US1328799A - Paddle or plunger for molten glass - Google Patents

Description

K. E. PEILER.

PADDLE 0R PLUNGER FOR MOLTEN GLASS.

APPLICATION FILED MAR. 27 Hill- 1,328,799, Patented Jan. 20, 1920.

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. PADDLE on. rmmona Fon'noLrnN GLASS.

Specification of Letters Patent.

Application filed March 27,1917. 1 Serlal- No. 157,654;

. citizen of the United States, residing at Hartford, in the count of Hartford and State of. Connecticut, I ave invented new and useful Improvements in Paddles or Plungers for Molten Glass," of which the 1 following is a specification.

This invention relates to theconstruction of a stirrer or paddle or plunger for working in molten glass. It is herein shown and described as designed for use in amachine for feeding or gathering charges of molten glass of uniform size suitable for subsequent pressing, blowing or otherwise sha ing to commercial form. Such paddles or p ungers are required to operate in or to' dip 1nto molten glass, and consequently they are-subjected, particularly the head ends, to very high heat.

The object of this invention'is to construct a paddle or plunger for-'amachine of this character in such manner that it is inexpensive to make and durable in use, in that it will not readily bend or break or burn" out, or become otherwise impaired as a re sult of the action of the high heat to which it is subjected when operating in or dipped into the molte glass,

This object is attamedby a construction in which an operating head of heat resistmg refractory material, such as pot .clay,

adapted for workin in molten glass, in-

' cased in a metallic reinforcementwhich may serve also as a support by means of which the operating head is attached to a holder or carrier of-the machine or apparatus by which the head is operated, and this metallic would otherwise break too easily when 4 moved through the hot viscous glass. On

reinforcement, or carrier, is provided with passages through which air or other cooling medium may be circulated. Being thus kept below the temperature at which it wou d bend easily, the metal forms a supporting and reinforcing backbone for'its surround-' ing shell 1 of refractory material, which being usually of weak and brittle character,

the other hand, the refractory material shields the metallic support from direct con-- tact with the intensely hot glass, so that-the parts mutually protect each other. I

Figure 1 of the accompanying drawings shows a side elevation of a paddle which fOr' securing the head to the-support. Fig.

. 2 is a plan view in-cross-section,' taken at the line 2 -'.2 on Fig. 1, illustrating the manner of centralizing the pipe provided for introducing cooling air into the support.

Fig. '3 shows a 'tran'sverse section on the plane indicated by the line 33-3 on 'Fig. 1, Fig. 4shows'a transverse section acrosspart of the head on'the plane indicated" by ,the

. 1' line 44 on Fig. 1. Fig.5 showsa trans-. I

verse section across'the head on the plane indicated by the line 5--5 on Fi 1.

The paddle illustrated in the rawings is only one of many formsin'which'this invention may be applied. Through the head .1 and its hub 2 is a central longitudinal core, the lower part; 3 of which is' larger in diameter than the upperpart 4 so as to providea shoulder 5.- Tl'1e' lower part of the core in the head is preferably flattened on one side, as alt 6, or otherwisemade irregular in shape, to prevent the refractory parts from turning on the metallic support, and in this core at its upper end is placed an interiorly threaded metal cap 7 which is also flattened onits outer side as shown in Fig.

movement be cemented in place, preferably'by fire cla- 'In order to 'more securely hold this plilg. in place, it may be provided-with an annular groove 9, and a coinciding'annular groove 10 may be made around the interiorof the core-for receiving fire' clay or other cementing material when the parts are assembled.

' The shankof the paddle above the heady "is preferably built up of separate sleeves or collars 1-1 of refractory material, like that of the head 1.-' These collars have their central openings of the same diameter, as

the small part 4 of the core through the head. The collars are usually cemented together and to the metal support 12 by fire clay lor othersuitable heat resisting ma-.' teria 55 embodies the invention, with a portion of The support 12 for this paddle is a metal ture of the supporting tube 12 below the tube, the lower'end of which, is threaded which may be utilized for supporting the tube on the holder or carrier 1 of the machine, in which this implement is to be used. For the purpose of keeping the tempera;

point at which it would easily bend, a pipe of smaller exterior diameter than the mterior diameter of the supportmg tube 12 extends through that tube, its lower end besufficiently to ing centered with the nut 7 by means of a washer 17. The sides of the lower end of the pipe 15 are cut awa as at 18, thus opening 1t into the tube.

y with the tube 12 by screws 16, and it is designed to be connected with an suitable source of cooling air or other fluld under pressure, so that the cooling fluid will flow down through the pipe 15 to the head of the paddle, and return around the pipe 15, in such manner as to cool the pipe and the supporting tube 12 prevent them from being overheated.

