Foshan Shunxin Ceramics provides the basic knowledge of ceramics. Foshan Shunxin Ceramics provides the basic knowledge of ceramics.
1. According to the purpose:
(1) Interior wall brick: glazed ceramics with water absorption rate >10%, <21%, used for interior wall decoration (2) exterior wall brick: water absorption rate <10%, enamel brick used for exterior wall decoration The above bricks include glazed mosaic, glazed exterior wall tiles, porcelain exterior wall tiles, polished exterior wall tiles, and external wall hanging tiles;
(3) Floor tiles: glazed tiles, porcelain tiles, polished tiles, antique bricks, square tiles, crystal tiles, etc.
2, according to the molding method:
(1) extruded brick: McDonald's brick (open brick), Siwa, glazed tile;
(2) Dry pressed bricks: today's wall tiles;
(3) Wet pressed bricks, rolled bricks, and cast bricks.
3, by material:
(1) Vitrified brick (porcelain brick): It is used for the unglazed brick with water absorption rate of ≤0.5% for building wall and floor decoration. Standard: GB/T4100.1-1999
(2) 炻 tiles: 0.5%-3% Applicable standards: GB/T4100.2-1999
(3) Fine brick: 3%-6% Applicable standards: GB/T4100.3-1999
(4) Tantalum brick: 6%-10% Applicable standard: GB/T4100.4-1999
(5) Ceramic tile: >10% Applicable standards: GB/T4100.5-1999
Second, the key requirements of GB/T4100.1-1999:
1. Appearance size: including nominal size, working size, actual size, thickness size;
2, size deviation: edge straightness, straight angle, flatness
3. Appearance standard: The defect standard (visual standard) is also called the surface quality defect standard. The national standard stated that "at least 95% of the bricks have no obvious defects in the vertical observation surface at a distance of 0.8 meters."
4, physical properties:
Water absorption, breaking strength, modulus of rupture, thermal shock resistance, glaze resistance (glaze),
Frost resistance, gloss (throwing), abrasion resistance (blank) (glaze), impact resistance,
Thermal expansion, small chromatic aberration, slip resistance, radioactivity
5. Chemical properties:
Low concentration of acid and alkali corrosion, high concentration of alkali corrosion, household reagents and swimming pool corrosion,
Antifouling property (blank) (glaze), lead and cadmium dissolution amount IV, pressing:
There are two types of molds for automatic presses: inserting and cover molding. The feature of the insert is that the lower mold frame is fixed, the upper mold core directly enters the mold cavity, and the lower mold completes the loading and discharging operations. The cover mold is characterized in that the lower mold frame can be moved up and down, and the upper core is larger than the lower mold cavity. During the pressing process, the upper core is pressed to form a powder. Use this product for products that face up, such as large particles. The quality of the inserted product is good, but the life of the mold is relatively short. Most manufacturers choose this method because of the high precision of the mold insertion.
During molding, the powder falls from the intermediate hopper of the top of the press and is fed into the cavity through the feeding cart. The upper core descends into the cavity to press the powder. The upper core is then slightly lifted for venting, and then the upper die is progressively pressed down to achieve sufficient flexural strength and good density of the green body. The final stage of the pressing process, including the lifting action of the upper core and the associated demoulding and blanking action, the pressed green body is sent out of the mold, and at the same time refilling, completing a pressing cycle process. The original text is from Foshan Shunxin ceramics. Ming http://?id=120http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
