CN218171322U

CN218171322U - Screw core cooling segmentation structure that adjusts temperature

Info

Publication number: CN218171322U
Application number: CN202222080751.1U
Authority: CN
Inventors: 曹恩; 董康伦; 乐建军
Original assignee: Zhejiang Jinhu Plastic Machine Co ltd
Current assignee: Zhejiang Jinhu Plastic Machine Co ltd
Priority date: 2022-08-08
Filing date: 2022-08-08
Publication date: 2022-12-30
Anticipated expiration: 2032-08-08

Abstract

The utility model provides a screw rod core cooling segmentation structure that adjusts temperature, which comprises a screw rod, outer cooling tube and interior cooling tube, wherein outer cooling tube connects screw rod stalk portion and rotary joint, rotate together with the screw rod, the tail end of interior cooling tube is stretched out the screw rod and is connected with rotary joint is inside, the inside depths of screw rod are stretched to the front end of interior cooling tube, interior cooling tube does not rotate, set up the cooling hole that the confession interior cooling tube that runs through the stalk portion wears to put along length direction in the screw rod, wherein the aperture of the cooling hole of feeding section department is greater than the aperture of the cooling hole between feeding section to the play material section, interior cooling tube is equipped with at screw rod feeding section position and supplies partial coolant to flow and is used for carrying out refrigerated side opening to the feeding section of screw rod. The utility model has the advantages of simple and reasonable structure, the cooling of feeding section is emphasized more, can realize the raw materials of a screw rod processing different requirements, has saved the time of changing the screw rod to make the screw rod accuse temperature more accurate, practice thrift manpower and material resources, reduced the cost of goods.

Description

Screw core cooling segmentation structure that adjusts temperature

Technical Field

The utility model belongs to the technical field of macromolecular material processing machinery, a screw rod cooling structure of extruder is related to, concretely relates to screw rod core cooling segmentation structure that adjusts temperature.

Background

The extruder is used for fully mixing and extruding various particle raw materials and outputting the raw materials, and is mainly used in the field of plastic or rubber manufacturing. When the extruder is in operation, the raw materials are heated to be viscous flow, and under the condition of pressurization, the raw materials are made to pass through a neck mould with a certain shape to form a continuous body with a cross section similar to the shape of the neck mould, then the continuous body is cooled to enable the raw materials with a certain geometric shape and size to be changed from a viscous flow state to a high elastic state, and finally the raw materials are cooled and shaped to be glass state, so that the required product is obtained.

When the extruder works, the raw materials are heated to be viscous flow, which is mainly realized by heating outside a cylinder and friction and shearing heating of the raw materials. The heat conducting medium communicated with the screw core is generally heat conducting oil and water, and mainly plays a cooling role. The cooling mode of the screw core is that the screw core is perforated, a cooling outer pipe is arranged on the handle and extends out of the reduction box, and a bidirectional rotary joint is connected to the cooling outer pipe. A cooling inner pipe is fixed on the inner pipe of the rotary joint. The cooling water enters from the cooling inner pipe and is discharged from the screw core hole through the cooling outer pipe.

Screw core cooling is generally divided into two categories: one is feed port cooling, as shown in fig. 5, the screw comprises a feed section a, a compression section B and a discharge section C, in order to improve the feed efficiency (the screw temperature can increase the conveying efficiency of the granular material), the raw material is prevented from melting at the feed port D, so that no feed is performed, at this time, the inside of the screw 1 is perforated to a shorter length, the general perforation depth is about 1/3-1/2 of the length of the feed section a of the screw, and correspondingly, the internal cooling pipe 20 is also shorter; the other is whole cooling, as shown in fig. 4, the screw comprises a feeding section a, a compression section B and a discharging section C, and for low-temperature or temperature-sensitive raw materials, holes are drilled in the whole screw 1 to the screw head, the inner cooling pipe 20 is also long, and a cooling medium cools the whole screw 1.

