Injection Molding at WCPI Offers:
  • Tight Tolerance
  • Color Match
  • Cavity Pressure Control
 
Quality Automation Value Added Services Tool & Mold Building Engineering & Design Injection Molding
 
Capabilities

Injection Molding

World Class Plastics injection molds product in Sumitomo injection molding machines ranging from 50 – 650 metric tons. Most processes are highly automated by using Yushin multi-axis servos and Shinwa Aeroboy degating robots.


From material handling to packaging, processes are automated as much as is practical to control costs and quality of products.

 

Injection Molding Machines

Metric Tons

Qty

Inj. Capacity

50

4

80g

75

1

137g

100

6

139g

130

1

193g

160

2

297.9g

180

2

302g

220

2

675.3g

350

4

1083.9g

450

1

1400g

650

2

3027.7g

what we use

Equipment

 

injection molding

Tight Tolerance Molding

Most of WCPI’s customers require tight visual and/or dimensional tolerances for their products.  Dimensional tolerances on some gears are as tight as 30 microns.  On some threaded valve stems, dimensions are kept to a variance of 0.003”.

Color match is also very critical.  WCPI runs many different custom colors for various customers that are required to meet various L,a,b specifications.

We use 4-component Maguire gravimetric blenders, and automatic or periodic color measurement to ensure color consistency.

injection molding

Cavity Pressure

WCPI utilizes very repeatable and capable Sumitomo injection molding machines; however, injection molding machines can only monitor machine performance. They cannot monitor what is actually occurring in the tool, as the part is formed.


The implementation of a closed-loop feedback cavity pressure system can increase the process control of an injection molding process up to 300% compared to machine controls alone.

A standard process template is created during the mold trial. This is done by using plastic pressure data from the sensors in the tool as well as various machine inputs. Once the process template is established, it becomes the injection molding process control standard.

 
what we can use

Materials

World Class Plastics, Inc injection molds product using various materials. 

Commodity resins include HDPE, Polypropylene, PVC and ABS. 
Engineering resins such as Acetal, Nylon 6, Nylon 6/6, PBT, Polycarbonate. 

We work with multiple material suppliers including companies such as Ferro, Poly One, M. Holland, Asahi and Channel Prime Alliance to meet our customer requirements.

Our Conair material handling system and 4-component Maguire blenders allow us to efficiently handle and blend color concentrates to keep our costs down.