A fully biodegradable mulch modified material blending device and method

Abstract

The present invention discloses a fully biodegradable mulch film modified material blending device and method, belonging to the field of blending technology, including a blending chamber, a heating and mixing chamber top provided with an openable cover plate, and a wind drum feeding chamber including an extrusion conveying member opened inside and connected to the heating and mixing chamber and a plurality of ingredient processing members arranged outside. The present invention is designed to address the situation that during the blending process of degradable mulch film modified materials, continuous heating and stirring of additives affected by temperature will cause poor degradation effect of the finished mulch film. The additives and degradable particles are ground and hot-melt treated respectively, and during the conveying process, the powdered additives are evenly mixed with the hot-melt degradable material by high-pressure gas, so that they are evenly adhered to the surface, shortening the later stirring time, thereby reducing the mixing time of the additives and the material, reducing the influence of temperature on the additives, and ensuring the quality of the formed mulch film.

Description

Technical Field

[0001] The invention relates to the technical field of blending, and in particular to a fully biodegradable mulch film modified material blending device and method. Background Art

[0002] Biodegradable mulch is a new type of mulch that can be biodegraded and will not cause soil pollution. After bacteria, fungi, actinomycetes and other microorganisms erode plastic films, the polymer components are hydrolyzed, ionized or protonated due to cell growth, mechanically destroyed, and split into oligomer fragments. The enzymes secreted by fungi or bacteria decompose or oxidize water-soluble polymers into water-soluble fragments, generating new small molecular compounds, until they are finally decomposed into CO2 and H2O.

[0003] Compared with traditional compound mulch, biodegradable mulch requires more raw materials. It is mainly made by blowing film through materials such as PBAT degradation mixed particles, calcium carbonate, compatibilizer, ultraviolet absorber, dispersant and composite antioxidant. The existing mixing device puts the raw materials into the mixer according to the proportion, and then melts the PBAT degradation mixed particles through high temperature to achieve the mixing of the raw materials. This can reduce the high temperature resistant materials in the raw materials of the mulch. The granular materials that are in the molten state for a long time will deteriorate, which will reduce the effect of the additives and affect the subsequent film-making effect. In addition, some additives such as calcium carbonate are insoluble in the hot-melt mixed particles. If the calcium carbonate powder particles are large, it is extremely difficult to mix evenly, which affects the subsequent degradation effect. Based on this, a fully biodegradable mulch modified material blending device and method are proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that some materials that are not resistant to high temperatures in the raw materials of the mulch film may deteriorate if they are in the molten state for a long time, thereby reducing the effect of their additives and affecting the subsequent film-making effect. A fully biodegradable mulch film modified material blending device and method are proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A fully biodegradable mulch modified material blending device and method thereof, comprising a blending chamber, wherein the blending chamber is composed of an upper heating mixing chamber, a middle air-drum feeding chamber and a lower uniform mixing chamber;

[0007] The top of the heating and mixing chamber is provided with an openable cover plate, a mixing motor is provided on the cover plate, and a heating and stirring blade is installed at the output end of the mixing motor;

[0008] The air blast feeding chamber includes an extrusion conveying member opened inside and connected to the heating mixing chamber, and a plurality of ingredient processing members arranged outside;

[0009] The extrusion conveyor comprises a plurality of feeding chambers opened on the outer wall of the heating and mixing chamber, the side wall of the feeding chamber is provided with a feeding channel connected to the heating and mixing chamber and a discharging channel connected to the uniform mixing chamber, and the feeding channel and the discharging channel are both provided with extrusion members;

[0010] The batching processing part includes a grinding seat, an end cover is rotatably arranged above the grinding seat, a grinding ball is connected to the inside of the end cover through a fixed column, a driving motor is arranged on the outer wall of the air drum feeding chamber, and the driving motor controls the grinding seat to rotate through a joint control transmission member, and a pneumatic conveying seat is arranged at the bottom of the grinding seat, and the pneumatic conveying seat is connected to a spray cover body connected to the feeding chamber through a pneumatic high-pressure spray device;

[0011] The uniform mixing chamber is provided with a mixing and stirring blade driven by a mixing motor, and one side of the uniform mixing chamber is provided with an extrusion pipeline for discharging materials.

[0012] Preferably, a centralized discharge port is provided at the bottom of the heating and mixing chamber, a plurality of the feed channels are connected to the centralized discharge port, and an electric gate is provided at the centralized discharge port.

[0013] Preferably, the extrusion component includes spiral extrusion blades and a conveying shaft, a conveying motor is arranged at the bottom of the air blower feeding chamber, two transmission chambers are opened inside the air blower feeding chamber, the end of the conveying shaft passes through the transmission chamber and is fixedly connected with a bevel gear, and the output end of the conveying motor passes through the transmission chamber and is fixedly connected with a bevel gear plate meshing with multiple bevel gears.

[0014] Preferably, the end cover is connected to the side wall of the blending chamber through a connecting block, the grinding seat is connected to the side wall of the blending chamber through a bearing seat, a grinding opening is provided in the grinding seat, and the grinding ball is located in the grinding opening.

[0015] Preferably, the linkage transmission member includes a transmission gear ring rotatably arranged on the side wall of the mixing chamber, the outer wall of the grinding seat is fixedly connected with a rotating gear meshing with the transmission gear ring, and the output end of the drive motor is fixedly connected with a driving gear meshing with the transmission gear ring.

[0016] Preferably, the pneumatic high-pressure injection device includes a pneumatic valve connected to the high-pressure generator, the pneumatic valve is connected to the end cover through a low-pressure supply pipeline, and is connected to the pneumatic conveying seat through a high-pressure supply pipeline, and the grinding ball is provided with a supply channel connected to the low-pressure supply pipeline.

[0017] Preferably, an injection port connected to the injection hood is provided in the pneumatic conveying seat, a vertical storage port connected to the injection port is provided at the bottom of the grinding port, a pneumatic cavity is provided at the other end of the injection port, the inner wall of the pneumatic cavity is connected to a pneumatic piston via a reset spring, the pneumatic piston is connected to an inner tube body via a connecting ring, the inner tube body is located in the injection port, and a matching opening matched with the vertical storage port is provided on it.

[0018] A blending method comprising the following steps:

[0019] S1. Hot melting of degradable particles: Mix various degradable particles and heat-resistant powder additives in a heating mixing chamber and heat continuously during the mixing process to form a hot-melt mulch colloid;

[0020] S2. Additive grinding: Put the additive into the grinding port of the grinding seat, and the grinding ball grinds the additive into powder through the continuous rotation of the grinding seat;

[0021] S3. Evenly mix the additives: The powdered additives are delivered to the injection port through the low-pressure feed pipeline, and the powdered additives are quickly injected into the feeding cavity under the action of the high-pressure air supply pipeline to inject and mix the hot-melt mulch colloid delivered by the extruder;

[0022] S4, stirring, mixing and discharging: the raw materials adhered and mixed with additives are transported to the uniform mixing chamber through the discharging channel, and are quickly mixed and uniformed in the uniform mixing chamber.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] This solution is designed to address the situation in which, during the blending process of degradable mulch modified materials, continuous heating and stirring of additives affected by temperature will result in poor degradation of the finished mulch. The additives and degradable particles are ground and hot-melt treated separately, and during the transportation process, the powdered additives are evenly mixed with the hot-melt degradable material through high-pressure gas to make them adhere evenly to the surface, shortening the subsequent stirring time, thereby reducing the mixing time of the additives and the material, reducing the influence of temperature on the additives, and ensuring the quality of the formed mulch.

[0025] This solution achieves grinding of additive materials by setting up a grinding seat and grinding balls, through the high-speed rotation of the grinding seat, so that the additives can be powdered and evenly dispersed and transported to the hot melt through high-pressure gas, which significantly improves the mixing effect of the additives of the insoluble materials and ensures the degradation effect of the later mulch film. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the assembly structure of a fully biodegradable mulch film modified material blending device proposed by the present invention;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of a fully biodegradable mulch film modified material blending device proposed by the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the interior of the air drum feeding chamber in a fully biodegradable mulch film modified material blending device proposed by the present invention;

[0029] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0030] Figure 5 This is a schematic diagram of the assembly structure of a pneumatic high-pressure injection device in a fully biodegradable mulch film modified material blending device proposed by the present invention;

[0031] Figure 6 This is a schematic cross-sectional structure diagram of a pneumatic high-pressure injection device in a fully biodegradable mulch film modified material blending device proposed by the present invention;

[0032] Figure 7 This is a schematic cross-sectional structure diagram of an air-drum feeding chamber in a fully biodegradable mulch film modified material blending device proposed by the present invention;

[0033] Figure 8 for Figure 7 Schematic diagram of the enlarged structure at point B in the middle.

[0034] In the figure: 1. heating and mixing chamber; 2. air blast feeding chamber; 3. uniform mixing chamber; 4. cover plate; 5. mixing motor; 6. heating and stirring blades; 7. feeding chamber; 8. feeding channel; 9. discharging channel; 10. grinding seat; 11. end cover; 12. grinding ball; 13. driving motor; 14. pneumatic conveying seat; 15. injection cover; 16. mixing and stirring blades; 17. centralized discharging port; 18. electric gate; 19. spiral extrusion blade; 20. conveying shaft; 21. conveying motor; 22. bevel gear; 23. bevel gear disc; 24. connecting block; 25. grinding port; 26. transmission gear ring; 27. rotating gear; 28. pneumatic valve; 29. ​​high-pressure air supply pipeline; 30. low-pressure supply pipeline; 31. injection port; 32. vertical storage port; 33. pneumatic piston; 34. inner tube body; 35. matching opening. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] Example, see Figure 1-Figure 8 , a fully biodegradable mulch modified material blending device and method thereof, comprising a blending chamber, the blending chamber consisting of an upper heating mixing chamber 1, a middle air-drum feeding chamber 2 and a lower uniform mixing chamber 3;

[0037] An openable cover plate 4 is provided on the top of the heating and mixing chamber 1, a mixing motor 5 is provided on the cover plate 4, and a heating and stirring blade 6 is installed at the output end of the mixing motor 5;

[0038] The heating and mixing chamber 1 is provided with a heating layer for heating the material, and the heating and stirring blades 6 mix the degradable granular material to ensure the dissolution of the degradable granular material;

[0039] Furthermore, a centralized discharge port 17 is provided at the bottom of the heating and mixing chamber 1, and a plurality of feed channels 8 are connected to the centralized discharge port 17, and an electric gate 18 is provided at the centralized discharge port 17;

[0040] It should be noted that the centralized discharge port 17 is arranged in an inverted funnel shape, and the feed channels 8 are evenly distributed around, which can ensure that the stirred hot-melt mulch colloid is evenly distributed to the feed channels 8 around as much as possible;

[0041] The air blast feeding chamber 2 includes an extrusion conveying component opened inside and connected to the heating mixing chamber 1 and a plurality of ingredient processing components arranged outside;

[0042] The extrusion conveyor comprises a plurality of feeding chambers 7 provided on the outer wall of the heating and mixing chamber 1, and the side wall of the feeding chamber 7 is provided with a feeding channel 8 communicating with the heating and mixing chamber 1 and a discharging channel 9 communicating with the uniform mixing chamber 3, and extrusion members are provided in both the feeding channel 8 and the discharging channel 9;

[0043] Furthermore, the extrusion piece includes a spiral extrusion blade 19 and a conveying shaft 20. A conveying motor 21 is provided at the bottom of the air blast feeding chamber 2. Two transmission chambers are provided inside the air blast feeding chamber 2. The end of the conveying shaft 20 passes through the transmission chamber and is fixedly connected with a bevel gear 22.

[0044] The conveying shaft 20 is rotatably connected to the side wall of the air drum feeding chamber 2 to achieve a supporting effect. The output end of the conveying motor 21 passes through the transmission cavity and is fixedly connected to a helical gear plate 23 meshing with multiple helical gears 22.

[0045] It is worth noting that the spiral extrusion blades 19 located in the feed channel 8 and the discharge channel 9 have opposite spiral directions and opposite feeding directions.

[0046] The ingredient processing part includes a grinding seat 10, on which an end cover 11 is rotatably arranged. The end cover 11 is provided with a quantitative conveying device for replenishing additives, which is used to replenish the additives. The inside of the end cover 11 is connected to a grinding ball 12 through a fixed column. The setting of the grinding ball 12 can realize re-grinding of the additives therein to make it fully powdered, which is convenient for rapid mixing with the hot melt.

[0047] Furthermore, the end cover 11 is connected to the side wall of the blending chamber through a connecting block 24 , and the grinding seat 10 is connected to the side wall of the blending chamber through a bearing seat. A grinding opening 25 is provided in the grinding seat 10 , and the grinding balls 12 are located in the grinding opening 25 .

[0048] A driving motor 13 is provided on the outer side wall of the air drum feeding chamber 2, and the driving motor 13 controls the grinding seat 10 to rotate through a joint control transmission member;

[0049] Furthermore, the interlocking transmission member includes a transmission gear ring 26 rotatably arranged on the side wall of the mixing chamber, the outer wall of the grinding seat 10 is fixedly connected with a rotating gear 27 meshing with the transmission gear ring 26, and the output end of the driving motor 13 is fixedly connected with a driving gear meshing with the transmission gear ring 26.

[0050] Under the action of the transmission gear ring 26, the driving motor 13 can synchronously control the rotation of the grinding seat 10 connected to multiple rotating gears 27, so that the additive material is divided into multiple portions and ground into powder, ensuring its grinding effect and ensuring sufficient mixing of the additive and the hot-melt mulch colloid.

[0051] A pneumatic conveying seat 14 is arranged at the bottom of the grinding seat 10, and the pneumatic conveying seat 14 is connected to a spraying hood 15 which is connected to the feeding chamber 7 through a pneumatic high-pressure spraying device, wherein the spraying hood 15 can disperse the powder and spray it outward, so that the powder can be evenly adhered to the continuously transported hot-melt mulch colloid to ensure sufficient mixing.

[0052] In order to ensure smooth airflow, a hollow chamber may be provided on the conveying shaft 20 in the lower discharge channel 9 to conduct the gas to the uniform mixing chamber 3 for overflow.

[0053] Furthermore, the pneumatic high-pressure injection device includes a pneumatic valve 28 connected to a high-pressure generator, wherein the high-pressure generator is a high-pressure gas generating device, which is a prior art and will not be described in detail herein. The pneumatic valve 28 is connected to the end cover 11 through a low-pressure supply line 30, and is connected to the pneumatic conveying seat 14 through a high-pressure gas supply line 29. The grinding ball 12 is provided with a supply channel connected to the low-pressure supply line 30.

[0054] It should be noted that the high-pressure airflow is ejected horizontally in the injection port 31, and the low-pressure airflow acts on the feed channel in the grinding ball 12 to send the additive powder in the vertical storage port 32 in the grinding seat 10 outward to achieve the discharge effect.

[0055] Furthermore, an injection port 31 connected to the injection hood body 15 is provided in the pneumatic conveying seat 14, a vertical storage port 32 connected to the injection port 31 is provided at the bottom of the grinding port 25, and a pneumatic cavity is provided at the other end of the injection port 31, wherein U-shaped connecting gas ports are provided on both sides of the inner wall of the pneumatic cavity, which are used to connect the gas under the action of the pneumatic piston 33, the inner wall of the pneumatic cavity is connected to the pneumatic piston 33 through a reset spring, the pneumatic piston 33 is connected to the inner tube body 34 through a connecting ring, the inner tube body 34 is in the injection port 31, and a matching opening 35 matched with the vertical storage port 32 is provided on it.

[0056] It should be noted that when the high-pressure air supply pipeline 29 does not supply air, the pneumatic piston 33 will drive the inner tube body 34 to the initial state under the action of the return spring. At this time, the side wall of the inner tube body 34 will seal the bottom of the vertical storage port 32. At this time, when the grinding seat 10 and the grinding balls 12 located above grind the additives, the qualified ground powder will enter the vertical storage port 32 for storage and will not leak; when the high-pressure air supply pipeline 29 supplies air, the air pressure will drive the pneumatic piston 33 to move, so that the pneumatic piston 33 will eventually move to the U-shaped connecting air port. At this time, the matching opening 35 on the inner tube body 34 is just at the vertical storage port 32, achieving the effect of low-pressure discharging.

[0057] The uniform mixing chamber 3 is provided with a mixing and stirring blade 16 driven by a mixing motor to achieve the effect of quickly mixing the uniformly dispersed additives with the hot-melt mulch colloid. An extrusion pipe for discharging the material is provided on one side of the uniform mixing chamber 3.

[0058] When the present invention is used, it comprises the following steps:

[0059] The first step is hot melting of degradable particles: a plurality of degradable particles and heat-resistant powder additives are mixed in a heating mixing chamber 1, and are continuously heated during the mixing process to form a hot-melt mulch film colloid;

[0060] Grinding the additive: putting the additive into the grinding opening 25 in the grinding seat 10, and through the continuous rotation of the grinding seat 10, the grinding balls 12 grind the additive into powder; specifically, the driving gear connected to the driving motor 13 rotates to drive the transmission gear ring 26 meshing with it to rotate, thereby driving the multiple rotating gears 27 to rotate. When the rotating gears 27 rotate, the grinding seat 10 is driven to rotate at a high speed, and the additive in the grinding opening 25 is driven to be ground into powder and stored in the vertical storage port 32;

[0061] The second step is to uniformly mix the additives: after completing the first step, the conveying motor 21 is controlled to drive the multiple bevel gears 22 to rotate through the bevel gear plate 23, thereby realizing the rotation of the spiral extrusion blades 19 connected to the conveying shaft 20, conveying the hot-melt mulch colloid into the feeding chamber 7, conveying the powdered additives to the injection port 31 through the low-pressure feeding pipeline 30, and rapidly injecting the powdered additives into the feeding chamber 7 under the action of the high-pressure air supply pipeline 29, uniformly adhering the additive powder to the surface of the hot-melt mulch colloid conveyed by the extruder, realizing uniform addition of the additive powder, thereby shortening the stirring time between the late additive and the hot-melt mulch colloid, shortening the heating time between the additive and the hot-melt mulch colloid, and effectively avoiding the influence of temperature on the additive;

[0062] The third step is stirring, mixing and discharging: under the action of the discharging channel 9, the raw materials adhering to and mixed with additives are transported to the uniform mixing chamber 3 through the discharging channel 9, and are quickly mixed and uniformly mixed in the uniform mixing chamber 3, and then subsequent processing is carried out to ensure the rapid mixing of the degradable mulch film modified material.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fully biodegradable mulch modified material blending device, comprising a blending chamber, It is characterized in that The blending chamber is composed of an upper heating mixing chamber (1), a middle air-blast feeding chamber (2), and a lower uniform mixing chamber (3); An openable cover plate (4) is provided on the top of the heating and mixing chamber (1), a mixing motor (5) is provided on the cover plate (4), and a heating and stirring blade (6) is installed at the output end of the mixing motor (5); The air blast feeding chamber (2) comprises an extrusion conveying component provided inside and connected to the heating mixing chamber (1) and a plurality of ingredient processing components provided outside; The extrusion conveying member comprises a plurality of feeding chambers (7) provided on the outer wall of the heating and mixing chamber (1), the side wall of the feeding chamber (7) being provided with a feeding channel (8) communicating with the heating and mixing chamber (1) and a discharging channel (9) communicating with the uniform mixing chamber (3), and the feeding channel (8) and the discharging channel (9) being provided with extrusion members; The batching processing part comprises a grinding seat (10), an end cover (11) is rotatably arranged above the grinding seat (10), a grinding ball (12) is connected to the inside of the end cover (11) via a fixing column, a driving motor (13) is arranged on the outer wall of the air drum feeding chamber (2), the driving motor (13) controls the grinding seat (10) to rotate via a joint control transmission member, a pneumatic conveying seat (14) is arranged at the bottom of the grinding seat (10), and the pneumatic conveying seat (14) is connected to a spray cover (15) connected to the feeding chamber (7) via a pneumatic high-pressure spray device; The uniform mixing chamber (3) is provided with a mixing and stirring blade (16) driven by a mixing motor, and one side of the uniform mixing chamber (3) is provided with an extrusion pipe for discharging materials; The end cover (11) is connected to the side wall of the blending chamber via a connecting block (24); the grinding seat (10) is connected to the side wall of the blending chamber via a bearing seat; a grinding opening (25) is provided in the grinding seat (10); and the grinding ball (12) is located in the grinding opening (25); The linked control transmission member comprises a transmission gear ring (26) rotatably arranged on the side wall of the mixing chamber, the outer side wall of the grinding seat (10) is fixedly connected with a rotating gear (27) meshingly connected with the transmission gear ring (26), and the output end of the driving motor (13) is fixedly connected with a driving gear meshingly connected with the transmission gear ring (26); The pneumatic high-pressure injection device comprises a pneumatic valve (28) connected to a high-pressure generator, the pneumatic valve (28) being connected to the end cover (11) via a low-pressure supply pipeline (30), and being connected to the pneumatic conveying seat (14) via a high-pressure supply pipeline (29), and the grinding ball (12) being provided with a supply channel communicating with the low-pressure supply pipeline (30); The pneumatic conveying seat (14) is provided with an injection port (31) in communication with the injection cover (15); the bottom of the grinding port (25) is provided with a vertical material storage port (32) in communication with the injection port (31); the other end of the injection port (31) is provided with a pneumatic cavity; the inner wall of the pneumatic cavity is connected to a pneumatic piston (33) via a return spring; the pneumatic piston (33) is connected to an inner tube (34) via a connecting ring; the inner tube (34) is located in the injection port (31) and is provided with a matching opening (35) adapted to the vertical material storage port (32); The spray hood (15) can disperse the powder and spray it outward, so that the powder can be evenly adhered to the continuously transported hot-melt mulch film colloid, ensuring sufficient mixing; The high-pressure airflow is ejected horizontally in the ejection port (31), and the low-pressure airflow acts on the feed channel in the grinding ball (12), thereby delivering the additive powder in the vertical storage port (32) in the grinding seat (10) to the outside; The hot-melt mulch colloid is conveyed into the feeding chamber (7), and the powdered additive is conveyed into the injection port (31) through the low-pressure feeding pipeline (30). The powdered additive is rapidly injected into the feeding chamber (7) under the action of the high-pressure air supply pipeline (29), so that the additive powder is uniformly adhered to the surface of the hot-melt mulch colloid conveyed by the extruder, and the additive powder is uniformly added, thereby shortening the stirring time between the additive and the hot-melt mulch colloid at a later stage, and shortening the heating time between the additive and the hot-melt mulch colloid.

2. A fully biodegradable mulch film modified material blending device according to claim 1, It is characterized in that A centralized discharge port (17) is provided at the bottom of the heating and mixing chamber (1), a plurality of the feed channels (8) are connected to the centralized discharge port (17), and an electric gate (18) is provided at the centralized discharge port (17).

3. A fully biodegradable mulch film modified material blending device according to claim 1, It is characterized in that The extrusion member comprises a spiral extrusion blade (19) and a conveying shaft (20); a conveying motor (21) is arranged at the bottom of the air blast feeding chamber (2); two transmission chambers are provided inside the air blast feeding chamber (2); an end of the conveying shaft (20) passes through the transmission chamber and is fixedly connected to a bevel gear (22); an output end of the conveying motor (21) passes through the transmission chamber and is fixedly connected to a bevel gear disc (23) meshing with a plurality of bevel gears (22).

4. A blending method according to any one of claims 1 to 3, wherein the blending device comprises a fully biodegradable mulch film modified material blending device, It is characterized in that The following steps are involved: S1. Hot melting of degradable particles: a plurality of degradable particles and heat-resistant powder additives are mixed in a heating mixing chamber (1), and are continuously heated during the mixing process to form a hot-melt mulch film colloid; S2, grinding the additive: placing the additive into the grinding opening (25) in the grinding seat (10), and continuously rotating the grinding seat (10) so that the grinding balls (12) grind the additive into powder; S3, uniformly mixing the additive: delivering the powdered additive to the injection port (31) through the low-pressure feed pipeline (30), and rapidly injecting the powdered additive into the feeding chamber (7) under the action of the high-pressure air supply pipeline (29), thereby injecting and mixing the hot-melt mulch film colloid delivered by the extruder; S4, stirring, mixing and discharging: the raw materials adhering to and mixed with additives are transported to the uniform mixing chamber (3) through the discharging channel (9), and are quickly mixed and uniformly mixed in the uniform mixing chamber (3).

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