US2328071A - Apparatus for pug making - Google Patents

Description

l ug- 31, 1943 A. c. JAECKEL 2,328,071

APPARATUS FOR PUG MAKING Y Filed July 3, 1941 2 Sheets-Sheet l Flai.

Add/Jh c raecm INVENTOR. W M Anomax Aug.31, 1943. A. c. JAECKEL APPARATUS FOR PUG MAKlNG Filed July 3, 1941 4 2 Sheets--Sheet 2 AT Tomaat Patented -Aug. 3l, 1943 APPARATUS FOR PUG MAKING `Adolph can Jaeekel, Milwaukee, wis., assignor t6 A. 0.` Smith Corporation, Milwaukee, Wis., a corporation of New York Application July `s, 1941, serial ivo.` 400,976

2 Claims.

This invention relates to an `improved pug making press. 1 I Cylindrical pugs of plasticmaterialin varying sizes are utilized" in extrusion presses inthe coating of welding Objects;` f

Heretofore, pugs have been made in various ways, one ofthe principal ways beingfto employ a'press `in which 4the `pugging cylinder vis disposed below the -power cylinder. Positioning these cylinders in this manner requires apress of! considerable height `and weight, as the pug'- ging piston must be capable of being raised above the upper end of' the puggingcylinder to make such end; accessible for loading purposes. Withthe piston above the, cylinder duringloading there was ,considerableuda'nger of injury to the operator. 1

Also in the old type of press the pugging cyllnder was provided with a `sliding bottom` to permit the formed pug to drop to the floor for removal which was at aninconvenient `heightior the operator of the machine. I I y The main object of the present invention is to provide `an improved pug making `press which will eliminate the dra-Wbacksof the former types o1 presses and which `is morecompact,` more eicient and less costly to operatethan the presses `heretofore used. I v I q f Generally speaking the invention comprisesa `machine wherein the `power cylinder andpiston electrodes and other similar;u

from the following description and 'the accompanying drawingsin which: I I

Figure 1 is a front'ele'vati'on showing a press embodying the' invention,- part of which has been broken and sectioned away to .shew its construction; y

Fig. 2f is a head of. the pugg-ing cylinder in closed position;

Fig. 3 is a detailed view showing the-head in open position; and I l Fig. 2lis a longitudinal of thepuggingpiston.`

` The pug making press shownby the'drawings comprises standards `l carrying a vertically disposed hydraulic or power cylinder 2 located in axial `alignment below`a` vertically disposed puggingcylinder 3, supported by the power cyl` inder. I

Power piston 4 is reciprocably disposedinhy` draulic cylinder, and pugglin'g piston 5 is adapte` central sectional view Ned for reciprocation in puggihg cylinder` `3'. vA

pugging piston 5 causing power are `located below lthe pugging pistonand cyl index'. These pistons are` connected `by a com mon piston rod causing the pugging piston to be driven by the power piston. y

A removableheadis 'provided to close the top of the pugging cylinder and the removallof `this head permits the operator to load and unload the pugging cylinder and yet it is so constructed that it is held as a seal'tight cover on the top of `the pugging cylinder when closed. The head is hinged to the cylinder and is held in place by tension members which are pivoted to the cylinder` support and linked to the head to provide "for tilting of the head on its hinge.

`With the machine constructed in this` manner the operator can perform the loading and unloading operations at a convenient height without any overhead apparatus to hinder him,

' thereby saving` time and increasing production.

This type of construction facilitates cleaning operations, as the pugging piston can be either withdrawn from the lower end of its cylinder or raised above the top end.

Other objects of this invention will be ,apparent common Ypiston rod 6 connects power lpiston 4 to ciprocablydrive bugging piston 5. 4 Hydraulfic'cylinder 2 is double acting and has a head 1 at its lower Vend Withafsuitableaperture 8 foi" connection with a source Volf uid power. rIhe upper end of the hydraulic cylinder 2` is closed by a head 9 and is provided with an vape'r` ture I0 above the piston 4 for connection with a source of fluid power. Hydrauliccylinder 2 at its top is attached to standards Ibyscrews Il and keys Il `Packing material orfgland I3 encases Piston rody l6, where it passes through` head 9, `to prevent leakage of fluid from hydraulic cylinder2. -I

Bolts `I4 pass through earson the lower flanged end I5 of cylinder-.1.3, head 9 and the upper flanged Aend `of cylinder 2 lto secure-the parts together. Spi'icerslet-:ves` I6` encircle the bolts intermediate the cylinder 3 and head 9 to maintain the cylinder 3 in spaced relation above cylinder 2 and thus permit withdrawal of pugging piston 5 from the bottom of cylinder 3, as shown in Figure 1, and allowthe operator to examine and` clean the cylinder and piston. Angular webs Il reenforce the ilange at the lower end of cylinder 3.

