DK153639B - PROCEDURE FOR MANUFACTURING AN ELASTIC, HEAT-INSULATING SUBSTANCE - Google Patents
PROCEDURE FOR MANUFACTURING AN ELASTIC, HEAT-INSULATING SUBSTANCE Download PDFInfo
- Publication number
- DK153639B DK153639B DK048677AA DK48677A DK153639B DK 153639 B DK153639 B DK 153639B DK 048677A A DK048677A A DK 048677AA DK 48677 A DK48677 A DK 48677A DK 153639 B DK153639 B DK 153639B
- Authority
- DK
- Denmark
- Prior art keywords
- mold
- insulation piece
- rocket
- sheet material
- elastic
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/08—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using solid propellants
- F02K9/32—Constructional parts; Details not otherwise provided for
- F02K9/34—Casings; Combustion chambers; Liners thereof
-
- 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
- B29C67/0029—Cold deforming of thermoplastics material
-
- 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
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
- B29C67/248—Moulding mineral fibres or particles bonded with resin, e.g. for insulating or roofing board
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/02—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising combinations of reinforcements, e.g. non-specified reinforcements, fibrous reinforcing inserts and fillers, e.g. particulate fillers, incorporated in matrix material, forming one or more layers and with or without non-reinforced or non-filled layers
- B29C70/021—Combinations of fibrous reinforcement and non-fibrous material
- B29C70/025—Combinations of fibrous reinforcement and non-fibrous material with particular filler
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2009/00—Use of rubber derived from conjugated dienes, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
- B29K2309/12—Asbestos
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2503/00—Use of resin-bonded materials as filler
- B29K2503/04—Inorganic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
- B29K2709/12—Asbestos
-
- 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
- B29L2031/3097—Cosmonautical vehicles; Rockets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Reinforced Plastic Materials (AREA)
- Laminated Bodies (AREA)
- Moulding By Coating Moulds (AREA)
Description
iin
DK 153639BDK 153639B
Opfindelsen omhandler en fremgangsmåde til fremstilling af formpressede emner, især til anvendelse i omgivelser med høj temperatur såsom raketmotorer.The invention relates to a method for producing molded articles, especially for use in high temperature environments such as rocket motors.
Fra beskrivelsen til U.S.A. patent nr. 3.872.205 kendes 5 et isolationsmateriale for sidevæggen af en raketmotor i form af et lag, der omfatter et elastisk polymer-binde-middel med et deri opløst ildfast kiselholdigt forstærknings-fyldstof samt en fremgangsmåde til formstøbning af et sådant lag. I et specielt eksempel nævnes en poly-10 mer i form af en polybutadien med endestillede carboxyl-grupper, som kan anvendes i forbindelse med de sædvanlige polybutadien-raketdrivstoffer. Imidlertid kræver visse komponenter, såsom hovedendens isolationsmiddel, en støbning i en særskilt form, og det angivne lagformede 15 materiale er klart uegnet til at danne disse komponenter.From the description to U.S.A. U.S. Patent No. 3,872,205 discloses an insulation material for the sidewall of a rocket motor in the form of a layer comprising an elastic polymer binder having a dissolved refractory siliceous reinforcing filler and a method of molding such a layer. In a particular example, there is mentioned a polymer in the form of a polybutadiene having terminated carboxyl groups which can be used in conjunction with the usual polybutadiene rocket propellants. However, certain components, such as the head end insulating agent, require a molding in a separate mold, and the layered material specified is clearly unsuitable for forming these components.
Fra beskrivelsen til U.S.A. patent nr. 3.235.530 kendes en fremgangsmåde til fremstilling af genstande med stor brudstyrke ved varmformstøbning af en sammensætning af asbest og formstofbindemiddel. Bindemidlet er her et 20 varmehærdende formstof i stedet for en elastomer, og der kræves varme til formstøbningen, hvilket uundgåeligt hærder produktet til en meget stiv genstand.From the description to U.S.A. U.S. Patent No. 3,235,530 discloses a process for making articles of high tensile strength by hot molding a composition of asbestos and plastic binder. Here, the binder is a heat-curing resin instead of an elastomer, and heat is required for the molding, which inevitably cures the product to a very rigid object.
