WO2003028991A1 - Machine for converting synthetic or natural resins or rubbers - Google Patents

Machine for converting synthetic or natural resins or rubbers Download PDF

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Publication number
WO2003028991A1
WO2003028991A1 PCT/EP2002/010506 EP0210506W WO03028991A1 WO 2003028991 A1 WO2003028991 A1 WO 2003028991A1 EP 0210506 W EP0210506 W EP 0210506W WO 03028991 A1 WO03028991 A1 WO 03028991A1
Authority
WO
WIPO (PCT)
Prior art keywords
platens
machine according
flanges
machine
uprights
Prior art date
Application number
PCT/EP2002/010506
Other languages
French (fr)
Inventor
Albino Rossi
Original Assignee
Ferioli Filippo S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferioli Filippo S.P.A. filed Critical Ferioli Filippo S.P.A.
Priority to EP02800096A priority Critical patent/EP1432567A1/en
Publication of WO2003028991A1 publication Critical patent/WO2003028991A1/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/46—Manufacturing multilayer circuits
    • H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/041—Guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/062—Press plates
    • B30B15/064—Press plates with heating or cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B7/00—Presses characterised by a particular arrangement of the pressing members
    • B30B7/02—Presses characterised by a particular arrangement of the pressing members having several platens arranged one above the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B7/00—Presses characterised by a particular arrangement of the pressing members
    • B30B7/02—Presses characterised by a particular arrangement of the pressing members having several platens arranged one above the other
    • B30B7/026—Spacer elements; Changing means therefor

Definitions

  • the present invention relates to a machine for converting synthetic or natural thermosetting resins or rubbers.
  • the invention relates to the presses used in the field of the manufacturing of multilayer circuit boards.
  • thermosetting resins such as for example bases for printed circuits, flexible flat electric resistors, et cetera
  • the forming process moreover, requires cooling for fixing and size calibration.
  • presses used and produced so far comply with three of the four functions required by the production cycle: heating with diathermic oil up to a maximum of 250 °C, pressure, and vacuum, but in these presses cooling is impossible because in the same press the platens containing oil and the external control unit to be cooled would require very long times. Accordingly, in presses of this kind the process is ended by removing vacuum and pressure and by transferring the manufactured articles to another press with cooled platens.
  • a severe drawback of conventional presses is the difficulty of keeping the various layers of the circuit board centered during molding procedures.
  • This difficulty is due mainly to the thermal expansion to which the platens of the press are subjected, due to the considerable temperature variations.
  • the operating temperatures of the platens of the presses can in fact be between approximately 80 °C and 420 °C.
  • the aim of the present invention is to provide a machine for converting synthetic or natural thermosetting resins or rubbers that overcomes the drawbacks of the cited prior art.
  • FIG. 1 is a plan view of a platen of a machine for converting natural or synthetic resins or rubbers, particularly of a press for producing multilayer circuit boards;
  • FIG. 2 is a plan view, rotated through 90° with respect to the preceding view, of the heated platen of the machine according to the invention
  • FIG. 3 is a schematic lateral elevation view of a platen supporting device
  • FIG. 4 is a schematic plan view of a platen supporting device
  • FIG. 5 is a perspective view of a flanged member of the supporting device
  • FIG. 6 is a plan view of the flanged member of Figure 5;
  • FIG. 7 is a sectional elevation view of the flanged member;
  • FIG. 8 is a partial perspective view of a heated platen of the machine according to the invention.
  • the machine according to the invention is particularly useful for manufacturing multilayer circuit boards and comprises multiple platens 2, which are superimposed so as to form, between them, multiple interspaces that will form the various layers of the circuit board, in a per se known manner.
  • Each platen 2 is heated, in the specific case, by means of heating devices 1 which are alternated with tubes 33 and holes embedded in the platen for the passage of cooling fluid.
  • the heating device 1 comprises a heating member, in the specific case an elongated electric resistor that is embedded in the body of the platen 2.
  • the platens 2 are supported by four cylindrical vertical uprights 3 by respective supporting devices so that the platens 2 can define at least one open position, shown in FIG. 3, in which the platens are spaced and it is possible to insert the parts to be processed, and at least one closed position, not shown in the figures, in which the platens 2 are mutually in contact.
  • Each platen 2 has four supporting devices, and each supporting device has a wing 4 that is formed monolithically with the platen 2, which is provided with four wings, one for each supporting device.
  • Each wing 4 can be accommodated between two flanges, designated by the reference numerals 5 and 6 respectively, of a flanged body 7 constituted by a circular tube 8 in which the upright 3 is inserted.
  • Each wing 4 has a recess 44 on both upper and lower faces.
  • the recess 44 is shaped so as to match the shape of the flanges 5 and 6, i.e., is substantially curved.
  • the recess 44 forms a curved surface 45, which makes contact with the outer surface of the respective flange 5 and 6 in a tangential point of contact 19.
  • the wing 4 is in tangential contact with the outer vertical wall of the tube 8 and, for this purpose, has a curved contact surface 9.
  • Each platen supporting device has helical springs 10, adapted to contrast the action of the press on the platens.
  • Each spring 10 acts between a flanged body 7 and the directly adjacent bodies above and below, and for this purpose each spring 10 is inserted in a spring hole 11 formed in a flange, 5 or 6, and rests on the other one of the flanges in a region that does not have a hole and is provided with a circular seat 12 for the end of the spring.
  • the platens 2 can be mutually spaced by a maximum height that is determined by the presence of spacers 13 whose ends are fixed to one of the flanges of the two adjacent bodies and can slide in holes 14 formed in the other one of the two flanges.
  • the springs 10 are set differently, depending on the level of application, in the specific case so that their modulus increases from the upper platens toward the lower ones.
  • the supporting device according to the invention allows the wings 4 of each platen 2 to slide with respect to the upright 3 with a constant tolerance regardless of the operating temperature of the system.
  • FIG. 2 is a schematic view of the geometry of the system according to the invention.
  • the letter ⁇ designates the angle formed between the central straight line 15, which connects the center 16 of the upright 3 to the center 17 of the platen 2, and the tangent straight line 18, which passes through the center of the platen 17 and is tangent to the flanges 5 and 6 of the flanged body 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Graft Or Block Polymers (AREA)