Pugging cylinder 3 has a removable top head sired.,l Pivotal arms 2i)` linked to the top of head I8 by bifurcated link 2l and secured to standards I by pins 22, serve as a, pair of tension members side elevation of the "press with the` to sustain the pressure against head I8 when the pugging process is in operation. Other suitable methods of securing head I8 to the upper end of pugging cylinder 3 may be employed. f

Pugging piston 5 consists of a metallic head or top 23 attached to the bottom 24 by a bolt 25. Bolts 26 connect the pugging piston 5 to piston rod 6. Packing material 21 serves as a wiper or cleaning means when the piston is operating in its cylinder.

On the bottom of pugging piston 5 is located a circumferential skirt 28 which may be formed by providing an annular groove 29 between the rim of the piston 5 and piston rod 6; The purpose of the circumferential skirt 2.8 is to prevent leakage fluid that may be squeezed or expressed from the material being pugged or water used in cleaning the cylinder from reaching piston rod 6;

When leakage :duid reaches circumferential skirt 28 its passage toward piston rod 6 is obstructed and it either runs down the cylinder wall or drips into recep-tor 30 positioned on the rhead 9 of power cylinder 2. Leakage uid from the cylinder wall also drips into the receptor.

Receptor 3D may be of annular trough shape having an inner generally conical flange 3l loosely encircling the piston, rod. A drain pipe 32 is connected to the trough for carrying off the leakage fluid. k

In the operation of the machine shown and described, head I8 is first removed or swung back from the top of pugging cylinder 3. Fluid is then forced into the bottom of power cylinder '.2 through aperture 8 causing power piston 4 to be pushed upwards. The movement of power piston 4 upwards advances pugging piston 5 into the lower end of pugging cylinder 3 by means of the connecting or common piston rod 6,

After pugging piston 5 enters pugging cylinder 3 itsupward movement is stopped by the withholding of further entry of uid into the bottom of power cylinder 2 to permit the loading of the plastic material through the open` top of pugging cylinder 3. When such loading has been completed head I8 is closed over puggng cylinder 3 and the toggle links formed by` pivotal arms 20 linked to head I3 by links 2| and to framevl by pins 22 are pushed into place to securely seal head I8 on the top of pugging cylinder 3. k f

Pugging piston 5 supporting its plastic content is then advanced upwardly toward head I8 by the forcing of more fluid into the bottom of power cylinder 2, until the material in cylinder 3 is pressed into a pug of the desired consistency. The pressurein cylinder 2 is then released,the toggles links loosened, the head I8 swung back and reduced pressure applied to cylinder 2 to raise the pug out of cylinder 3, where it will be conveniently accessible to the operator,

When the pug has been removed the pugging piston 5 is lowered to the bottom of the pugging cylinder 3 by the entry of pressure fluid through aperture I3 at the top of power cylinder 2 above piston 4 and exhausting the fluid out of the bottom of power cylinder 2 through` aperture 8. After the pugging piston 5 is lowered to its position in the bottom of the pugging cylinder 3, as shown in Fig. 3, the operator reloads the cylinder 3 and replaces the head I8 for repeating the pugging operation.

While the above described operation is in process uid squeezed out of the material being pugged leaks by piston 5 and is prevented from reaching the piston rod b-y skirt 28. The uid .runs down the cylinder wall and drips into receptor 3l! or if the piston is withdrawn from the bottom of its Cylinder the uid will drip directly from the skirt 28. Fluid in the trough will be drained through connection 32.

After a number of pugging operationsA have been completed, pugging piston 5 may be either raised above the upper end of cylinder 3, or withm drawn from the bottom of the cylinder so that the apparatus may be thoroughly Vinspected and cleaned before further operations are resumed.

I claim:

l. In a machine of the class described, a cylinder having a piston operating therein through one end thereof, a support for said cylinder, a removable head for said cylinder hinged to one side thereof for tipping out of the way to provide for loading the cylinder with material to be compressed, and a toggle link having a shorter member pivoted to said head above and near the center thereof and a pair of longer members pivoted to said cylinder support on opposite sides of the cylinder constituting tension'members to secure the head tightly against the cylinder when closed and relieving said hinge from substantial pressure.

2. In amachine of the class described, a cylinder, a support for said cylinder, a removable head for said cylinder hinged toone side thereof for tipping out of the way to provide for loading the cylinder with material to be compressed, and a toggle link having 'a Yshorter member pivoted to said head above and near the center thereof and a pair of longer members pivoted at their upper ends to said shorter member and at their lower ends to said cylinder support on opposite sides of the cylinder constituting tension members to secure the head tightly against the cylinder when closed and relieving the hinge from substantial pressure, said pivot point between the toggle members being laterally movable to provide for lifting said head and tilting the same on its hinge.

ADOLPH C. JAECKEL.

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