CN102877641B - Production method for durable plastic surface waterproof building template - Google Patents
Production method for durable plastic surface waterproof building template Download PDFInfo
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- CN102877641B CN102877641B CN201210354370.6A CN201210354370A CN102877641B CN 102877641 B CN102877641 B CN 102877641B CN 201210354370 A CN201210354370 A CN 201210354370A CN 102877641 B CN102877641 B CN 102877641B
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Abstract
The invention relates to a production method for a durable plastic surface waterproof building template and belongs to the technical field of plastic wood composite building templates. The method comprises the steps of rolling holes on a base plate, preheating and dehumidifying, extruding and coating plastic, rolling and compounding, cooling and solidifying, and cutting and forming. After the base plate is subjected to hole rolling and preheating, hot-melt plastic is directly extruded onto the surface of the base plate by an extruding machine, the plastic coated surface is subjected to rolling and compounding by a pressing roller, and the plastic surface and the base plate are formed through rolling at one step, so that the production process is simple and high in efficiency. The surface and the base plate are intersected transversely and longitudinally and connected firmly, so that delamination and cracking are avoided, the service life is long and the quality of the template is high.
Description
Technical field
The invention belongs to plastic-wood building formwork technical field, specifically relate to a kind of production method of moulding wooden complex architectural template.
Background technology
Construction formwork is as the important construction tool of concrete structure engineering, and the fine or not direct relation of its quality the quality of engineering construction, cost and benefit.According to statistics, in Cast-in-situ Concrete Structural Engineering, form work engineering generally accounts for 20% ~ 30% of concrete structure engineering cost, accounts for 30% ~ 40% of the engineering amount of labour used.Along with the fast development of real estate industry of China, the consumption of construction formwork increases year by year, estimates 2012, and China's construction formwork industry output will reach 2.2 hundred million square meter.The construction formwork of existing use mainly contains steel template, wood plywood template and bamboo plywood form.Steel form make and working service cost high, burden for users weight.And the wooden template such as wood plywood template and bamboo plywood form also exists lumber consumption in a large number, moistureproof, acid-alkali-corrosive-resisting poor performance, easily ftractures, the shortcomings such as application life is short.Along with the minimizing year by year of China's timber resources, improve the quality of wooden template, increase reusable number of times, the application life extending template is imperative, is also current economizing on resources, alleviates the inevitable choice of the cost of building trade.
The construction formwork that Wood plastic composite makes, as new generation of green construction formwork, has the double grading of timber and plastics concurrently.It is made up of wooden plywood and plastics surface layer, the building masterplate connected with face, wooden substrate face by plastics surface layer, its surface layer and substrate in conjunction with defective tightness, be easy to after using generating plane pull-up from problem.For the problem that solution surface layer and core formed of wood depart from, plastic sheet bonds on veneer by the agent that first sticks with glue had, then carries out hot pressing compound.The template of processing and fabricating in this way, plastics surface layer and core formed of wood bond strength increase to some extent, but top layer connects with substrate or face, face, and template uses a period of time, after sandwich layer water suction, its adhesive layer adhesive strength diminishes, and the problem of surface layer cracking also easily occurs after using this template, the number of times of its Reusability generally no more than 30 times.And aborning, plastics surface layer and wooden substrate need make respectively, secondary compound, and complex procedures, production efficiency is low.Surface layer and substrate compound tense need use a large amount of bonding adhesive, and hazardous substances wherein is easily heated volatilization contaminated environment.
The patent No. be 200810244448.2 Chinese patent disclose one " production method of wood plastic building mould ", the method also comprises the making of surface layer material and surface layer material crimps shaping two steps with wooden boards.The problem that it comes unstuck for solving surface layer, is provided with a lining between surface layer and flaggy, and at lining coated on both sides PUR.This method also also exists complex procedures, and working (machining) efficiency is low, the shortcoming that cost of production is high.Though be provided with the materials such as non-woven fabrics, cotton, burlap between surface layer and layer of wood, two interlayers are still for face, face connects, and bond strength is inadequate; And lining also exists suction water problem, easily cause after Reusability coming unglued or delamination, application life is short.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of long service life, once-combined shaping, and production efficiency is high, the plastic-wood building formwork production method of cleanliness without any pollution.
