Blowing Mold

Inox Cast is a professional manufacturer and supplier of blowing mold since 1997. We offer customized capacity, easy to operate, and cost-saving blowing mold.

  • High-quality blowing mold
  • Widely used in different industries
  • 20+ years of manufacturing blowing mold
  • 24/7 immediate response to inquiries

Why Inox Cast is a Professional Manufacturer of Blowing Mold

Inox Cast has more than 20 years of experience in manufacturing blowing molds. Our factory is equipped with advanced technology and modern production equipment. Therefore, you can guarantee that we can provide you the best quality products. We also have expert engineers for prototype, design, and manufacture your blowing molds. Inox Cast also supply blowing molds to different countries around the world. Message us for more information.

Blowing Mould Plastic Parts
Blowing Mould Plastic Parts

Our blowing mould plastic parts includes plastic mold types such as prototype molds, insert overmolds, and silicone compression molds.

Die Head for Film Blowing Machine
Die Head for Film Blowing Machine

We manufacture die head for film blowing machine with high-quality, good performance, and high reliability.

Blowing Mold Maker
Blowing Mold Maker

This blowing mold maker is widely used for oil bottle. It has a cold runner and hot runner characteristics.

Custom Blowing Mould Plastic Injection
Custom Blowing Mould Plastic Injection

We offer custom blowing mould plastic injection with professional and newest design, competitive price, and low MOQ.

500ml Plastic Bottle Blowing Moulds
500ml Plastic Bottle Blowing Moulds

Inox Cast manufactures 500ml Plastic Bottle Blowing Moulds for industrial and commercial industries. It comes with customizable sizes and designs.

4L HPDE Bottle Blowing Mold
4L HPDE Bottle Blowing Mold

Our 4L HPDE Bottle Blowing Mold comes with single cavity. It is manufactured using steel materials for durability.

Customized Bottle Blowing Molds
Customized Bottle Blowing Molds

Our customized bottle blowing molds are plastic injection molds for making plastic bottles. It features automatically running and HASCO standard.

PETPPPLA Bottle Blowing Mould
PET/PP/PLA Bottle Blowing Mould

Inox Cast is a popular manufacturer of PET/PP/PLA Bottle Blowing Mould with 2 cavities, customized shapes, and sizes.

HDPE Blowing Bottle Mold with 3 Cavities
HDPE Blowing Bottle Mold with 3 Cavities

We specialize in making HDPE Blowing Bottle Mold with 3 Cavities for injection mould, water bottle mould, oil bottle mould, preform mould, and more.

Plastic Blowing Injection Led Bulb Mould
Plastic Blowing Injection Led Bulb Mould

This injection moulding offers precision machining for any plastic products. It comes with product and mold design as well as standard and OEM services.

Custom Plastic Pet Water Bottle Blowing Mold
Custom Plastic Pet Water Bottle Blowing Mold

These blowing molds are widely used for making plastic crate, water bottle, laundry basket, plain bucket, plastic chairs, and more.

Mulity Cavity Plastic Bottle Extrusion Blow Mold
Mulity Cavity Plastic Bottle Extrusion Blow Mold

Our multi cavity plastic bottle extrusion blow molds are certified by RoHS, SGS, and other international quality standards.

Inox Cast Blowing Mold

Inox Cast Blowing Mold

We are a certified blowing mold manufacturer based on Hong Kong. Inox Cast is one of the largest manufacturer of blowing mold for more than 20 years. Throughout the years, we are dedicated to providing customers with the best products and services.

In our factory, we are equipped with advanced engineering system for our production. We have CAE/CAM/CAD system to guarantee you an effective machining, evaluation, and control of product design throughout the whole mold production.

Aside from that, we are also integrated with modern design tool including Pro/E, SolidWorks, AutoCAD, mold flow mold advisor, complete CNC machines, and more. Thus, you can assure that we can provide you the highest quality products.

At Inox Cast, we have different types of blowing molds. Our wide range of blowing molds include liquid line blowing mould, slipper air blowing mold, water bottle blowing mold, and more. You can surely find the right blowing mold for your applications.

