Zinc Alloy Die Casting have a good surface roughness, strength and elongation, Which are widely used in a variety of ornaments, such as furniture, accessories, door handle,architectural decoration, bathroom accessories, lighting parts, toys, tie clips, belt buckles, various metal buckle and so on,they are required a good surface treatment performance. The traditional zinc alloy die-casting material are Zamak 2,3,5,7 , the Zamk 3 is the most widely used in different industries Zinc Casting, Zinc Alloy Die Castings, Zinc Pressure Die Casting, Zinc Die Casting Products Ningbo Zhenhai Xinxie Machinery Co.LTD , https://www.xinxie-diecasting.com
Weak wiring construction steps:
First, determine the location of the wiring points 1, the basis for the determination of weak wiring points: In accordance with the wiring design drawings, combined with the schematic diagram of the points on the wall, with a pencil, ruler or ink fountain to mark the location of the cassette at each location.
2, the cassette height is determined: In addition to special requirements, the height of the cassette is consistent with the original strong electric socket, the height of the background music tuning switch should be consistent with the height of the original strong electric switch. If there are multiple cassettes together, the distance between the cassettes is at least 10mm.
Second, slot 1, determine the slot route according to the following principles:
A. The principle of the shortest route;
B, does not destroy the original principle of strong electricity;
C. Do not break the waterproof principle.
2. Measurement of slot: The cassette and slot are calculated independently. All slots are measured from the beginning of the slot to the end of the slot. If the width of the slot is greater than two pipes, the length should be calculated by more than twice.
3, appearance of trough appearance: horizontal and vertical, uniform size.
4, to determine the slot width: According to the number of signal lines to determine the number of PVC pipe, and then determine the width of the slot.
5. Determine the groove depth: If a 16mm PVC tube is used, the groove depth is 20mm; if a 20mm PVC tube is selected, the groove depth is 25mm.
III. Construction of integrated wiring for weak current projects 1. Ensure that the cables are unobstructed:
A, network cable, telephone line test: do the crystal head separately, use the network tester to test continuity;
B. Testing of cable television lines, audio and video cables, and audio cables: testing the on/off with multimeters respectively;
C. Other cables: Test and disconnect with corresponding professional instruments.
2, determine the line length of each point:
A. Measure the length of the wiring box slot to each point;
B, plus the length of the redundant lines at each point and at the wiring box slot: The length of the outlet line at each point is 200mm-300mm.
3, determine the number of pipe lines: the cross-sectional area of ​​the pipe line shall not exceed 80% of the pipe cross-sectional area.
4. Identify the label: Label each type of cable by cutting it at a certain length and label it on both ends of the wire. Note: Weak electricity type - room - serial number.
Fourth, seal slot 1, fixed cassette: In addition to the kitchen, bathroom cassette to project out of the wall 20mm, other cassettes and wall requirements flush. Several cassettes are required to be on the same level.
2, fixed PVC pipe:
A, ground PVC pipe requires a fixed interval of one meter;
B. Groove PVC pipe requires every two meters must be fixed;
C, wall groove PVC pipe requires a fixed interval of one meter.
3. Sealing groove: The wall surface and ground surface after sealing the groove must not be higher than the plane.
4. Clean the weak electric wiring construction site: After the sealing tank is closed, remove the garbage and clean the construction site.
Zamak 3: good fluidity and mechanical properties. Used in casting of low mechanical strength, such as toys, lamps, decorations, some electrical parts.
Zamak 5: good mobility and good mechanical properties. Applied to certain requirements of the mechanical strength of castings, such as auto parts, electrical and mechanical parts, mechanical parts, electrical components.
Zamak 2: there are special requirements for mechanical properties, hardness, wear resistance, dimensional accuracy requirements of the mechanical parts
.ZA8: good flowability and dimensional stability, but less liquid. Used in die casting, small size, accuracy and mechanical strength demanding workpieces, such as electrical appliances. Superloy: the best mobility, applied to the die-casting thin-walled, large-size, high precision, complex shape of the workpiece, such as electrical components of the box.
Different zinc alloys have different physical and mechanical properties, such as die casting design provides room for choice. The same time, the choice of the zinc alloy is more important to select what kind of zinc alloy, mainly from three aspects to consider
1. Die-casting their own purposes, need to meet the performance requirements. (1) mechanical properties, tensile strength, when the material fracture resistance; Elongation, brittleness and plasticity of the measure;Hardness is the resistance of the material surface is pressed into a hard object or friction caused by plastic deformation. (2) state of the working environment: temperature, humidity, media contact with the workpiece and air tightness requirements. (3) precision: accuracy and dimensional stability can be achieved.
2. process performance: (1) casting process; (2) mechanical processes; (3) surface treatment.
3. Economic good: the cost of raw materials and production equipment requirements (including smelting equipment, die casting machine, mold, etc.), as well as production costs.
The focus of weak construction process
Weak current generally refers to a DC circuit whose voltage is within 36V. Audio, network lines, telephone lines, video lines, etc., are all part of a weak system. Electrical appliances such as telephones, computers, televisions (cable television lines) and audio equipment (output lines) are all weak electrical devices. When referring to these weak electrical devices, you may think about the problem of signal transmission. To ensure the normal transmission of these equipment signals, integrated wiring plays a very important role. In addition, integrated wiring is a common item in weak electric construction. It is also the most common and critical part of weak electric construction. Here's a look at it with you: The wiring process in weak construction.