SE516300C2 - Mold part for making single or double curved surface - Google Patents
Mold part for making single or double curved surfaceInfo
- Publication number
- SE516300C2 SE516300C2 SE0000977A SE0000977A SE516300C2 SE 516300 C2 SE516300 C2 SE 516300C2 SE 0000977 A SE0000977 A SE 0000977A SE 0000977 A SE0000977 A SE 0000977A SE 516300 C2 SE516300 C2 SE 516300C2
- Authority
- SE
- Sweden
- Prior art keywords
- source
- negative pressure
- part according
- openings
- curved surface
- Prior art date
Links
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
- 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
- B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
-
- 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
- B29C51/10—Forming by pressure difference, e.g. vacuum
-
- 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
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3807—Resin-bonded materials, e.g. inorganic particles
-
- 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
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3067—Ships
-
- 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
- B29L2031/52—Sports equipment ; Games; Articles for amusement; Toys
- B29L2031/5272—Surf boards
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
20 25 30 516 300 . v u o n n | a a - . ø n | o. 2 Från US 4 123 215 är känd en skalliknande formdel vars för forrnning verksarmna ytor är försedda med ett flertal till undertryck ställda öppningar. I ändamål att avlasta formdelen har den gängse förekommande centrala inneslutningen i formen, alltså det förhållandevis stora centrala inre utrymme med vilket evakueringshålen kommunicerar, ersatts av ett såsom en dubbelvägg utformat skal så att ett antal kanalliknande och volymmässigt förhållandevis små utrymmen avgränsas i väggarna. Det bör inses att de krafter som härvid kommer att verka på forrndelens begränsningsytor blir relativt små tack vare kanalernas förhållandevis små volymer. 20 25 30 516 300. v u o n n | a a -. ø n | o. 2 U.S. Pat. In order to relieve the molded part, the usual central enclosure in the mold, i.e. the relatively large central inner space with which the evacuation holes communicate, has been replaced by a shell designed as a double wall so that a number of channel-like and relatively small spaces are delimited in the walls. It should be understood that the forces which will act on the limiting surfaces of the front part will be relatively small due to the relatively small volumes of the channels.
Nämnda kanalliknande utrymmen är ställda till undertryck på ungefär samma sätt som beskrivits härovan, varvid de på formdelens utsida belägna öppningarna eller de s.k. evakueringshålen står i direkt förbindelse nämnda kanalliknande utrymmen. Även om denna teknik gör det möjligt att tillverka fonndelar med låg vikt, så innebär anordnandet av dubbelväggar att formdelens konstruktion blir förhållandevis komplicerad och därmed också dyrare att tillverka. Vidare begränsas möjligheterna att utnyttja något gasgenomträngligt eller permeabelt material som skal eftersom skalet i sig också skall bilda kanaler för bortledning av mellan forrndelen och plastmaterialet innesluten luft.Said channel-like spaces are subjected to negative pressure in approximately the same manner as described above, the openings located on the outside of the mold part or the so-called the evacuation holes are in direct connection with said channel-like spaces. Although this technology makes it possible to manufacture fund parts with low weight, the arrangement of double walls means that the construction of the mold part becomes relatively complicated and thus also more expensive to manufacture. Furthermore, the possibilities of using any gas-permeable or permeable material as a shell are limited, since the shell itself must also form channels for the discharge of air enclosed between the front part and the plastic material.
Ett syfte med föreliggande uppfinning är därför att åstadkomma en väsentligen förenklad fonndel som är så utformad att den kan tillverkas av mycket lätta och billiga material. Närmare bestämt eftersträvas en fonndel som kan tillverkas av mycket lättviktiga material och därjämte också permeabla material som exempelvis cellplast.An object of the present invention is therefore to provide a substantially simplified fund part which is designed so that it can be made of very light and cheap materials. More specifically, a fund part is sought which can be made of very lightweight materials and also permeable materials such as cellular plastic.
Detta syfte uppnås genom att forrndelen enligt föreliggande uppfinning har erhållit de i patentkraven angivna kännetecknen.This object is achieved in that the front part according to the present invention has obtained the features stated in the claims.
