GB2039824A - Shaping Thermoplastic Double Plate Having Stays - Google Patents
Shaping Thermoplastic Double Plate Having Stays Download PDFInfo
- Publication number
- GB2039824A GB2039824A GB8001022A GB8001022A GB2039824A GB 2039824 A GB2039824 A GB 2039824A GB 8001022 A GB8001022 A GB 8001022A GB 8001022 A GB8001022 A GB 8001022A GB 2039824 A GB2039824 A GB 2039824A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stays
- channels
- double
- plates
- shaped
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 13
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 13
- 238000007493 shaping process Methods 0.000 title claims description 17
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 238000007666 vacuum forming Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000012815 thermoplastic material Substances 0.000 claims description 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/0044—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping edges or extremities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/006—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor for making articles having hollow walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/02—Bending or folding
- B29C53/04—Bending or folding of plates or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2024/00—Articles with hollow walls
- B29L2024/006—Articles with hollow walls multi-channelled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2025/00—Frameless domes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/778—Windows
- B29L2031/7782—Glazing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
Abstract
A thermoplastic double plate with stays and channels inbetween is shaped by deep drawing, for example by vacuum forming, compressed air forming or forming in a moulding tool with a counter punch. To prevent the channels being compressed and the surface of the plate collapsing between the individual stays, the individual channels are sealed off before the double plates are shaped, the sealing off being achieved by squeezing, welding, or by means of sealing elements.
Description
SPECIFICATION
Method of Shaping Thermoplastic Double
Plates with Stays
This invention relates to a method of shaping thermoplastic double plates with stays which have channels between the stays by a deep drawing process, i.e. by vacuum forming, compressed air forming or forming by means of a moulding tool with a counter punch.
Double plates with stays are normally produced from various thermoplastic materials in thicknesses in the range of from 3 to 15 mm with a weight per unit area in the range of from 400 to 3000 g/m2. Because of the channels between the stays double plates are distinguished by their high rigidity for a given weight per unit area.
For many proposed applications it is desirable to shape these plates by known deep drawing methods. But until now it has not been possible to shape such double plates with stays by deep drawing processes without distorting the supporting stays to at least a certain extent, thereby impairing the strength properties such as the rigidity. This is mainly due to the fact that
shaping of the double plates compresses the
channels between the stays and the surface of the
plate collapses between the individual stays.
It is therefore an object of the present invention to provide a process for shaping thermoplastic double plates with stays which have channels between the stays, by a deep drawing process, in such a manner that the mechanical strength of the double plates is not reduced and in particular the channels between the stays are not compressed and the surface of the plate does not
collapse between the individual stays.
According to the present invention this
problem is reduced or substantially obviated by
sealing off the individual channels between the
stays before the plates are shaped.
It has been found that the above described
damage caused to the double plates during the
shaping process can be prevented by the
inclusion of air in the individual channels between
the stays of the double plates. It is surprisingly found that the air enclosed in the channels of the
double plates serves as a sufficiently strong
supporting cushion to prevent collapse of the
double plate during shaping.
The present invention therefore relates to a
process for shaping thermoplastic double plates
with stays and channels between the stays by
means of a deep drawing process wherein the
channels between the stays of the double plate
are sealed off before the double plate is shaped.
According to a preferred embodiment of the
inventive process the channels are sealed off by
squeezing or by welding, which provides a
particularly complete method of sealing off the
channels.
It is also possible to seal off the channels by
means of sealing elements. This is also a very
complete method of sealing which can moreover be carried out without distorting the ends of the channels.
The invention is described below with reference to the accompanying drawings comprising seven figures in which
Fig. 1 is a cross-section through a double plate with stays shaped in known manner,
Fig. 1 A is an enlarged portion of the double plate with stays of Fig. 1,
Fig. 2 is a cross-section through a second double plate with stays shaped in known manner,
Fig. 3A is a longitudinal section through a double plate with stays which has not been shaped,
Fig. 3B shows the double plate of Fig. 3A after the ends of the channels between the stays have been closed,
Figure 3C shows the double plate of Fig. 3B but after it has been shaped by deep drawing, and
Fig. 3D is a top plan view of the double plate of
Fig. 3C.
