CN113414896B - Closed air-cooled brace pelletizing system - Google Patents

Closed air-cooled brace pelletizing system Download PDF

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Publication number
CN113414896B
CN113414896B CN202110668479.6A CN202110668479A CN113414896B CN 113414896 B CN113414896 B CN 113414896B CN 202110668479 A CN202110668479 A CN 202110668479A CN 113414896 B CN113414896 B CN 113414896B
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China
Prior art keywords
temperature
low
closed air
sealed
liquid
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CN202110668479.6A
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CN113414896A (en
Inventor
蒋冠森
李凌晨
吴侃
李若云
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Hangzhou Rejoin Mastin Medical Device Co ltd
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Hangzhou Rejoin Mastin Medical Device Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04—Particle-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Formation And Processing Of Food Products (AREA)

Abstract

The invention discloses a closed air-cooled brace grain cutting system which comprises a sealed bin, wherein low-temperature high-purity nitrogen flows through the sealed bin; the mouth mold is communicated with the sealed bin; the low-temperature jacket is communicated with the mouth mold, and low-temperature liquid flows through the low-temperature jacket; the feed inlet of the granulator is arranged in the sealed bin; the device further comprises a conveying device arranged in the sealed bin, and the conveying device is used for conveying materials passing through the mouth mold into the granulator. Aiming at the technical problem that the activity of the existing high-activity particles is easily lost in the process of cutting the particles, the invention provides a closed air-cooled bracing and cutting system which can pre-cool a high-temperature melt under the condition of not contacting with materials, completely isolates air in the process of bracing and cutting the particles and prevents the active materials from being inactivated.

Description

Closed air-cooled brace grain cutting system
Technical Field
The invention relates to the technical field of plastic processing, in particular to a closed air-cooled brace grain cutting system.
Background
At present, the air-cooled strand cutting and pelletizing system sold on the market adopts air at room temperature for cooling, the cooling time is long, the length of a conveying belt needs 10-20 meters, and the air in the plum rain season still contains a large amount of water vapor, and the material containing high-activity particles for some medical use is subjected to pelletizing in the environment, so that the material is inactivated and cannot be used.
Such as a cold pellet cutting system of CN108748772A, which uses liquid nitrogen to directly contact the material, suddenly cool it, and cut it into pellets. The method can cause the material to shrink violently, cracks appear on the surface of the material, the appearance of the material is unqualified, high-activity particles contained in the material can lose activity, and for the material used in medical treatment, liquid nitrogen directly contacts the material to cause the pollution of the material.
Disclosure of Invention
1. Technical problem to be solved by the invention
Aiming at the technical problem that the activity of the existing high-activity particles is easy to lose in the process of granulating, the invention provides a closed air-cooled strand granulating system which can pre-cool a high-temperature melt under the condition of not contacting with materials, completely isolates air in the process of strand granulating and prevents the inactivation of active materials.
2. Technical scheme
In order to solve the problems, the technical scheme provided by the invention is as follows:
a closed air-cooled brace grain cutting system comprises a sealed bin, wherein low-temperature high-purity nitrogen flows through the sealed bin; the mouth mold is communicated with the sealing bin; the low-temperature jacket is communicated with the mouth mold, and low-temperature liquid flows through the low-temperature jacket; the feed inlet of the granulator is arranged in the sealed bin; still including locating the conveyor in the sealed storehouse, conveyor is used for carrying the material through the bush to the pelleter in.
Optionally, the conveyor is a steel mesh conveyor belt.
Optionally, the steel mesh conveyor belt has a length of 1.5 m.
Optionally, the low temperature jacket is provided with a liquid inlet valve and a liquid outlet valve.
Optionally, at least one nitrogen inlet valve is arranged on the sealed cabin.
Optionally, a pressure gauge is arranged on the sealed cabin.
Optionally, the cryogenic liquid is low temperature water at 2-8 ℃.
Optionally, the low-temperature liquid is low-temperature alcohol or liquid nitrogen with the temperature of-20 ℃ to-10 ℃.
Optionally, the temperature of the low-temperature high-purity nitrogen is 2-8 ℃, and the purity is more than or equal to 99.999 percent
Optionally, the pressure in the sealed cabin is 0.1-0.3 Mpa.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) this grain system is cut to closed forced air cooling brace passes through the low temperature liquid and flows through the jacket and carry out the precooling to high temperature fuse-element, and direct contact material prevents the pollution, and at the eager in-process of cutting grain of brace, completely isolated air prevents the deactivation of active material.
(2) The closed air-cooled brace pelletizing system adopts a low-temperature liquid cooling mode, so that the length of a conveying belt can be shortened, the length of the traditional conveying belt needs 10-20 meters, and the length of the conveying belt can be reduced to 1-2 meters.
Drawings
FIG. 1 is a schematic structural diagram of a closed air-cooled riblet dicing system according to an embodiment of the present invention;
1. sealing the bin; 2. a neck ring mold; 3. a low temperature jacket; 4. a granulator; 5. a conveying device; 6. a liquid inlet valve; 7. a liquid outlet valve; 8. a nitrogen inlet valve; 10. and a pressure gauge.
Detailed Description
For a further understanding of the present invention, reference is made to the following detailed description of the invention taken in conjunction with the accompanying FIG. 1.
With reference to fig. 1, the closed air-cooled brace pelletizing system of the present embodiment includes a sealed bin 1, low-temperature high-purity nitrogen gas flows through the sealed bin 1, at least one nitrogen gas inlet valve 8 is disposed on the sealed bin 1, a pressure relief valve is disposed on the sealed bin 1, and the pressure in the sealed bin 1 is 0.1-0.3 Mpa; the mouth mold 2 is communicated with the sealed cabin 1 and is arranged on the left side of the sealed cabin 1; the low-temperature jacket 3 is communicated with the neck mold 2, low-temperature liquid flows through the low-temperature jacket 3, and the material enters the neck mold 2 through the low-temperature jacket 3 to be cut into strips; the feed inlet of the granulator 4 is arranged in the sealed bin 1; the device further comprises a conveying device 5 arranged in the sealed cabin 1, wherein the conveying device 5 is used for conveying materials passing through the neck mold 2 to the granulator 4.
The low-temperature liquid of the closed air-cooling brace granulating system flows through the jacket to pre-cool the high-temperature melt, does not directly contact with the material, prevents pollution, controls the flow of low-temperature high-purity nitrogen through the valve, enters the sealed bin, continuously cools the material, plays a role in protection, and prevents the material from contacting with water vapor and oxygen in the air in the cooling process to inactivate active particles; after heat exchange, the high-temperature melt is cooled to a certain temperature and then extruded into fine strips through a neck mold. The brace is fully contacted with low-temperature high-purity nitrogen on a conveying device, cooled and conveyed to a granulator for granulation, and the process can ensure that air is completely isolated in the material cooling process, so that the active material is prevented from being inactivated; the invention adopts the low-temperature liquid cooling mode, so that the length of the conveying belt can be shortened, the length of the traditional conveying belt needs 10-20 meters, and the length of the conveying belt can be reduced to 1-2 meters.
In the embodiment, in order to make the bracing strips contact with the low-temperature high-purity nitrogen in the sealed cabin 1 as much as possible to improve the cooling effect when the bracing strips are transported by the conveying device 5, the conveying device 5 is a steel mesh conveying belt, and the length of the steel mesh conveying belt is 1.5 m.
In this embodiment, the low temperature jacket 3 is provided with a liquid inlet valve 6 and a liquid outlet valve 7, the liquid inlet valve 6 and the liquid outlet valve 7 are respectively arranged at the lower side and the upper side of the low temperature jacket 3, the low temperature liquid flows through the low temperature jacket 3 to cool the high temperature melt at 180 ℃ to 120 ℃, and the flow speed and the flow rate of the low temperature liquid flowing through the low temperature jacket 3 can be controlled by controlling the opening sizes of the liquid inlet valve 6 and the liquid outlet valve 7, so as to improve the pre-cooling effect on the melt.
In this embodiment, the pressure gauge 10 is disposed on the sealed cabin 1, the pressure in the sealed cabin 1 is 0.1-0.3Mpa, and the gas in the sealed cabin 1 is always kept leaking out, so as to isolate the external air, and an operator can observe the pressure value in the sealed cabin 1 through the pressure gauge 10, so that the internal pressure value fluctuates within the range of 0.1-0.3 Mpa.
In this embodiment, the low-temperature liquid may be low-temperature water at 2-8 ℃, or low-temperature alcohol or liquid nitrogen at-20 ℃ to-10 ℃.
In the embodiment, the temperature of the low-temperature high-purity nitrogen is 2-8 ℃, the purity is more than or equal to 99.999 percent, and two nitrogen inlet valves 8 are arranged on one side of the sealed cabin 1 close to the neck mold 2, so that a large amount of low-temperature high-purity nitrogen is filled in the sealed cabin 1, and the pressure in the sealed cabin is kept to be 0.1-0.3Mpa
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims (6)

1. The utility model provides a closed forced air cooling brace cuts grain system which characterized in that: comprises that
The sealed cabin is internally provided with low-temperature high-purity nitrogen gas;
the mouth mold is communicated with the sealed bin;
the low-temperature jacket is communicated with the mouth mold, and low-temperature liquid flows through the low-temperature jacket;
the feed inlet of the granulator is arranged in the sealed bin;
the device also comprises a conveying device arranged in the sealed bin, wherein the conveying device is used for conveying the materials passing through the mouth die into the granulator;
the conveying device is a steel mesh conveying belt; the length of the steel mesh conveying belt is 1.5 m; a pressure gauge is arranged on the sealed bin; the temperature of the low-temperature high-purity nitrogen is 2-8 ℃, and the purity is more than or equal to 99.999%.
2. The closed air-cooled strand pelletizing system of claim 1, wherein: and a liquid inlet valve and a liquid outlet valve are arranged on the low-temperature jacket.
3. The closed air-cooled strand pelletizing system of claim 1, wherein: and at least one nitrogen inlet valve is arranged on the sealed cabin.
4. The closed air-cooled strand pelletizing system according to any one of claims 1 to 3, characterized in that: the low-temperature liquid is low-temperature water with the temperature of 2-8 ℃.
5. The closed air-cooled strand pelletizing system according to any one of claims 1 to 3, characterized in that: the low-temperature liquid is low-temperature alcohol or liquid nitrogen at the temperature of minus 20 ℃ to minus 10 ℃.
6. The closed air-cooled strand pelletizing system according to any one of claims 1 to 3, characterized in that: the pressure in the sealed cabin is 0.1-0.3 Mpa.
CN202110668479.6A 2021-06-16 2021-06-16 Closed air-cooled brace pelletizing system Active CN113414896B (en)

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Application Number Priority Date Filing Date Title
CN202110668479.6A CN113414896B (en) 2021-06-16 2021-06-16 Closed air-cooled brace pelletizing system

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Application Number Priority Date Filing Date Title
CN202110668479.6A CN113414896B (en) 2021-06-16 2021-06-16 Closed air-cooled brace pelletizing system

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CN113414896B true CN113414896B (en) 2022-09-13

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Citations (8)

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Publication number Priority date Publication date Assignee Title
WO2013004390A1 (en) * 2011-07-06 2013-01-10 Automatik Plastics Machinery Gmbh Method and device for making granules
WO2014119187A1 (en) * 2013-02-04 2014-08-07 出光興産株式会社 Extrusion pelletizer for polycarbonate resin and method for extrusion-pelletizing polycarbonate resin
CN204196201U (en) * 2014-07-11 2015-03-11 宁波市江北哲能精密塑料有限公司 A kind of cooling output device of plastic welding rod
DE102013015190A1 (en) * 2013-09-11 2015-03-12 Automatik Plastics Machinery Gmbh Process for the preparation of superficially crystalline spherical granules by means of dry hot-cutting and apparatus for carrying out the process
CN106182490A (en) * 2016-07-12 2016-12-07 广州傲胜人造草股份有限公司 A kind of manufacture device of chinampa hollow particle
CN206326835U (en) * 2016-12-19 2017-07-14 广东力美新材料科技有限公司 A kind of particles production cooling device
CN110051888A (en) * 2019-04-12 2019-07-26 杭州锐健马斯汀医疗器材有限公司 One kind absorbable compound interface screw sheath flexible and preparation method thereof
CN112171948A (en) * 2020-10-16 2021-01-05 盐城市科恒达材料有限公司 Rotary-cut air cooling device for processing polyvinyl chloride cable material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1090924A (en) * 1964-02-22 1967-11-15 Basf Ag Apparatus for the continuous production of pipes of thermoplastics
US10858762B2 (en) * 2012-02-10 2020-12-08 Kimberly-Clark Worldwide, Inc. Renewable polyester fibers having a low density
CN209141176U (en) * 2018-12-03 2019-07-23 汕头市雷氏塑化科技有限公司 A kind of biodegradable plastics pelletizer with rapid cooling mechanism
CN212312718U (en) * 2020-05-18 2021-01-08 苏州顶材新材料有限公司 Screw extruder

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013004390A1 (en) * 2011-07-06 2013-01-10 Automatik Plastics Machinery Gmbh Method and device for making granules
WO2014119187A1 (en) * 2013-02-04 2014-08-07 出光興産株式会社 Extrusion pelletizer for polycarbonate resin and method for extrusion-pelletizing polycarbonate resin
DE102013015190A1 (en) * 2013-09-11 2015-03-12 Automatik Plastics Machinery Gmbh Process for the preparation of superficially crystalline spherical granules by means of dry hot-cutting and apparatus for carrying out the process
CN204196201U (en) * 2014-07-11 2015-03-11 宁波市江北哲能精密塑料有限公司 A kind of cooling output device of plastic welding rod
CN106182490A (en) * 2016-07-12 2016-12-07 广州傲胜人造草股份有限公司 A kind of manufacture device of chinampa hollow particle
CN206326835U (en) * 2016-12-19 2017-07-14 广东力美新材料科技有限公司 A kind of particles production cooling device
CN110051888A (en) * 2019-04-12 2019-07-26 杭州锐健马斯汀医疗器材有限公司 One kind absorbable compound interface screw sheath flexible and preparation method thereof
CN112171948A (en) * 2020-10-16 2021-01-05 盐城市科恒达材料有限公司 Rotary-cut air cooling device for processing polyvinyl chloride cable material

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