— Professional Technology —

Modular Assembly
Painting Technology
Mold / Injection Technology
Precision Stamping

Modular Assembly
Advantages: with one stop assembling of self-production and self-purchase, we specialize in assembly of the products, such as camera, smart phone, security control, smart home and so on.
Painting Technology
Advantages: meeting special cosmetic process requirements, such as metal/plastic soft touch paint, sprinkling paint, leather paint, glossy design with class 10,000 clean room, painting line(3-painting and 3-baking process), UV line, and 6-axis robotic...
Mold / Injection Technology
Advantages: meeting the requirements of no welding line on surface hole, glossy polish SPI-A1, cosmetic multi–level texture and light product, waterproof function by mold technology of hot runner, gate cut in mold, twisting mold, inner slider mold, etc.
Precision Stamping
Advantages: lower electroplating cost, highly precision bending mold, letters and patterns can be formed by coining technology without additional processing, highly precision hole alignment after bending process.

— Product Introduction —

- About Grandtai -

Grandtai Optical Tech Co., Ltd was founded in 1996. It has modern technology production equipment and technology, and adopts international advanced instruments for quality management. The company covers an area of 18,000 square meters and has ISO9001 quality management system certification, ISO14001 environmental system certification, UL certification and other qualifications.

As a manufacturing enterprise that integrates product appearance ID and mechanism design, development and manufacturing, injection molding, hardware stamping, coating and printing, and finished product assembly, it has many years of experience in the production and manufacturing of high-end cameras, precision optical products, mobile phone 3C electronic products, smart home products and other components, meeting customer requirements for Q (quality), C (cost), D (delivery time), and S (service).

In the face of severe market challenges, the company constantly upholds the corporate culture of "speed, efficiency, and execution", and improves customer service satisfaction and meets customer needs with excellent technical and management capabilities.

1996
Year
Company Establishment
28
+
Technical precipitation
50
+
Technical talents
18000
+
Production Base

- Departments -

Mold
Stamping
Injection
Painting
Assembly
QA

Mold
> Using the programs, such as UG 3D and Moldflow analysis, to predict in advance and ensure the ability of mass production; possessing hi-speed CNC and rapid positioning system with Erowa equipment to make sure the stability of processing; inspecting all mold spare parts with 3D measurement machine to assure the processing can meet the specification of customers at the first time.
> For a wide variety of product features, we possess mold technology as follows: hot runner, gate cut in mold, twisting mold, cylinder drive mold, inner slider mold, etc. Being able to implement auto production without runner in mold.
> Sample build capability：30～50 sets per month.
> Lead time：single injection mold: 21days, double injection mold: 20～28days.

Processing Precision：0.005mm

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Stamping
Precision stamping machine：Precision punch press ranging from 5 tons to 110 tons,13units(35ton～200ton); material thickness of progressive stamping output: 0.07mm～3.0mm; precision: ±0.01mm; bending verticality:+/- 0.03mm; flatness less than 0.05mm after bending; hole precision:H9.
Material：SUS,SPCC,SGCC,SECC,Cooper(Ni/Au),Aluminum,PET.
Machining：HF Hydrocarbon solvent cleaning, tapping(M1.0～M5.0), grinding, polishing, riveting, high temperature painting, electroplating.
Sample build first pass rate is up to 98%.
Mold making lead time: 25days.
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Injection
> Precision injection machines:60 units(50ton～280ton); 15 out of 68 units are double injection machines(160ton～250ton).
> Molding with combining a variety of materials, such as elastomer plastic, hard plastic and metal.
> The yield rate of glossy IR polish by double injection process is up to 95%.
> No welding line on surface hole to meet the requirement of designer and increase the final price of the product.
> Making good use of gate cut in mold to make it to stable quality and less manpower.
> CPK of products is up to 1.67.
> Dimension precision: +/-0.03mm; PL step is below 0.03mm; PL flash is below 0.05mm.
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Painting
> Facilities including class 10,000 clean room, painting line (3-painting and 3-baking process), UV line, and 6-axis robotic arms type coating line.
> Good command of painting technology with glossy PU paint, glossy UV paint, rubber paint, conducting paint, pearl white paint, etc.
> Meeting special cosmetic process requirements, such as metal/plastic soft touch paint, sprinkling paint, leather paint, glossy design.
> The first pass yield of glossy UV/PU paint is up to 90%; FPY of the rest PU paint is up to 97%.
> Surface pattern printing process including simultaneous 6-color auto overprinting, anode printing, and polish printing.
> Warranty of printing location precision (Precision: +/- 0.05mm).
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Assembly
> Cell line production makes the efficiency of PEFF production up to 105%.
> In class 10,000 clean room and ESD management environment, specializing in assembly of the products, such as camera, smart phone, automotive, security control, smart home and so on.
> With the capability of self-purchasing assembling parts including FPC/PCB, battery, fiber optic, wire, conducting material and LCD.
> With the integrated assembly processing including auto welding, ultrasonic welding, auto dispensing machine, punch riveting, CNC, and laser marking.
> Possessing the skills of lens focus inspection, lighting inspection, MIC inspection, CCD inspection, waterproof inspection.

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QA
Certification
> Acquired ISO 9001 certification, and ISO 14001:2015 certification.
> Acquired UL certification (No.:E205242).
> Acquired exhaust gas discharge permit of Guangdong Province, safety production standardization certificate of Guangdong Province.
> Passed Green Access certification of Canon, Ricoh, Nikon.

Examination Equipment
> 2.5D measuring machine, 3D measuring machine, transmittance tester, optical UV film thickness measurement.
> Programmable temperature and humidity test chamber, ironing tester, digital illuminometer.
> X-Ray Fluorescent spectrometer, melt index tester, thermal shock test chamber, hardness measurement device.

Quality Warranty System
Meeting the requirement of less than 50PPM of customers by passing PDCA cycle.

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