CNC Lathe Turning

CNC Lathe Turning

Ming Xiao Offer CNC Lathe Turning Service

We are professional turning parts manufacturer from China,we specialize in produce stainless steel turned parts, carbon steel turned parts, Aluminum alloy turned parts, brass & copper turned parts, sometimes we also make plastic turning parts.we provide CNC precision turning service,automatic & semi automatic turning service,manual turning services.

CNC turned Steel Parts
CNC turned Steel Parts

CNC Lathe Turning

Lathe Turning machining technics is widely use in machine parts production, it’s on a lathe and using the rotation of the workpiece and tool motion in a straight line or curve motion to change the blank shape and size, it processed into conform to the drawing requirements.

And the CNC lathe turning machines is different for different workpieces, low precision & normal quantity turned parts should be made by manual lathe, some small turned parts & with high volumes should work on automatic lathe, and some parts with very high precision request(such as in 0.05mm),that we shall consider use CNC lathe to work.

CNC Precision Turning

CNC lathe machining is a high-precision, high-efficiency machining method for controlling the displacement of parts and tooling with digital information for automated machine tools. It is an effective way to solve the problems of variety, small batch size, complex shape and high precision of aerospace product parts and realize high efficiency and automatic processing.

CNC lathes are one of the most widely used CNC machines. CNC lathes are mainly used for machining rotary parts such as shafts and discs. Through the operation of the NC machining program, the cutting process of the inner and outer cylindrical surface, the conical surface, the forming surface, the thread and the end surface can be automatically completed, and the work of the groove, the drilling, the reaming, the reaming, and the like can be performed. The turning center can complete more machining operations in one setup, improve machining accuracy and production efficiency, and is especially suitable for machining complex-shaped rotary parts.

Some ordinary machine tools can not or inconveniently process parts, the processing quality is stable, and the labor intensity of workers is reduced.

Hope you are interest in our CNC Lathe turning Service, Welcome send inquiry to us to get a quate.

Plastic Injection Molding

Plastic Injection Molding Services For Plastic Parts.

Ming Xiao Mfg engaged in custom plastic molded parts by plastic injection molding more than 15 years, our factory is from Ningbo China, we can custom all kinds of plastic molded  parts,steel pins inserted plastic parts.

We have 20T-530T plastic injection molding machines, each with a production capacity ranging from 1 gram to 2000 grams. Materials used are polypropylene (PP), polyvinyl chloride (PVC), polyethylene polyethylene (PE), LDPE, HDPE, nylon (PA), nylon 66 + 30% GF, POM, PC, ABS, SBS, TPR , TPE.

Plastic Injection Molding

Quality Plastic Injection Molding

The process cycle for plastic injection molding is very short, typically between 2 seconds and 2 minutes, and consists of the following four stages:

Clamping – Prior to the plastic injection of the material into the mold, the two halves of the mold must first be securely closed by the clamping unit. Each half of the mold is attached to the injection molding machine and one half is allowed to slide.

The hydraulically powered clamping unit pushes the mold halves together and exerts sufficient force to keep the mold securely closed while the material is injected. The time required to close and clamp the mold is dependent upon the machine – larger machines (those with greater clamping forces) will require more time. This time can be estimated from the dry cycle time of the machine.

Injection – The raw plastic material, usually in the form of pellets, is fed into the injection molding machine, and advanced towards the mold by the injection unit. During this process, the material is melted by heat and pressure. The molten plastic is then injected into the mold very quickly and the buildup of pressure packs and holds the material. The amount of material that is injected is referred to as the shot.

The injection time is difficult to calculate accurately due to the complex and changing flow of the molten plastic into the mold. However, the injection time can be estimated by the shot volume, injection pressure, and injection power.

Cooling – The molten plastic that is inside the mold begins to cool as soon as it makes contact with the interior mold surfaces. As the plastic cools, it will solidify into the shape of the desired part. However, during cooling some shrinkage of the part may occur. The packing of material in the injection stage allows additional material to flow into the mold and reduce the amount of visible shrinkage. The mold can not be opened until the required cooling time has elapsed. The cooling time can be estimated from several thermodynamic properties of the plastic and the maximum wall thickness of the part.

Ejection – After sufficient time has passed, the cooled part may be ejected from the mold by the ejection system, which is attached to the rear half of the mold. When the mold is opened, a mechanism is used to push the part out of the mold. Force must be applied to eject the part because during cooling the part shrinks and adheres to the mold.

In order to facilitate the ejection of the part, a mold release agent can be sprayed onto the surfaces of the mold cavity prior to injection of the material. The time that is required to open the mold and eject the part can be estimated from the dry cycle time of the machine and should include time for the part to fall free of the mold. Once the part is ejected, the mold can be clamped shut for the next shot to be injected.

After the plastic injection molding cycle, some post processing is typically required. During cooling, the material in the channels of the mold will solidify attached to the part. This excess material, along with any flash that has occurred, must be trimmed from the part, typically by using cutters.

Plastic Injection Mold Design
plastic injection mold

For some types of material, such as thermoplastics, the scrap material that results from this trimming can be recycled by being placed into a plastic grinder, also called regrind machines or granulators, which regrinds the scrap material into pellets. Due to some degradation of the material properties, the regrind must be mixed with raw material in the proper regrind ratio to be reused in the injection molding process. Injection molding is the most commonly used manufacturing process for the fabrication of plastic parts.

A wide variety of products are manufactured using injection molding, which vary greatly in their size, complexity, and application. The injection molding process requires the use of an injection molding machine, raw plastic material, and a mold. The plastic is melted in the injection molding machine and then injected into the mold, where it cools and solidifies into the final part. The steps in this process are described in greater detail in the next section.

Plastic injection molding is used to produce thin-walled plastic parts for a wide variety of applications, one of the most common being plastic housings.

Plastic housing is a thin-walled enclosure, often requiring many ribs and bosses on the interior. These housings are used in a variety of products including household appliances, consumer electronics, power tools, and as automotive dashboards.

Other common thin-walled products include different types of open containers, such as buckets. Injection molding is also used to produce several everyday items such as toothbrushes or small plastic toys. Many medical devices, including valves and syringes, are manufactured using injection molding as well.

Want to know more about Plastic injection molding technics,pls visti https://www.wikipedia.org/.