Additionally, we offer OEM services to your blowing mold orders. We can custom-made your blowing molds based on your exact needs, specifications, drawings, or samples. We can also personalize your orders with your logo to promote your brand.

We also have expert engineers for prototype, design, and manufacture your blowing molds. Inox Cast also supply blowing molds to different countries around the world. For your business or project, choose Inox Cast as your blowing mold manufacturer!

Request a quote for your next blowing mold orders!

Blowing Mold: The Ultimate FAQ Guide

If you have any question about blowing mold, you will find the answer right here.

This is because this guide covers all information you need to know about this blow molding tooling system.

Keep reading to learn more.

1.  What Is Blowing Mold?

Blowing mold is a machine that is used to form and join together hollow plastic parts making them bottles.

You can use it to make plastic bottles or other void shapes.

Blowing mold is also used in the automotive industry in the production of auto parts.

A Blowing Mold Machine

A Blowing Mold Machine

2.  Is Blowing Mold Suitable For All Plastics?

Blowing mold is suitable for plastics that do not quickly degrade upon heating.

Blowing mold is appropriate for thermoplastics.

Most but not all plastics can be made using the blow molding process.

The plastics manufactured from blowing mold include; shampoo bottles, water bottles, plastic cups, plastic buckets, mugs, milk bottles, and many other plastic containers.

3.  Which Features Should You Look For In Blowing Mold?

  • It should have a high impact on strength
  • A blowing mold should be able to resist chemicals perfectly
  • Blowing mold should have good electrical insulating properties
  • Ultraviolet resistance
  • Temperature toughness

4.  What Is The Best Blowing Mold Material?

The materials best for blowing mold are either mild steel or aluminum.


Aluminum is light, soft, ductile, corrosion-resistant, and very conducive to heat and electricity.

Aluminum can also be easily colored to provide a highly decorative appearance.

Compared to other materials used for blowing mold, aluminum is cheaper in tooling costs.

Aluminum is easy to repair and change since it is a soft material.

However, aluminum is not suited for high volume or long production runs.

Aluminum is also not suitable for highly detailed features.

An Aluminum Mold

An Aluminum Blow Mold


Steel offers longer life to the mold and is capable of producing millions of high-quality parts.

Besides, steel has an brilliant stability of machinability, strength, and cost.

Steel tools have lower maintenance costs which reduce operational costs.

Steel offers more finishing options, some finishes can only be produced with steel molds.

A Steel Blow Mold

Steel Blow Mold

Steel molds are however expensive, and difficult to repair when damaged during the production process.

Steel molds are more prone to defects and take longer to heat and cool, slowing production time.

5.  Which Products Can You Make Using Blowing Mold?

You can make several products using the blowing mold, they include; shampoo bottles, watering cans, coolers, water bottles, stadium seating, jerry cans, milk bottles, and containers, plastic cups, plastic buckets, and other plastic containers.

Products Made From Blowing Mold Process

Products Made From Blowing Mold Process

6.  What Are The Benefits Of Blow Molding?

  1. It is a revolutionary form of technology – there is a transformation in the industrial sector brought by blow molding, companies use it broadly to meet consumers’ needs for plasticware.

This plastic production method brought about a lot of advantages like fast manufacturing and high-volume outputs, meaning one can produce a lot of plastic containers.

  1. Makes numerous commodities – engineers can create several applications and designs which results in multiple uses through blow molding.

Blow molding has allowed for products creation such as fuel tanks, seat support for vehicles, flower pots, and toy wheels.

  1. It comes with low costs – extrusion blow molding uses a lower pressure level.

This means machinery costs are low, hence making it easier and more cost-efficient to mold external threads or open-ended and massive parts, which can be cut up by opening a closed molding.

Using this generation will let you to lessen labor costs.

  1. It allows for multiple production methods – blow molding uses various processes to create final products.

Extrusion blow molding works similar to traditional glass blowing, in which materials are blown through a long tube, creating products like light bulbs.

