A rapid hot melting equipment for plastic recycling and a hot melting method

Abstract

The application relates to the technical field of plastic recycling, and specifically relates to a rapid hot melting equipment for plastic recycling and a hot melting method, which comprises a base and further comprises an outer cylinder and an inner cylinder, the outer cylinder is fixed on the base, the inner cylinder is movably arranged in the inner part of the outer cylinder, the cylinder walls of the two are heated by electricity, a gap is reserved between the inner wall of the outer cylinder and the outer wall of the inner cylinder, and a heating gap is formed; a plurality of rows of first through holes are equidistantly arranged on the inner cylinder along the circumference and equidistantly distributed along the axial direction of the inner cylinder; during the hot melting process, the air pumping mechanism can first pump air into the inner cylinder under the condition that the first through holes are in a blocked state, so that a pressure difference exists between the inner cylinder and the heating gap; after the first through holes are connected, the plastic in the inner cylinder which has been heated to a molten state is caused to overflow through the first through holes by the pressure difference, the molten plastic is timely discharged and separated, the hot melting burden in the inner cylinder is effectively relieved, the problem that excessive molten plastic in the inner cylinder occupies heat energy and is not conducive to the efficient melting of un-melted plastic is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic recycling, and particularly relates to a rapid hot melting equipment for plastic recycling and a hot melting method. BACKGROUND

[0002] Plastic recycling is an environmental protection behavior of recycling waste plastic products by using specific recycling processes and recycling them for reuse. According to the use after recycling, the main application directions include production of recycled plastic particles, conversion into fuel, and use for power generation, etc. In the plastic recycling process, the hot melting method is usually used for granulation treatment of recycled plastics at the present stage, so as to facilitate subsequent reuse.

[0003] The existing hot melting means usually crushes the plastic to be melted in advance, and then one-time feeds the plastic into the hot melting equipment for hot melting treatment. After the plastic in the hot melting equipment is completely melted, the discharge port of the equipment is opened, and the molten plastic is discharged into the next processing procedure.

[0004] Due to the existing hot melting means, the plastic is one-time fed into the hot melting cavity, and can be discharged only after the plastic in the hot melting cavity is completely melted. In the hot melting process, the plastic close to the heat source (usually the wall of the hot melting cylinder) is preferentially melted. Although some hot melting cavities are provided with stirring mechanisms to stir the plastic parts, with the heating, the molten plastic in the hot melting cavity gradually increases. This part of the molten plastic occupies heat energy, and also affects the contact of the un-melted plastic with the heat source, so that the efficiency of the hot melting treatment needs to be improved. SUMMARY

[0005] The present application aims to provide a rapid hot melting equipment for plastic recycling and a hot melting method to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a rapid hot melting equipment for plastic recycling, comprising a base, further comprising: an outer cylinder and an inner cylinder, the outer cylinder is fixed on the base, the inner cylinder is movably arranged in the inner part of the outer cylinder, the cylinder walls of the two are heated by electricity, and a gap is reserved between the inner wall of the outer cylinder and the outer wall of the inner cylinder to form a heating gap; wherein a plurality of rows of first through holes are equidistantly arranged on the inner cylinder along the circumference and equidistantly distributed along the axial direction of the inner cylinder, and a control mechanism for switching the first through hole from the open state to the blocked state is arranged on the inner cylinder; a pump gas mechanism connected with the control mechanism is further arranged on the outer cylinder. When the first through hole is in the blocked state, the pump gas mechanism pumps gas into the inner cylinder, so that a pressure difference is formed between the inner cylinder and the heating gap, so that after the first through hole is opened, the molten plastic in the inner cylinder can enter the heating gap through the first through hole.

[0007] As a further scheme of the present application, the inner wall of the outer cylinder is fixed with an assembling ring, the inner cylinder is sealingly and rotatably connected with the assembling ring, a driving motor is installed on the outer cylinder, the output shaft of the driving motor extends into the heating slot and is fixed with a bevel gear at the end, and the bevel gear is engaged with a bevel gear ring fixed on the inner cylinder.

