Optical Lens PMMA Injection Molding Parts

Optical plastics include polymethyl methacrylate (PMMA), polystyrene (PS), polycarbonate (PC) propyl diethylene glycol carbonate (CR39) styrene propylene copolymer (SAN) styrene acrylate copolymer In addition, some commercial products such as Optorez 1330, Zeonex E48R, etc. are also included.

The main products of Zhongwei Precision Machinery Co., Ltd. are nylon products, plastic products, ABS series, rubber products, etc. Types of injection molding materials that can be processed: polyethylene (PE), polypropylene (PP), nylon (PA, PA6, PA66), polyoxymethylene (POM), ABS, polyurethane (TPU), polyphenylene sulfide (PPS), polystyrene Carbonate (PC), Polyetheretherketone (PEEK), etc.

Product Description

1.Optical lens PMMA injection molding parts implementation standard: the company strictly implements ISO9001, ISO14001, IATF16949, VDA6.3 certification, and the product has passed ROHS, FDA EU certification, etc.

2. Product material standards: ISO, GB, ASTM, SAE, EN, DIN, BS, AMS, JIS, ASME, DMS, TOCT, GB

3. Main processes: plastic injection molding, metal insert injection molding, investment casting, die-casting aluminum,

4. Available materials for injection molding:

Processable nylon products, plastic products, ABS series; injection molding material types: polyethylene (PE), polypropylene (PP), nylon (PA, PA6, PA66), polyoxymethylene (POM), ABS, polyurethane (TPU), poly Phenyl sulfide (PPS), polycarbonate (PC), polyether ether ketone (PEEK) and 3D printing can be customized according to customer requirements.

Applications in optics

One of the most common is PMMA, also called acrylic material, which is widely used in optical lens sets. PMMA, namely polymethyl methacrylate Poly (methyl methacrylate), has excellent optical properties, comparable to optical glass. Because the refractive index and Abbe number are similar to crown glass, it is also called crown optical plastic.

Compared with optical glass, Optical lens PMMA injection molding parts have the advantages of simple manufacture, low cost, light weight, good impact-resistance, and good weathering and ultraviolet radiation resistance. Although unmodified pure PMMA is fragile and easy to scratch, these shortcomings can be completely solved by the modification of ingredients.

The optical lens made of PMMA has excellent optical performance. A sample with a thickness of 3mm can transmit more than 92% of visible light. The loss mainly comes from the reflection of about 4% on each side caused by the refractive index difference between the PMMA surface and the air interface. PMMA can cut off external light below 300nm, and can transmit infrared light below 2.8gm, completely cut off infrared light above 25pm, these characteristics are comparable to ordinary optical glass.

The mechanical and electrical properties of PMMA are general, and the optical lenses made are easily affected by temperature. Its thermal expansion coefficient is 8~10 times that of inorganic glass, the long-term use temperature is only 80 °C, and the material has high hygroscopicity. After soaking in water for 24 hours, the water absorption rate reaches 0.1%~0.4%. Due to the presence of easily hydrolyzed ester groups in the molecular structure, PMMA can swell and dissolve in organic solvents, while its ability to resist chemical attack is poor. However, the environmental stability of PMMA is better than that of most other organic polymer materials, such as polystyrene and polyethylene, so PMMA is often used in outdoor devices, and its excellent weather resistance determines that it can be exposed to sunlight even in tropical climates Over the years, the transparency and color changes remain very small.

The optical properties of PMMA and the manufacturing technology of plastic components make PMMA capable of more than 80% of the optical applications of lenses. Of course, PMMA lenses are not suitable for working in environments such as high temperature and solvent contact, nor can large refractive index lenses be prepared. At present, various optical lens sets, plastic optical fibers, medical contact glasses, automobile headlights, aircraft windows, optical disc substrate materials and other fields have been widely used PMMA materials.

Post Injection Molding Process

1. Processing equipment: CNC, WEDM, lathe, milling machine, drilling machine, grinder, etc.;

2. Surface treatment: For some products that require subsequent processing, we can provide surface treatment services to achieve the special purpose of customers. At present, we can provide degreasing, polishing, electroplating (gold, silver, nickel, tin, galvanized, etc.), anodizing, electrophoresis and other surface treatment services for precision parts.

Moulds and Inspection Fixtures

1. Mold service life: usually semi-permanent. (except for lost foam)

2. Mold delivery time: 10-25 days, (according to product structure and product size).

3. Tooling and mold maintenance: Zhongwei is responsible for precision parts.

Quality Control

1. Quality control: the defective rate is less than 0.1%.

2. Samples and trial run will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements

3. Testing equipment: automated visual inspection equipment can carry out 100% inspection of products, spectrum analyzer, golden elephant analyzer, three-coordinate measuring machine, hardness testing equipment, tensile testing machine.

Application

It is widely used, not only in business, light industry, construction, chemical industry and so on. Moreover, plexiglass production is widely used in advertising decoration and sand table models, such as: signs, billboards, light box panels and Chinese and English alphabet panels.

The selection of plexiglass materials depends on the shape design, what kind of shape, what kind of plexiglass, color and variety should be tested repeatedly to achieve the best effect. With a good shape design, it is necessary to rely on careful processing to become a beautiful handicraft.

1. Architectural applications: shop windows, soundproof doors and windows, lighting covers, telephone booths, etc.

2. Advertising applications: light boxes, signs, signs, display stands, etc.

3. Transportation applications: doors and windows of trains, cars and other vehicles, etc.

4. Medical applications: baby incubators, various surgical medical instruments, civilian products: sanitary facilities, handicrafts, cosmetics, brackets, aquariums, etc.

5. Industrial application: instrument panel and cover, etc.

6. Lighting applications: fluorescent lamps, chandeliers, street lampshades, etc.

7. Household application: fruit plate, tissue box, acrylic art painting and other household daily necessities.