Flame-retardant plastic edge material recovery extruder and anti-blocking method thereof

Abstract

The present application belongs to the technical field of recycling and molding of flame-retardant plastics, and particularly relates to a flame-retardant plastic edge material recycling extruder and an anti-adhesion method thereof. The extruder comprises a molding cabin, a feeding hopper, a perforated box head for extruding molten plastics in a linear shape, a screw rod arranged at one end of the molding cabin away from the perforated box head, and a driving mechanism for rotating the screw rod. The extruder further comprises a cooling water tank, a clamp, and a sliding material table. The cooling water tank is arranged in a zigzag shape at a side of the molding cabin away from the driving mechanism. A water flushing mechanism is installed outside the cooling water tank. A guide roller mechanism is installed at the top of the cooling water tank. The clamp is used to pull the plastic thread through the guide roller mechanism. The method comprises steps one to five. The present application forms two water curtains by water spraying to limit and cool the plastic thread on both sides to prevent adhesion. The water flow sends the plastic thread into the clamp, avoiding the use of hands to take the plastic thread, and enabling the pulling and passing operation to be completed quickly.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of recycling and molding of flame-retardant plastics, and particularly relates to a flame-retardant plastic edge material recycling extruder and a method for preventing adhesion thereof. BACKGROUND

[0002] Plastic recycling can reduce the demand for raw materials and reduce the consumption of non-renewable resources such as petroleum. Among them, flame-retardant plastics are added with various flame retardants such as bromine, phosphorus, nitrogen, etc. on the basis of traditional plastics, and its recycling is conducive to green environmental protection.

[0003] For the recycling work of flame-retardant plastics, first of all, the staff needs to collect waste flame-retardant plastics and classify them according to their types, colors, and degrees of pollution. The classified flame-retardant plastics are crushed into smaller particles or fragments for subsequent processing. At the same time, the crushed plastics are cleaned to remove stains, dust and other impurities attached to the surface.

[0004] In the extrusion process, the plastic line needs to pass through the water tank for cooling and molding, and the following problems exist:

[0005] 1. After the line head is extruded, the staff generally needs to wear gloves and use hands to clench and pull it, and put it into the water. The temperature of the line head is relatively high before it is put into the water, which can easily burn the hands and reduce the safety of the pulling operation.

[0006] 2. When the line head is pulled by a clamp, the clamp cannot comb the line head, causing the line head to be partially adhered, which needs to be cut off, thereby causing a heavy burden for the pulling operation of the line head and being not conducive to the quick completion of the pulling operation. SUMMARY

[0007] The purpose of the present application is to provide a flame-retardant plastic edge material recycling extruder and a method for preventing adhesion thereof. The water spray forms two water curtains on both sides of the plastic line head to limit and cool the plastic line head to prevent adhesion. The water flow sends the plastic line head into the clamp, avoiding the use of hands to take the plastic line head, and enabling the quick completion of the pulling operation.

[0008] The technical solutions adopted by the present application are as follows:

[0009] A flame-retardant plastic edge material recycling extruder, comprising a molding cabin, a feeding hopper and a perforated box head for extruding molten plastic in a line shape, wherein one end of the molding cabin away from the perforated box head is provided with a screw rod and a driving mechanism for rotating the screw rod, and further comprising:

[0010] A cooling water tank, which is arranged in a zigzag shape on one side of the molding cabin away from the driving mechanism, and a water flushing mechanism is installed outside the cooling water tank, and a guide roller mechanism is installed on the top of the cooling water tank;

[0011] The clip is used to pull the plastic thread through the guide roller mechanism, the male and female clamping plates are respectively slidably installed on both sides of the clip, the wire arranging needle and the limiting concave block are arranged in a staggered manner between the outer side of the male clamping plate and the outer side of the female clamping plate, when the molten plastic is extruded, the wire arranging needle and the limiting concave block are used to hold the multiple plastic threads, so that the plastic threads are not taken by hand, and the wire arranging needle and the limiting concave block are separated to take out the multiple plastic threads at one time.

[0012] The sliding material table is arranged on one side of the hole box head and is used to hang the clip, the top of the sliding material table is provided with an arc-shaped sliding channel, water leakage holes located on both sides of the arc-shaped sliding channel and a filter screen installed in the water leakage holes, at the same time, water is sprayed to the water leakage holes by the flushing mechanism to form a water curtain to limit and cool the plastic threads, so that the multiple plastic threads are separated along the inclined and distributed arc-shaped sliding channel, and the water flow sends the plastic threads into the wire arranging needle and the limiting concave block.

