US1570617A - Method of refrigerator manufacture - Google Patents

Description

Jan. 26 1926.

L. G. coPEMAN HBTHOD oF REFRIGERATOR mumc'ung Filed Aprile, 1925 Y 3 sneets$hetz` NVEYTOR.

ATTORNEY.

Jan. 26 1926.

l.. G. COF'EMAN` METHOD or RE'FRIGERATOR MAnUFAcTUnz Filed Apri; 6,' 1925 l INVENTOR. fg/d? 59m/rafa A Patented Jan. 26,1926. l

UNI-TED STATES 1,510,017 ina'rsiai"v .oF-FICE.

LLOYD G. COPEMAN,OF FLINT, MICHIGAN.v

'METHOD or REFRIGRATOR MANUFACTURE.

Application sie@ .April e, 1925'. seriai- No. 21,002.

To all wliim z'zf may concern.; Be it known that I, LLOYD G. CorniirAN, .a citizen of the United States, residing lat Flint, in the county of- Genesee and State o f- Michigan, have invented certain new and useful Improvements in Methods-ofRefrig- I' erator Manufacture, of which the following be, manufactured by is a specification. Y

vThis invention relates to a` method of re` 'frigerator manufacture and has for its object. "means for mouldinga complete composite refrigerator shell with one set of mould sec# Obviously other articles-as well could the same method. In constructing any refrigerator with a tions.

vcompositeshell, whether the shell is coml -iposedv of two kinds of inouldable material I finishing coat, -it'is necessary to use two' com' plete sets of moulds' as the refrigerator core or a material moulded over a wood core, it

necessitates considerable work. In. ,coating a refrigerator core with artificial stone or ya must kbe first moulded and then placed into another set.of moulds so,that the layer of artificial stone'` which covers-the core may bev moulded. or cast thereon.

In the drawings: I

Fig. 1 isa'v-iew showing themould in sectionJ and the means for` separating the mould section so that -the .same may be sprayed with a relatively thin outer layer of stone or other finishing material.

Fig. 2 is a'vertical sectional, view showving the mould sections drawn togethery in readiness for pouring the 4refrigerator core.

' Fig. 3 is a similar view-showing the refrigerator core poured. into the moulds.

Fig. 41s a perspective view of the completed refrigerator with parts -broken away to show the compositecliaracter of the shell.

a designates the sidewalls of the .outer mould, which are secured to the bottom mould section b, provided with the openings 0in which the-inner .mould sections or cores d are fitted when the same are drawnfor fitted' together. These inner mould sections or cores are supported on the plunger e which works in the cylinder f; compressed air or hydraulic pressure may be exerted on the end ofthe plunger for raising the same to any heightv desired, it being necessary that these-"cores be raised to sucha height that the operator can spray the insidelof the outer mould section with a spray gun g. It wouldbeimpossible to spray the matrices of the mould sections were it not forv the fact that the same can be sprayed and then drawn together and correctly positioned with respect topeach other, without necessitating an-adjustment every time the mould sections are separated. 1 l".

The first step in the method 'is the coating .of the matrices ofthe mould sections with an Oxy-.chloride cement composition. coatingforms an outer layer la, of cement which when hardened forms a very goodv Thisartificial stone. This composition is pref' i Verablycomposed of zumixture of magnesium oxide 25%, (silica),- 50% and sand25%, all percentages calculated by'. weight. To this. dry mix 4'is added sufficient magnesium chloride in solution "of 26 B. gravity, to

spraygun. I'preferably spray this material-.on the mouldsections as it is `the mostl convenient and practical Way in which to coat the same, but 4obviously this 'material' could becoated on the matrices of the mould sections in other Ways ifdesirable. Obvi ously a finishing coating 'containing other materials could be used depending on theL article Aand the use to which it is The'neXt step'inthe operation isp the dropping of the inner mou'ld sections or cores into position within: the outermould. Such a position is shown in Fig. 2 which shows the inner cores spaced vfrom the walls of ,make the niiXt-uresuitable for spraying in a the outer mould section, the surface of the mould sections carrying this relatively thin layer ofv artificial stone or finishing coat which may or may not have completely hardeiied. This layer could be hardened completely before the mould sections are fitted together, or it is probable that after the artificial stone composition is sprayed on the moulds the'same will be immediately fitted together. The next ^step is the pouring of a plastic 'filler in the space' between the moulds, which will completely fill the space,

as shown. in Fig. 3,. between the layers of.

`before the outer Oxy-chloride cement has hardened,.. and both the plastic filler and the outer finishing coat allowed to harden at the same time, or the finishing coat may be first allowed to set and harden before pouring the refrigerator core or filler.

In spraying the outer layer on the outer mould section, the inside surface of the layer is preferably left rather rough. In other words, it has an irregular contour, so that when the inner core is poured in it fills all the valleys in the 'irregular surface of the outer finishing layer, thereby serving to key the inner core and outer layer4 together.

What I claim is:

1. A method of-making a refrigerator or other article of manufacture, which lcomprises the coating of the moulding surfaces of the outer and inner mould sections with a relatively thin layer of finishing material,

H andthe pouring of a plastic filler in said mould to form a composite'shell structure.

2. A-method of making a refrigerator orr other. article of manufacture, which comprises the coating of the moulding surfaces of an outerandmner mould section with al relatively thin layerof Oxy-chloride cement,

l 'and the pouring of a plastic filler of heatinsulating material in said mould between the layers of Oxy-chloride' cement to form a composite heat-insulatin ,refrigerator shell.

3. The method of maing a refrigerator orl other articlev of manufacture, which comprises the spraying of the moulding surfaces of outer and inner mould sections with a relatively thin layer of finishing material, and the pouring of a plasti'c'filler of Aheat'-'insu lating material in said mould between the 4. .A method of making a refrigerator or other article of manufacture, which comprises the coating of themouldingvsurfaces of an inner and outer mould section with a relatively thin coating of finishing material while said mould sections are separated, the

moving of one mould section with respect to the other to bring the same together oney within the other, and the pouring of a` p1as' tic filler in said mould between the finishing coatings on the matrices -of the mould sec, tions to form ai composite shell structure.

5. A method of makingl ak refrigerator or other article of manufacture, which comprises the coating of the moulding surfaces of an innerv and outer mould section with a relatively thin coating of finishing material the surface of whichhas an irregular contour, and the pouring of a plastic filler in said mould to forma composite shell structure, the plastic filler filling the crevices in the irregular surface of the 'outer yfinishing coating and serving to keythe filler andl outer finishing coating together.

6. A method of making a refrigerator or other article of manufacture, which c0mprises the coating of the' moulding surfaces of an inner and outer mould section with a relatively thin layer of artificial stone the coating of a plurality of inner mould sections or cores with a relatively thin layer of artificial stone, the telescoping of said inner cores within the outer mould and littin the same together, and the moulding of a p astic filler of heat-insulating material in said mould and between the layers of stone j

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