[0008] As a further scheme of the present application, the pump mechanism comprises a box body fixed on the outer cylinder, the bottom of the box body is open, and a piston plate is sealingly and slidably arranged in the box body, two air cylinders are fixed on the base, and the movable ends of the two air cylinders are fixed with the piston plate; wherein the box body is connected with the heating slot and the inner cylinder through a gas guide pipe group, and the piston plate is connected with the control mechanism.

[0009] As a further scheme of the present application, the gas guide pipe group comprises a first pipe and a second pipe arranged on the box body, the first pipe is connected with the inner cylinder, the second pipe is connected with the heating slot, and a first one-way valve and a second one-way valve are respectively installed on the first pipe and the second pipe.

[0010] As a further scheme of the present application, the control mechanism comprises a transmission ring arranged on the outer wall of the inner cylinder and capable of sliding along the axial direction of the inner cylinder, a plurality of baffle plates are fixedly connected with the transmission ring and are distributed at equal intervals along the circumference, a plurality of second through holes are arranged at equal intervals on the baffle plates and are matched with the first through holes, the baffle plates are sealingly and slidably attached to the outer wall of the inner cylinder, a transmission structure is arranged between the transmission ring and the piston plate, the transmission structure can drive the transmission ring to slide relative to the inner cylinder with the baffle plates, so that the first through holes are misaligned or overlapped with the second through holes.

[0011] As a further scheme of the present application, the transmission structure comprises a follower connected with the piston plate, a driven part arranged on the outer cylinder and matched with the follower, and a sliding matching part connecting the driven part and the transmission ring.

[0012] As a further scheme of the present application, the follower comprises a stand column fixedly connected with the piston plate and an arc-shaped arm fixedly connected with the stand column away from the piston plate, and a roller is installed at the end of the arc-shaped arm away from the stand column; wherein the roller can drive the driven part to move along the radial direction of the outer cylinder, so that the driven part drives the sliding matching part to slide the transmission ring relative to the inner cylinder.

[0013] As a further scheme of the present application: the driven member comprises two guide columns fixed to the outer wall of the outer cylinder and a vertical arm in sliding connection with the two guide columns, a spring is sleeved on the outer periphery of the guide column, one end of the spring is connected to the outer wall of the outer cylinder, and the other end is connected to a circular truncated cone fixed to the end of the guide column away from the outer cylinder; wherein the roller is in abutment with the vertical arm, and an inclined block cooperating with the roller is fixed on the vertical arm.

[0014] As a further scheme of the present application: the outer wall of the transmission ring is provided with an annular groove, the sliding fitting member comprises a sliding block slidingly fitted in the annular groove, two driven blocks are fixedly connected to the sliding block, an inclined through slot is provided on the driven block, a sliding plate fixed to the vertical arm is also sealingly and slidingly arranged on the outer cylinder, a column body is fixed to the end of the sliding plate away from the vertical arm, the column body penetrates through the inclined through slot and is in sliding connection with the driven block.

[0015] A kind of rapid hot melting method for plastic recycling, using the hot melting equipment, when hot melting treatment, the plastic to be melted is put into inner cylinder, and heated and melted;On the premise that first port is in the state of plugging, pump gas mechanism pumps gas into inner cylinder, so that pressure difference is formed in inner cylinder and heating gap, then, first port is conducted, so that the plastic in inner cylinder that has been heated to molten state can overflow to heating gap through first port, and is guided out of separation, and falls to the bottom of outer cylinder through heating gap and is temporarily stored.

[0016] Compared with the prior art, the beneficial effects of the present application are: by setting the outer cylinder and the inner cylinder, the inner cylinder is located in the outer cylinder, forming a double-layer heating structure, and a gap is reserved between the inner wall of the outer cylinder and the outer wall of the inner cylinder to form a heating gap, during the hot melting process, the pump gas mechanism can first pump gas into the inner cylinder under the condition that the first port is in the state of plugging, so that there is a pressure difference between the inner cylinder and the heating gap, after the first port is conducted, the molten plastic in the inner cylinder is caused to overflow through the first port by the pressure difference.

