Molding apparatus, molding apparatus unit, and molding method

Patent metadata

Field	Value
Publication number	US-2016297115-A1
Application number	US-201615180648-A
Country	US
Kind code	A1
Filing date	Jun 13, 2016
Priority date	Oct 15, 2012
Publication date	Oct 13, 2016
Grant date	—

Abstract

A molding apparatus ( 1 ) includes: a servomotor ( 11 ) for pressing a resin component (W) by moving an upper mold (MU) in a direction in which the upper mold (MU) is made close to a lower mold (ML); servomotors ( 12 a and 13 a ) each of which retains X-coordinate and Y-coordinate positions of the lower mold (ML); and a position detection section ( 41 ) which determines whether or not the resin component which is sandwiched between the upper mold and the lower mold has been cured, the servomotors each terminating the retention of the lower mold when the resin component has been cured. This makes it possible to obtain a molded product while preventing positional displacement caused by a decrease in volume of a resin which is being cured.

First claim

1 . A molding apparatus for molding a resin, comprising:
an upper mold and a lower mold which comprise paired metal molds and between which the resin is sandwiched while being molded; a first driving section configured to press the resin by moving the upper mold in a first direction in which the upper mold is made close to the lower mold; and a second driving section configured to retain a position of the lower mold that is movable in a second direction which is in a plane perpendicular to the first direction, a controller configured to detect a curing point of the resin and in accordance therewith to terminate the retention of the position of the lower mold with respect to the second direction by the second driving section before the resin which is sandwiched between the upper mold and the lower mold is mold-released.

2 . The molding apparatus as set forth in claim 1 , further comprising:
wherein the controller is configured to determine whether or not the resin which is sandwiched between the upper mold and the lower mold has been cured; a table on which the lower mold is mounted; and a motor configured to move the table in the second direction, the controller being further configured to determine, by detecting a retaining force by which the motor retains the position of the lower mold, and to find that the retaining force has reached a predetermined value after a start of curing of the resin, that the resin which is sandwiched between the upper mold and the lower mold has been cured.

3 . The molding apparatus as set forth in claim 1 , further comprising:
the controller is configured to determine whether or not the resin which is sandwiched between the upper mold and the lower mold has been cured, the controller being further configured to determine, by finding that a predetermined time has elapsed from a start of curing of the resin, that the resin which is sandwiched between the upper mold and the lower mold has been cured.

4 . The molding apparatus of claim 1 ;
wherein the controller is configured to determine whether or not the resin which is sandwiched between the upper mold and the lower mold has been cured, wherein the controller is further configured to determine, by finding that a heating value of the resin which is sandwiched between the upper mold and the lower mold has exceeded a predetermined value, that the resin which is sandwiched between the upper mold and the lower mold has been cured.

5 . A method for molding a resin, the resin being sandwiched between an upper mold and a lower mold which are paired metal molds,
said method comprising: pressing the resin by moving the upper mold in a first direction in which the upper mold is made close to the lower mold; retaining a position of the lower mold that is movable in a second direction which intersects the first direction; and terminating the retention of the position of the lower mold before the resin which is sandwiched between the upper mold and the lower mold is mold-released.

6 . A method of driving a molding apparatus for molding a resin,
the molding apparatus comprising: an upper mold and a lower mold which comprise paired metal molds and between which the resin is sandwiched while being molded; the method comprising: a first driving step of processing the resin by moving the upper mold in a first direction in which the upper mold is made close to the lower mold; and a second driving step of retaining a position of the lower mold that is movable in a second direction which is in a plane perpendicular to the first direction, wherein in the second driving step a curing point of the resin is cured and the retention of the position of the lower mold with respect to the second direction is terminated before the resin which is sandwiched between the upper mold and the lower mold is mold-released.

7 . The method as set forth in claim 6 ,
wherein the molding apparatus further comprises: a table on which the lower mold is mounted; and a motor configured to move the table in the second direction, wherein the method further comprises: a curing determining step of determining whether or not the resin which is sandwiched between the upper mold and the lower mold has been cured, wherein in the second driving step, the retention of the position of the lower mold is terminated in a case where, in the curing determining step, it is determined, by detecting a retaining force by which the motor retains the position of the lower mold, and by finding that the retaining force has reached a predetermined value after a start of curing of the resin, that the resin which is sandwiched between the upper mold and the lower mold has been cured.

8 . The method as set forth in claim 6 , further comprising:
a curing determining step of determining whether or not the resin which is sandwiched between the upper mold and the lower mold has been cured, wherein in the second driving step, the retention of the position of the lower mold is terminated in a case where, in the curing determining step, it is determined, by finding that a predetermined time has elapsed from a start of curing of the resin, that the resin which is sandwiched between the upper mold and the lower mold has been cured.

9 . The method as set forth in claim 6 , further comprising;
a curing determining step of determining whether or not the resin which is sandwiched between the upper mold and the lower mold has been cured, wherein in the second driving step, the retention of the position of the lower mold is terminated in a case where, in the curing determining step, it is determined, by finding that a heating value of the resin which is sandwiched between the upper mold and the lower mold has exceeded a predetermined value, that the resin which is sandwiched between the upper mold and the lower mold has been cured.

Assignees

• Sharp Kk

Inventors

• Nakahashi Takahiro
• Hanato Hiroyuki

Classifications

• B29C2043/025

  forming a microstructure, i.e. fine patterning · CPC title

• B29C35/0805

  using electromagnetic radiation · CPC title

• B29C35/02

  Heating or curing, e.g. crosslinking or vulcanizing {during moulding, e.g. in a mould}(cold vulcanisation B29C35/18 {; vulcanising tyres, presses therefor B29D30/0601}) · CPC title

• B29C43/54 Primary

  Compensating volume change, e.g. retraction · CPC title

• B29C2043/5833

  movement of moulds or mould parts, e.g. opening or closing, actuating · CPC title