High-temperature-resistant plastic product forming extruder

Abstract

The application discloses a high-temperature-resistant plastic product forming extruder and relates to the technical field of extruders.The high-temperature-resistant plastic product forming extruder comprises an equipment box, an extruding mechanism, and an exhaust mechanism.The extruding mechanism is installed on the equipment box.The extruding mechanism comprises a conveying pipe and a machine head.The exhaust mechanism comprises a transfer box which is connected between the conveying pipe and the machine head.The transfer box is connected with an agitator.The output end of the agitator extends into the interior of the transfer box.The first powder titanium sintering plate is fixedly connected to the top of the transfer box.The second powder titanium sintering plate is fixedly connected to the output end of the agitator.The plastic melt is stirred and vibrated, and the melt is pushed to move upwards, which is beneficial to the floating of the bubbles in the melt.The bubbles floated to the first powder titanium sintering plate are exhausted through the first exhaust assembly.Meanwhile, the second exhaust assembly is arranged on the stirring blade.The second exhaust assembly continuously sucks the bubbles in the melt near the stirring blade through negative pressure, so that the bubbles in the melt are reduced, and the quality of the plastic product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of extruders, in particular to a high-temperature-resistant plastic product forming extruder. BACKGROUND

[0002] An extruder is a device that shapes raw material particles into specific shaped products through heating and extrusion processes. A high-temperature-resistant plastic product forming extruder, which uses high-temperature-resistant plastic particles as raw material particles, is used to manufacture high-temperature-resistant plastic products. Air is often trapped in existing plastic particles, and some air remains inside melted plastic particles, which can leave air bubbles inside the plastic product after it cools and forms, affecting the quality of the plastic product.

[0003] In the prior art, a driving motor drives a spiral vertical rod and multiple stirring rods and side plates on the spiral vertical rod to rotate, which stirs the plastic melt to make the air bubbles in the melt float and expel the gas in the melt. In this way, when the high-temperature-resistant plastic melt is stirred and degassed, the viscosity of the high-temperature-resistant plastic melt is high, the moving resistance of the air bubbles is large, and some air bubbles may remain in the melt after stirring, affecting the quality of the plastic product. A powder sintered alloy block is used to cooperate with the degassing assembly to strongly suck the air inside the mold. In this way, the air inside the plastic melt cannot be effectively extracted, and it is not convenient to quickly change the negative pressure intensity through the stirrer, which reduces the suction effect of the air bubbles in the melt. SUMMARY

[0004] The purpose of the present application is to solve the problem in the prior art that the viscosity of the high-temperature-resistant plastic melt is high, the moving resistance of the air bubbles is large, and some air bubbles may remain in the melt after stirring, affecting the quality of the plastic product. A high-temperature-resistant plastic product forming extruder is proposed.

[0005] To achieve the above purpose, the present application adopts the following technical scheme: a high-temperature-resistant plastic product forming extruder, comprising a device box, further comprising:

[0006] An extruding mechanism is installed on the device box.

[0007] The exhaust mechanism includes a transfer box communicated between the conveying pipe and the machine head, a stirrer connected to the transfer box, the output end of the stirrer extending into the interior of the transfer box, a first powder titanium sintered plate fixedly connected to the top of the interior of the transfer box, a second powder titanium sintered plate fixedly connected to the output end of the stirrer, the bottom of the first powder titanium sintered plate communicated with the interior of the transfer box, and the top communicated with a first exhaust assembly, one end of the second powder titanium sintered plate communicated with the interior of the transfer box, and the other end communicated with a second exhaust assembly, the second exhaust assembly including a vacuum pump installed on the outside of the transfer box, the vacuum pump used for controlling the air pressure state in the second exhaust assembly.

[0008] In the above-mentioned high-temperature-resistant plastic product forming extruder, the extrusion mechanism includes a driving part installed on the equipment box, the driving part is fixedly connected with an outer box, the outer box is fixedly connected with a conveying pipe in the interior, the output end of the driving part is sealingly penetrated through the conveying pipe and coaxially fixedly connected with a spiral feeding rod, the spiral feeding rod is rotationally connected in the interior of the conveying pipe, a plurality of heaters are installed on the conveying pipe, the input end is communicated with a feeding assembly, the output end is fixedly connected with a flow dividing plate, a plurality of flow dividing holes communicated between the conveying pipe and the transfer box are formed in the flow dividing plate.

