Cold Box Core Shooter Machine
Filed of the invention
The present invention relates to a cold box core making machines, more particularly, the present invention relates to cold box core shooter machine.
Background of the invention
In the existing cold box core shooter for sand shooting by air always flexible (hose) pipes are used in regular cold box core shooting machines. This leads to poor quality of cores due to damaged hose pipe.
In purging operation for amine gas carrying operation, flexible (hose) pipes are used. If the hose pipe is damaged pungent amine smell spreads in the atmosphere.
Separate Valve for low & high purging operations are provided, which requires manual setting for high & low purging pressure.
Sand Shutter plates assemblies are mounted in horizontal position, which cause sand wastage due to horizontal movement of shutter plate.
No amine storage system from pump for cold box core making machine is provided, which increases cycle time of machine.
The machine is made from regularly used channel and standard steel sections, which provides less rigidity to the machine for carrying out various operations required for core making process smoothly.

Therefore there is a need to provide a cold box core shooter process and a machine, which will overcome all the disadvantages of existing cold box core shooters.
Objects of the invention:
Object of the present invention is to provide a cold box core shooter process and machine, which has no maintenance due to non failure of flexible hose.
Another object of the present invention is to provide a cold box core shooter process and machine, which provides low purge pressure, thereby providing graduai pressure during curing of the core resulting in the uniform curing of core.
Yet another object of the present invention is to provide a cold box core shooter process and machine, which reduces sand spillage on the machine while working of sand shutter plate.
One more object of the present invention is to provide a cold box core shooter process and machine, which has bowl system for liquid amine storage in hot air generator panel box.
Further object of the present invention is to provide a cold box core shooter process and machine, which is user friendly for machine operator and also easy to maintain.
Summary of the invention
According to the present invention there is provided a process for making cold box core in a cold box core shooter machine, the process comprising steps of: mixing the sand with resin and activators in a predefined proportion;

shooting the mixed sand at high pressure in a core box on a core shooter machine;
filing the shooted in the core box thereby getting shape of the core box; and
injecting a catalyst in liquid form at room temperature in the sand filled core box in vapour form, the catalyst reaches all portions of the core box, rigid structure of the core is formed & amine is gaseous from is pushed of core box by high purge of hot air, after 3 to 4 minutes rigid structure gets formed & core box de-clamps automatically and core comes out for further process.
Brief Description of the drawings
Figure 1 shows a schematic diagram of a cold box core shooter machine in accordance with the present invention.
Figure 2 shows a left side view of the cold box core shooter machine of figure I; and
Figure 3 shows a right side view of the cold box core shooter machine of figure 1.
Detail description of the invention
The foregoing objects of the present invention are accomplished and the problems and shortcomings associated with the prior art, techniques and approaches are overcome by the present invention as described below in the preferred embodiments.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, characteristic, or function described in

connection with the embodiment is included in at least one embodiment of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.
The present invention provides a cold box core shooter machine having no maintenance due to non failure of flexible hose. Further, the machine provides low purge pressure, thereby providing gradual pressure during curing of the core resulting in the uniform curing of core. Also, the machine reduces sand spillage on the machine while working of sand shutter plate. Furthermore, the machine has bowl system for liquid amine storage in hot air generator panel box. Moreover, the machine is user friendly for machine operator and also easy to maintain.
Referring now to figure 3 shows a schematic front view of the cold box core shooter machine (herein after referred as "machine (100)") in accordance with the present invention. The machine (100) includes a Bottom Frame Assembly (1) L.H Side Column Frame Assembly (2), a R.H Side Column Frame (3), a Mandrel Assembly BKT (4), a Mandrel Assembly (5), a, End Cap for Guide Rod (6), a Flange for Guide Rod, (7), a LHS Bloster (8), a Core Removal Trolley Assembly (9), a Guide Rod for C.B. Plate (10), a RHS Bloster (11), a Guide Rod Housing for C.B. Plate (12), a Top Frame, (13), a Shooting Head (14), a Gas Magazine (15), a Rail Assembly (16), a Wheel Assembly (17), a Column Frame for Pressure Cylinder (18), a Press Cylinder Assembly BKT (19), an Air Tank BKT (20), an Air Tank (21), a Shooting System (22), a Sand Trolly Assembly (23), a Gas MAG Clamp Assembly (24), an Assembly System Assembly (25), a Sand Hopper BKT (26), a Sand Hopper (27), a Sand Hopper Lower Side BKT (28), a Sand Hopper Lower Side BKT-1 (29), and a Sand Hopper Lower Side BKT-11 (30). The improvement comprising the sand hopper (27) is tilted and the shooting system (22) is telescopic.