' With this construction the metal parts are protected from heat, and all expansion and contraction due to the heating of the paddle when it is operating on the hot molten glass and its cooling when removed therefrom can take place without'subjecting any of the parts to undue strains such as would cause them to break or deteriorate.

The operating head ma be of any form desired, for its intende stirrer, or paddle, or plunger, or for its mode of operation. The protecting collars 11 on the shank herein shown as being cylindrical may be of any cross section, or form, or length desired.

The metallic reinforcement, or support, is herein shown as being built up of standard commercial forms of iping, which are inexpensive, and easily 0 tainable almost anywhere. The reinforcement may, however, be made of cast metal, in one or more pieces, with passages drilled or cored therein for the circulation of the cooling fluid. Moreover, the reinforcing member may be of any desired cross section. When cylindrical members are employed some portions should be flattened as shown at 6, or otherwise made' irregularin form to prevent the head and its reinforcing member from turning relative to each other.

' The refractory material of the head which is herein shown as being built up of separate sections, may for some purposes be made in fewer pieces, or in a single piece, for purposes in which the expansion and contraction, to which it is liable, would not be sufficient to disrupt or seriously break he upper end of this pipe 15may beheld central t g y 11 .ingmem er is pus ed through the head 2,

functions as a the head. Whenever such cracks occur they are liable to extend throughout the entire structure. It is for the purpose of avoiding these cracks, or at least to confine them locally, that the structure is preferably built up of separate sections, united by 'fire clay or other suitable heat resisting cement,

which is more elastic or yielding than the more refractory material of which the exposed portions of the head are made. These joints permit of local expansion and contraction, and any cracking which may ocour will usually be limited to the oints, or

at least is not liable to extend across the joints from one section of the head to another. 1

In assembling these parts, the reinforcing member, if made of separate pieces as shown, is first put together, the nut being screwed on t e pi e 12. Then the reinforc from its lower end to the positionshown in Fig. 1 and enough of the collars 11 are added to make up the desired length of shank, the cement beln applied between the joints. Cement is t en inserted into the core 3 around the'collar 7, thus in effect grouting it in place, after which the plug 8 is inserted and some more of the cement, or grouting if put into the joint, filling up the annular grooves 9 and 10, 'thus effectively holding the plug in position when the cement is set.

The supply pipe 15 may then be inserted to place and secured by screws 16.

When-put into use, this implement may be held by any suitable form of chuck or holder 14.. Connection may be made between.'

the pipe 15 and any convenient supply of air or other cooling fluid under pressure, by means of an ordinary union coupling, as shown in Fig. 1. The connection from the union to the air tank or other source of supply may be made by a jointed or flexible pipe, in accordance with the common practice in glass working machines.

The invention claimed is 1. An implement for working molten glass, including a head of refractory material having a shouldered opening through it and having a flat surface at one side of the opening, a tubular reinforcement extending into one end of the opening, a tube fastened within the reinforcement for conveying cooling fluid, an enlarged cap threaded to the reinforcement and flatted on one side to engage the flatted surface of'the head and bearing against the shoulder of the opening,

and a refractory plug closing the other end ing fluid fastened Within the reinforcement, and a refractory plug closing one end of the opening.

3. An implement-for working molten glass having a tubular reinforcement, a refractory head with an opening through it mounted on the reinforcement and secured against rotation on the same, a refractory protecting shank mounted on the reinforcement above the head, a tube for conveying cooling fluid fastened Within the reinforcement, and a refractory plug closing one end of the opening.

4. An implement for working molten glass having a tubular reinforcement, a refractory head with an annularly grooved opening through it mounted on the reinforcement, means for circulating cooling means through the reinforcement, and a refractory plug closing one end of the opening and having an annular groove to match that in the opening.

Signed at Hartford, Connecticut, this 26th day of March, 1917.

KARL E. PEILER.

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