2.5 Manufacturing Process (Two-Stage (SBM)

2.5 Manufacturing Process

PolyPet bottle and containers are manufactured using SBM. The company has two manufacturing methods they use to SBM which are Two-Stage process and One –stage method. So, for my project I was interested in Two- Stage process whereby the preform are injection moulded separately before being blown and this process is ideal for medium to large scale production of PET bottles.

Figure 4: Flow Diagram of the sequence of Two-Stage SBM process

2.5.1 Manufacturing procedure

1. First, a preform is injection moulded, preform look like a miniature version of final product, comprised of the finished neck with threads and a small, thick walled lower section, which will be blown into final shape.

2. The preform is

Processes like IBM since they can produce unlimited net shape as compare to SBM process. Injection Blow Moulding process it’s also a one-way production process with and very fast to setup are compared to stretch blow moulding which consists of two – stages.

Lastly by changing to Injection Blow Moulding it’s going to save them from high cost since IBM process does not have lot of external machine that consume lot of high energy which adds up to high cost to setup and maintain these machines. Also, another thing if they use Injection blow moulding it’s going to help them from hiring two operators instead of one operator just to operate one continuous machine with few external machines to operator.

3.3 Constraints

The is a physical Constraint which is the High cost for setting up their production line for the first product produce and the high energy they use since the uses lot of external machine that consume lot of electricity. This leads to high loss than profit supposed to be generated by the company in this process and high cost in operation since not only one operator but two operators for the production line since its automated

Some troublesome developing environmental matters involve plastics. Recycling can improve some of the problems, but the misunderstanding over what we can and cannot recycle continues to confuse consumers. Plastics are mostly troublesome, as different types require different processing to be reformulated and re-used as raw material. To successfully recycle plastic items, you need to know two things: the plastic number of the material, and which of these types of plastics your municipality's recycling service accepts. Many facilities now admit number 1 through number 7 but check with them first to make sure.

PET (Polyethylene terephthalate)

The easiest and most common plastics to recycle are made of polyethylene terephthalate (PET) and are allocated the number 1. Examples include soda and water bottles, medicine containers, and many other common consumer product containers. As soon as it has been managed by a recycling facility, PET can become fiberfill for winter coats, sleeping bags, and life jackets.

It can also be used to make beanbags, rope, car bumpers, tennis ball felt, combs, sails for boats, furniture and, of course, other plastic bottles. However, tempting it may be, PET #1 bottles should not be re-purposed as reusable water bottles.

HDPE (High-density polyethylene