Preparation device and preparation method of degradable environment-friendly hot melt adhesive patch

Abstract

The invention relates to the technical field of hot melt adhesive preparation, and particularly discloses a preparation device and a preparation method of a degradable environment-friendly hot melt adhesive patch, the preparation device comprises a mounting mechanism, the mounting mechanism comprises a vertical frame, a first machine tool, a cutting table and a second machine tool, and a processing mechanism, and the processing mechanism comprises a second motor fixedly mounted on the peripheral side surface of a discharging bin; one end of the second motor comprises a movable shaft, a plurality of partition discharging plates are fixedly installed on the circumferential side face of the movable shaft, a discharging assembly is arranged at one end of the first machine tool, and a cooling assembly is arranged at the other end of the first machine tool. According to the device, the first machine tool provided with the discharging assembly and the cooling assembly is arranged, it can be guaranteed that all working procedures are connected smoothly, independent operation is not needed, the automation degree is high, the production efficiency is improved, the mixed raw materials can be evenly divided into a plurality of parts through the separation discharging plate, each part of raw materials is conveyed downwards according to a certain frequency, and the production efficiency is improved. And the conditions of blockage and insufficient heating caused by one-time total falling of the raw materials can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of hot melt adhesive preparation, and specifically relates to a preparation device and a preparation method of a degradable and environment-friendly hot melt adhesive patch. Background Art

[0002] Hot melt adhesive patch is a thermoplastic adhesive, usually in solid form. It is heated to melt it into liquid state, and then coated on the surface to be bonded. After cooling and solidification, it forms a strong bond. The melted hot melt adhesive can quickly bond the surfaces of different materials to form a strong bond. After cooling, it quickly turns into a solid state, which can quickly fix and bond the workpiece. Hot melt adhesive patches are widely used in industry and daily life, such as packaging and sealing, electronic product assembly, furniture manufacturing and other fields. However, it should be noted that hot melt adhesive may soften at high temperatures and become brittle at low temperatures. Therefore, the temperature range and use requirements of the application environment need to be considered when selecting and using it. Environmentally friendly hot melt adhesive refers to hot melt adhesive materials that have less impact on the environment during preparation and use. Usually, this type of adhesive uses renewable resources or degradable materials as the main ingredients to reduce negative impacts on the environment. The preparation and use of environmentally friendly hot melt adhesives not only helps to reduce environmental pollution, but also meets the requirements of modern society for sustainable development, and has gradually become a choice in various applications.

[0003] A hot melt adhesive preparation device proposed according to the patent with publication number CN 206208616 U includes a containing component and a packaging component. The containing component includes a reaction bottle, a fixing ring and a sealing ring. The reaction bottle has a hollow structure, and a reaction cavity is formed therein. An opening connected to the reaction cavity is provided at the end of the reaction bottle. The fixing ring is arranged on the reaction bottle, and the fixing ring is arranged around the edge of the opening, and the sealing ring fits the fixing ring. The packaging component includes a sealing cap, a feeding tube, a feeding plug, a stirring tube, a stirring plug, a vacuum tube, a vacuum plug, a connecting tube body, a venting tube and a venting plug. The hot melt adhesive preparation device has better sealing performance by providing a containing component and a packaging component. Compared with the traditional open design structure, it can reduce the oxidation of the adhesive liquid by oxygen;

[0004] Traditional hot melt adhesive patch preparation equipment requires the processes of feeding, mixing, heating, cutting and transferring. These processes are independent of each other and cannot be connected, resulting in poor connectivity between each preparation process, reducing work efficiency. In addition, traditional hot melt adhesive preparation equipment is prone to raw material accumulation during feeding, resulting in uneven heating.

[0005] To this end, those skilled in the art have proposed a preparation device and a preparation method of a degradable and environmentally friendly hot-melt adhesive patch to solve the problems raised by the background technology.

