Mold and method for molding a reinforced preform

Patent metadata

Field	Value
Publication number	US-11511501-B2
Application number	US-201916594292-A
Country	US
Kind code	B2
Filing date	Oct 7, 2019
Priority date	Oct 7, 2019
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A mold for molding a reinforced preform having at least two apertures therein includes first and second mold halves, first and second emitters disposed in the mold halves and configured to emit light therefrom, first and second receivers disposed in the mold halves and configured to receive light from the respective first and second emitters, and first and second moving members having couplings for connection with side portions of the reinforced preform and actuators for moving the couplings between respective first and second positions. A controller determines an alignment condition based on signals received from the receivers. If the alignment condition fails to meet predetermined criteria, then at least one of the actuators is caused to move its coupling from its respective first position to a respective adjusted position that is different from the respective second position.

First claim

What is claimed is:

1. A mold for molding a reinforced preform having at least two apertures therein, comprising:
a first mold half having a first molding surface;
a second mold half having a second molding surface;
the first and second mold halves being disposed with the first and second molding surfaces facing each other, the mold halves defining a mold body and being configured to transition between an open position in which the mold halves are spaced apart from each other and a generally closed position in which the mold halves are proximate each other and define a cavity between the first and second molding surfaces;
first and second moving members, each having a respective coupling configured for connection with a respective side portion of the reinforced preform and a respective actuator configured for moving the respective coupling between a respective first position in which the respective coupling is disposed at a respective first distance from a center of the mold body and a respective second position in which the respective coupling is disposed at a respective second distance from the center of the mold body that is greater than the first distance, wherein the first position of each respective coupling is located in the first mold half, in the second mold half or outside the mold body;
a first emitter disposed in the first mold half and configured to emit light therefrom into the cavity;
a first receiver disposed in the second mold half and configured to receive light from the first emitter and produce a first signal indicative of the light received from the first emitter;
a second emitter disposed in one of the first and second mold halves and configured to emit light therefrom into the cavity;
a second receiver disposed in the other of the first and second mold halves and configured to receive light from the second emitter and produce a second signal indicative of the light received from the second emitter; and
a controller operatively connected to the first and second emitters, the first and second receivers, and the first and second moving members, the controller being configured for:
causing each respective actuator to move its respective coupling from its respective first position to its respective second position,
causing the first and second emitters to emit light,
receiving the first and second signals from the first and second receivers,
determining an alignment condition based on the first and second signals,
determining if the alignment condition meets predetermined criteria,

if the alignment condition meets the predetermined criteria, then transitioning the mold halves from the open position to the generally closed position, and
if the alignment condition fails to meet the predetermined criteria, then causing at least one of the actuators to move its respective coupling from its respective first position to a respective adjusted position based on the alignment condition, wherein the respective adjusted position is different from the respective second position.

2. A mold according to claim 1 , wherein the first and second moving members are configured such that when the reinforced preform is placed between the first and second mold halves and each coupling is connected with its respective side portion of the reinforced preform and the actuators move their respective couplings from their respective first positions to their respective second positions, the first and second moving members are configured to stretch the reinforced preform.

3. A mold according to claim 1 , wherein one of the first and second molding surfaces protrudes outward from its respective mold half, and the other of the first and second molding surfaces recedes into its respective mold half.

4. A mold according to claim 1 , wherein, when the reinforced preform is placed between the first and second mold halves, the first signal is indicative of a first alignment among the first emitter, the first receiver and a first of the two apertures, and the second signal is indicative of a second alignment among the second emitter, the second receiver and a second of the two apertures.

5. A mold according to claim 4 , wherein the first and second alignments are linear alignments.

6. A mold for molding a reinforced preform having at least two apertures therein, comprising:
a first mold half having a first molding surface;
a second mold half having a second molding surface;
the first and second mold halves defining a mold body and being disposed with the first and second molding surfaces facing each other, the mold halves being configured to transition between an open position in which the mold halves are spaced apart from each other and a generally closed position in which the mold halves are proximate each other and define a cavity between the first and second molding surfaces;
a first emitter disposed in the first mold half and configured to emit light therefrom into the cavity;
a first receiver disposed in the second mold half and configured to receive light from the first emitter and produce a first signal indicative of the light received from the first emitter;
a second emitter disposed in one of the first and second mold halves and configured to emit light therefrom into the cavity;
a second receiver disposed in the other of the first and second mold halves and configured to receive light from the second emitter and produce a second signal indicative of the light received from the second emitter;
first and second moving members, each having a respective coupling configured for connection with a respective side portion of the reinforced preform and a respective actuator configured for moving the respective coupling between a respective first position in which the respective coupling is disposed at a respective first distance from a center of the mold body and a respective second position in which the respective coupling is disposed at a respective second distance from the center of the mold body that is greater than the first distance, wherein the first position of each respective coupling is located in the first mold half, in the second mold half or outside the mold body; and
a controller operatively connected to the first and second emitters, the first and second receivers, and the first and second moving members, the controller being configured for:
causing the first and second emitters to emit light,
receiving the first and second signals from the first and second receivers,
determining an alignment condition based on the first and second signals,
determining if the alignment condition meets predetermined criteria,
if the alignment condition meets the predetermined criteria, then transitioning the mold halves from the open position to the generally closed position, and
if the alignment condition fails to meet the predetermined criteria, then causing at least one of the actuators to move its respective coupling from its respective first position to a respective adjusted position based on the alignment condition, wherein the respective adjusted position is different from the respective second position.

7. A mold according to claim 6 , wherein one of the first and second molding surfaces protrudes outward from its respective mold half, and the other of the first and second molding surfaces recedes into its respective mold half.

8. A mold according to claim 6 , wherein, when the reinforced preform is placed between the first and second mold halves, the first signal is indicative of a first linear alignment among the first emitter, the first receiver and a first of the two apertures, and the second signal is indicative of a second linear alignment among the second emitter, the second receiver and a second of the two apertures.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Rodgers William R
• Aitharaju Venkateshwar R
• Zhao Selina X

Classifications

• B29C2043/3602

  with means for positioning, fastening or clamping the material to be formed or preforms inside the mould · CPC title

• B29C70/46 Primary

  using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs · CPC title

• B29C43/58

  Measuring, controlling or regulating {(for bank adjustment in calendering B29C43/245)} · CPC title

• B29C70/56

  Tensioning reinforcements before or during shaping · CPC title

• B29K2105/089

  fabric · CPC title