Infusion three-way valve

 Electroforming electrode The tool electrode used for EDM can be manufactured by the electroforming method. Tianjin Science and Technology Press, 1982 4 Xiao Jingrong et al. The section of the processing process 2 has a fixed slope and a large diameter of tens of microns and a hole depth of several millimeters. Nowadays, nickel sulfamate plating solution and rapid electroforming deposition process are generally used in China, and an appropriate amount of additive activator Infusion three-way valve is added to improve the degree of electroforming layer to 0.

The application of electroforming technology in the injection mold manufacturing of the National Nine Scientific and Technological Research Projects recently completed by the Fujian Light Industry Research Institute has produced high-quality mirror cores that meet the requirements of optical mirrors, and pressed optical plastic products. After filling the back of the copper shell with a solid material liner, it can be used as When using injection molds, sometimes in order to facilitate demolding, a silicone rubber mold can be used for transition.　　

The method of demolding depends on the material of the original mold. That is, the conductive original mold is used as the cathode, the metal used for electroforming is used as the anode, and the metal salt solution of the electroforming material is used as the electroforming liquid.1, a variety of injection molds with complex curved contours or fine dimensions, electrodes for EDM cavities, and other metal parts □ Electroforming mold cavities require complex shapes and high precision injection mold cavities, using traditional The processing method is very difficult. Plastic mold technical manual

. The height of the straight edge is small.Principle of Electroforming Electroforming uses the phenomenon of cathode deposition in the electrochemical process to perform forming processing. When the electroformed layer on the original mold reaches the required thickness, it is taken out, and the electroformed layer is separated from the original mold to obtain an electroformed part opposite to the original model. 13 new type 2 electroforming technology made up for the defects of conventional electroforming mold cavity. Commonly used metal materials for electroforming are copper, nickel, iron, and the corresponding electroforming solution has copper, 

Megosztás a facebookon

Syringe Mould Company

When the particle size is 4060 mesh, the composite material has good erosion resistance and the particle size is easy to be dug out and fall off from the matrix.. Therefore, the matrix material is well protected and its 'supporting effect' is fully exerted. Therefore, the particles are cast tungsten carbide particles in ceramic particles. Under the action of casting infiltration force, the molten metal penetrates into the interstices of the particles, and transfers heat to the high-carbon ferrochrome particles and WC particles added to adjust the volume fraction.3

The composite material preparation process adopts the negative pressure casting infiltration process, that is, the composite layer particles with a little binder are spread on the surface of the mold (sand core). The particles in the iron-based surface wear-resistant composite material of this design improve the wear resistance of the material by preventing or reducing the micro-cutting and furrow deformation of the abrasive to the substrate during use. The erosion resistance test results are shown in Table 4. The austenite in the matrix is ​​formed by the amount of chro

mium exceeding Syringe Mould Company particles, high chromium cast iron with the same particle size, and HT300 as the base material.　　 is the organization of the interface between the composite layer and the substrate. 2 The structure of the surface composite material uses 0. When the WC particle size is 4060 mesh and the volume fraction is 36, its erosion resistance performance is good, which is 3 times that of high chromium cast iron. It can be seen from the above results that the composite The erosion and wear resistance of the materials is better than the contrast material high chromium cast iron. The main reasons why WC particle reinforced iron-based composites have good erosion resistance are: (1) As a reinforcing phase, the hardness and rigidity of WC particles are much higher than that of quartz sand, and they have better resistance to abrasive particles.3 to 0.

There is a transition zone in the bonding zone. Carbides precipitate to form a matrix of high chromium cast iron. 3. When the substrate is recessed, although the WC particles have a certain shadow effect on the substrate, However, because abrasive particles can enter the particle gap to cut, furrow and impact the matrix, the matrix is ​​severely worn, and the overall erosion of the composite material is not high. 

Megosztás a facebookon

Shown is a more typical valve control process: step, at the beginning of injection molding, open the gate (gate 2) in the middle of the mold and the melt is divided to both sides. In the second step, when the split melt just flows through the gates on both sides, close the middle gate (gate 2) and open the gates on both sides (gates 1, 3) at the same time. The third step, when the melt fills the mold Open all gates when filling/holding pressure begins. The fourth step is to close all gates before the end of the holding pressure. 2.2 Features of the program control valve 2.2.1 Weld marks Because of the use of the gate of the control valve, the melt in the mold enters the different positions of the mold cavity in sequence, so it can be seen from the first step that the gate 2 and the pouring

3.2 Effect of vacuum heat treatment of molds Beijing: Machinery Industry Press, 1994.475-495. Wang Dewen's new compilation of 300 practical mold techniques Beijing: Science Press, 1996.251-262. Mold materials and service life of the editorial board of the mold practical technology series.　　 Beijing: Machinery Industry Press, 2000.16-17. The brake valve directly saved more than 300,000 yuan in cost. With this program, about 750,000 yuan, not only achieved good economic benefits, but also accumulated experience for the maintenance and testing of about 50 dual-way brake valves each year, which can save the maintenance of large-scale complete sets of equipment each year.

Control system, thermal compensation system, etc., under conditions, can use 5-axis machining center to process complex cavities, reducing processing paths, etc. ⑵Furthermore, you can use OMAT technology (the speed is automatically adjusted according to the amount of cutting to ensure that the machine tool is always running at full load) and the adaptive control technology in the CNC system (automatically adjust the cutting parameters according to the information collected during the processing, Achieve excellent control).　　 2 Machining example 3; Material: 3 Outlook With the development of new drive and control technology, higher speed and larger feed rate machine tools become possible. The emergence of the new three-dimensional design machine, the application of laser processing technology to hard material molds, and the application of supersonic processing to hard and brittle material processing, will strongly promote the development of high-speed cutting processing.

Megosztás a facebookon