For solving the problems of the technologies described above, the present invention includes following steps:
1) substrate rolls cave: on substrate two sides by certain density respectively ecto-entad roll thorn depression;
2) preheating dehumidifying: toast rolling the substrate surface behind cave, substrate skin temperature is raised rapidly, dispel substrate shallow top layer moisture;
3) extrude to cover and mould: utilize plastic extruder extrusioning thermoplastic plastic, molten plastic is overlying on the substrate surface after preheating;
4) roll-in compound: utilize pressure roller to mould surface carry out roll-in to covering, partial melting plastics are clamp-oned in depression, make bottom plastics surface layer with the surface of substrate and depression inwall close proximity, plastics surface layer external surface is smooth;
5) cooling curing: the sheet material after roll-in compound is cooled;
6) shaping is cut: sheet material after cooling is cut by specification.
Preferably the degree of depth of described depression is 1 to 4 millimeter, and depression is uniformly distributed on plate face, and its adjacent depression Edge Distance is 5 to 25 millimeters; After basal plate preheating, plate surface temperature is 100 to 320 degree.
Further preferably described substrate adopts multi-plywood, and pocket depth is 1.5 to 2 millimeters; After basal plate preheating, its plate surface temperature is 180 to 220 degree; Described thermoplastic is one or more the mixed plastic in polyethylene, polypropylene, polyvinyl chloride, is also added with filler for plastic in surface layer.
Heat molten type plastics are directly expressed into substrate surface by extruder by the present invention, and are moulded surface by pressure roller carry out roll-in compound, plastics surface layer and substrate rolling formation to covering, and extrude while roll-in, and can uninterruptedly produce continuously, production efficiency is high.Substrate surface is provided with the depression rolling thorn and formed, the many uneven thorn-like wood fibers of depression marginal existence.Hot melting plastic is clamp-oned after depression through roll-in, is formed on the one hand and stretch into the lower convex of depression bottom plastics surface layer, and it by the spinous fiber of depression inner circumferential parcel wherein, makes to have pricked " root " in a substrate bottom plastics surface layer simultaneously.Surface layer and substrate are cross-linked in horizontal and vertical formation and connect, and are connected firmly, not easily delamination and cracking, long service life, reusable more than 30 times under normal circumstances.Plastics surface layer directly connects with substrate, not only saves material, and reduces cost of production, and production technology is simple, and efficiency is high, it also avoid bonding adhesive in production and to volatilize the environment pollution caused, can realize cleaner production.Substrate is through heating and dehumidification, and its surface temperature raises fast, eliminates the steam on substrate top layer, is conducive to plastics and is combined with substrate layer of wood, and the moisture that it also avoid in substrate is heated the bubbling that causes of volatilizing, and template quality is good.
Detailed description of the invention
Embodiment 1:
The present embodiment comprises the steps:
1) substrate rolls cave: select wide 1.22 meters, long 2.44 meters 5 layers of wooden plywood, utilize roller sting machine on substrate two sides respectively ecto-entad roll thorn depression, depression is the little uncovered shape of outer imperial palace, and depression is uniformly distributed on plate face, adjacent depression Edge Distance is 15 millimeters, and pocket depth is 1 millimeter.
2) preheating dehumidifying: utilizing infrared electric-heating device to toast rolling the substrate surface behind cave, making its surface temperature be increased to rapidly 100 degree, dispel substrate shallow top layer moisture.
3) extrude to cover and mould: plastics surface layer adopts polyethylene, the substrate surface after utilizing plastic extruder to be expressed into preheating, and spread out as far as possible and be distributed in substrate surface.
4) roll-in compound: substrate limit is extruded to cover and moulded, lateral dominance pressure roller is moulded surface along substrate one end carry out roll-in to being covered, partial melting plastics are clamp-oned in depression fast, formed with the surface of substrate and pocket interiors bottom plastics surface layer and be connected closely, after roll-in, plastic layer smooth outer surface is smooth, and plastic layer is 0.5 millimeter.
5) cooling curing: utilize blower fan to carry out air cooling to the sheet material after roll-in compound.
6) shaping is cut: use guillotine to carry out deburring to sheet material after cooling by specification and cut.