The whole inside processing cooling hole of screw rod produces some problems, and coolant passes through the cooling inner tube and flows out from the screw rod head, flows out the screw rod from the screw rod stalk portion again, and in-process coolant absorbs the screw rod heat, probably causes the screw rod to go out the material section temperature and is less than the feeding section temperature. Under the general condition, the extruder set temperature is that ejection of compact section temperature is greater than the feeding section temperature, and this is for there is sufficient propelling movement efficiency in feeding section low temperature, and ejection of compact section high temperature guarantees material plastify effect, and at this moment the screw core cooling effect just is not good.

Therefore, a screw core cooling and segmented temperature adjusting structure needs to be designed, so that a device can process some low-temperature or temperature-sensitive raw materials without replacing a screw, and can process some raw materials which only need to reduce a feeding section without controlling the temperature of the whole screw.

Disclosure of Invention

The utility model aims to solve the technical problem that to foretell technical current situation and provide a screw rod core cooling segmentation structure that adjusts the temperature of structural design is reasonable, can realize the segmentation accuse temperature, can realize the raw materials of a screw rod processing different requirements, reduce cost.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a screw rod core cooling segmentation structure that adjusts temperature, includes screw rod, outer cooling tube and interior cooling tube, and wherein outer cooling tube connects screw rod stalk portion and rotary joint, rotates with the screw rod is together, and the tail end of interior cooling tube stretches out the screw rod and is connected with rotary joint is inside, and the inside depths of screw rod are stretched to the front end of interior cooling tube, and interior cooling tube does not rotate, and coolant gets into the screw rod core through interior cooling tube, and from outer cooling tube discharge, its characterized in that: set up the cooling hole that the confession internal cooling pipe that runs through the stalk portion worn to put along length direction in the screw rod, wherein the aperture of the cooling hole of feed section department is greater than the aperture of the cooling hole between feed section to the play material section, and internal cooling pipe is equipped with the side opening that can supply partial coolant to flow out and be used for carrying out the cooling to the feed section of screw rod in screw rod feed section position.

As an improvement, the total length of an inner cooling hole in the screw is 5-10cm less than the total length of the screw, a gap for flowing a cooling medium is formed between an inner cooling pipe and the inner cooling hole, and the diameter of a side hole formed in the feeding section of the screw by the inner cooling pipe is 1/3-1/2 of the caliber of the inner cooling pipe.

Furthermore, a gap for cooling medium to flow is formed between the front end of the inner cooling pipe and the inner end of the cooling inner hole, and a spray head which can be used for cooling medium to flow out and is used for cooling the discharge section and the compression section of the screw rod in a segmented mode is installed at the front end of the inner cooling pipe.

Still further, the shower nozzle passes through threaded connection's mode detachably and installs at the front end of interior cooling tube, can change the shower nozzle of different bores according to cooling medium's flow needs, if screw rod ejection of compact section and compression section when not cooling, the shower nozzle can be changed into the end cap.

Furthermore, the aperture of the cooling inner hole of the feeding section is 25 +/-1% of the diameter of the screw, and the aperture of the cooling inner hole of the rest part is 20 +/-1% of the diameter of the screw.

And finally, the handle part of the screw is arranged in the reduction gearbox, the tail end of the inner cooling pipe penetrates through the reduction gearbox to be connected with the inner pipe of the rotary joint, the outer cooling pipe is sleeved outside the inner cooling pipe, one end of the outer cooling pipe is inserted into the cooling inner hole of the handle part of the screw to be fixed with the screw, the other end of the outer cooling pipe is connected with the rotary joint, the rotary joint is a bidirectional rotary joint and is connected with the outer joint, one end of the outer joint is provided with a cooling medium inlet coaxial with the inner cooling pipe, and the side part of the outer joint is provided with a cooling medium outlet.

