Mold material
1. The mold materials required for the surface of the product are available: NK80 (Japan Datong), etc.;
2. Material selection for high light requirements: S136H (Sweden), CEANA1 (Japan), etc.;
3. NK80 does not require quenching treatment; S136H should be quenched to 52 degrees after rough machining; CEANA1 itself has 42 degrees and does not require quenching treatment (it is recommended to use this steel because it does not affect subsequent processing or changes);
4. There are also good choices in the German Gritz brand: CPM40/GEST80
Mould waterway design
1. Waterway aperture size design The water channel adopts a diameter of 5-6mm; the water nozzle uses 1/8 or 3/8 teeth (mold side), and the other side uses 3/4 inch thread (old-fashioned connection); the pipe fittings are made of stainless steel pipes; now we change The banned word in the shunt is made in the mold, and the interface is connected with DN25, so that the heat loss is small, the operation is convenient, and the interface is convenient.
2. Product design The side of the water channel away from the product surface is generally 5-6mm; a larger selection will affect the temperature rise time of the mold, and a smaller selection will affect the strength of the mold. The parallel product surfaces of the water channels need to be evenly arranged (the original mass center is 15mm equidistantly distributed). The thermocouples should be designed in the middle of the two water channels with a depth of 50mm or more. The prohibited words should not exceed 100mm. It can be controlled flexibly depending on the structure of the mold. Each set of mold PT100 is matched with one. To maintain its accuracy, it must be inserted into the mold cavity and fixed. Use the lead wire to connect to the outside of the mold, and then connect to the socket of the temperature controller.
3. Mould waterway joint design The mold waterway joints must be designed at the upper and lower ends or the rear side of the mold; the operating side (the side of the station) does not allow the water inlet and outlet or the arrangement of water pipes to avoid the pipe rupture and scald the production personnel. Remember!
4. Mould inlet and outlet nozzle design The mold inlet and outlet nozzles are designed with a splitter plate. The hydrothermal mold temperature control system has only one inlet and one outlet to reduce excessive water pipe connections and unnecessary heat loss; and achieve the purpose of energy saving. And the outer surface of the corrugated pipe is wrapped with heat-insulating tape to play a role in heat preservation.
5. Mould construction holes The construction holes of the mold (unnecessary holes) should be blocked with plugs to ensure that there is no leakage of air or water. The method is to plug first with copper, and then seal with a tapered throat and high temperature resistant glue; the arrangement of the cooling water channel of the high-gloss mold is compared Pay attention to (the water and heat mold water channels are shared), a good water channel arrangement can not only greatly improve the efficiency of injection molding, but also play an important role in improving product quality. The water channel of the high-gloss mold must not only be uniform, but also must be sufficient (there must be a sufficient number). In this way, the temperature of the mold is quickly raised; at the same time, the use of an extended water pipe to directly transport the mold core without the use of a sealing ring can prevent the mold from operating at high temperatures for a long time, causing the sealing ring to age, and can also reduce the maintenance cost of many molds. It is worth mentioning that the water-carrying pipe of the high-gloss mold must be made of high-temperature resistant material (250℃) bellows.
High pressure 1.6Mpa bellows to prevent the water pipe from bursting under high temperature and high pressure. For round products, circular water transportation is used; for long products, parallel water transportation channels are used. For products with large height differences, the water well form is adopted; for special-shaped products, a three-dimensional water transportation method consistent with the product appearance is adopted.
Post time: Sep-22-2021