JPH0353792Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a device for removing core sand adhering to cylinder block castings, and is particularly effective in removing core sand adhering between narrow bores. The present invention relates to a device adapted for removal.

(Prior art) In recent years, there has been a tendency for multi-cylinder automobile engines to have higher output through the use of exhaust turbo superchargers. The heat load is increasing. For this reason, it is desired to improve the cooling efficiency of the upper part of the bores by circulating cooling water between the bores of the cylinder block. on the other hand,
The distance between each cylinder bore must be as narrow as possible in order to make the engine smaller and lighter.

In order to simultaneously satisfy these contradictory issues, the following cylinder block structure has already been developed. That is, as shown in Figure 1,
A gear guard 3, which is a metal protection member, is arranged between each bore 2 of the cylinder block 1, and a space is formed in the gear guard 3 to allow cooling water to flow through the space. When casting this cylinder block casting, first, the gear gar 3, which is a metal protection member filled with core sand in advance, is placed in the mold, and then only the core sand in the gear gar 3 is removed from the casting surface. At this time, the gear gar 3 is held in a cast state, and the space formed in the gear gar 3 is communicated with the water jacket 4, and the top deck part of the cylinder block 1 is provided with water on the cylinder head side. Vertical hole 5 that allows cooling water to flow through the jacket
is drilled.

By the way, it is known that air blowing is used to remove sand from the inside of a casting, as shown in Japanese Patent Application Laid-Open No. 148073/1982, but in such a cylinder block structure, the core sand filled in the gear 3 after casting is removed. Since the empty space in the gear gar 3 is narrow, it is difficult to remove the core sand, and it takes a long time to remove the core sand. Furthermore, if core sand were to remain in the gear gar 3, a problem would occur in that the core sand would get mixed into the cooling system of the engine and damage the cooling system equipment. For this reason, there has been a need for an apparatus that can easily, quickly and reliably remove the core sand adhering between the bores of a cylinder block casting.

(Purpose of the invention) The present invention was devised in consideration of the above circumstances, and its purpose is to easily remove core sand stuck in the narrow spaces between each bore of a cylinder block casting in a short time. The purpose of the present invention is to provide a device that can reliably remove such substances.

(Structure of the invention) To achieve this purpose, the invention is structured as follows. That is, a cast cylinder block for a multi-cylinder engine is covered with a cover body that moves from the top deck side, a positioning guide member is provided on this cover body, and the guide member is inserted into a hole drilled in the top deck part. A plurality of blow pipes are provided hanging from the upper wall of the cover body, and the blow pipes are inserted into the water jacket through a water hole or a sand removal hole among the holes of the top deck part to open the water jacket. The tips of the blow pipes are opposed to the spaces between the respective bores in order to blow out high-pressure air, and an air supply pipe is connected to the base end of the blow pipes, and a suction duct is connected between the cover body and the suction machine. A positioning guide member is extended below the lower end of the blow pipe, and a positioning guide member is attached to the cover body to regulate the vertical position of the cover body in contact with a predetermined part of the cylinder block casting. It is equipped with a section. Therefore, the core sand adhering to the spaces between the respective bores can be removed by high-pressure air jetted from the blow pipe, and the removed core sand can be sucked up by the suction machine through the suction duct.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 2 to 4. FIG. 2 is a plan view showing a top deck part 11 of a cylinder block casting 10 for a multi-cylinder engine, for example, a four-cylinder engine. A vertical hole 5 (which is sometimes used as a sand removal hole) and a vertical hole 5 (which communicates with the water jacket on the cylinder head side) are bored. The gear gar 3 is cast between each bore 2 of the top deck portion 11.
A space between each bore 2 is formed therein.

A device for removing core sand adhering to the spaces between the respective bores 2 will be explained with reference to FIGS. 3 and 4. In the figure, reference numeral 15 denotes a cover body, and this cover body 15 has a container shape with an open bottom, and is formed to move from the top deck portion 11 side of the cylinder block casting 10 to cover the cylinder block casting 10. . A positioning guide 17 is suspended from the upper wall 16 of the cover body 15. This positioning guide 17 is
The cover body 15 has a cylindrical shape that is inserted into bores 2 at both ends of the hole drilled in the hole 1, and positioning guides 17 are inserted into the bores 2 to position the cover body 15. In addition, positioning guide 1
7 extends below the lower end of a blow pipe 18, which will be described later.

A plurality of blow pipes 18 are suspended from the cover body 15 by penetrating the upper wall 16. The blow pipes 18 are arranged in two rows so as to sandwich each bore 2 of the cylinder block casting 10, and are drawn into the water jacket 4 through the water hole 13 in the hole bored in the top deck part 11. It is now being inserted into. The lower end of the blow pipe 18 arranged in the middle part is inserted into the water jacket 4 as shown in FIG. The lower ends of the blow pipes 18 arranged at both ends are bent toward the end of the water jacket 4. Also,
A base end, that is, an upper end of the blow pipe 18 is connected to an air supply pipe 19 above the cover body 15.
This air supply pipe 19 has a frame shape, which is composed of a blow pipe connection part 19a to which the upper end of each blow pipe 18 is connected, and an air hose connection part 19b to which an air hose 20 for supplying high pressure air from a compressor (not shown) is connected. No, it is fixed to the cover body 15 via a bracket 21, and the operator grasps the air supply pipe 19 during work to move the entire device.