Opfindelsen har til formål at tilvejebringe en opbygning af et elastisk bindemiddel og et asbest-fyldstof, hvor 25 der ikke anvendes varme under den aktuelle formpresnings operation, hvorved slutproduktet bliver bøjeligt og foreneligt med de andre elastiske polymer-komponenter og drivstoffer, og hvor der anvendes en koldformpresningsoperation for at undgå hærdning af det formpressede ma-30 teriale.The invention has for its object to provide a structure of an elastic binder and an asbestos filler in which heat is not used during the current molding operation, whereby the final product becomes flexible and compatible with the other elastic polymer components and propellants and where a cold molding operation to avoid curing of the molded material.
Dette opnås ifølge opfindelsen ved en fremgangsmåde af den i krav l's indledning angivne art, der er ejendommelig ved det i kravets kendetegnende del angivne. Fremgangsmåden er en videreudvikling af den fra U.S.A. pa- 2This is achieved according to the invention by a method of the kind set out in the preamble of claim 1, which is characterized by the characterizing part of the claim. The process is a further development of the U.S.A. pa- 2
DK 153639BDK 153639B
tentskrift nr. 3.872.205 kendte proces, idet der er valgt et materiale, som ved den foreslåede særlige behandling giver optimale egenskaber til det omhandlede formål.No. 3,772,205, a material selected which, in the proposed special treatment, provides optimum properties for the purpose in question.
Et således fremstillet emne bevarer den forøgede isola-5 tionsevne af den formpressede sammensætning, er fleksibelt og vil klæbebinde til metaloverflader, med eller uden anvendelse af klæbemiddel, når det anvendes under dets normale opmagasineringstid. Når et sådant emne skal anvendes i en raketmotor, eksempelvis som isolationsmiddel 10 ved hovedenden, kan det udformes til at slutte tæt til profilet af drivstofkammerets skillevæg under tryk, og det kan let føres ind i rakethuset, selv når dette har et let ovalt tværsnitsprofil.An article thus prepared retains the increased insulating ability of the molded composition, is flexible and will adhere to metal surfaces, with or without the use of adhesive, when used during its normal storage time. When such a workpiece is to be used in a rocket motor, for example as an insulating agent 10 at the head end, it can be designed to adhere closely to the profile of the pressurized fuel chamber partition, and it can be easily inserted into the rocket housing, even when it has a slightly oval cross-sectional profile.
Opfindelsen beskrives nærmere nedenfor i forbindelse 15 med tegningen, hvor: \ fig. 1 og la er længdesnit igennem et rakethylster med hovedendeisolationsmidler ifølge to udførelsesformer for opfindelsen, fig. 2 er perspektivisk afbildning af hovedendens isola-20 tionsmiddel på fig. 1, forud for dettes indføring i rakethylsteret, fig. 3a og 3b perspektiviske afbildninger af henholdsvis matricehalvformen og patricehalvformen af en form til formpresning af hovedendens isolationsmiddel på fig.The invention is further described below in connection with the drawing, in which: 1 and 1a are longitudinal sections through a rocket ester with head end insulating means according to two embodiments of the invention; 2 is a perspective view of the head end insulator of FIG. 1, prior to its introduction into the rocket ester; FIG. 3a and 3b are perspective views of the die half mold and the patric half mold respectively of a mold for pressing the main end insulating agent of FIG.
25 2, og fig. 3c en patricehalvform af en form til formpresning af et hovedende-i so lat ionsmiddel som vist på fig. la.25, and FIG. 3c is a patric half-mold of a mold for pressing a head-end sealing agent as shown in FIG. la.