Abstract

A machine for converting synthetic or natural thermosetting resins or rubbers, comprises a plurality of heated platens (2) supported by a plurality of uprights (3) by means of supporting devices. The platens (2) are heated and vertically movable with respect to the uprights (3). The supporting devices allow the platens (2) to slide with respect to the uprights (3) in a substantially horizontal direction and the substantially horizontal sliding for compensating the thermal expansion has a constant tolerance at any operating temperature of the machine.

Description

MACHINE FOR CONVERTING SYNTHETIC OR NATURAL RESINS OR RUBBERS
The present invention relates to a machine for converting synthetic or natural thermosetting resins or rubbers.
More particularly, the invention relates to the presses used in the field of the manufacturing of multilayer circuit boards.
In the forming of composite manufactured articles that include metals, reinforcement fibers, thermosetting resins, such as for example bases for printed circuits, flexible flat electric resistors, et cetera, in addition to the temperature for the reaction of the resins it is necessary to provide a certain pressure and vacuum in order to evacuate the air and reaction gases. The forming process, moreover, requires cooling for fixing and size calibration.
The machines (presses) used and produced so far comply with three of the four functions required by the production cycle: heating with diathermic oil up to a maximum of 250 °C, pressure, and vacuum, but in these presses cooling is impossible because in the same press the platens containing oil and the external control unit to be cooled would require very long times. Accordingly, in presses of this kind the process is ended by removing vacuum and pressure and by transferring the manufactured articles to another press with cooled platens.
A severe drawback of conventional presses is the difficulty of keeping the various layers of the circuit board centered during molding procedures.
This difficulty is due mainly to the thermal expansion to which the platens of the press are subjected, due to the considerable temperature variations.
The operating temperatures of the platens of the presses can in fact be between approximately 80 °C and 420 °C. The aim of the present invention is to provide a machine for converting synthetic or natural thermosetting resins or rubbers that overcomes the drawbacks of the cited prior art.
A particular object of the present invention is to provide a press for manufacturing multilayer circuit boards and/or flexible resistors with a significant increase in the centering precision of one layer with respect to the others. Another object of the invention is to provide a machine that is economically advantageous.
This aim, these objects and others that will become apparent hereinafter are achieved, by a machine for converting synthetic or natural resins or rubbers, as claimed in the appended claims.
Further characteristics and advantages will become apparent from the description of preferred but not exclusive embodiments of the invention, illustrated only by way of non- limitative example in the accompanying drawings, wherein:
FIG. 1 is a plan view of a platen of a machine for converting natural or synthetic resins or rubbers, particularly of a press for producing multilayer circuit boards;
FIG. 2 is a plan view, rotated through 90° with respect to the preceding view, of the heated platen of the machine according to the invention;
FIG. 3 is a schematic lateral elevation view of a platen supporting device; FIG. 4 is a schematic plan view of a platen supporting device; FIG. 5 is a perspective view of a flanged member of the supporting device;
FIG. 6 is a plan view of the flanged member of Figure 5; FIG. 7 is a sectional elevation view of the flanged member;
FIG. 8 is a partial perspective view of a heated platen of the machine according to the invention. With reference to the cited figures, the machine according to the invention is particularly useful for manufacturing multilayer circuit boards and comprises multiple platens 2, which are superimposed so as to form, between them, multiple interspaces that will form the various layers of the circuit board, in a per se known manner.
Each platen 2 is heated, in the specific case, by means of heating devices 1 which are alternated with tubes 33 and holes embedded in the platen for the passage of cooling fluid.
The heating device 1 comprises a heating member, in the specific case an elongated electric resistor that is embedded in the body of the platen 2.
The platens 2 are supported by four cylindrical vertical uprights 3 by respective supporting devices so that the platens 2 can define at least one open position, shown in FIG. 3, in which the platens are spaced and it is possible to insert the parts to be processed, and at least one closed position, not shown in the figures, in which the platens 2 are mutually in contact.
Each platen 2 has four supporting devices, and each supporting device has a wing 4 that is formed monolithically with the platen 2, which is provided with four wings, one for each supporting device.
Each wing 4 can be accommodated between two flanges, designated by the reference numerals 5 and 6 respectively, of a flanged body 7 constituted by a circular tube 8 in which the upright 3 is inserted. Each wing 4 has a recess 44 on both upper and lower faces. The recess 44 is shaped so as to match the shape of the flanges 5 and 6, i.e., is substantially curved.
The recess 44 forms a curved surface 45, which makes contact with the outer surface of the respective flange 5 and 6 in a tangential point of contact 19.
The wing 4 is in tangential contact with the outer vertical wall of the tube 8 and, for this purpose, has a curved contact surface 9.
Each platen supporting device has helical springs 10, adapted to contrast the action of the press on the platens.
Each spring 10 acts between a flanged body 7 and the directly adjacent bodies above and below, and for this purpose each spring 10 is inserted in a spring hole 11 formed in a flange, 5 or 6, and rests on the other one of the flanges in a region that does not have a hole and is provided with a circular seat 12 for the end of the spring.
The platens 2 can be mutually spaced by a maximum height that is determined by the presence of spacers 13 whose ends are fixed to one of the flanges of the two adjacent bodies and can slide in holes 14 formed in the other one of the two flanges. In order to allow uniform packing of the platens 2, i.e., in order that the pressure between one platen and the other, when the press is actuated, is substantially equal between the upper platens and the lower platens, the springs 10 are set differently, depending on the level of application, in the specific case so that their modulus increases from the upper platens toward the lower ones. The supporting device according to the invention allows the wings 4 of each platen 2 to slide with respect to the upright 3 with a constant tolerance regardless of the operating temperature of the system.
FIG. 2 is a schematic view of the geometry of the system according to the invention. The letter α designates the angle formed between the central straight line 15, which connects the center 16 of the upright 3 to the center 17 of the platen 2, and the tangent straight line 18, which passes through the center of the platen 17 and is tangent to the flanges 5 and 6 of the flanged body 7.
By constructing a plane that is parallel to the tangent line 18 in the point of tangency 19, one obtains a constant-tolerance sliding at any operating temperature. In practice, it has been found that the invention achieves the intended aim and objects.
The machine according to the invention is susceptible of numerous modifications and variations, within the scope of the appended claims. All the details may be replaced with technically equivalent elements. The materials used, as well as the dimensions, may of course be any according to the requirements and the state of the art.

