CN211363414U - Screw for CPVC pipe extruder - Google Patents
Screw for CPVC pipe extruder Download PDFInfo
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- CN211363414U CN211363414U CN201922255501.5U CN201922255501U CN211363414U CN 211363414 U CN211363414 U CN 211363414U CN 201922255501 U CN201922255501 U CN 201922255501U CN 211363414 U CN211363414 U CN 211363414U
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Abstract
The utility model belongs to the new material injection molding production field, in particular to a screw rod for a CPVC pipe extruder and an extruder using the screw rod, which comprises a screw rod body (100), a screw rod core (101), a screw ridge (102), a screw rod head (200), a spring ring (201), a screw groove (202), a storage cavity (203), an injection nozzle (204) and a connecting rod part (300); the utility model discloses a screw rod design benefit is extruding the in-process and can carry out abundant stirring to the CPVC material and mix, extrudes the convenience and is difficult for blockking up, improves the production efficiency of CPVC tubular product.
Description
Technical Field
The utility model belongs to the new material production field of moulding plastics specifically discloses a screw rod and an extruder of using this screw rod for CPVC tubular product extruder.
Background
The chlorinated polyvinyl chloride resin (CPVC) is prepared by chlorination modification of polyvinyl chloride resin (PVC), and the chlorine content is generally 61-73%. Therefore, the flame retardant has greatly improved physical and mechanical properties, heat resistance, weather resistance, corrosion resistance, flame retardance, self-extinguishing property and the like compared with PVC, and is a material with excellent performance. The method is widely applied to manufacturing various pipes, plates, sections, sheets, injection molding parts, foam materials, anticorrosive coatings and the like, and has a wide market prospect.
However, in the actual production of CPVC pipes, with the increase of chlorine content, although the tensile strength and bending strength of the product are increased, the brittleness is also increased, and in addition, the higher chlorine content in CPVC leads to higher plasticizing temperature and plasticizing time, which further causes poorer processability, and the processing difficulty is much higher than that of general PVC, and higher requirements are also provided for the screw of the extruder.
SUMMERY OF THE UTILITY MODEL
Not enough more than, the utility model discloses a screw rod and an extruder of using this screw rod for CPVC tubular product extruder.
The technical scheme of the utility model as follows:
a screw for a CPVC pipe extruder comprises a screw body, a screw core, a screw ridge, a screw head, a spring ring, a screw groove, a material storage cavity, an injection nozzle and a connecting rod part; the screw rod body is hollow, and the hollow piston is connected with the screw rod core; the screw ridge is spirally arranged around the screw rod body; one end of the screw rod body is a hollow conical screw head, and a space formed between the hollow part of the screw head and the screw core is the material storage cavity; a screw groove is formed at the junction of the screw head and the screw body, and the screw groove is a hole groove which is formed around the screw body and penetrates through the screw body to enter the material storage cavity; the spring ring is made of a strong spring, and when the spring ring is not compressed, the length of the spring ring completely covers the length of the spiral groove; the spring ring may have a length shorter than a length of the screw groove when compressed; the injection nozzle is positioned at the tail end of the conical part of the screw head; the connecting rod is positioned at the other end of the screw rod body, and the connecting rod part is connected with the motor. The CPVC enters the spiral shell barrel from a feed inlet of the extruder, the motor drives the screw rod body to rotate through the connecting rod part, and the CPVC raw material is subjected to liquid blooming through stirring and extrusion among the screw rod body, the spiral edge and the wall of the spiral shell barrel; and push the CPVC raw materials to the screw head, when being full of CPVC raw materials in the spiral shell bucket, because pressure differential, CPVC raw materials will push away the spring ring, get into the storage cavity through the thread groove, the hydraulic pressure push-and-pull device in screw core rear end promotes the screw core afterwards, jet out the shaping through the injection nozzle with the CPVC raw materials in the storage cavity.
Further, the screw rib and the screw body are integrally formed, and the height of the surface of the screw body protruding out is 0.2-1 times of the diameter of the screw body.
Further, the caliber of the injection nozzle is 0.1-0.3 times of the diameter of the screw body.
Further, the rear end of the screw core is connected with a hydraulic push-pull device.
Further, above-mentioned a screw rod for CPVC tubular product extruder, the screw rod body is the high temperature alloy steel material.
Further, the injection nozzle is made of martensite precipitation hardening stainless steel.
Further, the length of the screw groove zone accounts for 1/10-1/5 of the length of the screw body.
