DE1729106A1 - Process for the production of closed and open containers and molded parts from plastics and containers and molded parts produced in this way - Google Patents

Description

UBrfahren to manufacture υοη closed and open containers and molded tails made of plastics and on dioso ^! Jeise manufactsllta containers and molded parts.

The invention relates to a method for producing i / on closed and open containers and molded parts Art work in the sphmelting process and furthermore after this Closed or open containers or molded parts made of plastic produced in the melting process.

and open containers and molded parts made of plastic, i.e. fflah * or, in other words, very pronounced hollow bodies, have hitherto been horstolled in such a way that their walls are single-layered or double-layered. The division of single-layer containers is known in uielon hvteu , e.g. B "by blowing, syringing, vacuum drawing or rotation. In the latter case, in

1 ^ 09823/1938

bad original

a melted layer of Plastic distributed “The Erfirtdorig concerns diet es the latter method.

Containers with a single-layer wall a! temperature- and feeble-like only to a certain degree durable. Accordingly, they can only go up to eihur certain size flocks produced. The invention is based on the object, in particular large-volume Hollow body or. Manufacture molded parts that previously could not be manufactured seamlessly in one piece. Containers of comparable size should be able to withstand higher loads in terms of both temperature and strength.

Attempts have already been made to produce hollow bodies with double walls by first producing a single-layer hollow body and then in another layer is applied in a further operation. The disadvantage here is that it is too this double reporting requires a further working day, especially with regard to the one * some fflateriaiarten very difficult to carry out Jrst. Furthermore, a perfect connection is different- ' like Kunntetoffe not given if the first Layer formed and then only the second Layer is applied. The mecharrises and Temperturmößitjen cigenechafton such containers and 109823 / IMe

Ζ BAD ORIGINAL

Molded parts are also insufficient known or ΛθΐίίΡ Schmior iq! < liten by delay in cooling and bad κ Foriüheltuirj, low accuracy as a result of the streaking. These difficulties are both with the known single-layer plastic parts and you with the double-layer plastic parts produced in the vorbesuhriebencn manner.

The solution to the problem posed is the method according to the invention for producing closed and open containers and molded parts made of plastics in the melting process, characterized in that in one Operation by means of layered distribution of melted plastic after melting Plastic for a first layer (outer wall) a second (middle) plastic layer is formed with the addition of a propellant and is seamless and homogeneous with the first layer (outer wall) is fused, whereupon a third plastic layer (inner wall) is formed and seamlessly and homogeneously with the second (middle) layer is fused. Appropriately the middle layer is made stronger than the outer layer with the help of the propellant in the wall 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 the pipe socket

1098? 3Μ <Π8 ^ ₁ '

. _D ORIGINAL

Container is manufactured in the melting process, i.e. by means of a rotation process · Because the individual layers are formed in one operation and merge homogeneously and seamlessly with one another, this results in an excellent connection, the to excellent temperature and strength levels Properties leads. It is also possible to produce large-volume bodies that were previously seamlessly Could not be manufactured in one piece, tanks with a capacity of up to SO 000 1.

B.

By changing the additives in the plastic one Layer in relation to the other layers during 'the layer-by-layer distribution of the individual amounts of plastic, so z. B * by adding a propellant In addition to the plastic of the middle layer, there are also excellent insulation advantages » Different wall thicknesses and different material compositions lead within the scope of the invention diverse possibilities. Tests showed that parts manufactured in the! Heise according to the invention, which consist of several homogeneously and seamlessly fused layers, temperatures of - Withstand 40 ° C, furthermore no reaming or tension showed «Impact and drop tests could

do not destroy the inner wall. The same thing happened at a temperature of +70 C. The cold and

Ularm infestations were carried out for 24 hours at a time.

1098? 3/19 / * 8 - '

BATH ORIGINAL

rij.'irt- UorzugQiuexse mird in ά: η middle Seni-iht eina Ei-iJ..agy made of steel:., Po I / amid ohr Glasfibergauebe ainqescrim 3i inn »thereby tuurdran dia Sevta the cold · -, was;« · - and the search for varnishes still need to be done. It is important to note that the middle layer has a different surface than the outer or inner surface

Pressure tests with large-volume bodies, which according to dar f

Invention, produced 125 % better properties than the known single-layer containers or the two-layer containers described at the outset. The compressive strength tests were carried out up to 10 atmospheres.

tlif-h is that after finding the various Layers of their own temperature and moisture content own «, blown, spritzco, vacuum-drawn and Roto-layered drilling containers made in rotation casting and molded parts and also on di.3 described at the beginning Uieiaa manufactured double-layered parts held don i / orqananntan cold, heat, impact and örucki / ereur.hfln, similar to those of the invention Uotfahreri manufactured containers withstood,

Dia frFfind 1st anufendbnr ζ ir HerntoJ iuruj / on lttJi-n and Formt.oiJ »n nllo Tut now Ktifiat.it.orf"

109823/1938 _{BATHROOM 0RIGINA} J

or plastic connections. In a preferred embodiment, the outer landing is made of polyamide, the middle layer is made of polyethylene with propellant and the inner layer is made of polyethylene. Outwardly protruding screws, straps, retaining rings, hinges made of metal or polyamide are only grounded in the outer wall and in the middle layer. In this respect, connections plastic - metal - plastic or metal - plastic are possible. The embedding of metal parts, fittings, etc. in the middle layer has the advantage that these parts are then protected from all influences by the respective outer insulation, which is formed by the outer or inner lining.

Another important advantage of the invention is the saving of material. A wall of the same thickness made from a single-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, indt.m the inner and outer shell of solid, homogeneously melted liquid layer and the middle layer gives an iJL'houmarticjBS GobiIcJn, the wall according to the invention horgastollten wall have a greater capacity than; rm »: h thorn ningango botichriobonen nndoron Verfahrtm hergoflttil t your üiuoi rrln chi.iqor. fOatorial. Zug- und SoUnrvornucho nrgolion oinu

109821/1918,

BATH ORIGINAL

Improvement utr ubsr 100 % "

lUoitera details and advantages of the invention will become apparent from the following description of in Drawing schematically illustrated exemplary embodiments of containers produced by the method according to the invention. Show in the drawing

1 shows a first type of execution in longitudinal section » FIG. 2 shows a cross section along line II-II in FIG. 1, 3 shows a second embodiment in longitudinal section, Fig. 4 shows a cross section along line IV-IV in Fig. 3, 5 shows a third embodiment in longitudinal section, 6 shows a cross section along line VI-VI in FIG. 5, 7 shows a fourth embodiment in longitudinal section, 8 shows a cross section along line VIII-VIII in

Fig.? ',

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

and

11 shows a seventh embodiment in section.

In Figs. 1 and 2, the first embodiment is a to container closed on a molded nozzle 5 shown, the wall of three merged homogeneously and seamlessly in one operation Layers consists, namely of an outer wall 1

10 9823/1938 _E AO ORIGINAL

, a middle layer of polyethylene with propellant, which is thicker in the wall than the outer wall 1, and an inner wall 3 also made of polyethylene. The individual layers are in The drawing is not shown with separate hatching, since they are merged homogeneously and seamlessly.

In the case of the type of implementation according to FIGS. 3 and 4 is also a container which is closed except for a connection piece 5 and 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 in, 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.

In flg. 5 and 6 a closed container is shown, which also has the layers 1, 2, 3 formed in the manner according to the invention. In the middle layer 2 and in the outer wall 1, loops 6 are melted into the middle or polyamide, the inner wall 3 not being perforated. Screws, retaining rings, hinges made of metal or polyamide can be melted in the same way.

BATH ORIGINAL 109823/19 * 8

Hui of execution aurt nm-h Fii _; , 7 and B it hendelt - ^} uh üunFall omen tjast-h.! *: jsanon container, iliciiirJunQ dLB »rFificiumjsgunäOßn trhichton 1, 'λ _% Λ on ~ JiJ; .t continuously iu al ie dro. Layers iut nin hii.zeböfibändiges Glasstütjk 7 ej ngaschmulzsn ,,

Fig. 9 shows ainars goachlossornin container in which arFindungsgomäna mahrachichtigu wall a nozzle 8 melted down, and: was always continuous through .ilia three layers 1, 2, 3 “In a similar lüaisa can Verachlüsao, Rohrverbintl: jngen, lid, and outlet connections with or without fused metal or polyamide flanges and optionally with An opening that can be opened up to influence the Be provided inside the container.

With the type of execution according to Fi <) <. 1Ω are breakthroughs in the container belt, which go through all three layers on 1 _f 2 _r 3 qOiUin «

B «i flor execution requirements: according to Fit). 11 oind the entire structure or shape of the ribs with cleats, whereby the wall also consists of layers 1, 2, and W if the bijamas are now formed. In a similar lrun, grooves, l / nrtloFungön urul 'Stoijn antjeforn * uiardon ,,

r; n 0 "! GiNAL

1098?! / 1 938

~ 10 ~

In a manner not shown, in container or Formijtücken m the middle Sinit; ht 2 tmij Innanaundung 3 reinforcements aingeochmolzur »be, which also can protrude through the exterior wall 1 and interior wall 3. The grain sizes of the various materials PUr the inventive visual tone 1, 2, can be uniform or uneven.

The invention is not limited to manufacture the embodiments shown in the drawing. All types of embodiments are contemplated such as containers, furniture, boats »refrigerators, petrol tanks, oil tank, dashboards, electrical switchboards, lüellenreitbratte, buoys, radio and television housings, Stacking containers, pressure vessels, chairs and armchairs, suitcases, canisters, bins for larger garbage trucks, . complete caravans, car car parks, Värmeboiler, Rocket parts, aircraft fuselages, aircraft wings, components, building blocks, aircraft housings, machine stands, machine frames, engine housings, complete Insulation for heating and cooling devices, heat-insulating parts and vessels for the chemical industry, the are pressurized at the same time.

BATH ORIGINAL

109823/1938

Claims (1)

Claims 1. Method of making closed and open containers and molded parts made of plastics in the melting process, characterized in that by means of layering of molten plastic after the plastic has been snowed up for a first time Layer (outer landing) a second (middle) layer of plastic formed with the addition of a blowing agent and seamlessly and homogeneously with the first layer (Landing) is merged, followed by a third Plastic layer (inner lining) formed and seamless and is fused homogeneously with the second (middle) layer. 2. Vfirfahrun according to claim 1, through 10982 3/1938 indicates that the middle layer With the help of the propellant, the outer and / or inner walls are made stronger in the application 3. The method according to claim 1 or 2, characterized marked, the outer wall New poly a ld, the middle layer made of polyethylene with propellant and the inner wall made of polyethylene formed «earth. 4 · Method according to one of Claims 1 to 3, characterized by deO in the middle layer an inlay of new steel, pdyemid or Cleefeeergevebe melted down. S. procedural nech one of claims 1-4, characterized in e t, defl nech Externally protruding screws, straps, retaining rings, cardioids or polyamide only melted into the outer turn and into the middle layer will. 6 »Method according to one of claims 1 · S, d β -characterized, deBein hitzebeetlndlgee CleeetOek or nozzles, VerecilOeee, pipe connections ₉ covers, CIn- and Aueleuf connections eue! Retell or polyemid consistently in a rush of three 109823/1938 ' BATH ORIGINAL Layers (AuQanwandung, middle layer and inner wall) are melted down * 7 "Closed or melted Open container or molded part made of plastic according to the / experience precisely one of claims 1 - 6, d a -characterized in that it an outer wall (1) made of polyamide, one in one Operation homogeneously and seamlessly fused with it, middle layer (2) with thicker walls, consisting made of polyethylene with propellant »and has an inner junction (3) made of polyethylene that is homogeneously and seamlessly fused with it in one operation« da container or molded part according to claim 7, characterized characterized in that in the middle layer (2) an insert (4) made of steel, polyamide or Glass fiber fabric melted down let, j 9. Container or molded part according to claim 8, characterized characterized in that the middle layer (2) is sometimes parallel or non-parallel lying glass fibers is interspersed. BATH ORIGINAL 109823/1918 10 · Beheiter or format part according to one of claims 7-9, characterized by deO screws, Leeehen (6), retaining rings, So hinges either letell or polyamide only in the Outer application (1) and melted into the middle layer (2) and leaving the inner application (3) uninterrupted. 11. Container or format part according to the requirements 1 - 10, denoted by, deO a hltzebeetlndlgee GlaeetQck (7) or nozzle (β), VereehlOeee, pipe connections, Lid, inlet and outlet connections eue feteU or Polyeaid in three layers (outer end, middle layer and inner end) oingeeehaolzen. 109823/1938 Blank page