[0013] As an optional solution, the bottom edge of the sliding material table is fixed with a ring-shaped supporting piece staggered with the water leakage holes, a bolt connected with the side edge of the clip is inserted into the ring-shaped supporting piece, when the ring-shaped supporting piece and the bolt are combined, the clip is hung, and when the ring-shaped supporting piece and the bolt are separated, the clip is manually operated to pull the multiple plastic threads through the guide roller mechanism.

[0014] As an optional solution, the clip includes a T-shaped handle and a hollow frame, the T-shaped handle includes an integrated horizontal handle and a vertical blocking handle, a guide hole is formed in the vertical blocking handle, the guide hole is used for sliding of the male and female clamping plates, and the limiting concave block passes through a part of the hollow frame to separate the multiple plastic threads.

[0015] As an optional solution, the first elastic member is fixed to the arc surface of the wire arranging needle close to the limiting concave block, and the second elastic member is fixed to the arc surface of the limiting concave block close to the wire arranging needle.

[0016] As an optional solution, the flushing mechanism includes a first water pump and a second water pump, the water inlet of the first water pump and the water inlet of the second water pump are both provided with a cooling water pipe in communication with one end of the cooling water tank, the other end of the cooling water tank is inclined, and the other end of the cooling water tank is provided with a water distribution channel in communication with the output end of the first water pump.

[0017] As an optional solution, the hole box head is provided with a transfer water tank for spraying water to the water leakage holes and a water distribution square pipe in communication with the bottom of the transfer water tank, and a water conveying pipe is in communication between one side of the transfer water tank and the output end of the second water pump.

[0018] As an alternative, the guide roller mechanism comprises a cantilever roller rotatably mounted on the top of the cooling water tank, a submerged roller rotatably mounted inside the cooling water tank, and a guide wheel rotatably mounted on the outer surface of the cantilever roller, through which the plastic thread is sequentially wound around the submerged roller, the cantilever roller, and the guide wheel when the plastic thread is pulled.

[0019] As an alternative, one end of the male clamp plate inserted into the guide hole is fixed with a first pressing handle, and one end of the female clamp plate inserted into the guide hole is fixed with a second pressing handle.

[0020] As an alternative, the drive mechanism comprises a speed reducer connected to one end of the screw rod, a power distribution cabinet mounted at the bottom of the speed reducer, a belt pulley set electrically connected to the power distribution cabinet and drivingly connected to the outside of the speed reducer, and a heat dissipation fan electrically connected to the power distribution cabinet and mounted inside the forming cabin.

[0021] A method for preventing adhesion of flame-retardant plastic edge material recovery extruder, comprising the following steps:

[0022] Step one, feeding: the recycled flame-retardant plastic edge material is put into an electric melting furnace to be melted, the molten plastic is sent into the forming cabin through the feed hopper, and the molten plastic is extruded from the holes of the hole box head in a linear shape by rotating the screw rod in the forming cabin through the drive mechanism.

[0023] Step two, separate the thread: start the water flushing mechanism to spray water towards the water leakage hole, form two water curtains on both sides of the plastic thread to limit and cool the plastic thread, and the filter screen vertically supports the plastic thread and leaks water flow, so that the multiple plastic threads are separated along the inclined distribution arc-shaped slide, and the water flow sends the plastic thread into the space between the wire arranging needle head and the limiting concave block, so as to comb the plastic thread in the cooling water environment to prevent adhesion.

[0024] Step three, clamping the thread: by pressing the male clamp plate outside and the female clamp plate close to the clamp with hands, the wire arranging needle head and the limiting concave block are clamped to the multiple plastic threads, until the wire arranging needle head and the limiting concave block are clamped to each other, the thread is locked, and the plastic thread is prevented from being taken by hand.

[0025] Step four, threading the thread: the clamp is pulled by hand to guide the plastic thread to dive into the cooling water through the guide roller mechanism, and the water flow is transversely divided by the water flushing mechanism to spray water towards the top of the cooling water tank, so that the multiple plastic threads are in contact with the cooling water, and their heat is taken away by the cooling water to be quickly cooled.

[0026] Step five, thread disengagement: the plastic thread is pulled out of the cooling water from the top of the cooling water tank, the clamp is operated by hand to separate the wire arranging needle head and the limiting concave block, so as to take out the multiple plastic threads at one time, and the plastic thread is pulled into the rotary cutter by hand, and the plastic thread is cut off by the rotary blade.

[0027] The technical effects achieved by the present application are as follows:

[0028] The present application adopts a sliding material table to guide the plastic thread to slide downward, and can also be used for hanging a clamp. The clamp is mainly guided by a water flushing mechanism to spray water towards a water leakage hole to form two water curtains to limit and cool the plastic thread on both sides of the plastic thread. The filter screen can vertically support the plastic thread and leak water flow, so that multiple plastic threads are separated along the inclined distribution arc-shaped slide. The water flow sends the plastic thread into the pin head of the clamp and the limiting concave block, so as to comb the plastic thread in the cooling water environment to prevent adhesion. At the same time, the male clamp plate and the female clamp plate are pressed by hands to drive the pin head and the limiting concave block to clamp the multiple plastic threads, so as to avoid taking the plastic thread by hand. Then the clamp is pulled to pass through the cooling water tank, so that the pulling and passing operation can be quickly completed.

[0029] When the annular support and the bolt are inserted, the present application is used for hanging the clamp. When the plastic thread is sent into the clamp, the clamp needs to be lifted by hand to pull and pass the plastic thread. When the annular support and the bolt are separated, the clamp is operated by hand to pull and pass the multiple plastic threads through the guide roller mechanism.

[0030] The first elastic member and the second elastic member made of silica gel are selected in the present application. In particular, the arc surface of the first elastic member and the arc surface of the second elastic member can push the plastic thread to the center. When the two contact the plastic thread, they can buffer through their own deformation, so as not to excessively press the plastic thread. In addition, the first elastic member and the second elastic member have good performance in clamping the plastic thread with the female clamp plate and the male clamp plate, and can be suitable for plastic threads with different melting points.

[0031] The present application gives standardized operation steps through steps one to five. Before the plastic thread is cut into particles, the plastic thread is cooled by spraying water, and the cooling water is used to flush the water curtain to separate the plastic thread as much as possible to reduce the waste caused by adhesion. Then the plastic thread is sent into the clamp to reduce the pulling work burden of the thread extrusion. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a front view of a flame-retardant plastic edge material recycling extruder in embodiment one of the present application;

[0033] Figure 2 is a bottom view of a hole box head in embodiment one of the present application;

[0034] Figure 3 is a front view of a screw in embodiment one of the present application;

[0035] Figure 4 is a side view of a clamp in embodiment one of the present application;

[0036] Figure 5 is a rear view of a clamp in embodiment one of the present application;

[0037] Figure 6 is a side view of the material sliding table in the first embodiment of the present application;

[0038] Figure 7 is a front view of the first water pump in the first embodiment of the present application;

[0039] Figure 8 is a front view of the second water pump in the first embodiment of the present application;

[0040] Figure 9 is a front view of the transfer water tank in the first embodiment of the present application;

[0041] Figure 10 is a front view of the collimating barrel in the first embodiment of the present application;

[0042] Figure 11 is a system block diagram of the controller in the first embodiment of the present application;

[0043] Figure 12 is a flow chart of the anti-adhesion method in the second embodiment of the present application.

[0044] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0045] 1, molding cabin; 101, feeding hopper; 102, collimating barrel; 103, cooling mold box; 2, perforated box head; 3, screw; 4, cooling water tank; 5, clamp; 501, male clamp plate; 5011, first pressing handle; 502, female clamp plate; 5021, second pressing handle; 503, wire arranging needle head; 5031, first elastic member; 504, limiting concave block; 5041, second elastic member; 505, T-shaped handle; 5051, guide hole; 506, hollow frame; 6, material sliding table; 601, arc-shaped sliding channel; 602, water leakage hole; 603, filter screen; 604, annular supporting member; 605, bolt; 701, first water pump; 702, second water pump; 703, cooling water pipe; 704, water distribution channel; 705, transfer water tank; 706, water distribution square pipe; 707, water delivery pipe; 801, submerged roller; 802, suspended roller; 803, cantilever roller; 804, guide wheel; 9, speed reducer; 10, power distribution cabinet; 11, pulley set; 12, heat dissipation fan. DETAILED DESCRIPTION

[0046] In order to make the objects and advantages of the present application clearer, the present application is specifically described below in conjunction with embodiments. It should be understood that the following description is merely used to describe one or several specific embodiments of the present application, and does not strictly limit the scope of protection of the present application.

[0047] Plastic recycling can reduce the demand for raw materials, reduce the consumption of non-renewable resources such as petroleum. When the flame-retardant plastic is used, it is usually cut or die-cut, leaving a certain amount of waste edge material that cannot be put into production. The purpose of the present application is to recycle this part of the edge material and reuse it after processing. After recycling these edge materials to the site, the staff classifies them according to their types, colors, contamination levels, etc. The classified flame-retardant plastics are crushed, usually crushed into smaller particles or fragments, to facilitate subsequent processing. At the same time, the crushed flame-retardant plastics are washed to remove stains, dust and other impurities attached to the surface.

[0048] Because the crushed flame-retardant plastic still has a certain hardness and cannot be directly extruded, it is usually put into an electric melting furnace, then poured into an extruder and extruded.

[0049] Example one:

[0050] As shown in Figures 1-11 , a flame-retardant plastic edge material recycling extruder, the entire extruder is controlled by a controller, which can be an industrial computer, a single-chip microcomputer, etc., including a molding cabin 1, a feed hopper 101, and a perforated box head 2 for extruding molten plastic in a linear shape. During operation, the molten plastic is guided by a flow guide pipe and sent into the molding cabin 1 through the feed hopper 101. The molten plastic is extruded in a linear shape from the holes of the perforated box head 2 by rotating the screw 3 provided at the end of the molding cabin 1 away from the perforated box head 2, as shown in Figure 3 , along the axial direction of the screw 3 in the molding cabin 1. As shown in Figure 2 , five holes are selected to be opened as an example, but the actual production process is not limited to five holes. The producer can increase the number of holes according to their own needs to improve productivity.

[0051] Referring to the accompanying Figure 1 , Figure 10 and Figure 11 , in order to automatically rotate the screw 3, the screw 3 is connected to a speed reducer 9 at one end, and a belt pulley machine set 11 is drivingly connected to the outside of the speed reducer 9. The belt pulley machine set 11 is electrically connected to the controller by a relay, and the power supply is provided by the power distribution cabinet 10 installed at the bottom of the speed reducer 9. The motor of the belt pulley machine set 11 drives the belt at a low speed by the speed reducer 9, which drives the screw 3 to rotate at a low speed. The screw 3 pushes and extrudes the molten plastic in the collimating barrel 102. A cooling type box 103 is also installed inside the molding cabin 1 and is in electrical connection with the power distribution cabinet 10. A cooling fan 12 is in communication with the cooling type box 103. Since the cooling fan 12 is electrically connected to the controller, the cooling fan 12 blows cold air towards the cooling type box 103 after starting, which facilitates the removal of heat from the collimating barrel 102 and prevents overheating inside the molding cabin 1.

[0052] However, even if the speed reducer 9 can reduce the rotation speed of the screw rod 3 through the transmission ratio, the plastic thread sprayed from the hole of the hole box head 2 will still be scattered under the thrust, and the five plastic threads themselves have a certain viscosity and will be adhered to each other after contact. Generally, the adhered part needs to be cut off, resulting in waste.

[0053] Referring to the drawings Figure 1 and Figure 6 In order to reduce the plastic thread adhesion part, the cooling water tank 4 is arranged in a zigzag shape on the side of the forming cabin 1 away from the driving mechanism, so that the cooling water can soak the plastic thread. A water flushing mechanism is installed outside the cooling water tank 4, and a guide roller mechanism is installed on the top of the cooling water tank 4 to pass through the plastic thread and straighten it, so that the water flushing mechanism can not mess up the plastic thread when spraying water to impact the plastic thread.

[0054] Referring to the drawings Figure 1 , Figure 4 and Figure 5 When extruded, the plastic thread has a high temperature and can be scalded by directly grabbing it with hands. Therefore, the clip 5 is arranged to pull the plastic thread to pass through the guide roller mechanism. Male clamping plates 501 and female clamping plates 502 are respectively slidably installed on both sides of the clip 5. Since the line pin 503 and the limiting concave block 504 are arranged in a staggered manner between the outer side of the male clamping plate 501 and the outer side of the female clamping plate 502, when the molten plastic is extruded, the outer side of the male clamping plate 501 and the female clamping plate 502 are pressed by hands to approach the clip 5, driving the line pin 503 and the limiting concave block 504 to bite the multiple plastic threads, avoiding taking the plastic thread with hands, and then pulling the clip 5 to pass through the cooling water tank 4;

[0055] Further, five line pins 503 are spaced apart and welded on the outer side of the male clamping plate 501, and five limiting concave blocks 504 are spaced apart and welded on the outer side of the female clamping plate 502. Thus, corresponding to the five plastic threads, if the number of plastic threads is increased, the number of line pins 503 and limiting concave blocks 504 needs to be increased to adapt to the production rhythm;