Further, the CPVC pipe extruder comprises the screw, a base, a support, an extrusion cylinder, a motor, a feed hopper, an exhaust device, a hydraulic push-pull device, a heating sleeve and an oscillator; the output end of the motor is connected with the connecting rod part of the screw rod; the hydraulic push-pull device in the motor is connected with a screw rod core of the screw rod, and when the screw rod rotates, the screw rod core keeps static; the screw rod is sleeved in the extrusion cylinder; the heating sleeve is wrapped on the extrusion cylinder; the feed hopper is positioned at one end of the extrusion cylinder, and the lower part of the feed hopper is communicated with the interior of the extrusion cylinder; the oscillator is fixedly connected with the lower part of the feed hopper; the exhaust device is arranged at the upper end of the extrusion cylinder and communicated with the interior of the extrusion cylinder.
According to the above technical scheme, the utility model discloses following beneficial effect has:
1) the utility model discloses a screw rod for CPVC tubular product extruder, the screw rod body uses high temperature alloy steel and spiral arris integrated into one piece, intensity is high, high temperature resistant corrosion-resistant, has very strong tolerance to the CPVC material of high chlorine content, is favorable to the stirring shaping of CPVC material;
2) the utility model discloses a screw rod for CPVC pipe extruder abandons the solid setting of traditional screw rod, sets up the screw core that can push and pull among them, cooperates the injection nozzle on the screw head, realizes the high-speed extrusion of CPVC material, is difficult for blockking up the injection nozzle, is easy to the shaping of later stage tubular product;
3) the utility model discloses a screw rod for CPVC tubular product extruder, the CPVC tubular product of production and processing has good mechanical properties, and tensile strength reaches 67 Mpa, compares traditional PVC tubular product, and chlorine content is improved to 67% by 55.7%, and the vicat softening temperature is by 75 ℃, improves to 115 ℃, and the highest service temperature can reach 110 ℃.
Drawings
FIG. 1 shows the working state of the screw rod in the CPVC material of the present invention without pushing the spring ring open to enter the material storage chamber;
FIG. 2 is a working state of the screw rod in the CPVC material pushing the spring ring away into the material storage chamber;
fig. 3 is a working state of the CPVC material pushed by the screw core of the screw according to the present invention to be injected from the injection nozzle;
fig. 4 is an extruder using the screw according to the present invention.
Wherein: 1 base, 2 supports, 3 extrusion cylinders, 4 motors, 5 feed hoppers, 6 exhaust devices, 31 screws, 32 heating sleeves, 41 hydraulic push-pull devices, 51 oscillators, 100 screw bodies, 101 screw cores, 102 screw ridges, 200 screw heads, 201 spring rings, 202 screw grooves, 203 storage cavities, 204 injection nozzles and 300 connecting rod parts.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
A screw for a CPVC pipe extruder as shown in fig. 1-3, which is characterized by comprising a screw body 100, a screw core 101, a screw rib 102, a screw head 200, a spring ring 201, a screw groove 202, a storage chamber 203, an injection nozzle 204, and a connecting rod portion 300; the screw rod body 100 is hollow, and a piston of the hollow part is connected with a screw rod core 101; the screw rib 102 is spirally arranged around the screw body 100; one end of the screw body 100 is a hollow conical screw head 200, and a space formed between the hollow part of the screw head 200 and the screw core 101 is the material storage cavity 203; a screw groove 202 is formed at the junction of the screw head 200 and the screw body 100, and the screw groove 202 is a hole groove which is formed around the screw body 100 and penetrates through the screw body 100 and enters the material storage cavity 203; the spring ring 201 is made of a strong spring, and when the spring ring is not compressed any more, the length of the spring ring 201 completely covers the length of the screw groove 202; when compressed, the length of the spring ring 201 may be shorter than the length of the thread groove 202; the injection nozzle 204 is positioned at the end of the conical part of the screw head 200; the connecting rod 300 is located at the other end of the screw body 100, and the connecting rod part 300 is connected with a motor; specifically, the screw rib 102 and the screw body 100 are integrally formed, and the height of the screw rib protruding out of the surface of the screw body 100 is 0.2 times of the diameter of the screw body 100; preferably, the caliber of the injection nozzle 204 is 0.1 times of the diameter of the screw body 100; particularly, the rear end of the screw rod core 101 is connected with a hydraulic push-pull device; the screw body 100 is made of high-temperature alloy steel; the injection nozzle 204 is made of martensite precipitation hardening stainless steel; the length of the groove 202 area is 1/10 of the length of the screw body 100.
When in work: the CPVC enters a spiral shell barrel (not shown in the figure) from a feed inlet of an extruder, a motor drives the spiral shell rod body 100 to rotate through a connecting rod part 300, and the CPVC raw material is subjected to liquid sublimation through stirring and extrusion among the spiral shell rod body 100, the spiral rib 102 and the wall of the spiral shell barrel; and the CPVC raw material is pushed to the screw head 200, when the screw barrel is filled with the CPVC raw material, due to the pressure difference, the CPVC raw material pushes away the spring ring 201, enters the storage cavity 203 through the screw groove 202, and then the screw core 101 is pushed by a hydraulic push-pull device (not shown in the figure) at the rear end of the screw core 101, so that the CPVC raw material in the storage cavity 203 is injected and molded through the injection nozzle 204.
Example 2
A screw for a CPVC pipe extruder as shown in fig. 1-3, which is characterized by comprising a screw body 100, a screw core 101, a screw rib 102, a screw head 200, a spring ring 201, a screw groove 202, a storage chamber 203, an injection nozzle 204, and a connecting rod portion 300; the screw rod body 100 is hollow, and a piston of the hollow part is connected with a screw rod core 101; the screw rib 102 is spirally arranged around the screw body 100; one end of the screw body 100 is a hollow conical screw head 200, and a space formed between the hollow part of the screw head 200 and the screw core 101 is the material storage cavity 203; a screw groove 202 is formed at the junction of the screw head 200 and the screw body 100, and the screw groove 202 is a hole groove which is formed around the screw body 100 and penetrates through the screw body 100 and enters the material storage cavity 203; the spring ring 201 is made of a strong spring, and when the spring ring is not compressed any more, the length of the spring ring 201 completely covers the length of the screw groove 202; when compressed, the length of the spring ring 201 may be shorter than the length of the thread groove 202; the injection nozzle 204 is positioned at the end of the conical part of the screw head 200; the connecting rod 300 is located at the other end of the screw body 100, and the connecting rod part 300 is connected with a motor; specifically, the screw rib 102 and the screw body 100 are integrally formed, and the height of the screw rib protruding out of the surface of the screw body 100 is 0.5 times of the diameter of the screw body 100; preferably, the caliber of the injection nozzle 204 is 0.3 times of the diameter of the screw body 100; particularly, the rear end of the screw rod core 101 is connected with a hydraulic push-pull device; the screw body 100 is made of high-temperature alloy steel; the injection nozzle 204 is made of martensite precipitation hardening stainless steel; the length of the groove 202 area is 1/5 of the length of the screw body 100.
When in work: the CPVC enters a spiral shell barrel (not shown in the figure) from a feed inlet of an extruder, a motor drives the spiral shell rod body 100 to rotate through a connecting rod part 300, and the CPVC raw material is subjected to liquid sublimation through stirring and extrusion among the spiral shell rod body 100, the spiral rib 102 and the wall of the spiral shell barrel; and the CPVC raw material is pushed to the screw head 200, when the screw barrel is filled with the CPVC raw material, due to the pressure difference, the CPVC raw material pushes away the spring ring 201, enters the storage cavity 203 through the screw groove 202, and then the screw core 101 is pushed by a hydraulic push-pull device (not shown in the figure) at the rear end of the screw core 101, so that the CPVC raw material in the storage cavity 203 is injected and molded through the injection nozzle 204.
Example 3
A CPVC pipe extruder as shown in fig. 4, which comprises a screw, reference numeral 31, a base 1, a support 2, an extrusion cylinder 3, a motor 4, a feed hopper 5, a vent device 6, a hydraulic push-pull device 41, a heating sleeve 32, and an oscillator 51; the output end of the motor 4 is connected with the connecting rod part 300 of the screw rod 31; the hydraulic push-pull device 41 inside the motor 4 is connected with the screw rod core 101 of the screw rod 31, and when the screw rod 31 rotates, the screw rod core 101 is kept static; the screw rod 31 is sleeved inside the extruding cylinder 3; the heating sleeve 32 is wrapped on the extrusion cylinder 3; the feed hopper 5 is positioned at one end of the extrusion cylinder 3, and the lower part of the feed hopper is communicated with the interior of the extrusion cylinder 3; the oscillator 51 is fixedly connected with the lower part of the feed hopper 5; the exhaust device 6 is arranged at the upper end of the extrusion cylinder 3, and the exhaust device 6 is communicated with the interior of the extrusion cylinder 3.
Example 4
Test example
Tests on the CPVC profile obtained in example 2 show that the prepared CPVC profile has good mechanical properties and the tensile strength of 67 Mpa, and compared with the traditional PVC material, the CPVC profile has the advantages that the chlorine content is increased from 55.7 percent to 67 percent, the Vicat softening temperature is increased from 75 ℃ to 115 ℃, and the maximum service temperature can reach 110 ℃.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention can not be limited thereby, and the simple equivalent changes and modifications made according to the claims and the utility model also belong to the protection scope of the present invention.
Claims (8)
1. A screw for a CPVC pipe extruder is characterized by comprising a screw body (100), a screw core (101), a screw rib (102), a screw head (200), a spring ring (201), a screw groove (202), a material storage cavity (203), an injection nozzle (204) and a connecting rod part (300); the screw rod body (100) is hollow, and a piston of the hollow part is connected with a screw rod core (101); the screw rib (102) is spirally arranged around the screw body (100); one end of the screw rod body (100) is a hollow conical screw head (200), and a space formed between the hollow part of the screw head (200) and the screw core (101) is the material storage cavity (203); a screw groove (202) is formed in the junction of the screw head (200) and the screw body (100), and the screw groove (202) is a hole groove which is formed around the screw body (100) and penetrates through the screw body (100) to enter the material storage cavity (203); the spring ring (201) is made of a strong spring, and when the spring ring is not compressed any more, the length of the spring ring (201) completely covers the length of the screw groove (202); the length of the spring ring (201) may be shorter than the length of the thread groove (202) when compressed; the injection nozzle (204) is positioned at the tail end of the conical part of the screw head (200); the connecting rod part (300) is positioned at the other end of the screw rod body (100), and the connecting rod part (300) is connected with a motor.
2. A screw for a CPVC pipe extruder as claimed in claim 1, wherein said rib (102) is formed integrally with said screw body (100) and protrudes from the surface of said screw body (100) by a height of 0.2-1 times the diameter of said screw body (100).
3. A screw for a CPVC pipe extruder as claimed in claim 1, wherein said nozzle (204) has a bore diameter of 0.1-0.3 times the diameter of said screw body (100).
4. A screw for a CPVC pipe extruder as claimed in claim 1, wherein the rear end of said screw core (101) is connected with a hydraulic push-pull device.
5. A screw for a CPVC pipe extruder as claimed in claim 1, wherein said screw body (100) is made of high temperature alloy steel.
6. A screw for a CPVC pipe extruder as claimed in claim 1, wherein said nozzle (204) is made of martensitic precipitation hardening stainless steel.
7. A screw for a CPVC pipe extruder as claimed in claim 1, wherein said groove (202) zone length is 1/10-1/5 of the length of said screw body (100).
8. CPVC pipe extruder, characterized by comprising a screw (31) according to any of claims 1-7, and a base (1), a support (2), an extrusion cylinder (3), a motor (4), a feed hopper (5), a venting device (6), a hydraulic push-pull device (41), a heating sleeve (32), an oscillator (51); the output end of the motor (4) is connected with the connecting rod part (300) of the screw rod (31); a hydraulic push-pull device (41) in the motor (4) is connected with a screw rod core (101) of the screw rod (31), and when the screw rod (31) rotates, the screw rod core (101) keeps static; the screw rod (31) is sleeved in the extrusion cylinder (3); the heating sleeve (32) is wrapped over the extrusion cylinder (3); the feed hopper (5) is positioned at one end of the extrusion cylinder (3), and the lower part of the feed hopper is communicated with the interior of the extrusion cylinder (3); the oscillator (51) is fixedly connected with the lower part of the feed hopper (5); the air exhaust device (6) is arranged at the upper end of the extrusion cylinder (3), and the air exhaust device (6) is communicated with the interior of the extrusion cylinder (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922255501.5U CN211363414U (en) | 2019-12-16 | 2019-12-16 | Screw for CPVC pipe extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922255501.5U CN211363414U (en) | 2019-12-16 | 2019-12-16 | Screw for CPVC pipe extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211363414U true CN211363414U (en) | 2020-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922255501.5U Active CN211363414U (en) | 2019-12-16 | 2019-12-16 | Screw for CPVC pipe extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211363414U (en) |
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2019
- 2019-12-16 CN CN201922255501.5U patent/CN211363414U/en active Active
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