I det följande beskrivs uppfinningen närmare under hänvisning till bifogade ritningar, på vilka fig. 1 och fig. 2 visar en tvärsnittsvy av en fonndel enligt uppfinningen i olika skeenden under varmformning av ett plastmaterial för bildande av ett båtskrov.In the following, the invention is described in more detail with reference to the accompanying drawings, in which Fig. 1 and Fig. 2 show a cross-sectional view of a flag part according to the invention in various events during thermoforming of a plastic material to form a boat hull.
På figurema betecknar siffran 1 allmänt en spännram i vilken en skiva 2 av terrnoplast är upptagen inspänd vid sina perifera kanter. Spännramen l är på ett hissliknande rörlig vertikalt upp och ned så att skivan av tennoplast kan manövreras mellan ett övre läge, i vilket den via ett i figuren ej visat värmeaggregat kan upphettas till formningstemperatur, och ett nedre läge i vilket den upphettade skivan kan draperas eller fritt formas mot utsidan av en allmänt med 3 betecknad kropp utgörande en forrndel 3.On the ur gures, the number 1 generally denotes a clamping frame in which a sheet 2 of thermoplastic is received clamped at its peripheral edges. The clamping frame 1 is on an elevator-like movable vertically up and down so that the sheet of tin plastic can be operated between an upper position, in which it can be heated to a forming temperature via a heating unit not shown in the figure, and a lower position in which the heated sheet can be draped or freely formed towards the outside of a body generally denoted by 3 constituting a front part 3.
Forrndelen 3 är på sin för formning verksamma yta 4 eller på utsidan försedd med ett antal evakueringshål 5 som har till uppgift att åstadkomma en effektiv avluftning S:\LEG\dok\arkiv\l lO032900(0l03l9).doc 10 15 20 25 « Q n q .a 516 300 c u ø n Q ø n a o . o o Q o. 3 mellan fonndelens 3 utsida 4 och plastskivans 2 i samband med att denna draperas över formdelen. Vid sina perifera kanter är forrndelen 3 vidare försedd med en runtomgående tätningslist 6 vars funktion kommer att framgå här nedan. På känt sätt är evakueringshålen 5 är i första hand placerade i området för fonndelens olika höm och skarpa kanter samt i dennas fördjupningar. Antalet evakueringshål 5 och dessas inbördes placering och storlek avgörs på känt sätt också av det valda plastmaterialet och utformning.The front part 3 is provided on its active surface 4 or on the outside with a number of evacuation holes 5 which have the task of achieving an effective venting. nq .a 516 300 cu ø n Q ø nao. o o Q o. 3 between the outside 4 of the mold part 3 and the plastic sheet 2 in connection with this being draped over the mold part. At its peripheral edges, the front part 3 is further provided with a circumferential sealing strip 6, the function of which will be shown below. In a known manner, the evacuation holes 5 are primarily located in the area of the different corners and sharp edges of the fund part and in its depressions. The number of evacuation holes 5 and their mutual location and size are also determined in a known manner by the selected plastic material and design.
Evakueringshålen 5 står via en grenledning 7 och en huvudledning 8 i förbindelse med en i figuren ej visad källa för alstrande av undertryck. Genom anordnandet av en separat ledning 7 till varje evakueringshål 5 erhålls en väsentlig fördel gentemot den typ av kända formdelar som använder en eller flera till undertryck ställda centrala inneslutningar i formdelen, nämligen att fonndelen kan tillverkas av väsentligen tunnare material varvid formarna också blir billigare och väsentligen mer lättviktiga.The evacuation holes 5 are connected via a branch line 7 and a main line 8 to a source not shown in the figure for generating negative pressure. By arranging a separate conduit 7 to each evacuation hole 5, a significant advantage is obtained over the type of known mold parts which use one or more central inclusions in the mold part, namely that the mold part can be made of substantially thinner material, the molds also being cheaper and substantially cheaper. more lightweight.
