Combined temperature control mechanism for hot melt extruders

Abstract

The present application relates to the technical field of extruders, in particular to a combined temperature control mechanism of a hot melt extruder, comprising a machine table, a housing, an oil tank and an extruder barrel fixed on the top of the machine table. The device can separately conduct heat to the four sides of the extruder barrel through the first, second, third and fourth grooves and the heat-conducting fins. The sealing partitions of different heights are moved apart by the servo motor, first, second, third and fourth trapezoidal blocks. The first, second, third and fourth grooves are in communication with or disconnected from the flow divider by the interval movement of the sealing partitions, so that the heat-conducting oil is separated and sequentially enters without mixing, and then is discharged through the oil drain hole, thereby achieving separate heat conduction and circulation cooling of the four sides of the extruder barrel, avoiding the direct heat absorption and flow of the heat-conducting oil, and affecting the overall cooling effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of extruders, in particular to a combined temperature control mechanism of a hot melt extruder. BACKGROUND

[0002] An extruder is a conventional rubber and plastic processing mechanical equipment, which is widely used in polymer blending, filling modification, regeneration and extrusion molding. When the extruder is used, a temperature control mechanism is needed to heat and control the temperature of the raw materials.

[0003] The current temperature control mechanism of the extruder barrel adopts an electric heating ring, a cooling system and a temperature sensor to cooperate in temperature control. The cooling system realizes heat conduction cooling through closed circulation, that is, the high-temperature heat conduction oil absorbs heat from the barrel jacket or the screw cooling channel, and then flows into the heat exchanger to exchange heat with the external cooling water (or air). However, when the heat conduction oil flows in the jacket or the screw cooling channel, the heat conduction oil first conducts heat and then moves. At this time, the heat conduction oil that has completed heat conduction continues to flow, which easily reduces the heat conduction cooling efficiency of the subsequent position, affects the overall cooling effect, and is inconvenient to use. SUMMARY

[0004] Therefore, it is necessary to provide a combined temperature control mechanism of a hot melt extruder in view of the technical problems of the prior art.

[0005] To solve the technical problems of the prior art, the technical scheme adopted by the present application is as follows:

[0006] The combined temperature control mechanism of the hot melt extruder comprises a machine table, an outer shell, an oil tank and an extruder barrel fixed on the top of the machine table, three heating jackets and three fixed frames fixedly sleeved on the extruder barrel, and a spacing heat conduction mechanism arranged on the three fixed frames.

[0007] The spacing heat conduction mechanism comprises a flow dividing pipe installed on the top of the fixed frame, two first grooves formed in the bottom inner wall of the fixed frame, a second groove and a third groove formed in the opposite inner walls of the fixed frame, two fourth grooves formed in the top inner wall of the fixed frame, heat conduction fins installed on the opposite inner walls of the two first grooves, the two second grooves, the two third grooves and the two fourth grooves, a first oil pump installed on the side of the oil tank, a connecting pipe commonly installed on the output end of the first oil pump and the inlet end of the flow dividing pipe, and an isolation heat conduction circulating assembly arranged on the fixed frame and matched with the flow dividing pipe.

[0008] Preferably, the heat-conducting and isolating circulating assembly comprises first, second and third through holes respectively communicating with the two first, second and third recesses and the two fourth recesses on the outer walls of the fixed frame, two fourth through holes respectively matching the two fourth recesses are formed on the top of the fixed frame, the multiple output ends of the shunt pipe respectively communicate with the two first, second, third and fourth through holes, the moving cavities respectively communicating with the two first, second, third and fourth through holes are formed on the fixed frame, the sealing partitions are movably installed in the multiple moving cavities, the back-shaped discharging cavity is formed on the fixed frame, the oil discharge holes communicating with the back-shaped discharging cavity are formed in the side inner walls of the two first, second, third and fourth recesses, the back-shaped piston is movably arranged in the back-shaped discharging cavity, and the driving and cooling unit for moving the multiple sealing partitions in sequence and moving the back-shaped piston is arranged on the fixed frame.

[0009] Preferably, the driving and cooling unit comprises a fixed box mounted on the top of the fixed frame, a reversible screw rod is rotatably mounted on the side inner wall of the fixed box, a servo motor is mounted on the side of the fixed box, one end of the reversible screw rod extends out of the fixed box and is mounted on the output shaft of the servo motor, two L-shaped movable blocks are threadedly mounted on the reversible screw rod, L-shaped movable plates are mounted on the bottoms of the two L-shaped movable blocks, first, second, third and fourth trapezoidal blocks are mounted on the sides of the two L-shaped movable plates, the first, second, third and fourth trapezoidal blocks are arranged in a staggered manner, moving rods are mounted on the sides of the multiple sealing partitions, one end of the multiple moving rods extends out of the fixed frame and is provided with a circular plate, rollers are mounted on the sides of the multiple circular plates, the elastic elements matching the multiple circular plates are arranged on the fixed frame, a moving box is mounted on the bottom of the fixed frame, a driven unit for moving the back-shaped piston is arranged on the moving box, the driven unit is mounted in cooperation with one of the L-shaped movable plates, three supporting columns are mounted on the top of the oil tank, a treatment tank is mounted on the top of the three supporting columns, an oil inlet hole is fixedly arranged on the side of the treatment tank, a second oil pump is mounted on the side of the fixed frame, a flow pipe is mounted on the output end of the second oil pump in cooperation with the oil inlet hole, fixed holes are formed on the top of the oil tank and the bottom of the treatment tank, an oil discharge pipe comprising an electric valve is mounted on the two fixed holes in cooperation, a cooling element is arranged on the treatment tank and mounted in cooperation with the reversible screw rod.

