DK152913B - BOTTLES OF ELASTIC MATERIAL FOR A HOLY CYLINDRIC STRESS PRESSURE CONTAINER USING AS EXPRESSION STAMP FOR PLASTIC MASSES - Google Patents
BOTTLES OF ELASTIC MATERIAL FOR A HOLY CYLINDRIC STRESS PRESSURE CONTAINER USING AS EXPRESSION STAMP FOR PLASTIC MASSES Download PDFInfo
- Publication number
- DK152913B DK152913B DK395475A DK395475A DK152913B DK 152913 B DK152913 B DK 152913B DK 395475 A DK395475 A DK 395475A DK 395475 A DK395475 A DK 395475A DK 152913 B DK152913 B DK 152913B
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- DK
- Denmark
- Prior art keywords
- hollow piston
- piston section
- extruder
- container
- wall
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
- B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
- B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container
- B05C17/00579—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container comprising means for allowing entrapped air to escape to the atmosphere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
- B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
- B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Closures For Containers (AREA)
Description
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Opfindelsen angår et bundiukke af elastisk materiale til en hulcylindrisk strengpressebeholder, der tjener som udpresserstempel for plastiske masser, navnlig i en patron, og har en mod strengpres-sebeholderens forrådsrum vendende lukkeskive og et i retningen mod 5 strengpressebeholderens pifyldningsåbning forløbende hulstempelafsnit, der føres mod strengpressebeholderens indervæg, samt med ved den mod lukkeskiven vendende ende af hulstempelafsnittet anbragte og om hulstempelafsnittets omkreds forløbende tætningsorganer for den plastiske masse, hvilke tætningsorganer er udformede som 10 flere set i stemplets længderetning bag hinanden på hulstempelafsnittets yderside forløbende og i dettes materiale formede tætningslæber, hvis kamme lægger sig med friktionsindgreb mod beholderens indervæg.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a bottom closure of resilient material for a hollow cylindrical extruder container serving as an extruder plunger for plastic masses, in particular in a cartridge, and having a closing disc facing the extruder opening of the extruder container in the direction of the extruder compartment. inner wall, and with the end of the hollow piston section disposed at the end of the hollow piston section, and sealing means extending around the perimeter of the hollow piston section, which sealing members are formed as seen several times in the longitudinal direction of the piston on the outer side of the hollow piston section, and in the same shape of the sealing material thereof. settles with frictional engagement against the inner wall of the container.
Ved strengpressebeholdere eller patroner, der indeholder 15 permanent elastiske, permanent plastiske, hærdende og andre lignende pastaagtige masser, navnlig tætningsmasser, kræves sådanne udpresserstempler, som samtidig, indtil den plastiske masse anvendes, tjener som bundlukke for strengpressebeholderen. Ved sådanne som udpresserstempler tjenende bundlukker er det af særlig betydning, at et 20 sådant bundiukke tillader den luft at undvige, som ved indsætningen af udpresserstemplet befinder sig foran iukkeskiven, samt afstryger de rester af den plastiske masse, som ved massens påfyldning hæfter ved strengpressebeholderens indervæg, samt at der under brugen af strengpressebeholderen på anvendelsesstedet er sikret en upåklagelig 25 aftætning af beholderens indre, samtidig med at løsbrydningskræfter-ne skal være så små som muligt.For extruder containers or cartridges containing 15 permanently resilient, permanently plastic, curing and other similar paste-like masses, in particular sealing masses, such extruder pistons are required which simultaneously until the plastic mass is used serve as the bottom closure of the extruder container. In the case of such bottom closures, it is of particular importance that such a bottom closure allows the air to evade the insertion of the extruder piston in front of the sealing disk and to wipe off the residual plastic mass that is adhered to the inner wall of the extruder press during filling. and that during the use of the extrusion container at the site of application, an impeccable seal of the interior of the container is ensured, while at the same time loosening forces must be as small as possible.
Fra beskrivelsen til tysk patent nr. 2.034.047 kendes et bundlukke af den indledningsvis nævnte art, ved hvilket de foran nævnte krav er søgt imødegået i størst mulig udstrækning, og som 30 har en som tætningsorgan tjenende ringlæbe, der ved betjening af udpresserstemplet ved hjælp af en udpresserpistols stødstang lægger sig mod strengpressebeholderens indervæg, men under bundlukkets indsætning dog tillader en udluftning over en ringspalte, og hvor hulstempelafsnittets mod påfyldningsåbningen vendende ende føres og 35 understøttes på strengpressebeholderens indervæg. Denne kendte løsning kræver en særlig udformning i udpresserstemplets indre og en særlig mekanisk betjening over en udpresserpistols stødstang, hvilket, dersom der til fremstillingen anvendes et elastisk formstof, medfører ekstra omkostninger og desuden begrænser anvendelses- 2From the specification of German Patent No. 2,034,047, a bottom closure of the type mentioned above is known, in which the aforementioned claims are sought to be met as far as possible, and which has a ring lip serving as a sealing means which, by operation of the extruder piston, of an extruder gun's bumper attaches to the inner wall of the extruder container, but during insertion of the bottom cap, however, allows venting over a ring slot, and the end of the hollow piston section facing the filling opening is supported and supported on the inner wall of the extruder container. This known solution requires a special design in the inner of the extruder piston and a special mechanical operation over the thrust bar of an extruder gun, which, if used in the manufacture of an elastic resin, incurs additional costs and further limits the use of the extruder.
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mulighederne.opportunities.
Fra tysk brugsmønster nr. 7.400.492 kendes endvidere et bundlukke, der har flere tætningsribber, som forløber rundt om hulstempelafsnittet, og hver især danner en lukket ring, og er an-5 bragte efter hinanden i en i forhold til hulstempelafsnittets længde stor afstand fra hinanden. Disse tætningsribber tjener blot til en bedre aftætning af bundlukket i strengpressebeholderen og kan ved bundlukkets indsætning i denne give en vis afstrygningsvirkning. Imidlertid kan disse tætningsribber, dersom de skal udøve den tilsig-10 tede tætnings-og afstrygningsvirkning, ikke samtidig give mulighed for den foran beskrevne undvigelse af indesluttet luft, når bundlukket indsættes i beholderen. Dette er en alvorlig ulempe, idet der allerede ved en ringe mængde indesluttet luft, indledes en stadigt fremadskridende hærdning henholdsvis vulkanisering af den plastiske 15 masse, saledes at strengpressebeholderens eller patronens indhold allerede efter forholdsvis kort opiagringstid kan blive ubrugeligt. Indesluttede luftlommer på grund af manglende udluftning ved indsætning af bundlukket er imidlertid også en alvorlig ulempe ved ikke-hær-dende masser, idet den ved bundlukkets indsætning indesluttede og 20 komprimerede luft afspændes ved massens udpresning af beholderen, således af afgivelsen af massen fra beholderen er ujævn og afbrydes, og den ønskede ensartede afgivelse af massen, f.eks. ved tætningseller udfugningsarbejder, ikke længere er mulig, hvilket medfører, at arbejdsresultatet er ubrugeligt.Furthermore, from German usage pattern No. 7,400,492, a bottom closure is known which has several sealing ribs extending around the hollow piston section and each forming a closed ring, and are arranged one after another at a long distance from the hollow piston section. each other. These sealing ribs merely serve to better seal the bottom cap of the extruder container and, upon insertion of the bottom cap, may provide some stripping effect. However, if they are intended to exert the intended sealing and wiping action, these sealing ribs may not simultaneously allow for the aforementioned avoidance of entrapped air when the bottom cover is inserted into the container. This is a serious disadvantage, since even with a small amount of trapped air, a progressive cure or vulcanization of the plastic mass is initiated, so that the contents of the extruder container or cartridge can become unusable after a relatively short storage time. However, trapped air pockets due to lack of venting when inserting the bottom cover are also a serious disadvantage of non-curing masses, since the enclosed and 20 compressed air is tensioned during the pressing of the bottom of the container, thus discharging the mass from the container is uneven and interrupted, and the desired uniform delivery of the mass, e.g. in the case of sealing or grouting work, it is no longer possible, which means that the work result is useless.
25 Formålet med opfindelsen er et tilvejebringe et bundlukke af den indledningsvis nævnte art, der på samme tid opfylder de foran beskrevne krav fuldstændigt og upåklageligt, og som samtidig er af en særlig enkel konstruktion, der er egnet til praktisk talt alle anvendelsestiifælde, herunder også en ikke mekanisk betjening af 30 udpresserstemplet.The object of the invention is to provide a bottom closure of the type mentioned initially, which at the same time fully and impeccably fulfills the requirements described above, and which is at the same time of a particularly simple construction suitable for virtually all use cases, including a not mechanical operation of the 30 extruder piston.