När det nedhängande plastmaterialet har uppnått den på förhand bestämda temperaturen rör sig spännrarnen 1 nedåt mot formdelen 3 varvid det nedhängande plastmaterialet 2 draperas över densamma. I samband med fonnningen aktiveras källan för bildande av ett undertryck så att den luft som under formningen eventuellt har inneslutits mellan plastskivan 2 och forrndelens 3 utsida 4 leds ut genom evakueringshålen 5.When the hanging plastic material has reached the predetermined temperature, the tensioners 1 move downwards towards the mold part 3, the hanging plastic material 2 being draped over it. In connection with the molding, the source for the formation of a negative pressure is activated so that the air which during the molding may have been trapped between the plastic disc 2 and the outside 4 of the front part 3 is led out through the evacuation holes 5.
Formningssteget avslutas med att eventuell kvarvarande innesluten luft leds ut via evakueringshål belägna på formdelens 3 yttre perifera delar när plastmaterialet kommer i kontakt med fonndelens runtomgående tätningslist 6.The forming step ends with any remaining trapped air being led out via evacuation holes located on the outer peripheral parts of the mold part 3 when the plastic material comes into contact with the circumferential sealing strip 6 of the mold part.
Den föreliggande uppfinningen är inte begränsad till det ovan beskrivna och det på ritningarna visade, utan kan ändras och modifieras på en rad olika sätt inom ramen för den i efterföljande patentkrav angivna uppfinningen.The present invention is not limited to what is described above and what is shown in the drawings, but can be changed and modified in a number of different ways within the scope of the invention stated in the appended claims.
S:\LEG\d0k\arkiv\1 lO032900(0103l9).docS: \ LEG \ d0k \ arkiv \ 1 lO032900 (0103l9) .doc
Claims (5)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0000977A SE516300C2 (en) | 2000-03-22 | 2000-03-22 | Mold part for making single or double curved surface |
PCT/SE2001/000618 WO2001070488A1 (en) | 2000-03-22 | 2001-03-22 | Form part for manufacturing of thermoplastic shell constructions |
AU2001242974A AU2001242974A1 (en) | 2000-03-22 | 2001-03-22 | Form part for manufacturing of thermoplastic shell constructions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0000977A SE516300C2 (en) | 2000-03-22 | 2000-03-22 | Mold part for making single or double curved surface |
Publications (3)
Publication Number | Publication Date |
---|---|
SE0000977D0 SE0000977D0 (en) | 2000-03-22 |
SE0000977L SE0000977L (en) | 2001-09-23 |
SE516300C2 true SE516300C2 (en) | 2001-12-17 |
Family
ID=20278928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE0000977A SE516300C2 (en) | 2000-03-22 | 2000-03-22 | Mold part for making single or double curved surface |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2001242974A1 (en) |
SE (1) | SE516300C2 (en) |
WO (1) | WO2001070488A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10106226B2 (en) | 2015-07-29 | 2018-10-23 | Free Form Factory Inc. | Personal watercraft chassis |
US10391702B2 (en) | 2015-11-24 | 2019-08-27 | Free Form Factory, Inc. | Personal watercraft fabrication using thermoforming |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4123215A (en) * | 1972-11-22 | 1978-10-31 | Kodama Kagaku Kohyo K. K. | Vacuum forming apparatus |
US3988093A (en) * | 1974-11-25 | 1976-10-26 | Birchenough William D | Apparatus for heat forming a continuous web of plastic |
US4692111A (en) * | 1984-03-30 | 1987-09-08 | Wagner Curtis D | Apparatus for forming plastic articles |
DE19827550B4 (en) * | 1998-06-20 | 2005-02-10 | Otto Bock Healthcare Gmbh | Process for producing thermoplastic, partially reinforced plastic components |
-
2000
- 2000-03-22 SE SE0000977A patent/SE516300C2/en not_active IP Right Cessation
-
2001
- 2001-03-22 AU AU2001242974A patent/AU2001242974A1/en not_active Abandoned
- 2001-03-22 WO PCT/SE2001/000618 patent/WO2001070488A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2001070488A1 (en) | 2001-09-27 |
AU2001242974A1 (en) | 2001-10-03 |
SE0000977D0 (en) | 2000-03-22 |
SE0000977L (en) | 2001-09-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |