Oepin's blow molding capabilities and features

Oepin is capable to provide cost-effective blow molding services and quality products with high precision and accuracy for vast customized projects.

Blow Molding Custom Services and Parts - OEM&ODM Oepin Manufacturers and Companies

Blow molding, also known as blow molding, blow molding, is a manufacturing process for forming hollow plastic parts: it was initially used to form glass bottles.

Generally, there are three main types of blow molding: extrusion blow molding (EBM), injection blow molding (IBM), and injection stretch blow molding (ISBM). Each process has unique design advantages for the production of different products.

Types of Blow Molding

Oepin offer blow molding services using all types of blow molding.Below is a detailed introduction to the three main forms of blow molding

Injection blow molding combines traditional injection molding with blow molding. In injection blow molding, preforms or blanks are made by injecting molten plastic onto metal rods in a mold. This forms the preform. The preform and metal rod are then transferred to another mold having the shape of the final product. Compressed air is then injected into the preform, which then assumes the shape of the mold .

Extrusion Blow Molding

Extrusion blow molding can be used to process many different polymers, including polyethylene, polyvinyl chloride, polypropylene, and others. The process begins with traditional downward extrusion of the tube. When the tube reaches the desired length, the mold is closed, grab and hold the bottleneck end open, and pinch the bottom end closed. A blow pin is then inserted into the bottleneck end of the heat pipe to create a threaded opening and the tube is inflated within the mold cavity. When the mold is completely cool, open it, pop out the bottle, and trim away any excess plastic from the neck and bottom areas.

Stretch Blow Molding

Stretch blow molding, or injection stretch blow molding, can be thought of as a type of injection blow molding. Like injection blow molding, the preform is formed separately by an injection process. Then, the fabricated preform is transferred to a separate mold to form the final product. However, unlike injection blow molding, the preform is stretched and expanded to a predetermined dimension by a rod. After stretching, the preform is inflated to form the final shape of the product. Stretching helps improve the mechanical strength of the final product. This can be completed as a one-stage or two-stage process.

Advantages of Custom Blow Molding

The products we produce are completely customizable. The main advantages are as follows.

Materials

PUR

PVC

Large Production Volume

High-volume parts can be produced quickly, a largely automated process

Complex Part Geometry

Blow molding makes it easy to create parts with complex geometries that cannot be made using traditional injection molding or extrusion.

Low Tooling Costs

The pressure used to form the product is lower compared to traditional injection molding, resulting in lower processing costs.

Common Blow Molding Materials

We offer a wide range of materials for you to choose from,Here's an introduction to the characteristics, benefits, and drawbacks to resins commonly used in blow molding.

physical property	HDPE	LDPE	PP	PVC	PET	ABS
Density	0.95 g/cc	0.92 g/cc	0.90 g/cc	1.30 g/cc	1.30 g/cc	1.20 g/cc
Low Temp	-75°F	-80°F	0°F	-20°F	-40°F	-40°F
High Heat Deflection	160°F	140°F	170°F	150°F	160°F	190°F
Flex Modulus	1,170 mpa	275 mpa	1030 mpa	2,300 mpa	3,400 mpa	2,680 mpa
Hardness	Shore 65D	Shore 55D	Shore 75D	Shore 50D	Shore 80D	Shore 85D

Please contact us if you need custom colors, graphics, inserts and molds.

Blow Molding FAQS

1. How do I know if blow molding is the right process for my product?

A: The geometry of the part, the amount of parts needed, your tooling budget and the application the part is being used for will all influence your decision to blow mold the part.

2. What types of products are typically produced by blow molding?

A: Many everyday products are made by one of the blow molding processes. Plastic bottles,Milk jugs,Milk jugs,Automotive duct work,Automotive fluid reservoirs,Garbage bins,Beverage coolers etc.

3. What materials should I use for my project?

A: Different materials are used in different industries. If you have not selected a material for your application, we can provide assistance and guidance. Usually production samples are provided for confirmation, but final customer approval is required before mass production.

4. Do you offer extended molding services such as assembly, packaging or decorating?

A: We can provide some standard packaging services. If you need to provide customized packaging, decoration, or assembly services, please contact us.

5. How long does it take to build an blow mold?

A: 1-3 weeks on average, depending on the complexity and cavitations of the mold.

6. Is rotational molding environmentally friendly?

A:The production process of blow molding machines is relatively energy-saving and environmentally friendly, and the raw materials used are also commonly used low-cost materials, which are not only low-cost, but also environmentally friendly and recyclable. For example, recycled PET is mainly used for the production of some fibers, plastic bottles, and films, and reduces carbon emissions Plastic blow molding is more energy efficient and environmentally friendly than glass blowing.