Injection Parts

Inox Cast Injection Parts

Inox Cast uses high-tech machines such as CMM machines and approved CE standard injection parts. We can guarantee you satisfying assistance from inquiries to orders, from ordering to processing, and from processing to packaging and delivery.

As we all know, it’s hard to find perfect injection parts that exactly formed as you desire. Our company unites when doing updated models and modern injection parts for you. We intend to meet the requirements and expectations of our loyal customers.

We are allowing customization of our customers’ desires and requirements injection parts. You can tell us your details, including 2D, 3D, and all-angle injection parts drawings, to perfectly manufacture your design and style.

Inox Cast is so expert on manufacturing and sourcing any injection parts all over the world. And we are continuously importing our injection parts outside the country. Secured and undamaged purchased injection parts are what you can expect on Inox Cast services.

We have a full-time operation guiding your processing orders until you successfully receive your order. Hardworking sales staff are always ready to assist you 24/7. Fulfilling customer service is what you can experience on Inox Cast.

Your purchasing processes will successfully be done without hassle. The exact quantity minimum or a total number of ordered injection parts is what you will receive. Exact information and options we can offer for the best choice of our customers.

Please don’t hesitate to contact us now for more questions and inquiries, especially about injection parts!

Injection Parts: The Ultimate Guide

Before ordering for injection parts, read this guide.

It has all information you need about injection parts including benefits, classification, manufacturing process, surface finishing to possible defects.

With this information, you will get high quality injection molded parts.

Take a look:

1.  Benefits Of Injection Molded Parts

Below is a description of some of the benefits of injection molded parts.

injection parts

• The process of production of the injection molded parts is fast and efficient.

Parts of the same design can be produced in bulk at a very short period of time as long as the design and equipment are in place.

• Injection molded part can be in any design including the complex design.

These parts can be produced to fit into any kind of application because any design can be produced.

• The cost of these injection molded parts is low.

This is as a result of the low labour costs involved in the production process, since the machines are automated.

Another reason for low cost is that the molded parts are produced in bulk, reducing the cost for each part.

• Parts produced through injection molding can accommodate inserts in the design.

This is important because some applications require these inserts for the proper functioning.

• Injection molded parts, especially those from plastic, can be molded in any color as required.

This can be done through the use of compounding or masterbatches.

• The parts produced through injection molding does not require a lot of secondary finishes.

The parts are normally ready for their applications when molding is done.

• The parts produced through injection molding always have the advantage of an enhanced strength.

The parts are stronger compared to the rest of parts produced through other methods.

• Most parts produced through injection molding can be recycled in case of damage.

2.  Types Of Injection Parts

There are several types of injection molded parts depending on their applications as decribed below.

Medical Industry – parts produced through injection molding are widely used in the medical field for various applications.

Some of these parts include; Drug delivery components, beakers, implantable parts, test tubes, orthopedic components and many others.

Furniture parts – working with injection molding to create furniture parts makes it easier for manufacturers.

Some of the parts in the furniture industry are listed below; drawer handles, chair headrests, chair and table legs.

Consumer products – several consumer products depend on the process of injction molding to be achieved.

Such products include; toilet seats, tackle boxes, bird feeder, mobile phone cases, bottle cups and toys.

Automotive industry – this industry needs parts with complex and intricate designs like what is produced through injection molding.

Some of these parts include; bumpers, cup holders, mirror housings, dashboards, fuel tanks, and many others.

Agricultural industry – the agriculture industry is employing the use of the injection molded parts because of their complexity and durability.

Parts in this industry include; animal troughs, grates, sprayer parts, tubs, buckets.

Electronics industry – most of the parts in an electronic device are made through injection molding.

Some of these parts include; electrical connectors, protective sleeving, enclosures and many others.

3.  Machine And Equipment For Molding Injection Parts

Machines and equipment for injection molding come in various types such as:

The feeding system – molds or machines can be classified depending on the method of feeding the molten feedstock into the machine.

Hot runner injection mold – this is made up of a physical channel heated to high temperatures which directs the molten feedstock into the cavity.

The runner is designed to be part of the mold.

Cold runner injection mold – the physical channel for this case is not heated, and it is injected together with the feedstock.

The number of cavities – the molds can also be classified depending on the number of cavities it has.

Single cavity injection mold – this machine can only produce one part in every cycle.

It means the cost for every part produced will be very expensive.

Multi cavity injection mold – it can produce several parts in one cycle and the cost for each part is reduced.

Family injection mold – this machine can produce two and even more varying parts in one cycle.

This makes the parts less expensive.

The type of mold opening – this is classified depending on how the core is separated from the cavity.

Two plate mold – the parting plane for the mold is just one.

If it has several cavities, the gate and runner should be placed in the parting plane.

Three plate mold – this machine come with two parting planes.

This means the mold is split into three sections and the runners and gates can be in separate planes.

4.  Process Of Injection Molding Parts

Basically, there are four steps in the process of producing the injection molded parts.

Clamping

Before injecting the material into the molding machine, the clamping machine must first close the complimentary parts of the mold.

The sliding part of the clamping unit is pushed through the hydraulic power to aid in closing up the two halves.

This allows the injection of the feedstock to take place.

This process might take longer depending on the size of the machine.

Injection

The pellets or powder of the raw material in fed into the machine.

The injection unit moves it towards the mold and as it moves, the heat and preassure within the system melts it.

Once it is melted the molten feedstock is injected by the injection unit into the molding machine and it is held in there.

The pressure build-up ensures the material does not flow back.

Cooling

The molten material inside the molding machine starts to cool the moment it touches the internal surcafe of the machine.

As it cools to form a sold, it takes the shape of the molding machine and the cavities.

The cooling time which is appropriate for the kind of material being molded must elapse before the mold is opened.

Ejection

The ejection system will aid in ejecting out the already cooled and solidified part.

The ejection process takes place when the molding machine is opened through the clamping system.

injection molding process

5.  Choosing Material For Injection Molding Parts?

The choice of material will depend on the properties of the material, the cost of the material and the application of the molded part.

Acrylonitrile butadiene styrene – this material offers medium strength.

It has impact and flash resistant properties with an average material flow.

It has poor resistance to weathering hence it is normally used for consumer goods and toys.

Acrylic (PMMA) – the offers medium strength and it has a material flow which is good.

It can resist weathering, flash and shrinkage.

Also, it can be coloured and it is a good insulator and has perfect optical properties.

It is mostly used for outdoor applications.

High density polyethylene (HDPE) – this offers perfect resistance to impact and has a superior material flow.

It is pocket friendly and can resist shrinkage, it is also safe and can be used with food packaging.

Polypropylene – it possesses low strength but can resist impact.

It has excellent material flow but very poor resistance to flash.

Also, it is degradable by UV light and can be used for the production of consumer goods.

Polyethylene – it has low strength but can resist impact and the material flow is acceptable.

It is corrosion resistant, very flexible and safe with food and also lightweight.

It cannot resist weathering and it is normally used for making toys, buckets and bearings.

Polystyrene – it has medium strength and has average resistance to impact and can also resist shrinkage.

It is not resistant to chemicals and is a poor solvent.

The material can be used for making toys, cups and packaging products.

Polyvinyl chloride (PVC) – it has an average resistance to impact, flash and warping.

It is pocket friendly and is used for adding strength to other materials.

It is mostly used in making containers, and fencing materials.

Styrene acrylonitrile (SAN) – it has low resistance to impact and medium resistance to warping.

It is normally used for making cosmetic packaging, automotive applications, containers and many others.

6.  Ways Of Manufacturing Injection Parts

There are several ways that can be used to manufacture plastic parts, six of them are discussed below.

Rotational molding – this method applies the use of an oven and it is used for making larger or hollow or concave shapes.

Extrusion blow molding – this method is preferred when making thin-walled and less expensive products.

Reaction injection molding – it is normally used with automotive industry because it produces lightweight parts.

Vacuum casting – it is usually used for making protypes of what is to be produced through other processes like injection molding.

Thermoforming – it is also a type of vacuum forming and is used to make cups, boxes, lids and auto body parts.

Compression molding – this method is recommended for making gaskets, rubber keypad switches.

7.  Surface Finish On Injection Parts

Grade A: Glossy Injection Molding Surface Finish – The glossy finish can be achieved through the use of processes like diamond buff polish.

An abrasive material attached to a wheel is applied to the surface with low aggression.

This finish can be done on materials like acrylic.

Grade B: Semi-Glossy Injection Molding Surface Finish – there are products that need on a little bit of the glossiness and this can be achieved using a sandpaper.

It is used to achieve the finish suitable for aesthetic parts.

Grade C: Matte Injection Molding Surface Finish – this is the kind of finish used to remove machining marks.

It uses a stone to remove the marks for products that do not need the aesthetic finish.

Grade D: Textured Injection Molding Surface Finish – this is used for products that need rough surfaces.

It uses sandblasting to acquire this finish.

8.  Injection Parts Defects (And How To Eliminate Injection Molding Defects)

Flow lines – these can be lines, streaks or patterns with colors different from that of the product.

They happen as a result of the flow of the material into the molding cavity.

It can be prevented by increasing the injection pressure and speed or using round conners or changing gate position.

Sink marks – these are small depressions around the thicker areas caused by low pressure or poor cooling system.

Can be prevented by reducing thickness of the wall in the thicker sections or adjusting the mold temperatures.

Vacuum voids – these are air pockets within the molded part caused by uneven cooling of the product.

This can be prevented by adjusting the location of gates or changing the material or increasing the holding pressure.

Warping – this is as a result of non- uniform cooling which causes deformation of the molded part.

This can be avoided by allowing enough time for cooling and making sure it takes place slowly.

Burn marks – these are discolorations on the surface of the molded part caused by degraded plastic or overheating.

Can be prevented by reduced injection speeds, proper venting and appropriate temperatures.

Jetting – this usually happens when the viscosity of molten material is very high or when the melt temperature is very low.

It can be prevented by increasing the mold melt temperatures or adjusting size of gate or optimizing gate design.

For all your injection molded parts, contact us now.