Safety Glasses Injection Moulding

Safety Glasses Injection Moulding refers to professional eye protection equipment that produces core protective structures such as frames and lenses (in some cases, lenses are composite reinforced layers after injection molding) through plastic injection molding processes, and has functions such as impact resistance, scratch resistance, and UV protection. Its core feature is using the injection molding process to realize the integrated or precise adaptation design of the frame and lens. The frame mostly uses impact-resistant polymer materials, and the lens meets protection standards (such as ANSI Z87.1, GB 14866, etc.) through material modification or coating treatment. Compared with traditional glass safety glasses (heavy, fragile) or ordinary plastic safety glasses (weak protection performance), injection-molded safety glasses combine lightweight, high protection and comfort. They are widely used in industrial production, laboratories, outdoor sports, construction and other scenarios to protect the eyes from foreign object impact, chemical splashing, UV radiation and other injuries.

P&M Safety Glasses Injection Moulding Introduction

A、Core Characteristics of Safety Glasses Injection Moulding

1. High Impact Resistance, Strong Protection

The core protection requirement of injection-molded safety glasses is to resist external impact, and their frames and lenses are specially designed and material-selected: lenses usually use polycarbonate (PC) or polyamide (PA) materials, with impact strength of more than 60kJ/m² (200 times that of ordinary glass), which can withstand the impact of a 16mm diameter steel ball falling freely from a height of 1.3m without breaking (meeting the GB 14866 impact resistance test standard); the frame uses TR90 or glass fiber reinforced PA66 materials, with elongation at break ≥30%, which is not easy to break even when subjected to severe impact, avoiding scratches on the face by fragments; some styles design buffer structures (such as elastic hinges) at the connection between the temples and the frame to further disperse the impact force and reduce the risk of eye and face injuries.

2. Integrated Multi-Functional Protection, Adapting to Complex Scenarios

In addition to basic impact resistance, injection-molded safety glasses can achieve multi-dimensional protection through process optimization: the lens surface is coated with a scratch-resistant coating (such as SiO₂ hard coating), with surface hardness above HB level (pencil hardness test), which is not easy to scratch in daily use, ensuring clear vision; coated with UV protection coating (UV400 level), which can block more than 99% of ultraviolet rays (UVA and UVB) with wavelengths of 280-400nm, adapting to outdoor work (such as construction, welding) scenarios; some industrial-style lenses are coated with anti-fog coating (such as hydrophilic nano-coating), which is not easy to fog in high-temperature and high-humidity environments (such as chemical workshops, food processing); the frame adopts a sealed design with anti-side leakage wings, which can block dust, droplets, and chemical liquids from invading the eyes from the side, adapting to laboratories, medical and other scenarios.

3. Lightweight and Ergonomic Design, Comfortable to Wear

The injection molding process can realize the lightweight and fit design of safety glasses: the overall weight is controlled between 20-50g (only 1/3-1/2 of traditional glass safety glasses), and there is no obvious sense of pressure when worn for a long time (such as 8-hour industrial work); the frame adopts an arc-fitting design, the temple arc adapts to the head contour, and the nose pads are made of soft silicone or TPR materials (Shore hardness 30-40 degrees), which have a large contact area with the bridge of the nose and uniform pressure distribution (pressure per unit area ≤1kPa), avoiding pain caused by local pressure; some styles of temples can adjust the length or angle to adapt to different head circumference sizes (people with head circumference 520-580mm), improving wearing adaptability.

4. Environmental Corrosion Resistance, Long Service Life

Safety glasses need to adapt to a variety of harsh environments, and their materials and processes have excellent weather resistance and corrosion resistance: the frame uses materials such as TR90 and PA66, which can withstand temperature changes from -30℃ to 120℃ (no embrittlement at low temperatures, no softening and deformation at high temperatures), adapting to high and low temperature work scenarios (such as cold storage, metallurgical workshops); strong chemical corrosion resistance, no discoloration or cracking after contact with common industrial chemicals (such as alcohol, acetone, dilute sulfuric acid), suitable for chemical and laboratory scenarios; the lens coating is firmly combined with the substrate, and after 500 friction tests (friction with a suede cloth applying 5N force), the retention rate of scratch resistance and UV protection performance is ≥90%, and the normal service life can reach 2-3 years, much longer than ordinary protective glasses.

B、Production Process of Safety Glasses Injection Moulding

1. Product Design and Mold Development

First, determine the core parameters according to the protection scenario: industrial glasses need to focus on strengthening impact resistance and chemical resistance (lens thickness 3-5mm, frame wall thickness 2-3mm), outdoor glasses focus on UV protection and lightweight (lens thickness 2-3mm, frame weight ≤30g), and laboratory glasses emphasize sealing and anti-fog properties (frame with wing sealing structure). Draw a 3D model through CAD/CAE software (such as UG, Moldflow), focusing on designing: the optical surface of the lens (ensuring light transmittance ≥90%, no optical distortion), the ergonomic arc of the frame nose pads and temples, and the assembly gap between the frame and the lens (≤0.1mm, avoiding lens loosening). In the mold design stage, the lens mold uses high-precision optical grade mold steel (such as S136), and the cavity surface is polished to Ra≤0.012μm (to ensure lens light transmittance); the frame mold uses P20 or H13 steel, and multiple sets of cooling water channels are set (arranged evenly according to the frame wall thickness, cooling time 15-25s) to avoid deformation after molding. The mold needs to be verified through trial molding: the lens needs to test optical performance (such as light transmittance, diopter error), and the frame needs to test dimensional accuracy (such as temple spacing error ≤0.5mm).

2. Raw Material Preparation and Injection Molding

(1) Lens production

The main raw material for lenses is PC, with the addition of functional additives such as anti UV agents (0.5% -1%, such as UV-531), antioxidants (0.2% -0.3%, to prevent high-temperature degradation), and transparency agents (to improve light transmittance). The raw materials need to be dried (temperature 120-140 ℃, time 4-6 hours, moisture content ≤ 0.02%) to avoid bubbles after injection molding. Adopting a precision horizontal injection molding machine (locking force 100-200 tons, injection accuracy ± 0.1g), process parameters: barrel temperature 260-300 ℃ (front section 260-280 ℃, rear section 280-300 ℃), injection pressure 80-100MPa, holding pressure 60-70MPa, cooling time 20-30s. After injection molding, the lens needs to be annealed (temperature 120 ℃, insulation for 2 hours) to eliminate internal stress and avoid cracking in the later stage.

(2) Mirror frame production

The raw materials for the mirror frame are selected according to the scene: for industrial use, glass fiber reinforced PA66 (with 20% glass fiber added to improve strength) is selected, and for outdoor use, TR90 (lightweight, good toughness) is selected. The raw materials are mixed with color masterbatch (such as prominent yellow and orange for industrial use to improve recognition) and dried (TR90 drying temperature 80-100 ℃, time 2-3 hours). Adopting a medium-sized injection molding machine (locking force of 200-300 tons), process parameters: TR90 material temperature of 230-260 ℃, injection pressure of 70-90MPa; PA66+glass fiber material temperature is 250-280 ℃, injection pressure is 90-110MPa, cooling time is 15-25s. After demolding the mirror frame, the gate residue needs to be removed (using laser cutting, accuracy ± 0.05mm) to avoid scratching the skin.

P&M Safety Glasses Injection Moulding(Specification)

P&M Safety Glasses Injection Moulding Feature And Application

1. Industrial Production Scenario

Core Requirements: High impact resistance, chemical corrosion resistance, dust prevention, adapting to high-frequency risk scenarios such as mechanical processing and assembly.

Product Features: Lenses are made of 3-5mm thick PC or PA materials, coated with scratch-resistant + chemical-resistant coatings (can withstand dilute acids and alkalis); frames are made of glass fiber reinforced PA66 (wall thickness 2-3mm), with anti-side leakage wings (blocking dust and debris intrusion); colors are mainly eye-catching yellow and orange (improving workshop recognition), some styles have headbands (replacing temples, adapting to hard hat wearing); meet ANSI Z87.1 and GB 14866 industrial protection standards, and can withstand the impact of 16mm steel balls falling from 1.3m.

2. Outdoor Work Scenario

Core Requirements: UV protection, lightweight, anti-fog, adapting to environments with strong ultraviolet rays or large temperature differences such as construction, welding, and plateaus.

Product Features: Lenses are made of 2-3mm thin PC materials, coated with UV400 anti-UV coating (UV blocking rate ≥99%) + anti-fog coating (adapting to outdoor temperature differences); frames are made of TR90 (weight ≤30g), temples can adjust length (adapting to 520-580mm head circumference), nose pads are antibacterial silicone (avoiding discomfort caused by sweating); some welding-specific lenses are dark (light shielding rate ≥95%) to block welding arc light; the overall design fits the face, reducing wind resistance, suitable for outdoor mobile work.

3. Laboratory and Medical Scenario

Core Requirements: Strong sealing, chemical splash prevention, antibacterial, adapting to scenarios such as laboratory reagent operations and medical protection.

Product Features: Lenses are made of PC materials, coated with chemical-resistant coatings (can contact alcohol, acetone and other reagents); frames are of sealed design (fitting gap between frame and face ≤0.5mm), with soft silicone sealing rings (blocking droplets and chemical liquid intrusion); the contact parts of nose pads and temples are medical-grade silicone (antibacterial rate ≥99%), which can be disinfected at high temperature (boiled at 121℃ for 30 minutes); some styles of lenses can be replaced (such as replacing anti-fog or anti-chemical lenses according to experimental needs), meeting the hygiene standards of the medical industry.

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.