The present embodiment adopts extrusion molding hot pressing One-step production to mould wooden composite shuttering, it is protruding that plastics surface layer bottom even is provided with the root shape stretched in substrate depression, the protruding base portion of root shape is connected with plastics surface layer, the protruding periphery of root shape is connected with substrates into intimate, plastics surface layer and substrate achieve seamless directly connecting, in conjunction with secure rigid.Substrate is moulded roll-in can also eliminate because of the concavo-convex problem in plate face brought of substrate injustice through being covered, and total quality is good.Randomly draw the template made of said method, directly apply to pouring concrete after the gluing of side, detect after reusing 35 times, do not occur that plastics surface layer and substrate depart from and the phenomenon of surface layer bubbling.Namely this template can be used for cast after completing, the template that more existing bonding method makes, and eliminates adhesive material congealing step, can shorten the resting period, save production cost.
Embodiment 2:
The present embodiment comprises the steps:
1) substrate rolls cave: the 7 layers of wooden plywood selecting wide 0.915 meter, long 1.83 meters, utilize roller sting machine on substrate two sides respectively ecto-entad roll thorn depression, depression is uniformly distributed on plate face, and adjacent depression Edge Distance is 12 millimeters, and the degree of depth is 1.5 millimeters.
2) preheating dehumidifying: utilizing electric hot plate to toast rolling the substrate surface behind cave, making its surface temperature be increased to rapidly 180 degree, substrate shallow top layer moisture rapid evaporation.
3) extrude to cover and mould: plastics surface layer adopts polypropylene, the substrate surface after utilizing plastic extruder to be expressed into preheating, and stand is distributed in substrate surface.
4) roll-in compound: substrate limit is extruded to cover and moulded, lateral dominance pressure roller is moulded surface carry out roll-in to being covered, and partial melting plastics is clamp-oned in depression fast, is formed be connected closely bottom plastic layer with the surface of substrate and pocket interiors, plastic layer external surface is smooth, and plastic layer is 0.2 millimeter.
5) cooling curing: utilize blower fan to carry out air cooling to the sheet material after roll-in compound.
6) shaping is cut: use guillotine to carry out deburring to sheet material after cooling by specification and cut.
Embodiment 3:
In the present embodiment, production stage is identical with embodiment 1, and its difference is:
Wide 1.22 meters, long 2.44 meters 9 layers of bamboo plywood selected by substrate, and adjacent depression Edge Distance is 22 millimeters, and the degree of depth is 2 millimeters.During preheating dehumidifying, substrate surface temperature is increased to rapidly 260 degree.Plastics surface layer adopts polyvinyl chloride, and adds the inserts such as a certain amount of wood powder or precipitated calcium carbonate.Plastic cover layer thickness is 0.5 millimeter.
The adhesive type of the template of above-mentioned making and existing use is selected to mould each one piece of the construction formwork of wooden compound, put into water and carry out poach experiment, after boiling 11 hours continuously, adhesive type is moulded wooden complex architectural template plastics surface layer edge and is occurred cracking and bubbling phenomenon, and the template plastic surface layer adopting the present embodiment method to make is combined with substrate closely, also not there is bubbling.
Embodiment 4:
In the present embodiment, production stage is identical with embodiment 1, and its difference is:
Wide 1.22 meters, long 2.44 meters 9 layers of bamboo plywood selected by substrate, and adjacent depression Edge Distance is 25 millimeters, and the degree of depth is 3 millimeters.During preheating dehumidifying, substrate surface temperature is increased to rapidly 280 degree.Plastics surface layer adopts polyethylene and polypropylene mixed plastic.
Embodiment 5:
In the present embodiment, production stage is identical with embodiment 1, and its difference is:
Wide 1.22 meters, long 2.44 meters 11 layers of bamboo plywood selected by substrate, and the spacing of depression on plate face is 5 millimeters, and the degree of depth is 4 millimeters.During preheating dehumidifying, substrate surface temperature is increased to rapidly 320 degree.Plastics surface layer adopts the heat of mixing thermoplastic plastic of secondary recovery.
