CAPABILITIES
Thermosetting and Thermoplastic Injection Molding
Longzu specializes in thermosetting and thermoplastic processes for precision parts.
In addition to the 35- 220 ton machines held at our facility, we also have trusted partnering contractors who can support products that require up to 600 tons of clamping force.
Our factory runs 24 hours a day, 7 days a week giving our customers more control and decision power as well as for those "in-a-bind" moments. Our well-trained operators take pride in the work they produce and see to it that quality is checked throughout the stages of production.
Metals
We've coined the term Molding+ to signify our strength in mold making, which allows us to expand into precision metals.
Longzu and our partnering contractors work cohesively as one and quality control is never compromised.
Portfolio / Experiences
Committed to Excellence
Industry: Aerospace
Product Name : Terminal Block
Mold Method : Thermoplastic injection molding
Material : PPS + SUS 302 metal inserts
Dimension : 8.7" x 2" x 1.33"
Tolerance : 0.015"
While PPS thermoplastic generally produces dimensional stability, the base thickness of this terminal block is nearly 0.5" will typically cause warping. Our experience and expertise in the field allows us to overcome these obstacles.
Industry : Aerospace
Product Name : Shell Plug
Mold Method : CNC
Material : 6061 T6 Aluminum Alloy
Dimension : 1.15" x Φ 0.95
Our 5 axis vertical machine is capable of handling complex geometries with precision tolerances.
Industry: Aerospace
Product Name : Small metal parts
Mold Method : CNC
Material : SUS 303
Dimensions : 0.4" x 0.15" x 0.08"
Our 5 axis vertical machine is capable of handling complex geometries with precision tolerances.
Industry: Mobile and Telecommunication
Product Name : RF Switch
Mold Method : Hoop insert molding
Cavities : 48 (24x2)
Material : LCP + Copper (gold plated)
Volume : 600K / month
Dimension : 3 mm x 3 mm x 1.8 mm
Tolerance : +/- 0.02 mm
This production is fully automated down to the quality control and packaging.
Industry: Automobile
Product Name : X3 Flange
Mold Method : Thermoplastic injection molding + Insert molding
Material : POM
Cavities : 2
Tolerance : + 0.05 mm
The hot runner mold was designed with multiple hydraulic cylinders and automatic sliders including ones to address the undercuts with complex sequence programming.
Industry: Automobile
Product Name : Micro Mini Solder Board Spacer
Mold Method : Insert molding
Material : LCP + C3600 brass
Cavities : 8
Dimension : 1.15 mm x 0.59 mm
Tolerance : +/- 0.05 mm
Industry: Automobile
Product Name : Insulator, Tuning Fork Header
Mold Method : Injection molding + automatic insert pin
Material : PA-6T + 33% GF
Cavities : 8 with 96 pinholes
Tolerance : +/- 0.013 mm (for each pinhole)
Industry: Semiconductor
Product Name : Bridge Diode High Power (15 Amp – 25 Amp)
Mold Method : Thermosetting injection molding + insert molding
Material : Epoxy + 87% silica + heat sink
Cavities : 20
Tolerance : +/- 0.05 mm
The mold was designed with replaceable mold cores to increase the longevity of the mold.
Industry: Pachinko (Pinball game machine)
Product Name : Connector
Mold Method : Insert molding
Material : PA-66 + 25% GF + C2680R-H
Cavities : 24
Volume : 1M / year
Dimension : 5.6 mm x 9.1 mm x 3.75 mm
Tolerance : All dimensions > 3 mm have a tolerance of +/- 0.02 mm
On the back side of each connector is a small protruding key used to interlock with its corresponding housing. In order to remain securely locked, it must hold a 90 degree angle (fillets and chamfers are not allowed).
Industry: Sensor Control
Product Name : Thermostat
Mold Method : Thermosetting + partial assembly
Material : Phenolic
Cavities : 64+
Tolerance : + 0.02mm
Volume : 150M+ pieces per year
We are now able to mass produce parts with precision tolerances using compression molding technique.
Industry: Aerospace
Product Name : KILOVAC connector
Mold Method : Insert molding
Material : PA66 with 25% GF + Brass
Tolerance : +/- 0.05 mm
Mold core is designed for undercut metal terminal.
Industry: Defense
Product Name : MRAC/MNAC Connector
Mold Method : Thermosetting injection molding + Insert pin
Material : DAP
Concentricity tolerance : +/- 0.05 mm within 0.005 mm T.I.R.
Other specifications include:
1) Molding shrinkage must be within 0.001 - 0.004 mm
2) No flash are allowed in holes
3) Each pinhole encompasses 3 separate diameters (entry, middle point, and exit)
Industry: Pneumatics
Product Name : Air Cylinder Valve
Mold Method : Thermoplastic injection molding + Insert molding
Material : PBT + 30% GF + Brass
Cavities : 2
Tolerance : +/- 0.05 mm
To ensure airtight assembly:
1) The concentricity tolerance of all diameters is +/- 0.05 mm
2) No burrs are allowed on contact surface of core pin