阅读说明：本技术 串联式聚合物发泡挤出加工用三阶挤出装置 (Three-order extrusion device for series polymer foaming extrusion processing ) 是由 陈志强 于 2020-11-02 设计创作，主要内容包括：本发明涉及一种串联式聚合物发泡挤出加工用三阶挤出装置,包括加热塑化原料的一阶挤出机,一阶挤出机上设有原料喂料机,一阶挤出机的出料端连接有向原料内增加助剂的二阶挤出机,二阶挤出机上设有助剂喂料机；二阶挤出机的输出端连接有冷却均化原料的三阶挤出机。将一阶挤出机、二阶挤出机以及三阶挤出机依次连接,二阶挤出机可以专门用于混合原料以及助剂,可以最大程度上确保原料与助剂之间的混合效果,确保助剂能够均匀的混合在原料内,从而保证产品质量,三个挤出机的转速以及长径比均可以自由调节,可以根据当前原料以及步骤需要,选择最适合当前阶段转速以及挤出机参数,使得每个步骤的加工效果均可以达到最好。(The invention relates to a three-order extrusion device for series polymer foaming extrusion processing, which comprises a first-order extruder for heating and plasticizing raw materials, wherein the first-order extruder is provided with a raw material feeding machine; the output end of the second-order extruder is connected with a third-order extruder for cooling and homogenizing the raw materials. The first-order extruder, the second-order extruder and the third-order extruder are connected in sequence, the second-order extruder can be specially used for mixing raw materials and auxiliaries, the mixing effect between the raw materials and the auxiliaries can be ensured to the maximum extent, the auxiliaries can be uniformly mixed in the raw materials, the product quality is ensured, the rotating speed and the length-diameter ratio of the three extruders can be freely adjusted, the most suitable rotating speed and extruder parameters at the current stage can be selected according to the requirements of the current raw materials and the steps, and the processing effect of each step can be best.)

1. The utility model provides a series connection polymer foaming extrusion processing is with three-order extrusion device, includes first-order extruder (1) of heating plastify raw materials, be equipped with raw materials feeder (11) on first-order extruder (1), its characterized in that: the discharge end of the first-order extruder (1) is connected with a second-order extruder (2) for adding an auxiliary agent into the raw material, and an auxiliary agent feeder (21) is arranged on the second-order extruder (2); the output end of the second-order extruder (2) is connected with a third-order extruder (3) for cooling and homogenizing raw materials.

2. The tandem polymer foaming extrusion process three-stage extrusion apparatus of claim 1, wherein: a polymer melt cooler (12) is arranged between the first-order extruder (1) and the second-order extruder (2).

3. The tandem polymer foaming extrusion process three-stage extrusion apparatus according to claim 1 or 2, wherein: the discharge end of the three-stage extruder (3) is connected with a static mixer (31), and the rear end of the static mixer (31) is connected with a die (32).

4. The tandem polymer foaming extrusion process three-stage extrusion apparatus of claim 3, wherein: the length-diameter ratio of the first-order extruder (1) is 16: 1-32: 1, the length-diameter ratio of the second-order extruder (2) is 24: 1-64: 1, the length-diameter ratio of the third-order extruder (3) is 16: 1-36: 1, and the rotating speed of the second-order extruder (2) is lower than that of the first-order extruder (1).

5. The tandem polymer foaming extrusion process three-stage extrusion apparatus of claim 1, wherein: the barrel of three-order extruder (3) comprises inner tube (4) and urceolus (5) that cup joint each other, be equipped with cooling runner (41) that are the spiral setting on inner tube (4) the peripheral face, the both ends of urceolus (5) are equipped with feed liquor pipe (51) and drain pipe (52), feed liquor pipe (51) and drain pipe (52) are linked together with cooling runner (41) both ends respectively, it has heat exchanger and cooling pump to establish ties between feed liquor pipe (51) and drain pipe (52), still including the liquid reserve tank of storing coolant, the cooling pump is placed in the liquid reserve tank.

6. The tandem polymer foaming extrusion process three-stage extrusion apparatus of claim 5, wherein: the cooling cover is characterized in that a cooling cover (6) is arranged on the outer cover of the outer barrel (5), the cooling cover (6) is arranged around the outer barrel (5), an axial flow fan (7) is arranged on the cooling cover (6), an air inlet hole (71) communicated with an air outlet of the axial flow fan (7) is formed in the cooling cover (6), the axial flow fan (7) is of a plurality of air inlets and a plurality of air outlets, the axial flow fan (7) is arranged on the cooling cover (6) along the length direction of the cooling cover (6), and a plurality of air supply holes (72) for air to flow out are formed in the cooling cover (6).