Compared with the prior art, the utility model has the advantages of: the cooling inner hole of the core part of the screw is reasonably designed, the cooling inner hole at the feeding section of the screw is large, the cooling inner hole between the feeding section and the discharging section is small, and the feeding section of the screw can be cooled by paying more attention; the internal cooling pipe is provided with a side hole at the position of the screw feeding section for cooling the feeding section of the screw, and the head of the internal cooling pipe is provided with a replaceable spray head for cooling the discharging section and the compression section of the screw, so that the flow of cooling media at different positions of the screw can be adjusted, and the segmented temperature control is realized. The utility model discloses the structure is established simply rationally, can realize the raw materials of a screw rod processing different requirements, has saved the time of changing the screw rod to make the screw rod accuse temperature more accurate, practice thrift manpower and material resources, reduced the cost of goods.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the area M in FIG. 1;

FIG. 3 is an enlarged view of a portion of the area N in FIG. 1;

FIG. 4 is a schematic structural view of a conventional screw employing a feed port cooling structure;

fig. 5 is a schematic structural view of a conventional screw employing a whole cooling structure.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 3, a screw core cooling segmented temperature adjusting structure comprises a screw 1, an outer cooling tube 3 and an inner cooling tube 2, wherein the screw 1 comprises a feeding section a, a compression section B and a discharge section C, the outer cooling tube 3 is connected with a handle of the screw 1 and a rotary joint 4 and rotates together with the screw 1, the tail end of the inner cooling tube 2 extends out of the screw 1 and is connected with the inside of the rotary joint 4, the front end of the inner cooling tube 2 extends to the deep inside of the screw 1, the inner cooling tube 2 does not rotate, a cooling inner hole 11 penetrating through the handle and used for the penetration of the inner cooling tube is formed in the screw 1 along the length direction, the aperture of the cooling inner hole 11 at the feeding section a is larger than that of the cooling inner hole 11 between the feeding section a and the discharge section C, a cooling medium enters the core of the screw 1 through the inner cooling tube 2 and is discharged from the outer cooling tube 3, and the inner cooling tube 2 is provided with a side hole 21 at the position of the feeding section a of the screw 1 through which part of the cooling medium can flow out to cool the feeding section a of the screw 1.

The concrete structure is as follows: the total length of the cooling inner holes 11 in the screw 1 is 5-10cm less than the total length of the screw 1, the aperture of the cooling inner holes 11 in the feeding section A is 25 +/-1% of the diameter of the screw 1, and the aperture of the cooling inner holes in the rest part is about 20 +/-1% of the diameter of the screw 1. A gap for flowing of a cooling medium (water or heat conducting oil) is formed between the inner cooling pipe 2 and the cooling inner hole 11, and the diameter of a side hole 21 formed in the position A of the feeding section of the screw 1 of the inner cooling pipe 2 is 1/3-1/2 of the diameter of the inner cooling pipe 2. A gap for flowing of cooling medium is formed between the front end of the inner cooling pipe 2 and the inner end of the cooling inner hole 11, and a spray head 7 which can be used for flowing out of the cooling medium and used for cooling the discharge section C and the compression section B of the screw rod 1 in a segmented mode is installed at the front end of the inner cooling pipe 2.

The spray head 7 is detachably arranged at the front end of the inner cooling pipe 2 in a threaded connection mode, the spray head 7 with different calibers can be replaced according to the flow of cooling medium, segmented temperature control is realized, and the spray head 7 can be replaced into a plug if the discharge section C and the compression section B of the screw rod 1 are not cooled.

The stalk portion of screw rod 1 is installed in reducing gear box 6, the tail end of internal cooling pipe 2 passes reducing gear box 6 and is connected with 4 inner tubes of rotary joint, outer cooling tube 3 wears to put in reducing gear box 6, the cover is established outside internal cooling pipe 2, the one end of outer cooling tube 3 is planted and is fixed with screw rod 1 in the cooling hole 11 of 1 stalk portion of screw rod, the other end of outer cooling tube 3 links to each other with rotary joint 4, rotary joint 4 is two-way rotary joint, rotary joint 4 links to each other with outer joint 5, the one end of outer joint 5 is equipped with the coolant inlet coaxial with internal cooling pipe 2, the coolant export has been seted up to the lateral part of outer joint 5.

During cooling, a cooling medium enters from the outer joint 5 and enters the core part of the screw rod 1 through the inner cooling pipe 2, part of the cooling medium flows out from the side hole 21 of the inner cooling pipe 2 at the feeding section A to cool the feeding section A of the screw rod 1, the rest of the cooling medium flows out from the front end nozzle 7 of the inner cooling pipe 2 to cool the discharging section C and the compression section B of the screw rod 1, and finally the cooling medium is discharged from the outer cooling pipe 2.

Because the cooling inner hole 11 of the screw rod 1 is designed to be large in diameter at the feeding section A and small in other diameters, the cooling of the feeding section A is increased, the spray heads 7 with different calibers can be replaced according to the flow of cooling media, the flow of the cooling media at different positions of the screw rod can be adjusted, and segmented temperature control is realized.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a screw rod core cooling segmentation structure that adjusts temperature, includes screw rod, outer cooling tube and interior cooling tube, and wherein outer cooling tube connects screw rod stalk portion and rotary joint, rotates with the screw rod is together, and the tail end of interior cooling tube stretches out the screw rod and is connected with rotary joint is inside, and the inside depths of screw rod are stretched to the front end of interior cooling tube, and interior cooling tube does not rotate, and coolant gets into the screw rod core through interior cooling tube, and from outer cooling tube discharge, its characterized in that: set up the cooling hole that the confession internal cooling pipe that runs through the stalk portion worn to put along length direction in the screw rod, wherein the aperture of the cooling hole of feed section department is greater than the aperture of the cooling hole between feed section to the play material section, and internal cooling pipe is equipped with the side opening that can supply partial coolant to flow out and be used for carrying out the cooling to the feed section of screw rod in screw rod feed section position.

2. The screw core cooling segmented temperature conditioning structure of claim 1, wherein: the total length of the cooling inner hole in the screw is 5-10cm less than the total length of the screw, a gap for cooling medium to flow is formed between the cooling inner hole and the cooling pipe, and the diameter of a side hole formed in the feeding section of the screw by the cooling pipe is 1/3-1/2 of the caliber of the cooling pipe.

3. The screw core cooling segmented temperature conditioning structure of claim 2, wherein: a gap for flowing of cooling media is formed between the front end of the inner cooling pipe and the inner end of the cooling inner hole, and a spray head which can be used for flowing out of the cooling media and cooling the discharge section and the compression section of the screw rod in a segmented mode is installed at the front end of the inner cooling pipe.

4. The screw core cooling segmented temperature conditioning structure of claim 3, wherein: the shower nozzle passes through threaded connection's mode detachably and installs at the front end of interior cooling tube, can change the shower nozzle of different bores according to coolant's flow needs, if screw rod ejection of compact section and compression section when not cooling, the shower nozzle can be changed into the end cap.

5. The screw core cooling segmented temperature adjusting structure according to any one of claims 1 to 4, wherein: the aperture of the cooling inner hole of the feeding section is 25 +/-1% of the diameter of the screw, and the aperture of the cooling inner hole of the rest part is 20 +/-1% of the diameter of the screw.

6. The screw core cooling segmented temperature adjusting structure according to any one of claims 1 to 4, wherein: the handle part of the screw is installed in the reduction gearbox, the tail end of the inner cooling pipe penetrates through the reduction gearbox to be connected with the inner pipe of the rotary joint, the outer cooling pipe is sleeved outside the inner cooling pipe, one end of the outer cooling pipe is inserted into a cooling inner hole of the handle part of the screw and fixed with the screw, the other end of the outer cooling pipe is connected with the rotary joint, the rotary joint is a bidirectional rotary joint and connected with an outer joint, one end of the outer joint is provided with a cooling medium inlet coaxial with the inner cooling pipe, and a cooling medium outlet is formed in the side part of the outer joint.