DE1729101A1 - Process for the production of closed and open containers and molded parts made of plastics and containers and molded parts produced in this way - Google Patents

Description

Int. Cl .:

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

B29d

German class: 39 a3, 27/00

Offenlegungsschrift 1729 101

File number: P 17 29 101.9 Filing date: November 28, 1967

Disclosure date: June 3, 1971

Exhibition priority: -

Union priority Date: Country:
File number:

Description:

Addition to: Eliminated from: Applicant: Process for the production of closed and open containers and molded parts made of plastics and containers and molded parts produced in this way

Thermovox GmbH Kunststoffmaschinen, 7304 Ruit

Representative:

Named as inventor: Vox, Anton J., 7304 Ruit Notification in accordance with Art. 7, Section 1, Paragraph 2, No. 1 d. Ges. V. 4.9.1967 (BGBI. IS. 960): 28. 1.1969

ORIGINAL INSPECTED

• 5.71 109823/1933 9/90

Company. ίharmovox GmbH plastic machines 73Q4 Ruit

D-7300 Esslingen Katharinenstrasse 13

now: i \ ;; iib ',: [; ersfr. 32A Telephone Stuttgart (0711) 359992 cable «hakepat» essiingenneckar

Deutsche Bank Esslingen 210S06 Postscheckamt Stuttgart 10004 Chase Manhattan Bank New York

17291C1

New version July 24, 1969

Anuial file

l · '/ 7 2 ⁽ J

Ancestors for making υοη closed and open containers and molded parts made of plastics and manufactured in this way Containers and molded parts.

The invention relates to a l / experience for the production of closed and open containers and molded parts made of plastics in the melting process and also after this ! / experienced closed ones produced in the melting process or open containers or molded parts made of plastic.

Closed and open containers and molded parts Plastic, that is to say more or less pronounced hollow bodies, have so far been produced in such a way that their üJandung is single-layer or double-layer. the Manufacture of single-layer containers is common in many Arton known, e.g. B. by blowing ', spraying, Uakuumziohon or rotational molding, the latter using in

New documents (Art7iiAi ".2Hr.i8" txs "iMXndwui" mM.v.4.9.iM7l 109823/1933

• in ·· larding processes a melted layer of Plastic distributed. The invention relates to theeea the latter method.

Containers with a single-layer wall are temperature-controlled and strength only up to a certain Crad durable. Accordingly, you can only have up to one certain CrSOe produced «. The invention is based on the task of "especially large-volume To produce hollow bodies or molded parts that previously could not be produced seamlessly in one piece. In size comparable container solion both TempereturmäOlg all features also earth more resilient «.

Attempts have already been made to produce hollow bodies with double-layer walls by first producing a single-sided hollow body and then in A more pus layer is applied to a pus work process. The disadvantage here is that it becomes too This duplicate production is another work that is difficult to carry out, especially in relation to the individual subjects. Furthermore, a correct connection of different types of plastics is not given if the erete Layer fully formed and only then the second Layer is applied. 01 · mechanical and

temperature-sensitive properties of such containers and 109823/1933

Molded parts are also inadequate bokanntex'iveitte Sclvulerigkoiten by default in the Cool and bad form halfcung, goringa accuracy eu; the shrinkage «. Difjse difficulties are

in the case of the confessed eiriischicntigon fls the double-layer made in the pre-drilled manner Plastic parts available «

The solution according to the invention provides the solution to the problem posed Process for the production of closed and open containers and molded parts from plastics in Melting process characterized in that melted in one operation by means of layered distribution Plastic after fusing plastic to form a first layer (outer landing) a second (middle) plastic layer is formed with the addition of a propellant and is seamless and homogeneous with the first 5 layer (outer landing) is fused, whereupon a third plastic layer (inner landing) is formed and fused seamlessly and homogeneously with the second (middle) layer. Adequate compliance The middle layer is created with the help of the propellant formed stronger in the wall than the outer and / or inner wall.

(What is essential in the invention is the distribution of the plastic in layers in one operation while a z. B. closed except for pipe sockets

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BAD LOCAL

Container in the melting process, i.e. by means of a Rotation process is manufactured. This defl the individual layers formed in one * work step «ground and merge homogeneously and nehtlo * with one another, results in an excellent connection that at excellent temperature and feet comfort Leads to properties, it also makes it possible to to create large-volume bodies that seamlessly fit together for a long time could not be manufactured in one piece «, e.g. Refuel with a Faaaungavarmttgen bia to 50 000 1.

By changing the additions in the Kunatatoff of one stratum in relation to the other strata "honoring _; the real distribution of the individual Kunetoffmangen, aleo z. 8 "by adding a propellant to" Kunetetoff the middle layer, I also add auagazalchnata laollariechnieche Vartalla. Different * "strengths and differences in contact with other people lead to a wide range of possibilities within the scope of the invention. Tests showed that parts made quietly in the invention, -which elao from maliraren homogeneous and seamlessly mitactde, r fused layers, withstand temperatures of -40 ° C, and also showed no formation or tension. Impact and drop tests could not destroy the interior. Oeeeelbe was produced at a temperature of ♦ 70 ° C · The Kelt ·? u »d ■>. ■ -. ;;

Warmvets searches were carried out continuously for 24 hours 109823/1933

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leads. An insert made of steel, polyamide or glass fiber fabric is preferably melted into the middle layer. As a result, the banks of the cold, warning and impact tests are significantly improved. It is important that the middle layer is a different one Strength than the outer or inner wall "

Compression tests on large-volume bodies which were produced according to the invention showed properties that were 125% better than those of the known single-layer or the two-layer containers described at the outset. The compressive strength tests were carried out up to 10 atU.

It is essential that according to the invention, the various Layers have their own temperature and strength values own. Blown, injection-molded, vacuum-drawn and rotstion-molded single-layer sheets and molded parts and also held double-layer parts produced in the manner described above the aforementioned cult, heat, impact and pressure tests, which comparable containers manufactured according to the method according to the invention withstood, did not stand.

The invention can be used for the production of all types of containers and molded parts made of plastic

109823/1933

or plastic connection. With a preferred one The outer wall is made of polyethylene, the middle layer is made of polyethylene with propellant and the inner wall is made of polyethylene. Outwardly protruding screws, straps, retaining rings, hinges made of (detail or polyamide are usually only used in the outer landing and in the middle one Layer melted down. In this respect, connections plastic - metal - plastic or Rietall - plastic are possible. The embedding of metal parts, Fittings, etc. in the middle layer has the advantage that these parts then through the respective outer Insulation, which is formed by the outer or inner wall, are protected from all influences.

Another major advantage of the invention is the savings in material. The same wall thickness made of one-layer material would weigh 120% more. The same wall thickness made of two-layer material according to the other method described at the beginning would weigh 80% more. Due to the layering according to the invention, in that the inner and outer sheaths are solid, homogeneously melted walls and the middle layer gives a foam-like structure, the walls produced according to the invention have greater rustiness than two-layer material produced according to other methods described above. Tensile and shear tests resulted in a 109823/1933

Improvement by öbar 100 ^.

Uleitere details and advantages of the invention he » are given in the following description of examples of embodiments, shown schematically in the drawing, of containers produced by the method according to the invention. Show in the drawing

Tig · 1 a first «execution requirement; in longitudinal section, Fig. 2 shows a cross section along line XI-II in Fig. 1, | 3 shows a second type of hole in longitudinal section, Fig. 4 shows a cross section along line IV-IV in Fig. 3, Fig. S shows a third type of execution in Lengeschnitt, Fig. 6 is a cross section along line VI-VI in Fig. 5, 7 shows a fourth embodiment in longitudinal section, Fig. 8 ″ a cross section along line VIII-VIII in

Fig. 7,

9 shows a fifth type of embodiment in longitudinal section, 10 shows a sixth embodiment in side view

and "

11 shows a seventh embodiment in section.

In Flg. 1 and 2 is the first execution type a to Shown on a molded nozzle 5 closed container, the twist of three honogen and nehtloe consists of layers fused to one another in one operation, namely an external use 1 eus

109823/1933

Polyethylene, a middle layer made of polyethylene with Propellant, which is stronger in the wall than the outer wall 1, and an inner wall 3 as well made of polyethylene. The individual layers are not shown with separate letters in the drawing, because they are fused together homogeneously and seamlessly.

In the Autführerert according to Fig. 3 and 4 is also a container that is closed except for a connecting piece 5 shown, which consists of such three layers 1, 2, consists * In the middle layer 2 an insert made of steel, polyamide or glass fiber fabric is melted down, so firmly connected to the middle layer 2. In a manner not shown, the middle layer also be interspersed with optionally parallel or non-parallel glass fibers

A closed container is shown in FIGS. 5 and 6, which likewise has the layers 1, 2, 3 formed in the manner according to the invention. In the middle layer 2 and the outer wall 1 L ¹ are ash 6 from metal or polyamide is melted, wherein the inner wall 3 is not durchbrochenist '· In the same U / ice screws, retaining rings, hinges can be made of metal odor P lyanid melted sein.-

109823/1933

FJf-i da * AusfühPunciBöi'b narrh Fit? » ? and 3 it is 3ΐκη from &nf'aiis; in a §askhj ifssanen container of which: ΐ.'σϊί <1υης dio erfindungsgamäßen layers 1, 2, 3 wei t, Ourchgshand in al.la dra. layers ain hitüebeatändigs3 Klnsstück 7 melted "

Fig. 9 shows a closed container, in whose inventive multilayer Ulanding a nozzle θ is melted, also through all three layers 1 »2« 3 melted with or without flanges made of Illetel 1 or polyamide and provided with a closable opening to flow into the inside of the container.