Substrate of the present invention can use wooden plywood, the bamboo plywood of different-thickness, and its depression density and the degree of depth regulate at any time according to substrate thickness and requirement of strength, and depression is too close to be damaged substrate top layer, affects formwork integral intensity; Depression is too sparse, top layer and the substrate degree of cross linking little, in conjunction with loosely.The shape of depression is also related to the bond strength of plastics surface layer and substrate, its shape is the little uncovered shape of outer imperial palace, the lamina rara externa that its degree of depth just penetrates veneer is optimal selection, root bottom such plastics surface layer is convex is deep into below lamina rara externa, with the interlayer bonding strength of a few laminate in reinforcement plate surface.During preheating dehumidifying, substrate heats through quick high-temp, and its surface temperature raises rapidly, is conducive to dispelling substrate top layer moisture, and the temperature of heating can be done wet according to substrate and adjust at any time season.Plastics surface layer materials are not the contents of application claims protection, and it according to user's request, season and can adjust component formula and additive from different places flexibly.
Claims (2)
1. a production method for Durable waterproof building template with plastic surface, is characterized in that comprising the steps:
1) substrate rolls cave: on substrate two sides by certain density respectively ecto-entad roll thorn depression, the degree of depth of described depression is 1 to 4 millimeter, and depression is uniformly distributed on plate face, and its adjacent depression Edge Distance is 5 to 25 millimeters;
2) preheating dehumidifying: toast rolling the substrate surface behind cave, substrate skin temperature is raised rapidly, dispel substrate shallow top layer moisture;
3) extrude to cover and mould: utilize plastic extruder extrusioning thermoplastic plastic, molten plastic is overlying on the substrate surface after preheating, after basal plate preheating, plate surface temperature is 100 to 320 degree;
4) roll-in compound: utilize pressure roller to mould surface carry out roll-in to covering, partial melting plastics are clamp-oned in depression, make bottom plastics surface layer with the surface of substrate and depression inwall close proximity, plastics surface layer external surface is smooth;
5) cooling curing: the sheet material after roll-in compound is cooled;
6) shaping is cut: sheet material after cooling is cut by specification.
2., according to the production method of Durable waterproof building template with plastic surface according to claim 1, it is characterized in that described substrate adopts multi-plywood, pocket depth is 1.5 to 2 millimeters; After basal plate preheating, its plate surface temperature is 180 to 220 degree; Described thermoplastic is one or more the mixed plastic in polyethylene, polypropylene, polyvinyl chloride, is also added with filler for plastic in surface layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210354370.6A CN102877641B (en) | 2012-09-22 | 2012-09-22 | Production method for durable plastic surface waterproof building template |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210354370.6A CN102877641B (en) | 2012-09-22 | 2012-09-22 | Production method for durable plastic surface waterproof building template |
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| CN102877641A CN102877641A (en) | 2013-01-16 |
| CN102877641B true CN102877641B (en) | 2015-03-18 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538427A (en) * | 2016-01-19 | 2016-05-04 | 刘琦 | Surface treatment method for clean water plastic surface artificial board |
| CN106182213A (en) * | 2016-08-22 | 2016-12-07 | 益阳桃花江竹业发展有限公司 | A kind of production method of building concrete Bamboo Formwork |
| CN106639296B (en) * | 2016-11-24 | 2018-09-25 | 广州昱辰元创节能环保科技有限公司 | A kind of production method of the modeling face building lumps of wood |
| CN107521063A (en) * | 2017-09-29 | 2017-12-29 | 邳州市华龙木业有限公司 | A kind of production equipment of modeling face building template |
| CN111890748A (en) * | 2020-08-13 | 2020-11-06 | 潍坊荣雅木业有限公司 | Flame-retardant plastic-surface building template and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA966972A (en) * | 1974-01-08 | 1975-05-06 | Du Pont Of Canada Limited | Coated panel |
| JPS59164138A (en) * | 1983-03-09 | 1984-09-17 | 東亜燃料工業株式会社 | Manufacture of board for formwork |
| CN200942614Y (en) * | 2006-06-02 | 2007-09-05 | 张博 | Plastic wood composite sheet with reinforcing mat |
| CN201201350Y (en) * | 2008-03-29 | 2009-03-04 | 张博 | Plastic wood composite panel |
| JP4919102B2 (en) * | 2008-11-17 | 2012-04-18 | 本田技研工業株式会社 | Cooling structure for power supply unit for vehicle |
| CN201981777U (en) * | 2011-03-17 | 2011-09-21 | 潍坊科兴塑料建材有限公司 | Plastic-wood building template |
| CN202248849U (en) * | 2011-09-17 | 2012-05-30 | 潍坊科兴塑料建材有限公司 | Durable waterproof building template with plastic surface |
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