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 

©2019 by Longzu Plastic Molding CO., LTD

No. 1, Sec. 4, Ziqiang Rd., Sanchong Dist., New Taipei City 241, Taiwan