In the embodiment according to FIG. 10, openings 9 are present in the container wall, which pass through go every three layers 1, 2, 3.

In the embodiment of FIG. 11 are on the whole Container or molded part ribs 10, wherein the Ulanding also from the layers according to the invention 1, 2, 3 consists. In a similar way, grooves, depressions and ridges can be molded on.

1098? 3/1 <m ^6AD original

Claims (1)

In a manner not shown, know in container or Molded pieces in the middle layer 2 and inside 3 reinforcements must be melted, which also through the outer wall 1 and inner turn 3 * can protrude. The grain sizes of the sole of the materials for the invented layers are 1 »2, can be evenly or unevenly. The invention of oils is not limited to manufacture shown in the drawing shown RuafOhrungeformen. Ce can alia arias of AuefOhrungefornen into consideration «La containers, fog, boats, coal burners, petrol tanks, Oltankβ, Araeturenbrette, tlaktroecheltechrlnka, Wellsnreltbrette, buoys, radio and Farnaahgahluaa, Stacking container, Oruckbehllter, StOhIa and Seeeel, Suitcase »Kanieter, 1011 tons for large! Oiltagen, complete caravans, car bodies, water boiler, Rakat parts, airplane hulls, airplane wings, Beueleoiente, building blocks, meechinengeheuee, Baechinenstands, »aschlnenrahne, Hotorengehäuee» complete Iaolierung for heating and cooling appliances, wbeachalend Parts and CeFaOe for marriage «! See Induetrie, die simultaneously pressurized and 109823/1933 u_ Thermouox GmbH Kunststoffmaschinen 7304 Ruit D-7300 Esslingen Katharinenstr. 13 now: iv'ü'bsrgerstr. S2A Telephone Stuttgart (0711) 359992 cable «hakepat» esslingenneckar Deutsche Bank Esslingen 210S06 Postscheckamt Stuttgart 10004 Chase Manhattan Bank New York New version of July 24, 1969 Acts of anujalt t £ 3 f Ιβ Claims 1. Process for the production of closed and open containers and moldings from plastics in the melting process, characterized in that in one operation by means of layered distribution of melted plastic after the plastic has fused to form a first layer (outer landing) a second (middle) plastic layer formed with the addition of a blowing agent and seamlessly and homogeneously with the first layer (Aussenuiandung) merged, whereupon a third Plastic layer (interior coating) formed and seamless and is fused homogeneously with the second (middle) layer. 2. The method according to claim 1, characterized New documents 109823/1933 indicates that the middle layer is stronger in the wall with the help of the propellant designed as the outer and / or inner wall. 3 · The method according to claim 1 or 2, characterized you know that the outlanding made of polyethylene, the middle layer made of polyethylene with propellant and the interior made of polyethylene are formed. 4. Method according to one of Claims 1 to 3, characterized in that in the middle layer is made of steel, pdyamid or glass fiber fabric is melted down. 5. V / experience according to any one of claims 1-4, characterized in that after Outside protruding screws, straps, retaining rings, hinges made of Rietall or polyamide are only melted into the outer wall and the middle layer will. 6 »Method according to one of claims 1-5, characterized in that a heat-resistant glass piece or socket, closures, pipe connections _p cover, inlet and outlet connections made of metal or polyamide continuously in all three 1 0982 3/1 <m Layered (outer surface, middle layer and inner wall) be melted down. 7 “Closed or closed in the Schraelz process open hold or molded part made of plastic the method according to any one of claims 1-6, d a by characterized in that or an outer wall (1) made of polyethylene, one in one Work process homogeneous and seamless with it pre-melt zone middle layer (2) with thicker walls, bestshend Made of polyethylene with propellant, and an interior coating that is homogeneously and seamlessly fused with it in one operation (3) made of polyethylene. 8. Container or molded part according to claim 7, characterized in that go indicates that in the middle layer (2) aine insert (4) made of steel, polyamide or Glasfasargeuieba is melted down. 9 «container or molded part according to claim 8, characterized characterized in that the middle layer (2) with either parallel or non-parallel oil lying glass fibers is interspersed. 1 0 9 8 7 1 f 1 10 · Behiltsr or molded part according to one of the claims 7-9, characterized in that screws, laughter (6), retaining rings, Hinges made of betall or polyamide only in the outer wall (1) and in the ittier layer (2) are melted and the inner wall (3) ieaaen uninterrupted. 11. Container or Foretell according to one of the claims 1 - 10, characterized in that a heat-sealed GlaaatQck (7) or nozzle (β). Closures, pipe connections, Lid, inlet and outlet connections made of metal or polyamide in three layers (outer wall, middle loop and inner turn) melted down. 109823/1933 iS Blank page