Do plastic formwork need to be sanded? Can you use sandpaper to smooth plastic sheets?

1.The adhesion between the plastic template and the concrete is very low, and it is not easy to stick to the mold.

2.The plastic formwork adopts a one-time molding and pouring process, which does not need to be polished.

The splicing of plastic building formwork should meet the following requirements:

1.The seams of the formwork should be tight and smooth, and there should be no misalignment;

2.Flat formwork joints should be located on a wood-steel frame. In other cases, tape should be used to seal the gaps, and the construction personnel should strictly enforce them;

3.The direction of the hollow plastic formwork through hole should be perpendicular to the horizontal plane, and sealing measures should be taken, and the through hole should be closed with tape to prevent the cement slurry from seeping into the hole from the joint.

4.When using formwork for planar structures such as floor slabs and beam formwork, hollow plastic formwork is used in combination with wood-steel frames, and the distance between internal corrugated wood-steel frames should not exceed 200mm.

1. At first glance, the landlord has never used the plastic formwork, and the plastic has a tall name: polymer, the hydrophobicity of the polymer itself is very high, and the water content of the concrete is very high before solidification, which directly determines that the concrete will not adhere to the plastic, and it is easier to remove the mold. However, in the actual use of the plastic formwork, the surface of the formwork will be mechanically damaged due to man-made reasons, which destroys the structure of the polymer, and the alienation of the polymer and water does not exist, and the adhesion of concrete and the formwork will naturally occur.

2. The mechanical grinding that the landlord said is absolutely undesirable, because it will damage the polymer structure, and this damage is undesirable.

3. The best way for the landlord is to take care of it as much as possible in the process of using the plastic formwork, of course, the landlord does not need to worry, now the plastic template has derived a lot of new products, such as new plastic templates, plastic steel templates, etc., which are lightweight, strong and durable.

Hope this helps.

OK. The following points should be paid attention to when sanding: white blanks that have not been coated with any paint, plain wood, furniture, musical instruments, handicrafts, etc., should be wiped with a damp cloth before sanding, and after the water is dry, use No. 1 sandpaper to sand along the wood grain (note that it must follow the wood grain); Where the wood is not flat enough, you can use sandpaper wrapped in small wooden blocks or hard eraser to sand, and do not grind vertically and horizontally when sanding.

Otherwise, the wood grain will break, and the painted furniture will leave permanent flaws; When polishing the edges and corners, pay attention to light grinding, the edges and corners can not collapse, and be sure to maintain the original round or square outline. The decorative line must be kept straight, not bent, broken, or deformed; Grinding should be brushed while grinding, because the wood sandpaper sand particles are easy to fall off, and there is a possibility of grinding the wood grain after rubbing the surface of the object.

In addition, the dust from sanding is easy to embed in the bristles, so it is necessary to brush off the dust with a dry brush at any time during sanding, brushing while grinding until the surface is flat and smooth; When grinding the surface of the thicker putty, it is necessary to adhere to the principle of "taking the high as the standard and smoothing it with a plate".

Do not grind blindly; The closer to the surface of the paint layer, the higher the quality requirements, the finer the sandpaper used for sanding should be, and sometimes the old water sandpaper can be used for sanding, which is economical and does not hurt the paint film.

The first rule of sanding is to follow the grain of the wood, because if you sand against the grain, it will leave obvious permanent scratches. The second rule is to use grinding blocks, because without grinding blocks, even grinding strength cannot be guaranteed.

For flat surfaces, the grinding block should be cushioned. Grinding blocks without padding are not elastic, so the sand particles on the sandpaper can scratch the surface of the wood during the sanding process. For curved surfaces, your best bet is a thick foam pad or sponge with sandpaper.

These fillings change their shape according to the curvature of the wood, resulting in a stable and uniform sanding force.

Yes, first use coarse sandpaper, then fine sandpaper, and then water sand, so that it can be smooth, and finally polish it with some wax.

According to different grinding substances, there are many kinds of emery paper, artificial emery paper, glass sandpaper, etc. Dry sandpaper (wood sandpaper) is used to polish the surface of wood and bamboo. Water-resistant sandpaper (water sandpaper) is used to polish the surface of metallic or non-metallic workpieces in water or oil.

