Case study: Interior LED Lamp Processes: Rapid plastic injection molding for volume production Materials: Mold Tool (Reflector Part): 718H / Mold Tool (Lens Part): S136 Reflector Part: -- LG CHEM LUPOY RF3208 solid white (Download the material sheet) Lens part: -- Bayer Makrolon PC2647 clear (Download the material sheet)


Case study: Interior LED Lamp

Processes: Rapid plastic injection molding

for volume production

Materials: Mold Tool (Reflector Part): 718H

       Mold Tool (Lens Part): S136

Reflector Part: -- LG CHEM LUPOY RF3208

solid white (Download the material sheet)

Lens part: -- Bayer Makrolon PC2647 clear  

(Download the material sheet) 

Finish(Reflector Part): High polish

Finish(LensPart):Cavity-Optical polish, core-VDI30

Lead Time:15 working days (10 working days for low volume molding tool)

Mold Life: 100K+Units

Requirement:tooling+molding+ inspection+ assembly+ packing


Step One:

Product Presentation


The interior LED lamp is primarily made of plastic and aluminium. The lamp serves the purpose of illumination in car compartments and is produced by the combination of injection moulding and die casting processes.

For the purpose of this project, we aim to introduce two representative components – The Reflector and the Lens.


After being approached by the client who had inquired about the tooling of his products. The client inquired about the tooling of up to 1000 pieces.

After following standard procedures, our sales team replied the client with a quote within 12 hours. For the rapid tooling process of simple structures, First Part China Limited is able to reduce the time of production from the standard 12 hours to 6 hours. This saves our customers waiting time and allows them to spend more time for accessing and evaluating the produced design.


In the absence of complaints and after reaching a unison conclusion with the clients, we evaluated the options and selected the materials “LG brans solid white PC”, “Bayer Makrolon clear PC” due to their excellent transparency properties which is required by LED lamps. We also picked those materials for their high temperature and wear resistance.

At First Part China Limited, we design for purpose and as such, we selected both materials based on the client’s purpose of design and professional input from First Part’s CAD engineers.

The next step in the process is to engage in DFM communication


Step Two:

DFM Design

The DFM design is developed to show the client a feasible design scheme. In most cases, these DFM designs are available in 1 to 2 days. After a detailed review of the 3D models, we create a DFM design for the client. The Tooling design would also be based on the DFM design. Below are some pictures that illustrate the process:


3D model:

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DFM: (Reflector Part)

20200629101112716.png@!w1200    20200629101112431.png@!w1200


DFM: (Lens)

20200629101112960.png@!w1200    20200629101112912.png@!w1200


Tooling design:


 20200629101112912.png@!w1200



 20200629101112912.png@!w1200


 20200629101112912.png@!w1200



 20200629101112912.png@!w1200



Step Three:

Mold production and Injection testing

Over the next couple of days, the mold production and T1 part injection is done. During the course of these processes, we inject and test some parts while evaluating the results to modify the tooling accordingly. This is important to guarantee that only the highest quality parts are produced.



 

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Step Four:

Assembly

The next step is the assembly. This is done in 7 simple steps. We begin by gathering the accessory parts. The process then continues by installing the “O” ring and then the PCB. After these steps, the light-cup is assembled and installed. The next step in the process is to glue the parts and complete the design with a proper finishing. In simple flow chart, we have

20200629101112912.png@!w1200

1. ACCESSORY PARTS 

20200629101112912.png@!w1200

2.INSTALL THE O RING

20200629101112912.png@!w1200

3. INSTALL THE PCB



20200629101112912.png@!w1200


4. Assemble the light-cup

20200629101112912.png@!w1200


5.Light-cup install

20200629101112912.png@!w1200


6.Gluding

20200629101112912.png@!w1200


7. Finished product


Step Five:

At First Part China Limited, we pride ourselves in making only the best quality products for clients. Our QC department is then saddled with the responsibility of checking for perfection.

All parts are inspected for conformity and quality. The details are accessed from the 3D model to ensure that all the dimensions and sizes meet specifications. We also include a series of lighting, sealing test, dimension checks and so on. 

Sealing test

20200629101115632.png@!w1200    20200629101115552.png@!w1200


Inspect the dimensions


20200629101115193.png@!w1200    20200629101115233.png@!w1200


Lighting test


20200629101116944.png@!w1200    20200629101115710.png@!w1200

INTERIOR LED LAMP
2020-07-20

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