Denne opgave løses ifølge opfindelsen ved, at hvert af de omløbende mellemrum mellem tætningslæberne over i det mindste én gennemstrømningsåbning med lille tværsnit stir i forbindelse med forridsrummet, med hinanden og med det tilgrænsende ringrum mellem 35 hulstempelafsnittet og beholderens indervæg. Dette bundlukke har derfor som i materialet ekstra udformede organer kun de i stempelafsnittets materiale formede tætningslæber, således at der opnås en meget enkel konstruktion med deraf følgende forenkling af fremstillingen. Ved indsætningen af bundlukket i strengpressebeholderen, 3This task is solved according to the invention in that each of the circumferential spaces between the sealing lips over at least one small cross-sectional flow opening is in contact with the front chamber, with each other and with the adjacent annular space between the hollow piston section and the inner wall of the container. This bottom closure, therefore, as in the material extra-shaped, has only the sealing lips formed in the material of the piston section, so that a very simple construction is obtained with the consequent simplification of the manufacture. When inserting the bottom cap into the string press container, 3
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efter dennes opfyldning med plastisk masse, kan den foran bundlukket indesluttede luft nemt undvige gennem mellemrummene og gennemstrømningsåbningen eller -åbningerne. Føringen af bundlukket mod strengpressebeholderens indervæg tillader luft at passere, således at 5 al luften kan slippe ud. På grund af tætningslæbekammenes friktionsindgreb med strengpressebeholderens indervæg fås en forspænding af tætningslæberne mod strengpressebeholderens indervæg og dermed et forholdsvis højt specifikt tryk af tætningslæbernes kamme mod strengpressebeholderens indervæg. Derved afstryges de eventuelt på streng-10 pressebeholderens indervæg vedhæftende rester af den plastiske masse effektivt. Ved afslutning af indsætningen samt ved brugen af bundlukket som udpresserstempel på anvendelsesstedet kan den plastiske masse trænge et lille stykke ind i mellemrummene, men dog tilstrækkeligt til at sikre fuldstændig aftætning. Mellemrummenes frie 15 tværsnit og gennemstrømningsåbningerne og/eller trykket til indsætning eller udtrykning af bundlukket kan vælges under hensyntagen til den plastiske masses viskositet for at bestemme målet for massens indtrængning i mellemrummene og dermed aftætningen. Tætningslæbernes og mellemrummenes samt gennemstrømningsåbningernes tværsnit og 20 antal kan i hvert enkelt tilfælde vælges således, at den plastiske masse som følge af et lille frit tværsnit med deraf følgende modstand med sikkerhed hindres i at trænge gennem mellemrummene i hele deres længde. Det har vist sig, at de påkrævede løsbrydningskræfter for et på denne måde udformet udpresserstempel er meget små.after filling it with plastic mass, the air entrapped in front of the bottom cover can easily evade through the gaps and flow opening (s). The passage of the bottom cover against the inner wall of the extruder container allows air to pass, so that all the air can escape. Due to the frictional engagement of the sealing lip combs with the inner wall of the extruder container, a biasing of the sealing lips against the inner wall of the extruded container is obtained and thus a relatively high specific pressure of the seals of the sealing lips against the inner wall of the extruded press container. Thereby, they are effectively stripped of residues of the plastic pulp effectively on the inner wall of the string container. At the end of insertion and when using the bottom cap as an extruder piston at the point of application, the plastic mass can penetrate a small distance into the spaces, but sufficient to ensure complete sealing. The free cross-sections of the gaps and the flow openings and / or the pressure for inserting or expressing the bottom cover can be selected taking into account the viscosity of the plastic pulp to determine the measure of the penetration of the pulp into the gaps and thus the seal. The cross-section and number of seals of the sealing lips and gaps as well as the flow openings can be selected in each case, so that the plastic mass due to a small free cross-section with the resulting resistance is prevented from penetrating the gaps throughout their length. It has been found that the required breaking breaking forces for a plunger stamped in this way are very small.
25 En udførelsesform for opfindelsen er ejendommelig ved, at tætningslæberne er udformede som i hulstempelafsnittets elastiske materiale formede og på hulstempelafsnittets yderside forløbende skruegænger, hvis kamme med friktionsindgreb lægger sig mod strengpressebeholderens indervæg. Det mellem skruegængerne dannede 30 mellemrum danner samtidig gennemstrømningsåbningen for luften og til indtrængning af den plastiske masse, som foran beskrevet.An embodiment of the invention is characterized in that the sealing lips are formed as formed in the elastic material of the hollow piston section and screw threads extending on the outside of the hollow piston section, whose friction-engaging ridges lie against the inner wall of the extruder container. The 30 spaces formed between the screw threads simultaneously form the air opening for the air and for the penetration of the plastic mass as described above.
En særlig enkel føring af hulstempelafsnittet mod strengpressebeholderens indervæg opnås ifølge en udførelsesform for opfindelsen ved, at i det mindste det hulstempelafsnit, der er belig-35 gende mellem skruegængerne eller tætningslæberne og den hen mod påfyldningsåbningen vendende bageste ende af hulstemplet udvider sig konisk hen mod denne ende på en sådan måde, at hulstempelafsnittet ved denne bageste ende styres af strengpressebeholderens indervæg. En sådan konisk form er enkel at fremstille og medfører 4A particularly simple guide of the hollow piston section towards the inner wall of the extruder container is achieved in accordance with an embodiment of the invention in that at least the hollow piston portion lying between the screw threads or sealing lips and the rear end of the hollow piston extending towards the filling opening is tapered. end in such a way that the hollow piston section at this rear end is guided by the inner wall of the extruder. Such a tapered shape is simple to manufacture and entails 4
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samtidig en upåklagelig føring af stemplet og sikrer desuden mulighed for den undvigende luft at slippe igennem. Vægtykkelsen af udpresserstemplet og navnlig af det koniske hulstempeiafsnit kan være dimensioneret under hensyntagen til den ønskede elasticitet og herun-5 der navnlig holdes særlig tynd.at the same time an impeccable guide of the piston and also ensures the opportunity for the evasive air to pass through. The wall thickness of the extruder piston and, in particular, of the tapered hollow piston section may be sized taking into account the desired elasticity and, in particular, being particularly thin.
En yderligere virkning, som bidrager til de beskrevne funktioner af skruegængerne og hulstempelafsnittets koniske del, opnås i en videreudformning af opfindelsen ved, at den ved den bageste ende beliggende største udvendige diameter af det koniske 10 hulstempeiafsnit er lidt mindre end skruegængernes udvendige diame ter. Derved overtager den bageste ende af hulstempelafsnittet rene føringsopgaver, medens skruegængernes kamme tilvejebringer det ønskede høje anlægstryk mod strengpressebeholderens indervæg.A further effect contributing to the described functions of the screw threads and the conical portion of the hollow piston section is obtained in a further embodiment of the invention in that the largest outer diameter of the conical 10 hollow piston section located at the rear end is slightly smaller than the external diameters of the screw threads. Thereby, the rear end of the hollow piston section assumes clean guiding tasks, while the combs of the screw threads provide the desired high abutment pressure against the inner wall of the extruder container.
I forbindelse med bundlukkets som tætningsmiddel anvendte 15 skruegange er det ifølge en yderligere udførelsesform for opfindelsen hensigtsmæssigt, dersom lukkeskiven er kegleformet hvælvet udad.In accordance with a further embodiment of the invention, in connection with the 15 screw threads used as the sealant, it is expedient if the closure disc is cone-shaped vaulted outwards.
Dette bidrager ved indsætningen samt også ved bundlukkets anvendelse den ønskede fortrængning af den plastiske masse hen mod skruegængerne.This contributes to the desired displacement of the plastic mass towards the screw threads when inserting and also with the use of the bottom cover.
20 Ifølge yderligere en fordelagtig udførelsesform for bundluk ket ifølge opfindelsen kan tætningslæberne være udformede som koak-siale ringe, som hver har en udsparing, der danner en gennemstrømningsåbning i stemplets længderetning, og de efter hinanden følgende ringes udsparinger være anbragte forskudt for hinanden i omkreds-25 retningen. Herved opnås mulighed for på særlig enkel måde at fremstille bundlukker til brug ved plastiske masser med forskellig viskositet, idet der hertil blot kræves passende dimensionering af udsparingerne.According to a further advantageous embodiment of the bottom closure according to the invention, the sealing lips may be formed as coaxial rings, each having a recess which forms a longitudinal flow through the piston and the successive rings' recesses are disposed perpendicular to each other. 25 direction. Hereby, it is possible in a particularly simple way to make bottom closures for use with plastic masses of different viscosity, requiring only appropriate dimensioning of the recesses.
Ifølge en videre udførelsesform for opfindelsen kan dels 30 tætningsvirkningen og dels også gennemgangs- eller indtrængningsvirkningen varieres og påvirkes ved, at de koaksiale ringe udformes bølge- eller zigzagformede i om kreds retningen. Herved opnås der mulighed for på sikker made at påvirke og vælge gennemstrømningsmodstanden mellem de koaksiale ringe, idet antallet og tværsnitsfladen 35 af de pågældende udsparinger kan dimensioneres på passende måde. I en videreudformning af opfindelsen er udsparingerne hensigtsmæssigt anbragte i de bølge- eller zigzagformede ringes kamme.According to a further embodiment of the invention, partly the sealing effect and partly also the penetration or penetration effect can be varied and influenced by the coaxial rings being formed in a wavy or zigzag shape in the circumferential direction. Hereby it is possible to safely influence and select the flow resistance between the coaxial rings, since the number and cross-sectional surface 35 of the recesses in question can be appropriately sized. In a further embodiment of the invention, the recesses are conveniently placed in the ridges of the corrugated or zigzag shaped rings.
I det følgende beskrives udførelsesformer for bundlukket ifølge opfindelsen nærmere under henvisning til tegningen. Pi tegnin-In the following, embodiments of the bottom lid according to the invention are described in more detail with reference to the drawing. Pi technical
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5 gen viser:5 gene shows:
Fig. 1 et sidebillede af et som udpresserstempel tjenende bundlukke ifølge opfindelsen, fig. 2 et længdesnit gennem en til det i fig. 1 viste 5 lukke hørende og med plastisk masse opfyldt strengpressebeholder, inden lukkets indsætning, fig. 3 i større målestok den ved påfyldningsåbningen beliggende del af strengpressebeholderen med det indsatte lukke, idet strengpressebeholderen er 10 vist i længdesnit, fig. 4 et sidebillede af et som udpresserstempel tjenende lukke ifølge opfindelsen i en anden udførelsesform, fig. 5 en plantegning af det i fig. 4 viste lukke, fig. 6 det i fig. 4 viste lukke i større målestok, 15 fig. 7 et til fig. 4 svarende billede af en trejde udfø relsesform for et lukke ifølge opfindelsen, fig. 8 en plantegning af det i fig. 7 viste lukke, og fig. 9 det i fig. 7 viste lukke i større målestok.FIG. 1 is a side view of a bottom cap serving as an extruder stamp according to the invention; FIG. 2 is a longitudinal section through one to the one in FIG. 1 shows the closure associated with plastic mass filled with extruder, before insertion of the closure; FIG. 3 is an enlarged view of the portion of the extruder container with the insert closed at the filling opening, the extruder container 10 being shown in longitudinal section; FIG. 4 is a side view of an extinguishing piston serving according to the invention in another embodiment; FIG. 5 is a plan view of the embodiment of FIG. 4; FIG. 6 shows the embodiment of FIG. 4 on a larger scale, FIG. 7 is a view of FIG. Figure 4 is a similar view of a third embodiment of a closure according to the invention; 8 is a plan view of the embodiment of FIG. 7, and FIG. 9 shows that in FIG. 7 on a larger scale.
Det i fig. 1 og 3 viste som udpresserstempel tjenende lukke 20 i består af elastisk materiale, fortrinsvis af elastisk formstof. Lukket 1 har en i retningen hen mod strengpressebeholderen 5's forridsrum konveks, nemlig kegleformet udhvælvet lukkeskive 4, samt et hul-stempelafsnit 2, der strækker sig i retningen hen mod strengpressebeholderen 5's påfyldningsåbning 5a. Hulstempelafsnittet 2 er ved 25 dets mod lukkeskiven 4 vendende ende på et cylindrisk afsnit forsynet med tætningsorganer for den plastiske masse, nemlig med i hulstempelafsnittets elastiske materiale formede og på ydervæggen af hulstempelafsnittet 2's cylindriske del forløbende skruegænger 3.The FIG. 1 and 3, the closure 20 serving as an extruder piston is comprised of elastic material, preferably of elastic resin. The closure 1 has a convex convex in the direction towards the bore of the extruder 5, namely cone-shaped vaulted closure disc 4, and a hollow piston portion 2 extending in the direction of the bore 5 of the extruder 5. The hollow piston section 2 is provided at its end facing the closure disc 4 with a cylindrical section provided with sealing means for the plastic mass, namely, formed in the elastic material of the hollow piston section and extending on the outer wall of the cylindrical section 2 of the hollow piston section 2.
Antallet af skruegænger, fortrinsvis tre til fire skruegæn-30 ger, kan vælges efter de hyppigst anvendte plastiske masser. Lukkeskiven 4 kan også være hvælvet udad i en anden form.The number of screw threads, preferably three to four screw threads, can be selected according to the most frequently used plastic masses. The closure disc 4 may also be curved outwardly in another form.
Som det tydeligt ses i fig. 1 og 3, er i det mindste det hulstempelafsnit, der er beliggende mellem skruegængerne 3 og den mod pifyldningsåbningen vendende bageste ende af lukket, udformet 35 konisk udvidet hen mod denne åbne ende på en sådan måde, at dette hulstempelafsnit ved dets bageste ende styres af strengpressebehol-derens indervæg, således som vist i fig. 3. Samtidig er den ved den bageste ende beliggende største diameter af det koniske hulstempel-afsnit 2 lidt mindre end den udvendige diameter af skruegængerne 3.As is clearly seen in FIG. 1 and 3, at least the hollow piston portion located between the screw threads 3 and the rear end of the closure opening is formed conically extended towards this open end in such a way that this hollow piston portion is controlled at its rear end. the inner wall of the extruder container, as shown in FIG. 3. At the same time, the largest diameter of the tapered piston section 2 located at the rear end is slightly smaller than the outer diameter of the screw threads 3.
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66
Begge disse udvendige diametre har dog det tilstrækkelige overmål i forhold til strengpressebeholderens indvendige diameter til, at der dels opnas, at skruegængernes kamme tætnende ligger an mod streng-pressebeholderen 5‘s indervæg, og dels at føringen af hulstempelafsnit-5 tet 2 mod denne indervæg sikres. Dette ses i fig. 3.However, both of these outer diameters have sufficient oversize with respect to the inside diameter of the extruder container that it is partly obtained that the cams of the screw threads sealingly abut the inner wall of the extruder 5 and secondly that the guide of the hollow piston section 5 towards this inner wall. ensured. This can be seen in FIG. Third
Fig. 2 viser navnlig den ved pifyldningsibningen 5a beliggende åbne ende af strengpressebeholderen 5 med den indfyldte plastiske masse 6. Det vil ses, at den bageste overflade af den indfyldte masse 6 efter påfyldningen er meget uregelmæssig og meget 10 ofte over en del af den cirkulære overflade har en højere beliggende kant 7.FIG. 2, in particular, shows the open end of the filling press container 5a located at the extruder container 5 with the filled plastic mass 6. It will be seen that the back surface of the filled mass 6 after filling is very irregular and very often over part of the circular surface. a higher perimeter 7.
Ved indpresningen af lukket 1 i den således opfyldte streng-pressebeholder henholdsvis i den på denne måde fyldte patron 5 kan den foran lukket 1's lukkeskive 4 indesluttede luft nemt undvige 15 gennem det frie mellemrum mellem skruegængerne 3. Navnlig ved passende dimensionering af hulstempelafsnittet 2's vægtykkelse opnås, at luften, som trænger ind mellem skruegængerne, nemt kan slippe ud ved den bageste ende af lukket henholdsvis af hulstempelafsnittet 2, hvormed lukket føres langs den indvendige væg af strengpresse-20 beholderen. De under friktion og dermed under forspænding mod patronen 5‘s indvendige væg liggende kamme af skruegængerne 3 udøver et så stort specifikt tryk mod patronen 5's indervæg, at de på indervæggen vedhæftende rester af den plastiske masse af stryges effektivt, således at der efter indsætningen opnås det i fig. 3 viste 25 resultat. Det frie tværsnit af skruegængerne 3 og/eller trykket mod lukket 1 vælges alt efter massens viskositet på en sådan måde, at den plastiske masse 6 i lukket 1‘s i fig. 3 viste slutstilling trænger ind i det frie tværsnit mellem skruegængerne 3 fortrinsvis over den halve omkreds, således som vist ved 8 i fig. 3. På grund af det i Øvrigt 30 lille frie mellemrum mellem skruegængerne 3 forhindres den plastiske masse 6 i at trænge ind mellem skruegængerne i hele deres længde. Lukket 1 henholdsvis udpresserstemplet er derefter fuldstændig aftættet i dets skruegænger, således at udpresserstemplet også kan betjenes ved hjælp af gasformige midler, idet løsbrydningsmomentet er 35 lille.By pressing the closure 1 into the string compartment thus filled, respectively, in the cartridge 5 thus filled, the air entrapped in front of the closure disc 4 can easily evade 15 through the free space between the screw threads 3. Particularly by appropriate dimensioning of the wall thickness of the hollow piston section 2 is achieved. the air entering between the screw threads can easily escape at the rear end of the closure or of the hollow piston section 2, respectively, through which the closure is conducted along the inner wall of the extruder container. The crests 3 of the screw threads 3, under friction and thus under bias against the inner wall of the cartridge 5, exert such a specific pressure on the inner wall of the cartridge 5 that the residues of the plastic mass of the plastic are effectively ironed so that after insertion it is obtained. FIG. 3 showed 25 results. The free cross-section of the screw threads 3 and / or the pressure against the closure 1 is selected according to the viscosity of the mass in such a way that the plastic mass 6 in the closure 1 of FIG. 3, in the free cross-section between the screw threads 3, preferably over the half circumference, as shown at 8 in FIG. 3. Due to the small free space between the screw threads 3, otherwise, the plastic mass 6 is prevented from penetrating the screw threads throughout their length. The closure 1 and the extruder piston, respectively, are then completely sealed in its screw threads, so that the extruder piston can also be operated by gaseous means, with the breaking torque being small.
I fig. 4 til 9 er af hensyn til tydeligheden strengpressebeholderen henholdsvis patronen, som optager lukket ifølge opfindelsen, ikke vist.In FIG. 4 to 9 are not shown for the sake of clarity of the extruder container and the cartridge which accepts the closure according to the invention.
Det i fig. 4 og 7 viste som udpresserstempel tjenende lukkeThe FIG. 4 and 7 shown as the extruder stamp serving closing
DK 152913 BDK 152913 B
7 11 henholdsvis 21 består af elastisk materiale, fortrinsvis af elastisk formstof. Lukket 11 henholdsvis 21 har hver en kegleformet udhvæl-vet lukkeskive 14 henholdsvis 24 samt et i retningen mod påfyldningsåbningen af den ikke viste strengpressebeholder vendende hulstem-5 pelafsnit 12 henholdsvis 22. På dets mod lukkeskiven 14 vendende ende er huistempelafsnittet 12 henholdsvis 22 forsynet med tætningslæberne for den plastiske masse, som er viste i hver sin forskellige udformning i de i fig. 4-9 viste udførelsesformer.7 11 and 21 respectively consist of elastic material, preferably of elastic resin. The closure 11 and 21, respectively, each have a cone-shaped curved disc 14 and 24, respectively, and a hollow piston portion 12 facing the filling opening of the non-extruded press container 12 not shown. At its end facing the closure disc 14, the housing piston section 12 and 22 are respectively provided with the sealing lips. for the plastic mass shown in different designs in the figures shown in FIG. 4-9.
Ved den i fig. 4-6 viste udførelsesform er tætnings læberns 10 udformede som flere set i stemplets længderetning bag hinanden beliggende og på huistempelafsnittet 12's yderside forløbende koaksiaS© ringe 13, der er udformede i huistempelafsnittet 12's elastisk® materiale, og hvis kamme med friktionsvirkning ligger an mod indervæggen af den ikke viste strengpressebeholder. Mellem de koaksiale ringe 15 13 er der således dannet omkringløbende mellemrum 15. Disse omkring- løbende mellemrum 15 er i den viste udførelsesform over tre i hver sin af de koaksiale ringe 13 i omkredsretningen i forhold til hinanden fordelt anbragte udsparinger 16 forbundne med hinanden samt med det påfølgende ringrum mellem huistempelafsnittet 12 og indervæggen 20 af den ikke viste strengpressebeholder. De enkelte koaksiale ringe 13's udsparinger 16 er i omkredsretningen forskudt i forhold til hinanden, hvilket navnlig ses i fig. 6. Derved opnås, at den ved indsætningen af udpresserstemplet foran den påfyldte plastiske masse beliggende luft kan undvige gennem udsparingerne 16 og mellemrum-25 mene 15, og den plastiske masse kan ved afslutningen af lukkets indsætning og ved den senere betjening af udpresserstemplet trænge det ønskede stykke gennem udsparingerne 16 ind i de ringformede mellemrum 15, idet den Ønskede modstand kan indstilles ved hjælp af den forskudte stilling af udsparingerne 16 i forhold til hinanden, samt 30 ved hjælp af deres antal og gennemgangstværsnit.In the embodiment shown in FIG. 4-6, the sealing lips 10 are configured as seen in the longitudinal direction of the piston one behind the other and extending coaxial rings 13 extending on the outside of the housing piston section 12, which are formed in the elastic® material of the housing piston section 12 and whose friction-impact cams abut the inner wall. the string press container not shown. Thus, circumferential spacers 15 are formed between the coaxial rings 15 13 and these recesses 15 are in the illustrated embodiment of three recesses 16 connected to each other and to each other of the coaxial rings 13 in the circumferential direction. the subsequent annulus between the housing temple section 12 and the inner wall 20 of the extrusion container not shown. The recesses 16 of the individual coaxial rings 13 are offset relative to one another in the circumferential direction, as seen in particular in FIG. 6. It is thus achieved that the air located in the insertion of the extruder piston in front of the filled plastic mass can evade through the recesses 16 and the spaces 15, and the plastic mass can penetrate at the end of the closure insertion and later operation of the extruder piston. section through the recesses 16 into the annular spaces 15, the desired resistance being adjustable by means of the offset position of the recesses 16 relative to each other, and 30 by their number and cross-sections.
Ved den i fig. 7-9 viste udførelsesform er der ligeledes som tætningslæber anbragt flere set i stemplets længderetning bag hinanden anbragte og på huistempelafsnittet 22's ydervæg forløbende koaksiale ringe 23, som er formede i stemplets elastiske materiale. Disse 35 koaksiale ringe er imidlertid bølge- eller siksakformede, således som det eksempelvis er anskueliggjort i fig. 7 og 9. Derved dannes mæ-anderformede mellemrum 25 mellem de koaksiale ringe 23. Ved den i fig. 7-9 viste udførelsesform er der endvidere i de koaksiale ringe 23's kamme anbragte i omkredsretningen i forhold til hinanden for- 8In the embodiment shown in FIG. 7-9, sealing lips are also arranged one behind the other in the longitudinal direction of the piston and coaxial rings 23 extending on the outer wall of the housing piston section 22 formed in the elastic material of the piston. However, these coaxial rings are corrugated or zigzag shaped, as illustrated in FIG. 7 and 9. Thus, shaped spaces 25 are formed between the coaxial rings 23. In the embodiment shown in FIG. 7-9, in the circumferential direction of the coaxial rings 23, are also arranged in relation to each other.
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skudte udsparinger 26, der har samme funktion som de foran beskrevne udsparinger 16. Også denne udførelsesform har som gennemgangsåbninger tre i omkredsretningen fordelte udsparinger 26. Anbringelsesmåden og antallet af udsparinger i de enkelte koaksiale ringe 23 5 henholdsvis 13 kan dog også vælges forskelligt for på denne måde at indstille den ønskede gennemgangsmodstand for den plastiske masse.shot recesses 26 having the same function as the recesses described above 16. Also, this embodiment has as recess openings three recesses distributed in the circumferential direction 26. However, the method and number of recesses in the individual coaxial rings 23 5 and 13 can also be chosen differently for this way to set the desired throughput resistance for the plastic mass.
Også her er en yderligere variation mulig ved dimensioneringen og antallet af de koaksiale ringe 23 samt deres bølge- eller siksakudform-ning og indbyrdes afstand.Here, too, further variation is possible in the sizing and number of coaxial rings 23, as well as their wave or zigzag shape and spacing.
10 15 20 25 30 3510 15 20 25 30 35
Claims (8)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742442354 DE2442354C3 (en) | 1974-09-04 | Bottom closure made of elastic material and serving as an ejection piston for viscoplastic masses for a hollow cylindrical extrusion container | |
| DE2442354 | 1974-09-04 | ||
| DE19752531322 DE2531322C2 (en) | 1975-07-12 | Bottom closure made of elastic material and serving as an ejection piston for viscoplastic masses for a hollow cylindrical extrusion container | |
| DE2531322 | 1975-07-12 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK395475A DK395475A (en) | 1976-03-05 |
| DK152913B true DK152913B (en) | 1988-05-30 |
| DK152913C DK152913C (en) | 1988-12-05 |
Family
ID=25767643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK395475A DK152913C (en) | 1974-09-04 | 1975-09-03 | BOTTLES OF ELASTIC MATERIAL FOR A HOLY CYLINDRIC STRESS PRESSURE CONTAINER USING AS EXPRESSION STAMP FOR PLASTIC MASSES |
Country Status (6)
| Country | Link |
|---|---|
| CH (1) | CH598070A5 (en) |
| DK (1) | DK152913C (en) |
| FR (1) | FR2283829A1 (en) |
| GB (1) | GB1475430A (en) |
| IT (1) | IT1047153B (en) |
| NL (1) | NL170257C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2197425B (en) * | 1986-11-12 | 1990-02-28 | Metal Box Plc | Pistons for pressure-dispensing containers |
| DE20010417U1 (en) | 2000-06-09 | 2001-10-11 | Sulzer Chemtech Ag, Winterthur | Bleeding device for a piston for a cartridge |
| DE10040732C2 (en) | 2000-08-17 | 2002-11-07 | 3M Espe Ag | Slotted piston |
| GB0721774D0 (en) | 2007-11-07 | 2007-12-19 | 3M Innovative Properties Co | one-piece vented piston |
| WO2011017181A1 (en) | 2009-08-04 | 2011-02-10 | 3M Innovative Properties Company | Dispensing device with pressure release |
| USD657876S1 (en) | 2010-02-02 | 2012-04-17 | 3M Innovative Properties Company | Dental capsule |
| US9668826B2 (en) | 2013-11-06 | 2017-06-06 | 3M Innovative Properties Company | Handheld viscous dental paste dispenser |
| JP2017500097A (en) | 2013-11-25 | 2017-01-05 | スリーエム イノベイティブ プロパティズ カンパニー | Apparatus for dispensing composition and method for dispensing composition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT297577B (en) * | 1968-10-31 | 1972-03-27 | Otto Berkmueller | Tube or the like. Hollow cylindrical container for storing and dispensing a liquid or pasty product |
| DE7400492U (en) * | 1974-05-16 | Kettenbach A Fabrikation Chem.Erzeugnisse | Dosing device designed as a pack for flowable goods with particularly high viscosity |
-
1975
- 1975-08-15 CH CH1067175A patent/CH598070A5/xx not_active IP Right Cessation
- 1975-08-20 GB GB3469175A patent/GB1475430A/en not_active Expired
- 1975-08-22 FR FR7526019A patent/FR2283829A1/en active Granted
- 1975-09-01 IT IT6917975A patent/IT1047153B/en active
- 1975-09-03 DK DK395475A patent/DK152913C/en not_active IP Right Cessation
- 1975-09-03 NL NL7510379A patent/NL170257C/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7400492U (en) * | 1974-05-16 | Kettenbach A Fabrikation Chem.Erzeugnisse | Dosing device designed as a pack for flowable goods with particularly high viscosity | |
| AT297577B (en) * | 1968-10-31 | 1972-03-27 | Otto Berkmueller | Tube or the like. Hollow cylindrical container for storing and dispensing a liquid or pasty product |
Also Published As
| Publication number | Publication date |
|---|---|
| NL170257C (en) | 1982-10-18 |
| FR2283829A1 (en) | 1976-04-02 |
| IT1047153B (en) | 1980-09-10 |
| FR2283829B1 (en) | 1981-01-02 |
| CH598070A5 (en) | 1978-04-28 |
| GB1475430A (en) | 1977-06-01 |
| NL170257B (en) | 1982-05-17 |
| NL7510379A (en) | 1976-03-08 |
| DK395475A (en) | 1976-03-05 |
| DE2531322B1 (en) | 1977-01-13 |
| DK152913C (en) | 1988-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |