The difference between plastic mold and injection mold
With the development of science and technology, plastic products have already become a kind of product that can not be replaced in our daily life. In real life, plastic products have almost occupied various categories. For example, in life, friends can see cars, boats, planes, computers, telephones and other few materials at any time, and a few of their plastic accessories are molded by plastic molds. When a product is born, it is necessary to open a mold, and we need to find a mold factory, often think that injection mold and plastic mold is the same meaning, hot ask about the difference between plastic mold and injection mold, please read this article, will take you to ask about the difference between!
Plastic mold, a combined plastic mold used for pressure molding, extrusion, injection, blow molding and low foaming molding, mainly comprises a concave die with variable cavity composed of a concave die composite base plate, a concave die assembly and a concave die composite card, and a punch die with a variable core composed of a punch composite base plate, a punch assembly, a punch composite card, a cavity cutting assembly and a side cut composite plate. Coordinate change of convex die, concave die and auxiliary forming system. Can process different shapes, different sizes of series plastic parts.
Injection mould is a kind of object for making plastic finished products; It is also the object of complete layout and cut size of plastic products. Injection molding is a processing technique used in the mass production of complex parts of certain shapes. It specifically refers to the hot melted plastic is shot into the mold cavity by injection molding machine under high pressure, after cooling and curing, the forming product is obtained. The injection mold is composed of moving mold and fixed mold. The moving mold is placed on the moving template of the injection molding machine, and the fixed mold is placed on the fixed template of the injection molding machine. In the injection molding, the moving mold and the fixed mold are closed to form the pouring system and the cavity. When the mold is opened, the moving mold and the fixed mold are separated to remove the plastic products. In order to reduce the heavy mold design and manufacturing workload, injection mold most accept the standard mold.
From the above content, it can be seen that there are certain differences between plastic molds and injection molds, which will facilitate the communication between us and plastic mold manufacturers and avoid mistakes.
Why do plastic mould products deform
A series of plastic parts of different shapes and sizes can be processed by the coordinated change of convex and concave die and auxiliary forming system of plastic mould. In order to meet the needs of molding parts, we need to pay attention to a few things when selecting plastic molds, and put forward the response needs. The following selection of more appropriate plastic mold requirements to meet the six general requirements
1, high corrosion resistance many resins and additives have erosion benefits on the cavity surface, this erosion makes the cavity surface metal dissolution, spalling, surface condition deteriorates, the quality of plastic parts deteriorates. Therefore, Z best use corrosion resistant steel, or the cavity surface for chrome plating, cymbal nickel disposal.
2. The gloss and precision of the surface of plastic finished products with good wear resistance are simply related to the wear resistance of the surface of plastic mold cavity. Especially when some plastics are added with glass fiber, inorganic filler and some pigments, they and plastic melt move at high speed in the flow channel and mold cavity, which has great conflict with the surface of the cavity.
3. Good dimensional stability in plastic molding, the temperature of the plastic mold cavity should reach more than 300℃. To this end, Z is the best choice of properly tempered object steel (hot tempered steel). Otherwise, it will cause the change of the microscopic layout of the material, resulting in the change of the size of the plastic mold.
4. Easy to process mold parts are mostly made of metal materials, and some layout shapes are very complex. In order to shorten the manufacturing cycle and improve compliance, mold materials are required to be easily processed into the shapes and accuracy required by drawings.
5. The plastic parts with good polishing performance usually require good luster and surface condition, so the roughness of the cavity surface is very small. In this way, the surface of the cavity must be processed, such as polishing and grinding. Therefore, the selected steel should not contain coarse impurities and holes.
6. Heat disposal has little impact. In order to improve hardness and wear resistance, heat disposal is generally required for plastic molds, but this punishment should make its size change very small. Therefore, the pre-hardened steel can be machined.
