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NO812938L - FORM AND PROCEDURE FOR THE PREPARATION OF A FOAM BODY. - Google Patents

FORM AND PROCEDURE FOR THE PREPARATION OF A FOAM BODY.

Info

Publication number
NO812938L
NO812938L NO812938A NO812938A NO812938L NO 812938 L NO812938 L NO 812938L NO 812938 A NO812938 A NO 812938A NO 812938 A NO812938 A NO 812938A NO 812938 L NO812938 L NO 812938L
Authority
NO
Norway
Prior art keywords
cover
mold
foam
side walls
stated
Prior art date
Application number
NO812938A
Other languages
Norwegian (no)
Inventor
Beat Baumberger
Original Assignee
Mirabed Ag
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 Mirabed Ag filed Critical Mirabed Ag
Publication of NO812938L publication Critical patent/NO812938L/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34Auxiliary operations
    • B29C44/58Moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/30Mounting, exchanging or centering
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/44Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0003Discharging moulded articles from the mould

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Materials For Medical Uses (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

Form og fremgangsmåte til fremstiIling av et skumstofflegerneForm and method for the production of a foam medical device

Den følgende oppfinnelse angår en form til fremstillingThe following invention relates to a mold for production

av et skumstofflegeme;, omfattende nedfellbare eller avtagbare sidevegger og et flytende deksel. of a foam body; comprising collapsible or removable side walls and a floating cover.

For diskontinuerlig fremstilling av skumstofflegemer, for eksempel av polyuretan, anvendes åpne eller lukkede former som den reaksjonsdyktige skumstoffblanding fylles inn i. Etter oppskummingen og herdingen av materialet blir de dannede skumstofflegemer fjernet fra formen. Da disse skumstofflegemer forblir klebrige relativt lenge, må de vanligvis forbli i formen inntil de kan transporteres. Av denne grunn kreves der et stort antall former som det meste av tiden står uproduktivt rundt omkring i produksjonslokalene. Ved større produksjonsytelse utgjør disse i et mellomlager blokkerte former en betydelig kapitalkostnad. For the discontinuous production of foam bodies, for example from polyurethane, open or closed molds are used into which the reactive foam mixture is filled. After the foaming and hardening of the material, the formed foam bodies are removed from the mold. Since these foam bodies remain sticky for a relatively long time, they usually must remain in their form until they can be transported. For this reason, a large number of molds are required, which most of the time stand unproductively around the production premises. In the event of greater production performance, these blocked forms in an intermediate warehouse constitute a significant capital cost.

Også problemet med tilsmussing av formene har man hittil ikke kunnet løse på fullt ut tilfredsstillende måte. Fra AT patentskrift 351.242 er der for eksempel kjent en form hvis deksel har en innsatsdel som er ført av formens sidevegger. Det reaksjonsdyktige materiale kan trenge inn mellom innsatsen og sideveggene og tilsmusse og klebe disse sammen. Enda mere problematisk i denne henseende er formen i hendhold til AT patentskrift 353.473, hvor der foreligger en senkeinnretning for bunnen. Da bunnens sidekanter aldri kan avtettes fullstendig mot formens sidevegger, må man uvegerlig regne med en til-snfussUng og en fastklebing av den indre løf temekanisme. Also, the problem of soiling of the molds has so far not been able to be solved in a fully satisfactory way. From AT patent 351,242, for example, a mold is known whose cover has an insert that is guided by the side walls of the mold. The reactive material can penetrate between the insert and the side walls and contaminate and stick these together. Even more problematic in this respect is the shape in relation to AT patent 353,473, where there is a lowering device for the bottom. As the side edges of the bottom can never be completely sealed against the side walls of the form, one must inevitably count on an additional footing and gluing of the internal lifting mechanism.

Til grunn for oppfinnelsen ligger nå den oppgave å skaffe en form som i minst mulig grad er tilbøyelig til å tilsmusses, og som lett kan rengjøres.. Formen skal dessuten være slik utformet at skumstofflegemet allerede kort tid etter avsluttet oppskummingsreaksjon kan fjernes fra formen for at disse skal kunne anvendes videre i produksjonen istedenfor mellomlagring av klebri<g>e skumstofflegemer og ikke står ubenyttet rundt omkring. The basis of the invention is now the task of obtaining a mold that is least likely to become dirty, and which can be easily cleaned. The mold must also be designed in such a way that the foam material body can be removed from the mold shortly after the foaming reaction has finished so that these must be able to be used further in production instead of temporary storage of sticky foam bodies and not lying around unused.

