• March 09, 2021

PTFE tapes are all professionally used. Non-professionals often encounter similar problems when using them, such as: how to wrap it? How many turns can be wound firmly without leaking?  In fact, how to use it correctly is often taken carelessly by people as a minor issue, but "thousands of miles of dams, destroyed by ant dens", home improvement is no small matter, and the decoration is c...

• March 17, 2021

The core shooter uses coated sand to make the core, which is suitable for both hot core boxes and cold core boxes. The core shooting machine is characterized by the use of two guide posts to open and close the mold vertically, and install two different molds at the same time. The fixed mold can be installed on both sides of the middle fixed frame, and the mold can be opened and closed (equivalent ...

• March 23, 2021

Butterfly valve is a frequently used valve in industrial water system. It has become a common valve for pipelines because of its small size and high cost performance. The main products of butterfly valves are wafer soft-sealed butterfly valves and flanged butterfly valves. Although there are fewer types of butterfly valves than gate valves, there are also many differences to adapt to different wor...

• March 31, 2021

PTFE machine is a raw material belt plastic machine, it is not a single machine, it is a combination of a series of machines composed of machines with different functions. A set of raw tape equipment needs about 60,000 to 100,000 yuan. With a set of raw tape equipment, we can enter the raw tape production process, so it is relatively simple to build a raw tape factory. The main material of the PTF...

• April 09, 2021

Gravity casting refers to the process of injecting molten metal into a mold under the action of the earth's gravity, also known as casting. The generalized gravity casting includes sand casting, metal casting, investment casting, lost foam casting, mud casting, etc.; the narrow gravity casting specifically refers to metal casting. The molten metal is generally poured into the gate manually, and th...

• June 03, 2021

At present, more than 80% of copper in the world is made by fire method, and it is mainly used to process copper sulfide ore. Pyrometallurgy is to melt copper ore (or calcine, agglomerate, etc.) and flux at high temperature, or directly smelt into blister copper, or first smelt into matte (melt mainly composed of copper, iron and sulfur) Then smelt into blister copper. Except for some operations (...

• June 30, 2021

When buying a single-handle basin faucet, you should pay attention to the diameter of the spout. Most of the water in the market belongs to the hard pipe, so you should pay attention to the height of the upper spout. It is most suitable to go down from the basin to 35 work points. During installation, a special angle valve must be selected, and the angle valve must be fixed to the hot and cold wat...

• July 07, 2021

Brass is a copper alloy with zinc as the main alloying element. According to its chemical composition, brass is divided into two types: ordinary copper and special brass. (1)Ordinary brass is a binary alloy of copper and zinc. Due to its good plasticity, it is suitable for manufacturing plates, bars, wires, pipes and deep-drawn parts, such as condenser tubes, radiator tubes, and mechanical and ele...