Water frosted paper. The texture is relatively fine, and the water frosted paper is suitable for grinding some things with a more delicate texture, and is suitable for post-processing;

The gap between the sand grains of the water sandpaper is smaller, and the grinding of the broken is also smaller, and the broken dust will flow out with the water when used with water, so it should be used with water, if the water sandpaper is dry grinded, the broken will remain in the gap of the sand particles, so that the surface of the sandpaper will be brightened, so that it can not achieve its original effect, and the dry sandpaper is not so troublesome, the gap between its sand particles is larger, and the grinding of the broken dust is also larger, and it will fall down in the process of grinding due to the large gap, so it does not need to be used with water.

Tried, but no. If you grind it, it will become frosted. Do you like this style?

It can be coarsely sanded and then finely sanded by sponge sandpaper sponge wheel.

First, the advantages of plastic building formwork are:

1. Smooth and clean. The formwork splicing is tight and smooth, and the surface and finish of the concrete structure after demoulding exceed the technical requirements of the existing clear water formwork, and there is no need for secondary plastering, saving labor and materials.

2. Light and easy to install. Light weight, strong process adaptability, can saw, planing, drilling, nailing, can be composed of any geometric shape at will, to meet the needs of various shapes of building formwork.

3. Easy demoulding. The concrete does not stick to the surface of the board, no release agent is required, easy to release the mold, and easy to clean the ash.

4. Stable and weather-resistant. High mechanical strength, under the temperature of -20 to +60, no shrinkage, no swelling, no cracking, no deformation, dimensional stability, alkali resistance, anti-corrosion, flame retardant and waterproof, rat and insect resistance.

5. It is conducive to maintenance. The formwork does not absorb water and does not require special maintenance or storage.

Second, as far as I know, the shortcomings are:

1: The mass is too heavy.

2. The intensity is not very satisfactory.

3. It's a bit of a trick.

The reuse rate is higher than that of wooden boards, because the middle is empty, the first use is filled with mortar, the second use is very troublesome, and the second cutting is even more difficult......

I've already had 168,000 yuan! You can find a manufacturer to see if it asks you to pay 168,000 to send you 168,000 and then there are 336,000 goods, and when you rent a storefront to deliver the goods, it will change! Routines are routines.

The longitudinal side of the board of Yiyuan has trimming without cement.

Plastic template joining, well, it's all a lie, I was deceived in Suqian, Jiangsu, and I'm playing word games, don't sign a contract, or a listed company,

The main advantages are:

1. The surface is smooth and smooth, high strength, labor-saving, material-saving, can meet the requirements of fair-faced concrete formwork, there is no need to clean the surface of the formwork after defilming, thereby saving a lot of labor, the flatness of the formwork can be controlled within, the thickness is uniform, the thickness can be controlled within, and the iron nails of 2 3 are saved than wood plywood.

2. Good water resistance, strong toughness, long-term immersion without stratification, water absorption and expansion rate is less than, can be used normally in the range of -30 + 60, the aging degree of 6 years is 15, and can be used normally for more than 8 years.

3. Strong plasticity, according to the design and component size requirements, processing and making templates of different shapes and different specifications, the production of radian component templates is simpler, the template can be drilled nails, saws, planers, etc., with the same machinability as the wood template, and the on-site splicing is simple and convenient.

4. It can be used repeatedly, and the plastic template can be used to a certain extent, regardless of the size of the new or old, after treatment, a new template can be produced.

Therefore, plastic formwork will become an ideal building formwork product in China's construction in the 21st century.

The effect is not good, the vibrating rod is a dozen commercial concrete directly a hole, and the quality is not good.

We have a plastic template produced in Xinxiang area is very good, the effect is not to say, the advantages are high turnover rate, smooth surface, no moisture absorption, no mildew, acid and alkali resistance, no cracking, sawing, nailing, can be processed into any length, etc. The downside is that it's a bit heavy.

Let's not talk about the good places of plastic building formwork, let's talk about the shortcomings, 1: the quality is too heavy, 2 the strength is not very satisfactory, 3, a bit costly.

Hello, is this a construction unit or a company? I'm also interested in this plastic template now, and if you can, talk more thank you

The use rate of plastic formwork is still very high, I will introduce you to one, Dalian Hongde formwork, our home construction site is using their products, and it can also be used.

There are many types of plastic formwork, from the material.

Qualitatively, it is divided into PVC foaming, PP modification, glass fiber tempered formwork and other types, and is divided into hollow plastic formwork, ribbed plastic formwork and flat plastic formwork in shape. At present, the service life of domestic construction wood plywood is generally short, and the use effect is very poor or directly scrapped after 6-8 times; The turnover times of plastic formwork are much more, especially the Lehua Xinyuan glass fiber tempered formwork imported from South Korea, which can be used more than 80 times. Considering the whole life cycle of the formwork, the plastic formwork should be more economical; From the perspective of amortization of a single project, wood plywood is more economical due to the limited number of times plastic formwork can be used in a single project.

The main advantages of glass fiber tempered plastic formwork include:

Light - per square meter, lighter than wood plywood;

Translucent - semi-translucent;

Strong - elastic modulus of more than 8000 MPa;

More - more than 80 turnovers;

Easy – easy to remove the mold.

It is in use, and it is badly deformed in summer.

Jiangsu Keyue New Materials****.

Under the condition of -20 to +60 temperature, it does not shrink, does not swell and closes the rubber, does not crack, does not deform, is dimensionally stable, alkali-resistant, anti-corrosion, flame retardant and waterproof, repels rodents and insects, does not absorb water, and does not need special maintenance or storage. The use of concrete such as plastic formwork does not stick to the board surface, no need for release agent, easy to demold, easy to clean ash.

We just used the plastic template of Shaanxi Huayang New Materials, and we do not use release agents, and the effect is also very good.

Yes, this is a necessary process for steel formwork or aluminum formwork.

Wood formwork repair is a must.

1. Electrolytic polishing.

It is basically the same as chemical polishing, that is, it selectively dissolves the tiny protrusions on the surface of the material to make the surface smooth. Compared with chemical polishing, the effect of cathodic reaction can be eliminated, and the effect is better. The electrochemical polishing process is a two-step process:

The macroscopic leveling dissolution product diffused into the electrolyte, and the geometric roughness of the material surface decreased, and the Ra > 1 m. The microlight is anodic polarized, and the surface brightness is increased, and the Ra < 1 m.

2. Ultrasonic polishing.

The workpiece is placed in the abrasive suspension and placed together in the ultrasonic field, relying on the vibration of the ultrasonic wave to make the abrasive grind and polish on the surface of the workpiece. The macroscopic force of ultrasonic machining is small and will not cause deformation of the workpiece, but it is difficult to make and install tooling.

Ultrasonic machining can be combined with chemical or electrochemical methods. On the basis of solution corrosion and electrolysis, ultrasonic vibration is applied to stir the solution to detach the dissolved products on the surface of the workpiece, and the corrosion or electrolyte near the surface is uniform; The cavitation effect of ultrasonic waves in liquids also inhibits the corrosion process and facilitates surface brightening.

You can use fine sand to polish the finer the better, and if the marks are relatively large, scrape a layer of putty where you are damaged, and then spray paint it, and only you can fix it, try it.

Don't! If you polish the plastic, it will prick! Squirting out is not smooth. The best way is to spray it thinly, spray it again after it is dry, spray it a few more times, and it's good. One-time spray, easy to flow, streaks after drying.

Yes, the plastic surface is relatively smooth, and it is easy to peel off the paint without sanding.

This auspicious kind of situation does exist. The reason is that the plastic building template is obviously weaker than the wooden building template in the convenience of cutting and fixing, and in the process of disassembly, due to the brittleness of the plastic, it is also easy to break, and the cost of the plastic template is too high, so each construction site is generally willing to use the wooden building template. If you want to improve the number of uses of wooden building templates, that is, cost-effective, it is recommended that you choose the top 30 building templates within the old sales enterprises, such as Dadi, Jinheng, Earl and other brands of building templates The quality of building templates is relatively excellent, and the cost performance is also higher.

Hope it helps!

1 The rotational speed of the polisher should be high.

2 Use a polishing wheel with a small diameter and very supple, such as a real silk polishing wheel3 Use the finest particle size of the polishing paste, such as a good brand of green polishing paste (commonly known as green oil) 4 Choose an experienced polisher with good operation skills, polishing points: the force should be small, and the temperature should not be high.

Why are you grinding it? The more you grind, the more ugly it becomes.