Casting molds and plastic molds are a little more difficult

The plastic mold is relatively simple, because the plastic mold only needs to design the cavity and core, or the moving mold kernel is almost the same, and many of the remaining parts can be applied to standard parts, of course, this is what I think from the student's point of view.

In actual production, plastic molds are often equipped with side core-pulling mechanisms, which is the difficulty of plastic molds.

Casting mold refers to in order to obtain the structural shape of the part, the structural shape of the part is made in advance with other materials that are easy to form, and then the mold is put into the sand mold, so that a cavity with the same structural size as the part is formed in the sand mold, and then the fluidity liquid is poured in the cavity, and the liquid can be formed after cooling and solidifying the part that is exactly the same as the shape and structure of the mold.

Thermoplastic molds.

Thermoplastics refer to plastics that can be softened to a molten flow within a certain temperature range and cooled and then solidified into a certain shape. This process can be repeated multiple times.

1) Solid (structure): linear polymer compounds with branched chains.

2) Advantages: good physical and mechanical properties, easy to form.

3) Disadvantages: Generally poor heat resistance and rigidity (except for a few products).

4) Typical varieties: PE polyethylene; PP polypropylene; P.S. polystyrene.

It's all the same, but the plastic mold is a little more detailed.

Aluminum model, iron model. Wax model for precision casting, polystyrene model for lost foam. Casting mold refers to in order to obtain the structural shape of the part, the structural shape of the part is made in advance with other materials that are easy to form, and then the mold is put into the sand mold, so that a cavity with the same structural size as the part is formed in the sand mold, and then the fluidity liquid is poured in the cavity, and the liquid can be formed after cooling and solidifying the part that is exactly the same as the shape and structure of the mold.

They are a type of mold mainly used to mold thermoset plastics, and their corresponding equipment is a pressure molding machine. According to the characteristics of the plastic, the compression molding method heats the mold to the molding temperature (generally 103°-108°), and then puts the metered compression powder into the mold cavity and feeding room, closes the mold, and the plastic is softened and viscous under the action of high heat and high pressure, and cured and shaped after a certain period of time to become the desired product shape. Pressure injection molding is different from compression molding in that there is a separate feeding chamber, the mold is closed before molding, the plastic is preheated in the feeding chamber and is in a viscous flow state, and the mold cavity is adjusted and extruded under the action of pressure, and hardened and formed.

Compression molds are also used to mold certain special thermoplastics, such as hard-to-melt thermoplastics (such as polyvinyl fluoride), blanks (cold press molding), plastic lenses with high optical properties, and slightly foamed nitrocellulose car steering wheels. The compression mold is mainly composed of a cavity, a feeding cavity, a guide mechanism, a push-out part, a heating system, etc. Press-injection molds are widely used to encapsulate electrical components.

The materials used to make this kind of mold are cast aluminum, stainless steel, bronze, etc.

Learn, is it useful to learn? Now I have to sell a few CNC machine tools to run a small mold factory to survive, I have been a casting mold worker for 30 years, because there is no CNC machine tool and now I have to be unemployed!

The temperature of plastic mold production is about 200 degrees, and the plastic wears little on the mold, and generally 500,000 times the mold does not wear out. When the casting mold is produced, the temperature is above 600 degrees, and the wear of the metal on the mold is more serious, and the mold has obvious wear after 100,000 times.

The way and principle of feeding are different, and the two are very different.

The others are pretty much the same.

Explanation of the casting mold.

mold, mould]

Cavities that shape fluids or malleable substances Explain in detail A general term for casting models.

Words break down Lao Pei.

Explanation of casting casting (noisy casting) ù melting metal and pouring it into a mold to make an object: cast iron. Foundry.

Cast. Casting. Coins.

radical liter contains line: 钅; Explanation of modulo modulo ó French, norm, standard : exemplary.

Mode. Model. Model.

Templates. Molded. Emulate:

Imitation (also known as "imitation"). Simulation (also known as "imitation"). Molding.

Specifically refers to "exemplary": model workers. Heroic model.

模 ú appearance A person's appearance or attire The appearance of the dress.