Disse Qppgaver blir ifølge oppfinnelsen løst ved at bunnen av formen er utformet som vippebunn, og at der over dekselet foreligger organer til føring av dette. According to the invention, these problems are solved by the fact that the bottom of the mold is designed as a tilting base, and that above the cover there are organs for guiding this.

I det etterfølgende vil et utførelseseksempel på opp finnelsen bli nærmere beskrevet under henvisningen til tegninr-gen. Fig. 1 er et perspektivriss av en kjørbar form med deksel. Fig. 2 er et tverrsnitt gjennom formen på fig. 1 som den reaksjonsdyktige, ennå ikke oppskummede skumstoffblanding er fylt inn i. Fig. 3 viser formen på fig. 1 med påsatt deksel og opp-skummet materiale. Fig. 4 viser skjematisk utvippingen av et ennå klebende skumstofflegeme fra formen ved hjelp av vippebunnen. In what follows, an embodiment of the invention will be described in more detail with reference to the drawing number. Fig. 1 is a perspective view of a driveable mold with a cover. Fig. 2 is a cross-section through the shape of fig. 1 into which the reactive, not yet foamed foam mixture is filled. Fig. 3 shows the shape of fig. 1 with attached cover and foamed-up material. Fig. 4 schematically shows the tilting of a still adhesive foam material body from the mold by means of the tilting base.

Den på figurene viste form til fremstilling av skumstofflegemer oppviser en ramme 1 med hjul 2 til bekvem transport. The form shown in the figures for the production of foam bodies has a frame 1 with wheels 2 for convenient transport.

En bunnplate 3 er ved hjelp av et hengsel 4 slik festet på siden av rammen 1 at bunnpla.ten 3 kan svinges oppover. Formen oppviser videre fire sidevegger 5-6, som likeledes er svingbart opplagret på rammen 1 eller er løsbart forbundet med denne for å kunne fj ernes. A bottom plate 3 is attached to the side of the frame 1 by means of a hinge 4 in such a way that the bottom plate 3 can be swung upwards. The mold further exhibits four side walls 5-6, which are likewise pivotably supported on the frame 1 or are releasably connected to this in order to be removed.

Et flytende deksel 7 med avstivninger 8 er forsynt med to oppragende stenger 9. Disse er forskyvbart opplagret i to rør-stykker 10 som på sin side er fast forbundet med en bjelke 11 som er satt ned på formen og overspenner denne. A floating cover 7 with stiffeners 8 is provided with two upstanding rods 9. These are displaceably stored in two pipe pieces 10 which in turn are firmly connected to a beam 11 which is set down on the mold and spans it.

Før innfyllingen av den flytende skumstoffdannende kunst-stoffmasse blir sideveggene 5-6 av formen svingt opp og fast-holdt innbyrdes ved kantene på ikke nærmere vist måte. Nå blir kunststoffmassen fylt inn i formen (fig.2) og dekselet 7 satt på. Under virkningen av det ekspanderende skumstof f blir dek se-' • lét 7, som er sentrert og ført av rørstykkene 20, løftet. Som følge- av dekselets egen vekt utøves der et lett trykk på den masse som skal uppskummes, slik at dennes overflate ikke kan bue seg. Before filling in the liquid foam-forming plastic mass, the side walls 5-6 of the mold are swung up and held together at the edges in a manner not shown. Now the plastic mass is filled into the mold (fig.2) and the cover 7 is put on. Under the action of the expanding foam f, the cover 7, which is centered and guided by the pipe pieces 20, is lifted. As a result of the cover's own weight, a light pressure is exerted on the mass to be foamed, so that its surface cannot bend.

Skumdannelsereaksjonen er avsluttet etter få minutter, og etter et ytterligere kort tidsrom har skumstofflegemet allerede oppnådd en tilstrekkelig høy stabilitet til at det kan tas ut av formen, selv om det i denne tilstand ennå er meget klebrig og ikke kan berøres. Sideveggene 5-6 svinges nå opp eller fjernes, formen kjøres til en lagerplass, og bunnplaten 3 svinges opp for å vippe skumstof f legemet ut (fig. 4).. Formen er nå klar for videre anvendelse i produksjonen. The foaming reaction is finished after a few minutes, and after a further short period of time the foam body has already achieved a sufficiently high stability to be removed from the mold, although in this state it is still very sticky and cannot be touched. The side walls 5-6 are now swung up or removed, the mold is driven to a storage location, and the bottom plate 3 is swung up to tilt the foam body out (fig. 4). The mold is now ready for further use in production.

Claims (5)

1. Form til fremstilling av et skumstofflegeme, omfattende nedfellbare eller avtagbare sidevegger og et flytende deksel, karakterisert ved at bunnen av formen er utformet som vippebunn (3), og at der over dekselet (7) foreligger organer til føring av dette.1. Form for the production of a foam material body, comprising fold-down or removable side walls and a floating cover, characterized in that the bottom of the form is designed as a tilting base (3), and that above the cover (7) there are organs for guiding this. 2. Form som angitt i krav 1, karakterisert ved at vippebunnen består av en bunnplate (3) som ved hjelp av et hengsel (4) er svingbart opplagret på siden av en kjørbar ramme (1) for formen.2. Form as stated in claim 1, characterized in that the tilting base consists of a bottom plate (3) which, by means of a hinge (4), is pivotably stored on the side of a movable frame (1) for the form. 3. Form som angitt i krav 1, karakterisert ved at dekselet (7) har to oppragende stenger (9) som er forskyvbart opplagret i to føringer (10).3. Form as stated in claim 1, characterized in that the cover (7) has two protruding rods (9) which are displaceably stored in two guides (10). 4. Form som angitt i krav 3, karakterisert ved at føringene (10) er festet i en bjelke (11) som er satt ned på formen ovenfra og overspenner denne.4. Form as stated in claim 3, characterized in that the guides (10) are fixed in a beam (11) which is set down on the form from above and spans it. 5. Fremgangsmåte til fremstilling av et skumstofflegeme i en form som angitt i krav 1, " karakterisert ved at en reaksjonsdyktig skumstoffblanding fylles inn i den åpne form, at dekselet deretter settes på, at dekselet etter avsluttet reaksjonsprosess fjernes og sideveggene likeledes felles ned eller fjernes, og at bunnen deretter svinges opp og det ennå klebrige, men formstabile skumstofflegeme vippes ut.5. Method for producing a foam material body in a form as specified in claim 1, "characterized in that a reactive foam material mixture is filled into the open form, that the cover is then put on, that the cover is removed after the reaction process is finished and the side walls are likewise folded down or removed , and that the bottom is then swung up and the still sticky, but shape-stable foam body is tilted out.
NO812938A 1980-09-26 1981-08-28 FORM AND PROCEDURE FOR THE PREPARATION OF A FOAM BODY. NO812938L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH724580 1980-09-26

Publications (1)

Publication Number Publication Date
NO812938L true NO812938L (en) 1982-03-29

Family

ID=4322116

Family Applications (1)

Application Number Title Priority Date Filing Date
NO812938A NO812938L (en) 1980-09-26 1981-08-28 FORM AND PROCEDURE FOR THE PREPARATION OF A FOAM BODY.

Country Status (5)

Country Link
AU (1) AU7446381A (en)
DE (1) DE3128718A1 (en)
ES (1) ES267178Y (en)
GB (1) GB2084069B (en)
NO (1) NO812938L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ225505A (en) * 1987-07-22 1991-11-26 Tonny Ernst Bergqvist Press for manufacture of foamed plastics panels
GB2291002A (en) * 1994-07-08 1996-01-17 Hoover Universal Apparatus and method for producing blocks of foam
ES2124652B1 (en) * 1995-07-05 1999-08-16 Alcala Fibras INSTALLATION OF SYNCHRONIZED INCORPORATION OF SIDE MOLDS IN PLATFORMS OF MANUFACTURE OF POLYURETHANE FOAMS.
CN109049288A (en) * 2018-09-30 2018-12-21 山东省建筑科学研究院 Thermosetting composite polystyrene foam heat-insulating board and preparation process and particular manufacturing craft

Also Published As

Publication number Publication date
ES267178U (en) 1983-08-01
GB2084069A (en) 1982-04-07
AU7446381A (en) 1982-04-01
DE3128718A1 (en) 1982-05-19
GB2084069B (en) 1984-03-14
ES267178Y (en) 1984-02-16

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