[0056] Further, the clip 5 of the embodiment comprises a T-shaped handle 505 and a hollow frame 506, the T-shaped handle 505 comprises an integrated horizontal handle and a vertical handle, and a guide hole 5051 is formed on the vertical handle, wherein the horizontal handle is convenient for holding by hand, the vertical handle can separate the hand and the plastic wire end, and the guide hole 5051 is used for sliding of the male clamp plate 501 and the female clamp plate 502, in order to keep the male clamp plate 501 and the female clamp plate 502 in an open state, two spring telescopic tubes are additionally installed inside the guide hole 5051 for supporting the male clamp plate 501 and the female clamp plate 502 respectively, when the plastic wire end is clamped, the two spring telescopic tubes need to be compressed by the hand, so that the male clamp plate 501 and the female clamp plate 502 can slide along the edge hole of the guide hole 5051, drive the limiting concave block 504 to pass through the part of the hollow frame 506 to separate the multiple plastic wire ends, until the wire arranging needle 503 and the limiting concave block 504 are engaged with each other.

[0057] Referring to the drawings Figure 4 and Figure 5 In order to facilitate the operation of the clip 5, the first pressing handle 5011 is welded at one end of the male clamp plate 501 penetrating into the guide hole 5051, and the second pressing handle 5021 is welded at one end of the female clamp plate 502 penetrating into the guide hole 5051, so that the staff can drive the male clamp plate 501 and the female clamp plate 502 to approach each other by pressing the first pressing handle 5011 and the second pressing handle 5021 at a position away from the plastic wire end, to prevent being scalded by the plastic wire end.

[0058] Meanwhile, the first elastic member 5031 is bonded to the arc surface of the wire arranging needle 503 close to the limiting concave block 504, and the second elastic member 5041 is bonded to the arc surface of the limiting concave block 504 close to the wire arranging needle 503, and the first elastic member 5031 and the second elastic member 5041 can be made of silica gel material, and especially the arc surface of the first elastic member 5031 and the arc surface of the second elastic member 5041 can push the plastic wire end to the center.

[0059] Firstly, the melting point of ordinary silica gel is about 200℃, which is suitable for recycling of PVC (polyvinyl chloride, melting point is 120℃-150℃) edge material;

[0060] Secondly, the melting point of high-temperature silica gel is about 1500℃, which is suitable for edge material with the following materials:

[0061] PEEK (polyether ether ketone): melting point is 300℃;

[0062] ABS (acrylonitrile-butadiene-styrene copolymer): melting point is 191℃-316℃;

[0063] AS (styrene-acrylonitrile copolymer): melting point is 204℃-254℃;

[0064] PMMA (Poly (methyl methacrylate)), melting point 170-210°C.

[0065] Referring to the drawings Figure 1 , Figure 6 and Figure 9 , when the water is sprayed, the embodiment uses the sliding material table 6 to guide the plastic thread to slide down, the sliding material table 6 is arranged on one side of the hole box head 2, and can also be used for hanging the clip 5, and the arc-shaped slide 601 is arranged on the top of the sliding material table 6, the water leakage hole 602 is located on both sides of the arc-shaped slide 601, and the filter screen 603 is installed in the water leakage hole 602. Mainly through the water flushing mechanism, water is sprayed towards the water leakage hole 602, two water curtains are formed on both sides of the plastic thread to limit and cool the plastic thread, and the filter screen 603 can vertically support the plastic thread and leak water flow, so that the multiple plastic threads are separated along the inclined distribution arc-shaped slide 601, and the water flow sends the plastic thread into the wire arranging needle head 503 and the limiting concave block 504, so as to comb the plastic thread in the cooling water environment to prevent adhesion, and the traction operation can be quickly completed.

[0066] Referring to the drawings Figure 7 , Figure 8 and Figure 11 , the water flushing mechanism used in the embodiment includes a first water pump 701 and a second water pump 702 which are electrically connected with the controller. First, sufficient cooling water is added in the cooling water tank 4, and the water inlet of the first water pump 701 and the water inlet of the second water pump 702 are both provided with a cooling water pipe 703 which is communicated with one end of the cooling water tank 4. Both of them can suck the cooling water in the cooling water tank 4 after being started. Since the other end of the cooling water tank 4 is inclined and the other end of the cooling water tank 4 is provided with a water distribution channel 704 which is communicated with the output end of the first water pump 701, the cooling water sucked by the first water pump 701 is sprayed towards the top of the cooling water tank 4 along the water distribution channel 704. In addition, the bottom surface of the water distribution channel 704 is provided with five shunt pipes which transversely shunt the water flow, so that the five plastic threads can all contact the cooling water.