Fig. 1 viewed in conjunction with Fig. 1 A illustrates how the stays of channels in double plates with stays are compressed when the plates are shaped by the usual deep drawing process with the ends of the channels open.
Fig. 2 shows the typical collapse of the surface of the plate between the individual stays of a double plate with stays which has been shaped in the known manner.
Fig. 3A is a cross-section through a double plate with stays before it has been shaped by the process according to the invention.
Fig. 3D shows the same double plate after the edges of the plate have been sealed transverse to the direction of the channels between the stays.
This may be done by squeezing or welding or by sealing off with sealing elements.
Fig. 30 is a cross-section of double plates of
Fig. 3A treated by the process according to the invention after the plates have been shaped by deep drawing, and shows how both the structure and the surface of the channels are left intact. Fig.
3D is a top plan view of the shaped double plates with stays, showing the direction of the stays indicated in broken lines, and the sealed ends of both sides of the channels in between.
The double plates shaped by the process according to the invention may be used in for various applications, e.g. in the construction of motor vehicles, for the formation of the car roof, door filling and the tops of luggage boots.
Compared with conventional materials such as compressed board, polymer foams or resin impregnated fibres, parts made of double plates manufactured by the process according to the invention have the advantage of high rigidity combined with elasticity, good thermal insulation, low weight and insensitivity to moisture. When such shaped double plates are used, it is not necessary to provide reinforcements since the material is self-supporting.
Claims
1. A process for shaping thermoplastic double
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (10)
1. A process for shaping thermoplastic double plates with stays and channels inbetween by means of deep drawing wherein the individual channels of the double plates are sealed off before the double plate is shaped.
2. A process as claimed in Claim 1, wherein the channels are sealed off by squeezing.
3. A process as claimed in Claim 1, wherein the channels are sealed off by welding.
4. A process as claimed in Claim 1, wherein the channels are sealed off by means of sealing elements.
5. A process as claimed in Claim 1, wherein deep drawing is carried out by vacuum forming.
6. A process as claimed in Claim 1, wherein deep drawing is carried out by compressed air forming.
7. A process as claimed in Claim 1, wherein deep drawing is carried out by forming in a moulding tool with a counter punch.
8. A process as claimed in Claim 1 substantially as herein described.
9. A process as claimed in Claim 1 substantially as herein described with reference to the accompanying drawings.
10. A thermoplastic double plate which has been shaped by a process as claimed in any of claims 1 to 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT7919299A IT7919299A0 (en) | 1979-01-15 | 1979-01-15 | PROCEDURE FOR FORMING HOLLOW SHEETS OF THERMOPLASTIC RESINS. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2039824A true GB2039824A (en) | 1980-08-20 |
| GB2039824B GB2039824B (en) | 1982-12-22 |
Family
ID=11156533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8001022A Expired GB2039824B (en) | 1979-01-15 | 1980-01-11 | Shaping thermoplastic double plates having stays |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS55113522A (en) |
| AT (1) | AT369692B (en) |
| BE (1) | BE881114A (en) |
| DE (1) | DE2912772A1 (en) |
| ES (1) | ES8100147A1 (en) |
