CN101913248A - Method for intermittently stretching geogrid - Google Patents
Method for intermittently stretching geogrid Download PDFInfo
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- CN101913248A CN101913248A CN 201010265044 CN201010265044A CN101913248A CN 101913248 A CN101913248 A CN 101913248A CN 201010265044 CN201010265044 CN 201010265044 CN 201010265044 A CN201010265044 A CN 201010265044A CN 101913248 A CN101913248 A CN 101913248A
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- hauling machine
- sheet material
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Abstract
The invention discloses a method for intermittently stretching a geogrid. The method comprises the following steps of: preprocessing a meshed screen plate, and continuously heating and stretching the meshed screen plate for at most two times. The method is characterized by comprising the following steps of: heating and stretching the meshed screen plate again for at least one time after heating and stretching the meshed screen plate for at most two times; continuous heating and stretching and reheating and restretching are performed intermittently, the meshed screen plate is stretched in the rear sections of the heating sections in corresponding sub sections and is cooled and stretched intermittently in cooling sections between heating sections. The invention provides the method for stretching the high polymer geogrid for at least three times, which makes the meshed screen plate stretched in an intermittently stretching state. Therefore, the strength of stretching products is improved by 20 to 50 percent, the strength is reduced under the conditions of environment resistant use, the stretching proportion is over 1,000 percent and thus, stretching by over ten times is realized. The molecular chain orientation is regular, the product, after being stretched, is free from burrs and whiting and has better appearance, and the equipment investment cost is 30 to 50 percent lower than that of the conventional method for stretching for at most two times.
Description
Technical field
The present invention relates to produce grid or analog, particularly relate to a kind of method for intermittently stretching geogrid with the material drawing and forming of plastics or mecystasis.
Background technology
GSZ is punching on the high molecular polymer sheet material of making through extruding, implements the high molecular polymer net material that orientation stretching forms under heating condition.The long-chain hydrocarbon molecules of polymer rearranges along draw direction, have advantages of higher tensile strength and lower percentage elongation, add the locking action of eyelet to soil, soil is to the passive hindrance function of grid rib, makes GSZ resistance to plucking ability or the consolidation effect of soil added rib component apparently higher than other in soil..Existing unidirectional GSZ stretches, and is mostly to adopt water tank, hot blast, warm-up mill or far infrared to continue heating, carries out Dispensable continuous stressed stretching or divides secondary to continue to stretch along the sheet material length direction, and succeeding stretch can improve the strength ratio of product.Do not see have suitability for industrialized production to use as yet as for repeatedly continue stretching more than the secondary, be still waiting further improvement in the research of laboratory stage.
Summary of the invention
Technical problem to be solved by this invention is the defective that remedies above-mentioned prior art, and a kind of method for intermittently stretching geogrid is provided.
Technical problem of the present invention is solved by the following technical programs.
This method for intermittently stretching geogrid, comprise the preliminary treatment of hole pattern sheet material and at the most secondary continue the heating stretching step.
The characteristics of this method for intermittently stretching geogrid are:
After secondary continues the heating stretching step at the most, comprise and at least once heat stretching step again.
Described to continue to add hot-stretch and add hot-stretch again be intermittently stretching, and described hole pattern sheet material is stretched at the back segment of the heated zones of respective partition section setting, and the cooling section between described heated zones is cooled and rests and is stretched.
Technical problem of the present invention is solved by following further technical scheme.
Be respectively equipped with front end hauling machine and the rear end hauling machine of realizing intermittently stretching at the two ends that add the hot-stretch production line, described hole pattern sheet material is by described front end hauling machine and rear end hauling machine pulling motion, the difference of the draught line speed of described front end hauling machine and rear end hauling machine determines the stretch ratio of described hole pattern sheet material, and described stretch ratio is the percentage multiple that is stretched to original length.
The draught line speed control of described front end hauling machine and rear end hauling machine comprises in advance independent respectively separately control and the control of the locking proportional linkage in later stage.
Described independent respectively separately control in advance, before being included in each heating cabinet unlatching heating, the draught line speed of the described front end hauling machine of independent respectively control is 0.5～1.0m/min, the draught line speed of described rear end hauling machine is 0.5～1.0m/min, open at each heating cabinet and to be heated to hole pattern sheet material temperature when being 90～130 ℃, control promotes the draught line speed of described rear end hauling machine separately, can increase the pulling force that hole pattern sheet material bears, and hole pattern sheet material is stretched gradually.
The locking proportional linkage control in described later stage, be that to reach the draught line speed proportional that locked described front end hauling machine and rear end hauling machine at 700～1200% o'clock to stretch ratio be 1 drawing: (7～12), the draught line speed of interlock described front end hauling machine of control and rear end hauling machine is promoted to 5～30m/min respectively.Promote the draught line speed of front end hauling machine and rear end hauling machine in proportion synchronously, can save the adjustment time, obviously reduce producing defective products in the adjustment process.
