Bakelite, also known as bakelite, is a phenolic plastic filled with wood flour. Bakelite has good electrical insulation properties and high temperature resistance, and is especially suitable for the production of electronic appliances, daily-use industries and automotive parts. Bakelite molding process is also relatively wide, and can be used in injection molding, die casting, transfer molding and other processes.
Bakelite injection molding is basically the same as injection molding of other raw materials. The bakelite powder is melt-plasticized by screw to make it into a molten state and has fluidity. Then, the bakelite melt is injected into the mold cavity by the propulsion system, and cooled by cooling. After that, it becomes the final product. The general process points are as follows:
1. The temperature control of the barrel generally adopts multi-stage temperature control mode.
A, two sections of temperature control: the front section 90-95 ° C, the latter section 75-85 ° C;
B, three sections of temperature control: the front section 90-100 ° C, the middle section 80-90 ° C, the latter section 70-80 ° C;
C. If it is injection molding of complex workpieces, adjust the plasticizing temperature according to the specific conditions and injection cycle;
2, back pressure control
The injection pressure of bakelite is generally between 3-5 kb/cm2, and it can be produced according to different products and product structures by selecting appropriate pressure. The bakelite is converted into a fluid state by plasticization, and the fluid is injected into the cavity by using a suitable back pressure. Since the fluidity of the bakelite melt is good, there is no special requirement for the injection back pressure, and a uniform and stable injection is maintained. The pressure is enough.
3, injection speed
The injection speed of bakelite is mainly at medium speed. Due to good fluidity, Bakelite injection does not require a particularly high injection pressure, and can be pressed at a pressure of about 60 kg. Use medium-speed injection, the flow rate of 10-25 grams per second can be, if the injection speed is too fast, it will cause friction and heat generation of the bakelite melt and nozzles, runners, gates, cavities, etc., causing melting If the temperature of the material is too high, decomposition and bubble generation will occur; if the temperature is too slow, the production efficiency will be affected, and the melt will remain in the barrel for too long and cause unnecessary loss.
4, mold temperature control
Bakelite has a faster forming speed. When the mold temperature drops below 70 °C, it begins to form. It is usually molded at a mold temperature of 40 ° C. The period of molding is related to the wall thickness of the product, with a period of 14 seconds per mm thickness. Set up, the general product curing cycle can be between 50-80 seconds.
Bakelite injection has no very special requirements for process requirements, and is also relatively friendly in product design. There is no point that requires special attention. Even so, the pace of improving the efficiency of Bakelite injection is not stopped.
who we are:
Odin Mould Co.,Ltd is a company with several years' experience in the manufacture of plastic custom injection moulds and tool making that offer high quality injection molds, established in 2002, located in Huangyan Taizhou City, known as “Mould Town of China”. Our plastic injection moulds comply with high quality standards, detailed mould specifications and special requirements, enabling us to offer our customers a comprehensive solution to their injection molding needs.
What can we do for you?:
1.Plastic Parts design
3.Mold & Die Manufacturing
4.Plastic injection Molding
How our Mould Quality Control?
1.Mould Material Q/C
- Mould Steel Checking(Hardness, flaw detection)
- Mould Standard Spare Parts Checking(hardness, size, flaw checking)
2. Mould Making Process Q/C
- design checking (part design, mould design, mould engineering drawing)
- Each part of mould’s size checking after machining according to 2D drawing
- mould testing(check mould running condition and first mold testing sample)
3.Make sure that every term is according to customer's requirement.
a) When the mould is vacant, spray anti-rust oil
b) Clean the gate and cooling system regularly
c) Avoid to use recycled material if the mould is suitable for virgin material only
Hot runner system:
The mould steel choice:
ASSAB，Bohler ，Saarstahl，Groditz，Buderus ，Finkl，DAIDO，LKM，Baosteel etc.
1. Cavity & core steel: DIN1.2738 mould steel, with HRC35-38.
2. inserts & slides steel: H13(DIN1.2344), tempered with HRC42-55, Nitrited with HRC60-65
3. Mould spare parts: H13 ( DIN1.2344), tempered with HRC40-45, Nitrited with HRC60-62
4. Mould base: All plate LKM 1050, made in China.
SKD ejector pins, SKD B-ejector pins for a stable movement and longer mould life. Wear plates made by H13 with vacuum quenching heat treatment.
Each mould can be put locking block to make mould be stable,there is no any flash even producing hundreds thousand shots.
Odin Mould Service:
*ODIN company every 10 days, will provide photos for customer show them tooling process
*ODIN company will send samples to the customer to check and amend the requirements.
*ODIN company will send mould test report and video.
Standard mold: JIS, AISI, DIN
Standard for Mold Base:
DME, Hasco, LKM
Standard for Mold Component:
DME, Hasco, Rabourdin, Progressive, Daido
Analysis the CAD from client and give feasible proposal
Modify the CAD after get client confirmation
Start tool design and modify the desgn base on feeback from client
Submit all the 2D/3D drawings to client
Mold Flow 2012
We do the most efficient way and the best machining to be sure the good quality and longer mould life for mould
Involved departments have a meeting to optimize the mold design .
Project Manager is appointed
Mold design in process and approval
Weekly report is submitted with digital pictures.
T-1 samples with FAI is submitted
Final tooling checking after part
About our Mould Packaging and Shipping:
1.Clean all the parts of the moulds.Expecially clean the inner surface of the core and cavity part.
2.Spray the anti-rust oil for the inner surface.
3.Close the moulds.
4.Spray the anti-rust oil for whole outer surface of the mould.
5.Cover the mould with plastic film.
6.Pack wooden case with shiipping marks.
7.Load moulds into the container.
Sent together with the mould:
a) Mould manual instruction
b) engineering drawing in flash disk
c) one more set of mould spare parts: heater, ejector pin, bush, water nozzle, water pipe, hanging ring.
d). Mold P/L strap(s) installed and tightened.
e).Markings for waterline、identification、eyebolt etc. Stamped.