CN1068292A - The preparation method of plastic expansion casing for flexible roof bolt in tunnel - Google Patents
The preparation method of plastic expansion casing for flexible roof bolt in tunnel Download PDFInfo
- Publication number
- CN1068292A CN1068292A CN 92106235 CN92106235A CN1068292A CN 1068292 A CN1068292 A CN 1068292A CN 92106235 CN92106235 CN 92106235 CN 92106235 A CN92106235 A CN 92106235A CN 1068292 A CN1068292 A CN 1068292A
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- CN
- China
- Prior art keywords
- plastic expansion
- tunnel
- filler
- expansion casing
- carbon black
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- 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.)
- Pending
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- Compositions Of Macromolecular Compounds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the plastics forming technology, particularly a kind of preparation method of plastic expansion casing for flexible roof bolt in tunnel.Selected raw material mainly is made up of thermoplastics and filler, auxiliary agent, treated raw material, filler, auxiliary agent, and preplasticizing, plasticizing, extrusion molding compression moulding, production processes such as cooling and shaping prepare plastic expansion casing for flexible roof bolt in tunnel.
Description
The invention belongs to the plastics forming technology, particularly a kind of preparation method of plastic expansion casing for flexible roof bolt in tunnel.
At present, in use there is the anchor force instability in shaft and drift supporting anchor pole and the frame canopy rigidity support forms such as wedge-type, resin formula, cement formula of adopting to some extent, the cost height, difficulty is installed, and problems such as yield supporting poor performance have a strong impact on and use and keep the safety in production.
The objective of the invention is to overcome above technical deficiency, and a kind of preparation method of plastic expansion casing for flexible roof bolt in tunnel is provided, the anchor pole plastic expansion casing of production, with low cost, technology is easy, and is applicable to all kinds of coal rock roof plates and tunnel.
The present invention is achieved in that the production environment special according to roadway, and plastic expansion casing should have technical features such as fire-retardant, antistatic, that tension is stretched.Selected raw material mainly is made up of thermoplastics and filler, auxiliary agent, and thermoplastics is selected high-pressure polyethylene, polyvinyl chloride, polypropylene and the high pressure polyethylene resin of reuse.Wherein polyvinyl chloride (PVC) RESINS have fire-retardant, from fiery self-extinguishing energy; High-pressure polyethylene and acrylic resin improve toughness, and tension is stretched with low temperature resistant; Initiate high pressure polyethylene resin is in order to compensational regeneration plastics physicochemical property.Filler is selected lime carbonate, Graphite Powder 99, acetylene carbon ink, conductive carbon ink, and wherein lime carbonate and Graphite Powder 99 are gained in strength and are reduced contraction ratio, Shawinigan black, graphitized carbon black is a conductive filler material, and its volume resistivity is respectively 0.25K Ω CM and 0.38K Ω CM, and the static volume resistivity is lower than 1.0 * 10
9K Ω CM satisfies the roadway safety production rules.Select raw material, filler, auxiliary agent through handling, again through preplasticizing, plasticizing, extrusion molding press forming, production processes such as cooling process, preparation plastic expansion casing for flexible roof bolt in tunnel.
Producing process to plastic expansion casing for flexible roof bolt in tunnel of the present invention specifically describes below.
Select 2 of general-purpose plastics extruding machine Φ 100, Φ 90 specifications, 1 of hand press, box-like forming mould 1 cover of design team adopts hot extrude, the plastic processing flow process of colding pressing voluntarily.
Embodiment
(1) take by weighing (weight part) by following prescription:
Reuse high-pressure polyethylene 58
Polyvinyl chloride (PVC) RESINS 10
Acrylic resin 8
High pressure polyethylene resin 7
Paris white 5
Graphite Powder 99 4
Acetylene carbon black 3(volume resistivity 0.25K Ω CM)
Conductive carbon black 5(volume resistivity 0.38K Ω CM)
An amount of, the homemade level of paraffin wax
Mixed stabilizer is an amount of
(2) with the frequent warm water washing of reuse high-pressure polyethylene 2 times, drying treatment then:
(3) before resin uses, sieve through 60 eye mesh screens;
(4) with Shawinigan black, graphitized carbon black mixes, and ratio of filler bitumen is 1: 1.2,1/2 amount DOP is added in the carbon black stir, and during grinding, 1/2 amount DOP with remainder adds again, through the regrind form slurry;
(5) preplasticizing granulation
With above-mentioned treated raw material, filler, auxiliary agent, insert extruding machine, the preplasticizing temperature is 100-130 ℃, 35 rev/mins of screw speeds are extruded pelletizing;
(6) extrusion molding is gone out masterbatch resin and insert second extruding machine, plasticization temperature is 130-160 ℃; 35 rev/mins of screw speeds;
(7) with the fusion viscous state material of extruding, inject the compression moulding of anchor pole plastic expansion casing mould, mold preheating temperature 40-50 ℃, back pressure 10-25MPA, inject time 3-6S, dwell time 2-4S, cooling time 10-15S, total cycle is 15-25S;
(8) die sinking
The artificial pressing machine of adjusting is removed patrix, transfers to core, takes out product;
(9) cooling shaping
Goods are put into 5-15 ℃ water, and the time is 15-30S, and the product setting is modified to finished product.
