Field of the Invention

The present invention relates to a non-clogging nozzle, which takes on the task of filling the sand and binding chemicals by taking them into the shooterafter they are mixed in the mixer and transfering them into the core box with air pressure in the core production process where silica sand and other artificial sand are used in casting factories.

It provides an increase in energy performance and provides an efficient production process by preventing machine downtime due to the clogged nozzle tip with the help of the present invention.

Prior Art

Cores are auxiliary mold elements which are used in the casting process and used to obtain opposite angled surfaces with the help of the spaces in the part that cannot be formed during the molding phase. Hot box core production method is preferred in the production of cores with thin wall thickness such as water channels that require high strength.

The water coming from the water line to the nozzle water reservoir cannot effectively reach the surface that contacts the hot plate with the current nozzles. The nozzle water tank is open to the water line. For this reason, the water cannot follow the water line and fill the nozzle water tank effectively. Furthermore, the nozzle tip cannot be cooled effectively since the nozzle contact surface is not exposed to the flow of a homogeneous coolant.

In the core production process where silica sand and other artificial sand are used; sand and binder chemicals are mixed in the mixer, then, it is taken into the sand shooter and filled with air pressure between 2-6 bars by shooting from the nozzles into the core box. The production process is carried out at 140-200°C for 100-200 seconds according to the geometry of the core in the box. In case the nozzles in contact with the plate cannot be cooled sufficiently, in particular high temperature values are reached at the nozzle tips, the nozzles are blocked and sand cannot be shooted into the core box. In case nozzle tip clogs, this leads to machine downtimes and in this case, production-related problems are experienced. The existing nozzles are insufficient in terms of functionality due to the aforementioned reasons.

Description of the Invention

Non-clogging nozzle that is realized to fulfi lithe aims of the present invention is shown in the figures.

In these figures;

Figure-1 is a front view of the inventive non-clogging nozzle.

Figure-2 is a front view of the longitudinal section of the inventive non-clogging nozzle.

Figure-3 is the front view of the outer sleeve of the liquid chamber of the inventive nonclogging nozzle.

Figure-4 is the front view of the longitudinal cross-section of the outer sleeve of the liquid chamber of the inventive non-clogging nozzle.

Figure-5 is the front view of the shooter inner sleeve of the inventive non-clogging nozzle.

Figure-6 is the front view of the longitudinal cross-section of the shooter inner sleeve of the inventive non-clogging nozzle.

The parts that constitute the inventive non-clogging nozzle are enumerated as follows in the attached figures:

1- Non-clogging nozzle

2- Sand shooter Inner Sleeve

2.1- Viton Rubber Gasket

3- Liquid Chamber Outer Sleeve

3.1- Gasket Surface 3.2- Fluid Inlet Hole

3.3- Fluid Outlet Hole

3.4- Key Blade

The inventive non-clogging nozzle (1) comprises of the following;

Shooter inner sleeve (2), which has a viton rubber gasket (2.1) that provides heat insulation at the end, and which allows the core sand to be ejected by pressure,

Liquid chamber outer sleeve (3) having gasket surface (3.1), which provides liquid tightness, liquid inlet hole (3.2) through which the coolant enters, which functions to cool the non-clogging nozzle (1) and a liquid outlet hole (3.3), from which the coolant exits after reaching the entire body, key blade (3.4) for mounting and tightening the non-clogging nozzle (1).

The inventive non-clogging nozzle (1) takes on the task of filling the sand and binding chemicals by taking them into the shooter after they are mixed in the mixer and spraying them into the core box with air pressure in the core production process where silica sand and artificial sand are used in casting factories.

The temperature values in the body of the non-clogging nozzle (1) is reduced with the help ofthe improvement of the coolant flow by means of the fluid inlet hole (3.2) and the fluid outlet hole (3.3) of the outer casing of the fluid chamber (3), and with the help of the increase of the thermal resistance in that area by insulating the end of the inner sleeve of the shooter (2) with a viton rubber gasket (2.1). Therefore, existing blockages can be prevented as the coolant circulates more effectively in the non-clogging nozzle (1), increasing the heat transfer.

Temperature control is also performed in the inventive non-clogging nozzle (1) and the coolant also performs the cooling process at a variable flow rate. Simultaneously, control is provided in the system by measuring the differential pressure on the coolant side. A new structure that can provide cooling heat flux equally to all parts of the inventive nonclogging nozzle (1) ensures homogeneity in terms of nozzle (1) temperatures, and can prevent possible blockages is revealed. It is possible to prevent especially nozzle (1) tip blockages by directing the coolant liquid up to the nozzle (1) tip with the coolant liquid flow structure. Thus, efficiency is ensured in production in casting technology. At the same time, the service life of the nozzle (1) is extended due to the fact that there is no obstruction at the nozzle (1) tip, there is no interference with the nozzle (1) tip and the nozzle (1) operates at a stable temperature. Energy is provided by reducing the thermal bridge to the tip of the nozzle (1), reducing the heat increase in the nozzle (1), thus reducing the cooling load. Significant energy savings are achieved as the coolant used in the cooling of the nozzle (1) can also perform the cooling process at variable flow rate with temperature control.