Further, one end of a suction duct 23 is connected to both side walls 22 of the cover body 15 so as to communicate with the interior of the cover body 15 . A suction machine (not shown) is connected to the other end of the suction duct 23, and is adapted to suction the air inside the cover body 15.

Furthermore, the air supply pipe 19 is suspended via a wire 25 by an air balancer 24 provided above, and the air balancer 24 supports the weight of the entire device, so that only a slight force is applied by the operator. The entire device can be moved in any direction.

Furthermore, a predetermined portion of the cylinder block casting 10, for example, the top deck portion 11, is attached to the cover body 15.
A position regulating portion 16' that comes into contact with the upper surface of the cover body 15 to regulate the vertical position of the cover body 15 is provided.
In the case of the illustrated cover body 15, the upper wall 16 corresponds to the position regulating portion 16'.

The operation of an embodiment of the apparatus having such a configuration will be explained. When removing core sand adhering to the spaces between the respective bores 2 of the cylinder block casting 10, the cover body 15 is moved from above to below the top deck part 11 of the cylinder block casting 10, and the lower end of the positioning guide 17 is removed. are inserted into the bores 2 at both ends and fitted, and the blow pipe 18 is inserted into the water hole 13 while being accurately guided by the positioning guide 17. Then, the upper wall 16 is brought into contact with the top deck portion 11. In this way, the blowing position of the high pressure air by the blow pipe 18 is adjusted to the positioning guide 1.
7 in the horizontal direction, and the upper wall 16 in the vertical direction. Then, high-pressure air from the air hose 20 is supplied to the blow pipe 18 through the supply pipe 19, and the high-pressure air is blown out from the lower end of the blow pipe toward the space inside the gear gar 3. This jet of high-pressure air removes the core sand adhering to the narrow space inside the gear gar 3.
Then, the removed core sand is sucked and collected by a suction machine together with the air inside the cover body 15 through the suction duct 23, and is reliably prevented from being diffused to the outside.

The device of the above embodiment has the following effects. The core sand adhering to the narrow space inside the gear gar 3 can be easily and reliably removed by the high-pressure air blown from the blow pipe 18 in a short time. Moreover, since the removed core sand is collected by the suction machine through the suction duct 23, it does not spread outside the cover body 15, and the working environment can be kept clean.

Note that the present invention is not limited to the above embodiment. For example, it is not limited to the one for removing the core sand filled in the gear gar 3, but also the void formed in other types of gear gar 3 or the void formed without using the gear gar 3, that is, each It can be applied to remove core sand adhering to spaces between bores.

(Effects of the invention) As explained above, according to the invention, the blow pipe is accurately guided to the water hole by the positioning guide, and the position at which high-pressure air is blown out by the blow pipe is regulated in the horizontal direction by the positioning guide. Since it is regulated in the vertical direction by the position regulating part that comes into contact with a predetermined part of the cylinder block casting such as the upper wall of the cover body, it is easy to remove core sand that has adhered to the narrow spaces between each bore of the cylinder block casting. It can be removed in a short time, and the removed core sand can be collected without being spread outside the cover body, keeping the working environment clean, which has a great practical effect. .

[Brief explanation of the drawing]

FIG. 1 is an enlarged plan view showing the arrangement of the gear gar 3;
2 to 4 are views showing an embodiment of the present invention, in which FIG. 2 is a plan view of the cylinder block casting 10, FIG. 3 is a partially cutaway front view of the entire device, and FIG. The figure is a longitudinal sectional view of a cylinder block casting 10. 15...Cover body, 16...Top wall of cover body,
16'...Position regulating section, 17...Positioning guide,
18... Blow pipe, 19... Air supply pipe, 2
3...Suction duct.

Claims (1)

[Scope of utility model registration request] A cover body that covers a cylinder block casting for a multi-cylinder engine by moving from the top deck side thereof, and a cover body that is provided hanging downward from the top wall of the cover body and inserted into a hole drilled in the top deck part. A positioning guide member is provided hanging from the upper wall of the cover body, and is inserted into the water jacket through the water hole or the sand removal hole among the holes in the top deck part, and the tip is inserted into the space between each bore in the water jacket. a plurality of blow pipes for blowing out high-pressure air facing each other, an air supply pipe connected to the proximal ends of these blow pipes, one end of which is connected in communication with the cover body, and the other end is connected to a suction machine. The positioning guide member extends below the lower end of the blow pipe, and has a positioning guide member attached to the cover body for regulating the vertical position of the cover body that comes into contact with a predetermined portion of the cylinder block casting. A device for removing sand between bores of a cylinder block casting, characterized in that it is equipped with a position regulating section.