| FR (1) | FR2446162A1 (en) |
| GB (1) | GB2039824B (en) |
| IT (1) | IT7919299A0 (en) |
| NL (1) | NL7902647A (en) |
| SE (1) | SE7902362L (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2607434A1 (en) * | 1986-11-28 | 1988-06-03 | Beghin Say Sa | Method for thermoforming an internally braced dual-wall panel |
| FR2698901A3 (en) * | 1992-12-07 | 1994-06-10 | Ecodis Sa | Domed transparent panel manufacturing procedure - made from twin-wall polycarbonate which is subjected to cold air blowing after heating. |
| WO1996016791A1 (en) * | 1994-12-02 | 1996-06-06 | Shannon B.V. | Method for introducing sealing edges into panels of thermoplastic material, and an assembly therefor |
| EP1419915A1 (en) * | 2002-11-13 | 2004-05-19 | HAPPICH Fahrzeug- und Industrieteile GmbH | Method for manufacturing an outside door element |
| US7347910B2 (en) | 2001-10-03 | 2008-03-25 | Oy Kwh Pipe Ab | Method for manufacturing a container end wall of lightweight construction and a container provided with such an end wall |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0345221Y2 (en) * | 1985-10-03 | 1991-09-25 | ||
| DE19918784C1 (en) | 1999-04-26 | 2001-01-18 | Kr Porsiplast Verpackungssys | Process for deforming hollow body panels made of thermoplastic material |
| DE19918783A1 (en) | 1999-04-26 | 2000-11-02 | Kr Porsiplast Verpackungssys | Method and device for deforming hollow bodies made of thermoplastic material |
-
1979
- 1979-01-15 IT IT7919299A patent/IT7919299A0/en unknown
- 1979-03-16 SE SE7902362A patent/SE7902362L/en not_active Application Discontinuation
- 1979-03-27 AT AT0225779A patent/AT369692B/en not_active IP Right Cessation
- 1979-03-30 DE DE19792912772 patent/DE2912772A1/en not_active Withdrawn
- 1979-04-04 NL NL7902647A patent/NL7902647A/en not_active Application Discontinuation
-
1980
- 1980-01-11 GB GB8001022A patent/GB2039824B/en not_active Expired
- 1980-01-11 BE BE0/198936A patent/BE881114A/en not_active IP Right Cessation
- 1980-01-14 JP JP220080A patent/JPS55113522A/en active Pending
- 1980-01-15 ES ES487696A patent/ES8100147A1/en not_active Expired
- 1980-01-15 FR FR8000815A patent/FR2446162A1/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2607434A1 (en) * | 1986-11-28 | 1988-06-03 | Beghin Say Sa | Method for thermoforming an internally braced dual-wall panel |
| FR2698901A3 (en) * | 1992-12-07 | 1994-06-10 | Ecodis Sa | Domed transparent panel manufacturing procedure - made from twin-wall polycarbonate which is subjected to cold air blowing after heating. |
| WO1996016791A1 (en) * | 1994-12-02 | 1996-06-06 | Shannon B.V. | Method for introducing sealing edges into panels of thermoplastic material, and an assembly therefor |
| NL9402035A (en) * | 1994-12-02 | 1996-07-01 | Shannon Bv | Method for applying sealing edges in panels of thermoplastic material and an assembly therefor. |
| US7347910B2 (en) | 2001-10-03 | 2008-03-25 | Oy Kwh Pipe Ab | Method for manufacturing a container end wall of lightweight construction and a container provided with such an end wall |
| EP1419915A1 (en) * | 2002-11-13 | 2004-05-19 | HAPPICH Fahrzeug- und Industrieteile GmbH | Method for manufacturing an outside door element |
Also Published As
| Publication number | Publication date |
|---|---|
| ES487696A0 (en) | 1980-11-01 |
| DE2912772A1 (en) | 1980-07-24 |
| SE7902362L (en) | 1980-07-16 |
| ES8100147A1 (en) | 1980-11-01 |
| BE881114A (en) | 1980-07-11 |
| AT369692B (en) | 1983-01-25 |
| JPS55113522A (en) | 1980-09-02 |
| GB2039824B (en) | 1982-12-22 |
| ATA225779A (en) | 1982-06-15 |
| IT7919299A0 (en) | 1979-01-15 |
| NL7902647A (en) | 1980-07-17 |
| FR2446162A1 (en) | 1980-08-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |