US2567666A - Machine for spinning concrete poles, columns, pipes, and other concrete units - Google Patents

Description

GOULD MACHINE FOR SPINNING CONCRETE POLES, COLUMNS,

Sept. 11, 1951 PIPES, AND OTHER CONCRETE UNITS Flled Aug, 6, 1947 L/JL mvmmf MM y $001.0

NW m ilm MA I I B Patented Sept. 11 1951 MACHINE FOR SPINNING CONCRETE POLES, COLUMNS, PIPES, AND OTHER CONCRETE UNITS Harry Gould, WestfielcLErigland Application August 6, 1947, Serial No. 766,604 In Great Britain April 9, 1942 Section 1, Public Law 690, August 8, 1946 Patent expires April 9, 1962 4 Claims.

The present invention relates to a machine for the manufacture of hollow concrete bodies, such as pipes, columns, poles, and the like, by the spinning process, and has for one object 'to enable simple and lightly constructed moulds to be used.

According to the main feature of the present invention the machine comprises a spinning frame built up of a plurality of longitudinal members extending between spaced track wheels supported on driving and idle wheels, carrier members adapted to be clamped round a tubular mould and adapted to be engaged between said longitudinalmembers, and means for clamping said carrier members to the said longitudinals, and according to a further feature of the invention said means for clamping said carrier mem. bers to said longitudinals are such as to permit adjustment of the carrier frames to centre the mould in relationto the spinning frame.

In the case of the present invention, therefore, moulds are used in association with a strongly built spinning frame into which the moulds can be removably inserted, centralised and fixed. The spinning frame is made strong enough to take the loads and stresses set up in spinning, so that the moulds themselves can be of simple and light construction. A plurality of interchangeable moulds can be used with a single spinning frame, so that the latter may be continuously operated without loss of time, save for the short periods occupied in loading and unloading the moulds into and out of the spinning frame.

According to one construction for carrying the invention into practice the spinning frame comprises two or more longitudinal members consisting of rolled steel sections fitted permanently within a pair of spaced track wheels located towards the ends of the longitudinals. The track wheels rest on pairs of driving or runner wheels mounted on a common power driven shaft beneath the spinning frame, so that the whole weight of the spinner is borne by said runner wheels. I

At two or more points along their length the moulds are provided or fitted with carrier rings of a diameter to enter the space between the said longitudinals, and having runners to facilitate the running of the mould into and out of the spinning frame along its lowermost longitudinal member. When correctly located centrally within the spinning frame the mould is clamped in position by set screws passing through the longitudinals which engage with the mould carrier rings.

To facilitate the running of the moulds into and out of the spinning frame, a runway is dis- 'posed adjacent to one or both ends of the spinner, in continuation of the lowermost longitudinal member when the frame is at rest, so that the runners of the mould carrier rings may run from the longitudinal of the frame on to the runway.

. 2 By providing a runway at each end of the spinning frame, a new mould may be run into one end of the frame at the same time as a filled mould is run out of the other end of the frame,

way of example in the accompanying drawing, in

which:

Figure 1 is a longitudinal elevation of one construction of machine according to the invention;

Figure 2 is a cross-sectional view to a larger scale on the line II-II of Figure 1; and

Figure 3 is a detail view also to a larger scale of a portion of the mould with one of the mould carrier rings applied thereto, and shown in edge elevation. l

The mould consists of a cylindrical or taper tube I, closed at its ends by removable plates 2. one or both of which is or are provided with a filling opening, which is closed after filling, until spinning has commenced, by a plug, which plug is removed as soon as spinning has started, in order to permit a free circulation of air through the mould during spinning and thus facilitate setting of the concrete.

The mould tube I may have no joints therein, or it may, as shown, be divided longitudinally and flanged along its edges at 3. If of great length transverse joints may also be provided. Sufficient concrete is filled into the mould to give the calculated volume, and thus of wall-thickness, of the finished post, and as soon as spinning takes place the concrete becomes thrown out against the wall of the mould, so as to produce an axial cavity in well known manner.

The mould l is rotated by means of a spinning frame into which it is inserted, and from which it is removed after the concrete has set. This spinning frame, in the construction illustrated, comprises a pair of flanged track wheels, 4, 4, supported on driving and runner wheels 5 journalled in suitable bearings carried by an underframe. There may be any number, exceeding two, of these wheels 5, disposed arcuately to support each of the track wheels 4. One opposite pair, at least, of the wheels 5 are mounted on a common cross shaft 6, adapted 'to be driven by power, as, for example, by means of a chain sprocket l.

Passing through the track wheels 4, and attached permanently thereto, are three longitudinal channel members 8, consisting of rolled steel sections, so that the track wheels 4 are connected together by the longitudinals 8 to form the spinning frame proper.

Themould I is removably mounted in the spinning frame with the aid of two or more car 3 rier members or rings 9, which, as will be seen from Figures 2 and 3, consist of two parts adapted to be clamped round the mould I, by means of screw bolts I!) so as to grip the mould parts or mould flanges 3 between them.

The mould carrier members 9 are built up of spaced plates II, distance sleeves I2, and spacing blocks I3, I4, and when the two parts of the carrier members are assembled, the carriers are of substantially hexagonal shape, with alternate long and short sides, and divided in an' axial plane parallel to one of the long sides. The spacing blocks I3, I4 are located at the short sides of the carrier member, and they are each bored radially and threaded for the purpose hereinafter explained. The spacing block I4 carries a small wheeled trolley I5.

At points along the longitudinals 8, between the track wheels 4, 4, the longitudinals are joined together by inclined braces I6 and carry blocks I9 through holes in which screw bolts I'I, fitted with lock nuts 20, pass loosely and extend into the channels of members 8. The carrier members 9 are clamped on the mould in positions corresponding to the position of the screw bolts ll of the spinning frame, so that when the mould I is inserted into the spinning frame the holes in the blocks I3 and I4 of the carriers 9 register with the screw bolts II.

It will be understood that the mould I is insorted axially in the spinning frame, and this operation is facilitated by a channel section track I8 laid adjacent to one end of the spinning frame, the filled mould ready for loading into the spinnin'g frame being disposed on the track formed by said channel section I8 with its trolleys I in the channel thereof. The spinning frame is then brought into position aligning one of its longitudinal channel sections 8 with the external track section I8, and the mould I is transferred longitudinally into the spinning frame, its trolleys I5' running along the track I8 and the aligned longitudinal 8, and the other short sides of the carriers 9 engaging in the other channel sections 8 of the spinning frame. When the mould has been run into the correct position in the spinning frame, the spacing blocks I3, I4 of the carriers 9 come into register with the screw bolts I1, and these are then screwed up so as to engage in the threaded holes in the spacing blocks I3 and I I and the lock nuts are screwed up so as to abut against the blocks I9, thereby holding the whole mould assembly securely in position in the spinning frame. It

will be understood, of course, that by adjusting the bolts I! and lock nuts the mould I can be correctly centered in the spinning frame, so as to be coaxial therewith.

The apparatus is then ready for carrying out the spinning operation, which results from applying driving power to shaft 6. Rotation of wheels 5 rotates the track wheels I and thus spins the frame in which the mould I is fixed. When the spinning operation is finished the mould I is removed from the spinning frame by reversing the loading operations, and finally running the mould out of the frame on the loading track I8, or on to a similar track laid at the opposite end of the spinning frame, so that a new mould for insertion into the frame can always be held ready on track I8. V

The invention is not limited to the above described construction, since such construction may be modified and other constructions devised, within the scope of the invention herein described.

I claim: I

1. A machine for manufacturing centrifugally molded hollow concrete bodies, as pipes, columns and the like, comprising spaced coaxial track wheels, longitudinal members extending between said spaced track wheels, a tubular mold, carrier means adapted to be clamped around said mold. trolley wheels carried by said carrier means, said trolley wheels being adapted to run along one of said longitudinal members for initiall positioning said carrier means and mold between said longitudinal members, means clamping said carrier means to said longitudinal members, spaced coaxial driving wheels, and means whereby said track wheels are adapted to be supported resting in driving engagement with said driving wheels.-

2. A machine for manufacturing centrifugally molded hollow concrete bodies,- as pipes, columns and the like, comprising a rotatable cage including longitudinal member spaced around the'axls of rotation, a tubular mold, carrier means adapted to be secured to said mold, trolley wheels carried by said carrier means, said trolley wheels being adapted to run along one of said longitu dinal members for initially positioning said carrier means and mold within said cage, and means securing said carrier mean to said cage.

3. A machine for'manufacturing centrifugally molded hollow concrete bodies, as pipes, columns and the like, comprising an elongated housing rotatable about a longitudinal axis, a tubular mold, carrier means adapted to be secured to said mold, trolley wheels carried by said carrier means, said carrier means and mold being adapted to be introduced into said housing at one end thereof and said trolley wheels to run along the inside of said housing for initially poistioning said carrier means and mold within said housing, and means securing said carrier means within said housing.

4. A machine for manufacturing centrifugally molded hollow concrete bodies as pipes, columns and the like, comprising in combination a tubular mold shell, spaced track wheels disposed coaxially with said mold shell, three longitudinal bars extending circumferentially spaced about the mold shell between said track wheels and joining the latter, carrier means encompassing said mold shell, clamping means for securing the carrier means to the longitudinal bars, said clamping means including three screw bolts, each passed loosely through a corresponding hole in one of said bars and engageable with a corresponding threaded hole in the carrier means and three lock nuts each threaded upon one of said bolts and adapted to be screwed into abutment with a surface of the respective bars for center ing the mold shell relative to said track wheels by relatively adjusting said bolts and nuts, and drive wheels engageable with said track wheels;

HARRY GOULD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,771,099 Righe'tto July 22. 1930 1,865,692 Hume July 5, 1932 2,161,968 Lyons et al June 13, 1939 FOREIGN PATENTS Number Country Date 247,257 Great Britain Feb. 3, 1926

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