US 6,206,683 B1 · Molding device

Abstract

Two sets of linear motors are fixed on opposed sides of a molding head driving device. Each linear motor includes a movable slider facing a casing. The linear motor contains a molding head and a magnetic plate facing a molding head. The use of two linear motors cancels out the magnetic attraction between the facing linear motors. A linear roller guide is disposed vertically in a direction perpendicular to the magnetic attraction between the linear motors so that the magnetic attraction from the linear motors does not act on the linear roller guide. In another embodiment, three sets of molding head driving devices are disposed between left and right frames integrally formed projecting from a base to form a molding device. In a further embodiment a pair of double linear motors drives four molding head driving devices. The double linear motors are affixed together by, for example, bolts.

Claims18

Dependent claims

A molding device comprising:

at least two linear motors mounted on a frame;
said at least two linear motors facing each other separated by a molding head;
a magnetic attraction between said facing linear motors is canceled out by their facing each other;
said linear motors including a magnetic plate disposed toward one of said molding head and said frame, and a movable slide disposed toward the other of said molding head and said frame;
said linear motors permitting vertical movement of said molding head;
a guiding device for guiding a raising and a lowering of said molding head along a vertical direction perpendicular to a direction of magnetic attraction between said linear motors;
and
said magnetic attraction from said linear motors is prevented from acting upon said guiding device.

5 more elements

A molding device comprising:

a molding head;
a guiding device for guiding said molding head in a linear direction;
a molding head driving device;
said molding head driving device including at least first and second linear motors, with one of said first and second linear motors fixed on each side of said molding head;
each of said first and second linear motors including a movable slider and a magnetic plate;
one of said movable slider and said magnetic plate of said first linear motor being affixed to said molding head, and one of said movable slider and magnetic plate of said second linear motor being affixed to said molding head;
a magnetic field of said magnetic plates in said first and second linear motors being oriented so that magnetic fields therefrom cancel at said guiding device;
said guiding device being disposed vertically in a direction perpendicular to said magnetic attraction between said linear motors;
said molding head driving device is formed in a modular structure so that said guiding device is not affected by said magnetic attraction between said linear motors;
and
at least one of said molding head driving devices is disposed between a left frame, a center frame, and a right frame projecting from a common base.

8 more elements

Dependencies are inferred from the claim text.

Molding device

Life of this patent

Molding device

Life of this patent

Abstract

Claims18