Plastic is one of the most important components that is used in almost all industries. It's hard not to interact with plastic components every day.   This is because they are very useful in our day to day survival. Whether it's in the kitchen appliances, mobile phones, computers, medical equipment, cars, and many more.

But all these components have to pass through a special process known as plastic injection molding. This is critical and it’s done by highly specialized companies such as Let us look at plastic injection molding into deeper details.

Plastic injection molding explained

Molding also referred to as molding is the process of shaping pliable or liquid material b the use of a rigid frame. However, there are many techniques used for plastic moldings such as injection molding, rotational molding, thermal molding, compression molding, blow molding, and plastic extrusion molding. The difference between these techniques is the number of components that need to be produced and also the size of the product. 

Plastic injection molding involves injecting molten material in a mold to produce parts. This technique is popular because it can produce precise parts at a high speed and low cost. Also the higher the number of parts you are producing the cheaper it will cost you.

Another advantage of using plastic injection is low scrap rates. When compared to other methods, the original plastic block is used extensively. Traditional techniques tend to waste a huge chunk of the initial plastic sheet.

Contract manufacturing

A contract manufacturer mainly deals with, close tolerance, high precision, medium-sized, and small-sized plastic parts. Many companies offer a range of services such as mold production, design assistance, assembly, and injection molding.

Even some of the world's biggest companies such as Tesla and apple use contract manufacturing to scale up their production levels. However, this model has both pros and cons just like every other operational model.

Contract manufacturing simply means outsourcing. The hiring manufacturer strikes a deal with the contract manufacturer with a formula. Price is quoted by the contract manufacturer depending on the processes such as tooling, material costs, and labor. In short, the hiring firm will approach man contract manufacturers and request quotes. Once the bidding complete, the firm will choose a source with an agreed price and the contract manufacturer will act as the factor.

So the contract manufacturer will start producing and shipping units In place of the hiring firm. So in short, job production is done on a contract basis. Although it also acts as a subset of contract manufacturing. The company has to trust a contractor to take care of his entire production which is always the case especially in medical device contract manufacturing.

Benefits of plastic injection molding contract manufacturing

Contract manufacturing has man benefits as well as some risks just like n another production line. Besides that, companies are still outsourcing their production to other companies. The following are some of the benefits of contract manufacturing.

Cost savings- Most companies end up saving a lot of money when it comes to being or maintaining equipment. So you don't have to buy a machine that you will not be using. Instead, you just find a company with the machines available. Also, you will save in terms of training, wages, and benefit. 

Advanced skills- If a company does not poses a certain skill, then it’s easier to take advantage of a more skillful company. So the contract manufacturer is more stead in terms of raw material supply and machines.

Mutual benefit- Long-term relationships can be created by contract manufacturing between two companies. This means that the two companies may have a steady business flow for several years.

Quality- Contract manufacturing ensures that the final product is of high quality since the two companies will run a quality check. Any counterfeits will be detected as soon as possible.

Economies of scale- Since the CM has many customers that they have to produce products for, then the do it at a reduced cost. When you acquire raw materials on a large scale then you are likely to benefit from subsidized prices. Also shipping more items at once is less costly.

Risks of contract manufacturing

Lack of control- Once you allow another company to do the work for you, then you will not be in full control anymore. You cannot force the company to implement strategies.

Relationships- These companies can build a relationship easily but also the opposite is very possible. When you subcontract the work, you must have in mind that the company has other customers too. So you cannot force them to work on our products first.

Intellectual property loss- A contract involves a lot of things such as divulging formulas to your contract manufacturer. The employees of the other company might gain access to your core competencies.


Plastic injection molding is one of the best techniques for making plastic parts. This is because out can produce very complex designs at a high volume and a low cost. But the machines for doing this are very expensive. But just like the other manufacturing industries, contract manufacturing helps in producing your parts at a fair price.