[0009] In the above-mentioned high-temperature-resistant plastic product forming extruder, the feeding assembly includes a hopper fixedly connected to the outer box, the hopper is communicated with an ion fan on one side and communicated with a dust filtering part on the other side, a stirring part is installed in the interior of the hopper, and a star-shaped discharge valve is communicated with the bottom of the hopper.

[0010] In the above-mentioned high-temperature-resistant plastic product forming extruder, a heat preservation shell is fixedly connected to the outside of the transfer box, and a heating plate is installed on the heat preservation shell.

[0011] In the above-mentioned high-temperature-resistant plastic product forming extruder, the stirrer includes a driving assembly connected to the heat preservation shell, the top of the transfer box and the inner top of the heat preservation shell enclose an installation space, the output end of the driving assembly extends into the interior of the installation space and is connected with a second pipe, the bottom end of the second pipe penetrates through the top wall of the transfer box and is sealingly and slidingly connected with a connecting shell, the bottom end of the connecting shell is communicated with a third pipe, a plurality of stirring blades are fixedly connected to the outside of the third pipe, a plurality of second powder titanium sintered plates are fixedly connected to the plurality of stirring blades one by one, the plurality of stirring blades are all arranged obliquely, and the stirring direction is axially upward along the third pipe.

[0012] The stirrer further comprises a vibration assembly connected to the bottom of the third pipeline, the vibration assembly comprising a fixed seat fixedly connected to the inner bottom of the transfer box, a connecting seat coaxially and rotatably connected inside the fixed seat, a plurality of first extrusion ball blocks fixedly connected inside the fixed seat, the fixed seat and the connecting seat being in sealing sliding fit with the outer side and the inner side of the third pipeline one by one, a spring fixedly connected between the top of the connecting seat and the third pipeline, a plurality of second extrusion ball blocks fixedly connected to the bottom end of the third pipeline, and the plurality of first extrusion ball blocks and the plurality of second extrusion ball blocks corresponding one by one.

[0013] The driving assembly comprises a driving motor installed at the top of the heat preservation shell, the output end of the driving motor being sealingly and penetratingly connected to the top wall of the heat preservation shell and coaxially and fixedly connected with a driving gear, the driving gear being engaged with a driven gear on the side, and the driving gear and the driven gear being located inside the installation space, and the driven gear being coaxially and fixedly connected with the second pipeline.

[0014] The transfer box is fixedly connected with a perforated plate at the top, the first powder titanium sintering plate is fixedly connected to the bottom of the perforated plate, the upper surface of the perforated plate and the inner top of the transfer box form an exhaust cavity, and the first exhaust assembly comprises a connecting pipe in communication with the exhaust cavity.

[0015] The vacuum pump is communicated with a one-way pipe at the input end, the stirring blade is provided with a hollow cavity inside, the third pipeline is provided with a first cavity inside, one end of the hollow cavity is communicated with the second powder titanium sintering plate, the other end is communicated with the first cavity, and the one-way pipe is penetratingly connected to the first cavity inside and away from the vacuum pump through the heat preservation shell and the second pipeline;

[0016] The second pipeline is communicated with the first pipeline through a rotary joint at the top, the first pipeline is sealingly and penetratingly connected to the heat preservation shell at the top and communicated with an external waste gas treatment device, the connecting pipe is communicated with the first pipeline at the end away from the exhaust cavity, and the first pipeline is provided with a one-way hole for the one-way pipe to pass through.

[0017] In the high-temperature-resistant plastic product forming extruder, the second cavity is formed in the second pipeline, the second cavity is communicated with the first cavity through the connecting shell, the piston is sealingly and slidably connected in the second cavity, and the piston is fixedly connected to the fixed ring, the piston is abutted against the fixed ring on the side close to the first cavity, the one-way pipe is sealingly and rotatably penetrated into the second cavity and the piston, the initial air pressure in the second cavity is greater than the initial air pressure in the first cavity, and the air pressures of the two cavities are both less than the internal air pressure of the transfer box, the fixed block is fixedly connected in the second cavity and constitutes a top wall of the second cavity, the mounting rod is fixedly connected to the bottom of the fixed block, the pressure sensor is mounted at the bottom end of the mounting rod, the pressure sensor and the vacuum pump are both electrically connected with the controller, and the controller is mounted in the equipment box and used for receiving the signal of the pressure sensor to control the working state of the vacuum pump.