[0006] The above information disclosed in this background technology is only used to increase the understanding of the background technology of the present invention and therefore, it may include information that does not constitute the prior art known to ordinary technicians in this field. Summary of the invention

[0007] The object of the present invention is to provide a preparation device and a preparation method of a degradable and environmentally friendly hot melt adhesive patch to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A preparation device for a degradable and environmentally friendly hot-melt adhesive patch, comprising:

[0010] The mounting mechanism comprises a stand, a first machine tool, a cutting table and a second machine tool, the first machine tool and the second machine tool are respectively located at two ends of the cutting table, the first machine tool is provided with a first conveyor belt, the second machine tool is provided with a second conveyor belt, the stand is located on a side of the first machine tool, a preparation component is fixedly mounted at one end of the stand, the preparation component comprises a mixing bin, a material discharge bin and a heating bin, the mixing bin and the heating bin are respectively mounted at the upper and lower ends of the material discharge bin, the mixing bin and the heating bin are both connected with the material discharge bin, and a control panel is provided on the heating bin;

[0011] The processing mechanism includes a second motor fixedly mounted on the side surface of a material discharge bin, one end of the second motor includes a movable shaft, the movable shaft is located in the material discharge bin, a plurality of partition material discharge plates are fixedly mounted on the side surface of the movable shaft, a material discharge assembly is arranged at one end of the first machine tool, a cooling assembly is arranged at the other end of the first machine tool, and a cutting assembly is arranged on the cutting table.

[0012] Preferably, the unloading assembly comprises a mounting frame fixedly mounted on the first machine tool, the mounting frame is provided with an axial hole, a rotating shaft is inserted into the axial hole, and a roller is fixedly mounted on the peripheral side of the rotating shaft.

[0013] Preferably, a patch sheet coil is wound around the circumferential side of the roller, and a plurality of glue grooves are provided on the patch sheet coil.

[0014] Preferably, the cooling assembly comprises a curing chamber arranged on the first machine tool, cooling inlets are provided at both ends of the curing chamber, the patch sheet coil passes through the cooling inlets, and a cooling device is fixedly installed on the upper surface of the curing chamber.

[0015] Preferably, the cutting assembly includes a gantry fixedly mounted on the upper surface of the cutting table, a cylinder is fixedly provided on the upper surface of the gantry, the cylinder includes a lifting column, one end of the lifting column is fixedly connected to a cutting blade, a unloading table is provided on one side of the cutting table, and the unloading table is located at one end of the second machine tool.

[0016] Preferably, a feed hopper is provided on the upper surface of the mixing bin, the feed hopper is connected to the interior of the mixing bin, a plurality of first motors are fixedly installed on the peripheral side of the mixing bin, a stirring shaft is connected to the output end of the first motor, a roller is fixedly installed on the peripheral side of the stirring shaft, and a plurality of mixing rods are fixedly installed on the peripheral side of the roller.

[0017] Preferably, the lower surface of the lower silo is connected to an extrusion end head, and a ball valve is provided on the extrusion end head.

[0018] Preferably, a method for preparing a device for preparing a degradable and environmentally friendly hot melt adhesive patch comprises the following steps:

[0019] S1 Material preparation: prepare the raw materials required for the hot melt patch and the adhesive required for the reaction, screen and weigh the raw materials according to the formula, and pre-melt the adhesive;

[0020] S2 Adding and mixing: Put the prepared raw materials and binder into the mixing equipment and stir and mix them evenly;

[0021] S3 heating and melting: the mixture is sent into the reactor for heating, the heating time and heating temperature are set, and secondary mixing is performed during the heating process;

[0022] S4: Raw material extrusion: select the corresponding extruder head according to the shape and size requirements of the product, adjust the position and height of the extruder head, place the preparation patch under the extruder head, wait for the material to be discharged, set the extrusion speed, feed the melted hot melt adhesive fluid into the extruder, and then extrude the hot melt adhesive onto the preparation patch;

[0023] S5: Cooling and curing: Place the preparation patch with hot melt adhesive into the cooling device, set the cooling time and cooling temperature for curing.

[0024] Preferably, in step S1, in the material preparation operation, 30 parts of polylactic acid, 35 parts of polyhydroxyalkanoate, and 40 parts of ethylene vinyl acetate copolymer are prepared by weight, and wood fiber is used as a bio-based filler, and fatty acid resin is used as a bio-based plasticizer to adjust the melting point and fluidity, phosphate is used as a bio-based stabilizer to improve the heat resistance and oxidation resistance of the adhesive, and dihydroxyamine compounds are used as binders to combine the raw materials and maintain the integrity of the colloid structure.

[0025] Preferably, in step S3, during the heating and melting operation, the mixed hot melt adhesive raw material is transported to a heating device, the heating device is started, the heating temperature is set to 230 degrees Celsius, and the heating time is set to 25 minutes.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The present invention provides a first machine tool with a discharge component and a cooling component, winds the patch sheet coil on a roller, starts the first conveyor belt to drive the patch sheet coil for automatic transportation, pours the raw materials into the mixing bin through the feed hopper for stirring and mixing, and then enters the discharge bin after mixing. The second motor is started to drive the partition discharge plate to rotate at a uniform speed. The partition discharge plate can evenly divide the mixed raw materials into several portions, and each portion of the raw materials is conveyed downward at a certain frequency, which can avoid the raw materials from falling all at once, resulting in blockage and insufficient heating. The extrusion end of the valve squeezes the heated colloid into the glue groove. After the patch sheet roll with hot melt adhesive is moved to the curing chamber, the cooling equipment is started to cool and solidify it. Then, the patch sheet roll is transported to the cutting table, and the cylinder is started to drive the cutting blade to fall and cut it into patch fragments. The sliced ​​patch sheet roll moves along the unloading table to the second conveyor belt to wait for packaging. In this way, the entire preparation process can be realized. Each process is smoothly connected with each other, no separate operation is required, and the degree of automation is high, which improves production efficiency.

[0028] (2) The present invention uses polylactic acid, polyhydroxyalkanoates and ethylene vinyl acetate copolymers as raw materials, which have high biodegradability and can be completely decomposed by microorganisms in the natural environment and finally converted into water and carbon dioxide. In addition, these materials can be produced from renewable resources, such as vegetable oils and fats. Therefore, the dependence on limited resources can be reduced in the production process, thereby reducing the burden on the environment. At the same time, the polyhydroxyalkanoate material itself usually has low toxicity and will not release harmful substances during use and disposal. Compared with traditional plastics and chemical synthetics, polylactic acid, polyhydroxyalkanoates and ethylene vinyl acetate copolymer materials have less impact on the environment. At the same time, using wood fiber as a bio-based filler can enhance the performance of the material, reduce costs and improve the environmental impact of the material, further improving the environmental friendliness of the hot melt adhesive patch.

[0029] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a left-side stereoscopic structural schematic diagram of the present invention;

[0031] Figure 2 It is a rear-view stereoscopic structural schematic diagram of the present invention;

[0032] Figure 3 It is a right-side stereoscopic structural schematic diagram of the present invention;

[0033] Figure 4 It is a front view of the present invention;

[0034] Figure 5 This is a schematic diagram of the internal structure of the mixing bin of the present invention;

[0035] Figure 6 It is a flow chart of the preparation method of the present invention.

[0036] In the figure: 1. first machine tool; 2. first conveyor belt; 3. mounting frame; 4. roller; 5. rotating shaft; 6. vertical frame; 7. mixing bin; 8. feeding hopper; 9. first motor; 10. cooling equipment; 11. second conveyor belt; 12. second machine tool; 13. cutting table; 14. cooling inlet; 15. glue groove; 16. patch sheet coil; 17. unloading table; 18. gantry; 19. cutting blade; 20. cylinder; 21. curing bin; 22. ball valve; 23. extrusion end; 24. movable shaft; 25. partition unloading plate; 26. stirring shaft; 27. rotating roller; 28. mixing rod; 29. ​​unloading bin; 30. control panel; 31. heating bin; 32. second motor. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] See also Figure 1-Figure 5 As shown, a preparation device for a degradable and environmentally friendly hot melt adhesive patch comprises:

[0040] The installation mechanism includes a stand 6, a first machine tool 1, a cutting table 13 and a second machine tool 12. The first machine tool 1 and the second machine tool 12 are respectively located at two ends of the cutting table 13. The first machine tool 1 is provided with a first conveyor belt 2, and the second machine tool 12 is provided with a second conveyor belt 11. The stand 6 is located on one side of the first machine tool 1. A preparation component is fixedly installed at one end of the stand 6. The preparation component includes a mixing bin 7, a material discharge bin 29 and a heating bin 31. The mixing bin 7 and the heating bin 31 are respectively installed at the upper and lower ends of the material discharge bin 29. The mixing bin 7 and the heating bin 31 are both connected to the material discharge bin 29. A control panel 30 is provided on the heating bin 31;

[0041] The processing mechanism includes a second motor 32 fixedly installed on the side of the unloading bin 29, one end of the second motor 32 includes a movable shaft 24, the movable shaft 24 is located in the unloading bin 29, and a plurality of partition unloading plates 25 are fixedly installed on the side of the movable shaft 24. A discharge assembly is provided at one end of the first machine tool 1, a cooling assembly is provided at the other end of the first machine tool 1, and a cutting assembly is provided on the cutting table 13.

[0042] Specifically, the unloading assembly includes a mounting frame 3 fixedly mounted on the first machine tool 1 , the mounting frame 3 is provided with an axial hole, a rotating shaft 5 is inserted into the axial hole, and a roller 4 is fixedly mounted on the side surface of the rotating shaft 5 .

[0043] Specifically, a patch sheet coil 16 is wound around the side surface of the roller 4 , and a plurality of adhesive grooves 15 are formed on the patch sheet coil 16 .

[0044] As can be seen from the above, the present invention sets a first machine tool 1 with a discharge component and a cooling component, winds the patch sheet roll 16 on the roller 4, starts the first conveyor belt 2 to drive the patch sheet roll 16 for automatic transportation, pours the raw materials into the mixing bin 7 through the feed hopper 8 for stirring and mixing, and enters the discharge bin 29 after mixing. By starting the second motor 32, the partition discharge plate 25 is driven to rotate at a uniform speed. The partition discharge plate 25 can evenly divide the mixed raw materials into several portions, and convey each portion of raw materials downward at a certain frequency, which can avoid the raw materials from falling all at once, causing blockage and insufficient heating.

[0045] Embodiment 2:

[0046] See also Figure 1-Figure 5 As shown, the cooling assembly includes a curing chamber 21 arranged on the first machine tool 1, cooling inlets 14 are opened at both ends of the curing chamber 21, the patch sheet roll 16 passes through the cooling inlet 14, and a cooling device 10 is fixedly installed on the upper surface of the curing chamber 21.

[0047] Specifically, the cutting assembly includes a gantry 18 fixedly mounted on the upper surface of the cutting table 13, a cylinder 20 is fixedly arranged on the upper surface of the gantry 18, the cylinder 20 includes a lifting column, one end of the lifting column is fixedly connected to a cutting blade 19, a side of the cutting table 13 is provided with a unloading table 17, and the unloading table 17 is located at one end of the second machine tool 12.

[0048] Specifically, a feed hopper 8 is provided on the upper surface of the mixing bin 7, and the feed hopper 8 is connected to the inside of the mixing bin 7. A plurality of first motors 9 are fixedly installed on the side surface of the mixing bin 7. A stirring shaft 26 is connected to the output end of the first motor 9. A roller 27 is fixedly installed on the side surface of the stirring shaft 26. A plurality of mixing rods 28 are fixedly installed on the side surface of the roller 27.

[0049] Specifically, the lower surface of the lower bin 29 is connected to an extrusion end head 23 , and a ball valve 22 is provided on the extrusion end head 23 .

[0050] As can be seen from the above, the present invention extrude the colloid after heating into the glue groove 15 by setting an extrusion end 23 with a ball valve 22. After the patch sheet roll 16 attached with hot melt adhesive is moved to the curing chamber 21, the cooling device 10 is started to cool and solidify it. Then, after the patch sheet roll 16 continues to be conveyed to the cutting table 13, the cylinder 20 is started to drive the cutting blade 19 to fall and cut it into individual patch fragments. The sliced ​​patch sheet roll 16 moves along the unloading table 17 to the second conveyor belt 11 to wait for packaging. In this way, the entire preparation process can be realized, and each process is smoothly connected with each other, without the need for separate operation, and the degree of automation is high, thereby improving production efficiency.

[0051] Embodiment three:

[0052] See also Figure 6 As shown, a method for preparing a device for preparing a degradable and environmentally friendly hot melt adhesive patch comprises the following steps:

[0053] S1 Material preparation: prepare the raw materials required for the hot melt patch and the adhesive required for the reaction, screen and weigh the raw materials according to the formula, and pre-melt the adhesive;

[0054] S2 Adding and mixing: Put the prepared raw materials and binder into the mixing equipment and stir and mix them evenly;

[0055] S3 heating and melting: the mixture is sent into the reactor for heating, the heating time and heating temperature are set, and secondary mixing is performed during the heating process;

[0056] S4: Raw material extrusion: select the corresponding extruder head according to the shape and size requirements of the product, adjust the position and height of the extruder head, place the preparation patch under the extruder head, wait for the material to be discharged, set the extrusion speed, feed the melted hot melt adhesive fluid into the extruder, and then extrude the hot melt adhesive onto the preparation patch;

[0057] S5: Cooling and curing: Place the preparation patch with hot melt adhesive into the cooling device, set the cooling time and cooling temperature for curing.

[0058] Specifically, in step S1, in the material preparation operation, 20-30 parts of polylactic acid, 25-35 parts of polyhydroxyalkanoate, and 30-40 parts of ethylene vinyl acetate copolymer are prepared by weight, and wood fiber is used as a bio-based filler, fatty acid resin is used as a bio-based plasticizer to adjust the melting point and fluidity, phosphate is used as a bio-based stabilizer to improve the heat resistance and oxidation resistance of the adhesive, and dihydroxyamine compounds are used as binders to combine the raw materials and maintain the integrity of the colloid structure.

[0059] Specifically, in step S3, during the heating and melting operation, the mixed hot melt adhesive raw material is transported to a heating device, the heating device is started, the heating temperature is set to 180-230 degrees Celsius, and the heating time is set to 15-25 minutes.

[0060] As can be seen from the above, the present invention uses polylactic acid, polyhydroxyalkanoates and ethylene vinyl acetate copolymers as raw materials, which have high biodegradability and can be completely decomposed by microorganisms in the natural environment and eventually converted into water and carbon dioxide. Moreover, these materials can be produced from renewable resources, such as vegetable oils and fats. Therefore, the dependence on limited resources can be reduced in the production process, thereby reducing the burden on the environment. At the same time, the polyhydroxyalkanoate material itself usually has low toxicity and will not release harmful substances during use and disposal. Compared with traditional plastics and chemical synthetics, polylactic acid, polyhydroxyalkanoates and ethylene vinyl acetate copolymer materials have less impact on the environment. At the same time, using wood fiber as a bio-based filler can enhance the performance of the material, reduce costs and improve the environmental impact of the material, further improving the environmental friendliness of the hot melt adhesive patch.

[0061] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0062] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0066] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A preparation device for a degradable and environmentally friendly hot melt adhesive patch, characterized in that: include: A mounting mechanism, the mounting mechanism comprising a stand (6), a first machine tool (1), a cutting table (13) and a second machine tool (12), the first machine tool (1) and the second machine tool (12) being respectively located at two ends of the cutting table (13), the first machine tool (1) being provided with a first conveyor belt (2), the second machine tool (12) being provided with a second conveyor belt (11), the stand (6) being located on a side of the first machine tool (1), one end of the stand (6) being fixedly provided with a preparation component, the preparation component comprising a mixing bin (7), a material discharge bin (29) and a heating bin (31), the mixing bin (7) and the heating bin (31) being respectively provided at the upper and lower ends of the material discharge bin (29), the mixing bin (7) and the heating bin (31) being both connected to the material discharge bin (29), and the heating bin (31) being provided with a control panel (30); A processing mechanism, the processing mechanism comprising a second motor (32) fixedly mounted on a peripheral side of a material discharge bin (29), one end of the second motor (32) comprising a movable shaft (24), the movable shaft (24) being located in the material discharge bin (29), a plurality of partitioning material discharge plates (25) being fixedly mounted on the peripheral side of the movable shaft (24), a material discharge assembly being arranged at one end of the first machine tool (1), a cooling assembly being arranged at the other end of the first machine tool (1), and a cutting assembly being arranged on the cutting table (13).

2. The device for preparing a degradable and environmentally friendly hot melt adhesive patch according to claim 1, characterized in that: The unloading assembly comprises a mounting frame (3) fixedly mounted on the first machine tool (1), the mounting frame (3) being provided with an axial hole, a rotating shaft (5) being inserted into the axial hole, and a roller (4) being fixedly mounted on the peripheral side of the rotating shaft (5).

3. The preparation device of a degradable and environmentally friendly hot melt adhesive patch according to claim 2, characterized in that: A patch sheet coil (16) is wound around the circumferential side of the roller (4), and a plurality of glue grooves (15) are provided on the patch sheet coil (16).

4. The device for preparing a degradable and environment-friendly hot-melt adhesive patch according to claim 3, characterized in that: The cooling assembly comprises a curing chamber (21) arranged on a first machine tool (1), cooling inlets (14) are provided at both ends of the curing chamber (21), the patch sheet coil (16) passes through the cooling inlet (14), and a cooling device (10) is fixedly mounted on the upper surface of the curing chamber (21).

5. The device for preparing a degradable and environmentally friendly hot melt adhesive patch according to claim 1, characterized in that: The cutting assembly comprises a gantry (18) fixedly mounted on the upper surface of a cutting table (13); a cylinder (20) is fixedly arranged on the upper surface of the gantry (18); the cylinder (20) comprises a lifting column; one end of the lifting column is fixedly connected to a cutting blade (19); a material unloading table (17) is arranged on one side of the cutting table (13); the material unloading table (17) is located at one end of the second machine tool (12).

6. The device for preparing a degradable and environmentally friendly hot melt adhesive patch according to claim 1, characterized in that: A feed hopper (8) is arranged on the upper surface of the mixing bin (7), and the feed hopper (8) is communicated with the interior of the mixing bin (7). A plurality of first motors (9) are fixedly mounted on the peripheral side of the mixing bin (7), and a stirring shaft (26) is connected to the output end of the first motor (9). A roller (27) is fixedly mounted on the peripheral side of the stirring shaft (26), and a plurality of mixing rods (28) are fixedly mounted on the peripheral side of the roller (27).

7. The device for preparing a degradable and environment-friendly hot-melt adhesive patch according to claim 1, characterized in that: The lower surface of the lower material bin (29) is connected to an extrusion end head (23), and a ball valve (22) is arranged on the extrusion end head (23).

8. A method for preparing a degradable and environment-friendly hot-melt adhesive patch according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1 Material preparation: prepare the raw materials required for the hot melt patch and the adhesive required for the reaction, screen and weigh the raw materials according to the formula, and pre-melt the adhesive; S2 Adding and mixing: Put the prepared raw materials and binder into the mixing equipment and stir and mix them evenly; S3 heating and melting: the mixture is sent into the reactor for heating, the heating time and heating temperature are set, and secondary mixing is performed during the heating process; S4: Raw material extrusion: select the corresponding extruder head according to the shape and size requirements of the product, adjust the position and height of the extruder head, place the preparation patch under the extruder head, wait for the material to be discharged, set the extrusion speed, feed the melted hot melt adhesive fluid into the extruder, and then extrude the hot melt adhesive onto the preparation patch; S5: Cooling and curing: Place the preparation patch with hot melt adhesive into the cooling device, set the cooling time and cooling temperature for curing.

9. The method for preparing a degradable and environmentally friendly hot melt adhesive patch according to claim 8, characterized in that: In step S1, in the material preparation operation, 20-30 parts of polylactic acid, 25-35 parts of polyhydroxyalkanoate, and 30-40 parts of ethylene vinyl acetate copolymer are prepared by weight, and wood fiber is used as a bio-based filler, fatty acid resin is used as a bio-based plasticizer to adjust the melting point and fluidity, phosphate is used as a bio-based stabilizer to improve the heat resistance and oxidation resistance of the adhesive, and dihydroxyamine compounds are used as binders to combine the raw materials and maintain the integrity of the colloid structure.

10. The method for preparing a degradable and environmentally friendly hot melt adhesive patch according to claim 8, characterized in that: In step S3, during the heating and melting operation, the mixed hot melt adhesive raw material is transported to a heating device, the heating device is started, the heating temperature is set to 180-230 degrees Celsius, and the heating time is set to 15-25 minutes.

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