Porcelain preparation
The enamel is a glassy silicate or borosilicate coating applied to a metal body. Porcelain glazes consist of seven components, each with a different role. The matrix agents are predominant, most of which are silicates, boron oxide, aluminum oxides and alkali metal oxides. The chemical composition of the enamel is determined according to the type of the blank material and the performance of the product. It is required to accurately weigh and mix thoroughly (dry mixing, can also add 5 to 15% water, and make small balls), and melt it in the tank kiln (China multi-purpose muffle kiln), kiln or rotary kiln Uniformity, water-quenched, air-cooled or hot pressed into flakes (0.6 ~ 1.5mm), and then ground (using a ball mill or airflow mill) into a dry glaze powder or water to make a glaze slurry.
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The glaze powder or the glaze slurry is evenly coated on the metal blank, and the glaze is applied after firing. The coating method includes dipping, pouring, spraying, powdering, and the like. The powdering method is to spray dry glaze powder on the hot bottom glaze, so that the coating and baking are combined into one operation, and it is also a necessary method for the large cast iron (bath, reaction pot, etc.). In addition, there are electrostatic powder coating and electrophoresis coating.
Product firing
The enamel-coated blank is fired in a box furnace, a rotary table furnace or a tunnel furnace. The borosilicate glaze containing the adhesion agent has a firing temperature of about 880 to 930 ° C, so that it can form an iron oxide layer on the surface of the green body, which is advantageous for the porcelain layer to be in close contact with the green body (steel material), so it is necessary to adopt Oxidizing atmosphere. The glaze firing temperature is slightly lower, the enamel glaze with turbid milk color is 850-900 ° C, and the titanium glaze is 820-860 ° C. In order to make the glaze with good opacity and vivid color and tightly combined with the bottom glaze, the firing time and the atmosphere in the furnace should be strictly controlled. If the cast iron body is made of enamel glaze and titanium glaze, it is especially sensitive to the atmosphere.
Our withdrawing wire tool can be used
in cooperation with the conductor gripper to tighten the conducting wire. Our
product is designed with the friction structure,whcin is flexible and reliable
to turn.
And
our steel double hook turnbuckle plays a role in
tightening the Steel Wire Rope, stranded steel wire, and some others. This
product from 14113 to 14116 can be also provided with the ring structure, which
must be clearly indicated in the contract. And the ratchet tackle block is always found in the line
construction. It serves to tighten up the stranded steel wire, and aluminum
stranded conductor, among others. The telescopic length reached 1 m.
Ratchet Withdrawing Wire Tool,Cable Ratchet Tightener, Cable Tightener Rigging, Cable Turnbuckle Hardwares
NINGBO MARSHINE POWER TECHNOLOGY CO., LTD. , http://www.marshine-power.com