Described heated zones is arranged on the branch section and is arranged at least three heating cabinets that add hot-stretch production line centre along the described hole pattern sheet material direction of motion successively.
Described heating cabinet is the tunnel type heating cabinet.
Described heating cabinet is a heating cabinet of controlling heating power automatically, is provided with the thermal detector of automatic detection hole pattern sheet material temperature.
Described thermal detector is the infrared thermometry device.
Preferably, described heating cabinet is the infrared automatic control heating cabinet of band infrared thermometry device, and described infrared wavelength is 0.7～3.0 μ m, its firing rate is in second, in seconds reach desired temperature, and heating is from core to hole pattern sheet material, has the high efficiency of heating surface.
Described cooling is nature cooling and forces a kind of in the cooling.
Described cooling naturally is to expose natural heat dissipation at normal temperatures.
Described pressure cooling is to add the auxiliary heat dissipation condition to comprise air-cooled and water-cooled.
Described hole pattern sheet material is polypropylene (Polypropylene, initialism is PP) hole pattern sheet material, polyethylene (Polyethylene, initialism is PE) a kind of in hole pattern sheet material and high density polyethylene (HDPE) (High density Polyethylene, initialism are HDPE) the hole pattern sheet material.
Preferably, described hole pattern sheet material is that content of carbon black is at least a kind of in 2% PP hole pattern sheet material, PE hole pattern sheet material and the HDPE hole pattern sheet material, and its thickness is 3～15mm.In GSZ, add anti-aging materials such as carbon black, can make it have endurance qualities such as acidproof preferably, alkaline-resisting, corrosion-resistant and anti-aging.
The beneficial effect that the present invention is compared with the prior art is:
The invention provides the repeatedly drawing process of high molecular polymer GSZ at least three times, since science set drawing process mesopore web plate material heating-up temperature and before, the draught line speed proportional of rear end hauling machine, make hole pattern sheet material extended state be in the intermittently stretching state, therefore, elongated article intensity is high by 20～50%, and intensity descends little under the anti-environment behaviour in service, stretch ratio is more than 1000%, can realize the stretching more than 10 times, and molecular chain orientation is more regular, and product is phozy after stretching, and is difficult for turning white, outward appearance is better, particularly lacks 30～50% than the equipment investment of existing succeeding stretch at the most.
The specific embodiment
Below in conjunction with the specific embodiment the inventive method is described.
The specific embodiment one
A kind of is the method for unidirectional GSZ with the PP hole pattern sheet material intermittently stretching that content of carbon black is 2.5%, thickness is 15mm, and following steps are arranged successively:
1) adopt extruder and three-roller to produce PP sheet material;
2) hole pattern that adopts stamping machine that the continuous punching out of PP sheet material is set;
3) PP hole pattern sheet material is sent into the front end hauling machine;
4) PP hole pattern sheet material passes from the center and is arranged on the branch section is arranged in the infrared automatic control that adds three middle band infrared thermometry devices of hot-stretch production line successively along the described hole pattern sheet material direction of motion tunnel type heating cabinets, and infrared wavelength is 0.7～3.0 μ m;
5) PP hole pattern sheet material penetrates the rear end hauling machine again from the center;
6) open front end hauling machine, rear end hauling machine, the draught line speed of independent respectively control front end hauling machine is 0.5～1.0m/min, and the draught line speed of rear end hauling machine is 0.5～1.0m/min, and PP hole pattern sheet material is spued from the rear end hauling machine;
7) open three tunnel type heating cabinets, automatically detect PP hole pattern sheet material temperature by the infrared thermometry device, and control three tunnel type heating cabinet power automatically, when PP hole pattern sheet material temperature reaches 90 ℃, control rear end hauling machine quickens separately, can increase the pulling force that PP hole pattern sheet material bears, PP hole pattern sheet material is stretched gradually;
8) after PP hole pattern sheet material stretch ratio is 700%, the draught line speed proportional of locking front end hauling machine and rear end hauling machine is 1: 7, the draught line speed of interlock control front end hauling machine is promoted to 0.5～3.3m/min, the draught line speed of rear end hauling machine is promoted to 3.5～21.0m/min, can save the adjustment time, obviously reduce producing defective products in the adjustment process;
9) prescind the PP hole pattern sheet material that does not stretch at rear end hauling machine discharge opening, be unidirectional PP GSZ product being stretched to the PP hole pattern sheet material rolling of setting requirement.
The specific embodiment two
A kind of is the method for unidirectional GSZ with the PE hole pattern sheet material intermittently stretching that content of carbon black is 3.5%, thickness is 10mm, and following steps are arranged successively:
1) adopt extruder and three-roller to produce PE sheet material;
2) hole pattern that adopts stamping machine that the continuous punching out of PE sheet material is set;
3) PE hole pattern sheet material is sent into the front end hauling machine;
4) PE hole pattern sheet material passes from the center and is arranged on the branch section is arranged in the infrared automatic control that adds four middle band infrared thermometry devices of hot-stretch production line successively along the hole pattern sheet material direction of motion tunnel type heating cabinets, and infrared wavelength is 0.7～3.0 μ m;
5) PE hole pattern sheet material penetrates the rear end hauling machine again from the center;
6) open front end hauling machine, rear end hauling machine, the draught line speed of independent respectively control front end hauling machine is 0.5～1.0m/min, and the draught line speed of rear end hauling machine is 0.5～1.0m/min, and PE hole pattern sheet material is spued from the rear end hauling machine;
7) open four tunnel type heating cabinets, automatically detect PE hole pattern sheet material temperature by the infrared thermometry device, and control four tunnel type heating cabinet power automatically, when PE hole pattern sheet material temperature reaches 90 ℃, control rear end hauling machine quickens separately, can increase the pulling force that PE hole pattern sheet material bears, PE hole pattern sheet material is stretched gradually;
8) after PE hole pattern sheet material stretch ratio is 950%, the draught line velocity ratio of locking front end hauling machine and rear end hauling machine is 1: 9.5, the draught line speed of interlock control front end hauling machine is promoted to 0.5～3.3m/min, the draught line speed of rear end hauling machine is promoted to 3.5～21.0m/min, can save the adjustment time, obviously reduce producing defective products in the adjustment process;
9) prescind the PE hole pattern sheet material that does not stretch at rear end hauling machine discharge opening, be unidirectional PE GSZ product being stretched to the PE hole pattern sheet material rolling of setting requirement.
The specific embodiment three
A kind of is the method for unidirectional GSZ with the HDPE hole pattern sheet material intermittently stretching that content of carbon black is 4%, thickness is 3mm, and following steps are arranged successively:
1) adopt extruder and three-roller to produce HDPE sheet material;
2) hole pattern that adopts stamping machine that the continuous punching out of HDPE sheet material is set;
3) HDPE hole pattern sheet material is sent into the front end hauling machine;
4) HDPE hole pattern sheet material passes from the center and is arranged on the branch section is arranged in the infrared automatic control that adds five middle band infrared thermometry devices of hot-stretch production line successively along the hole pattern sheet material direction of motion tunnel type heating cabinets, and infrared wavelength is 0.7～3.0 μ m;
5) HDPE hole pattern sheet material penetrates the rear end hauling machine again from the center;
6) open front end hauling machine, rear end hauling machine, the draught line speed of independent respectively control front end hauling machine is 0.5～1.0m/min, and the draught line speed of rear end hauling machine is 0.5～1.0m/min, and HDPE hole pattern sheet material is spued from the rear end hauling machine;
7) open five tunnel type heating cabinets, automatically detect HDPE hole pattern sheet material temperature by the infrared thermometry device, and control five tunnel type heating cabinet power automatically, when HDPE hole pattern sheet material temperature reaches 90 ℃, control rear end hauling machine quickens separately, can increase the pulling force that HDPE hole pattern sheet material bears, HDPE hole pattern sheet material is stretched gradually;
8) after HDPE hole pattern sheet material stretch ratio is 1200%, the draught line velocity ratio of locking front end hauling machine and rear end hauling machine is 1: 12, the draught line speed of interlock control front end hauling machine is promoted to 0.5～3.3m/min, the draught line speed of rear end hauling machine is promoted to 3.5～21.0m/min, can save the adjustment time, obviously reduce producing defective products in the adjustment process;
9) prescind the HDPE hole pattern sheet material that does not stretch at rear end hauling machine discharge opening, be unidirectional HDPE GSZ product being stretched to the HDPE hole pattern sheet material rolling of setting requirement.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention; make some alternative or obvious modification that are equal to without departing from the inventive concept of the premise; and performance or purposes are identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (10)
1. method for intermittently stretching geogrid, comprise the preliminary treatment of hole pattern sheet material and at the most secondary continue the heating stretching step, it is characterized in that:
After secondary continues the heating stretching step at the most, comprise and at least once heat stretching step again;
Described to continue to add hot-stretch and add hot-stretch again be intermittently stretching, and described hole pattern sheet material is stretched at the back segment of the heated zones of respective partition section setting, and the cooling section between described heated zones is cooled and rests and is stretched.
2. method for intermittently stretching geogrid as claimed in claim 1 is characterized in that:
Be respectively equipped with front end hauling machine and the rear end hauling machine of realizing intermittently stretching at the two ends that add the hot-stretch production line, described hole pattern sheet material is by described front end hauling machine and rear end hauling machine pulling motion, and the difference of the draught line speed of described front end hauling machine and rear end hauling machine determines the stretch ratio of described hole pattern sheet material.