The present invention also provides a process for making cold box core. The process of making sand cores of different shapes and sizes where the rigid structures of prepared sand are formed after curing at room temperature. The various ingredients used for making cold box cores are 1. Sand. 2. Resin, 3. Activator, 5) Catalyst
1. Sand : - Sand of AFS no . 50 to 70 is used.
2. Resin: - Resin is phenol formaldehyde polyol resins.
3. Activator : - Activator is dimethyl/Diphenyl/Methylerediphenyl Diisocynate (M.D.I)
4. Catalyst: - Catalyst is TEA (Tri Ethyl Amine)/DMEA (Di Methyl Ethyl Amine.
The process having steps of:
Mixing the sand with resin and activators in a predefined proportion.
Shooting the mixed sand at high pressure in the core box on the core shooter machine (100).
Filing the snooted in the core box thereby getting shape of the core box.
Injecting a catalyst (TEA) which is liquid at room temperature in the sand filled core box in vapour form. When the catalyst reaches all portions of core box, rigid structure of the core is formed & amine is gaseous from is pushed of core box by high purge of hot air. After 3-4 minutes rigid structure gets formed & core box de-clamps automatically and core comes out for further process.
Advantages of the invention
1. The machine (100) and the process has no maintenance due to non failure of flexible hose.

2. The machine (100) and the process provides low purge pressure, thereby providing gradual pressure during curing of the core resulting in the uniform curing of core.
3. The machine (100) and the process reduce sand spillage on the machine while working of sand shutter plate.
4. The machine (100) and the process has bowl system for liquid amine storage in hot air generator panel box.
5. The machine (100) and the process is user friendly for machine operator and also easy to maintain.
The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the present invention and its practical application, to thereby enable others skilled in the art to best utilize the present invention and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omission and substitutions of equivalents are contemplated as circumstance may suggest or render expedient, but such are intended to cover the application or implementation without departing from the spirit or scope of the present invention.

We Claim:
1. A process for making cold box core in a cold box core shooter machine,
the process comprising steps of:
mixing the sand with resin and activators in a predefined proportion;
shooting the mixed sand at high pressure in a core box on a core shooter machine;
filing the shooted in the core box thereby getting shape of the core box; and
injecting a catalyst in liquid form at room temperature in the sand filled core box in vapour form, the catalyst reaches all portions of the core box, rigid structure of the core is formed & amine is gaseous from is pushed of core box by high purge of hot air, after 3 to 4 minutes rigid structure gets formed & core box de-clamps automatically and core comes out for further process.
2. The process as claimed in claim 1, wherein the catalyst is selected from the group consisting of Tri Ethyl Amine and Di Methyl Ethyl Amine.
3. A cold box core shooter machine comprising: a Bottom Frame Assembly (1) L.H Side Column Frame Assembly (2), a R.H Side Column Frame (3), a Mandrel Assembly BKT (4), a Mandrel Assembly (5), a, End Cap for Guide Rod (6), a Flange for Guide Rod, (7), a LHS Bloster (8), a Core Removal Trolley Assembly (9), a Guide Rod for C.B. Plate (10), a RHS Bloster (11), a Guide Rod Housing for C.B. Plate (12), a Top Frame, (13), a Shooting Head (14), a Gas Magazine (15), a Rail Assembly (16), a Wheel Assembly (17), a Column Frame for Pressure Cylinder (18), a Press Cylinder Assembly BKT (19), an Air Tank BKT (20), an Air Tank (21), a Shooting System (22), a Sand Trolly Assembly (23), a Gas MAG Clamp Assembly (24), an Assembly System Assembly (25), a Sand Hopper BKT (26), a Sand Hopper (27), a Sand Hopper Lower Side BKT (28), a Sand Hopper Lower Side BKT-1 (29), and a Sand Hopper Lower Side

BKT-11 (30), characterized in that the sand hopper (27) is tilted and the shooting system (22) is telescopic.