US1717507A

US1717507A - Machine for manufacturing tubular bodies from plastic substances

Info

Publication number: US1717507A
Application number: US114550A
Authority: US
Inventors: Hanns Arthur
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-07-03
Filing date: 1926-06-08
Publication date: 1929-06-18
Anticipated expiration: 1946-06-18

Description

June 18, 1929. A. HANNS 1,717,507

MACHINE FOR MANUFACTURING TUBULAR BODIES FROM PLASTIC SUBSTANCES Filed June 8, 1926 2 Sheets-Sheri. l

June 18, 1929. AHANN 1,717,507

MACHINE FOR MANUFACTURING TUBULAR BODIES FROM PLASTIC SUBSTANCES Filed June 8, 1926 2 Sheets-Sheet 2 INVENTOR for inserting in these bodies wooden or other Patented June 18, 1929.

UNITED STATES 1,717,507 PATENT OFFICE.

ARTHUR HANNS, OF LEIPZIG-PLAGWITZ, GERMANY.

MACHINE FOR MANUFACTURING TUBULAR BODIES FROM PLASTIC SUBSTANCES.

Application filed June 8, 1926, Serial No. 114,550, and in Germany July 3,1925.

My invention relates to machines for manufacturing tubular bodies such as toy whistles and the like from plastic substances such as sugar or chocolate, means being provided handles. It is an object of my invention to provide improved means for preparing such bodies for the reception of such handles or the like. To this end I provide one or several moulds and retractable cores adapted to cooperate with such moulds so as to form cavities in the hollow bodies.

In the drawings'aflixed to this specification and forming part thereof a machine embodying my invention is illustrated diagrammatically by way of example.

In the drawings,

Fig. 1 is a side elevation of the machine, and

Fig 2 is an end elevation,

Fig. 3 is a section on the line 33 in Fig. 1,

Fig. 4 is a plan view, and i Fig. 5 is an elevation of a core extractor.

Fig. 6 is a section on the line 6-6 in Fig. 3. Figs. 4 to 6 are drawn to a larger scale.

Fig.7 is an end elevation, partly in section on the line 7-7 of Fig. 8, and

Fig. 8 is an axial section of a modified mould cylinder.

Fig. 9 is a view in-section taken on line 9-9 of Fig. 1 and viewed in the direction of the arrows.

Referring to the drawings, 1 and 2 are mould cylinders secured on

shafts

3 and 4, respectively, journaled in uprights a and b. Rotation is imparted to the shaft f the lower mould cylinder 2 by any suitable means (not shown) and is transmitted to the shaft 3 of the upper mould cylinder 1 through the medium of gears 4 and 3'.

Cavities c and cl are formed in the

cylinders

1 and 2 and during the rotation of these cylinders the cavities in the cylinder will successivelyregister in pairs. Grooves 11 extend from both ends of each cavity 0 in the cylinder 1, and similar grooves 11 extend from the ends of the cavities d in the cylinder 2. As the cylinder 2 is longer at one end than the cylinder 1, the grooves 11' are correspondingly longer at that end.

Discs

5 and 2 1 of somewhat larger diameter than the cylinder 2 are seated on its shaft 4 at both ends of the cylinder and are provided with perforations, for the reception of

cores

6 and 26, respectively, which are adapted to reciprocate in the perforations under Fig. 6, with the object of forming the air outlet of the whistle. This projection extends as far as the core 6 and displaces the plastic substance at that point. Obviously the projections 27 might as-well be formed in the cavities d of the cylinder 2, or in both cavities, as desired. The plastic substance, for instance a sugar solution is supplied by a chute 7 and a hopper 10 is arranged slightly in advance of the chute and charged with handles such as short wooden sticks for the whistles. These handles it discharges into the longer grooves 11 of the-cylinder 2. A knurled roll 23 is carried by an arm 23 which is freely journaled on the shaft- 3. This roll is arranged between the disc 5 andthe cylinder 1 opposite the hopper, and retains any handles which might leave said hopper after the corresponding groove 11 has moved past it.

A cam drum 16 with a groove 17 and apinion 16 are arranged in front of the upright a. Rotation is imparted to said pinion from the shaft 4 through suitable gearing (not shown). A pin or roller 18 at the end of a doublearmed lever 15 is inserted in the groove 17 (Fig. 2). The lever 15 is fulcrumed at 15 in a bracket 6 secured to the upright a and connected with a slide 14; through a link 14. A core extractor 12 and a push bar 13 for the handles extend in parallel from said slide toward the disc 5 of the cylinder 2.

The extractor 12 is shown on a larger scale in Figs. 4 and 5. Its end is provided with a fork 19 comprising two

teeth

20 and 21. When the cylinder 2 rotates, bosses 6 at the ends of the cores 6 enterbetween these teeth.

The operation of this machine is as follows:

The

cylinders

1 and 2 rotate as indicated by the arrows in Figs. 2 and 3, and the

cores

6 and 26 penetrate gradually into the cavities d, as they approach the gaps in the

cams

8 and 25, and finally abut against each other as shown in Fig. 6, when a pair of cavities c and d are in register Shortly before this occurs, the cavity 03 hasbeen charged with L I sugar solution from the chute 7, and, as at this time the cores have penetrated a considerable distance into the cavity, they do not expel the plastic substancebut, on the contrary, the plasticsubstance fills the space of the cavity which surrounds the cores. As shown in Fig. 6, the mould is completed by the 'two cavities 0 and d, the

cores

6 and 26 and the projection 27 which shapes the airhole in the Whistle. As the rotation of the cylinder 2 continues, the bosses at the ends of the

cores

6 and 26 glide off the corresponding cams and are forced into the gaps of thecams by their pull-

back springs

8 and 28, respectively. As regards the cores 26, the springs can be relied upon to retract the cores as these latter are buried in the plastic substance a short distance only and therefore, means for extracting the cores 26 are not provided, but the function is not'so reliable for the cores 6, and-therefore the extractor 12 is now moved to the left ,in Fig. l by the groove 17 and the lever 15 and positively extracts the core 6 from the mould. As soon as the corresponding groove 11 has been laid open by the re tracted core 6, it is entered by one of the handles from the hopper 10, this handle, on continued rotation of the cylinder 2, being pressed into the groove bythe knurled roller 23: Meanwhile the core 6 which was just extracted will have cleared the extractor 12 and will be engaged by the push bar 13, so that when the slide 14 is again advanced to the right by the groove 17 the'core will be advanced pushing the handle into the cavity formed by the core 6. Atthe same time the extractor 12 will engage the core 6 of the succeeding mould. Some play must be provided so as to enable the pusher and the extractor to perform their functions while the

cylinders

1 and 2 are rotating. The finished whistle is now free and as the mold cylinder revolves itidrops out of the machine.

this end, the heads of the cores 26 are cut away on their outer edges at 31 and an angular flange 29 is formed on the cylinder 24 against which such cut-away or flattened edges 31 abut and hold the cores against rotation. Obviously, instead of being circular, as shown, th head ofthe cores 26 may be of any suita e shape and the edges 31 may be straight or curved, as convenient;

Obviously, it is also possible to manufacture articles of the kind described without handles or other insertions, and the mechanism for extracting the cores 6 may be eliminated without departing. from the spirit of my invention, and I Wish it to be understood that I do not desire to be limited to the exact details of construction shown and described for obvious modifications will occur to a person skilled in the art.

I claim:

1. Machine for manufacturing tubular bodies from plastic substances comprising a palr of cooperatlng cylinders, each defining part of a mould cavity, means for-rotating.

said cylinders so that said cavities combine into a complete mould, co-axial cores inserted in one of said cylinders and means for reciprocating said cores in opposite directions.

2. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part of a mould cavity, means for rotating said cylinders so that said cavities combine into a complete mould, a core inserted in one.

'into a complete mould, a core inserted in one of said cylinders, a stationary helical cam adapted to advance said core into said mould,-

said cam being partly recessed, and means for retracting said core from said mould when it has been released by said recessed portion of said cam.

4. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, eachdefining part of a mould cavity, means for rotating said cylinders so that said cavities combine into a complete mould, cores inserted in one of said cylinders, stationary helical cams adapt-.

ed to advance each core into said mould, one of said cams being of greater pitch than the other, and means for retracting saidcores from said mould.

5. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part of a mould cavity, means for rotating 'said cylinders so that said cavities combine into a complete mould, a core inserted in one of said cylinders, means for advancing said core into, and separate positive means for re-' tracting it from, said mould.

6. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part of a. mould cavity, means for rotating said cylinders so that said cavities combine into a complete mould, a core inserted in one i of said cylinders, means for advancing said core into, and positive and resilient means for retracting it from, said mould.

7. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part of a mould cavity, means for rotating pair of cooperating cylinders, each defining part of a mould cavity, means for rotating said cylinders so that said cavities combine into a complete mould, one of said cylinders defining a groove in continuation of said mould, a core adapted to be advanced and retracted in said groove and said mould, means for inserting a member in said groove, and means for advancing said member into said mould after said core has been retracted therefrorn 9. Machine for" manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part of a mould cavity, means for rotating said cylinders so that said cavities combine into a complete mould, one of said cylinders defining a groove in continuation of said mould, a core adapted to be advanced and retracted in said groove and said mould, means for inserting a member in said groove, means for depressing said member into said groove, and means for advancing said member into said mould after said core has been retracted therefrom.

10. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part of a mould cavity, means for rotating said cylinders so that said cavities combine into a complete mould, a disc arranged at one end of said cylinders, said disc being of larger diameter than said cylinders, a core inserted in said disc where it projects beyond said eyl-.

inder, and means for advancing said core axially into and for retracting it axially from said mould.

11. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part of a mould cavity, means for rotat ng said cylinders so thatsaid cavit1es combine into a complete mold, a core inserted in one of said cylinders, means for advancing sa1d core axially into, and for retracting it axially from, said mould, and a projection in one of said cavities adapted to cooperate with sa1d core so as to form ahole in said moulded object.

12. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part of a mould cavity, means for rotating sa1d cylinders so that said cavities combine into a complete mould, a core inserted in one of said cylinders and bevelled at its inner end, means for advancing said core into, and for retracting it from, said mould, and a projection in one of said cavities adapted to cooperate with said core so as to form a hole in said moulded object.

13. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part of a mould cavity, means for rotating said cylinders so that said cavities combine into a complete mould, a core inserted in one of said cylinders and bevelled at its inner end, means for preventing rotation of said core, means for advancing said coreinto, and for retracting it from, said mould,'and a projection in one of said cavities adapted to cooperate with said core so as to form a hole in said moulded object.

14. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part of a mould cavity, means for rotating said cylinders so that said cavities combine into a complete mould, a core inserted in one of said cylinders and bevelled at its inner end, a head on the outer end of said core, said head being non-circular on part of its edge, a check on the cylinder in which said core is inserted, said check being adapted to cooperate with said non-circular portion so as to prevent rotation of said core about its axis, means for advancing said core into, and for retracting it from, said mould, and a projection in one of said cavities adapted to 00- operate with said-core so as to form a hole in said moulded'object.

15. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part. of a mould cavity, means for rotating said cylinders so that said cavities combine into a complete mould, a core inserted in one of said cylinders and bevelled at its inner end, a head on the outer end of said core, said head being non-circular on part of its edge, an angular flange on the cylinder in which "said core is inserted, said angular flange being adapted to cooperate with sa1d noncircular portion so as to prevent rotation of said core about its axis, means for advancing said core into, and for retracting it from, said mould, and a projection in one of said cavities adapted to cooperate with said core so as to form a hole in said moulded object.

16. Machine for manufacturing tubular bodies from plastic substances comprising a pair of cooperating cylinders, each defining part of a mould cavity, means for rotatmg lar portion so as to prevent rotation of said core about its axis, a stationary helical cam 1 arranged within said angular flange and adapted to advance s'aid core into said mould,

and means for retracting said core from said mould.

. In testimony whereof I afiix my signature.

' ARTHUR HAN NS.