As for injection blow molding, it produces a lot of containers, where melted polymers are injected into the blow mold instead of being blown through by air.

  1. It promotes a higher level of productivity – blow molding is now universally used with plastic production.

It has allowed for widespread growth in production competencies, permitting manufacturers to produce extra portions in only a quick period.

Making use of machines that accept 3D moldings.

  1. It offers the benefits of automation – Blow molding was taken to greater heights when 3D blow molding started.

3D blow molding is an automated production technique that permits minimal flash around the material, seamless part incorporation, and increased production speed.

A 3D Blow Mold Model That Increases Production Speed

A 3D Blow Mold Model That Increases Production Speed

7.  What Are The Limitations Of Blow Molding?

Blow molding has taken the plastics arena to another stage with fast production.

That is, excessive volumes of manufacturing that allowed us to produce receptacles at a lower cost for consumers in the world.

However, it also comes with some disadvantages listed below;

  1. It relies mostly on petroleum

Blow molding depends on a lot of gallons of petroleum to be able to produce plastic products.

As oil is an essential factor in thermoplastics that are becoming automated.

And more streamlined, the generation has emerge as an ongoing risk to the diminishing oil supply within world.

  1. It impacts the environment greatly.

Blow molding relies so much on petroleum and is an essential part of producing a polymer, which can destroy the environment. Other than contributing to the collapsing oil resources, it makes plastic that does not decompose. It cannot get rid of the environmental risks its products deliver but will add to plastic production.

  1. It has numerous production techniques.

Blow molding would need more resources, the process could not be streamlined, thus requiring a lot of production methods.

  1. It comes with limited uses.

Blow molding is limited to hollow forms such as bottles and plastic containers.

Air pressure is critical to the technique and may come across difficulties with wall thickness that is tough to govern.

  1. Material precision creates waste.

Despite the fact that this technology already uses automation to produce large quantities of merchandise, it is nevertheless constrained to hollow forms.

Considering that thickness should be precise, containers with unique dimensions can result in wasted material.

8.  How Does Plastic Blow Molding Process Work?

The blow molding procedure entails mixing, melting, and pushing plastic to form it right into a tube known as a parison, which you use to make the part.

A mold is used to make the form you require. A mold has two halves that are closed around the molten parison.

Air is then blown into the inside of the parison to expand the molten plastic towards the mold surface.

The mold is chilled to set the plastic to the new form of the mold.

The molded plastic element is then eliminated from the mold, separate the product from excess parison fabric, then end the product.

How The Plastic Blow Molding Process Works

How The Plastic Blow Molding Works

9.  What Are The Main Parts Of Blow Mold?

The blow mold has several parts, they are;

1. The feed from the extruder – extruder is a machine made up of cylinders and barrels where plastics are heated.

The feed from the extruder is given as input into the blow molding machine.

2. Melted plastic – is an intermidiate for the making of void plastic components.

3. Extruder head – the melted plastic is sent to the extruder head and then passed through other channels.

4. Air tube – used to pressurize the air when the molten plastic enters the mold cavity and is about to bulge.

5. Parison – is a hot plastic with a tube shape with a hole at one end through which compressed air can pass.

6. Mold cavity – has patterns where you can deposit molten plastics and solidification takes place, then the final product is obtained.

10.  Which Industries Use Blowing Mold?

You can use blow molding in several industries which make plastic products such as;

  • Household and cleaning products
  • Automobile industry
  • Industrial and agricultural chemicals
  • Food and beverage
  • Medical industry
  • Personal care products

An Automatic Blowing Mold Machine

An Automatic Blowing Mold Machine

11.  What Should You Consider When Buying Custom Blowing Mold?

When buying a blowing mold, there are certain factors you should consider to ensure you purchase one that is effective and would last long.

