METHOD OF FORMING A MUFFLER PREFORM
First Claim
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1. A method of forming a preform product, the method comprising:
- filling a mold cavity with glass fibers, the mold cavity defining an inlet end, a second end opposite the inlet end, and a longitudinal axis; and
simultaneously applying suction to the mold cavity axially from the second end and further simultaneously applying suction radially inwardly from a longitudinal passage within the mold cavity, thereby forming a preform product.
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Abstract
A method of forming a preform product includes filling a mold cavity with glass fibers. The mold cavity has an inlet end, a second end opposite the inlet end, and a longitudinal axis. Suction is applied simultaneously to the mold cavity axially from the second end, and suction is further simultaneously applied radially inwardly from a longitudinal passage within the mold cavity, thereby forming a preform product.
55 Citations
23 Claims
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1. A method of forming a preform product, the method comprising:
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filling a mold cavity with glass fibers, the mold cavity defining an inlet end, a second end opposite the inlet end, and a longitudinal axis; and simultaneously applying suction to the mold cavity axially from the second end and further simultaneously applying suction radially inwardly from a longitudinal passage within the mold cavity, thereby forming a preform product. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of forming a preform product within a muffler shell, the method comprising:
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filling a muffler shell cavity with glass fibers, the muffler shell cavity defining an inlet end and a second end opposite the inlet end, and having a perforated tube extending from the first end to the second end of the cavity; and simultaneously applying suction to the muffler shell cavity axially from the second end and further simultaneously applying suction radially inwardly through apertures formed in the perforated tube, thereby forming a preform product. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A mold for forming a preform product, the mold having a first end and a second end, the mold comprising:
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an outer mold portion having a longitudinal axis and a first end and a second end; an inner mold portion disposed longitudinally within the outer mold portion, a substantially annular space between the inner mold portion and the outer mold portion defining a mold cavity, wherein the inner mold portion includes a closed first end, an open second end, and a plurality of apertures formed therethrough; and an end plate disposed at the second end of the mold and having a centrally formed opening and a plurality of vacuum holes, wherein the centrally formed opening defines a passage into a cavity formed in the inner mold portion, and the vacuum holes define passages into the mold cavity; and a vacuum source disposed adjacent the second end of the mold. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method of forming a preform product, the method comprising:
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filling a mold cavity with glass fibers, the mold cavity defining an inlet end, a second end opposite the inlet end, and a longitudinal axis; and simultaneously applying suction to the mold cavity axially from the second end and further simultaneously applying suction radially outwardly through apertures formed in an outer circumferential wall of the mold, thereby forming a preform product. - View Dependent Claims (23)
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Specification