[0018] Compared with the prior art, the application has the advantages that:

[0019] 1、The exhaust mechanism is arranged, the plastic melt is stirred and vibrated by the stirrer, and the melt is pushed to move upward, which is beneficial to the floating of the bubbles in the melt, and the bubbles floated to the first powder titanium sintered plate are discharged through the first exhaust assembly; meanwhile, the second exhaust assembly is arranged on the stirring blade, the second exhaust assembly continuously sucks the bubbles in the melt near the stirring blade through negative pressure, the bubbles in contact with the second powder titanium sintered plate on the stirring blade are sucked out, the bubbles in the melt are reduced, the problem that part of the bubbles may still remain due to the high viscosity of the high-temperature-resistant plastic melt and the large moving resistance of the bubbles is effectively avoided, and when the third pipeline is vibrated upward and downward, the size of the space in the first cavity changes continuously, so that the air pressure in the first cavity changes continuously, the melt and the bubbles in the melt are disturbed, the suction effect on the bubbles in the melt is enhanced, the bubbles in the melt are further reduced, and the quality of the plastic product is improved.

[0020] 2、The feeding assembly is arranged, the airflow carrying positive and negative ions is delivered into the hopper through the ion fan, the plastic particles are stirred by the stirring part, the electrostatic and air-drying effects are formed on the plastic particles, the electrostatic on the plastic particles is removed, the possibility of blockage during discharging is effectively reduced, the plastic particles are dried, the bubbles in the plastic melt are reduced by reducing the moisture, the working burden of the subsequent exhaust mechanism is reduced, and the working life of the exhaust mechanism is prolonged.

[0021] 3、The second cavity, pressure sensor and piston are set, the air bubble in the first cavity is sucked, the air pressure of the first cavity is increased, when the air pressure is greater than the air pressure in the second cavity, the piston is driven to move upward under the action of the air pressure and triggers the pressure sensor, the controller receives the signal of the pressure sensor, controls the vacuum pump to work, the vacuum pump extracts the gas in the first cavity through the one-way pipe, the air pressure in the first cavity returns to the initial state, the first cavity can continue to extract the air bubble, and the continuous suction can be realized through the interval use of the vacuum pump, the situation that the vacuum pump is continuously sucked without air bubble and the vacuum pump is damaged is avoided, and the service life of the vacuum pump can be effectively prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The whole structure schematic diagram of the high-temperature-resistant plastic product forming extruder is provided;

[0023] Figure 2 The internal structure schematic diagram of the outer box of the high-temperature-resistant plastic product forming extruder is provided;

[0024] Figure 3 The feeding assembly schematic diagram of the high-temperature-resistant plastic product forming extruder is provided;

[0025] Figure 4 The hopper structure sectional view of the high-temperature-resistant plastic product forming extruder is provided;

[0026] Figure 5 The conveying pipe and transfer box structure sectional view of the high-temperature-resistant plastic product forming extruder is provided;

[0027] Figure 6 The stirring blade, second powder titanium sintering plate and fixed seat structure schematic diagram of the high-temperature-resistant plastic product forming extruder is provided

[0028] Figure 7 The exhaust mechanism schematic diagram of the high-temperature-resistant plastic product forming extruder is provided;

[0029] Figure 8 The first pipe, second pipe and third pipe structure sectional view of the high-temperature-resistant plastic product forming extruder is provided;

[0030] Figure 9 The Figure 8 Detail enlarged view of A in the middle;

[0031] Figure 10 The Figure 8 Detail enlarged view of B in the middle;

[0032] Figure 11A third pipeline, fixing seat and connecting seat structure split schematic view of a high-temperature-resistant plastic product forming extruder is provided.