[0010] Preferably, the elastic elements comprise multiple springs mounted on the side walls of the fixed frame, and the other ends of the multiple springs are respectively mounted on the sides of the multiple circular plates.

[0011] Preferably, the driven unit comprises a threaded rod rotatably mounted on the opposite inner wall of the moving box, an L-shaped threaded block is threadedly sleeved on the threaded rod, one end of the L-shaped threaded block extends into the meandering discharging cavity and is mounted on the side of the meandering piston, an L-shaped moving plate is mounted on the bottom of the L-shaped movable plate, a rack is mounted on the side of the L-shaped moving plate, a circular gear is sleeved on the threaded rod, and the circular gear is in mesh with the rack.

[0012] Preferably, the side of the L-shaped threaded block is provided with a shielding plate.

[0013] Preferably, the cooling element comprises a reciprocating screw rod rotatably mounted on the top of the processing tank, a lifting plate is threadedly sleeved on the reciprocating screw rod, a rotating hole is formed in the lifting plate, a movable rod is rotatably mounted on the rotating hole, a first bevel gear is mounted on the top end of the reciprocating screw rod, a protection box is mounted on the top of the processing tank, an active hole is formed in the top of the protection box, an annular block is rotatably mounted on the active hole, the movable rod penetrates through the annular block, two limiting blocks are mounted on the circumferential outer wall of the movable rod, a limiting groove matched with the limiting blocks is formed in the bottom of the annular block, a second bevel gear is sleeved on the annular block, a third bevel gear is mounted on one end of the positive and negative toothed screw rod extending into the protection box, the first bevel gear and the second bevel gear are in mesh with the third bevel gear, an avoiding hole matched with the movable rod is formed in the top of the processing tank, two cooling pipelines are mounted on the circumferential outer wall of the movable rod, two connecting holes in communication with the two cooling pipelines are formed in the top end and the bottom end of the movable rod, a rotary joint is mounted on the top end and the bottom end of the movable rod, an active pipe and a hose are mounted on the other end of the two rotary joints, respectively, and a mounting hole is formed in the bottom of the processing tank, a fixed pipe is mounted on the mounting hole.

[0014] Preferably, the diameters of the first bevel gear and the second bevel gear are smaller than the diameter of the third bevel gear.

[0015] Preferably, a guide rod is mounted on the top of the processing tank, a guide hole is formed in the top of the lifting plate, and the guide rod penetrates through the guide hole.

[0016] Preferably, the bottom inner walls of the two first grooves, the two second grooves and the two third grooves and the top of the uppermost two heat-conducting fins are all inclined, and three temperature detectors are mounted on the side of the extruder barrel.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] One: the device can be divided into four sides of the extruder cylinder heat conduction through the setting of the first groove, the second groove, the third groove, the fourth groove and the heat conduction sheet, the servo motor can make the two L-shaped movable plate moves, the two L-shaped movable plate moves will be through the moving rod, spring, first trapezoidal block, second trapezoidal block, third trapezoidal block and fourth trapezoidal block make the sealing partition plate of different height interval movement, through the interval movement of the sealing partition plate, the first through hole, the second through hole, the third through hole and the fourth through hole can make the first groove, the second groove, the third groove, the fourth groove and the shunt pipe communication or cancel the communication, in turn, so that the heat conducting oil is separated and mixed, and then discharged through the oil drain hole, so that the four sides of the extruder cylinder are divided into four sides, and the heat conduction cycle cooling is carried out, so as to avoid the direct heat absorption of the heat conducting oil and the influence of the overall cooling effect;

[0019] Secondly, the device can be water circulated in the processing tank under the cooperation of the external water circulating device through the setting of the movable rod, the cooling pipeline, the connecting hole, the rotary joint, the movable pipe, the hose and the fixed pipe, so that the heat conducting oil in the processing tank is cooled, and the reciprocating screw rod and the ring block are provided, so that the movable rod moves up and down and rotates while the reciprocating toothed rod rotates, and then the cooling pipeline moves up and down and rotates, so that the heat conducting oil at different positions and heights is cooled, and the cooling uniformity and heat exchange efficiency are effectively improved.

[0020] Thirdly, the device can block the oil drain hole through the setting of the back-shaped piston, so as to avoid the direct falling of the heat conducting oil, and the threaded rod, the L-shaped threaded block, the L-shaped movable plate, the rack and the circular gear can be used to move the back-shaped piston to cancel the blocking of the oil drain hole after the heat conduction is completed, and the back-shaped piston can generate suction in the first groove, the second groove, the third groove and the fourth groove, so that the heat conducting oil in the first groove, the second groove, the third groove and the fourth groove flows out. DRAWINGS

[0021] Figure 1 is the three-dimensional structure schematic diagram of the present application;

[0022] Figure 2 is the partial structure schematic diagram of the present application;

[0023] Figure 3 is the three-dimensional structure schematic diagram of the oil tank in the present application;

[0024] Figure 4 is the three-dimensional structure schematic diagram of the fixed frame in the present application;

[0025] Figure 5 is the three-dimensional structure schematic diagram of the fixed frame and the fixed box in the present application;

[0026] Figure 6 is Figure 5 the enlarged view of structure A in the present application;

[0027] Figure 7 is a schematic diagram of the three-dimensional structure of the invention without the machine table, the shell, the oil tank and the extruder barrel;

[0028] Figure 8 is a schematic diagram of the three-dimensional structure of the fixed frame and the back-shaped piston in the invention;

[0029] Figure 9 is a schematic diagram of the three-dimensional structure of the fixed frame, the L-shaped movable plate and the moving box in the invention;

[0030] Figure 10 is Figure 9 is an enlarged view of the structure at B in the figure;

[0031] Figure 11 is a schematic diagram of the three-dimensional structure of the processing tank and the protective shell in the invention;

[0032] Figure 12 is Figure 11 is an enlarged view of the structure at C in the figure.

[0033] The figure is marked as:

[0034] 1, machine table; 2, shell; 3, oil tank; 4, extruder barrel; 5, heating jacket; 6, fixed frame; 7, shunt pipe; 8, first groove; 9, first through hole; 10, second groove; 11, second through hole; 12, third groove; 13, third through hole; 14, fourth groove; 15, fourth through hole; 16, heat conduction sheet; 17, moving rod; 18, spring; 19, sealing partition; 20, fixed box; 21, positive and negative toothed rod; 22, servo motor; 23, L-shaped movable block; 24, L-shaped movable plate; 25, first trapezoidal block; 26, second trapezoidal block; 27, third trapezoidal block; 28, fourth trapezoidal block; 29, back-shaped discharging cavity; 30, oil leakage hole; 31, back-shaped piston; 32, moving box; 33, threaded rod; 34, L-shaped threaded block; 35, L-shaped moving plate; 36, rack; 37, circular gear; 38, first oil pump; 39, connecting pipe; 40, second oil pump; 41, flow pipe; 42, processing tank; 43, protective box; 44, movable rod; 45, rotary joint; 46, fixed pipe; 47, oil leakage pipe; 48, cooling pipeline; 49, reciprocating screw rod; 50, lifting plate; 51, first bevel gear; 52, annular block; 53, second bevel gear; 54, limiting block; 55, third bevel gear; 56, shielding plate; 57, temperature detector. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means and specific purposes and functions achieved by the present invention, the present invention will be described in further detail below in conjunction with the drawings and specific embodiments.

[0036] Figures 1-12 is the best embodiment of the present application, the following will be described in conjunction with the accompanying Figure 1 ~ attached Figure 12 Further illustrate the present application.

[0037] Example 1:

[0038] The combined temperature control mechanism of the hot melt extruder comprises a machine table 1, an outer shell 2, an oil tank 3 and an extruder barrel 4 are fixed on the top of the machine table 1, three heating jackets 5 and three fixed frames 6 are fixedly sleeved on the extruder barrel 4, specifically, the heating jacket 5 is a prior art, and contains an electric heating rod inside, and the electric heating rod is attached to the surface of the extruder barrel 4, and the three fixed frames 6 are provided with interval heat conduction mechanisms;

[0039] The interval heat conduction mechanism comprises a shunt pipe 7 installed on the top of the fixed frame 6, two first grooves 8 are formed in the bottom inner wall of the fixed frame 6, second grooves 10 and third grooves 12 are formed in the opposite inner walls of the fixed frame 6, two fourth grooves 14 are formed in the top inner wall of the fixed frame 6, heat conduction sheets 16 are installed on the opposite inner walls of the two first grooves 8, the two second grooves 10, the two third grooves 12 and the two fourth grooves 14, a first oil pump 38 is installed on the side of the oil tank 3, a connecting pipe 39 is jointly installed on the output end of the first oil pump 38 and the inlet end of the shunt pipe 7, and an isolation heat conduction circulating assembly adapted to the shunt pipe 7 is arranged on the fixed frame 6.

[0040] As Figure 4 , Figure 5 and Figure 6As shown, the isolation heat conduction circulating assembly comprises first, second and third through holes 9, 11 and 13 respectively communicating with two first, second and third recesses 8, 10 and 12 on the two side walls of the fixed frame 6, two fourth through holes 15 respectively matching two fourth recesses 14 are formed on the top of the fixed frame 6, a plurality of output ends of the shunt pipe 7 respectively communicate with the two first, second, third and fourth through holes 9, 11, 13 and 15, a plurality of moving cavities respectively communicating with the two first, second, third and fourth through holes 9, 11, 13 and 15 are formed on the fixed frame 6, a sealing partition plate 19 is movably installed in each of the plurality of moving cavities, a U-shaped discharging cavity 29 is formed on the fixed frame 6, oil discharge holes 30 communicating with the U-shaped discharging cavity 29 are formed in the side walls of the two first, second, third and fourth recesses 8, 10, 12 and 14, a U-shaped piston 31 is movably arranged in the U-shaped discharging cavity 29, and a driving cooling unit is arranged on the fixed frame 6 to move the plurality of sealing partition plates 19 from bottom to top and move the U-shaped piston 31. In this scheme, the first, second, third and fourth through holes 9, 11, 13 and 15, the moving cavities and the sealing partition plates 19 are arranged to facilitate the control of the communication between the shunt pipe 7 and the first, second, third and fourth recesses 8, 10, 12 and 14. The U-shaped discharging cavity 29, the oil discharge hole 30 and the U-shaped piston 31 are arranged to facilitate the blocking and unblocking of the heat conducting oil.

[0041] Specifically, the sealing partition plate 19 can block and seal the first, second, third and fourth through holes 9, 11, 13 and 15, thereby controlling the flow between the heat conducting oil and the first, second, third and fourth recesses 8, 10, 12 and 14, thereby avoiding the movement of the heat conducting oil after heat conduction. The U-shaped discharging cavity 29 and the oil discharge hole 30 are arranged to facilitate the flow of the heat conducting oil in the first, second, third and fourth recesses 8, 10, 12 and 14 after heat conduction. The U-shaped piston 31 is arranged to block the oil discharge hole 30 to prevent the heat conducting oil from flowing out directly. At the same time, the U-shaped piston 31 generates suction in the first, second, third and fourth recesses 8, 10, 12 and 14, thereby facilitating the flow of the heat conducting oil therein.

[0042] As Figures 3-8As shown, the driving cooling unit comprises a fixed box 20 installed on the top of the fixed frame 6, the side inner wall of the fixed box 20 is rotatably installed with a reversible toothed rod 21, the side of the fixed box 20 is installed with a servo motor 22, one end of the reversible toothed rod 21 extends out of the fixed box 20 and is installed on the output shaft of the servo motor 22, two L-shaped movable blocks 23 are threadedly installed on the reversible toothed rod 21, the bottom of each of the two L-shaped movable blocks 23 is installed with an L-shaped movable plate 24, the side of each of the two L-shaped movable plates 24 is installed with a first trapezoidal block 25, two second trapezoidal blocks 26, two third trapezoidal blocks 27 and a fourth trapezoidal block 28, the first trapezoidal block 25, the two second trapezoidal blocks 26, the two third trapezoidal blocks 27 and the fourth trapezoidal block 28 are staggered, the side of each of the plurality of sealing partitions 19 is installed with a moving rod 17, one end of each of the plurality of moving rods 17 extends out of the fixed frame 6 and is installed with a circular plate, the side of each of the plurality of circular plates is installed with a roller, the fixed frame 6 is provided with elastic elements matched with the plurality of circular plates, the bottom of the fixed frame 6 is installed with a moving box 32, the moving box 32 is provided with a driven unit for moving the L-shaped movable plate 31, the driven unit is installed in cooperation with one of the L-shaped movable plates 24, the top of the oil tank 3 is installed with three supporting columns, the top of the three supporting columns is jointly installed with a treatment tank 42, the side of the treatment tank 42 is fixedly provided with an oil inlet hole, the side of the fixed frame 6 is installed with a second oil pump 40, the output end of the second oil pump 40 is jointly installed with a flow pipe 41 and the oil inlet hole, the top of the oil tank 3 and the bottom of the treatment tank 42 are both provided with fixing holes, the two fixing holes are jointly installed with a drain pipe 47 containing an electric valve, the treatment tank 42 is provided with a cooling element, the cooling element is installed in cooperation with the reversible toothed rod 21, in this scheme, the moving rod 17, the circular plate, the roller, the fixed box 20, the reversible toothed rod 21, the servo motor 22, the L-shaped movable plate 24, the first trapezoidal block 25, the second trapezoidal block 26, the third trapezoidal block 27 and the fourth trapezoidal block 28 are arranged to facilitate the interval movement of the sealing partitions 19 with different heights, the second oil pump 40, the flow pipe 41, the treatment tank 42 and the drain pipe 47 are arranged to facilitate the transfer of the heat conducting oil in the L-shaped discharging cavity 29.

[0043] Specifically, the first trapezoidal block 25, the second trapezoidal block 26, the third trapezoidal block 27 and the fourth trapezoidal block 28 can be moved through the positive and negative toothed rod 21, the servo motor 22 and the L-shaped movable plate 24. The movement of the first trapezoidal block 25, the second trapezoidal block 26, the third trapezoidal block 27 and the fourth trapezoidal block 28 can make the sealing baffle 19 move through the moving rod 17, the circular plate and the roller to seal the first through hole 9, the second through hole 11, the third through hole 13 and the fourth through hole 15 in turn, thereby avoiding the mixing of the heat conducting oil in the first groove 8, the second groove 10, the third groove 12 and the fourth groove 14. The heat conducting oil in the U-shaped discharging cavity 29 can be transferred through the second oil pump 40, the flow pipe 41, the treatment tank 42 and the oil drain pipe 47, thereby facilitating the cooling of the heat conducting oil through the cooling element and then inputting the heat conducting oil into the oil tank 3.

[0044] As shown in Figure 6 , the elastic element includes a plurality of springs 18 mounted on the side wall of the fixed frame 6, and the other end of each spring 18 is mounted on the side of the circular plate. In this scheme, the sealing baffle 19 can be reset through the arrangement of the spring 18.

[0045] Specifically, the moving rod 17 can be reset through the arrangement of the spring 18, and the reset of the moving rod 17 can reset the sealing baffle 19, thereby facilitating subsequent repeated use.

[0046] As shown in Figure 3 and Figure 9 , the driven unit includes a threaded rod 33 rotatably mounted on the opposite inner wall of the moving box 32, an L-shaped threaded block 34 is threadedly sleeved on the threaded rod 33, one end of the L-shaped threaded block 34 extends into the U-shaped discharging cavity 29 and is mounted on the side of the U-shaped piston 31. The bottom of the L-shaped movable plate 24 is provided with an L-shaped moving plate 35, the side of the L-shaped moving plate 35 is provided with a rack 36, a circular gear 37 is sleeved on the threaded rod 33, and the circular gear 37 is engaged with the rack 36. In this scheme, the U-shaped piston 31 can be moved through the arrangement of the threaded rod 33, the L-shaped threaded block 34, the L-shaped moving plate 35, the rack 36 and the circular gear 37.

[0047] Specifically, the L-shaped movable plate 24 can drive the threaded rod 33 to rotate when the heat conduction is completed through the arrangement of the L-shaped moving plate 35, the rack 36 and the circular gear 37. The rotation of the threaded rod 33 can make the U-shaped piston 31 move through the L-shaped threaded block 34, thereby removing the blockage of the oil drain hole 30, so that the heat conducting oil that has completed heat conduction is discharged.

[0048] As shown in Figure 9 , the side of the L-shaped threaded block 34 is provided with a shielding plate 56.

[0049] Specific, through the setting of the shielding plate 56, play a certain protective effect, to avoid the threaded rod 33 affected by the external environment.

