EP0462990B1 - Conveying device for casting cores and moulds - Google Patents

Abstract

A continously operating conveying device, in particular for handling casting cores and moulds, has an endless rotating conveyor (2) belt with equidistantly spaced perforation grippers (1) which are supplied and controlled with air via an annular line (3) with connection pieces (4). The perforation grippers co-operate synchronously with a rotary distributor (6) which is provided with resiliently mounted connection pieces (7) and is arranged on a drive shaft (7). Use of this device permits fully automatic, continuous handling or processing of individual or interconnected casting cores and moulds at the production speed.

Description

The invention relates to a transport device, in particular for foundry cores and molds / according to the preamble of patent claim 1.

Such a device is known to the applicant from actual practice.

In foundry technology, especially when casting molded castings, cores or molds are manufactured separately, manually brought together and connected and then individually pushed into a blackening device, which mechanically clamps the cores, which takes up too much space and also has only a low holding force.

The object of the invention is to blacken individual or interconnected foundry cores and molds, in the present case screwed sole and water jacket cores, fully automatically and continuously with the production rhythm of the core or mold production or to treat or otherwise treat them.

This object is achieved by the technical teaching described in the characterizing part of patent claim 1.

The device according to the invention is integrated in a fully automatically linked process, which in the present case extends from the production of the cores via the merging - connection - blackening to storage on a drying belt. The recording and mounting on the system for further treatment, in the present case on the blackening machine / takes place in the same space-saving intervals that are also given during production. The holding force of the hole gripper is infinitely variable.

• Fig. 1 zeigt eine Gesamtansicht der Vorrichtung im Schnitt in Querrichtung an der Linie x-x gemäß Fig. 3a;
• Fig. 2 stellt einen Detailschnitt in Querrichtung an der Linie y-y gemäß Fig. 3a dar;
• Fig. 3a ist eine schematische Darstellung der Luftversorgung und Steuerung der Vorrichtung, während Fig. 3b eine Teilansicht der Antriebswelle im Schnitt mit den Anschlußventilen darstellt;
• Fig. 4 zeigt schließlich eine Detailzeichnung des Lochgreifers im Schnitt.

The drawings in conjunction with the following description illustrate an embodiment of the invention.

• Fig. 1 shows an overall view of the device in cross section on the line xx of FIG. 3a;
• FIG. 2 shows a detail section in the transverse direction on the line yy according to FIG. 3a;
• Fig. 3a is a schematic representation of the air supply and control of the device, while Fig. 3b shows a partial view of the drive shaft in section with the connection valves;
• Fig. 4 shows a detailed drawing of the hole gripper in section.

The connected cores are brought with a gripper and transport device 10 from the connection point to the "feed station" of the blackening machine and are placed there on the hole grippers 1 (three connected cores per cycle). The conveyor belt 2 is then moved forward by one cycle (1,200 mm). Via a cam valve 4 rolling off the run-up bar immediately after the start, air is conducted via the ring line 3 to the hole grippers 1, which press against the core wall and thus hold the cores in position. After two bars, the core group is hanging down in the "diving station". Here the cores are flooded by lifting a basin filled with blackness.

During the further cycle sections, the unnecessary blackness drips into a basin. At the "transfer station", the hole grippers 1 are made airless by running on another cam valve 11 on a rail, so that the core group can be brought to the drying ovens with another gripping and transport device.

The distances between the hole grippers 1 are set automatically when passing through a link 13, which is brought to the type-specific distance with a spindle 9.

The main air supply takes place via a rotary distributor 6 on the drive shaft 5 to three spring-mounted connecting pieces 7, which are actuated by cam valves, which are actuated by thrust pieces located on the drive shaft 5, always to the connecting pieces 7, which are in the respective position in contact with the the conveyor belt 2 located counterpart.

The empty fitting 7 is closed by running off the relevant cam valve 4 from the ramp.

The actuation of the fifteen contact pieces 12 (opening and closing) is carried out mechanically by the movement of the conveyor belt 2 by running up the actuating lever, i. H. only the two counterparts that are currently in contact with the spring-mounted connecting pieces 7 are open in the cycle.

Claims (2)

1. Continuously operating transport device in particular for handling casting cores and casting moulds, consisting of an endlessly rotating conveyor belt (2) having holding devices or perforation grippers (1) disposed at regular intervals, characterised in that the perforation grippers (1) can be supplied with and controlled by air via an annular line (3) which is coupled to the conveyor belt (2) and has connection valves (4); and in that the perforation grippers (1) cooperate synchronously with the connection valves (4) via a rotary distributor (6) disposed on a drive shaft (5) and via resiliently mounted connection pieces (7).
2. Transport device according to Claim 1, characterised in that the perforation grippers (1) can be adjusted synchronously with respect to one another at specific intervals on an adjusting shaft (8) via a spindle (9).

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