[0033] In the figure: 1, equipment box; 2, driving part; 3, outer box; 4, hopper; 5, dust filter part; 6, conveying pipe; 7, heat preservation shell; 8, heating plate; 9, transfer box; 10, machine head; 11, heater; 12, stirring part; 13, star-shaped discharge valve; 14, ion fan; 15, spiral feeding rod; 16, flow divider; 17, driving gear; 18, driven gear; 19, first pipeline; 20, second pipeline; 21, connecting pipe; 22, perforated plate; 23, first powder titanium sintered plate; 24, third pipeline; 25, connecting shell; 26, stirring blade; 27, second powder titanium sintered plate; 28, fixing seat; 29, one-way pipe; 30, vacuum pump; 31, piston; 311, first cavity; 312, second cavity; 32, mounting rod; 33, pressure sensor; 34, fixing ring; 35, fixing block; 36, connecting seat; 37, spring; 38, first extrusion ball; 39, second extrusion ball. DETAILED DESCRIPTION

[0034] The following examples are for illustrative purposes only and are not intended to limit the scope of the present application.

[0035] REFERENCE Figures 1-5 A high-temperature-resistant plastic product forming extruder, comprising an equipment box 1, further comprising:

[0036] An extruding mechanism is installed on the equipment box 1.

[0037] The extruding mechanism comprises a driving part 2 installed on the equipment box 1, the driving part 2 is fixedly connected with an outer box 3, the outer box 3 is fixedly connected with a conveying pipe 6 inside, the driving part 2 is sealingly penetrated through the conveying pipe 6 at the output end, and is coaxially fixedly connected with a spiral feeding rod 15, the spiral feeding rod 15 is rotationally connected inside the conveying pipe 6, a plurality of heaters 11 are installed on the conveying pipe 6, and a feeding assembly is communicated at the input end, and a flow divider 16 is fixedly connected at the output end.

[0038] The feeding assembly comprises a hopper 4 fixedly connected on the outer box 3, the hopper 4 is communicated with an ion fan 14 on one side and a dust filter part 5 on the other side, a stirring part 12 is installed inside the hopper 4, and a star-shaped discharge valve 13 is communicated at the bottom, and the bottom end of the star-shaped discharge valve 13 is communicated with the input end of the conveying pipe 6.

[0039] The ion fan 14 adopts the prior art and is used to convey the airflow containing positive and negative ions into the hopper 4, the dust filter part 5 adopts the prior art and filters the dust in the airflow through the filtering structure, and the filtered airflow is discharged from the inside of the hopper 4.

[0040] The stirring part 12 adopts the existing stirring mechanism, and the plastic particles in the hopper 4 are stirred by driving the blade to rotate through an external motor.

[0041] The star-shaped discharge valve 13 adopts the existing technology, which realizes material quantification and uniform discharge through a rotating star-shaped impeller, and can effectively prevent air leakage.

[0042] With reference to Figures 5-9 , the exhaust mechanism, the extrusion mechanism includes a conveying pipe 6 and a machine head 10, the exhaust mechanism includes a transfer box 9 connected between the conveying pipe 6 and the machine head 10, the transfer box 9 is connected with a stirrer, the output end of the stirrer extends into the inside of the transfer box 9, a first powder titanium sintered plate 23 is fixedly connected to the top inside of the transfer box 9, a second powder titanium sintered plate 27 is fixedly connected to the output end of the stirrer, the bottom of the first powder titanium sintered plate 23 is communicated with the inside of the transfer box 9, and the top is communicated with a first exhaust assembly, one end of the second powder titanium sintered plate 27 is communicated with the inside of the transfer box 9, and the other end is communicated with a second exhaust assembly, the second exhaust assembly includes a vacuum pump 30 installed on the outside of the transfer box 9, and the vacuum pump 30 is used to control the air pressure state in the second exhaust assembly.

[0043] The first powder titanium sintered plate 23 and the second powder titanium sintered plate 27 are both made of powder titanium sintering, which has tiny gaps, so that air can pass through but molten plastic cannot pass through, facilitating the exhaust operation of the molten plastic.

[0044] The splitter plate 16 is provided with a plurality of shunt holes communicating the conveying pipe 6 and the transfer box 9.

[0045] The transfer box 9 is fixedly connected with a heat preservation shell 7, and the heat preservation shell 7 is installed with a heating plate 8 to heat and preserve the plastic melt in the transfer box 9.

[0046] The stirrer includes a driving assembly connected to the heat preservation shell 7, the top of the transfer box 9 and the inside top of the heat preservation shell 7 form an installation space, the output end of the driving assembly extends into the inside of the installation space and is connected with a second pipeline 20, the bottom end of the second pipeline 20 penetrates through the top wall of the transfer box 9 and is sealingly and slidingly connected with a connecting shell 25, the bottom end of the connecting shell 25 is communicated with a third pipeline 24, a plurality of stirring blades 26 are fixedly connected to the second powder titanium sintered plates 27 on the plurality of stirring blades 26, and the plurality of stirring blades 26 are all inclinedly arranged and the stirring direction is axially upward along the third pipeline 24.

[0047] A sealing rubber strip is fixedly arranged on the inside of the connecting shell 25, which is used to seal the joint between the connecting shell 25 and the second pipeline 20, and improve the sealing effect therebetween.

[0048] With reference to Figure 10 and Figure 11The agitator further comprises a vibration assembly connected to the bottom of the third pipeline 24, the vibration assembly comprising a fixed seat 28 fixedly connected to the inner bottom of the transfer box 9, a connecting seat 36 coaxially and rotatably connected in the fixed seat 28, a plurality of first extrusion ball blocks 38 fixedly connected in the fixed seat 28, the fixed seat 28 and the connecting seat 36 being in sealing and sliding fit with the outer side and the inner side of the third pipeline 24 one by one, a spring 37 fixedly connected between the top of the connecting seat 36 and the third pipeline 24, and a plurality of second extrusion ball blocks 39 fixedly connected to the bottom end of the third pipeline 24, the plurality of first extrusion ball blocks 38 and the plurality of second extrusion ball blocks 39 corresponding one by one.

[0049] The driving assembly comprises a driving motor installed at the top of the heat preservation shell 7, the output end of the driving motor being sealingly and coaxially fixedly connected with a driving gear 17 penetrating through the top wall of the heat preservation shell 7, the driving gear 17 being engaged with a driven gear 18 at the side thereof, the driving gear 17 and the driven gear 18 being located in the interior of the installation space, and the driven gear 18 being coaxially and fixedly connected with the second pipeline 20.

[0050] The transfer box 9 is fixedly connected with a perforated plate 22 at the top thereof, and a first powder titanium sintering plate 23 is fixedly connected to the bottom of the perforated plate 22, the upper surface of the perforated plate 22 and the inner top of the transfer box 9 forming an exhaust cavity, and the first exhaust assembly comprising a connecting pipe 21 in communication with the exhaust cavity.

[0051] The perforated plate 22 supports the first powder titanium sintering plate 23, thereby improving the stability of the first powder titanium sintering plate 23 during operation.

[0052] The vacuum pump 30 is communicated with a one-way pipe 29 at the input end thereof, the agitator blade 26 is provided with a hollow cavity in the interior thereof, the third pipeline 24 is provided with a first cavity 311 in the interior thereof, the hollow cavity is communicated with the second powder titanium sintering plate 27 at one end and communicated with the first cavity 311 at the other end, and the one-way pipe 29 is penetrating through the heat preservation shell 7 and the second pipeline 20 at the end thereof away from the vacuum pump 30 and communicated with the interior of the first cavity 311.

[0053] The second pipeline 20 is communicated with a first pipeline 19 at the top end thereof through a rotating joint, the first pipeline 19 is sealingly penetrating through the heat preservation shell 7 at the top end thereof and communicated with an external waste gas treatment device, the connecting pipe 21 is communicated with the first pipeline 19 at the end thereof away from the exhaust cavity, and the first pipeline 19 is provided with a one-way hole for the one-way pipe 29 to pass through.

[0054] The external waste gas treatment device performs waste gas treatment operation on the gas discharged from the first pipeline 19, thereby avoiding direct discharge of the waste gas to pollute the environment.

[0055] The second pipeline 20 is provided with a second cavity 312 in the interior thereof, the second cavity 312 is communicated with the first cavity 311 through a connecting shell 25, and the second cavity 312 is sealingly and slidingly connected with a piston 31 and fixedly connected with a fixed ring 34 in the interior thereof.

[0056] The fixed ring 34 is used for limiting the piston 31.

[0057] The piston 31 is abutted against the fixed ring 34 near the side connected with the first cavity 311, the one-way pipe 29 is rotatably and sealingly penetrated into the second cavity 312 and the piston 31, the initial air pressure in the second cavity 312 is greater than that in the first cavity 311, and the air pressure in both of them is less than the air pressure in the intermediate transfer box 9, the fixed block 35 is fixedly connected in the second cavity 312, the fixed block 35 forms the top wall of the second cavity 312, the mounting rod 32 is fixedly connected at the bottom of the fixed block 35, the pressure sensor 33 is installed at the bottom end of the mounting rod 32, the pressure sensor 33 and the vacuum pump 30 are electrically connected with the controller, the controller is installed in the inside of the equipment box 1, and is used for receiving the signal of the pressure sensor 33 to control the working state of the vacuum pump 30.

[0058] In use, the external conveying equipment conveys the high-temperature-resistant plastic particles into the inside of the hopper 4, the ion fan 14 works to blow the wind containing positive and negative ions, which can eliminate the static electricity between the plastic particles and form a drying effect on the plastic particles to reduce the moisture on the plastic particles, so as to reduce the air bubbles of the subsequent molten plastic, the stirring part 12 works to stir the plastic particles in the inside of the hopper 4, which can also promote the contact between the plastic particles and the ions, the gas blown by the ion fan 14 can be filtered and discharged through the dust filtering part 5, and the plastic particles can be effectively reduced through stirring and destatic operation, so as to reduce the possibility of blockage during discharging.

[0059] The processed plastic particles are quantitatively and uniformly discharged under the control of the star-shaped discharge valve 13, and air leakage can be effectively prevented, and the plastic particles fall into the inside of the conveying pipe 6 after passing through the star-shaped discharge valve 13.

[0060] The driving part 2 works, the output end drives the screw feeding rod 15 to rotate, and cooperates with the multiple heaters 11 to work, so that the plastic particles in the inside of the conveying pipe 6 are heated to a molten state and are conveyed.

[0061] After the plastic particles are melted in the inside of the conveying pipe 6, they enter the inside of the intermediate transfer box 9 through the flow distribution plate 16.

[0062] When the molten plastic enters the inside of the intermediate transfer box 9, the driving motor works, the output end drives the second pipe 20 to rotate through the driving gear 17 and the driven gear 18, the second pipe 20 drives the multiple stirring blades 26 to rotate through the connecting shell 25 and the third pipe 24, so as to stir the plastic melt, facilitate the air bubbles in the melt to float up, and the floated air bubbles enter the inside of the exhaust cavity through the first powder titanium sintering plate 23 and the perforated plate 22, are discharged into the inside of the first pipe 19 through the connecting pipe 21, and are finally discharged into the external waste gas treatment device.

[0063] When the stirring blade 26 rotates, it pushes the melt to move upward, further facilitating the bubbles in the melt to float upward quickly, and improving the removal effect of the bubbles in the melt.

[0064] During the rotation of the third pipe 24, the third pipe 24 drives the plurality of second extrusion blocks 39 at the bottom of the third pipe 24 to rotate, so that the second extrusion blocks 39 continuously press the first extrusion blocks 38 on the fixed seat 28, and the third pipe 24 moves upward. After the second extrusion blocks 39 and the first extrusion blocks 38 are rotationally misaligned, under the elastic force of the spring 37, the third pipe 24 is pulled to move downward, so that when the third pipe 24 rotates, the third pipe 24 drives the stirring blade 26 to reciprocate upward and downward, improving the stirring effect of the stirring blade 26 on the melt and enhancing the floating effect of the bubbles in the melt, and better removing the bubbles in the melt.

[0065] At the same time, since the air pressure inside the first cavity 311 is significantly less than the air pressure inside the transfer box 9, the first cavity 311 forms a negative pressure suction effect on the bubbles in the melt near the second powder titanium sintered plate 27 through the hollow cavity of the stirring blade 26 and the second powder titanium sintered plate 27. During the rotation and vibration of the stirring blade 26, after the second powder titanium sintered plate 27 on the stirring blade 26 contacts the bubbles, the bubbles enter the inside of the first cavity 311 through the second powder titanium sintered plate 27 and the hollow cavity. Due to the high viscosity of the melt, the movement resistance of the bubbles in the melt is large, and part of the bubbles may still remain in the melt through stirring and vibration. Therefore, through the design of the air pressure difference, a continuous suction force is generated on the surface of the stirring blade 26, which continuously sucks the bubbles inside the melt during the rotation and vibration of the stirring blade 26, further improving the removal effect of the bubbles in the melt.

[0066] When the first cavity 311 performs negative pressure suction on the bubbles in the melt near the stirring blade 26, the size of the space inside the first cavity 311 changes constantly during the upward and downward vibration of the third pipe 24, so that the air pressure inside the first cavity 311 changes constantly, forming a disturbance effect on the melt and the bubbles in the melt, and enhancing the suction effect of the bubbles in the melt.

[0067] The initial air pressure inside the second cavity 312 is greater than the initial air pressure inside the first cavity 311, and the air pressure of both is less than the internal air pressure of the transfer box 9. As the bubbles are sucked into the inside of the first cavity 311, the air pressure in the first cavity 311 increases constantly. When the air pressure in the first cavity 311 increases constantly until it is greater than the air pressure in the second cavity 312, under the action of the air pressure, the piston 31 moves upward, the piston 31 contacts the pressure sensor 33, the controller receives the signal of the pressure sensor 33, controls the vacuum pump 30 to work, and the vacuum pump 30 extracts the gas in the first cavity 311 through the one-way pipe 29, so that the air pressure in the first cavity 311 returns to the initial state, and the piston 31 returns to the original position under the action of the air pressure, for the next work.

[0068] After the melt in the bin 9 has been vented, the melt is extruded through the head 10.

[0069] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high temperature resistant plastic article forming extruder comprising a device box (1), characterized in that, Also include: Extrusion mechanism, extrusion mechanism is installed on the equipment box (1); Exhaust mechanism, the extrusion mechanism includes a conveying pipe (6) and a machine head (10), the exhaust mechanism includes a transfer box (9) communicated between the conveying pipe (6) and the machine head (10), the transfer box (9) is connected with the stirrer, the stirrer output end extends into the inside of the transfer box (9), the inside of the transfer box (9) is fixedly connected with the first powder titanium sintered plate (23) on the top, the stirrer output end is fixedly connected with the second powder titanium sintered plate (27), the first powder titanium sintered plate (23) bottom is communicated with the inside of the transfer box (9), and the top is communicated with the first exhaust assembly, one end of the second powder titanium sintered plate (27) is communicated with the inside of the transfer box (9), and the other end is communicated with the second exhaust assembly, the second exhaust assembly includes a vacuum pump (30) installed on the outside of the transfer box (9), the vacuum pump (30) is used to control the air pressure state in the second exhaust assembly; The first powder titanium sintered plate (23) and the second powder titanium sintered plate (27) are both made of powder titanium sintering, which has tiny gaps, so that air can pass through while molten plastic cannot, facilitating the exhaust operation of molten plastic.

2. The high temperature resistant plastic article forming extruder of claim 1, wherein, The extrusion mechanism includes a driving part (2) installed on the equipment box (1), the driving part (2) is fixedly connected with an outer box (3), the outer box (3) is fixedly connected with a conveying pipe (6) inside, the driving part (2) output end is sealed through the conveying pipe (6), and is coaxially fixedly connected with a spiral feeding rod (15), the spiral feeding rod (15) is rotatably connected in the inside of the conveying pipe (6), a plurality of heaters (11) are installed on the conveying pipe (6), and the input end is communicated with a feeding assembly, the output end is fixedly connected with a flow dividing plate (16), a plurality of flow dividing holes are formed in the flow dividing plate (16), which are communicated with the conveying pipe (6) and the transfer box (9).

3. The high temperature resistant plastic article forming extruder of claim 2, wherein, The feeding assembly includes a hopper (4) fixedly connected to the outer box (3), one side of the hopper (4) is communicated with an ion fan (14), the other side is communicated with a dust filtering part (5), the hopper (4) is internally provided with a stirring part (12), and the bottom is communicated with a star-shaped discharge valve (13), the bottom end of the star-shaped discharge valve (13) is communicated with the input end of the conveying pipe (6).

4. The high temperature resistant plastic article forming extruder of claim 1, wherein, The transfer box (9) is fixedly connected with a heat preservation shell (7) on the outside, and the heat preservation shell (7) is installed with a heating plate (8).

5. The high temperature resistant plastic article forming extruder of claim 4, wherein, The stirring part includes a driving assembly connected to the heat preservation shell (7), the top of the transfer box (9) and the inner top of the heat preservation shell (7) form an installation space, the output end of the driving assembly extends into the inside of the installation space, and is connected with a second pipe (20), the bottom end of the second pipe (20) penetrates through the top wall of the transfer box (9), and is sealingly and slidingly connected with a connecting shell (25), the bottom end of the connecting shell (25) is communicated with a third pipe (24), the outside of the third pipe (24) is fixedly connected with a plurality of stirring blades (26), a plurality of second powder titanium sintered plates (27) are fixedly connected to the plurality of stirring blades (26) one by one, the plurality of stirring blades (26) are all inclinedly arranged, and the stirring direction is axially upward along the third pipe (24).

