Why the Molding Process Is So Important in Bottle Manufacturing

Plastic bottles for beverages make up more than 80 percent of the packaging that the PET industry makes. This does not include other plastic bottles for products such as salad dressing or oils. The process used to create these plastic bottles is known as stretch blow molding.

How Stretch Blow Molding Works

In this type of blow molding, a special stretch blow molding machine is used to expand polyethylene terephthalate with a hollow center. The machine will use a specific amount of air pressure in order to make each bottle a specific size. Depending on the intended use of the bottle or container, the company will consider the different sizes, shapes, and colors that the container or bottle may come in.

The manufacturer must also consider factors such as the properties of each plastic that they will be using. This means the manufacturer will need to use the right tools and the right amount of air pressure, depending on the exact type of plastic the manufacturer is using.

Depending on the desired color of the finished bottle, the manufacturer must use a variety of careful techniques. For example, to create a clear bottle, they must use a very specific heat. If the temperature is too high or too low, the bottle may end up looking pearlescent or an uneven color.

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Address Details :

Pet All Manufacturing Inc

620 Minnie Street , Paynesville, MN, 56362, USA

Business Email : ahobson@petallmfg.com

Business Phone Number  : 319-883-9264

The Major Advantages of a Stretch Blow Molding Machine

For goods that people use on a daily basis, manufacturers rely on different types of equipment. Among these are stretch blow molding machines, which various industries use to create plastic bottles, jars, and containers. By learning the key advantages of a stretch blow molding machine, you will gain a new appreciation for everyday items that most people take for granted.

• Product Variety – Companies use stretch blow molding machines to make plastic products in varying sizes and shapes. With this process, the manufacturer starts by creating a preform, which expands once heated from the air pressure blown inside. What makes these machines so incredible is the fact they can produce even complex designs. Although the food and beverage industry relies on this method the most, with such diversity the process benefits other sectors as well.
• Cost Efficiency – Because of the minimal cost of tooling and dies, you save money, which you can then pass on to your customers.
• Automation – Because the PET stretch blow molding machine is virtually 100 percent automated, there is also the benefit of reduced labor costs. Even when producing complex products, this equipment offers cost savings.

Choosing the Right Machine Source

For all equipment, including a PET stretch blow molding machine, we can help. Pet All Manufacturing dedicates itself to providing customers with top-of-the-line equipment at a competitive price. You can learn about our full line of options by visiting our website for one-on-one assistance or call to speak with a company representative today.

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Contact Details: 
PET ALL MANUFACTURING INC.
85 Royal Crest Court, Units 1 & 2 Markham,
Ontario, L3R 9X5
Phone: (905) 305-1797
Email: cmerrick@petallmfg.com

Exciting Advances of Stretch Blow Molding Machines

Thanks to innovation and more investments, manufacturers of stretch blow molding machine can produce superior-quality bottles with enhanced precision and speed. Industries that rely on the stretch blow molding process are and will continue to discover a new wave of machines that feature advances in flexibility and repeatability.

When it comes to innovative machines used for the stretch blow molding process, PET All Manufacturing is impossible to beat. We have a broad assortment of highly-advanced machines available. Contact us so that we can help you find the perfect solution for your manufacturing needs.

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Contact Details: 
PET ALL MANUFACTURING INC.
85 Royal Crest Court, Units 1 & 2 Markham,
Ontario, L3R 9X5
Phone: (905) 305-1797
Email: cmerrick@petallmfg.com

What Factors Affect the Price of a Blow Molded Part?

If you are relying on a blow molding machine for your business and a part wears down or breaks, it is essential to replace it with something of superior quality. Unless parts work correctly, you can expect a compromise on the machine’s operation and the quality of the finished product. The price you pay for a machine part depends on several factors. For instance, parts having to do with stretch blow molding are typically more expensive due to the increased complexity of the stretch blow molding machine.

The stretch blow molding process gets used for producing PET bottles such as those for water, juice, sports drinks, and more. In this case, a stretch blow molding machine stretches the preform in both the axial and hoop direction. Not only does that result in a unique shaped product, but also, by stretching the material  bi-axially, tensile strength increases, and clarity, drop impact, and barrier properties improve.

Additional Pricing Information

• Supplier - The supplier from which you purchase parts matters. A reputable company works to stay ahead of the competition, and therefore, keeps its pricing affordable without sacrificing quality. Also, when buying parts in bulk, there is traditionally even more cost savings. It is to your advantage to select a trusted and respected parts supplier.
• Resin Material - Another factor the significantly influences the price of parts is the resin material used. The least expensive options are polypropylene (PP) and low- and high-density polyethylene (HDPE and LDPE).

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Contact Details: 
PET ALL MANUFACTURING INC.
85 Royal Crest Court, Units 1 & 2 Markham,
Ontario, L3R 9X5
Phone: (905) 305-1797
Email: cmerrick@petallmfg.com
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Solving 3 Common Problems in PET Stretch-Blow Molding

PET or polyethylene terephthalate is commonly used as resin for stretch blow molding of bottles. Due to the nature of PET and various factors of the stretch blow molding machine, the occurrence of a few problems is inherent to the process. This blog discusses 3 of the most common problems which occur during PET stretch blow molding and their solutions.

Development of a Pearly Sheen and Haze (Whitening)    

If the PET is overstretched during the molding or is heated beyond 115 degrees Celsius during the injection or the blow stages, the formed bottle develops a distinct whitish tone. Since there are 2 different ways for the whitening to form, the whitening due to overstretching is called a pearly sheen and the one due to high temperature is called haze. In order to be able to prevent the development of the pearly sheen and haze, let’s understand the reasons for their formation. 

If the PET is overstretched while molding, its microstructure breaks up leading to the formation of a number of white circles which forms the pearly sheen. In order to solve this, the thin area which is affected should be cooled down and the part under the thin area should be heated so that the thin area receives a reinforcement of the material.On the other hand, haze forms when the temperatures reach beyond 115 degrees Celsius. At such temperatures, the molecules of PETA form crystals so as to achieve a lower energy state. Solutions range from lowering down the temperature source to increasing the ventilation.

Insufficient Top-load Strength 

Attempts to reduce the weight of the bottles are a common practice as it saves PET resin. However, such attempts often result in the falling of the top load strength below the required levels. The quality of the bottles then gets affected as they may break rather easily. To solve this, we have to realize that the bottles break at their weakest parts. These weak parts need to be replenished with more material in order to avoid insufficient top load strength. 

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Contact Details:

PET ALL MANUFACTURING INC.
85 Royal Crest Court, Units 1 & 2 Markham,
Ontario, L3R 9X5
Phone: (905) 305-1797
Email: cmerrick@petallmfg.com