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 using Yushin multi-axis servo and Shinwa degating robots. 
From material handling to packaging, processes are automated as much as is practical to control costs and quality of products.


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 using plastic pressure data from the sensors in the tool and various machine inputs. Once the process template is established, it becomes the injection molding process control standard.

what we use

Equipment

· CONAIR material handling system, including (2) 70,000-lb silos, central vacuum, and hopper loaders on all presses
· Yushin Netliner multi -axis servo robots, Yushin HOP III Sprue Pickers,  and Shinwa Aeroboy 4-axis servo degating robots
· Advantage water temperature controllers 
· Una-Dyn dryers
· Rapid and Moditec granulators
· Whaley & Cincinnati Chillers 
· 30 Horsepower LeRoy Dresser screw air compressor with back-up compressor

 

injection molding

Tight Tolerance Molding

Tight visual or dimensional specifications are required for most of WCPI’s 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 gravimetric blenders and automatic or periodic color measurement to ensure color consistency.

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

3

1083.9g

450

1

1400g

650

2

3027.7g

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 Maguire blenders allow us to efficiently handle and blend color concentrates to keep our costs down.