6. The high temperature resistant plastic article forming extruder of claim 5, wherein, The agitator further comprises a vibration assembly connected at the bottom of the third pipeline (24), the vibration assembly comprising a fixed seat (28) fixedly connected to the inner bottom of the transfer box (9), a connecting seat (36) coaxially rotatably connected inside the fixed seat (28), a plurality of first extrusion ball blocks (38) fixedly connected inside the fixed seat (28), the fixed seat (28) and the connecting seat (36) being in sealing sliding fit with the outer side and the inner side of the third pipeline (24) one by one, a spring (37) fixedly connected between the top of the connecting seat (36) and the third pipeline (24), a plurality of second extrusion ball blocks (39) fixedly connected at the bottom end of the third pipeline (24), the plurality of first extrusion ball blocks (38) and the plurality of second extrusion ball blocks (39) corresponding one by one.

7. The high temperature resistant plastic article forming extruder of claim 5, wherein, The driving assembly comprises a driving motor installed at the top of the heat preservation shell (7), the output end of the driving motor being sealingly penetrated through the top wall of the heat preservation shell (7) and coaxially fixedly connected with a driving gear (17), the driving gear (17) being meshed with a driven gear (18) on the side, the driving gear (17) and the driven gear (18) being located inside the installation space, and the driven gear (18) being coaxially fixedly connected with the second pipeline (20).

8. The high temperature resistant plastic article forming extruder of claim 5, wherein, The transfer box (9) is fixedly connected with a perforated plate (22) at the top, the first powder titanium sintered plate (23) is fixedly connected at the bottom of the perforated plate (22), the upper surface of the perforated plate (22) and the inner top of the transfer box (9) form an exhaust cavity, and the first exhaust assembly comprises a connecting pipe (21) in communication with the exhaust cavity.

9. The high temperature resistant plastic article forming extruder of claim 6, wherein, The vacuum pump (30) is communicated with a one-way pipe (29), the agitator blade (26) is provided with a hollow cavity, the third pipeline (24) is provided with a first cavity (311) inside, one end of the hollow cavity is communicated with the second powder titanium sintered plate (27), the other end is communicated with the first cavity (311), and the end of the one-way pipe (29) away from the vacuum pump (30) is penetrated through the heat preservation shell (7) and the second pipeline (20) and communicated with the inside of the first cavity (311); The second pipeline (20) is communicated with the first pipeline (19) through a rotary joint at the top, the first pipeline (19) is sealingly penetrated through the heat preservation shell (7) at the top and communicated with an external waste gas treatment device, the end of the connecting pipe (21) away from the exhaust cavity is communicated with the first pipeline (19), and the first pipeline (19) is provided with a one-way hole for the one-way pipe (29) to pass through.

10. The high temperature resistant plastic article forming extruder of claim 9, wherein, The second pipeline (20) is internally provided with a second cavity (312), the second cavity (312) is communicated with the first cavity (311) through the connecting shell (25), the second cavity (312) is internally and sealingly connected with a piston (31), and the piston (31) is fixedly connected to a fixed ring (34); the piston (31) is abutted against the fixed ring (34) on the side close to the first cavity (311); the one-way pipe (29) is sealingly and rotatably penetrated into the second cavity (312) and the piston (31); the initial air pressure in the second cavity (312) is greater than the initial air pressure in the first cavity (311), and the air pressure in the second cavity (312) and the first cavity (311) is both less than the air pressure in the intermediate transfer box (9); the second cavity (312) is internally and fixedly connected with a fixed block (35), the fixed block (35) constitutes a top wall of the second cavity (312); the fixed block (35) is fixedly connected with a mounting rod (32) at the bottom; the mounting rod (32) is installed with a pressure sensor (33) at the bottom end; the pressure sensor (33) and the vacuum pump (30) are both electrically connected with a controller; the controller is installed in the equipment box (1) and is used for receiving the signal of the pressure sensor (33) to control the working state of the vacuum pump (30).

Images