[0050] As shown in Figure 11 and Figure 12 cooling element includes a reciprocating screw rod 49 rotatingly installed on the top of the processing tank 42, the reciprocating screw rod 49 is threaded on the lifting plate 50, the lifting plate 50 is provided with a rotating hole, the rotating hole is rotatingly installed with the movable rod 44, the top of the reciprocating screw rod 49 is installed with the first bevel gear 51, the top of the processing tank 42 is installed with the protective box 43, the top of the protective box 43 is provided with a movable hole, the movable hole is rotatingly installed with the annular block 52, the movable rod 44 penetrates through the annular block 52, the circumferential outer wall of the movable rod 44 is installed with two limit blocks 54, the bottom of the annular block 52 is provided with a limit slot matched with the limit block 54, the annular block 52 is sleeved with the second bevel gear 53, one end of the positive and negative toothed rod 21 extends into the protective box 43 and is installed with the third bevel gear 55, the first bevel gear 51 and the second bevel gear 53 are all engaged with the third bevel gear 55, the top of the processing tank 42 is provided with a avoiding hole matched with the movable rod 44, the circumferential outer wall of the movable rod 44 is installed with two cooling pipes 48, the top and bottom of the movable rod 44 are respectively provided with connecting holes communicated with the two cooling pipes 48, the top and bottom of the movable rod 44 are both installed with the rotary joint 45, the other end of the two rotary joints 45 is respectively installed with the movable pipe and the hose, the bottom of the processing tank 42 is provided with a mounting hole, the mounting hole is installed with the fixed pipe 46, the other end of the hose is installed on the top of the fixed pipe 46, in the scheme, through the setting of the movable rod 44, the cooling pipe 48, the connecting hole, the rotary joint 45, the movable pipe, the hose and the fixed pipe 46, the heat conducting oil can be cooled by the external water circulating device, through the setting of the reciprocating screw rod 49, the lifting plate 50, the first bevel gear 51, the annular block 52, the second bevel gear 53, the limit block 54 and the third bevel gear 55, the heat conducting oil at different positions and heights can be cooled.

[0051] Specifically, through the setting of the movable rod 44, the cooling pipe 48, the connecting hole, the rotary joint 45, the movable pipe, the hose and the fixed pipe 46, the processing tank 42 can be water circulated under the cooperation of the external water circulating device, so that the heat conducting oil in the processing tank 42 is cooled, through the setting of the reciprocating screw rod 49, the lifting plate 50, the first bevel gear 51, the annular block 52, the second bevel gear 53, the limit block 54 and the third bevel gear 55, the cooling pipe 48 can move up and down and rotate while the positive and negative toothed rod 21 rotates, so that the heat conducting oil at different positions and heights is cooled, effectively improving the cooling uniformity and heat exchange efficiency.

[0052] As shown in Figure 12As shown, the diameters of the first bevel gear 51 and the second bevel gear 53 are smaller than the diameter of the third bevel gear 55, and in this scheme, the diameter ratio of the first bevel gear 51, the second bevel gear 53 and the third bevel gear 55 facilitates faster rotation of the reciprocating screw rod 49 and the annular block 52, so that the cooling pipe 48 moves up and down and rotates faster, avoiding the influence of slow frequency on the rotation effect.

[0053] As shown in the Figure 12 As shown, the top of the processing tank 42 is provided with a guide rod, and the top of the lifting plate 50 is provided with a guide hole, and the guide rod penetrates the guide hole. In this scheme, the guide rod plays a certain guiding and limiting role, which facilitates the movement of the lifting plate 50 in the horizontal direction.

[0054] As shown in the Figure 2 and Figure 4 As shown, the bottom inner wall of the two first grooves 8, the two second grooves 10, the two third grooves 12 and the top of the two topmost heat-conducting sheets 16 are inclined, and the side of the extruder cylinder 4 is provided with three temperature detectors 57. In this scheme, the bottom inner wall of the first groove 8, the second groove 10, the third groove 12 and the top of the two topmost heat-conducting sheets 16 are inclined, which facilitates the discharge of the heat-conducting oil from the oil drain hole 30, and the temperature detector 57 is arranged to monitor the temperature on the extruder cylinder 4.

[0055] Through the above structure, in use, the heat-conducting oil flows from the oil tank 3 into the shunt pipe 7 through the isolation heat-conducting circulating assembly, and then flows into the first groove 8 through the isolation heat-conducting circulating assembly, and then the first groove 8 is sealed, and the second groove 10 is unsealed, at this time the heat-conducting oil enters the second groove 10, and when it enters, the second groove 10 is sealed, and the third groove 12 is unsealed, at this time the heat-conducting oil enters the third groove 12, and the first groove 8 is still in the sealed state, and then the third groove 12 is sealed, and the fourth groove 14 is unsealed, at this time the heat-conducting oil enters the fourth groove 14, and the first groove 8, the second groove 10 and the third groove 12 are in the sealed state. The heat-conducting oil entering the first groove 8, the second groove 10, the third groove 12 and the fourth groove 14 is divided to absorb heat through the heat-conducting sheets 16, so as to separate and heat-conduct the four sides of the extruder cylinder 4, avoiding the direct heat absorption of the heat-conducting oil and affecting the overall cooling effect.

[0056] Optionally, the fixed frame 6 is made of cast iron, the depths of the first groove 8, the second groove 10, the third groove 12 and the fourth groove 14 are 15mm, and the widths are 20mm, and the inner walls of the grooves are sprayed with ceramic coating to enhance wear resistance. The heat-conducting sheets 16 are copper alloy, which are fixed in the inner walls of the grooves through bolts to ensure close contact with the extruder cylinder 4.

[0057] The rated power of the servo motor 22 driving the cooling unit is 0.5 kW, and the rotating speed is 1500 rpm; the pitch of the positive and negative toothed rod 21 is 5 mm, and the stroke is 200 mm; the moving speed of the L-shaped movable plate 24 is adjusted by a PID controller (range 0.1-0.5 m / s). The inner diameter of the cooling pipe 48 of the movable rod 44 is 8 mm, and the wall thickness is 1.5 mm; the flow rate of the external water circulation system is set to 5 L / min, and the water inlet temperature is ≤25℃; the rotary joint 45 is made of stainless steel;

[0058] The temperature detector 57 monitors the temperature of the extruder barrel 4 in real time, and the threshold is set to 200℃. When the temperature exceeds the threshold, the microprocessor starts the first oil pump 38 and the servo motor 22. The microprocessor can optionally use an ARM Cortex-M4 core, run a PID algorithm and a machine learning module (training data comes from historical temperature records). The sampling frequency of the temperature detector 57 is 100 Hz, and the accuracy is ±0.5℃.

[0059] The first oil pump 38 draws heat-conducting oil from the oil tank 3, injects it into the shunt pipe 7 through the connecting pipe 39, and controls the flow rate at 10 L / min.

[0060] The servo motor 22 drives the positive and negative toothed rod 21 to rotate clockwise, and the L-shaped movable plate 24 moves to the right. The first trapezoidal block 25 presses the roller, and the movable rod 17 pushes the sealing partition plate 19 to block the first through hole 9. The heat-conducting oil only enters the first groove 8.

[0061] After the heat absorption is completed, the L-shaped movable plate 24 drives the threaded rod 33 through the rack 36 and the circular gear 37, so that the back-shaped piston 31 moves and opens the oil drain hole 30. The heat-conducting oil flows into the back-shaped discharge cavity 29 under the action of gravity, and the second oil pump 40 pumps the oil into the treatment tank 42 through the flow pipe 41.

[0062] In the cooling element, the movable rod 44 is driven by the reciprocating screw rod 49, and the cooling pipe 48 is cooled by water circulation. After cooling, the oil returns to the oil tank 3 through the oil drain pipe 47.

[0063] Example 2:

[0064] The servo motor 22 is replaced by a stepper motor, the reciprocating screw rod 49 of the cooling element is driven by an independent stepper motor, the rotating speed range is 5-30 rpm, pressure sensors are added in the oil drain hole 30 and the treatment tank 42 to monitor the flow resistance of the oil. When the barrel temperature is <150℃, only the first groove 8 and the third groove 12 are started. When the temperature is >200℃, all grooves are operated, the moving speed of the sealing partition plate 19 is adaptively adjusted according to the temperature gradient, and after the temperature is stable, the electric valve part of the oil drain pipe 47 is partially closed to maintain the minimum circulation.

[0065] The working principle of the device is as follows: before use, first place the heat-conducting oil into the oil tank 3, then connect the movable pipe and the fixed pipe 46 with the external cooling water circulating device, and then start the heating jacket 5. The start of the heating jacket 5 will make the heating rod inside the heating jacket 5 heat the raw materials inside the extruder barrel 4, so as to process the raw materials.

[0066] When the temperature is too high, the temperature detector 57 detects and sends a signal, at which time the servo motor 22 and the first oil pump 38 output, and the first oil pump 38 output will input the heat conducting oil in the oil tank 3 into the distribution pipe 7 through the connecting pipe 39, at which time the second trapezoidal block 26, the third trapezoidal block 27 and the fourth trapezoidal block 28 are extruded, and the three pairs of sealing partitions 19 located above block the second through hole 11, the third through hole 13 and the fourth through hole 15 respectively, so that the heat conducting oil can only enter the first recess 8 through the first through hole 9, and meanwhile the output of the servo motor 22 will make the positive and negative thread rod 21 rotate, which will make the two L-shaped movable blocks 23 move away from each other under the block of the fixed box 20, and the movement of the two L-shaped movable blocks 23 will make the two L-shaped movable plates 24 move, and the movement of the two L-shaped movable plates 24 will make the two first trapezoidal blocks 25, the four second trapezoidal blocks 26, the four third trapezoidal blocks 27 and the fourth trapezoidal block 28 move, and the movement of the first trapezoidal block 25 will make the sealing partition 19 move through the extrusion of the roller and the movement of the rod 17, thereby blocking the first through hole 9, and when the first through hole 9 is blocked, the roller is in contact with the vertical surface of the first trapezoidal block 25, at which time the inclined surface of one of the second trapezoidal blocks 26 is in contact with the roller at the same horizontal level, and then the movement of the L-shaped movable plate 24 will make the one of the second trapezoidal blocks 26 gradually extrude the roller, at which time the sealing partition 19 at the same level will move under the action of the movement rod 17 and the spring 18, thereby unblocking the second through hole 11, and the unblocking of the second through hole 11 will make the heat conducting oil enter the second recess 10, at which time the third trapezoidal block 27 still extrudes the roller at the same horizontal level, and then the continuous movement of the L-shaped movable plate 24 will make the same horizontal level of the roller extruded again by the other second trapezoidal block 26, thereby making the sealing partition 19 seal the second through hole 11 again, at which time the inclined surface of one of the third trapezoidal blocks 27 is in contact with the roller at the same horizontal level, and then the continuous movement of the L-shaped movable plate 24 will make the third through hole 13 unblocked under the action of the spring 18 and the sealing partition 19 at the same horizontal level, and the unblocking of the third through hole 13 will make the heat conducting oil enter the third recess 12, and then the continuous movement of the L-shaped movable plate 24 will make the sealing partition 19 reset by the other third trapezoidal block 27, thereby blocking the third through hole 13, and when the third through hole 13 is blocked again, the inclined surface of the fourth trapezoidal block 28 is in contact with the roller at the same level, and then the continuous movement of the L-shaped movable plate 24 will make the sealing partition 19 unblock the fourth through hole 15 under the action of the spring 18, and the unblocking of the fourth through hole 15 will make the heat conducting oil enter the fourth recess 14, thereby making the heat conducting oil contact the heat conducting fins 16 at different positions, and then the first oil pump 38 stops the delivery of the heat conducting oil, and meanwhile the movement of the L-shaped movable plate 24 will make the rack 36 move through the L-shaped movable plate 35, and when the first oil pump 38 stops outputting, the rack 36 is in mesh with the circular gear 37,At this time, the L-shaped movable plate 24 continues to move to make the circular gear 37 rotate through the rack 36, the circular gear 37 rotates to make the threaded rod 33 rotate, the threaded rod 33 rotates to make the L-shaped threaded block 34 move under the limiting of the inner wall of the moving box 32, the L-shaped threaded block 34 moves to cancel the plugging of the oil drain hole 30, at this time, the heat conducting oil flows into the back-shaped discharging cavity 29, and then the servo motor 22 reversely outputs, the servo motor 22 reversely outputs to make the two L-shaped movable plates 24 reset and move through the positive and negative toothed rod 21 and the two L-shaped movable blocks 23, the two L-shaped movable plates 24 reset and move to make the threaded rod 33 reversely rotate through the rack 36 and the circular gear 37, the threaded rod 33 reversely rotates to make the back-shaped piston 31 reset through the L-shaped threaded block 34, and the L-shaped movable plate 24 resets and moves to make the two first trapezoidal blocks 25, the four second trapezoidal blocks 26, the four third trapezoidal blocks 27 and the fourth trapezoidal block 28 reset, and then the above operation is repeated to conduct heat conduction cooling, so that the four sides of the extruder barrel 4 are divided and heat-conducted to circulate and cool, avoiding that the heat conducting oil directly absorbs heat and flows to affect the overall cooling effect.

[0067] When the heat conducting oil after heat conduction enters the back-shaped discharging cavity 29, the second oil pump 40 starts, the second oil pump 40 starts to input the heat conducting oil in the back-shaped discharging cavity 29 into the treatment tank 42 through the flow pipe 41, at this time, the external cooling water circulating device is started, the external cooling water circulating device outputs to input the cooling water into the connecting hole of the movable rod 44 through the movable pipe and the rotary joint 45, then the cooling water continues to move and is discharged from the fixed pipe 46 through the cooling pipe 48, another connecting hole, another rotary joint 45 and the hose, so as to make the cooling water circulate to cool the heat conducting oil, and the positive and negative toothed rod 21 rotates to make the third bevel gear 55 rotate, the third bevel gear 55 rotates to make the first bevel gear 51 and the second bevel gear 53 rotate, the first bevel gear 51 rotates to make the reciprocating screw rod 49 rotate, the reciprocating screw rod 49 rotates to make the lifting plate 50 move up and down under the action of the guide rod, the lifting plate 50 moves up and down to make the movable rod 44 move up and down, the movable rod 44 moves up and down to make the cooling pipe 48 move up and down, and the second bevel gear 53 rotates to make the annular block 52 rotate, the annular block 52 rotates to make the movable rod 44 rotate under the action of the limiting block 54 and the limiting groove, the movable rod 44 rotates to make the cooling pipe 48 circularly move, so as to make the cooling pipe 48 circularly move while moving up and down, thereby cooling the heat conducting oil at different positions and heights, effectively improving cooling uniformity and heat exchange efficiency, when the cooling is completed, the cooled heat conducting oil reenters the oil tank 3 through the electric valve and the oil drain pipe 47.

[0068] The above embodiments only express one or several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A combined temperature control mechanism for a hot melt extruder, comprising a machine base (1), characterized in that: The machine base (1) is fixedly provided with a shell (2), an oil tank (3) and an extruder barrel (4). Three heating jackets (5) and three fixed frames (6) are fixedly sleeved on the extruder barrel (4). Each of the three fixed frames (6) is provided with an interval heat conduction mechanism. The spaced heat conduction mechanism includes a diversion pipe (7) installed on the top of the fixed frame (6). The bottom inner wall of the fixed frame (6) has two first grooves (8). The opposite inner walls of the fixed frame (6) are provided with second grooves (10) and third grooves (12). The top inner wall of the fixed frame (6) has two fourth grooves (14). The opposite inner walls of the two first grooves (8), two second grooves (10), two third grooves (12) and two fourth grooves (14) are all equipped with heat conduction plates (16). The side of the oil tank (3) is equipped with a first oil pump (38). The output end of the first oil pump (38) and the inlet end of the diversion pipe (7) are connected by a connecting pipe (39). The fixed frame (6) is provided with an isolation heat conduction circulation assembly adapted to the diversion pipe (7). The heat-conducting isolation circulation assembly includes a first through hole (9), a second through hole (11), and a third through hole (13) respectively connected to two first grooves (8), two second grooves (10), and two third grooves (12) on the outer walls of both sides of the fixed frame (6). The top of the fixed frame (6) has two fourth through holes (15) respectively adapted to two fourth grooves (14). Multiple output ends of the shunt pipe (7) are respectively connected to the two first through holes (9), two second through holes (11), two third through holes (13), and two fourth through holes (15). The fixed frame (6) has openings respectively connected to the two first through holes (9), two second through holes (11), two third through holes (12), and two fourth through holes (13). 11) A movable cavity connected by two third through holes (13) and two fourth through holes (15) is provided. Sealing partitions (19) are movably installed in multiple movable cavities. A circular discharge cavity (29) is provided on the fixed frame (6). Oil drain holes (30) connected to the circular discharge cavity (29) are provided on the inner side walls of the two first grooves (8), two second grooves (10), two third grooves (12) and two fourth grooves (14). A circular piston (31) is movably installed in the circular discharge cavity (29). A drive cooling unit is provided on the fixed frame (6) to make multiple sealing partitions (19) move sequentially from bottom to top and to make the circular piston (31) move. The drive cooling unit includes a fixed box (20) mounted on the top of the fixed frame (6). A positive and negative threaded rod (21) is rotatably mounted on the inner side wall of the fixed box (20). A servo motor (22) is mounted on the side of the fixed box (20). One end of the positive and negative threaded rod (21) extends outside the fixed box (20) and is mounted on the output shaft of the servo motor (22). Two L-shaped movable blocks (23) are threaded on the positive and negative threaded rod (21). The bottom of the two L-shaped movable blocks (23) Each part is equipped with an L-shaped movable plate (24). The sides of each L-shaped movable plate (24) are equipped with a first trapezoidal block (25), two second trapezoidal blocks (26), two third trapezoidal blocks (27), and a fourth trapezoidal block (28). These trapezoidal blocks are staggered. The sides of multiple sealing partitions (19) are equipped with moving rods (17). The moving rods (17)... One end extends to the outside of the fixed frame (6) and is equipped with a circular plate. Rollers are installed on the sides of the multiple circular plates. The fixed frame (6) is provided with elastic elements that are compatible with the multiple circular plates. A movable box (32) is installed at the bottom of the fixed frame (6). A driven unit that moves the return piston (31) is provided on the movable box (32). The driven unit is installed in conjunction with one of the L-shaped movable plates (24). Three support columns are installed on the top of the oil tank (3). A common feature is installed on the top of the three support columns. The treatment tank (42) has an oil inlet hole fixed on its side. A second oil pump (40) is installed on the side of the fixed frame (6). The output end of the second oil pump (40) and the oil inlet hole are connected to a flow pipe (41). The top of the oil tank (3) and the bottom of the treatment tank (42) are both provided with fixed holes. A drain pipe (47) containing an electric valve is installed on both fixed holes. A cooling element is provided on the treatment tank (42). The cooling element is installed in conjunction with the positive and negative threaded rod (21).

2. The combined temperature control mechanism for the hot melt extruder according to claim 1, characterized in that, The elastic element includes multiple springs (18) mounted on the side wall of the fixed frame (6), and the other ends of the multiple springs (18) are respectively mounted on the side of multiple circular plates.

3. The combined temperature control mechanism for the hot melt extruder according to claim 1, characterized in that, The driven unit includes a threaded rod (33) rotatably mounted on the inner wall of the movable box (32), an L-shaped threaded block (34) threaded on the threaded rod (33), one end of the L-shaped threaded block (34) extending into the reciprocating discharge chamber (29) and mounted on the side of the reciprocating piston (31), an L-shaped moving plate (35) mounted on the bottom of the L-shaped movable plate (24), a rack (36) mounted on the side of the L-shaped moving plate (35), a spur gear (37) mounted on the threaded rod (33), and the spur gear (37) meshing with the rack (36).

4. The combined temperature control mechanism for the hot melt extruder according to claim 3, characterized in that, A baffle plate (56) is installed on the side of the L-shaped threaded block (34).

5. The combined temperature control mechanism for the hot melt extruder according to claim 1, characterized in that, The cooling element includes a reciprocating screw (49) rotatably mounted on the top of the processing tank (42). A lifting plate (50) is threaded onto the reciprocating screw (49). A rotating hole is opened on the lifting plate (50), and a movable rod (44) is rotatably mounted on the rotating hole. A first bevel gear (51) is installed at the top of the reciprocating screw (49). A protective box (43) is installed on the top of the processing tank (42). A movable hole is opened on the top of the protective box (43), and an annular block (52) is rotatably mounted on the movable hole. The movable rod (44) passes through the annular block (52). Two limiting blocks (54) are installed on the outer periphery of the movable rod (44). A limiting groove adapted to the limiting block (54) is opened at the bottom of the annular block (52). A second bevel gear (53) is sleeved on the annular block (52). One end of 21) extends into the protective box (43) and is equipped with a third bevel gear (55). The first bevel gear (51) and the second bevel gear (53) mesh with the third bevel gear (55). The top of the treatment tank (42) is provided with a clearance hole that matches the movable rod (44). Two cooling pipes (48) are installed on the outer wall of the periphery of the movable rod (44). The top and bottom of the movable rod (44) are respectively provided with connection holes that connect to the two cooling pipes (48). Rotary joints (45) are installed at the top and bottom of the movable rod (44). The other ends of the two rotary joints (45) are respectively provided with movable pipes and hoses. The bottom of the treatment tank (42) is provided with an installation hole. A fixed pipe (46) is installed on the installation hole. The other end of the hose is installed on the top of the fixed pipe (46).

6. The combined temperature control mechanism for the hot melt extruder according to claim 5, characterized in that, The diameters of the first bevel gear (51) and the second bevel gear (53) are both smaller than the diameter of the third bevel gear (55).

7. The combined temperature control mechanism for the hot melt extruder according to claim 5, characterized in that, The top of the processing tank (42) is equipped with a guide rod, and the top of the lifting plate (50) is provided with a guide hole, through which the guide rod passes.

8. The combined temperature control mechanism for the hot melt extruder according to claim 1, characterized in that, The bottom inner walls of the two first grooves (8), the two second grooves (10), the two third grooves (12) and the top of the two uppermost heat-conducting plates (16) are all inclined, and three temperature detectors (57) are installed on the side of the extruder barrel (4).

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