[0067] Referring to the drawings Figure 1 , Figure 8 and Figure 9 , the embodiment is communicated with the water distribution pipe 707 between the transit water tank 705 on one side and the output end of the second water pump 702, so as to realize the nearby distribution of the cooling water in the cooling water tank 4, without the need to additionally supply water sources for the first water pump 701 and the second water pump 702. In addition, the transit water tank 705 for spraying water towards the water leakage hole 602 is arranged outside the hole box head 2, and the water distribution square pipe 706 is communicated with the bottom of the transit water tank 705. Since the water distribution square pipe 706 is downwardly aligned with the water leakage hole 602, water can be sprayed on both sides of each plastic thread to form a water curtain.

[0068] Referring to the drawings Figure 1To facilitate the smooth running of the multi-strand plastic line head, the guide roller mechanism of the embodiment includes a suspended roller 802 and a cantilever roller 803 rotatably mounted on the top of the cooling water tank 4 through a bearing seat, and a diving roller 801 rotatably mounted inside the cooling water tank 4 through a bearing seat. Since the outer surface of the cantilever roller 803 is rotatably mounted with a guide wheel 804, when the plastic line head is pulled, the plastic line head will pass through the diving roller 801, the suspended roller 802 and the guide wheel 804 in turn, and the number of diving rollers 801 can be set to two to guide the plastic line head to dive into the cooling water.

[0069] Referring to the drawings Figure 5 and Figure 6 , the embodiment is welded with an annular support 604 staggered with the water leakage hole 602 at the bottom edge of the sliding material table 6, and the annular support 604 is inserted with a bolt 605 connected to the side edge of the clip 5. When the annular support 604 and the bolt 605 are inserted, it is used to hang the clip 5, and when the plastic line head is sent into the clip 5, the clip 5 needs to be lifted by hand to pull the plastic line head through. When the annular support 604 and the bolt 605 are separated, the clip 5 is operated by hand to pull the multi-strand plastic line head through the guide roller mechanism.

[0070] Finally, the plastic line head is pulled out of the cooling water from the top of the cooling water tank 4, and the operator can operate the clip 5 to separate the wire arranging needle head 503 from the limiting concave block 504 to take out 5 plastic line heads at a time. Since the cooling water is cooled, these plastic line heads are not so hot and can be pulled into the rotary cutter by hand. The rotary blade is used to cut the plastic line.

[0071] Embodiment two:

[0072] The extrusion of flame-retardant plastic generally needs manual pulling of the plastic line head, which tests the operation experience of the staff. Once the operation is improper, the plastic joints will stick to each other, which needs to be cut off, causing waste. Therefore, based on embodiment one, the embodiment gives the standardized operation steps to minimize the waste caused by sticking.

[0073] As Figure 12 shown, a flame-retardant plastic edge material recycling extruder anti-sticking method, comprising the following steps:

[0074] Step one, feeding: the recycled flame-retardant plastic edge material is generally put into an electric melting furnace to melt, and the molten plastic is guided by a flow guide pipe and sent into a forming cabin 1 along a feeding hopper 101. By rotating the screw 3 provided at one end of the forming cabin 1 away from the perforated box head 2, as Figure 3 shown, the molten plastic can be extruded from the holes of the perforated box head 2 in a linear shape along the axial direction of the screw 3;

[0075] When recycling, these edge materials are recycled to the site, and the workers classify them according to their categories, colors, contamination levels, etc. The classified flame-retardant plastics are crushed, usually into smaller particles or fragments, to facilitate subsequent processing. At the same time, the crushed flame-retardant plastics are washed to remove stains, dust and other impurities attached to the surface;

[0076] In order to automatically rotate the screw 3, the power distribution cabinet 10 installed at the bottom of the speed reducer 9 is powered by the operation controller, so that the motor of the belt pulley set 11 drives the belt to rotate at a low speed through the speed reducer 9, driving the screw 3 to rotate at a low speed, and pushing the molten plastic in the collimating barrel 102. The cooling type box 103 is installed in the forming cabin 1 and is electrically connected with the power distribution cabinet 10 and the cooling fan 12. Since the cooling fan 12 is electrically connected to the controller, the cooling fan 12 blows cold air towards the cooling type box 103 after being started, which facilitates the removal of heat from the collimating barrel 102 and prevents overheating in the forming cabin 1;

[0077] Step two, separate the thread: start the second water pump 702 to suck cooling water. Since the water distribution square pipe 706 is downwardly aligned with the water leakage hole 602, two water curtains are formed on both sides of the plastic thread to limit and cool the plastic thread. The filter screen 603 can vertically support the plastic thread and leak water flow, so that multiple plastic threads are separated along the inclined distribution arc slide 601;

[0078] At the same time, the water flow sends the plastic thread into the wire arranging needle head 503 and the limiting concave block 504, so as to comb the plastic thread in the cooling water environment to prevent adhesion, and the traction operation can be quickly completed;

[0079] Step three, clamping the thread: press the male clamp plate 501 outside and the female clamp plate 502 close to the clamp 5 with hands, so as to drive the wire arranging needle head 503 and the limiting concave block 504 to clamp the multiple plastic threads, avoiding taking the plastic thread by hand;

[0080] In which, the male clamp plate 501 outside and the female clamp plate 502 drive the first elastic member 5031 and the second elastic member 5041 close to the thread, respectively. The arc surface of the first elastic member 5031 and the arc surface of the second elastic member 5041 can push the plastic thread to the center, until the wire arranging needle head 503 and the limiting concave block 504 are mutually clamped, and the thread is locked;

[0081] Step four, threading the line head: the hand pulls the clip 5, and the plastic line head is wound around the diving roller 801, the floating roller 802 and the guide wheel 804 in turn, and the number of diving rollers 801 can be set to two, which are used to guide the plastic line head to dive into the cooling water, and the cooling water sucked by the first water pump 701 sprays along the water distribution channel 704 towards the top of the cooling water tank 4, and in addition, the bottom surface of the water distribution channel 704 is penetrated by five shunt pipes, which transversely shunt the water flow, so that the five plastic line heads can contact the cooling water, and their heat is taken away by the cooling water, which can be quickly cooled and formed;

[0082] Step five, line head disengagement: the plastic line head passes out of the cooling water from the top of the cooling water tank 4, and the staff can operate the clip 5 to separate the line needle head 503 from the limiting concave block 504, so as to take down the five plastic line heads at one time, and since the cooling water is cooled, these plastic line heads are not so hot that they can be pulled into the rotary cutter by hand.

[0083] The above is only an optional embodiment of the present application, and it should be noted that for ordinary skilled persons in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered within the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, unless otherwise specified and limited.

Claims

1. A flame retardant plastic offcut recycling extruder comprising a forming chamber (1), a feed hopper (101) and a perforated box head (2) for extruding molten plastic in the form of a thread, said forming chamber (1) being provided at the end remote from the perforated box head (2) with a screw (3) and a drive mechanism for rotating said screw (3), characterised in that, Also include: Cooling water tank (4), the cooling water tank (4) is arranged in the shape of the forming cabin (1) away from the drive mechanism side, the cooling water tank (4) outside installation has a water flushing mechanism, the cooling water tank (4) top installation has a guide roller mechanism; Clamp (5), the clamp (5) is used for pulling plastic line head through the guide roller mechanism, the clamp (5) both sides are respectively slidably installed with male clamp plate (501) and female clamp plate (502), the male clamp plate (501) outside and the female clamp plate (502) outside are misalignedly provided with wire arranging needle (503) and limiting concave block (504), when extruding molten plastic, a plurality of plastic line heads are clamped by the wire arranging needle (503) and the limiting concave block (504), so as to avoid taking plastic line head by hand, and the wire arranging needle (503) and the limiting concave block (504) are separated, so as to take a plurality of plastic line heads at a time. Slide table (6), the slide table (6) is arranged on one side of the hole box head (2), and is used for hanging the clamp (5), the slide table (6) top is provided with arc-shaped slide (601), water leakage hole (602) located on both sides of the arc-shaped slide (601) and filter screen (603) installed in the water leakage hole (602), at the same time, water is sprayed to the water leakage hole (602) through the water flushing mechanism, a water curtain is formed to limit and cool the plastic line head, so that a plurality of plastic line heads are separated along the inclined distribution of the arc-shaped slide (601), and the water flow sends the plastic line heads into the wire arranging needle (503) and the limiting concave block (504). The bottom edge of the slide table (6) is fixed with annular support (604) staggered with the water leakage hole (602), the annular support (604) is inserted with bolt (605) connected with the side edge of the clamp (5), when the annular support (604) and the bolt (605) are inserted, the clamp (5) is used for hanging, when the annular support (604) and the bolt (605) are separated, the clamp (5) is operated by hand to pull a plurality of plastic line heads through the guide roller mechanism.

2. A flame retardant plastic offcut recycling extruder as claimed in claim 1, wherein: The clamp (5) includes T-shaped handle (505) and hollow frame (506), the T-shaped handle (505) includes integrated horizontal handle and vertical stop handle, and the vertical stop handle is provided with guide hole (5051), the guide hole (5051) is used for sliding of the male clamp plate (501) and the female clamp plate (502), and the limiting concave block (504) passes through part of the hollow frame (506), which is used for separating a plurality of plastic line heads.

