CN1504321A - Lead boron polyethylene sheet forming process - Google Patents
Lead boron polyethylene sheet forming process Download PDFInfo
- Publication number
- CN1504321A CN1504321A CNA021538387A CN02153838A CN1504321A CN 1504321 A CN1504321 A CN 1504321A CN A021538387 A CNA021538387 A CN A021538387A CN 02153838 A CN02153838 A CN 02153838A CN 1504321 A CN1504321 A CN 1504321A
- Authority
- CN
- China
- Prior art keywords
- lead
- sheet forming
- extruder
- forming technology
- boron polythene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 23
- 229910052796 boron Inorganic materials 0.000 title claims abstract description 21
- 239000004698 Polyethylene Substances 0.000 title abstract 4
- -1 polyethylene Polymers 0.000 title abstract 4
- 238000007652 sheet-forming process Methods 0.000 title abstract 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title abstract 2
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims description 17
- 238000005516 engineering process Methods 0.000 claims description 16
- 239000008188 pellet Substances 0.000 claims description 13
- 238000005469 granulation Methods 0.000 claims description 10
- 230000003179 granulation Effects 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 4
- 230000002285 radioactive effect Effects 0.000 abstract description 2
- 238000003490 calendering Methods 0.000 abstract 1
- 230000001988 toxicity Effects 0.000 abstract 1
- 231100000419 toxicity Toxicity 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 2
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
A lead boron polyethylene sheet forming process relates to a polyethylene sheet forming process for radioactive shielding. The technical scheme of the invention is that the evenly mixed polyethylene material is plasticized in an extruder and then extruded by a granulating die, and then plasticized in the extruder and extruded by a plate die after being cooled, and simultaneously, a double-roller calender roll is used for calendaring and traction. The process has the advantages of small investment on equipment, simple operation and less possibility of lead vapor volatilization in the operation process, thereby not only reducing the pollution to the atmosphere, but also furthest reducing the toxicity to workers.
Description
Technical field
The present invention relates to a kind of sheet plastic moulding process, be specifically related to a kind of tygon sheet forming technology that can be used for radioactive shield.
Background technology
In the sheet forming technology of conventional plastic industry, generally adopt rolling process with the mixture forming that mixes at the lead-boron polythene similar material, as " high-effect shielding material lead-boron polythene " (" Nuclear Power Engineering " V01.15, No.4, P370～374) described moulding process adopts two roller labor and materials, two roller slices exactly.As everyone knows, this technology has shortcomings such as polluting big, complicated operation, and its major equipment comprises kneader, plasticizing machine, calender and boiler etc., invests very big.
Summary of the invention
The object of the present invention is to provide a kind of simple and little lead-boron polythene sheet forming technology of equipment investment of little, technological operation of polluting.
The present invention seeks to realize like this: will mix and cooled off broken lead-boron polythene material and put into extruder plasticizing back and extrude and be cooled to no longer sticking the refining with the granulation mould, then the pellet of cooling being put into again extruder plasticizing back extrudes with board mould, and with two roll-in smooth roll press polish, traction, cooling makes thin plate.
In order better to realize purpose of the present invention, preferred version disclosed by the invention is: after the lead-boron polythene pellet that mixes is put into the extruder plasticizing, maintain 90～150 ℃ at extruder temperature, the cutting knife rotating speed is 220～350 rev/mins, motor speed is under 600～800 rev/mins the condition it to be extruded with the granulation mould, and the pellet of extruding is cooled to no longer adhesion on the vibrating spring bed, again pellet is put into the extruder plasticizing, be 12Hz at main motor line frequency then, the feed frequency is to use the board mould extruded material under the condition of 21Hz, and rise to 160～170 ℃ from 110～120 ℃ from being fed to discharging extruder working temperature, use two roll-in smooth roll press polish simultaneously, traction, its frequency is 5.0～6.0 hertz, uses cooling and shaping plate cooling and shaping at last.
The extruder working temperature was that 90 ℃, motor speed are that 800 rev/mins, cutting knife rotating speed are 350 rev/mins when the present invention had the scheme of choosing to be granulation most.
Plastifying material airtight carrying out in extruder among the present invention reduces greatly with the contact area of air, pollutes thereby effectively reduce lead steam; The used major equipment of technology is extruder and cooling spring mattress bed, and it only is about 1/3 of rolling process that its investment is calculated according to the market price, and simple to operate; The application of vibrating spring bed has solved the lead-boron polythene pellet because density is big, the big problem of adhesion easily of specific heat in the technology.
Embodiment
The invention will be further described below by embodiment.
Embodiment 1.
1. will mix, cool off broken lead-boron polythene material and put into extruder, after plastifying, extrude by the granulation mould, when extruding in the extruder temperature of charge to maintain 90 ℃, motor speed be that 800 rev/mins, cutting knife rotating speed are 350 rev/mins;
2. the pellet of extruding is cooled to no longer adhesion on the vibrating spring bed;
3. the pellet of cooling is put into extruder, extrude by board mould the plasticizing back, and with two roll-in smooth roll press polish, traction, master's electric machine frequency is that 12Hz, feed frequency are 21Hz when extruding, rise to 160 ℃ from being fed to discharging extruder working temperature from 110 ℃, the press polish of two roll-in smooth roll, lock are 6.0 hertz, use cooling and shaping plate cooling and shaping at last.
Embodiment 2.
1. will mix, cool off broken lead-boron polythene material and put into extruder, after plastifying, extrude by the granulation mould, when extruding in the extruder temperature of charge to maintain 100 ℃, motor speed be that 700 rev/mins, cutting knife rotating speed are 300 rev/mins;
2. the pellet of extruding is cooled to no longer adhesion on the vibrating spring bed;
3. the pellet of cooling is put into extruder, extrude by board mould the plasticizing back, and with two roll-in smooth roll press polish, traction, master's electric machine frequency is that 12Hz, feed frequency are 21Hz when extruding, rise to 170 ℃ from being fed to discharging extruder working temperature from 120 ℃, the press polish of two roll-in smooth roll, lock are 5.6 hertz, use cooling and shaping plate cooling and shaping at last.
Embodiment 3.
1. will mix, cool off broken lead-boron polythene material and put into extruder, and extrude by the granulation mould after plastifying, temperature of charge maintains between 90～150 ℃ in the extruder when extruding, motor speed is that 600 rev/mins, cutting knife rotating speed are 220 rev/mins;
2. the pellet of extruding is cooled to no longer adhesion on the vibrating spring bed;
3. the pellet of cooling is put into extruder, extrude by board mould the plasticizing back, and with two roll-in smooth roll press polish, traction, master's electric machine frequency is that 12Hz, feed frequency are 21Hz when extruding, rise to 165 ℃ from being fed to discharging extruder working temperature from 120 ℃, the press polish of two roll-in smooth roll, lock are 5.0 hertz, use cooling and shaping plate cooling and shaping at last.
Claims (8)
1. lead-boron polythene sheet forming technology, it is characterized in that the lead-boron polythene pellet that mixes is put into extruder plasticizing back extrudes and be cooled to no longer adhesion by the granulation mould, the pellet of cooling being put into extruder plasticizing back extrudes by board mould again, and, make thin plate with two roll-in smooth roll press polish, traction.
2. lead-boron polythene sheet forming technology according to claim 1, the extruder working temperature maintains 90～120 ℃ when it is characterized in that by granulation mould extruded material, and motor speed is that 600～800 rev/mins, cutting knife rotating speed are 220～350 rev/mins.
3. lead-boron polythene sheet forming technology according to claim 1 and 2 is characterized in that the material of extruding by the granulation mould cools off on the vibrating spring bed.
4. lead-boron polythene sheet forming technology according to claim 1 and 2, the extruder working temperature rises to 160～170 ℃ from 110～120 ℃ when it is characterized in that by the board mould extruded material.
5. lead-boron polythene sheet forming technology according to claim 4 is characterized in that main motor line frequency is that 12Hz, feed frequency are 21H.
6. lead-boron polythene sheet forming technology according to claim 1 and 2 is characterized in that two roll-in bachelor press polish, lock are 5.0～6.0 hertz.
7. lead-boron polythene sheet forming technology according to claim 1 and 2 is characterized in that thin plate after the press polish is with cooling and shaping plate cooling and shaping.
8. lead-boron polythene sheet forming technology according to claim 1 and 2, the extruder working temperature is that 90 ℃, motor speed are that 800 rev/mins, cutting knife rotating speed are 350 rev/mins when it is characterized in that granulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02153838 CN1236905C (en) | 2002-12-05 | 2002-12-05 | Lead boron polyethylene sheet forming process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02153838 CN1236905C (en) | 2002-12-05 | 2002-12-05 | Lead boron polyethylene sheet forming process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1504321A true CN1504321A (en) | 2004-06-16 |
| CN1236905C CN1236905C (en) | 2006-01-18 |
Family
ID=34235324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02153838 Expired - Lifetime CN1236905C (en) | 2002-12-05 | 2002-12-05 | Lead boron polyethylene sheet forming process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1236905C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323109C (en) * | 2004-10-21 | 2007-06-27 | 中国核动力研究设计院 | Method for processing lead boron polyethylene shielding material block |
| CN112961423A (en) * | 2021-02-23 | 2021-06-15 | 中国核动力研究设计院 | Lead-boron polyethylene plate and size control method |
-
2002
- 2002-12-05 CN CN 02153838 patent/CN1236905C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323109C (en) * | 2004-10-21 | 2007-06-27 | 中国核动力研究设计院 | Method for processing lead boron polyethylene shielding material block |
| CN112961423A (en) * | 2021-02-23 | 2021-06-15 | 中国核动力研究设计院 | Lead-boron polyethylene plate and size control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1236905C (en) | 2006-01-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20060118 |