US2414781A - Dispensing package of material to be molded - Google Patents

Description

Patented Jan. 21, 1947 DISPENSING PACKAGE OF MATERIAL TO BE MOLDED George W. Wacker, Chicago, Ill., assignor to Clearing Machine Corporation, Chicago, Ill., a corporation of Illinois Original application March 5, 1941, Serial No. 381,841. Divided and this application October 10, 1941, Serial No. 414,498

(Cl. 20G-56) 2 Claims. 1

'I'hls application is a division of application, Serial No. 381,841,1led March 5, r1941, and` rclates more specifically to a collapsible container in which the material to be operated upon may be preheated and plasticized, and from which the material is forced by pressure applied to the container externally thereof, and is particularly adapted, though not necessarily limited in its use in molding processes.

A further object is to provide an improved container of this character which is strong, durable, and form-sustaining under ordinary conditions, but which may be readily collapsed or crushed.

A further object is to provide an improved container of this character which may be provided with ribs or corrugations to facilitate the collapsing or crushing thereof, when external pressure is exerted thereupon, and which ribs or corrugations, under normal conditions, will assist in maintaining the container against collapsing.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists of the features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawing, in which Figure 1 is a side elevation partly broken away of a container of this character constructed in accordance with the principles of this invention.

Figure 2 is a fragmentary view of the top of the container showing the weakened portion.

Figure 3 is 'a view partly in elevation, partly in section, showing a container constructed in accordance with the principles of the invention, disposed within a compression chamber, with the container under pressure for expelling the contents therefrom.

Figure 4 is a View similar to Figure 3, showing the parts in a different position.

Figure 5 is a detail view partly in elevation, partly in section, of one end of another form of container.

Figures 6 and 7 are views corresponding to Figures 3 and 4, with the'form of container shown in Figure 5 embodied therein.

The material to be operated upon is placed within the container, and the container is constructed of any suitable material, preferably of metal, and may be of any desired configuration in cross-section, but is preferably of a congura- 2 tion to conform to the contour of the interior of a compression chamber I0.

The container itself preferably icomprises a body II, one end. of which is closed as at I2, and the other end is closed as at I3. This end I3 is preferably dish or cup-shaped to any desired extent, and is preferably provided with scored or weakened portions I4. The normal position of the end I3 is as shown in Figure 1; that is, lpreferably slightly convexed, so that there will normally be provided an air space I5 between the material I6 and the end I3.

If desired, the container may be provided with circumferential creases I'I, or the body may be formed of any undulating configuration which will 'facilitate collapsing the container in the direction of its longitudinal dimension.

In use, with the process described in my aforesaid application, the container is lled with material in an unplasticized condition, and is subjected to the action of heat in any desired or suitable manner, so as to plasticize the material within the container, and the container is only partially lled, as shown in Figure 1. The heated container with plastic -material therein is then placed into the chamber I0, to rest upon the retracted plunger 2|, and the container is preferably of a 'dimension to fill such chamber in a direction crosswise thereof at the top and bottom of the container.

The'weakened portion I4 of the container will be disposed in alinement with the sprue I8 in a mold section I9, and when the mold section I9 is placed in position so that the portion 20 thereof enters the opening in the chamber I0, the con- Vexed portion I3 of the container will be spaced from the bottom of the projection 20 of the mold section, When the plunger 2| is then forced upwardly, or advanced, the container will be advanced or moved upwardly until the edge of the container contacts the periphery of the extension 20. l

The continued upward movement of the plunger will commence to collapse the container until the contents of the container are compressed. The container will then be expanded until the body f thereof contacts the Wall of the chamber I0. A

further upward movement of the plunger causes the head of the container to be deformed and to further contact the surface 20. This will cause the flexible portion of the head of the container I3 to spring into a concaved configuration, as shown in Figs. 3 and 6; that is, the flexible portion of the end I3 is temporarily'forced into the container. When such pressure is relieved. the

3 end I3 will spring back into its normal convexed sha e.