Som vist på fig. 1 og la udformes et metallisk rakethylster 10 med en skillevæg 11 imellem rakettens driv-30 stofkammer 12 og rakettens forreste kammer 13. Et hoved-ende-isolationsstykke 14 er tilvejebragt i hylsteretAs shown in FIG. 1 and 1a, a metallic rocket shell 10 is formed with a partition 11 between the rocket chamber 12 of the rocket and the front chamber of the rocket 13. A head-end insulation piece 14 is provided in the casing
DK 153639BDK 153639B
3' 10 og passer tæt til skillevæggen 11 og de tilstødende områder af hylsterets indervæg. Isolationsstykket 14 kan enten være skålformet i almindelighed med et centralt fremspring 14a ragende ind i drivstofkammeret 12 (se 5 fig. 1) eller være udformet med en central indtrykning 14d (se fig. la). Den ringformede væg 14b af isolationsstykket klæbebinder til indervæggen af hylsteret 10, og bunden 14c af isolationsstykket klæbebinder til skillevæggen 11. Isolationsstykket 14 i den på fig. 1 viste 10 udførelsesform er vist perspektivisk på fig. 2.3 '10 and fits closely to the partition 11 and the adjacent areas of the inner wall of the sheath. The insulating piece 14 may either be cup-shaped in general with a central projection 14a projecting into the fuel chamber 12 (see Fig. 1) or be formed with a central impression 14d (see Fig. 1a). The annular wall 14b of the insulation piece adheres to the inner wall of the casing 10, and the bottom 14c of the insulation piece adheres to the partition 11. The insulation piece 14 in the embodiment of FIG. 1, 10 is shown in perspective in FIG. 2nd
Et sidevægs-isolationsmateriale 15 er tilvejebragt rundt omkring indervæggen af drivstofkammeret 12 og strækker sig over væggen 14b af hovedende-isolationsstykket 14.A sidewall insulation material 15 is provided around the inner wall of the fuel chamber 12 and extends over the wall 14b of the main end insulation piece 14.
Dette materiale omfatter normalt et netværk af asbest-15 fibre og flotteringer i et passende bindemiddel og tilføres i pladeform på de indvendige overflader af hylsteret 10 og isolationsstykket 14 ved hjælp af en udvide-^ lig kautsjukpose. Sluttelig tilvejebringes der et hoved- ende-indsnævringsparti 16 over et parti af materialet 20 15 og den blottede inderflade af isolationsstykket 14 (bortset fra det centrale fremspring 14a eller indtryk-ningen 14d). Indsnævringspartiet 16 virker til at begrænse den blottede drivstofoverflade og udformes normalt af et passende elastomer-materiale, som er foreneligt med 25 det i den pågældende raket anvendte særskilte drivstof.This material usually comprises a network of asbestos fibers and floats in a suitable binder and is applied in plate form to the inner surfaces of the casing 10 and the insulating piece 14 by means of an expandable rubber bag. Finally, a head end constriction portion 16 is provided over a portion of the material 20 15 and the exposed inner surface of the insulating piece 14 (except for the central projection 14a or the impression 14d). The narrowing portion 16 acts to limit the exposed fuel surface and is usually formed of a suitable elastomeric material which is compatible with the separate fuel used in the rocket concerned.
Hensigtsmæssigt lejres et frigørelsesmiddel imellem isolationsstykket 14 og indsnævringspartiet 16 for at nedbringe spændingskoncentrationen ved hovedenden af drivstof pulveret under temperaturkredsløbet.Conveniently, a release agent is stored between the insulation piece 14 and the constriction portion 16 to reduce the stress concentration at the main end of the fuel powder during the temperature circuit.
30 Hovedende-isolationsstykket 14 koldformpresses ud fra strimler, skiver eller trævler stammende fra et præformgivet plademateriale. Dette plademateriale omfatter et elastisk polymer-bindestof i form af en polybutadien med endestillede carboxylgrupper, hvori er dispergeret 35 50-80% (fortrinsvis 65-75%) efter vægt af fyldstof- 4The head-end insulation piece 14 is cold-formed from strips, washers or boards originating from a preformed sheet material. This sheet material comprises a resilient polymeric binder in the form of a polybutadiene having terminated carboxyl groups dispersed in 50-80% (preferably 65-75%) by weight of filler.
DK 153639BDK 153639B
forstærkningsmateriale. Dette omfatter 50-80% efter vægt af asbestfibre og 20-50% efter vægt af asbest-flotteringer.reinforcement material. This includes 50-80% by weight of asbestos fibers and 20-50% by weight of asbestos floats.
En forudgående blanding af bindemidlet, fibrene og flotteringerne tilvejebringes i en blander. Den med binde-5 stoffet mættede masse kalandreres først i et differen- tialhastighedsvalseværk og derefter i et valseværk drevet med konstant hastighed til fremstilling af det uhærdede plademateriale, som nærmere beskrevet i ovennævnte U.S.A. patentskrift nr. 3.872.205.A prior blending of the binder, fibers and flotation rings is provided in a mixer. The binder saturated mass is first calendered in a differential speed rolling mill and then in a constant speed rolling mill to produce the uncured sheet material, as further described in the above U.S.A. U.S. Patent No. 3,872,205.
10 Pladematerialet optrævles og kan anvendes umiddelbart eller oplagres ved lav temperatur (ca. -10°C) til bevarelse af deres presseevne ved at forhindre eller i det mindste modvirke hærdning af polymeren. Naturligvis kan selve pladematerialet oplagres ved lav temperatur 15 og optrævles lige før formpresningen. Den afgørende faktor \ er, at pressematerialet skal være i uhærdet stand.The sheet material is deposited and can be used immediately or stored at low temperature (about -10 ° C) to maintain their pressing ability by preventing or at least counteracting curing of the polymer. Of course, the sheet material itself can be stored at low temperature 15 and rolled up just before molding. The deciding factor \ is that the press material must be in uncured condition.
En typisk opbygning af pressematerialet er følgende: en polybutadien-polymer med endestillede carboxylgrupper ca. 28,2 vægt-% 20 et epoxy-hærdemiddel 1,5 en katalysator, såsom jern-octasol (metalsalt af 2-ethylhexansyre) 0,3 forstærkende asbestfibre 52,5 asbest-fyldstof 17,5 25 Fig. 3a og 3b viser henholdsvis en matricehalvpart og en patricehalvpart af en stålform til formpresning af hovedende-isolationsstykket ifølge den på fig. 1 og 2 viste udførelsesform. Matriceparten 20 har et støbehulrum 5A typical structure of the press material is as follows: a polybutadiene polymer having terminated carboxyl groups approx. 28.2 wt% 20 an epoxy curing agent 1.5 a catalyst such as iron octasol (metal salt of 2-ethylhexanoic acid) 0.3 reinforcing asbestos fibers 52.5 asbestos filler 17.5 FIG. 3a and 3b respectively show a die half and a die half of a steel mold for molding the main end insulation piece according to the one shown in FIG. 1 and 2. The die portion 20 has a mold cavity 5
DK 153639BDK 153639B
21, medens patriceparten 22 har et første cylindrisk parti 23, der passer tæt ind i hulrummet 21, og et andet cylindrisk parti 24 med en lidt mindre diameter. Mellemrummet imellem overfladen af partiet 24 og indervæggen 5 af hulrummet 21 danner således pressekammeret for væggen 14b af hovedendeisolationsstykket 14. Bunden af hulrummet 21 har et ikke vist opragende fremspring, der samvirker med en fordybning 25 i toppen af patriceformparten 22 til dannelse af et pressekammer for bunden af det skål-10 formede isolationsstykke 14 og fremspringet 14a. Alle pressekammerets overflader er belagt med polytetrafluor-ethylen.21, while the patric portion 22 has a first cylindrical portion 23 that fits snugly into the cavity 21, and a second cylindrical portion 24 of a slightly smaller diameter. Thus, the space between the surface of the portion 24 and the inner wall 5 of the cavity 21 forms the pressing chamber for the wall 14b of the main insulation piece 14. The bottom of the cavity 21 has a not shown projecting projection which cooperates with a recess 25 at the top of the molding mold portion 22 to form a press chamber for the bottom of the bowl-shaped insulation piece 14 and the projection 14a. All surfaces of the press chamber are coated with polytetrafluoroethylene.
Profilet af presseformen til formpresning af udførelsesformen på fig. la, hvor der udformes en konisk indtryk-15 ning 14d i stedet for fremspringet 14a, fremgår af fig.The profile of the mold for molding the embodiment of FIG. 1a, where a conical impression 14d is formed instead of the projection 14a, is shown in FIG.
3c, hvor der ikke er noget opragende fremspring ved bunden af hulrummet 21, men hvor fordybningen 25 har et centralt konisk fremspring 26, der udformer indtrykningen 14d i hovedende-isolationsstykket 14. 1 2 3 4 5 6 7 8 9 10 113c, wherein there is no protruding protrusion at the bottom of the cavity 21, but the recess 25 has a central tapered protrusion 26 which forms the indentation 14d in the head end insulation piece 14. 1 2 3 4 5 6 7 8 9 10 11
Pressematerialet vejes og påfyldes i hulrummet 21 af 2 matriceformparten 20. Formen lukkes og materialet sammen 3 presses i formen i 2-4 min. ved et tryk på ca. 15 ton 4 til formgivning af hovedendeisolationsstykket 14, om 5 end pressetidsrummet og pressetrykket i høj grad afhænger 6 af dimensionerne og formen af det emne, der skal presses.The press material is weighed and filled into the cavity 21 by the 2 die mold part 20. The mold is closed and the material together 3 is pressed into the mold for 2-4 minutes. at a pressure of approx. 15 tons 4 for forming the main end insulation piece 14, though 5 than the pressing time and the pressing pressure to a large extent 6 depends on the dimensions and shape of the item to be pressed.
77
Da formoverfladerne er belagt med polytetrafluorethylen, 8 kræves der intet særskilt formsmøremiddel, og det for 9 stås, at presseoperationen simpelt hen består i at sammen 10 trykke materialet til dets ønskede form, og at det pres- 11 sede emne er uhærdet, når det forlader formen. Endvidere er emnet sammenhængende og kan håndteres uden særskilt omsorg uden fare for deformation eller beskadigelse, og emnet kræver ingen efterbehandling forud for dets anvendelse.Since the mold surfaces are coated with polytetrafluoroethylene, 8 no particular mold lubricant is required and it is stated that 9 is simply that the pressing operation is simply to compress the material to its desired shape and that the pressed blank is uncured when leaving. shape. Furthermore, the subject is coherent and can be handled without special care without the risk of deformation or damage, and the subject requires no finishing prior to its use.
6 66 6
DK 153639BDK 153639B
Prøver har vist, at det således fremstillede uhærdede formpressede hovedende-isolationsstykke er bøjeligt og let kan indsættes i et raketmotor-drivstofkammer, selv om dette er let ovalt. Endvidere tætslutter emnet til 5 profilet af skillevæggen under tryk og vil klæbebinde til metaloverflader med eller uden brug af et klæbemiddel, når det anvendes inden for normal opmagasineringstid. Ved hærdning på stedet har hovedende-isolations-stykket høj bestandighed mod afsmeltning, fortrinlige 10 varmeisolationsegenskaber og en god elasticitet ved lav temperatur.Tests have shown that the thus-cured molded head end insulation piece is flexible and can easily be inserted into a rocket engine fuel chamber, although slightly oval. In addition, the workpiece seals to the profile of the partition under pressure and will adhere to metal surfaces with or without the use of an adhesive when used within normal storage time. On site curing, the head end insulation piece has high melt resistance, excellent thermal insulation properties and good low temperature elasticity.