1. The requirements of sand casting molds are low, and the tolerance range of mold processing is very wide, because even very precise sand casting castings have positive and negative tolerances. The precision of the die-casting mold is very high, and some customers have extreme requirements for the tolerance of the die-casting parts to reach plus or minus without machining).

2. The mold used for sand casting can be a wooden mold, an aluminum mold, or a cast iron (there is very little cast steel), and the die-casting mold must use alloy steel.

3. Sand casting can be done by hand molding, vibration molding machine modeling, sand injection molding machine, static pressure molding machine, resin sand molding, and die casting must use die casting machine, so the installation method of the mold is completely different.

Die casting, a metal casting process characterized by the use of a mold cavity to apply high pressure to melted metal, is usually machined from a stronger alloy, a process somewhat similar to injection molding.

Casting, a method of pouring liquid metal into a casting cavity that is suitable for the shape of the part, and waiting for it to cool and solidify to obtain a part or blank.

2. The process of die casting and casting is different:

The essence of pressure casting (referred to as die casting) is to make liquid or semi-liquid metal fill the cavity of the die-casting mold at a high speed under high pressure, and form and solidify under pressure to obtain castings.

The casting process can be divided into three basic parts, namely casting metal preparation, casting preparation and casting processing, casting metal refers to the metal material used for pouring castings in casting production, it is an alloy composed of a metal element as the main component and adding other metal or non-metallic elements, which is customarily called casting alloy, mainly cast iron, cast steel and cast non-ferrous alloys.

3. The casting accuracy of die casting and casting is different.

Die casting is a precision casting method, the size tolerance of the die casting cast by die casting is very small, the surface accuracy is very high, in most cases, the die casting can be assembled without turning.

Hope it helps, dear

Injection molds and plastic molds are both molds, and there are similarities and differences.

Injection mold is one of the types of plastic molds, plastic molds include: injection molds, extrusion molds, blister molds. Like the injection mold production, the method of injecting plastic material is used, and the mold is opened and then the product is formed.

Injection mold can also be understood as a mold is empty in the middle and then there are fixed holes on the body, through the holes to inject plastic materials into it, through high temperature heating, molding, open the mold, get the product.

Plastic mold, an abbreviation for a combined plastic mold used for compression, extrusion, injection, blow molding and low-foaming molding. It mainly comprises the die with variable cavity that is made up of die combination substrate, die assembly and die combination clamping plate, and punch with variable core that is made up of punch combination base plate, punch assembly, punch combination card plate, cavity truncation assembly and side section combination plate. Coordinated changes in mold convex, concave mold and auxiliary molding system.

It can process a series of plastic parts of different shapes and sizes.

Plastic molds include injection molds There are many types of plastics, and the molds used on injection molding machines are called injection molds. Molds that can use plastic are called plastic molds.

Plastic is a material, and injection molding is a type of mold production.

Plastic molds include injection molding, blow molding, and extrusion plastic molds. Injection molding is relatively simple and versatile.

Plastic molds are collectively referred to.

Injection mold is one of the plastic molds, or extrusion molds, slush molds and so on.

The classification of molds is also differentiated according to the different processing processes. Extrusion process, injection molding process, slush molding process.

In terms of application, the injection molding process can only make fixed products with a certain shape. For example: injection molding a mobile phone case, bowl, computer case and so on.

Extrusion is the continuous extrusion production within the range of cross-sectional shapes, which can be infinitely long, such as: tubes, profiles, plates, sheets, which are made by the extrusion process.

The slush molding is like a child's toy, the hollow, rubber ball is made of slush molding.

Injection mold is also a type of plastic mold, but it is divided according to the molding process. Let's show you the classification of molds. ：

According to the different materials formed, molds can be divided into metal molds and non-metal molds. Metal molds are divided into: casting molds (non-ferrous metal die-casting, steel casting), and forging molds; Non-metallic molds are also divided into:

Plastic molds and inorganic non-metallic molds. According to the different materials of the mold itself, the mold can be divided into: sand mold, metal mold, vacuum mold, paraffin mold and so on.

Among them, with the rapid development of polymer plastics, plastic molds are closely related to people's lives. Plastic molds can generally be divided into: injection molding molds, extrusion molding molds, gas-assisted molding molds and so on.