Apcontinued pressure of the plunger 2l in the same direction will then tend to collapse the container from the opposite end, thereby forcing the material I6 against the end I3 of the container, with the result that the weakened portion I4 Will become ruptured, and the ruptured portion will extend into the sprue I8 tc form a nozzle 22, as well as a seal for preventing the escape of the material from the container between the end of the container and the bottom 2D of the portion 23 of the mold section.

If the mold chamber is not sufficient to receive all of the material from the container I I, that is,

if the container contains suiiicient material to mold or form a plurality of articles, the plunger 2I after the first shot will, upon the next or further advancing movement, eject additional material into the mold chamber after the rst article has been removed therefrom.

After all of the material has been ejected from the container, the mold section I9 may be raised to open the chamber Ill to permit free access to the chamber, so that the collapsed container may be removed anda new one placed therein.

After a charge of material has been injected into a mold, and the container still holds a quantity of material sufiicient for one or more injections, bleeding, or the undesirable seeping of material into the sprue passage of the mold, due to residual pressure, is prevented by the automatic increase in the volumetric capacity of the container brought about by the action of the end I3, which, due to its resiliency, will spring back from the position shown in Fig. 3, upon retraction of the plunger and the consequent movement of the chamber I away from the mold, as shown in Fig. 4. This movement of the resilient end I3 will provide space for the compressed material to expand without making its Way into the sprue passage.

In the form of the invention shown in Figures 5, 6, and 7, the container 24 is constructed of similar material, and the end 25 has the same characteristics as the end I3. However, in this form of the invention there is provided a tubular extension 26 on the end 25, which extension is closed at its end, and the closed end is weakened with respect to the `body portion in a manner similar to that shown in Figures 1 and 2, or in any other manner.

In this form of the invention, the sprue 21 in the lower mold section I9 is provided with an enlarged portion or chamber 28, into which the tubular member 26 projects.

When the plunger is forced forwardly, the material Will rst spring the end 25 into the position shown in Figure 6, and continued pressure upon the material will cause the end of the tubular member 26 to rupture to form the nozzle 28,

which projects into the sprue 21.

Also, in this form of the invention the pressure of the material within the tubular member 26 will, by reason of corrugations or grooves 30, ex,- pand and frictlonally grip the wall of the chamber 28.

In both forms of the container it will be manlfest that the pressure of material caused by the action oi the plunger 2| in collapsing the container will be exerted against the end 20 of the portion 23 of the mold section.

In the form of the invention similar to the form shown in Figures 1, 3, and 4, the container is collapsed in an endwise direction, and when the mold section I9 is removed, the chamber I0 will be uncovered and free access may be had thereinto.

While the present invention has lbeen described in connection with a press for molding articles, it is to be understood that the invention is not to be limited-t0 that use alone, as it is Well adapted for use in packaging and dispensing many other articles, as well las c-alking, lubricants, etc.

It is also to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is:

1. An original package `for material to be molded, comprising a container formed of collapsible material and entirely closed at both ends, a portion of one of said ends being weakened, whereby said portion is adapted to be ruptured by forcing the material which is in the container thereagainst, by external pressure applied to the opposite end of the container, the first said end of the container being provided with a closed laterally expansible tubular extension, said extension adapted to be laterally expanded by press ure of the material passing thereinto.

2. An original package for material to be molded, comprising a container formed of collapsible material and entirely closed at both ends, a portion of one of said ends being weakened, wherebyl said portion is adapted to be ruptured by forcing the material which is in the container thereagainst, by external pressure applied to the opposite end of the container, the rst said end of the container being provided with a closed tubular laterally expansible extension, said extension adapted to be thus expanded by pressure of the material passing thereinto, the said rupturable portion being disposed in the closed end of said extension.

GEORGE W. WACKER.

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