US1035984A - Can forming and trimming machine. - Google Patents

Description

1). MALDE. GAR FORMING AND TBIMMING MACHINE 1,035,984. I APPLICATION FILED FEB. 25, 1911. 20' E i g. l

I 75 .AI' i W Inventor:

Attorneys ILM I 11a D. MALDE.

CAN FORMING AND TRIMMING MACHINE.

APPLIGATIOII FILED 1511.25, 1911.

1,035,984. Patented Aug. 20, 1912.

2 SHEETSSHBET 2.

fi? x \T 10 Q7 Witnesses: Invan cur: I]- Malia Attorneys unnnn erm ne PATENT orat on. i

nnnrnn means, or sravanennynonwnt. can some AND We mcnnm Specification of Letters Patent.

Application filed rem-na es, 1911. Serial No. emcee. r

, anning. 1912.

To all whom it may concern:

Be it known that I, DANIEL. MALDE, workmaster, citizen of Norway, residing at Stavanger, Norway, have invented new and useful Improvements in Can Forming and Trimming Machines, of which the following is a specification.

My invention relates to improvements 1n combined can forming and trimming machines and has for its object to provide a machine which will be adapted to operate efiiciently at high speed.

My invention consists in the combination of parts hereinafter described and claimed.

The invention is illustrated in the accompanying drawings in which- Figure 1 is a vertical section showing the position of the parts before the commencement of the pressing operation. Fig. 2 is a similar section showing-the position of the parts when the operation has been completed.

The lower or bed part ofthe machine consists of the stationary form 1, which serves as a matrix for the body of the can, and

around this form arearranged two annuli,

2 and 3, the annulus 2 having a cutting edge l-and serving as the trimmin die. Studs 4, 5, extend between said annuh and a crosspiece 6 bearing against a heavy spring 7. An annular seat 8 is interposed between the trimming die 2 and the studs 4:, and the position of said die can be adjusted by inserting suitable plates between it and the seat 8.

9 is the usual stationary cutting die which coiiperates with the outer die 10 of the presser head or upper part of the machine. The die -10 is screwed to the block 12 which serves to guide the rod 13 of the knock-out piston 11 mclosed in said annular die 10.

The studs 4, 5 are of such length that when the parts are in the position illustrated in Fig. 1 the cutting edge 14 of the annular trimming die at lies flush with the upper face of the annulus 3. A space 15 is left between the annulus 3 and the trimming die 2, this space being such that the annulus 3 can only move downwardly relative to the trimming die 2 through a distance equal to the thickness ofthe sheet metal of the can, as seen in Fig. 2. In other words the downward movement of the annular member 3 is limited by the die 2, and the extent of this movement can be accurately adjusted by .means ofthe adjusting plates hereinbefore referred to.

When the piece of sheet metal 16 fi-om which the can is to betpressed is placed upon the lower 'art of e machine, and the resser hea' 1s depressed, the material for the can is out out in the usual manner by the dies 9 and 10. In the further downward movement of the presser head, the outer annular edge of the sheet is held between the die 10 and the annulus 3, and the-material is pressed over the form 1, which shapes the 'body of the can. The bottom of the can is formed by the piston 11 in the usual way, and as the operation continues the annulus 3 and the trimming die 2 gradually recede together until the annular seat 8 abuts against the machine frame, as shown in Fig. 2. As the trimming die cannot recede farther, continued downward movement of the presser head causes the edge 14 of the trimming die 2- to enter the outer flange of the can until the pla between the die 2'and the annulus 3 ,is ta on up in the downward movement of said annulus. This takes place at the moment the cutting edge of the trimming die has passed through the thickness of the metal in the flange aforementioned. Owing to the abutment of the annulus 3 against the die 2, no further downward movement of the presser head can take place, so that the cutting edge 14 cannot possibly enter the lower face of the annular die 10 and damage it. The bur which is left on the edge of the rim 17 of the can, after the annular strip 18 has been severed therefrom in the manner described above, is directed downwardly relative to the finished box and this facilitates the operation of connecting the body of the can with its cover, as will be readily understood.

It is obvious that the annular cutting die could be rigidly connected to, or be even made integral with the form 1, the said parts in such case being permanently in the position shown in Fig. 2.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

1. A can forming and trimming machine comprising a presser head, a bed portion, a trimming die on said bed portion presenting an annular cutting edge, a portion of the presser head presenting a plane annular surface and adapted to force the edge of a blank against said annular edge,

whereby to trim the can edge, and means to limit the movement of the presser head tothe remer head presenting aplane annular sur ace and adapted to force the edge of a blank against said annular cutting edge, whereby to trim the can edge, and an annular member associated with-said trimming die to limit the movement of said prcsser .head toward the bed portion to prevent it from being damaged by the annular cutting edge of the trimming die. v

3. A can forming and trimming machine comprising a bed POI-5011,11 presser head, a form.on said bed portion, trimming means consisting of a tapered annular cutting die encircling said form, and a correspondingly tapered annulus encircling said annular cutting die and spaced therefrom by a distance permitting of the depression of said annulus by the presser head for a distance equal to the thickness of the sheet of material under treatment.

4. A can forming and trimming machine comprising abed portion, a presser head, a knock-out member in said Presser head, an

formingand. machine annular die carried by said presser head and encircling said lmock-out-member; a form on said bod portion, trimming means consisting of a tapered annular cutting die encircling mid form, a. correspondingly tapercd annulus encircling said annular cutting die and spaced therefrom by a distance rmitting of the depression of said annulus y theprewer head-for a distance equal to the thickness of the sheet of material under treatment. 1

5. A can forming and trimming machine comprising. a bed portion, a presser head, a form on said bed portion, trimming means consisting of a tapered annular cuttmg die encircling said form, a correspondingly tapered annulus encircling said annular cutting die'and spaced therefrom by a distance permitting of the depression of said annulus by the presser head for a distance equal to the thicknws of the sheet of material under treatment, and an annulus seating supporting the trimming die, guiding and liftmg means for said seating, anda. cross-piece opcratively connected wlth said annulus.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

. DANIEL MALDE.

Witnesses: K. Ronnnnsmn, Fun-n Nnssnnn.

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