Efter anbringelsen af hovedende-isolationsstykket og tilhørende komponenter i hylsteret 10 til dannelse af opbygningen på fig. 1 eller la kan drivstoffet ifyldes 15 kammeret 12. I den på fig. 1 viste udførelsesform indføres der først en dorn 17 centralt i kammeret. Dornen 17 har en indsænkning 17a, som er komplementær med fremspringet 14a på hovedende-isolationsstykket 14, så at dornen 17 lokaliseres på hovedende-isolationsstykket.Following the insertion of the head end insulation piece and associated components into the casing 10 to form the structure of FIG. 1 or 1a, the fuel can be filled into the chamber 12. In the embodiment shown in FIG. 1, a mandrel 17 is first inserted centrally into the chamber. The mandrel 17 has a recess 17a which is complementary to the projection 14a of the head end insulation piece 14 so that the mandrel 17 is located on the head end insulation piece.
20 Derefter fordeles drivstoffet ved hjælp af tyngdekraften omkring dornen 17. I den på fig. la viste udførelsesform lagres først ladningen i kammeret 12, hvorefter en dorn 18 indføres i kammeret og presses igennem ladningen og ind i indtrykningen 14d. Det ses, at dornen 25 18 har en konisk ende 18a, som er komplementær med ind trykningen 14d, og som derfor passer tæt til indtrykningen til dannelse af en tynd hinde af ladningsmateriale imellem enden og indtrykningens vægge.20 The fuel is then distributed by gravity around the mandrel 17. In the embodiment shown in FIG. 1a, the charge is first stored in the chamber 12, after which a mandrel 18 is inserted into the chamber and pressed through the charge and into the impression 14d. It is seen that the mandrel 25 18 has a tapered end 18a which is complementary to the indentation 14d and which therefore fits closely to the indentation to form a thin web of charge material between the end and the indentation walls.
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA245228 | 1976-02-06 | ||
| CA245,228A CA1057476A (en) | 1976-02-06 | 1976-02-06 | Cold molding material for high temperature applications |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK48677A DK48677A (en) | 1977-08-07 |
| DK153639B true DK153639B (en) | 1988-08-08 |
| DK153639C DK153639C (en) | 1988-12-19 |
Family
ID=4105176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK048677A DK153639C (en) | 1976-02-06 | 1977-02-04 | PROCEDURE FOR MANUFACTURING AN ELASTIC, HEAT-INSULATING SUBSTANCE |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS5946780B2 (en) |
| BE (1) | BE851072A (en) |
| CA (1) | CA1057476A (en) |
| DE (1) | DE2704770A1 (en) |
| DK (1) | DK153639C (en) |
| FR (1) | FR2340194A1 (en) |
| GB (1) | GB1536608A (en) |
| IT (1) | IT1078375B (en) |
| NL (1) | NL172925C (en) |
| NO (1) | NO145750C (en) |
| SE (1) | SE433824B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8696292B2 (en) | 2008-05-30 | 2014-04-15 | Deere & Company | Unloading auger elbow |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3872205A (en) * | 1971-06-02 | 1975-03-18 | United Kingdom Government | Molding process for bonding insula in rachet motor casing |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3655863A (en) * | 1970-01-09 | 1972-04-11 | Monsanto Co | Method of making a contoured composite product |
| US3855176A (en) * | 1970-02-16 | 1974-12-17 | Us Navy | Liner composition for rocket motors comprising crosslinked carboxy terminated polybutadiene with inert filler |
| US3943208A (en) * | 1971-06-02 | 1976-03-09 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defense | Method for binding solid propellant to rocket motor case |
