Hot Runner For Injection Moulding

Hot Runner For Injection Moulding (referred to as hot runner) is an advanced gating system technology in the injection mold gating system. It uses heating devices (such as heating coils, heating rods) to continuously insulate the plastic melt in the main runner, sub-runner and gate, keeping the melt in a molten state at all times, without cooling and solidifying together with the product like traditional cold runners. Its core advantage is eliminating cold runner waste (traditional cold runner waste accounts for 15%-30% of injection raw materials), realizing "zero-waste injection molding", while improving product molding precision and production efficiency. It is widely used in high-volume, high-precision injection molding scenarios (such as auto parts, electronic connectors, medical devices).

P&M Hot Runner For Injection Moulding Introduction

A、Classification of Hot Runner For Injection Moulding

1. Classification by Heating Method

（1）Internal-Heated Hot Runner

Structural Features: Heating elements (such as heating rods, heating tubes) are directly embedded in the runner, in direct contact with the melt, with high heat transfer efficiency (thermal efficiency above 85%); the runner diameter is small (usually 3-8mm), suitable for small-batch, high-precision products;

Advantages: Fast heating speed (only 5-10 minutes to heat from room temperature to 250℃), high temperature control precision (±1℃), and fast response to melt temperature changes;

Disadvantages: Heating elements are easily corroded or worn by the melt (especially for corrosive plastics such as PVC), with high maintenance costs;

Applicable Scenarios: High-precision injection molding of engineering plastics (PA, PC, POM), such as electronic connectors, precision gears.

（2）External-Heated Hot Runner

2. Classification by Gate Type

（1）Valve-Gated Hot Runner

（2）Open-Gated Hot Runner

B、Design Points of Hot Runner For Injection Moulding

1. Runner Size Design

2. Temperature Control Design

3. Vent Design

P&M Hot Runner For Injection Moulding(Specification)

P&M Hot Runner For Injection Moulding Feature And Application

Application Advantages of Hot Runner for Injection Molding

Compared to traditional cold runners, hot runners have significant technological and economic advantages:

1. Reduce raw material waste and save costs

Traditional cold runner waste accounts for 15% -30%, while hot runner achieves "waste free injection molding", increasing raw material utilization to over 95%; Taking a product with an annual output of 1 million pieces and 20g of waste per piece as an example, using a hot runner can reduce waste by 20 tons (1 million x 20g=200000g=20 tons). Calculated at a raw material cost of 20 yuan/kg, the annual cost savings are 400000 yuan (20 tons x 1000kg/ton x 20 yuan/kg=400000 yuan);

Reduce the process and equipment investment of waste recycling, crushing, and re granulation, and lower labor and energy consumption costs (the energy consumption of the recycling process is about 0.5 kW · h/kg, and the hot runner can completely eliminate this energy consumption).

2. Improve Product Quality and Production Efficiency

Quality improvement: The temperature of the hot runner melt is stable, avoiding problems such as uneven shrinkage and high internal stress caused by temperature fluctuations in the cold runner melt; Improve the dimensional accuracy of the product by 10% -20% (such as reducing the dimensional tolerance from ± 0.1mm to ± 0.08mm), and reduce the deformation rate by more than 30%;

Efficiency improvement: Save time on cold runner cooling and waste cleaning, shorten molding cycle by 20% -40% (such as traditional cold runner cycle of 10 seconds, hot runner cycle can be shortened to 6-8 seconds); After adopting a hot runner, the multi cavity mold can achieve synchronous filling and increase production efficiency by more than 50%.

3. Adapt to Complex and Precision Injection Molding Needs

Hot runner can achieve one-time injection molding of multi cavity and complex structural products (such as multi cavity electronic connector molds, with a number of cavities up to 64 or more), and the consistency of each cavity product is good (weight deviation ≤ 2%);

For thin-walled and micro products (such as medical catheters with a wall thickness of 0.1-0.3mm), the hot runner can provide stable melt pressure and temperature, avoiding the problem of insufficient filling caused by insufficient melt pressure in the cold runner. The qualification rate has increased from 70% to over 95%.

Customization Process

Factory&About US

NingBo Plastic Metal Product Co.,Ltd (P&M) is located in Yuyao, the so-called Mould City, Plastic Kingdom, in the southern tip of Hangzhou Bay Bridge,north of Shanghai, the east of Ningbo Port,tight double line of State Road 329 on land, sea and air trafic into a network to facilitate transport.

By the abundant technical strength,scientific management methods and good after-sales service, product deeply trusted and welcomed by customers from all over the world. P&M holds improved system of development and production, to achieve mold design, plastic products manufacturing and automatic production. Our main products is design and manufacturing of plastic mold, plastic product, metal product. 90% products of our enterprise are exported to America, Europe, Germany, Japan, Australia, etc. For many years, the company has been committed to the research of raw materials. The company has its own trademark and dozens of patents, providing more convenient technical support for mold making and product production. P&M started domestic business from 2008,named Shundi Mould Factory. And opened the international market from 2014. We always adhere to the principles of quality first and time first. While providing customers with the highest quality products, try to maximize the production efficiency and shorten production time. We are proud to tell every customer that our company has not lost any customer since its establishment.If there is a problem with the product, we will seek a solution actively and take responsibility to the end.

P&M adheres to market-oriented to the quanlity of life and focus on quality service and continuous development of new products,determined to establish a better corporate image,and our friends at home and abroad to carry a wide range of business exchanges and cooperation, create brilliant.

Packing

Packaging according to your needs

1. By air ,it takes 3-7 days for delivery.

The goods can be shipped by DHL , Fedex , UPS .

2. By sea ,the delivery time is based on your port.

To South East Asian Countries takes about 5-12 days.

To Middle east countries takes about 18-25 days.

To European countries takes about 20-28 days.

To American countries takes about 28-35 days.

To Australia takes about 10-15 days.

To African countries takes about 30-35 days.

P&M Bike parts, centered around children, balances safety, health, and fun, aiming to add a bright color to children's beautiful childhood. We look forward to working together with you to serve our children.

The path of a child's growth is paved with bricks and tiles.

FAQ

1.Who are we?

We are based in Zhejiang, China, start from 2014,sell to North America(30.00%),Southern Europe(10.00%),Northern Europe(10.00%),Central America(10.00%),Western Europe(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%). There are total about 51-100 people in our office.

2.How can we guarantee quality?

Always a pre-production sample before mass production;

Always final Inspection before shipment;

3.What can you buy from us?

Mould, Plastic Product, Metal Product, Dental Product, CNC machining.

4.Why should you buy from us not from other suppliers?

We main do all kinds of 3d design, 3d printing and plastic metal molds tooling and products. We have our own engineer and factory. One-stop supply: 3d design - 3d printing - mold making - plastic injection.

5.What services can we provide?

Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU;

Accepted Payment Currency: USD, EUR;

Accepted Payment Type: T/T,L/C,PayPal,Western Union,Escrow;

Language Spoken:English,Chinese,Spanish,French,Russian.

6.What are the characteristics of your service?

1. Your inquiry related to our products or prices will be replied within 24 hours.

2. Well-trained and experienced staffs to answer all your enquiries in fluent English.

3. Offering the support to solve the problem in the application or selling period.

4. Competitive prices based on same quality.

5. Guarantee samples quality same as mass production quality.