3. method for intermittently stretching geogrid as claimed in claim 1 or 2 is characterized in that:
The draught line speed control of described front end hauling machine and rear end hauling machine comprises in advance independent respectively separately control and the control of the locking proportional linkage in later stage.
4. method for intermittently stretching geogrid as claimed in claim 3 is characterized in that:
Described independent respectively separately control in advance, before being included in each heating cabinet unlatching heating, the draught line speed of the described front end hauling machine of independent respectively control is 0.5～1.0m/min, the draught line speed of described rear end hauling machine is 0.5～1.0m/min, open at each heating cabinet and to be heated to hole pattern sheet material temperature when being 90～130 ℃, control promotes the draught line speed of described rear end hauling machine separately.
5. method for intermittently stretching geogrid as claimed in claim 3 is characterized in that:
The locking proportional linkage control in described later stage, be that to reach the draught line speed proportional that locked described front end hauling machine and rear end hauling machine at 700～1200% o'clock to stretch ratio be 1 drawing: (7～12), the draught line speed of interlock described front end hauling machine of control and rear end hauling machine is promoted to 5～30m/min respectively.
6. method for intermittently stretching geogrid as claimed in claim 3 is characterized in that:
Described heated zones is arranged on the branch section and is arranged at least three heating cabinets that add hot-stretch production line centre along the described hole pattern sheet material direction of motion successively.
7. method for intermittently stretching geogrid as claimed in claim 6 is characterized in that:
Described heating cabinet is a heating cabinet of controlling heating power automatically, is provided with the thermal detector of automatic detection hole pattern sheet material temperature.
8. method for intermittently stretching geogrid as claimed in claim 7 is characterized in that:
Described heating cabinet is the infrared automatic control heating cabinet of band infrared thermometry device, and described infrared wavelength is 0.7～3.0 μ m.
9. method for intermittently stretching geogrid as claimed in claim 8 is characterized in that:
Described cooling is nature cooling and forces a kind of in the cooling.
10. method for intermittently stretching geogrid as claimed in claim 9 is characterized in that:
Described hole pattern sheet material is polypropylene (Polypropylene, initialism is PP) hole pattern sheet material, polyethylene (Polyethylene, initialism is PE) a kind of in hole pattern sheet material and high density polyethylene (HDPE) (Highdensity Polyethylene, initialism are HDPE) the hole pattern sheet material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010265044 CN101913248A (en) | 2010-08-27 | 2010-08-27 | Method for intermittently stretching geogrid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010265044 CN101913248A (en) | 2010-08-27 | 2010-08-27 | Method for intermittently stretching geogrid |
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| CN101913248A true CN101913248A (en) | 2010-12-15 |
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| CN 201010265044 Pending CN101913248A (en) | 2010-08-27 | 2010-08-27 | Method for intermittently stretching geogrid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116674189A (en) * | 2023-07-27 | 2023-09-01 | 泸州胜扬新材料有限公司 | Geogrid single biaxial stretching apparatus for producing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1460590A (en) * | 2003-06-18 | 2003-12-10 | 湖北力特土工材料有限公司 | Production method of civil engineering grille |
| US20040062615A1 (en) * | 2002-06-27 | 2004-04-01 | Walsh Anthony T. | Geogrid or mesh structure |
| CN2629956Y (en) * | 2003-06-18 | 2004-08-04 | 湖北力特土工材料有限公司 | Earthwork grille stretching device |
| JP2008303583A (en) * | 2007-06-06 | 2008-12-18 | Public Works Research Institute | Structure of artificial ground |
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2010
- 2010-08-27 CN CN 201010265044 patent/CN101913248A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040062615A1 (en) * | 2002-06-27 | 2004-04-01 | Walsh Anthony T. | Geogrid or mesh structure |
| CN100361806C (en) * | 2002-06-27 | 2008-01-16 | 坦萨国际有限公司 | X-ray fluuorroscopy device |
| CN1460590A (en) * | 2003-06-18 | 2003-12-10 | 湖北力特土工材料有限公司 | Production method of civil engineering grille |
| CN2629956Y (en) * | 2003-06-18 | 2004-08-04 | 湖北力特土工材料有限公司 | Earthwork grille stretching device |
| JP2008303583A (en) * | 2007-06-06 | 2008-12-18 | Public Works Research Institute | Structure of artificial ground |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116674189A (en) * | 2023-07-27 | 2023-09-01 | 泸州胜扬新材料有限公司 | Geogrid single biaxial stretching apparatus for producing |
| CN116674189B (en) * | 2023-07-27 | 2023-11-10 | 泸州胜扬新材料有限公司 | Geogrid single biaxial stretching apparatus for producing |
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Application publication date: 20101215 |