-
1976
- 1976-02-06 CA CA245,228A patent/CA1057476A/en not_active Expired
-
1977
- 1977-01-25 NO NO770241A patent/NO145750C/en unknown
- 1977-02-02 JP JP52010593A patent/JPS5946780B2/en not_active Expired
- 1977-02-03 GB GB4388/77A patent/GB1536608A/en not_active Expired
- 1977-02-03 BE BE174650A patent/BE851072A/en unknown
- 1977-02-04 SE SE7701251A patent/SE433824B/en not_active IP Right Cessation
- 1977-02-04 IT IT19982/77A patent/IT1078375B/en active
- 1977-02-04 DE DE19772704770 patent/DE2704770A1/en not_active Ceased
- 1977-02-04 FR FR7703215A patent/FR2340194A1/en active Granted
- 1977-02-04 DK DK048677A patent/DK153639C/en not_active IP Right Cessation
- 1977-02-07 NL NLAANVRAGE7701274,A patent/NL172925C/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3872205A (en) * | 1971-06-02 | 1975-03-18 | United Kingdom Government | Molding process for bonding insula in rachet motor casing |
Also Published As
| Publication number | Publication date |
|---|---|
| SE433824B (en) | 1984-06-18 |
| NL172925C (en) | 1983-11-16 |
| BE851072A (en) | 1977-05-31 |
| NL7701274A (en) | 1977-08-09 |
| DK48677A (en) | 1977-08-07 |
| JPS5946780B2 (en) | 1984-11-14 |
| NL172925B (en) | 1983-06-16 |
| NO145750B (en) | 1982-02-15 |
| SE7701251L (en) | 1977-08-07 |
| CA1057476A (en) | 1979-07-03 |
| DK153639C (en) | 1988-12-19 |
| FR2340194B1 (en) | 1981-03-27 |
| IT1078375B (en) | 1985-05-08 |
| DE2704770A1 (en) | 1977-08-11 |
| NO145750C (en) | 1982-05-26 |
| JPS52110786A (en) | 1977-09-17 |
| FR2340194A1 (en) | 1977-09-02 |
| NO770241L (en) | 1977-08-09 |
| GB1536608A (en) | 1978-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1504547A (en) | Process of molding hollow articles | |
| US3034791A (en) | Polyurethane golf ball covers | |
| US2717025A (en) | Gasket and method for forming same | |
| US4555373A (en) | Pressing of reinforced thermosetting polymer articles | |
| CA2058882A1 (en) | Formed paperboard containers and method of making same | |
| US3420729A (en) | Molded hollow plastic articles of manufacture rigidified with rigid resinous compositions and process for their manufacture | |
| US2953816A (en) | Shot shell wad molding process | |
| US3100676A (en) | Method for manufacturing a printing roll | |
| DK153639B (en) | PROCEDURE FOR MANUFACTURING AN ELASTIC, HEAT-INSULATING SUBSTANCE | |
| US2977268A (en) | Method of making impregnated glass fiber articles | |
| US1776366A (en) | Method of making hollow objects of synthetic resin materials | |
| US3090999A (en) | Method for making a hand grip | |
| US8574483B2 (en) | Method of deforming a microcellular polyurethane component | |
| US1161756A (en) | Process of manufacturing rollers. | |
| CN108978357B (en) | Paper pulp molding framework for automobile cavity filling material and preparation method thereof | |
| US1764662A (en) | Method of molding articles | |
| US1574658A (en) | Hard-rubber article and method of making same | |
| US2027483A (en) | Method of making composite molded products | |
| US2119278A (en) | Lined or composite battery box and the like | |
| US2284335A (en) | Polystyrene product | |
| US2358535A (en) | Method of making baseballs | |
| US4108940A (en) | Cold molding of flexible articles | |
| US3284556A (en) | Method for injection of transfer molding laminated pressure vessels | |
| US2216785A (en) | Gas expanded latex | |
| SU608654A1 (en) | Method of making the shaping component of a mould |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |