Micro-Precision Injection Moulding

Micro-Precision Injection Moulding refers to an advanced injection molding technology that realizes the molding of plastic parts with extremely small sizes (usually part weight ＜1g, feature size ＜0.1mm) or extremely high precision requirements (dimensional tolerance ≤±0.001mm, geometric tolerance ≤±0.0005mm) through high-precision injection equipment, dedicated molds and strict process control. Its core feature is breaking through the precision limitations of traditional injection molding, capable of forming complex parts with microstructures (such as microchannels, microgear tooth thickness ＜0.05mm), with part weight deviation ≤±0.005g and surface roughness Ra≤0.02μm. Compared with ordinary precision injection molding (tolerance ±0.01mm), micro-precision injection molding achieves an order-of-magnitude improvement in size control, weight consistency and microstructural molding capabilities. It is widely used in fields such as microelectronics, minimally invasive medical devices, and aerospace micro-components, and is a key manufacturing technology for realizing miniaturization and integration of high-end products.

P&M Micro-Precision Injection Moulding Introduction

1 Core Characteristics of Micro-Precision Injection Moulding

1. Ultra-Small Size and Ultra-High Precision Control

Dimensional Precision: Capable of stably forming parts with feature sizes ＜0.1mm (such as medical catheter inner diameter 0.08mm, microelectronic connector pin width 0.06mm), with dimensional tolerance controlled within  ±0.001mm, far exceeding the ±0.01mm of ordinary precision injection molding;  through closed-loop control injection molding machines (position repeatability  ±0.0001mm), ensuring dimensional consistency of parts in the same batch (deviation ≤±0.0005mm);

Geometric Precision: Strict control of part geometric tolerances, such as microgear pitch cumulative error ≤ ±0.0008mm, microchannel coaxiality ≤±0.0005mm, achieved through ultra-precision machining of mold cavities (precision ±0.0003 mm) and real-time adjustment of pressure/temperature during injection molding;

Weight Precision: For micro-parts with weight ＜0.5g (such as medical microvalves, micro-sensor housings), weight deviation is controlled within  ±0.005 g, achieved through precise control of injection volume (minimum injection volume up to 0.001cm³) and pressure-holding process, avoiding functional impact of parts due to weight fluctuation.

2. Complex Microstructure Molding Capability

Micro precision injection molding can achieve microstructures that are difficult to form with traditional injection molding, meeting the functional requirements of high-end products

Microchannels and microporous structures: Microchannels with a cross-sectional size of 0.05 × 0.05mm can be formed (used for biochips and micro heat exchangers), with a minimum microporous diameter of 0.02mm (such as medical atomizer nozzles), and smooth pore walls (Ra ≤ 0.01 μ m), without burrs or blockages;

Micro gears and micro transmission structures: Micro gears with a molding modulus ≤ 0.01 (tooth thickness 0.03-0.05mm), tooth surface roughness Ra ≤ 0.008 μ m, transmission accuracy up to ISO 1328 Grade 10 or above, suitable for the transmission needs of micro motors and precision instruments;

Microarrays and microtexture structures: Microarray protrusions with a spacing of 0.01-0.03mm (such as micro lens arrays for optical components) or microtextures with a depth of 0.005-0.01mm are formed on the surface of the part, with a structural replication accuracy of ≥ 95% and no deformation or loss.

3. High Adaptability of Materials and Processes

Micro precision injection molding requires customized matching process parameters based on different material characteristics and part functions:

Accurate material selection: Common materials include LCP, POM, and PC to avoid impurities affecting molding accuracy;

Refinement of process parameters: The injection speed needs to be precisely controlled within 1-5mm/s to avoid microstructure deformation caused by excessive melt shear; Gradual adjustment of holding pressure, setting differentiated holding pressure for different areas of the parts to compensate for local shrinkage;

Strict environmental control: The production environment needs to be constant temperature, humidity, and dust-free to avoid temperature fluctuations that may cause mold thermal deformation or dust adhesion affecting the surface quality of parts.

II Production Process of Micro-Precision Injection Moulding

1.Product Design and Mold Development

(1) Product Design

Structural design: Draw a 1:10 enlarged 3D model using CAD software, with a focus on annotating microstructure dimensions and positional tolerances; Adopting topology optimization to reduce redundant structures and avoid stress conflicts between microstructures and main structures;

(2) Mold development

Mold material: The mold cavity is made of powder metallurgy high-speed steel or single crystal diamond to ensure wear resistance and surface accuracy, and the mold life is ≥ 100000 times;

Cavity machining: using ultra precision machining techniques such as slow wire EDM, focused ion beam machining, and diamond tool turning; Polishing the surface of the cavity to ensure the accuracy of microstructure replication;

2. Raw Material Preparation and Injection Molding

3.Post-Processing and Quality Inspection

P&M Micro-Precision Injection Moulding(Specification)

P&M Micro-Precision Injection Moulding Feature And Application

1. Microelectronics and Semiconductor Industry）

Core Requirements: Ultra-small size, high insulation, high temperature resistance, adapting to components such as chip packaging and micro-connectors.

2. Medical Minimally Invasive Device Industry

Core requirements: biocompatibility, high-precision microstructure, sterility, adaptability to minimally invasive surgical instruments and diagnostic equipment.

3. Aerospace and Micro-Instrument Industry

Core requirements: high reliability, resistance to extreme environments, lightweight, suitable for micro sensors and navigation components.

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.