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How to Choose PET Bottle Preform Mold

Updated on 2024-04-17
FORAY

How to Choose Pet Bottle Preform Mold

The preform mold is an indispensable and important component in the plastic bottle molding process. If you plan to expand into a new bottle molding business, choosing a high-quality preform injection mold is necessary.

There are many preform mold suppliers around the world, so choosing the right preform injection mold is not an easy task. In this article, we will try to clarify what we should pay attention to when choosing a preform mold suitable for our needs.

 

Article Directory

  1. Introduction to PET Bottle Preform Mold
  2. Material Requirements for Pet Bottle Preform Molds
  3. What Types of Preform Molds Are There?
  4. How Much Does a Plastic Bottle Mold Cost?
  5. What Should You Pay Attention to When Choosing a Pet Bottle Preform Injection Mold?
  6. 8 Steps to Buy Pet Preform Molds
  7. Conclusion

 

Introduction to PET Bottle Preform Mold

A bottle preform mold is a specialized mold used in the manufacturing of plastic bottles or containers through a process called injection molding. PET bottle preform molds are designed using 3D computer graphics and can produce various bottle preforms according to customer requirements, such as shampoo bottles, medicine bottles, soy sauce bottles, mineral water bottles, carbonated drink bottles, etc.

Characteristics of PET mold:

1. Multi-cavity points: There are mature technologies from 4 to 32 cavities, simplified hot runner work, and low cost.

2. High efficiency: using a simplified dispensing hot runner, no glue waste, and the cycle can reach 5 seconds.

3. Long service life: The mold cavities are all made of high-quality mold steel, and the mold guide posts and bushings adopt oil-free lubrication, which has the strong advantage of being pollution-free and having a service life of tens of millions of times.

4. Special design of the blade: The swing-ring blade adopts a split structure, which allows the blade to be positioned accurately, perfectly overcoming the defects of inferior products such as poor overall blade positioning accuracy and easy damage.

 

Material Requirements for Pet Bottle Preform Molds

1. High temperature performance

The material of the preform mold should have high anti-tempering stability to ensure that the mold has high hardness and strength under the working temperature.

2. Corrosion resistance

When some plastic bottle preform molds are in operation, the surface of the mold cavity will be eroded by decomposition gas, resulting in increased surface roughness and aggravated wear and failure.

3. Heat and cold fatigue resistance

During the working process, it will be in a state of repeated heating and cooling, which can easily lead to mold failure. Therefore, this type of mold must have high resistance to cold and heat fatigue.

 

What Types of Preform Molds Are There?

According to the number of cavities, preform injection molds can be divided into single-cavity and multi-cavity.

Single-Cavity Preform Molds:

Advantages:

  • Flexibility: Single-cavity molds offer flexibility in production, allowing manufacturers to easily change preform designs or sizes between production runs.
  • Quality Control: They enable meticulous control over each individual preform, ensuring consistent quality and reducing the risk of defects.
  • Lower Initial Investment: Generally, single-cavity molds require a lower initial investment compared to multi-cavity molds, making them more accessible for smaller-scale production or niche applications.

Disadvantages:

  • Lower Production Efficiency: Due to producing only one preform per cycle, single-cavity molds have slower production rates and lower output compared to multi-cavity molds.
  • Higher Unit Costs: Higher production costs per preform due to slower cycle times and reduced efficiency can lead to higher overall production costs.

 

Multi-Cavity Preform Molds:

Advantages:

  • High Production Efficiency: Multi-cavity molds can produce multiple preforms in a single molding cycle, significantly increasing production efficiency and output volume.
  • Lower Unit Costs: With higher output per cycle, multi-cavity molds can achieve lower production costs per preform, enhancing overall cost-effectiveness.
  • Increased Speed: They offer faster production rates, reducing cycle times and increasing throughput, which is beneficial for meeting high-demand production schedules.

Disadvantages:

  • Complexity and Maintenance: Multi-cavity molds are more complex in design and operation, requiring precise maintenance and potentially higher upkeep costs.
  • Less Flexibility: Changing preform designs or sizes can be more challenging and time-consuming compared to single-cavity molds, limiting flexibility in production.

 

How Much Does a Plastic Bottle Mold Cost?

The cost of preform molds varies based on factors like size, material, complexity, quantity, and manufacturer. Refer to our listed price range for preform molds to guide your selection process.

Type Minimum Price Maximum Price Average Price
Standard $5,000 $20,000 $10,000
High Precision $15,000 $50,000 $30,000
Multi-Cavity $25,000 $100,000 $60,000
Customized $30,000 $150,000 $80,000

If you want to buy preform molds in China, the final price should include customs clearance fees, taxes and shipping costs.

Whether you are a small business owner or an industrial manufacturer, don't just focus on price, you should also consider the after-sales service.

 

What Should You Pay Attention to When Choosing a Pet Bottle Preform Injection Mold?

1. Plastic raw materials: Different plastic raw materials have different processing variables, and those processing variables will affect the choice of hot runner system.

2. Product weight: Products of different weights have completely different requirements for hot runner.

3. Nozzles: Nozzles can generally be distinguished by size, temperature distribution, physical properties, materials used (copper, steel, etc.), as well as ease of maintenance and price.

4. Mold: How many cavities are there? What is the distribution distance of the nozzles? What kind of materials are processed? These are all mold elements related to the optional hot runner system.

5. Cycle time: Rapid production cycle means increased requirements for nozzles. For example, the nozzle needs to deliver heat accurately and be durable.

6. Gate: For point gates, in order to maintain a good thermal balance in each molding cycle, the hot nozzle tip must have the functions of melting materials and cooling and sealing. The valve gate uses mechanical methods to seal the gate.

7. Runner: The use of hot runner system avoids the production of material handles, thus saving raw materials and eliminating the previous process of removing material handles by hand, robot or other methods.

 

8 Steps to Buy Pet Preform Molds

If you are not clear about the steps to buy preform molds, then here are some suggestions we make:

Step 1. Consultation

We will recommend the most suitable preform mold for you according to your needs

Step 2. Quotation

We will provide you with the most reasonable quotation based on the cost required for the preform mold.

Step 3. Process evaluation

Both parties carefully evaluate the details of the order (technical parameters, specifications and commercial terms) to exclude any misunderstandings.

Step 4. Place an order

If you have no questions, we will send you PI (Proforma Invoice), and then we will sign a contract with you.

Step 5. Production

We will arrange the production of the preform mold immediately after receiving your contract and deposit. During the production process, we will update and inform the preform mold buyer about the latest news of the production.

Step 6. Inspection

The entire preform mold production process will be subject to regular inspections and strict quality control. To ensure that it can work properly.

Step 7. Delivery

After confirmation by the preform mold buyer, we will arrange shipment according to the contract terms.

Step 8. Support and service

We will provide professional technical support and 24/7 free customer service via phone, email, Skype, WhatsApp, online live chat, remote service. We also provide door-to-door service in certain areas.

 

Conclusion

Plastic bottle preforms will continue to evolve in the coming years. PET preform molds must meet the ever-changing demands of the manufacturing environment and competitive markets. Therefore, it is important to choose a professional embryo mold supplier. If your company needs to customize high-quality preform molds, then you can choose to contact us. We will provide you with first-class service!

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