Woodworking furniture, in life is also an indispensable product. And woodworking furniture grinding is also very waste of time and effort, the current woodworking furniture industry, the main means of grinding, divided into manual grinding and machine grinding two kinds. And one of the manual grinding than machine grinding precision, the disadvantage is slow.
Manual sanding: In addition to studying the experience of craftsmen, but also need craftsmen have very good patience, because each sanding point, need to go through repeated sanding.
Machine sanding: fast, low cost, the machine set the specification, can quickly sand out the established size, but the biggest disadvantage of machine sanding is easy to damage the material.
So many factories are using manual and machine at the same time, the machine roughly polished and then use manual fine sanding. Handmade furniture polished out of the product, every detail is handled very well, there is no unnecessary burrs, no terrier corners, touch are smooth and smooth, which is also the charm of handmade furniture.
As the saying goes, “three parts carving, seven parts grinding”, if the carving is to portray the image of the pattern, then polishing is to make the image more vivid, smooth and delicate. If there is no polishing, the finished product is just a rough outline. Polishing is very important to improve the brightness of the furniture, smoothness.
Furniture production process by process: log cutting, drying plates, carpentry process, carving process, sanding process, assembly process, waxing process.
First, after the purchase of logs, many furniture factories are sent to a specialized sawmill, professional processing into the corresponding specifications of the plate.
Second, drying plate is because of solid wood furniture parts are made of solid wood, wood moisture is related to the adaptability of furniture to seasonal changes.
Third, the carpentry process is the formal processing of wood, processed into a variety of shapes needed.
Fourth, carving, is in the process of good wood surface carving a variety of patterns and styles.
Fifth, after the carving is sanding process, the previous process, only the need for experienced craftsmen, the time is still very fast, but the sanding process, not only affects the finished product of the material aesthetic effect, but also related to the quality of the finished product.
Six, polished assembly, is to put the various parts assembled, also does not require much technical content.
Seven, waxing, that is, painting, different places, some places called different. Finally painted, also has these small processes white stubble surface treatment, brush primer, plug putty, sanding and polishing , spray top coat.
The above is the production process of home solid wood furniture. We are mainly for the sanding process to explain.
I. Tools
1, angle grinder – mainly because it can be used with a variety of abrasives, materials for cutting, trimming, modeling, grinding, polishing.
Abrasives can generally be used: cutting blade, a variety of shaped ceramic grinding head, with handle millipede wheel, wool felt wheel, wire brush and so on.
2, belt sander – woodworking with more shapes of belt sander, such as multi-function belt sander, tank belt sander and general-purpose belt sander.
Abrasives that can be used with: sanding belts, divided into red grit, white grit, black grit, the substrate is generally paper-based, cloth-based or soft cloth-based.
Multi-functional belt sander front flat belt is used to sand strip plane, side round sand can be used to sand beveled surfaces and so on. Tank belt sander is mostly used to sand larger plate plane.
3. Sander (round, square, triangular)
Sander is mostly used for finishing and polishing. The sanding disk of the sander can be changed in shape according to the need to cope with various situations.
The sander can be used with abrasives: sandpaper of the same shape or wool balls for polishing.
Second, abrasive
Woodworking furniture sanding with abrasives, usually handmade sandpaper, semi-handmade sanding belts, in the furniture industry, sandpaper is also called sandpaper, commonly used mesh from 60 mesh to 2,000 mesh ranging from the need to look at the material and sanding fineness of the choice, but usually start from the thickest slowly become thin.
For example:
Solid wood white embryo sanding 180#, 240#
Plywood or a primer sanding 220#, 240#.
Leveling primer 320#, 400#.
Final primer or top coat 600#, 800#.
Topcoat polishing 1500#, 2000#
Sanding methods include dry sanding, water sanding, oil sanding, wax sanding and toothpaste polishing. Dry grinding is divided into coarse grinding, flat grinding and fine grinding, of which coarse grinding is generally used in pre-treatment to remove wood blanks of wood hair, scars, glue marks and pencil marks and other dirt, and flat grinding is usually wrapped with a small block of wood or hard rubber cloth, sandpaper, sandpaper on the large plane for sanding, so that the leveling effect is better, fine grinding is generally used for scraping putty, on the closed coat of paint, spelling color and make-up color after the various channels of the middle layer of the process, the sanding requirements carefully and seriously. Sanding is required to be careful and serious. Water grinding is to use water sandpaper dipped in water (or soapy water) sanding. Water grinding can reduce abrasion marks, improve the smoothness of the coating, and save energy, save sandpaper.
Third, polishing
Furniture painting process includes white stubble surface treatment, brush primer, plug putty, sanding and polishing, spray top coat.
Specific as follows:
1, white stubble surface treatment need to oil finish the surface of woodwork (veneer sealed over a primer) such as dust, stains, glue stains, pencil paths, etc. must be dealt with, steam nail cap exposed on the surface to be flushed into the surface of the woodwork.
2, brush the primer should pay attention to the primer concentration when brushing primer.
Brush along the wood grain from top to bottom, from left to right uniformly painted two times, painting to avoid piles of oil hanging, the primer requires more than four brushes (excluding sealer).
3, plug putty primer brushed once on the steam nail holes, splices and other plug putty, putty modulation is based on the decorative panel color by Lide Powder, water pigment mixing and become, putty when asked to putty coated full and highlight the surface of the wood, as a drying contraction of the sanding margin.
4, sanding and sanding to be putty dry, with 360 water sandpaper for sanding and sanding, the operation should be force uniformity, shall not be ground to reveal the bottom, the corners of the sun should pay special attention to, such as ground to reveal the bottom, should be promptly adjusted to the color of the repair.
5, spray top coat to do a good job of wall protection, top coat after spraying, the paint film surface should be flat and smooth, soft touch, consistent color, no hanging, no wrinkles.