The plastic expansion casing for flexible roof bolt in tunnel technical feature
| Project | Technical feature |
| Integral fastening power | ≥48KN |
| Shell material resistance to compression deflection | 15%(±5%) |
| Shell material surfaces externally and internally resistance | 〈1.0×10 9KΩ·CM |
| Borehole diameter | Φ43± 10 4MM |
| Envrionment temperature | -30～50℃ |
| Product percent of pass | More than 95% |
The preparation method of plastic expansion casing for flexible roof bolt in tunnel, technology is easy, and reasonable in technology is for roadway provides a kind of science, practical plastic expansion casing for flexible roof bolt in tunnel with multiple supportings such as anchor net, anchor beam, anchor supporting plate, anchor sprays.
Claims (1)
1, a kind ofly be raw material and be equipped with filler, auxiliary agent, produce the preparation method of plastic expansion casing for flexible roof bolt in tunnel, it is characterized in that making by following 9 step production technique by high-pressure polyethylene, polyvinyl chloride, polypropylene:
(1) take by weighing (weight part) by following prescription:
Reuse high-pressure polyethylene 58
Polyvinyl chloride (PVC) RESINS 10
Acrylic resin 8
High pressure polyethylene resin 7
Paris white 5
Graphite Powder 99 4
Acetylene carbon black 3 (volume resistivity 0.25K Ω CM)
Conductive carbon black 5 (volume resistivity 0.38K Ω CM)
An amount of, the homemade level of paraffin wax
Mixed stabilizer is an amount of
(2) with the frequent warm water washing of reuse high-pressure polyethylene 2 times, drying treatment then:
(3) before resin uses, sieve through 60 eye mesh screens:
(4) with Shawinigan black, graphitized carbon black mixes, and ratio of filler bitumen is 1: 1.2, will 1/2 amount DOP add in the carbon black and stir, during grinding, 1/2 amount DOP with remainder adds again, through the regrind form slurry:
(5) preplasticizing granulation
With above-mentioned treated raw material, filler, auxiliary agent, insert extruding machine, the preplasticizing temperature is 100-130 ℃, 35 rev/mins of screw speeds are extruded pelletizing:
(6) extrusion molding is gone out masterbatch resin and insert second extruding machine, plasticization temperature is 130-160 ℃: 35 rev/mins of screw speeds:
(7) with the fusion viscous state material of extruding, inject the compression moulding of anchor pole plastic expansion casing mould, mold preheating temperature 40-50 ℃, back pressure 10-25MPA, inject time 3-6S, dwell time 2-4S, cooling time 10-15S, total cycle is 15-25S:
(8) die sinking
The artificial pressing machine of adjusting is removed patrix, transfers to core, takes out product;
(9) cooling shaping
Goods are put into 5-15 ℃ water, and the time is 15-30S, and the product setting is modified to finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106235 CN1068292A (en) | 1992-06-11 | 1992-06-11 | The preparation method of plastic expansion casing for flexible roof bolt in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106235 CN1068292A (en) | 1992-06-11 | 1992-06-11 | The preparation method of plastic expansion casing for flexible roof bolt in tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1068292A true CN1068292A (en) | 1993-01-27 |
Family
ID=4941926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106235 Pending CN1068292A (en) | 1992-06-11 | 1992-06-11 | The preparation method of plastic expansion casing for flexible roof bolt in tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1068292A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384612C (en) * | 2004-11-04 | 2008-04-30 | 湖北工业大学 | Reciprocal plasticizing extrusion and injection apparatus |
| CN100478150C (en) * | 2006-10-10 | 2009-04-15 | 开平拓商工程塑料线有限公司 | Braided tape for furniture and production method thereof |
| CN100999089B (en) * | 2006-12-28 | 2010-05-12 | 开平拓商工程塑料线有限公司 | Furniture braided belt and its manufacturing method |
| CN104070661A (en) * | 2013-11-27 | 2014-10-01 | 洛阳豪特现代测试技术有限公司 | Waste plastic plasticizing, extruding and granulating process and device |
| CN106893150A (en) * | 2017-03-27 | 2017-06-27 | 南京露泰交通设施有限公司 | It is integrally formed the preparation method of guardrail for road |
-
1992
- 1992-06-11 CN CN 92106235 patent/CN1068292A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384612C (en) * | 2004-11-04 | 2008-04-30 | 湖北工业大学 | Reciprocal plasticizing extrusion and injection apparatus |
| CN100478150C (en) * | 2006-10-10 | 2009-04-15 | 开平拓商工程塑料线有限公司 | Braided tape for furniture and production method thereof |
| CN100999089B (en) * | 2006-12-28 | 2010-05-12 | 开平拓商工程塑料线有限公司 | Furniture braided belt and its manufacturing method |
| CN104070661A (en) * | 2013-11-27 | 2014-10-01 | 洛阳豪特现代测试技术有限公司 | Waste plastic plasticizing, extruding and granulating process and device |
| CN106893150A (en) * | 2017-03-27 | 2017-06-27 | 南京露泰交通设施有限公司 | It is integrally formed the preparation method of guardrail for road |
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| RJ01 | Rejection of invention patent application after publication |