Claims

1. A machine for converting synthetic or natural resins or rubbers, comprising heated platens supported by uprights by means of supporting devices, said platens being heated and vertically movable with respect to said uprights, characterized in that said supporting devices allow said platens to slide with respect to said uprights in a substantially horizontal direction and in that the resulting substantially horizontal sliding, for compensating the thermal expansion, has a substantially constant tolerance at any operating temperature of the machine.
2. The machine according to claim 1 , characterized in that each supporting device comprises a wing that is formed monolithically with said platen and can be accommodated between two flanges of a flanged body constituted by a circular tube in which said upright is inserted.
3. The machine according to claim 2, characterized in that said wing comprises a recess, on both upper and lower faces, said recess being shaped like said flanges, i.e., substantially curved, said recess forming a curved surface that makes contact with the outer surface of the respective flange in a tangential point of contact.
4. The machine according to claim 3 characterized in that said wing is in tangential contact with the outer vertical wall of said tube and has a curved contact surface.
5. The machine according to claim 1 characterized in that said platen supporting device comprises helical springs adapted to contrast the action of the press on the platens.
6. The machine according to claim 1 characterized in that said platen supporting device comprises helical springs adapted to contrast the action of the press on the platens each spring acting between a flanged body and the directly adjacent ones above and below, and for this purpose each spring is inserted in a spring hole formed in a flange and rests on the other of the flanges in a region that is not provided with a hole and has a seat for the end of said spring.
7. The machine according to claim 1 characterized in that said platens can be mutually spaced by a maximum height determined by the presence of spacers whose ends are fixed to one of the flanges of the two adjacent bodies and can slide in spacer holes formed in the other one of the two flanges.
PCT/EP2002/010506 2001-09-25 2002-09-19 Machine for converting synthetic or natural resins or rubbers WO2003028991A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02800096A EP1432567A1 (en) 2001-09-25 2002-09-19 Machine for converting synthetic or natural resins or rubbers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2001A001985 2001-09-25
IT2001MI001985A ITMI20011985A1 (en) 2001-09-25 2001-09-25 MACHINE FOR THE TRANSFORMATION OF RESINS OR SYNTHETIC OR NATURAL RUBBER

Publications (1)

Publication Number Publication Date
WO2003028991A1 true WO2003028991A1 (en) 2003-04-10

Family

ID=11448419

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/010506 WO2003028991A1 (en) 2001-09-25 2002-09-19 Machine for converting synthetic or natural resins or rubbers

Country Status (4)

Country Link
EP (1) EP1432567A1 (en)
IT (1) ITMI20011985A1 (en)
TW (1) TW548177B (en)
WO (1) WO2003028991A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020161417A3 (en) * 2019-02-05 2020-10-01 Novares France Method for laminating a protective screen onto a flexible display support and die intended for implementing said lamination method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE654890A (en) *
DE1052670B (en) * 1957-12-23 1959-03-12 Eugen Siempelkamp Stack presses for the production of chipboard or the like with press plates guided according to the cross thread principle, in particular heating plates
JPS60259402A (en) * 1984-06-06 1985-12-21 株式会社　太平製作所 Method and device for opening and closing horizontal type multistage press
JPS62227599A (en) * 1986-03-29 1987-10-06 Meiki Co Ltd Multi-stage hot press device
JP2000343288A (en) * 1999-06-07 2000-12-12 Meiki Co Ltd Specific pressure control device of press

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE654890A (en) *
DE1052670B (en) * 1957-12-23 1959-03-12 Eugen Siempelkamp Stack presses for the production of chipboard or the like with press plates guided according to the cross thread principle, in particular heating plates
JPS60259402A (en) * 1984-06-06 1985-12-21 株式会社　太平製作所 Method and device for opening and closing horizontal type multistage press
JPS62227599A (en) * 1986-03-29 1987-10-06 Meiki Co Ltd Multi-stage hot press device
JP2000343288A (en) * 1999-06-07 2000-12-12 Meiki Co Ltd Specific pressure control device of press

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 087 (M - 678) 19 March 1988 (1988-03-19) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 15 6 April 2001 (2001-04-06) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020161417A3 (en) * 2019-02-05 2020-10-01 Novares France Method for laminating a protective screen onto a flexible display support and die intended for implementing said lamination method

Also Published As

Publication number Publication date
ITMI20011985A1 (en) 2003-03-25
EP1432567A1 (en) 2004-06-30
TW548177B (en) 2003-08-21
ITMI20011985A0 (en) 2001-09-25

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