[0017] Therefore, the timely separation function of molten plastic is realized during the hot melting process, effectively relieving the hot melting burden in the inner cylinder, avoiding the problem that too much molten plastic in the inner cylinder occupies heat energy, thereby being not conducive to the efficient melting of un-melted plastic.

[0018] Secondly, the heating gap provides a narrower heating channel for the molten plastic, the heat in the heating gap is more concentrated, which can further melt the plastic more carefully and improve the uniformity of the final molten plastic. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an axonometric view of an embodiment of the rapid hot melting equipment for plastic recycling.

[0020] Figure 2 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling.

[0021] Figure 3 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling.

[0022] Figure 4 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling.

[0023] Figure 5 Front view of one embodiment of the rapid hot melting equipment for plastic recycling.

[0024] Figure 6 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Figure 4 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling.

[0025] Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Figure 7 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling.

[0026] Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Figure 8 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling.

[0027] Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Figure 9 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling.

[0028] Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Figure 10 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Figure 9 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling.

[0029] Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Figure 11 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Figure 9 Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling. Structure diagram of one embodiment of the rapid hot melting equipment for plastic recycling.

[0030] In the figure: 1, base; 2, outer cylinder; 3, inner cylinder; 301, first through hole; 302, strip-shaped protruding part; 4, assembly ring; 5, driving motor; 6, bevel gear; 7, bevel gear ring; 8, transmission ring; 801, strip-shaped groove; 802, annular groove; 9, baffle; 901, second through hole; 10, box body; 1001, first conduit; 1002, second conduit; 11, feeding hopper; 12, control valve; 13, electromagnetic valve; 14, piston plate; 15, air cylinder; 16, vertical column; 17, arc-shaped arm; 1701, roller; 18, vertical arm; 19, inclined block; 20, guide column; 2001, circular table; 21, spring; 22, sliding plate; 2201, column body; 23, sliding block; 24, driven block; 2401, inclined through groove. DETAILED DESCRIPTION

[0031] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0032] In addition, the elements in the present application are referred to as "fixed to" or "provided on" another element, which can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0033] Please refer to Figures 1-11 In the embodiments of the present application, a rapid hot melting equipment for plastic recycling includes a base 1, further comprising: an outer cylinder 2, an inner cylinder 3, the outer cylinder 2 is fixed on the base 1, the inner cylinder 3 is movably arranged in the inner part of the outer cylinder 2, the cylinder walls of both are heated by electricity, a gap is reserved between the inner wall of the outer cylinder 2 and the outer wall of the inner cylinder 3, forming a heating gap; wherein a plurality of rows of first openings 301 are arranged on the inner cylinder 3 along the circumference at equal intervals and distributed along the axial direction of the inner cylinder 3, and a control mechanism for switching the first opening 301 from the open state to the closed state is arranged on the inner cylinder 3; the outer cylinder 2 is further provided with a pump gas mechanism connected to the control mechanism, when the first opening 301 is in the closed state, the pump gas mechanism pumps gas into the inner cylinder 3, so that a pressure difference is formed between the inner cylinder 3 and the heating gap, so that after the first opening 301 is opened, the molten plastic in the inner cylinder 3 can enter the heating gap through the first opening 301.

[0034] It should be noted that the top of the outer cylinder 2 is provided with a feeding hopper 11, during operation, the plastic to be melted is put into the inner cylinder 3 through the feeding hopper 11, and the feeding hopper 11 is provided with a solenoid valve 13, after the feeding is completed, the solenoid valve 13 blocks the feeding hopper 11 to avoid heat loss during the hot melting process.

[0035] Secondly, the bottom outlet of the outer cylinder 2 is provided with a control valve 12, after the hot melting is completed, the control valve 12 is opened, so that the molten plastic at the bottom of the outer cylinder 2 (the molten plastic enters the heating gap through the first opening 301 from the inner cylinder 3, and then falls to the bottom of the outer cylinder 2 for temporary storage) enters the next processing flow through the heat preservation pipe.

[0036] Specifically, whenever the plastic is heated for a period of time, the air pumping mechanism works, first air is pumped into the inner cylinder 3, at this time, the first through port 301 is in a blocking state, so that there is a pressure difference between the inner cylinder 3 and the heating gap, then the control mechanism switches the blocking state of the first through port 301 to an open state, so that the plastic in the inner cylinder 3 that has been heated to a molten state can overflow into the heating gap through the first through port 301 under the action of the pressure difference.

[0037] The present application forms a double-layer heating structure by arranging the outer cylinder 2 and the inner cylinder 3, the inner cylinder 3 being located in the outer cylinder 2, and reserving a gap between the inner wall of the outer cylinder 2 and the outer wall of the inner cylinder 3 to form a heating gap. During the hot melting process, the air pumping mechanism can first pump air into the inner cylinder 3 when the first through port 301 is in a blocking state, so that there is a pressure difference between the inner cylinder 3 and the heating gap. After the first through port 301 is opened, the plastic in the inner cylinder 3 that has been heated to a molten state is caused to overflow through the first through port 301 by the pressure difference. Therefore, the function of guiding and separating the molten plastic during the hot melting process is realized, the hot melting burden in the inner cylinder 3 is effectively alleviated, and the problem that too much molten plastic in the inner cylinder 3 occupies heat energy, thereby adversely affecting the efficient melting of the un-melted plastic, is avoided.

[0038] It should be noted that after the first through port 301 is opened, part of the plastic in the inner cylinder 3 that has not completely melted but has been melted enough to pass through the first through port 301 will also enter the heating gap. However, since the heating gap is relatively narrow, the heat in the heating gap is more concentrated. This part of the plastic that has not completely melted but has been melted enough to pass through the first through port 301 will quickly and completely melt in the heating gap and finally fall into the bottom space of the outer cylinder 2 for temporary storage.

[0039] Please refer again to Figure 7 and Figure 10 The inner wall of the outer cylinder 2 is fixed with an assembly ring 4, the inner cylinder 3 is in sealing rotary connection with the assembly ring 4, a driving motor 5 is installed on the outer cylinder 2, the output shaft of the driving motor 5 extends into the heating gap and is fixed at the end with a bevel gear 6, and the bevel gear 6 is in meshing engagement with a bevel gear ring 7 fixed on the inner cylinder 3.

[0040] In operation, whenever the first through port 301 is opened, the driving motor 5 operates, the output shaft thereof drives the inner cylinder 3 to rotate on the assembly ring 4 through the bevel gear 6 and the bevel gear ring 7, and under the combined action of the centrifugal force and the pressure difference, the molten plastic in the inner cylinder 3 can be efficiently guided and separated.

[0041] Please refer again to Figure 9 and Figure 10The air pumping mechanism includes a box body 10 fixed on the outer tube 2, the bottom of the box body 10 is conductive, and a piston plate 14 is provided inside for sealing and sliding. Two cylinders 15 are fixed on the base 1, and the movable ends of the two cylinders 15 are fixed to the piston plate 14; the box body 10 is connected to the heating slit and the inner tube 3 through an air guide tube group, and the piston plate 14 is connected to the control mechanism.

[0042] It should be noted that the box body 10 is in close contact with the heating surface of the outer tube 2. In this way, the gas in the box body 10 to be pumped into the inner tube 3 can have a sufficient temperature, thereby avoiding the low temperature of the pumped gas and reducing the heat energy in the inner tube 3.

[0043] The air duct assembly includes a first conduit 1001 and a second conduit 1002 provided on the box body 10. The first conduit 1001 is connected to the inner cylinder 3, and the second conduit 1002 is connected to the heating slit. A first one-way valve and a second one-way valve are installed on the first conduit 1001 and the second conduit 1002 respectively.

