Shell casting puts resin coated sand on the preheated metal template with mould ,makes the resin melt and form a layer of shell.It achieves the desired moisture and rigidity after melting,drying and hardening.
The shell mold casting is applied to the automobile,train,shipbuilding,electronic and semiconductor industries.The material can choose a variety of copper alloys,aluminum alloy,zinc alloy,ductile iron,gray iron,stainless steel and carbon steel.
Shell casting is a metal casting process similar to sand casting,in that molten metal is poured into an expendable mold.However,in shell mold casting,the mold is a thin-walled shell created from applying a sand-resin mixture aroud a pattern.This casting process requires the use of a metal pattern,sand-resin mixture,dump box and molten metal.
The shell mold casting process is composed of following steps:
A two-piece metal pattern is set up in the shape of the desired part,typically from iron or steel.Other materials are also can be used,such as aluminum for low volume production or graphite for casting reactive materials.
After the molten metal is cooled,the mold can be broken and the castings can be removed.Trimming and cleaning processes should removed any excess metal from the feed system and any sand from the mold.
Shell Mold Casting Shell Mold Casting, Sand Mold Casting QINGYUN HUIHUANG EXACT CASTING CO.,LTD , http://www.sdhhcasting.com
1, ultra high pressure
Due to the popularization and use of high-pressure homogenizing equipment in nutrient solutions, bio-engineering, ultra-micro-crushing and nano-technology, its product coverage has rapidly expanded, and the pressure required to use it has also been increasing. China Homogenous Machinery Factory understands that more and more customers are required to use pressures above 100MPa. However, there are not many domestic factories that can produce pressures of 100 MPa, while only 150 MPa homogenizers can produce only some leading enterprises. The equipment abroad is relatively mature, and the maximum pressure can reach 200 MPa, but it is difficult for domestic users to accept because of its high price and difficulty in providing wearing parts.
2, automatic intelligent
With the need for automated production of modern large-scale industries, homogenizers can be independently connected in series. Greatly improved the degree of automation of food production. In order to make the food production line can be continuously stable, hygienic and efficient work, it needs a good match between the homogenizer and the pre-processing equipment, and can automatically adjust the technical parameters remotely under the dynamic conditions, and automatically check the operation status of each department. Automatically identify faults and automatically shut down under special conditions.
Huadong Brand High Pressure Homogenizer has complete varieties and specifications and can fully meet the needs of users in various fields. Homogeneous power from 1KW-200KW, pressure rushed 15MPa-150MPa, benchtop small homogenizer from 0.2 liters of material can be tested to 30,000 liters/hour super large homogenizer, up to more than 100 kinds of various specifications, for The highest in the industry in the country. Homogenous systems consist of a two-stage homogenizing system consisting of a primary valve and a secondary valve, both of which can be used simultaneously or independently. Homogeneous valve structure can be divided into flat and W-type two, flat valve can withstand high-pressure shock, with good wear resistance, long life and other advantages. The W-valve is a valve that can create multiple homogenous process configurations within a group of valve elements, greatly improving its homogenizing effect. The structure of the pump body valve is divided into ball type valve and disc type valve. The ball type has the advantages of high pressure resistance and long service life; the disc type has the advantages of simple structure and high volumetric efficiency.
East China brand high pressure homogenizer main features:
1. The drive part adopts forced cooling and pressure lubrication, which greatly improves the service life of the parts. It is suitable for long-term continuous work in modern industry. The transmission gear adopts herringbone gear transmission, and the operation is balanced, reliable and low in noise. The reciprocating speed of the plunger is designed to be between 130 and 160/minute. It is fully applicable to various viscosity liquids, reducing the valve wear to the final enemy level. The working part of the machine can withstand high temperatures of 140°C.
2. The working pressure is controlled by hydraulic pressure. The operation is convenient, the pressure relief is easy and the manual pressurization is changed. Large machine, super high production pressure. Just turn the knob to adjust the pressure.
3, the use of special device pressure display, reduce pressure gauge vibration, so that the service life of the pressure gauge to double, and as long as support needs, the pressure can be used pressure sensor digital display to show the pressure.
4, using a new type of wear-resistant sealing material, high pressure resistance, high self-lubricating performance, so that the service life of the plunger is 2-3 times higher than the original, the service life of the sealing ring is increased by 3-5 times, and To achieve long-term "drip" is the ideal realm.
5. The material pipeline adopts the material (tungsten cobalt alloy, cobalt-chromium-tungsten alloy) that is completely the same as the international products of the same kind, so that the service life of the vulnerable valve parts can be doubled compared with the original, and the long-term flushing of the acid-alkali solution can be tolerated.
6. The function of the homogenizer is mainly homogeneous. As long as there are materials passing through the homogenous valve once on the machine equipped with two-stage valve, the material is homogenized more than four times, and some can reach 6-8 times. In the same pressure situation, it greatly improved its homogenization effect.
Shell Casting
Features of Shell Mold Casting
Description
Shell Casting Process
Patten creation
Mold creation,mold assembly
High-pressure homogenizer future development
The development direction of the high-pressure homogenizer is summarized in the following two aspects: