one example of the PUR glue applicator for the edge banding machine of this utility model, the top surface of the glue bucket 110 is provided with an annular second protrusion 114. The second protrusion 114 is engaged with the first opening 221. A plurality of second threaded holes 115 are evenly distributed on the top surface of the glue bucket 110 around the second protrusion 114. A plurality of second fixing holes 223 are evenly distributed on the first mounting plate 220 around the first opening 221. The plurality of second fixing holes 223 are respectively engaged with the plurality of second threaded holes 115 and are fixedly connected by second bolts.

[0024] Please see Figure 7 and Figure 8 In one example of the PUR glue applicator for the edge banding machine of this utility model, a heating rod fixing plate 126 is rotatably mounted on the bottom surface of the base 120 surrounding each second heating rod hole 121. Each heating rod fixing plate 126 is provided with a first slot, which engages with the bottom end of the heating rod 130. The second mounting plate 250 has a second slot 251 at the end away from the first column 230. The second slot 251 engages with the top end of the second column 240. The top end of the second column 240 is threaded with a fastening bolt 241, which engages with the second mounting plate 250. Tightening the fastening bolt 241 fixes the second mounting plate 250 to the top end of the second column 240. Loosening the fastening bolt 241 allows the second mounting plate 250 to rotate around the first column 230.

[0025] Please see Figure 2 and Figure 8In one example of the PUR glue applicator for the edge banding machine of this utility model, two sealing rings 264 are fixedly installed on the top and bottom of the side wall of the extrusion plate 260, and the two sealing rings 264 are sealed to the inner wall of the glue tank 110. A linear bearing 252 is passed through and fixedly installed on the second mounting plate 250 around the extrusion cylinder 210, and the limiting shaft 263 is slidably connected to the linear bearing 252. An operating handle 265 is rotatably installed on the top end of the venting shaft 262.

[0026] Please see Figure 1 and Figure 10 In one example of the PUR glue applicator for the edge banding machine of this utility model, the edge of the bottom surface of the first mounting plate 220 is fixedly connected to the top surface of the protective cover 300. The protective cover 300 is located around the glue bucket assembly 100. The protective cover 300 is provided with a plurality of heat dissipation holes 310 and warning signs 320 on the side away from the first connecting plate 222. The protective cover 300 is provided with a second opening on the side facing the first connecting plate 222. The bottom surface of the protective cover 300 is provided with a U-shaped opening, which cooperates with the glue outlet 122.

[0027] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A PUR glue applicator for edge banding of sheet materials, characterized in that, include: A glue bucket assembly includes a glue bucket and a base. The bottom of the glue bucket is detachably and fixedly connected to the top of the base. Four to ten first heating rod holes are evenly distributed radially within the wall of the glue bucket. The first heating rod holes extend axially from the bottom to the top of the glue bucket. The base has a number of second heating rod holes that match and cooperate with the first heating rod holes. A heating rod is inserted and fixedly installed in each of the first and second heating rod holes. A glue outlet is provided in the middle of the base, and several first connecting holes are provided on the bottom surface of the base surrounding the glue outlet. An extrusion assembly includes an extrusion cylinder and a first mounting plate. The first mounting plate has a first opening in its center, which mates with the top opening of a glue bucket. The first mounting plate surrounding the first opening is fixedly connected to the top of the glue bucket. A first column and a second column are respectively fixedly mounted on the first mounting plate on both sides of the first opening. A second mounting plate is rotatably mounted on the top of the first column. The end of the second mounting plate away from the first column is detachably fixedly connected to the second column. The extrusion cylinder is fixedly mounted on the top of the second mounting plate. The telescopic end of the extrusion cylinder passes through the second mounting plate and is fixedly connected to the top surface of the extrusion plate. The extrusion plate is cylindrical and coaxially arranged with the glue bucket, slidingly engaging with the inner wall of the glue bucket. The compression cylinder is dynamically and sealed. The compression plate has an exhaust hole, through which a venting bolt is inserted and fixedly installed. A venting shaft is inserted and installed within the venting bolt. The venting shaft passes through and slides on the second mounting plate. The top surface of the compression plate is vertically and fixedly connected to the bottom end of the limiting shaft. The limiting shaft passes through and slides on the second mounting plate. A first limiting sensor is installed on the cylinder body of the compression cylinder. The first limiting sensor cooperates with a second limiting sensor at the top of the limiting shaft. The first limiting sensor, the second limiting sensor, and the switch of the compression cylinder are electrically connected to a controller. A first connecting plate is vertically and fixedly installed on one side of the top surface of the first mounting plate. The first connecting plate has several second connecting holes.

2. The PUR glue applicator for the edge banding machine of the sheet metal as described in claim 1, characterized in that, The base has a plurality of first countersunk holes evenly distributed along its bottom edge, and the glue bucket has a plurality of first threaded holes evenly distributed along its bottom surface. The plurality of first countersunk holes respectively mate with the plurality of first threaded holes and are fixedly connected by first bolts.

3. The PUR glue applicator for the edge banding machine of the board as described in claim 2, characterized in that, The bottom surface of the glue bucket is provided with an annular first protrusion, and the top surface of the base is provided with an annular first groove. The first protrusion and the first groove are fitted together and sealed. A plurality of first threaded holes and first heating rod holes are located on the bottom surface of the glue bucket around the first protrusion, and a plurality of first countersunk holes and second heating rod holes are located on the base around the first groove.

4. The PUR glue applicator for the edge banding machine of the sheet metal as described in claim 3, characterized in that, The top surface of the glue bucket is provided with an annular second protrusion, which is inserted into the first opening. A plurality of second threaded holes are evenly distributed on the top surface of the glue bucket around the second protrusion. A plurality of second fixing holes are evenly distributed on the first mounting plate around the first opening. The plurality of second fixing holes are respectively engaged with the plurality of second threaded holes and are fixedly connected by second bolts.

5. The PUR glue applicator for the edge banding machine of the sheet metal as described in claim 1, characterized in that, A heating rod fixing plate is rotatably mounted on the bottom surface of the base surrounding each of the second heating rod holes. Each heating rod fixing plate is provided with a first slot, which engages with the bottom end of the heating rod.

6. The PUR glue applicator for the edge banding machine of the sheet metal as described in claim 1, characterized in that, The second mounting plate has a second slot at the end away from the first column. The second slot engages with the top of the second column. The top of the second column is threaded with a fastening bolt, which engages with the second mounting plate.

7. The PUR glue applicator for the edge banding machine of the sheet metal as described in claim 1, characterized in that, Two sealing rings are fixedly installed at the top and bottom of the side wall of the extrusion plate, and the two sealing rings are sealed to the inner wall of the glue bucket.

8. The PUR glue applicator for the edge banding machine of the sheet metal as described in claim 1, characterized in that, A linear bearing is mounted and fixedly installed on the second mounting plate around the extrusion cylinder, and the limiting shaft is slidably connected to the linear bearing.

9. The PUR glue applicator for the edge banding machine of the sheet metal as described in claim 1, characterized in that, An operating handle is rotatably mounted on the top of the venting shaft.

10. The PUR glue applicator for the edge banding machine of the sheet metal as described in claim 1, characterized in that, The edge of the bottom surface of the first mounting plate is fixedly connected to the top surface of the protective cover. The protective cover is located around the glue bucket assembly. The protective cover has several heat dissipation holes and warning signs on the side away from the first connecting plate. The protective cover has a second opening on the side facing the first connecting plate. The bottom surface of the protective cover has a U-shaped opening that matches the glue outlet.

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