Introduction: Glass containers are widely used in the field of daily chemicals. The frosting and sandblasting processes are used to make the surface of the glass container obscured, so that the glass container has the characteristics of obscurity and non-slip, which is liked by consumers. This article shares relevant knowledge about glass sandblasting and frosting, and the content is for your reference:
Glass is formed by quartz sand, limestone, feldspar, soda ash, clarifier, coloring agent/decoloring agent, flux, cullet, etc. The raw materials are melted at 1550～1600℃, forming, annealing, and cutting. Colorless (white glass) transparent amorphous inorganic substance.
The chemical composition of glass: the main component SiO2, the content is about 72%, the Na2O content is about 15%, the CaO content is about 9%, a small amount of AL2O3, MgO, etc.
It has a series of very valuable properties: transparent, hard, good corrosion resistance, heat resistance, electrical and optical properties; it can be made into products of various shapes and sizes by a variety of molding and processing methods; it can be changed by adjusting the chemical composition Nature to adapt to different usage requirements. Especially the raw materials are abundant and the price is low.
A conventional abrasive jet, the technology has been continuously developed, improved and improved. With its unique processing mechanism and wide range of processing and application, it has become more and more popular in today’s surface treatment industry and has been widely used Machinery manufacturing, instrumentation, medical equipment, electronic appliances, textile machinery, printing and dyeing machinery, chemical machinery, food machinery, tools, cutting tools, measuring tools, molds, glass, ceramics, handicrafts, machinery repairs and many other fields.
It refers to the jet formed by the abrasive material moving at high speed under the action of some external power. For dry sandblasting, the external power is compressed air; for liquid sandblasting, the external power is the mixing action of compressed air and the grinding fluid pump.
It uses the high-speed airflow formed when high-pressure air passes through the pores of the nozzle to blow fine-grained quartz sand or emery on the surface of the glass, so that the surface of the glass is continuously damaged by the impact of sand particles, forming a matte sandblasted surface The structure of the sand is determined by the airflow speed, the hardness of the sand, especially the shape and size of the sand. The fine sand makes the surface form a fine structure, and the coarse sand can increase the speed of the sandblasted surface being eroded.
Refers to the medium used in the jet process, which can be river sand, sea sand, quartz sand, corundum sand, resin sand, steel sand, glass shot, ceramic shot, steel shot, stainless steel shot, walnut skin, corn cob, etc. Different materials and particle sizes can be selected according to different sandblasting process requirements.
Clean up the oxide scale, residual salt, welding slag and surface residue on the surface of various workpieces.
Clean up tiny burrs on the surface of various workpieces.
It is used for the pretreatment and processing of the surface of the workpiece before coating and plating to improve the adhesion of the coating and plating.
It is used to improve the performance of mechanical parts, improve the lubrication conditions of mating parts, and reduce the noise of mechanical operation.
Used for surface strengthening treatment to eliminate stress and improve the fatigue strength and corrosion resistance of parts.
Used for the refurbishment of old parts and the repair of non-conforming products.
It is used for cleaning rubber, plastic, glass and other molds without damaging the mold surface, ensuring mold accuracy, improving product quality, and improving mold life.
Finish processing, remove scratches and processing marks on the parts, and obtain a uniform non-reflective surface effect.
Obtain special sandblasting effects, such as sandblasting lettering (painting), sand washing jeans, frosted glass, etc.
The frosting treatment in chemistry is to mechanically grind or manually grind the glass with abrasives such as emery, silica sand, pomegranate powder, etc., to make a uniform and rough surface, or use hydrofluoric acid solution to process the surface of glass and other objects. Products become frosted glass and other products. The airtight performance is better after frosting.
It refers to the process of processing the original smooth surface of ordinary glass to change its surface texture from smooth to rough (transparent to opaque). One or both sides of the flat glass are mechanically ground or manually ground with abrasives such as emery, silica sand, pomegranate powder, etc. to make a uniform and rough surface. The glass surface can also be processed with hydrofluoric acid solution, and the resulting product becomes frosted glass. The surface of the frosted glass is processed into a rough surface, which diffuses the penetrating light, and has the advantage of light transmission and opacity.
Both frosting and sandblasting are used to obscure the glass surface, so that the light will diffuse uniformly after passing through the lampshade. It is difficult for ordinary users to distinguish between the two processes. The following describes the production methods of the two processes and how to identify them. .
Frosting process: Frosting refers to immersing the glass in a prepared acidic liquid (or applying an acid paste) to corrode the glass surface with strong acid. At the same time, the ammonium hydrogen fluoride in the strong acid solution makes the glass surface crystals. Therefore, if the frosting process is done well, the surface of the frosted glass is extremely smooth, and the hazy effect is caused by the scattering of crystals. If the surface is rough, it means that the acid is corroding the glass more seriously, which is an indication of the immature craftsmanship of the frosting master. Or some parts still have no crystals (commonly known as not sanded, or the glass has mottling), which is also due to the master’s poor control of the craft. This process is technically difficult. The best performance of this process is the appearance of sparkling crystals on the surface of the glass, which are formed under a critical condition, and the main reason is that the hydrogen fluoride ammonia has reached the time when the fast sales are exhausted.
Sandblasting process: This process is very common. It uses sand particles emitted by a spray gun at high speed to hit the surface of the glass to form a fine concave-convex surface to achieve the effect of scattering light and make the light pass through a hazy feeling. The surface of the sandblasted glass product has a rough hand feel. The glass surface is damaged, so the transparent glass seems to be white. The process difficulty is average.
Frosted glass has a strong texture, but the pattern is limited; sandblasted glass is first carved with paper and then sprayed out the pattern according to the requirements. In this way, any pattern you want can be frosted than sandblasted The surface graininess should be more delicate.
The two processes are completely different processes. Frosted glass is more expensive than sandblasted glass, and the effect is mainly based on the needs of users. Some unique glass is not suitable for frosting. From the perspective of pursuing nobility, matte should be used. The sandblasting process can generally be done in factories, but it is not easy to do the sandblasting process really well.