Listed below are things to consider when buying blowing mold;

  1. Part design is one of the most important aspects of long-term molding success. Choose a mold with design parts that will work the best for you.
  2. A big mold can save you money. It might be a bit expensive, but it has more cavities which produce many products saving on time.
  3. Systematize mold characteristics to save time and money. Look for one with your preferences and standards like the location of things to avoid replumbing when it arrives.
  4. Choose the right color since the colors have to align with your brand. Blow molding allows for a lot of choices when it comes to colors.
  5. Proper risk management and anticipating potential issues are things you should consider and know you will handle issues if they arise.

12.  How Do You Care And Maintain Blowing Mold?

Mold tools are prone to damage and corrosion if you don’t maintain them properly.

The maintenance of molds starts from where you store the mold to how you use it.

Do a maintenance check on the mold regularly, even if it is working.

The following are some of the ways you should maintain a blowing mold;

  • The sliding part should be thoroughly cleaned and maintained.
  • After maintenance of the mold, make sure you make an anti-rust treatment.
  • Lubricate the mold with high-temperature grease.
  • The metal scraps and scales should go through a thorough clean-up.
  • Spray all molding surfaces with mold protection.
  • Check all safety switches for damage and correction function.
  • Clean the mold and service the parts well.

13.  Which Are The Common Defects When Using Blowing Molds?

The common defects when using blowing molds include;

  • Flow lines – this affects the appearance of the products.
  • Discoloration – this is where the finished products do not have a uniform color.
  • Flash – this is where a small flap of thin plastic material remains on the edges of a finished product.

Flash Defect

Flash Defect

  • Warping – this happens when different areas of the product cool and solidify unevenly.
  • Air pockets – this happens when air is trapped in a finished product hence altering the appearance.
  • Rocker bottoms – this is caused by insufficient cooling of the blown bottle before removing it from its mold.

Rocker Bottom Defect In Blowing Mold

Rocker Bottom Defect In A Blowing Mold Part

14.  Which Are The Common Surface Finishes For Blowing Mold?

The common surface finishes for blowing mold include;

  1. Semi-glossy finish
  2. Smooth and glossy finish
  3. Matte finish
  4. Textured finish
  5. Mold polishing tips

15.  What Are The Features Of Multi- Cavity Blowing Mold?

A multi-cavity mold has more than one cavity of the same part and produces more than one part per production cycle.

A multiple cavity mold is advantageous when you need many identical parts within a set time frame.

It produces more parts faster if you compare it to a single cavity mold.

A multiple cavity mold requires a more substantial upfront investment.

A multiple cavity mold is more cost-intensive since they require more material, labor, and energy resources.

A Multi Cavity Mold

A Multi Cavity Mold

Maintenance costs and risks are higher with multiple cavity molds.

If one cavity breaks or has a defect, the whole mold becomes unusable which can impact the whole production time.

A multiple cavity mold has a more substantial lead time as they take longer to create.

16.  Why Should You Buy Blowing Mold From China?

Buying blowing mold from China can be very advantageous.

Most people ship their products from China.

They are reliable when it comes to the manufacturing of products.

Here are some of the reasons you should buy blowing mold from china;

1. High output within a short time

Many manufacturers in China are known for producing many products within a short period. To ensure they do not take very long,they have many people working on the product.

2. Lower production cost

Mold manufacturers from China offer quality products with a low production cost. They offer low prices for quality products and also have very many discounts.

3. Fast access to opportunities and market

Buying from China will give you quick access to opportunities and markets.

You will be able to market your products locally and establish a supply chain providing you with access to a larger market.

17.  How Does Blow Molding Compare To Injection Molding?

Blow molding produces hollow containers such as bottles, injection molding produces solid pieces like plastic plates.

The costs of blow molding are relatively lower compared to injection molding.

Blow molding machinery costs are also low.

Blow molding is a one-piece construction meaning there is no need to connect part halves to achieve shapes that injection molding cannot produce.

Compared to blow molding, injection molding is detailed and is a highly engineered tooling with multi-cavity mold options.

More Resources:

Custom Die Casting

Plastic Die

Precision Mold

Customs Aluminum Mold

For all your blowing mold, contact us now.

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