7. The tandem polymer foaming extrusion process three-stage extrusion apparatus of claim 5, wherein: the vertical cross section of cooling cover (6) is regular octagon setting, axial fan (7) are two and the symmetry sets up in cooling cover (6) both sides, ventilation hole (72) set up on the top surface and the bottom surface of cooling cover (6), cooling cover (6) comprise the left cover body (61) and the right cover body (62) that the symmetry set up, the left cover body (61) and the right cover body (62) set up about barrel length direction symmetry, the left cover body (61) and the right cover body (62) pass through hasp (63) fixed connection.

8. The tandem polymer foaming extrusion process three-stage extrusion apparatus according to claim 6 or 7, wherein: the two ends of the cooling cover (6) are provided with a plurality of rollers (64) in an array around the circumference of the outer barrel (5), rotating shafts of the rollers (64) are arranged in parallel with the axis of the outer barrel (5), protruding rings (8) are arranged at the two ends of the cooling cover (6) on the outer circumferential surface of the outer barrel (5), annular grooves (91) matched with the protruding rings (8) are arranged at the two ends of the cooling cover (6), conducting rings (81) connected with a power supply are arranged on the side surfaces of the protruding rings (8), conducting strips (92) in contact with the conducting rings (81) are arranged on the annular grooves (91), and the axial flow fan (7) is electrically connected with the conducting strips (92); the cooling device also comprises a driving system for driving the cooling cover (6) to rotate.

9. The tandem polymer foaming extrusion process three-stage extrusion apparatus of claim 8, wherein: the driving system comprises gear teeth (82) arranged on the outer peripheral surface of the convex ring (8), the gear teeth (82) are circumferentially arranged on the convex ring (8), a gear (65) meshed with the gear teeth (82) is rotatably connected to the cooling cover (6), and a driving piece for driving the gear (65) to rotate is arranged on the cooling cover (6).

10. The tandem polymer foaming extrusion process three-stage extrusion apparatus of claim 9, wherein: the two ends of the cooling cover (6) are provided with connecting rings (9) which are annularly arranged around the convex rings (8), the annular grooves (91) are formed in the inner surfaces of the connecting rings (9), the side surfaces of the connecting rings (9) are connected with positioning pins (93) in a sliding mode along the axial direction of the outer barrel (5), and positioning holes (83) matched with the positioning pins (93) are formed in the convex rings (8).

Technical Field

The invention relates to the technical field of polymer foaming extrusion equipment, in particular to a three-order extrusion device for series polymer foaming extrusion processing.

Background

The manufacturing method of the prior foaming product comprises the following steps: carbon dioxide or inert gas is introduced into the polymer melt by conventional processing equipment, such as extruders, injection molding machines, block presses, etc., to mix the polymer melt uniformly, and after pressure relief, the dissolved gas in the melt expands to produce a foamed product.

The utility model provides a notice number is CN 209095860U's utility model provides a foaming extruder, including the barrel, the barrel is including the reinforced section that connects gradually, the section of admitting air, extrude the section, is equipped with the screw rod in the barrel, and one side of keeping away from the section of admitting air with the reinforced section is connected with drive screw rod pivoted drive arrangement, and in the during operation, the raw materials got into the barrel from reinforced section, and the raw materials melts and extends in the barrel under the drive of screw rod, and the foamer gets into the barrel from the section of admitting air, and foamer and raw materials mix the back in the barrel, extrude from extruding the section to form the foaming product.

However, in the screw extruder in the prior art, the melting of the raw material and the mixing of the raw material and the foaming agent are all completed in one barrel, and the mixing effect of the raw material and the foaming agent is not good due to the fact that the length of the barrel cannot be too long and the retention time of the raw material in the barrel is limited, so that after foaming and forming, pores in the raw material are not uniformly distributed, and the product quality cannot be effectively guaranteed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a three-order extrusion device for series polymer foaming extrusion processing, wherein a foaming agent and raw materials are uniformly mixed, and the product quality can be effectively ensured.

The above object of the present invention is achieved by the following technical solutions: a three-order extrusion device for series polymer foaming extrusion processing comprises a first-order extruder for heating and plasticizing raw materials, wherein a raw material feeding machine is arranged on the first-order extruder, a second-order extruder for adding auxiliaries into the raw materials is connected to the discharge end of the first-order extruder, and an auxiliary feeding machine is arranged on the second-order extruder; the output end of the second-order extruder is connected with a third-order extruder for cooling and homogenizing the raw materials.