[0044] After the molten plastic is put into the inner cylinder 3 and heated for a period of time, the cylinder 15 drives the piston plate 14 to slide upward in the box body 10. During this process, the first one-way valve is conductive and the second one-way valve is not conductive. As a result, the hot air in the box body 10 is pumped into the inner cylinder 3 through the first conduit 1001, so that a sufficient pressure difference is generated between the inner cylinder 3 and the heating slit.

[0045] After the first port 301 is opened and the molten plastic in the inner cylinder 3 overflows into the heating slit, the cylinder 15 drives the piston plate 14 to slide downward and reset in the box body 10. During this process, the first one-way valve is closed and the second one-way valve is opened, so that part of the gas in the heating slit is sucked into the box body 10 for storage.

[0046] Please refer again Figure 8 and Figure 9 The control mechanism includes a transmission ring 8 provided on the outer wall of the inner cylinder 3 and capable of sliding axially along the inner cylinder 3. The transmission ring 8 is fixedly connected to a plurality of baffles 9 equidistantly distributed along the circumference. The baffles 9 are equidistantly provided with a plurality of second openings 901 adapted to the first openings 301; the baffles 9 are in sealing and sliding engagement with the outer wall of the inner cylinder 3. A transmission structure is provided between the transmission ring 8 and the piston plate 14. The transmission structure can drive the transmission ring 8 to drive the baffles 9 to slide relative to the inner cylinder 3, so that the first openings 301 and the second openings 901 are misaligned or overlapped.

[0047] Further, in the latter stroke of the piston plate 14 sliding upward in the box 10, the transmission structure triggers, and then the transmission structure drives the transmission ring 8 to drive the baffle 9 to slide relative to the inner cylinder 3, i.e. the transmission ring 8 slides downward relative to the inner cylinder 3, so that the dislocation state of the first through hole 301 and the second through hole 901 switches to the coincidence state, so that the first through hole 301 is turned on, and under the joint action of pressure difference and centrifugal force, the molten plastic in the inner cylinder 3 can be guided out of the separation through the first through hole 301, relieving the burden of the inner cylinder 3, avoiding excessive molten plastic in the inner cylinder 3 occupying heat energy, and improving the efficiency of the entire plastic hot melting treatment.

[0048] Further, a plurality of strip-shaped protruding parts 302 are formed on the outer wall of the inner cylinder 3, and the inner wall of the transmission ring 8 is provided with a strip-shaped groove 801, which is matched with the strip-shaped protruding part 302, and both are parallel to the center axis of the inner cylinder 3. The strip-shaped protruding part 302 and the strip-shaped groove 801 are provided to guide the transmission ring 8.

[0049] Please refer to Figure 6 , Figure 7 , Figure 10 and Figure 11 , the transmission structure includes a follower connected with the piston plate 14, a driven part provided on the outer cylinder 2 and matched with the follower, and a sliding matching part connecting the driven part and the transmission ring 8. The follower includes a stand 16 fixedly connected with the piston plate 14 and an arc-shaped arm 17 fixedly connected with the end of the stand 16 away from the piston plate 14, and the arc-shaped arm 17 is provided with a roller 1701 at the end away from the stand 16; the roller 1701 can drive the driven part to move along the radial direction of the outer cylinder 2, so that the driven part drives the sliding matching part to drive the transmission ring 8 to slide relative to the inner cylinder 3.

[0050] The follower comprises two guide columns 20 fixed on the outer wall of the outer cylinder 2 and a vertical arm 18 in sliding connection with the two guide columns 20, the outer periphery of the guide column 20 is sleeved with a spring 21, one end of the spring 21 is connected with the outer wall of the outer cylinder 2 and the other end is connected with a circular truncated cone 2001 fixed on the end of the guide column 20 away from the outer cylinder 2, the roller 1701 is in abutment with the vertical arm 18, and an inclined block 19 cooperating with the roller 1701 is fixed on the vertical arm 18, the outer wall of the transmission ring 8 is provided with an annular groove 802, the sliding fitting part comprises a sliding block 23 slidingly fitted in the annular groove 802, the sliding block 23 is fixedly connected with two driven blocks 24, the driven block 24 is provided with an inclined through groove 2401, the outer cylinder 2 is further provided with a sliding plate 22 in sealing sliding connection with the vertical arm 18, and a column body 2201 is fixed on the end of the sliding plate 22 away from the vertical arm 18, the column body 2201 penetrates through the inclined through groove 2401 and is in sliding connection with the driven block 24.

[0051] During the upward sliding of the piston plate 14 in the box body 10, the vertical column 16, the arc-shaped arm 17 and the roller 1701 move along with the piston plate 14, correspondingly, the roller 1701 rolls upward along the vertical arm 18, during the latter stroke of the piston plate 14, the roller 1701 will act on the inclined surface of the inclined block 19, so that the inclined block 19 drives the vertical arm 18 to give way, the vertical arm 18 slides on the two guide columns 20 and approaches the outer cylinder 2, the spring 21 is compressed, at the same time, the sliding plate 22 slides towards the heating slit, the column body 2201 is in sliding connection with the driven block 24 through the inclined through groove 2401, the driven block 24 drives the transmission ring 8 to slide downward relative to the inner cylinder 3 through the sliding block 23, the dislocation state of the first through port 301 and the second through port 901 is switched to the coincident state, so that the first through port 301 is conducted, which facilitates the discharge of the hot melt plastic in the inner cylinder 3 and reduces the burden of the hot melt in the inner cylinder 3.

[0052] On the contrary, during the downward sliding of the piston plate 14, the roller 1701 is first separated from the inclined block 19, with the rebound of the spring 21, each component is reset, the coincident state of the first through port 301 and the second through port 901 is switched to the dislocation state, so that the first through port 301 is re-sealed.

[0053] As another embodiment of the present application, a rapid hot melting method for plastic recycling is also provided, the hot melting equipment is used, and the plastic to be melted is put into the inner cylinder 3 for heating and melting during the hot melting treatment.

[0054] When the first through-port 301 is in the closed state, the pumping mechanism pumps air into the inner cylinder 3, so that a pressure difference is formed between the inner cylinder 3 and the heating slit. Then, the first through-port 301 is opened, so that the plastic in the inner cylinder 3, which has been heated to a molten state, can overflow into the heating slit through the first through-port 301, be guided out of the separation, and fall into the bottom of the outer cylinder 2 through the heating slit.

[0055] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and it is intended that all changes and modifications which come within the meaning and range of equivalency of the claims are resolutely intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned to the features indicated by such reference signs.

[0056] Furthermore, it should be understood that although the present specification describes only a single independent technical solution for each embodiment, the specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art. Thus, the scope of the application is defined by the appended claims rather than by the foregoing description, and it is intended that all changes and modifications which come within the meaning and range of equivalency of the claims are resolutely intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned to the features indicated by such reference signs.

Claims

1. A rapid hot melt device for plastic recycling, comprising a base; It is characterized by: Also includes: The outer cylinder is fixed on the base, and the inner cylinder is movably arranged inside the outer cylinder. The cylinder walls of both cylinders are electrically heated, and a gap is reserved between the inner wall of the outer cylinder and the outer wall of the inner cylinder to form a heating slit. The inner cylinder is provided with a plurality of rows of first openings equidistantly distributed along the circumference and axial direction of the inner cylinder, and a control mechanism for switching the first openings between the open and closed states is provided on the inner cylinder; The outer cylinder is also provided with an air pumping mechanism connected to the control mechanism. When the first opening is in a blocked state, the air pumping mechanism pumps air into the inner cylinder, creating a pressure difference between the inner cylinder and the heating slit. When the first opening is opened, the molten plastic in the inner cylinder can enter the heating slit through the first opening. The pumping mechanism includes a box body fixed on the outer cylinder, the bottom of the box body is open, and a piston plate is provided inside the box body in a sealed and sliding manner. Two cylinders are fixed on the base, and the movable ends of the two cylinders are fixed to the piston plate. Wherein, the box body is connected to the heating slit and the inner cylinder through an air guide tube group, and the piston plate is connected to the control mechanism; The control mechanism includes a transmission ring provided on the outer wall of the inner cylinder and capable of sliding along the axial direction of the inner cylinder, the transmission ring being fixedly connected to a plurality of baffles distributed equidistantly along the circumference, and the baffles being provided with a plurality of second openings adapted to the first openings at equal intervals; The baffle is in sealing and sliding contact with the outer wall of the inner tube, and a transmission structure is provided between the transmission ring and the piston plate. The transmission structure can drive the transmission ring to drive the baffle and the inner tube to slide relative to each other, so that the first opening and the second opening are misaligned or overlapped.

