A hot melt device for recycling and reusing waste plastics

Abstract

The present invention relates to the field of plastic recycling technology, specifically a hot melt device for recycling and reusing waste plastics, comprising a cabinet, a motor, a reducer, a fuselage, and a head. The motor, reducer, and fuselage are fixedly connected to the upper surface of the cabinet from left to right. The motor output is connected to the reducer input, and the reducer output is connected to the screw input in the fuselage. The head is mounted on the right end of the fuselage. The motor driving force causes the reducer to drive the fuselage to rotate, and the screw squeezes the plastic liquid from the head. The device also includes a dehumidification mechanism and a purification mechanism. The dehumidification mechanism is mounted on the top feed port of the fuselage, and the purification mechanism is mounted on the exhaust port of the fuselage; a valve is mounted on the top feed port of the fuselage; and a drying cylinder is mounted on top of the valve. This allows the material to be dried before hot melting, preventing broken strips caused by poor exhaust, achieving a gas purification effect, and preventing direct emission of polluted air, thereby playing an environmental role.

Description

Technical Field

[0001] The invention relates to the technical field of plastic recycling, in particular to a hot melt device for recycling and reusing waste plastics. Background Art

[0002] Plastic recycling refers to the process of recycling waste plastics to turn them into valuable resources. Waste plastics in my country mainly include plastic films, plastic yarns and woven fabrics, foam plastics, plastic packaging boxes and containers, daily plastic products, plastic bags, and agricultural mulch. Plastic recycling involves sorting, washing, drying, crushing, and extrusion granulation.

[0003] Different types of plastics have different water absorption properties. Before the material is put into the extruder, the plastic will absorb moisture. During hot melt extrusion, if the moisture content is too high, it will affect the exhaust and cause the strips to break during extrusion. When hot melted in the extruder, the organic gas produced is toxic and direct discharge will pollute the air. Therefore, a hot melt device with environmental protection function is needed to meet the needs of extrusion granulation. Summary of the Invention

[0004] The purpose of the present invention is to solve the existing problems of being unable to dehumidify before extrusion and being unable to purify the discharged gas.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: a hot melt device for recycling and reusing waste plastics, including a cabinet, a motor, a reducer, a fuselage and a head. The motor, reducer and fuselage are fixedly connected to the upper surface of the cabinet from left to right, the motor output end is connected to the reducer input end, and the reducer output end is connected to the screw input end in the fuselage. The head is installed at the right end of the fuselage. The reducer can drive the fuselage to rotate through the driving force of the motor, and the screw squeezes the plastic liquid from the head. It also includes a dehumidification mechanism and a purification mechanism. The dehumidification mechanism is installed at the feed port on the top of the fuselage, and the purification mechanism is installed at the exhaust port of the fuselage.

[0006] Specifically, the purpose is to dehumidify the material before extrusion to prevent poor exhaust during hot melting and avoid the problem of broken strips. The dehumidification mechanism includes a valve, a drying cylinder, an air inlet, an air hood, a cover plate, an agitator, a mesh cylinder and an extraction component. The valve is installed at the feed port on the top of the fuselage; the drying cylinder is installed at the top of the valve, and a plurality of air inlets are equidistantly opened at the bottom of the outer wall of the drying cylinder along the circumferential direction; the air hood is installed on the outer wall of the drying cylinder, and the air hood covers the air inlet; the cover plate is connected to the left end of the upper surface of the drying cylinder by a hinge; the agitator is installed at the center position of the upper surface of the drying cylinder, and the material is stirred by the agitator; the mesh cylinder is vertically installed at the bottom of the inner cavity of the drying cylinder for storing materials; the extraction component is installed on the outer wall of the drying cylinder.

[0007] Specifically, the extraction component includes a first air pipe, a heat sink, a flow channel, a condenser, a drainage pipe, a first water collecting bucket, a second air pipe, a hot air blower and a third air pipe. One end of the first air pipe is installed at the right end of the upper surface of the drying cylinder; the heat sink is installed at the other end of the first air pipe, and a flow channel is opened inside the heat sink, and the flow channel is connected to the first air pipe; there are two condensers, which are respectively installed on the upper and lower surfaces of the heat sink, and the heat sink is cooled by the condenser; one end of the drainage pipe is vertically installed at the right end of the lower surface of the heat sink, and the drainage pipe is connected to the flow channel; the first water collecting bucket is screwed to the other end of the drainage pipe; one end of the second air pipe is installed at the right end of the heat sink, and the second air pipe is connected to the flow channel; the hot air blower is installed at the other end of the second air pipe; one end of the third air pipe is installed at the hot air blower outlet, and the other end is connected to the outer wall of the air hood.

[0008] Specifically, the heat dissipation plate is inclined downward from left to right.

[0009] Specifically, the flow channels are distributed inside the heat dissipation plate in a wave shape.

[0010] Specifically, the purpose is to purify harmful gases generated during hot melting of plastics to prevent direct emission of polluted air. The purification mechanism includes a cooling component, a purification cylinder, a second water collecting bucket, a hollow shaft, a filter cylinder, a transmission component, a support seat, an activated carbon filter plate and a UV lamp. The cooling component is vertically installed at the exhaust hole of the fuselage; the purification cylinder is vertically installed at the right end of the cooling component; the second water collecting bucket is screwed to the bottom end of the purification cylinder; the hollow shaft is rotatably installed at the top center position of the purification cylinder through a bearing; the filter cylinder is installed at the bottom end of the hollow shaft; the transmission component is installed at the top of the purification cylinder; the support seat is installed at the top center position of the transmission component; the activated carbon filter plate is placed in the inner cavity of the support seat, and the gas is filtered through the activated carbon filter plate; the UV lamp is vertically installed at the bottom of the inner cavity of the purification cylinder.

[0011] Specifically, the filter cartridge is made of honeycomb titanium dioxide and has a cylindrical structure.

[0012] Specifically, the cooling component includes a heat dissipation pipe, a mounting plate, a fan and a connecting pipe. The heat dissipation pipe is vertically installed on the exhaust hole of the fuselage; the mounting plate is horizontally installed on the bottom end of the outer wall of the heat dissipation pipe; there are two fans, which are respectively installed on the left and right sides of the mounting base; one end of the connecting pipe is installed on the top of the heat dissipation pipe, and the other end is connected to the outer wall of the purification cylinder.

[0013] Specifically, the outer wall of the heat dissipation pipe is provided with heat dissipation fins along the circumferential direction.

[0014] Specifically, the transmission assembly includes a dust cover, a motor, a driving gear and a driven gear. The dust cover is installed on the upper surface of the purification cylinder, and the top of the dust cover is installed with the bottom of the support base; the motor is installed at the left end of the upper surface of the dust cover; the driving gear is installed at the output end of the motor; the driven gear is installed at the top of the outer wall of the hollow shaft, and the driven gear is meshed with the driving gear.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention generates hot air through a hot air blower, enters the air hood through the third air pipe, and is released into the drying drum. As the agitator stirs the material, the material is evenly dried. The evaporated water vapor flows into the flow channel with the hot air. The condenser cools the heat sink. The water vapor is cooled and liquefied to form accumulated water. The first water collecting bucket collects the accumulated water to reduce the humidity of the hot air. The hot air blower continuously heats the gas to dry the material before hot melting, preventing broken strips caused by poor exhaust.

[0017] 2. The present invention uses a fan to increase the air flow rate around the heat pipe, cools the gas generated by the hot melt of the plastic passing through the heat pipe, and reduces the gas temperature to an optimal temperature conducive to degradation. The UV lamp emits ultraviolet rays to the filter cartridge, and the filter cartridge degrades the organic matter in the gas, which is then adsorbed for the second time by the activated carbon filter plate to achieve a gas purification effect, prevent direct emission of polluted air, and play an environmental role. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the dehumidification mechanism structure of the present invention;

[0020] Figure 3 This is a front cross-sectional view of the dehumidification mechanism of the present invention;

[0021] Figure 4 This is a top cross-sectional view of the heat dissipation plate of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the purification mechanism of the present invention;

[0023] Figure 6 This is a front cross-sectional view of the purification cartridge of the present invention;

[0024] Figure 7 This is an enlarged view of point A of the present invention.

[0025] Figure: 1, cabinet; 2, motor; 3, reducer; 4, fuselage; 5, head; 6, dehumidification mechanism; 7, purification mechanism; 61, valve; 62, drying drum; 63, air inlet; 64, air hood; 65, cover; 66, stirrer; 67, mesh drum; 68, extraction component; 681, first air pipe; 682, heat sink; 683, flow channel; 684, condenser; 685, drainage pipe; 686, first water collection bucket; 687, second air pipe; 688, hot air blower; 689, third air pipe; 71, cooling component; 72, purification cylinder; 73, second water collection bucket; 74, hollow shaft; 75, filter cylinder; 76, transmission component; 77, support seat; 78, activated carbon filter plate; 79, UV lamp; 711, heat pipe; 712, mounting plate; 713, fan; 714, connecting pipe; 761, dust cover; 762, motor; 763, driving gear; 764, driven gear. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the preferred embodiments of the present invention are further described below in conjunction with specific implementation methods and accompanying drawings.

[0027] See also Figure 1-Figure 7 The present invention provides a hot melt device for recycling and reusing waste plastics, including a cabinet 1, a motor 2, a reducer 3, a fuselage 4 and a head 5. The motor 2, the reducer 3 and the fuselage 4 are installed on the upper surface of the cabinet 1 from left to right. The output end of the motor 2 is connected to the input end of the reducer 3, and the output end of the reducer 3 is connected to the input end of the screw on the fuselage 4. The right end of the fuselage 4 is installed with the head 5. Under the drive of the motor 2, the reducer 3 drives the screw on the fuselage 4 to rotate, allowing the plastic liquid to move from left to right in the fuselage 4, and the head 5 extrude the plastic liquid. The feed port on the top of the fuselage 4 is installed with a dehumidification mechanism 6, and the exhaust port of the fuselage 4 is installed with a purification mechanism 7.

[0028] As a preferred embodiment, further, the dehumidification mechanism 6 includes a valve 61 installed at the feed port on the top of the fuselage 4, a drying cylinder 62 is installed on the top of the valve 61, a plurality of air inlet holes 63 are equidistantly provided at the bottom of the outer wall of the drying cylinder 62 along the circumferential direction, an air hood 64 is installed on the outer wall of the drying cylinder 62 to close the air inlet holes 63, a cover plate 65 is hingedly connected to the left side of the upper surface of the drying cylinder 62, an agitator 66 is installed at the center position of the upper surface of the drying cylinder 62, the material is stirred by the agitator 66, a mesh cylinder 67 is vertically installed at the bottom of the inner cavity of the drying cylinder 62 for material storage, and an extraction component 68 is installed on the outer wall of the drying cylinder 62.

[0029] As a preferred solution, further, the extraction component 68 includes one end of a first air pipe 681 installed on the right side of the top of the drying cylinder 62, and a heat sink 682 is installed on the other end of the first air pipe 681. A flow channel 683 that passes through the heat sink 682 is provided inside the heat sink 682, and the flow channel 683 is connected to the first air pipe 681. Condensers 684 are installed on the upper and lower surfaces of the heat sink 682. The flow channel 683 is distributed in a wavy shape inside the heat sink 682, extending the residence time of the gas passing through the flow channel 683, allowing the condenser 684 to cool the gas and liquefy the water vapor in the gas. The heat sink 682 is tilted downward from left to right, which can make The liquefied accumulated water flows to the right, and a drainage pipe 685 connected to the flow channel 683 is installed on the right side of the lower surface of the heat sink 682. The first water collecting bucket 686 is screwed to the bottom end of the outer wall of the drainage pipe 685, and the accumulated water is collected by the first water collecting bucket 686. One end of a second air pipe 687 connected to the flow channel 683 is installed on the right side of the heat sink 682, and a hot air blower 688 is installed on the other end of the second air pipe 687. The hot air blower 688 can provide suction and heat the gas to provide hot air for drying the material. One end of a third air pipe 689 is installed at the air outlet of the hot air blower 688, and the other end of the third air pipe 689 is connected to the outer wall of the air hood 64.

[0030] As a preferred embodiment, further, the purification mechanism 7 includes a cooling component 71 vertically installed at the exhaust port of the fuselage 4, a purification cylinder 72 is vertically installed at the right end of the cooling component 71, and a second water collecting bucket 73 is screwed to the bottom of the purification cylinder 72 to collect water generated by organic gas through photocatalysis, and a rotatable hollow shaft 74 is installed at the center position of the upper surface of the purification cylinder 72 through a bearing, and a filter cylinder 75 is installed at the bottom of the hollow shaft 74. The filter cylinder 75 is made of honeycomb titanium dioxide material and is breathable. Titanium dioxide produces highly oxidizing free radicals after being irradiated by ultraviolet rays, which can effectively degrade the organic pollutant gas generated by hot melting of plastic and mainly generate carbon dioxide and water. A transmission component 76 is installed on the upper surface of the purification cylinder 72, and a support seat 77 is installed at the center position of the upper surface of the transmission component 76. An activated carbon filter plate 78 is placed in the inner cavity of the support seat 77, and the harmful gas is further filtered through the activated carbon filter plate 78. A UV lamp 79 is vertically installed at the bottom of the inner cavity of the purification cylinder 72, and the UV lamp emits ultraviolet rays outward.

[0031] As a preferred solution, further, the cooling component 71 includes a heat dissipation pipe 711 vertically installed at the exhaust port of the fuselage 4, and the outer wall of the heat dissipation pipe 711 is provided with heat dissipation fins along the circumference to expand the heat dissipation surface area of ​​the heat dissipation pipe 711, cool the gas generated by the hot melt of the plastic, and facilitate gas purification. A mounting plate 712 is horizontally installed at the bottom of the outer wall of the heat dissipation pipe 711, and fans 713 are installed on the left and right sides of the mounting plate 712. The fan 713 blows air upward to increase the air flow rate around the heat dissipation pipe 711 and carry the heat of the heat dissipation pipe 711. One end of the connecting pipe 714 is installed at the top of the heat dissipation pipe 711, and the other end of the connecting pipe 714 is installed at the bottom of the outer wall of the purification cylinder 72.

[0032] As a preferred solution, further, the transmission assembly 76 includes a dust cover 761 installed on the upper surface of the purification cylinder 72, the top of the dust cover 761 is installed at the bottom of the support seat 77, a motor 762 is installed on the left side of the upper surface of the dust cover 761, a driving gear 763 is installed at the output end of the motor 762, and a driven gear 764 meshing with the driving gear 763 is installed on the top of the outer wall of the hollow shaft 74. Under the drive of the motor 762, the hollow shaft 74 can drive the filter cylinder 75 to rotate through the transmission of the driving gear 763 and the driven gear 764.

[0033] Working principle:

[0034] Step 1: Open the cover 65 and put the washed and screened plastic fragments into the mesh drum 67. The material is stirred by the stirrer 66 to make the material move in the mesh drum 67. The hot air blower 688 delivers hot air to the air hood 64 through the third air pipe 689. The hot air enters the drying drum 62 through the air inlet 63 to dry the material. The moisture in the material enters the first air pipe 681 along with the gas. When passing through the flow channel 683, the condenser 684 cools the heat sink 682, thereby cooling the gas. The water vapor liquefies to form accumulated water. The accumulated water enters the first water collecting bucket 686 through the drainage pipe 685 to remove the moisture in the gas. Then, the gas returns to the hot air blower 688 under the suction of the hot air blower 688, thereby achieving material dehumidification. Open the valve 61 and the material enters the fuselage 4.

[0035] In step 2, the fuselage 4 heats the material. The organic gas generated during heating floats out from the exhaust port of the fuselage 4, and the plastic fragments are melted into liquid. Driven by the motor 2, the reducer 3 drives the screw in the fuselage 4 to rotate, and the plastic liquid is squeezed out from the head 5 to achieve hot melting of the plastic fragments;

[0036] In step three, the gas generated by the hot melt of the plastic enters the heat dissipation pipe 711, and the fan 713 increases the airflow velocity on the surface of the heat dissipation pipe 711, takes away the heat on the surface of the heat dissipation pipe 711, and cools the gas to meet the needs of subsequent gas purification. The cooled gas then enters the purification cylinder 72, and in the process of the gas passing through the filter cylinder 75, the UV lamp 79 emits ultraviolet rays to the filter cylinder 75. The UV photocatalytic titanium dioxide can produce superoxide and hydroxyl free radicals under light. These free radicals have strong oxidizing properties and can effectively degrade organic pollutants. After degradation, carbon dioxide and water are mainly generated. Driven by the motor 762, the filter cylinder 75 can be rotated through the driving gear 763 and the driven gear 764, which not only allows the gas to fully contact the free radicals, but also uses centrifugal force to get rid of the moisture on the filter cylinder 75. The moisture is collected by the second water collecting bucket 73, and the purified gas reaches the activated carbon filter plate 78 through the hollow shaft 74 for secondary filtration of the gas, thereby achieving gas purification and preventing air pollution.

[0037] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A hot melt device for recycling and reusing waste plastics, comprising a cabinet (1), a motor (2), a reducer (3), a body (4) and a head (5), wherein the motor (2), the reducer (3) and the body (4) are fixedly connected to the upper surface of the cabinet (1) from left to right, the output end of the motor (2) is connected to the input end of the reducer (3), and the output end of the reducer (3) is connected to the input end of the screw in the body (4), and the head (5) is installed at the right end of the body (4), and the reducer (3) can drive the body (4) to rotate through the driving force of the motor (2), and the screw squeezes the plastic liquid out of the head (5), characterized in that It also includes a dehumidification mechanism (6) and a purification mechanism (7), wherein the dehumidification mechanism (6) is installed at the top feed port of the fuselage (4), and the purification mechanism (7) is installed at the exhaust port of the fuselage (4); The dehumidification mechanism (6) comprises: A valve (61) is installed at the feed inlet on the top of the machine body (4); A drying cylinder (62) is installed on the top of the valve (61), and a plurality of air inlet holes (63) are opened at equal intervals along the circumferential direction on the bottom of the outer wall of the drying cylinder (62); An air hood (64) is mounted on the outer wall of the drying cylinder (62), and the air hood (64) covers the air inlet (63); A cover plate (65) is connected to the left end of the upper surface of the drying cylinder (62) via a hinge; A stirrer (66) is installed at the center of the upper surface of the drying cylinder (62), and the material is stirred by the stirrer (66); A mesh drum (67) is vertically mounted at the bottom of the inner cavity of the drying drum (62) and is used for storing materials; An extraction assembly (68) mounted on the outer wall of the drying cylinder (62); The purification mechanism (7) comprises: A cooling assembly (71) is vertically mounted on the exhaust hole of the fuselage (4); A purification cylinder (72) is vertically mounted on the right end of the cooling assembly (71); The second water collecting bucket (73) is screwed to the bottom end of the purification cylinder (72); A hollow shaft (74) is rotatably mounted at the top center of the purification cylinder (72) via a bearing; A filter cartridge (75) is mounted on the bottom end of the hollow shaft (74), wherein the filter cartridge (75) is made of honeycomb titanium dioxide and has a cylindrical structure; A transmission assembly (76) is mounted on the top of the purification cylinder (72); A support seat (77) is mounted at the top center of the transmission assembly (76); An activated carbon filter plate (78) is placed in the inner cavity of the support base (77) to filter gas through the activated carbon filter plate (78); A UV lamp (79) is vertically mounted at the bottom of the inner cavity of the purification cylinder (72); The cooling component (71) comprises: A heat dissipation pipe (711) is vertically mounted on the exhaust hole of the fuselage (4); A mounting plate (712) mounted transversely on the bottom end of the outer wall of the heat dissipation pipe (711); Two fans (713) are installed on the left and right sides of the mounting plate (712) respectively; A connecting pipe (714), one end of which is mounted on the top of the heat dissipation pipe (711) and the other end of which is connected to the outer wall of the purification cylinder (72); The transmission assembly (76) includes: A dust cover (761) is mounted on the upper surface of the purification cylinder (72), and the top of the dust cover (761) is mounted on the bottom of the support base (77); A motor (762) is mounted on the left end of the upper surface of the dust cover (761); A driving gear (763) is mounted on the output end of the motor (762); The driven gear (764) is mounted on the top end of the outer wall of the hollow shaft (74), and the driven gear (764) is meshedly connected with the driving gear (763).

2. The hot melt device for recycling and reusing waste plastics according to claim 1, characterized in that: The extraction component (68) includes: A first air pipe (681), one end of which is mounted on the right end of the upper surface of the drying cylinder (62); A heat sink (682) is installed at the other end of the first air pipe (681), a flow channel (683) is provided inside the heat sink (682), and the flow channel (683) is communicated with the first air pipe (681); Condensers (684), two in number, are mounted on the upper and lower surfaces of the heat sink (682), respectively, and the heat sink (682) is cooled by the condensers (684); A drainage pipe (685), one end of which is vertically mounted on the right end of the lower surface of the heat dissipation plate (682), and the drainage pipe (685) is connected to the flow channel (683); A first water collecting bucket (686) is screwed to the other end of the drainage tube (685); A second air pipe (687), one end of which is mounted on the right end of the heat dissipation plate (682), and the second air pipe (687) is in communication with the flow channel (683); A hot air blower (688) is installed at the other end of the second air pipe (687); The third air pipe (689) has one end mounted on the air outlet of the hot air blower (688) and the other end connected to the outer wall of the air hood (64).

3. The hot melt device for recycling and reusing waste plastics according to claim 2, characterized in that: The heat dissipation plate (682) is inclined downward from left to right.

4. The hot melt device for recycling and reusing waste plastics according to claim 3, characterized in that: The flow channel (683) is distributed in a wave-like manner inside the heat dissipation plate (682).

5. The hot melt device for recycling and reusing waste plastics according to claim 4, characterized in that: The outer wall of the heat dissipation pipe (711) is provided with heat dissipation fins along the circumferential direction.

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