3. A flame retardant plastic offcut recycling extruder as claimed in claim 1, wherein: The first elastic member (5031) is fixed on the arc surface of the wire arranging needle (503) close to the limiting concave block (504), and the second elastic member (5041) is fixed on the arc surface of the limiting concave block (504) close to the wire arranging needle (503).

4. A flame retardant plastic offcut recycling extruder as claimed in claim 1, wherein: The flushing mechanism comprises a first water pump (701) and a second water pump (702), the water inlet of the first water pump (701) and the water inlet of the second water pump (702) are both provided with a cooling water pipe (703) communicated with one end of the cooling water tank (4), the other end of the cooling water tank (4) is inclined, and the other end of the cooling water tank (4) is provided with a water distribution channel (704) communicated with the output end of the first water pump (701).

5. A flame retardant plastic offcut recycling extruder as claimed in claim 4, wherein: The outside of the hole box head (2) is provided with a transfer water tank (705) for spraying water towards the water leakage hole (602) and a water distribution square pipe (706) communicated with the bottom of the transfer water tank (705), and a water delivery pipe (707) is communicated between one side of the transfer water tank (705) and the output end of the second water pump (702).

6. A flame retardant plastic edge material recovery extruder according to claim 1, characterized in that: The guide roller mechanism comprises a suspended roller (802) and a cantilever roller (803) rotatably installed on the top of the cooling water tank (4), and a submerged roller (801) is rotatably installed in the cooling water tank (4), and a guide wheel (804) is rotatably installed on the outer surface of the cantilever roller (803), and when the plastic thread is pulled, the plastic thread is sequentially wound around the submerged roller (801), the suspended roller (802) and the guide wheel (804).

7. A flame retardant plastic offcut recycling extruder as claimed in claim 2, wherein: One end of the male clamp plate (501) penetrating into the guide hole (5051) is fixed with a first pressing handle (5011), and one end of the female clamp plate (502) penetrating into the guide hole (5051) is fixed with a second pressing handle (5021).

8. A flame retardant plastic offcut recycling extruder as claimed in claim 3, wherein: The driving mechanism comprises a speed reducer (9) connected with one end of the screw rod (3), the bottom of the speed reducer (9) is provided with a power distribution cabinet (10), the outer side of the speed reducer (9) is drivingly connected with a belt pulley machine set (11) electrically connected with the power distribution cabinet (10), and the inside of the forming cabin (1) is provided with a cooling fan (12) electrically connected with the power distribution cabinet (10).

9. A method for preventing blocking of a flame-retardant plastic edge material recycling extruder, applied to the flame-retardant plastic edge material recycling extruder according to any one of claims 1-8, characterized in that, The method comprises the following steps: Step one, feeding: the recycled flame-retardant plastic edge material is put into an electric melting furnace to be melted, the molten plastic is sent into the forming cabin (1) through the feed hopper (101), the driving mechanism rotates the screw rod (3) to extrude the molten plastic in the forming cabin (1), and the molten plastic is extruded in a thread shape from the holes of the hole box head (2); Step two, separating the thread: the flushing mechanism is started to spray water towards the water leakage hole (602), two water curtains are formed to limit the plastic thread on both sides and cool the plastic thread, the filter screen (603) vertically supports the plastic thread and leaks water flow, a plurality of plastic threads are separated along the inclined distribution arc-shaped slide (601), the water flow sends the plastic thread into the wire arranging needle head (503) and the limiting concave block (504) to comb the plastic thread in the cooling water environment to prevent adhesion; Step three, clamping the thread: the male clamp plate (501) and the female clamp plate (502) are pressed by hands to drive the wire arranging needle head (503) and the limiting concave block (504) to clamp the plurality of plastic threads, until the wire arranging needle head (503) and the limiting concave block (504) are engaged with each other to lock the thread, so that the plastic thread is avoided to be taken by hand. Step four, threading the line head: use your hand to pull the clip (5) to pass the plastic line head around the guide roller mechanism, which is used to guide the plastic line head to dive into the cooling water, and through the water flushing mechanism to spray towards the top of the cooling water tank (4), the water flow is divided horizontally, so that multiple plastic line heads are in contact with the cooling water, and their heat is taken away by the cooling water, and they are quickly cooled and formed; Step five, line head disengagement: the plastic line head is pulled out of the cooling water from the top of the cooling water tank (4), and the clip (5) is operated by hand to separate the line needle head (503) from the limiting concave block (504) to take out the multiple plastic line heads at one time, and pull them into the rotary cutter by hand.

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