Robot Part Injection Moulding

Robot Part Injection Moulding refers to a technology that produces various core and auxiliary parts of robots (such as structural parts, transmission parts, sensor housings, connection components, etc.) using customized injection molding processes. This process needs to combine the special requirements of robot parts for precision, strength, weather resistance, etc., and convert molten plastic into parts that meet the robot assembly standards and working condition requirements through exclusive mold design, precise material selection and optimized injection parameters. Compared with traditional mechanical processing, it can efficiently realize the mass production of parts with complex structures, and ensure the dimensional consistency and performance stability of parts, which is one of the key supporting technologies for the large-scale production of the robot industry.

P&M Robot Part Injection Moulding Introduction

A、Core Characteristics of Robot Part Injection Moulding

1. Ultra-High Precision Molding

Robot parts (such as joint transmission gears, precision connectors) have extremely high requirements for dimensional accuracy, usually requiring a tolerance of ±0.005mm, and some core parts even require micron-level accuracy. During the injection molding process, it is necessary to ensure that the parts can accurately match the robot assembly tolerance after molding through high-precision mold manufacturing (using H13 hot work mold steel, processed by a five-axis machining center, with mold cavity accuracy up to ±0.002mm), closed-loop control injection molding machines (real-time monitoring of injection pressure, speed and temperature, with fluctuation range controlled within ±1%) and online dimensional inspection (using laser diameter gauges and coordinate measuring machines to feedback dimensional deviations in real time), so as to avoid robot operation jamming or positioning errors caused by insufficient part precision.

2. Integrated Molding of Complex Structures

Robot parts often involve complex structural designs, such as connection bases with multiple sets of buckles, transmission housings with built-in reinforcing ribs, sensor brackets with special-shaped holes, etc. The injection molding process can realize the integrated molding of these complex structures through multi-cavity or composite mold design: for example, the robot joint housing can be injection-molded in one time without subsequent splicing, which not only reduces the number of parts (reduces 30%-50% of part types compared with traditional splicing processes), but also avoids structural weak points caused by splicing gaps, improves the overall rigidity of parts (bending strength increased by more than 20%), and reduces the complexity and cost of robot assembly.

3. Precise Matching of Material Properties

Robot working environments are diverse (such as high-temperature oil pollution in industrial workshops, high and low temperature alternation in outdoor scenarios, sterile requirements in medical scenarios), and different parts need to adapt to specific material properties: transmission parts need high wear resistance (such as PA66 material with glass fiber added, wear rate less than 0.001mm³/(N・m)); outdoor robot housings need UV aging resistance (such as PC/ABS alloy with anti-UV agent added, impact strength retention rate reaches more than 85% after 1000 hours of UV irradiation); medical robot parts need biocompatibility (such as medical-grade PEEK material, which meets the ISO 10993 biocompatibility standard). The injection molding process can accurately match the performance requirements of different robot parts through material modification and formula adjustment, ensuring that parts run stably for a long time under specific working conditions.

B、Production Process of Robot Part Injection Moulding

1. Part Requirement Analysis and Mold Design

First, it is necessary to deeply analyze the technical requirements of robot parts: clarify the functional positioning of the part in the robot (such as load-bearing, transmission, sealing), working environment parameters (temperature range, medium contact, load strength), assembly tolerance (provide detailed 2D/3D drawings, mark key dimensions and geometric tolerances) and output requirements (determine the number of mold cavities and service life). Based on the requirements, CAD/CAE software (such as SolidWorks, Moldflow) is used for mold design: the cavity and core need to reserve plastic shrinkage (such as 2.0%-2.5% for POM materials), and mold flow analysis is carried out to simulate the plastic filling process, optimize the gate position (avoid bubbles and shrinkage marks) and cooling water circuit layout (ensure uniform cooling of parts, with deformation controlled within 0.01mm); for precision transmission parts, positioning pins and guiding structures need to be set in the mold to ensure that the coaxiality of key holes after part molding is ≤0.003mm.

2.High-Precision Mold Manufacturing

Mold materials are selected according to part precision and output: the core cavity and core use H13 or S136 mold steel (H13 has strong wear resistance, suitable for mass production; S136 has excellent corrosion resistance, suitable for transparent parts or parts with high surface requirements), and the template uses P20 pre-hardened steel. The processing process requires multiple precision processes: first, use a five-axis machining center for rough and semi-finishing of the cavity to ensure the form and position tolerance ≤0.005mm; then use electrical discharge machining (EDM) to finish the complex cavity or narrow gap structure, with surface roughness controlled at Ra≤0.4μm; finally, perform mirror polishing (using diamond grinding paste, precision up to Ra≤0.012μm) and mold assembly. After assembly, a laser interferometer is used to detect the mold parallelism and coaxiality to ensure that the overall mold precision meets the part production requirements.

3. Injection Production and Process Optimization

Injection parameters are set according to the material characteristics of the part: for example, when producing robot joint gears (using PA66 + 30% glass fiber), the injection temperature is controlled at 260-280℃, injection pressure at 80-100MPa, holding time at 15-20s, and cooling time at 25-30s; when producing sensor housings (using PC materials), the injection temperature is 280-300℃, injection pressure at 90-110MPa to avoid internal stress causing the housing to crack. During the production process, the industrial Internet of Things (IIoT) system is used to collect injection molding machine parameters (temperature, pressure, time) and part size data in real time, and establish a correlation model between process parameters and part quality: when the part size deviation is detected to exceed 0.003mm, the system automatically adjusts the injection speed or holding pressure to realize the dynamic optimization of process parameters, ensuring that the part qualification rate is stable above 99.5%.

4. Part Post-Processing and Inspection

The parts after injection molding need targeted post-processing: for transmission gears, deburring (using ultrasonic deburring equipment to remove gate and parting surface burrs, with precision up to 0.001mm) and surface hardening treatment (such as nitriding treatment, surface hardness increased to above HV800 to enhance wear resistance) are required; for sensor housings, surface coating (such as vacuum sputtering coating to improve the housing's scratch resistance and electromagnetic shielding effect) is required. The inspection link adopts a combination of "100% inspection + sampling inspection": key dimensions (such as gear modulus, hole spacing) are fully inspected by a fully automatic coordinate measuring machine to ensure that each part meets the precision requirements; mechanical properties (such as tensile strength, impact strength) are sampled by batch (5-10 pieces per batch) and verified by a universal testing machine and impact testing machine; environmental adaptability (such as high and low temperature resistance, aging resistance) is simulated and tested by a high and low temperature chamber and aging test chamber to ensure that the parts can adapt to the robot working environment.

P&M Robot Part Injection Moulding (Specification)

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.