US530857A - Chester - Google Patents

Description

(No Model.)

J. SHEPHERD. MACHINE FOR MAKING MOLDS AND GORBS T0 lBE USED IN CASTING METAL PIPS, &c.

Patented D D D.. i D.

NITED TATES `Jon SHEPHERD, or LowER nannsunti` vNEAR s'rocKPoR'nvv AssIeNoR -To HIMSELRAND THOMAS BOWES LEIGH,

CHESTER, ENGLAND.

0F HEAToNMERsEY, NEAR MAN:

MACHINE 'ron 'MAKme Moms'AND 'contato Bt u sto iN ,CASTING METAL PlPts, cc.

v 'SPECIFICATION forming part Aof Letters Patent No, 530,857, dated December 11, 1894. y

' Application tied Mara 1,1894. stanno. 501,975. (remodel.) Patented in England December 12. 1892, No. 22,785; n1

` Germany January 6, 1894, No. 77,640, and'in Belgium May 18,1894, No. 110,026`

To all whom 'it may concern,.- Beit known that I, JOB SHEPHERD, a sub- Ject of the Queen o Great Britain andLIreland, residing at Lower Bredbury, near Stoek-v port,`in the county of Chester, England, have v invented Improvements inlvlachinesfor Making Molds and Cores to beUsed in Casting` Metal Pipes and Other Articles, (for which patents vhave been granted in foreigncountries as'follows: Great Britain, dated .Decem-` ber 12,1892, N o. 22,7 85.; Germany, dated Jann ary6, 1894, No. 77,640, and B elgium,'dated May 18, 1894, No. 1l0,026,) of which the'following is a specification.

This invention hasreference to an improved machine for making molds and cores to be used in casting metal pipes and other articles, and it has for its objectv to enable molds and cores of good quality to be produced in a rapid and economical manner.

The machine comprises a rammen to which a reciprocating motion is imparted by the pistonand rod of a Huid pressure motor, a hopper for containing the material of which the mold or core is to be' made, anda valve that 'is arranged to control the passage of material from the hopper to a mold or core box below and is operated by or from the plunger the-arrangementbeing such that molding material will be admitted to the mold or core box each time the rammer rises and such material will be pressed to the required form by the rammer when the same descends.

In some cases several rammers may be' used with one motor common to them.

In the accompanyingdrawings, Figure 1 shows, partly in elevation and partly in vertical section, a mold makingmachine according to this invention. Fig.' 2 is a diagrammatic View to a smaller scale illustrating a modification. i

Referring to Fig. 1, A is an annular hopper provided with dividing ribs A and with an annular opening B controlled by a tubular valve C. This valve is provided with a lip or projection C by which itis raised, and consequently opened, by the angeD when the rod E to which it is connected moves upward. Into the said hopper there is fed the material,

inderF to-Which'actuating Huid, such as steam '5 5 or air is admitted as required togoperate the piston and rodpE. To the rodE is secured an annular r'ammer Gat the upper end of which the flange D may be'arranged as shown.,-

g H is a mold box with wide mouth H and Ko is a pattern, these being supported on the base p L carried by the trolley M mounted to run on -'ra ils at the bottom of va pit or underground chamber A* at the top of which the hopperA is supported. As the-ramoner G rises, -the- 6.5 'Y

flange D comes in contact with the lip or pro-f jection C of the valve C and raises thatvalve so as to'open 4the outlet B, through which earth, loam, or sand falls into the annular space Naround the pattern 'K inthe box H. 7o As the rammer G descends the'valve C will close and the remmer will compress thema;

terial thathas fallen into the annular space.

-..N. On the completion of the mold the pattern K` is withdrawn; v

If desired means may be provided to prevent rotation of the rammer.

` When making'cores, there will besnbstitu'ted for pattern Ka box or core barrel of suitable p form, and for the box H there will loesub'sti-` 8o tuted a suitable corebox which may be made in parts so as to openas well understood; an appropriate form of rammer being also used when necessary in lieu of that shown.,v The rammer might be worked by hydraulicpower but that would be less advantageous because the remmer-could not be so quickly actuated. By this invention the productionof molds and cores is facilitated, their cost is reduced,

and lbetter molds or cores' may be obtained 9o When making molds or cores for smallpipes, the machine may be 'constructed with several rammers such as GrA eachA working through a separate hopper and valve, and all carried by the same piston rod, means being provided to prevent' the piston'rod rotating about its center. Fig` 2 shows the upper part Y of an arrangement of` this kind Vsuitablefor making three molds or, cores simultaneously.

Inthis case the three rammers are carried by Vro yzo

rods E connectedto a common support E2' fixed to the lower forked end of the piston rod E, the three hoppers A serving to prevent rotation of piston rodand rammers. What I claimv is 1. A'mold or core making machine comprising a hollow rammer, means for vertically re ciprocating said ram mer, ,a hollow stationary feeding hopper provided at its lower end with ,anoutlet, a tubular valve arranged' to slide vertically within said hopper and to control said outlet, and means operated by said rammer for automatically raising said valve during the ascent of said rammel', substantially as herein described for the purpose specified.

2.' A moldor core making machine, comprising a xed vertically acting reciprocating motor, a verticallyy reciprocating rammer ar- -ranged below and directly and rigidly con- *nected -to the reciprocatingipart of said motor and having its lower end corresponding in cross sectional form to that of the mold or core tobe produceda hollow stationary feed- `ing hopper provided with a lateral outlet, a

tubular valve arrauged to slide vertically within said hopper and control said outlet, and means operated by said rammer for automatically raising said valve during the ascent of the rammer, substantially as herein described for the purpose sr. ecilied.

v 3. A mold or core making machine comprising a fixed vertical liuid pressure reciprocating motor, a rammer'rigidly connected to and actuated directly bythe piston of said motor,

a 4mold or core box having a central patternv or core barrel arranged below said4 motor, a stationary feeding hopper xed independently of and above said mold or core box and provided with a feed outlet anda tubular and normally stationary valve arranged to slide vertically in said hopper to control said feed outlet, and to be automatically raised and opened by said rainmer at each upstroke thereof, substantially as herein' described for `the purpose specified.

4. A mold or core making machine, comprising a uid pressure reciprocating motor,. a vertically movable rammer connected to the piston of said motor, a hopper having at its lower end an outlet surrounding said rammer, a vtubular valve arranged within said hopper so as to `control the outlet therefrom and provided with a lip or projection and a V'projecting' part carried by said rammer and arranged to-act against said lipor projection on each upward movement of said rammel' substantially as herein describedfor ,thepur-i pose specified.

5. A mold or core making machine, compris# ving a plurality of vertically reciprocating rammers each corresponding in cross sectional 4form-to that of the mold or core to be made,

a plurality of stationary feeding lloppers each j provided with an outlet 'and arranged -to surround' one of said rammers above rthe correspondingmold or core box, a plurality of tubular valves each normally stationary and adapted to controlthe outlet of one of said hoppers and arranged to be automatically raised and opened by the corresponding-ram-- vmer when the same moves upward, across head common to said rammers and to which4 they are fixed, and a fixed vertical reciproi eating motor having its reciprocating part rigidly connected to said cross head, all substantially as herein described for the purpose speciiied.

6. The combination with a vertical mold or core box having therein a fixed pattern or core barrel, of a vertically reciprocating annular rammer carrying aprojecting part a fixed vertically reciprocating motor arranged above and having its reciprocating part rigidly connected to said rammer, a stationary feeding hopper fixed above and independently of said bo'x and having a-lateral 4feed outlet, and a tubular valve arranged to slide vertically within said hopper'and control its feed outlet, and provided vwith a lip or.,pr'o

jection arranged in the path of the projecting portion carried by said rammer substantially as herein described.

7. A mold or core making machine, comprising the hopper A formed with lower outlet B and arranged at the top of a molding pit y or chamber Ai, the tubular valve C with lip or projection C', the vertical rammer G withv fiangerD, the fluid pressure` motor F having Aits piston rod E extending through said hopper and connected to said rammer, and the mold or core box H supported below said hop- IIO

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