2. A rapid hot melt equipment for plastic recycling according to claim 1, characterized in that: An assembly ring is fixed on the inner wall of the outer cylinder, and the inner cylinder is sealed and rotatably connected to the assembly ring. A drive motor is installed on the outer cylinder, and the output shaft of the drive motor extends into the heating slit, and a bevel gear is fixed at the end, and the bevel gear is engaged with the bevel gear ring fixed on the inner cylinder.

3. A rapid hot melt equipment for plastic recycling according to claim 1, characterized in that: The air guide tube assembly includes a first conduit and a second conduit provided on the box body, the first conduit communicates with the inner cylinder, the second conduit communicates with the heating slit, and a first one-way valve and a second one-way valve are installed on the first conduit and the second conduit respectively.

4. A rapid hot melt equipment for plastic recycling according to claim 1, characterized in that: The transmission structure includes a follower connected to the piston plate, a driven member provided on the outer cylinder and matched with the follower, and a sliding matching member connecting the driven member and the transmission ring.

5. A rapid hot melt equipment for plastic recycling according to claim 4, characterized in that: The follower comprises a column fixedly connected to the piston plate and an arc-shaped arm fixedly connected to one end of the column away from the piston plate, wherein a roller is mounted on the end of the arc-shaped arm away from the column; The roller can cause the driven member to move in the radial direction of the outer cylinder, so that the driven member causes the sliding fitting member to drive the transmission ring and the inner cylinder to slide relative to each other.

6. A rapid hot melt equipment for plastic recycling according to claim 5, characterized in that: The driven member includes two guide posts fixed to the outer wall of the outer cylinder and a vertical arm slidably connected to the two guide posts. A spring is sleeved on the outer circumference of the guide post. One end of the spring is connected to the outer wall of the outer cylinder, and the other end is connected to a truncated cone fixed to the end of the guide post away from the outer cylinder. The roller is in contact with the vertical arm, and an oblique block cooperating with the roller is fixed on the vertical arm.

7. A rapid hot melt equipment for plastic recycling according to claim 6, characterized in that: The outer wall of the transmission ring is provided with an annular groove, and the sliding fitting includes a slider slidably embedded in the annular groove, and the slider is fixedly connected to two driven blocks, and the driven blocks are provided with an inclined through groove. The outer cylinder is also provided with a sliding plate fixed to the vertical arm in a sealed sliding manner, and a column is fixed to the end of the sliding plate away from the vertical arm, and the column passes through the inclined through groove and is slidably connected to the driven block.

8. A rapid hot melt method for plastic recycling, using the hot melt equipment according to claim 1, characterized in that: During the hot melt treatment, the plastic to be melted is put into the inner cylinder and heated and melted; Under the premise that the first opening is in a blocked state, the air pumping mechanism pumps air into the inner tube, causing a pressure difference between the inner tube and the heating slit. Subsequently, the first opening is opened, allowing the plastic in the inner tube that has been heated to a molten state to overflow into the heating slit through the first opening, be guided out and separated, and fall to the bottom of the outer tube through the heating slit for temporary storage.

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