Through adopting above-mentioned technical scheme, connect gradually first order extruder, second order extruder and third-order extruder, the second order extruder can be used for mixing raw materials and auxiliary agent specially, can ensure the mixed effect between raw materials and the auxiliary agent to the at utmost, ensures that the auxiliary agent can be even mixes in the raw materials to guarantee product quality. The first-order extruder, the second-order extruder and the third-order extruder can respectively process raw materials in different steps, the rotating speed and the length-diameter ratio of the three extruders can be freely adjusted, and the most suitable rotating speed and extruder parameters in the current stage can be selected according to the current raw materials and step requirements during production, so that the processing effect of each step can be best, and the product quality and the production efficiency are effectively guaranteed.

The invention is further configured to: and a polymer melt cooler is arranged between the first-order extruder and the second-order extruder.

Through adopting above-mentioned technical scheme, polymer fuse-element cooler can cool off the raw materials that get into the second order extruder, and the raw materials gets into the second order extruder again after suitably cooling down, and the auxiliary agent is after adding into the raw materials like this, can effectively improve product property ability, guarantees product quality, and in addition, polymer fuse-element cooler can be as required, select to open or close, when need not cooling down the raw materials, close my cooler with polymerization can, improve production process's adaptability.

The invention is further configured to: the discharge end of the third-order extruder is connected with a static mixer, and the rear end of the static mixer is connected with a die.

By adopting the technical scheme, the static mixer not only can stably realize the output of the raw materials, but also can mix the products output from the three-stage extruder again, further improves the mixing effect of the raw materials and the auxiliary agent, can replace dies of different models aiming at different products, has strong adaptability,

the invention is further configured to: the length-diameter ratio of the first-order extruder is 16: 1-32: 1, the length-diameter ratio of the second-order extruder is 24: 1-64: 1, the length-diameter ratio of the third-order extruder is 16: 1-36: 1, and the rotating speed of the second-order extruder is lower than that of the first-order extruder.

Through adopting above-mentioned technical scheme, first order extruder sets up for a short time, heating power is big, the melting plastify of realization raw materials that can be very rapid, the rotational speed of second order extruder is less than first order extruder, second order extruder length is longer, the time that the raw materials stayed in the second order extruder just is longer like this, the mixture of realization raw materials that can be more abundant even, single screw extruder is chooseed for use to the third order extruder, the length of third order extruder is moderate, under the condition of guaranteeing raw materials cooling efficiency, the output of stable realization raw materials.

The invention is further configured to: the barrel of three-order extruder comprises inner tube and urceolus that cup joints each other, be equipped with the cooling runner that is the spiral setting on the inner tube periphery, the both ends of urceolus are equipped with feed liquor pipe and drain pipe, feed liquor pipe and drain pipe are linked together with the cooling runner both ends respectively, it has heat exchanger and cooling pump to establish ties between feed liquor pipe and the drain pipe, still including the liquid reserve tank of storing coolant, the cooling pump is placed in the liquid reserve tank.

Through adopting above-mentioned technical scheme, in the coolant pump carried the coolant in the liquid reserve tank to the cooling runner, coolant absorbed heat to realize the cooling of raw materials, coolant goes into the heat exchanger after the drain pipe output, and the heat exchanger cools off the coolant liquid of following the interior output of cooling runner, and the heat exchanger is connected with the liquid reserve tank, and the coolant liquid after the cooling of following output in the heat exchanger gets into the liquid reserve tank again for use.

The invention is further configured to: the outer cover of the outer barrel is provided with a cooling cover, the cooling cover surrounds the outer barrel, the cooling cover is provided with an axial flow fan, the cooling cover is provided with an air inlet hole communicated with an air outlet of the axial flow fan, the axial flow fan is a plurality of, the axial flow fan is arranged on the cooling cover along the length direction of the cooling cover in an array mode, and the cooling cover is provided with a plurality of air vents for air to flow out.

Through adopting above-mentioned technical scheme, at the during operation, axial fan and ventilation hole cooperation, produce stable air current in the cooling jacket, the air current is when flowing, can take away the heat on urceolus surface, cool off the urceolus, outer cooling system can assist interior cooling system, cool off the urceolus, the load of interior cooling system will obtain reducing like this, the temperature of the coolant who exports in the play liquid pipe can obtain effectual reduction, the volume of heat exchanger has not only been reduced like this, the load of cooling pump also can be reduced simultaneously, the life of cooling pump has been prolonged, reduce the energy consumption.

The invention is further configured to: the cooling cover is characterized in that the vertical section of the cooling cover is in a regular octagon shape, the axial flow fans are arranged on two sides of the cooling cover in two rows and symmetrically, the ventilation holes are formed in the top surface and the bottom surface of the cooling cover, the cooling cover is composed of a left cover body and a right cover body which are symmetrically arranged, the left cover body and the right cover body are symmetrically arranged relative to the length direction of the machine barrel, and the left cover body and the right cover body are fixedly connected through a hasp.

By adopting the technical scheme, the two rows of axial flow fans are symmetrically arranged on two sides of the cooling cover, and the vent holes are formed in the top surface and the bottom surface of the cooling cover, so that airflow blown out by the axial flow fans can be discharged from the top surface and the bottom surface of the cooling cover, and the hot airflow in the cooling cover can be stably discharged. When the cooling cover is required to be cleaned or replaced, the left cover body and the right cover body can be separated only by opening the hasp, so that the cooling cover is detached.

The invention is further configured to: the two ends of the cooling cover are provided with a plurality of rollers in a circumferential array around the outer cylinder, the rotating shafts of the rollers are arranged in parallel with the axis of the outer cylinder, the outer peripheral surface of the outer cylinder is provided with convex rings at the two ends of the cooling cover, the two ends of the cooling cover are provided with annular grooves matched with the convex rings, the side surfaces of the convex rings are provided with conducting rings connected with a power supply, the annular grooves are provided with conducting strips contacted with the conducting rings, and the axial flow fan is electrically connected with the conducting strips; the cooling hood further comprises a driving system for driving the cooling hood to rotate.

Through adopting above-mentioned technical scheme, through setting up the gyro wheel, the cooling cover can rotate by the urceolus relatively, axial fan can carry out all-round cooling to the urceolus like this, further improve axial fan's cooling effect, actuating system can drive the cooling cover and rotate, the stability of heat dissipation process is improved, after the installation finishes, the conducting strip can contact with the conducting ring, thereby stable realization axial fan's power supply, and set up the conducting strip in the ring channel, the ring channel can play sheltering from and guard action to the conducting strip, the security of improvement use.

The invention is further configured to: the driving system comprises gear teeth arranged on the outer peripheral surface of the convex ring, the gear teeth are circumferentially arranged on the convex ring in an array mode, a gear meshed with the gear teeth is rotatably connected to the cooling cover, and a driving piece for driving the gear to rotate is arranged on the cooling cover.

Through adopting above-mentioned technical scheme, the during operation, driving piece drive gear rotates, because gear and teeth of a cogwheel meshing and the bulge loop is fixed, consequently the cooling cover both can be driven and rotate simple structure, convenient operation.

The invention is further configured to: the cooling cover is characterized in that connecting rings which are arranged annularly are arranged at two ends of the cooling cover around the convex rings, the annular grooves are formed in the inner surfaces of the connecting rings, positioning pins are connected to the side surfaces of the connecting rings in a sliding mode along the axial direction of the outer cylinder, and positioning holes matched with the positioning pins are formed in the convex rings.

By adopting the technical scheme, when the cooling cover does not need to be rotated, the driving piece is closed, the positioning pin is inserted into the positioning hole, the rotation of the cooling cover can be limited, and the cooling cover is fixed on the outer barrel.

In summary, the invention includes at least one of the following beneficial technical effects:

1. by adopting a three-stage extrusion mode, the second-stage extruder can be specially used for mixing raw materials and additives, the mixing effect between the raw materials and the additives can be ensured to the maximum extent, and the mixing temperature and the rotating speed of the second-stage extruder can be adjusted, so that the method can adapt to the addition and mixing of more additives;

2. the barrel of the three-order extruder is cooled by adopting the combination of two modes of cooling medium and axial flow fan, so that the cooling effect can be effectively improved.

Drawings

Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention.

FIG. 2 is a schematic view of the cooling jacket and the outer cylinder according to the second embodiment of the present invention.

Fig. 3 is an exploded view of the assembly of fig. 2 (inner barrel separated from outer barrel).

Fig. 4 is a vertical sectional view of fig. 2.

Fig. 5 is an enlarged view of a portion a in fig. 4.

Fig. 6 is a schematic view of the structure of the convex ring of the present invention.

Fig. 7 is a schematic view of a wind rotor installation according to a third embodiment of the invention.

In the figure, 1, a first-order extruder; 11. a raw material feeder; 12. a polymer melt cooler; 2. a second order extruder; 21. an additive feeder; 3. a third-order extruder; 31. a static mixer; 32. a mold; 4. an inner barrel; 41. a cooling flow channel; 5. an outer cylinder; 51. a liquid inlet pipe; 52. a liquid outlet pipe; 53. an annular rib; 6. a cooling jacket; 61. a left cover body; 611. positioning a groove; 62. a right cover body; 621. positioning blocks; 63. a hasp; 64. a roller; 65. a gear; 66. a motor; 7. an axial flow fan; 71. an air inlet hole; 72. a vent hole; 8. a convex ring; 81. conducting rings; 82. gear teeth; 83. positioning holes; 9. a connecting ring; 91. an annular groove; 92. a conductive sheet; 93. positioning pins; 10. a wind wheel; 101. a wheel axle; 102. a blade.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

referring to fig. 1, the invention discloses a three-order extrusion device for series polymer foaming extrusion processing, which comprises a first-order extruder 1, wherein the discharge end of the first-order extruder 1 is connected with a second-order extruder 2, the discharge end of the second-order extruder 2 is connected with a third-order extruder 3, the first-order extruder 1 is connected with a raw material feeder 11, the raw material feeder 11 feeds the raw material into the first-order extruder 1, and the raw material is heated and plasticized in the first-order extruder 1 to form a molten state and then enters the second-order extruder 2; the second-order extruder 2 is connected with an auxiliary agent feeder 21, the auxiliary agent feeder 21 can feed auxiliary agents into the second-order extruder 2, the raw materials in a molten state and the auxiliary agents are mixed in the second-order extruder 2, the mixed raw materials enter the third-order extruder 3, the raw materials are cooled and homogenized in the third-order extruder 3, and finally finished products are formed and output from the third-order extruder 3.

Referring to fig. 1, a first-order extruder 1, a second-order extruder 2 and a third-order extruder 3 are connected in sequence, the second-order extruder 2 can be specially used for mixing raw materials and additives, the mixing effect between the raw materials and the additives can be ensured to the greatest extent, the additives can be uniformly mixed in the raw materials, and therefore the product quality is ensured. First order extruder 1, second order extruder 2 and third order extruder 3 can carry out the processing of different steps to the raw materials respectively, the rotational speed and the slenderness ratio of three extruder all can freely be adjusted, in production, can be according to current raw materials and step needs, select most suitable current stage rotational speed and extruder parameter, for example, the rotational speed and the temperature of first order extruder 1 can be transferred to higher state, can realize the heating plastify of raw materials fast like this, make the processing effect of every step all can reach the best, and then effectual assurance product quality and production efficiency.

Referring to fig. 1, in order to meet the processing requirements of different additives, when some additives which are not high-temperature resistant are encountered, the temperature of raw materials entering a second-order extruder 2 cannot be too high, otherwise, the performance of the additives is easily affected, therefore, a polymer melt cooler 12 is arranged between the first-order extruder 1 and the second-order extruder 2, the polymer melt cooler 12 can cool the raw materials entering the second-order extruder 2, and the raw materials enter the second-order extruder 2 after being properly cooled, so that the performance of the products can be effectively improved after the additives are added into the raw materials, the quality of the products is ensured, in addition, the polymer melt cooler 12 can be selectively opened or closed as required, when the raw materials are not required to be cooled, the polymerization cooler is closed, and the adaptability of the production process is improved.

Referring to fig. 1, for the output of stable realization product, discharge end at third-order extruder 3 is connected with static mixer 31, static mixer 31's discharge end is connected with mould 32, static mixer 31 not only can be stable realize the output of raw materials, and can mix the product of exporting from third-order extruder 3 once more, further improve the mixed effect of raw materials and auxiliary agent, the raw materials is after static mixer 31 exports, can get into in the mould 32, mould 32 designs according to the product needs, the raw materials is after mould 32 exports, can form final finished product, to different products, change different models mould 32 can, strong adaptability.

Referring to fig. 1, in order to effectively ensure that the functions of each stage can be reliably realized, the length-diameter ratio of the first-order extruder 1 is 16: 1-32: 1, the first-order extruder 1 is a double-screw extruder, the first-order extruder 1 is shorter and has high heating power, and can rapidly realize the melting and plasticizing of the raw materials, the length-diameter ratio of the second-order extruder 2 is 24: 1-64: 1, the second-order extruder 2 is also a double-screw extruder, the rotating speed of the second-order extruder 2 is lower than that of the first-order extruder 1, and the length of the second-order extruder 2 is longer, so that the time for the raw materials to stay in the second-order extruder 2 is longer, the mixing of the raw materials can be realized more fully and uniformly, the length-diameter ratio of the third-order extruder 3 is 16: 1-36: 1, the third-order extruder 3 is a single-screw extruder, and, the output of raw materials is stably realized.

By adopting the technical scheme, the production range is very wide, PS foaming, XPS foaming, EPS foaming, PLA extrusion foaming, PU foaming and the like can be realized, the auxiliary agent can be a foaming agent and also can be other functional auxiliary agents, and the foaming agent can be carbon dioxide, nitrogen, alcohol, freon, alkanes and the like.

The implementation principle of the embodiment is as follows: during operation, raw materials pass through the raw material feeding machine 11 and enter the first-order extruder 1, the raw materials are heated and plasticized in the first-order extruder 1, the molten raw materials pass through the polymer melt cooler 12 and then enter the second-order extruder 2, the auxiliary agents enter the second-order extruder 2 under the conveying of the auxiliary agent feeding machine 21, the auxiliary agents and the raw materials are mixed in the second-order extruder 2, the mixed auxiliary agents enter the third-order extruder 3, the raw materials are cooled and homogenized in the third-order extruder 3, finally pass through the static mixer 31 and enter the die 32, and the mixed auxiliary agents are output from the die 32 to form a finished product.

Example two:

a three-stage extrusion device for series polymer foaming extrusion processing, refer to fig. 2 and 3, and the difference from the first embodiment is that, in the present embodiment, the barrel of the three-stage extruder 3 is composed of an inner barrel 4 and an outer barrel 5, the outer diameter of the inner barrel 4 is equal to the inner diameter of the outer barrel 5, a cooling flow channel 41 includes a spiral groove arranged on the outer surface of the inner barrel 4, a liquid inlet pipe 51 and a liquid outlet pipe 52 are arranged at two ends of the outer barrel 5, the liquid inlet pipe 51 and the liquid outlet pipe 52 are respectively communicated with two ends of the cooling flow channel 41, the cooling flow channel 41 can be formed after the outer barrel 5 is sleeved outside the inner barrel 4, the liquid inlet pipe 51 is connected with a cooling pump, the cooling pump is arranged in a liquid storage tank, a cooling medium is stored in the liquid storage tank, the cooling medium is generally cooling oil, the cooling pump conveys the cooling medium in the liquid storage tank, the heat exchanger cools the cooling liquid output from the cooling flow channel 41, the heat exchanger is connected with the liquid storage tank, and the cooled cooling liquid output from the heat exchanger enters the liquid storage tank for standby again.

Referring to fig. 2 and 3, in order to further improve the cooling effect of the outer cylinder 5, a cooling cover 6 is covered on the outer cylinder 5, the cooling cover 6 is disposed around the outer cylinder 5, an axial flow fan 7 is disposed on the cooling cover 6, an air inlet 71 communicated with an air outlet of the axial flow fan 7 is disposed on the cooling cover 6, air outlet directions of the air inlet 71 and the axial flow fan 7 are both perpendicular to the axial direction of the outer cylinder 5, in order to improve the air cooling effect, the axial flow fans 7 are plural, the axial flow fans 7 are disposed on the cooling cover 6 along the length direction of the cooling cover 6 in an array, and the cooling cover 6 is provided with plural air vents 72 for air to flow out. Open axial fan 7, the wind that axial fan 7 blew out can blow to urceolus 5, cools off urceolus 5 outer wall, and the wind of blowing in the cooling jacket 6 directly discharge through ventilation hole 72 can, axial fan 7 maintains and simple to operate, and power consumption simultaneously ends, can effectual reduction energy consumption, energy saving.

Referring to fig. 2 and 3, a plurality of annular ribs 53 are arranged on the outer circumferential surface of the outer cylinder 5, the annular ribs 53 are arranged in an array manner along the length direction of the cylinder, the contact area between the cylinder and air can be increased by the annular ribs 53, more heat on the cylinder can be taken away when air flows pass through the surface of the cylinder, the cooling effect of the cylinder is further improved, and meanwhile, the integral bending resistance of the cylinder can be increased and the structural strength of the cylinder is improved by the arrangement of the annular ribs 53.

Referring to fig. 2 and 3, in order to facilitate the installation and the disassembly of the axial flow fan 7, the vertical cross section of the cooling cover 6 is in a regular octagon shape, that is, the whole cooling cover 6 is roughly in an octagon shape, the axial flow fans 7 are in two rows, the two rows of axial flow fans 7 are symmetrically arranged on two sides of the cooling cover 6, and the vent holes 72 are arranged on the top surface and the bottom surface of the cooling cover 6, so that the airflow blown by the axial flow fans 7 can be discharged from the top surface and the bottom surface of the cooling cover 6, and the discharge of the hot airflow in the cooling cover 6 can be stably realized, in addition, the two rows of vent holes 72 are arranged on the top surface and the bottom surface of the cooling cover 6, thereby further increasing the exhaust volume.

Referring to fig. 2 and 3, in order to facilitate the installation and the removal of the cooling cover 6, the cooling cover 6 is composed of a left cover body 61 and a right cover body 62 which are symmetrically arranged, the left cover body 61 and the right cover body 62 are symmetrically arranged about the length direction of the cylinder, the left cover body 61 and the right cover body 62 are fixedly connected through a plurality of hasps 63, the hasps 63 are uniformly arranged at the connection position of the left cover body 61 and the right cover body 62 in an array manner along the length direction of the cooling cover 6, when the interior of the cooling cover 6 is required to be cleaned or replaced, the left cover body 61 and the right cover body 62 can be separated only by opening the hasps 63, and thus the cooling cover 6 is removed.

Referring to fig. 3, in order to improve the connection strength between the left cover body 61 and the right cover body 62, positioning grooves 611 (see fig. 7) are arranged at the top and the bottom of the left cover body 61, and a positioning block 621 matched with the positioning grooves 611 is arranged on the right cover body 62, so that the positioning block 621 is embedded into the positioning grooves 611 during splicing, and the positioning and supporting effects on the left cover body 61 and the right cover body 62 can be achieved.

Referring to fig. 3, in order to further improve the cooling effect of the cooling cover 6 on the outer cylinder 5, a plurality of rollers 64 are arranged at two ends of the cooling cover 6 around the circumference of the outer cylinder 5 in an array manner, a rotating shaft of each roller 64 is arranged in parallel with the axis of the outer cylinder 5, each roller 64 is arranged inside the cooling cover 6, and the cooling cover 6 can rotate relative to the outer cylinder 5 by arranging the rollers 64, so that the axial flow fan 7 can carry out all-directional cooling on the outer cylinder 5, and the cooling effect of the axial flow fan 7 is further improved.

Referring to fig. 4 and 5, in order to stably realize the rotation of the cooling cover 6, protruding rings 8 are arranged at two ends of the cooling cover 6 on the outer circumferential surface of the outer cylinder 5, the protruding rings 8 are attached to side surfaces at two ends of the cooling cover 6, the protruding rings 8 can limit the cooling cover 6 in the axial direction of the cooling cover 6 to limit the cooling cover 6 to rotate only around the outer cylinder 5, a driving system for driving the cooling cover 6 to rotate is further arranged on the outer cylinder 5, the driving system can drive the cooling cover 6 to rotate, and the stability of a heat dissipation process is improved.

In addition, referring to fig. 4 and 5, because the cooling cover 6 needs to rotate 360 degrees, in order to stably realize the power supply of the axial flow fan 7, the annular grooves 91 matched with the protruding rings 8 are arranged at the two ends of the cooling cover 6, the conductive ring 81 connected with the power supply is arranged on the side surface of the protruding ring 8, the conductive ring 81 and the protruding rings 8 are coaxially arranged, the conductive sheet 92 in contact with the conductive ring 81 is arranged on the side wall of the annular groove 91, the axial flow fan 7 is electrically connected with the conductive sheet 92, after the left cover body 61 and the right cover body 62 are completely installed, the protruding rings 8 can enter the annular grooves 91, at this time, the conductive sheet 92 can be in contact with the conductive ring 81, thereby stably realizing the power supply of the axial flow fan 7, and the conductive sheet 92 is arranged in the annular grooves 91, the annular grooves 91 can play a role.

Referring to fig. 4 and 5, in order not to affect the installation of the left cover 61 and the right cover 62, the connection rings 9 are provided around the protruding ring 8 on both end surfaces of the cooling cover 6, the thickness of the connection ring 9 is larger than that of the protruding ring 8, the inner diameter of the connection ring 9 is smaller than the outer diameter of the protruding ring 8, and the annular groove 91 is provided on the inner circumferential surface of the connection ring 9, so that when the cooling cover is installed, the left cover 61 and the right cover 62 can be directly and horizontally slid. The driving system comprises gear teeth 82 arranged on the outer peripheral surface of the convex ring 8, the gear teeth 82 are circumferentially arrayed on the convex ring 8, a gear 65 meshed with the gear teeth 82 is rotatably connected to the cooling cover 6, the gear 65 is rotatably arranged at the end part of the cooling cover 6, a notch communicated with the annular groove 91 is formed in the connecting ring 9, the gear 65 is meshed with the gear teeth 82 through the notch, a driving piece for driving the gear 65 to rotate is arranged on the cooling cover 6, in operation, the gear 65 at the two ends of the cooling cover 6 is driven to rotate by the driving piece, the gear 65 is meshed with the gear teeth 82 and the convex ring 8 is fixed, so that the cooling cover 6 can be driven to rotate, the structure is simple, and the operation.

In this embodiment, referring to fig. 2 and fig. 3, the driving member is a motor 66, the number of the motors 66 may be 4, the motors 66 are symmetrically fixed to the end of the cooling cover 6 in pairs, an output shaft of the motor 66 is parallel to the axis of the outer cylinder 5 and is connected to the gear 65, the motor 66 is electrically connected to the conductive sheet 92, and when the motor 66 is turned on, the gear 65 is driven to rotate, so as to drive the cooling cover 6 to rotate integrally.

Referring to fig. 3 and 6, in order to facilitate the fixing of the cooling cover 6 when the cooling cover 6 does not need to be rotated, a positioning pin 93 is slidably connected to the side surface of the connection ring 9 in the axial direction of the outer cylinder 5, a positioning hole 83 for engaging with the positioning pin 93 is provided in the collar 8, and when the cooling cover 6 does not need to be rotated, the driving member is closed, and the positioning pin 93 is inserted into the positioning hole 83, so that the rotation of the cooling cover 6 can be restricted, and the cooling cover 6 is fixed to the outer cylinder 5.

The implementation principle of the embodiment is as follows: when the cooling device works, the cooling pump sends the cooling medium in the liquid storage tank into the cooling flow channel 41, the cooling medium takes away heat on the machine barrel, and the cooling medium flows back into the liquid storage tank after being output from the cooling flow channel 41 and cooled by the heat exchanger; when the cooling pump works, the axial flow fan 7 is started, airflow is output from the vent hole 72 after passing through the outer wall of the outer barrel 5, and the axial flow fan 7 dissipates heat from the outer wall of the outer barrel 5; when the cooling cover 6 is to be removed, the left cover 61 and the right cover 62 are slid in the horizontal direction by opening the buckle 63.

Example three:

a series connection type three-order extrusion device for polymer foaming extrusion processing, refer to FIG. 7, and is different from the first embodiment in that in the present embodiment, a driving member does not adopt a motor 66, a wind wheel 10 is rotatably connected in a cooling cover 6 along the length direction of the cooling cover 6, the wind wheel 10 is eccentrically arranged relative to an axial flow fan, gears 65 are respectively connected after two ends of the wind wheel 10 extend out of the cooling cover 6, after the axial flow fan 7 rotates, the axial flow fan 7 blows the wind wheel 10, the gears 65 at two ends of the cooling cover 6 can be driven to rotate by the rotation of the wind wheel 10, so as to realize the rotation of the cooling cover 6, the gears 65 are respectively arranged at two ends of the wind wheel,

in addition, in order to stably realize the driving of the cooling cover 6, the number of the wind wheels 10 is two, the two wind wheels 10 are centrosymmetric about the outer cylinder 5, and the two ends of the two wind wheels 10 are respectively provided with the gear 65, so that the axial fans 7 positioned at the two sides of the cooling cover 6 can play a role in the rotation of the cooling cover 6, and the driving of the cooling cover 6 can be more stably realized.

In this embodiment, the wind wheel 10 includes a wheel axle 101 and wheel blades 102 circumferentially arranged on the surface of the wheel axle 101, two ends of the wheel axle 101 are rotatably connected with two ends of the cooling cover 6 and extend out of the cooling cover 6, and the wheel axle 101 is staggered with respect to the axial flow fan 7, so that when the axial flow fan 7 is turned on, the axial flow fan 7 can blow the wind wheel 10 to rotate.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.