With the invention of LIM and LSR silicones in the 1970s, United States molders
began transitioning to injection molding of liquid silicones to reduce their labor cost.
This is because PET blow molders
consume the same amount of energy regardless of output volume.
In the meantime, he reiterated the benefits both automatic molders
and the mold-handling systems have brought to AC Foundry: "We've improved consistency, operational and labor efficiency, we can train a molder
in hours and have dropped our cleaning room costs dramatically.
Al Hunter's first machine, which came off the drawing board in early 1964, was designed to accept existing matchplate patterns of the size being used by hand molders
. It was developed to be a very forgiving machine in that it could produce quality, high-pressure sand molds from less than ideal sand.
By placing the part to be tested between the indicator lenses and looking through to any available light source, the molder
can immediately detect stresses and weld lines, revealed as dark areas.
Many excellent custom rubber molders
endeavor to keep this leakage under control.
are starting to move to the Far East and taking their know-how with them.
Large volume consumers among the largest molders
can receive 5% to 20% discounts from list prices for annual orders of over 10,000 pounds.
To reduce transportation costs, blow molders
are moving closer to these companies--in the range of 200 to 300 miles rather than the 300- to 400mile radius previously prescribed.
The unique processing of TPEs could be exploited to secure existing business and provide an opportunity to expand into markets not now open to thermoset rubber molders
. An investment in blow molding equipment could be an important first step in using TPEs to complement existing thermoset rubber business, enabling the thermoset rubber part fabricator to participate in the growth of TPEs.
* It's easier than ever for injection molders
to get in on the action in direct compounding and molding of long-fiber reinforced thermoplastics (D-LFT).
NPE also saw the emergence of new control technology that increases productivity and reduces energy use for injection-blow molders
. The Smart Control from Plastic World, Inc.
For custom blow molders
, the machine is said to maximize productivity with a maximum cycle time of 2 sec.
of automotive and industrial rubber and plastic products.
Traditional multi-component machines were often rigid in their configuration and programming, not ideal for custom molders
that need the flexibility to manufacture many different types of products.