Blow Molding Services
The hollow plastic products we often use, such as beverage bottles, cosmetic bottles, medicine bottles, and oil drums, are all made by injection blow molding or extrusion blow molding. So how do we choose? How to create higher quality blow molded products?

Blow Molding Services

Blow molding is a plastic molding process for rapid production of hollow structure products. Many products in life will choose injection blow molding for packaging, such as water bottles, oil drums, children's toys, etc. This is an economical and efficient plastic molding process. It is also suitable for mass production of plastic products.

Mulan MFG has been engaged in the production of blow molding parts for more than 15 years. It has two large blow molding manufacturing bases that produce small injection blow molding parts, such as medical test tubes, cosmetic bottles, drinking water bottles, etc. And large-scale extrusion blow molding products, such as insulation barrels, oil drums, car water tanks, tool boxes, etc.

Different Solutions For Blow Molding

● Injection Blow Molding

Injection blow molding is to use an injection molding machine to preform plastic parts before blow molding, and then use an automated blow mold for shaping and cooling. By integrating the two into a whole through automated equipment, a complete blow molding product can be obtained by one operation. It is better than extrusion blow molding to achieve precise details of the parts that are not blown. For example, the thread of the mineral water bottle is not affected by blow molding, and a smooth surface and accurate thread sealing effect can be obtained.

● Extrusion Blow Molding

But for large products, we would recommend that you use extrusion blow molding to generate thermoplastic tubular materials with a predetermined diameter and wall thickness through plastic extrusion equipment. After the thermoplastic tubular materials are softened by heating, they are shaped by a closed mold and the inner cavity is subjected to high pressure. Inflate the material to closely fit the surface of the mold cavity and keep it consistent with the product shape and structure in the design. However, blow molding cannot create products with complex structures and high precision requirements, and is usually used in packaging or products that are not demanding.

Industry Application
Food & Medical
Military & Aerospace
Automobile Industry
Energy & Industry

Why Choose Mulan MFG ?

Mulan MFG produces millions of plastic blow-molded container products every year, ranging from 1ml daily necessities packaging to 50L large oil storage drums, all within our manufacturing capacity. And we ensure that the products can maintain consistent weight, shape, volume, uniform wall thickness, and strict tolerance standards, which have been recognized by buyers from different industries around the world.

● Accurate Dimensional Tolerance

● Uniform Wall Thickness

● Very Flat Mold Parting Line

● Customizable Surface Pattern And Logo

● Customizable Surface Printing And Spraying

● Brand New Materials, No Recycled Materials

● Automated Manufacturing Line, Saving Labor Costs

● Save Material Waste As Much As Possible

● Minimize The Overflow Of Remaining Material As Much As Possible

Blow Molding Material Solutions

At Mulan MFG, we provide a variety of plastic materials to make blow-molded products. Injection blow molding is composed of small plastic particles, while blow molding uses hollow plastic pipes, but the functional type and composition of the materials are the same.

● LDPE

● HDPE

● PET

● PP

● PVC

Application Of Blow Molding

Blow molding is widely used by global buyers in various industries to efficiently manufacture hollow and thin-walled plastic products of various sizes and shapes.

 

● Drinking Water Bottle

● Chemical Bottle

● Boat

● Floating Object

● Kickboard

● Water Tank

● Water Tank

● Oil Drum

● Fitness Equipment

● Sampan

● Oil Storage Barrel

● Kayaking

● And See More Apps

What Is Blow Molding Process?

Blow molding is a process in which a hollow product formed by the expansion of a hot-melt plastic tube closed in a mold by means of gas pressure.

The blow molding process was used to produce LDPE vials in World War II. In the 1950s, with the birth of HDPE materials and the development of blow molding machines, the blow molding process was widely used and the technology was upgraded.

According to the different plastic blank tubes, it can be divided into extrusion blow molding, injection blow molding, stretch blow molding and multi-layer blow molding.

What Is The Difference Between Blow Molding And Injection Molding?

The main difference between injection molding and blow molding is the types of products that can be produced.

Generally, blow molding is the manufacture of hollow containers, such as bottles, pots, barrels and so on. There is no injection port on the surface,

Injection molding is used to produce solid parts. The plastic granular material is first melted, and then injected into a closed mold under high pressure for shaping. There will be traces of the injection port on the surface.

Is Blow Moulding Expensive?

Blow molding will be more cost-effective than injection and rotational molding.

Generally speaking, the production cost of a product needs to refer to several factors, such as part structure design, product quantity, product material selection, and product application functionality. After a comprehensive analysis, we choose the most reasonable cost manufacturing process.

Blow molding materials are relatively small, but for hollow structure parts, the structure is not complicated. When mass production is required, blow molding must be cheaper and more efficient than other plastic molding processes.

Where Is Blow Moulding Used?

Blow molding is widely used in the production of hollow structure products, such as: water bottles, oil drums, chemical turnover barrels, floats, medical reagent bottles, etc.

Injection blow molding is suitable for small container production, and stretch blow molding is suitable for medium and large-volume container products.

However, the surface effect of injection blow molded products is better than stretch blow molding, and can be highly transparent and flat. Drinking water bottles are the most typical injection blow molding.

What Are The Disadvantages Of Blow Moulding?

Blow molding has many limitations due to the molding principle, so there are a few points that should be paid attention to when designing blow molding products:

● Only limited to hollow structural parts.

● The wall thickness is thin and the strength is low.

● By adding other materials in the multilayer part, the effect of blocking sound and heat sources is increased. (So not recyclable)

● A second trimming is required to remove burrs and excess material.

● Only for thermoplastics