CA2766281A1 - A two sleeve metal filling system for filling of injection sleeve with injection piston in the retracted position for inclined cold chamber die casting machines - Google Patents
A two sleeve metal filling system for filling of injection sleeve with injection piston in the retracted position for inclined cold chamber die casting machines Download PDFInfo
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- CA2766281A1 CA2766281A1 CA 2766281 CA2766281A CA2766281A1 CA 2766281 A1 CA2766281 A1 CA 2766281A1 CA 2766281 CA2766281 CA 2766281 CA 2766281 A CA2766281 A CA 2766281A CA 2766281 A1 CA2766281 A1 CA 2766281A1
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- injection
- sleeve
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- die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2023—Nozzles or shot sleeves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
Abstract
To accommodate this two sleeve metal filling and injection system for a cold chamber die casting machine, the die clamping unit (B) and injection system of the machine must be inclined at an angle, (A), sufficient to hold enough molten metal in the injection sleeve with the die halves and platens in the open position, to produce the required casting.
The clamping unit comprises of a stationary front clamping platen (7), on to which is mounted a stationary front die (8), through which the injection sleeve (4) is mounted, a moving platen (9) on to which is mounted a rear moving die (10), and the stationary back platen (11), assembled by tie bars (12) on which the moving platen is guided.
The two sleeve metal filling and injection system comprises of a filling sleeve (1) with a filler port (1A) and a filling plunger (2), activated by the filling cylinder (3) and this unit, mounted by a bracket (13) to the machine frame (14) will be horizontally attached to a injection sleeve (4), at a point immediately in front of the retracted position (C), of the injection plunger (5), which is activated by the injection cylinder (6). The filler and injection sleeves and filler plunger and injection plungers will be manufactured to accommodate the metals being cast. Adequate plunger lubrication will be applied, either by injecting lubricating media into the filler port, or by lubrication of the piston through the respective sleeves.
For this process to be effective, the inclination (A) of the centre line of the clamping mechanism and injection system could be as low as 15 degrees, to a maximum of 90 degrees from horizontal, but the most practical range will be from 15 degrees to approximately 45 degrees. 30 degrees will be a practical angle to work with.
The centre line of the injection sleeve, is parallel to and in line with the centre line of the die casting machine clamping mechanism, (B) or could be below the centre line of the clamping mechanism, as is common on most manufactured cold chamber die casting machines.
The clamping unit comprises of a stationary front clamping platen (7), on to which is mounted a stationary front die (8), through which the injection sleeve (4) is mounted, a moving platen (9) on to which is mounted a rear moving die (10), and the stationary back platen (11), assembled by tie bars (12) on which the moving platen is guided.
The two sleeve metal filling and injection system comprises of a filling sleeve (1) with a filler port (1A) and a filling plunger (2), activated by the filling cylinder (3) and this unit, mounted by a bracket (13) to the machine frame (14) will be horizontally attached to a injection sleeve (4), at a point immediately in front of the retracted position (C), of the injection plunger (5), which is activated by the injection cylinder (6). The filler and injection sleeves and filler plunger and injection plungers will be manufactured to accommodate the metals being cast. Adequate plunger lubrication will be applied, either by injecting lubricating media into the filler port, or by lubrication of the piston through the respective sleeves.
For this process to be effective, the inclination (A) of the centre line of the clamping mechanism and injection system could be as low as 15 degrees, to a maximum of 90 degrees from horizontal, but the most practical range will be from 15 degrees to approximately 45 degrees. 30 degrees will be a practical angle to work with.
The centre line of the injection sleeve, is parallel to and in line with the centre line of the die casting machine clamping mechanism, (B) or could be below the centre line of the clamping mechanism, as is common on most manufactured cold chamber die casting machines.
Description
Description:
The invention is a 2 sleeve metal filling system, with the injection plunger in the retracted position, for a cold chamber die casting machine which has the die clamping mechanism and injection system inclined at an angle sufficient to hold the molten required to produce the required casting in the injection sleeve with the die halves and platens in the open position.
The two sleeve metal filling and injection system comprises of a filling sleeve (1) with a filling port (1A) and a filling plunger (2), activated by the filling cylinder (3) which will be horizontal, or at a slightly declining angle, to allow metal to partially flow into the injection sleeve by gravity, and an injection sleeve (4) and an injection plunger (5), activated by the injection cylinder (6) which are at an inclined plane.
When metal is required, either at the start of the initial cycle, or during the the normal production cycle, with the injection and filling plungers in the retracted position, the metered amount of metal will be poured into the filling sleeve port (1A) by means of a mechanical or hand operated ladle.
The filling plunger will then be activated to move forward at a controlled speed to the end position. This end position will be measured so that at the end of the stroke of the filling cylinder, the filling plunger will not be in the path of the injection plunger, but at the same time will leave a minimum of metal remaining at the end of the filling sleeve.
When the filling plunger has reached the end position, all of the metal would have been pushed into the injection sleeve to fill the sleeve to level (D).
The injection plunger will be pushed by the injection cylinder so that it will proceed at a controlled speed to a set position. This position will be established as the most forward position which will not cause metal to pour out from the open end of the injection sleeve (E). The injection plunger will be stopped and held in this position until the die is fully closed, and vacuum, if used has been activated, and the signals for the shot to proceed has been activated. When the shot is activated, with the machine closed and safely locked, the plunger will be advanced at the programmed speed and pressures, and this pressure will be applied until the machine starts to open and the die halves part and the gates and runners and the part known as the biscuit is ejected from the injection sleeve.
The filling plunger and the injection plunger will immediately retract to the home position and be refilled to start a new cycle and advance to the shot ready position, ready for the die to go through the extract, die cool and die spray and close process. The shot will be ready to advance as soon as the die closes and will save considerable cycle time.
Research The following patents have been researched:
1) Patent CA 2083082:
This patent describes an injection unit for a cold chamber. The injection unit is inclined at an angle of 45 degrees, and is a top fill system which can be filled with the machine in the open position. The platens of this machine opens horizontally, which means that each die which is made for this machine will not be interchangeable with dies made for the conventional horizontal machine with a horizontal injection system.
The invention is a 2 sleeve metal filling system, with the injection plunger in the retracted position, for a cold chamber die casting machine which has the die clamping mechanism and injection system inclined at an angle sufficient to hold the molten required to produce the required casting in the injection sleeve with the die halves and platens in the open position.
The two sleeve metal filling and injection system comprises of a filling sleeve (1) with a filling port (1A) and a filling plunger (2), activated by the filling cylinder (3) which will be horizontal, or at a slightly declining angle, to allow metal to partially flow into the injection sleeve by gravity, and an injection sleeve (4) and an injection plunger (5), activated by the injection cylinder (6) which are at an inclined plane.
When metal is required, either at the start of the initial cycle, or during the the normal production cycle, with the injection and filling plungers in the retracted position, the metered amount of metal will be poured into the filling sleeve port (1A) by means of a mechanical or hand operated ladle.
The filling plunger will then be activated to move forward at a controlled speed to the end position. This end position will be measured so that at the end of the stroke of the filling cylinder, the filling plunger will not be in the path of the injection plunger, but at the same time will leave a minimum of metal remaining at the end of the filling sleeve.
When the filling plunger has reached the end position, all of the metal would have been pushed into the injection sleeve to fill the sleeve to level (D).
The injection plunger will be pushed by the injection cylinder so that it will proceed at a controlled speed to a set position. This position will be established as the most forward position which will not cause metal to pour out from the open end of the injection sleeve (E). The injection plunger will be stopped and held in this position until the die is fully closed, and vacuum, if used has been activated, and the signals for the shot to proceed has been activated. When the shot is activated, with the machine closed and safely locked, the plunger will be advanced at the programmed speed and pressures, and this pressure will be applied until the machine starts to open and the die halves part and the gates and runners and the part known as the biscuit is ejected from the injection sleeve.
The filling plunger and the injection plunger will immediately retract to the home position and be refilled to start a new cycle and advance to the shot ready position, ready for the die to go through the extract, die cool and die spray and close process. The shot will be ready to advance as soon as the die closes and will save considerable cycle time.
Research The following patents have been researched:
1) Patent CA 2083082:
This patent describes an injection unit for a cold chamber. The injection unit is inclined at an angle of 45 degrees, and is a top fill system which can be filled with the machine in the open position. The platens of this machine opens horizontally, which means that each die which is made for this machine will not be interchangeable with dies made for the conventional horizontal machine with a horizontal injection system.
2) Toshiba Machine : the new LEOMACS system:
This system comprises of a vertical injection, with an electromagnetic pump which pumps a measured amount of metal into the injection sleeve with the injection plunger in the retracted position.
This system comprises of a vertical injection, with an electromagnetic pump which pumps a measured amount of metal into the injection sleeve with the injection plunger in the retracted position.
3) U.S. Patent 4006774:
This patent describes a vertical injection system on a machine with the platens opening vertically and claims that there will be no contact of metal with the injection sleeve, as metal will be pourec into a cup shape face of the vertical plunger.
This patent describes a vertical injection system on a machine with the platens opening vertically and claims that there will be no contact of metal with the injection sleeve, as metal will be pourec into a cup shape face of the vertical plunger.
4) U.S. Patent 3208113:
This patent describes an inclined injection sleeve with a metal filling port in the position in front of the retracted piston. The injection sleeve enters the stationary platen and stationary die at an inclined angle, and the machine platens are on a horizontal plane, which could cause a conflict as the machine platens open.
A review of current popular and commonly used cold chamber Casting machine injection systems and their advantages and disadvantages.
SKETCH 1 (Fig.2) Horizontal Cold Chamber Machine.
The majority of Cold Chamber Die Cast machines in use and in the market today are of the horizontal design where the machine and clamp system is designed and built in the horizontal plane with the injection on the horizontal plane. This has been the accepted design form ever since cold chamber machines were manufactured.
The advantages of this design are as follows.
a) This is currently the most common Cold Chamber system used, and as a result there is familiarity with it, and a comfort zone. Most Die casting companies are competing at the same level, and will not be concerned until a better system comes along.
b) Installation of dies on the horizontal plane is fairly easy to accommodate, and the installation of ancillary equipment is easy to accommodate, and is available, again due to the fact that there is familiarity.
The disadvantages of this design are as follows.
a) The fact that the metal is poured in a horizontal sleeve, and there is a large volume of air and gases in the sleeve which become entrapped in the metal when injection takes place, causing porosity in the casting, and rejects and poor quality of product. Molten aluminium also has a high surface tension quality, and as a result, it is more difficult to expel any entrapped air or gases. This will result in requiring more pressure at faster fill times and higher speeds to compress any entrapped gases to reduce porosity. This higher pressure at higher speeds will result in more turbulent flow of metal and will cause die wear and machine wear and ultimately higher costs and less efficiency.
b) The high surface area of molten metal contact to the colder shot sleeve causes the metal to chill, and as a result, the metal being injected has a high percentage of sludge and solids, and is not in the molten state which we often assume. The result again is that higher pressures are required to inject this material and this causes additional wear and tear.
c) The injection sleeve on this conventional type of machine is in the horizontal position, and as a result, molten metal can be poured into the sleeve only after the machine is fully closed and locked, resulting in loss of significant production time.
d) If a Vacuum system is used, then the shot plunger will have to be advanced past the filling port and stopped for the vacuum to be applied and to be effective causing a loss of production time and efficiency.
SKETCH 2 (Fig.2) Uni-Cast 45 Degree Injection Design (Canadian Patent CA 2083082. US Patent 5787962). This machine is a horizontal die casting machine, and the injection system comes in from the lower part of the front platen at an angle inclined at 45 degrees.
This patent covers the idea that the injection of the metal is at a softer angle of 45 degrees rather than the more drastic direction change of 90 degrees, and the pouring of the metal into the sleeve is from the open, top end of the sleeve when the die faces and machine platens are in the open position.
The advantages of this design are as follows.
a) The inclined angle of the shot sleeve at 45 degrees is an advantage since this will assure that most of the gases in the shot sleeve will be pushed out through the sleeve, and through the gates and runners ahead of the molten metal and be vented from the die with minimal inclusion into the casting, resulting in less porosity and gas entrapment.
b) If Vacuum is used on the die, then vacuum can be applied as soon as the die surfaces are closed and the machine is fully locked, thus saving time as compared to the horizontal type of machine.
c) The shot sleeve can only be filled with the machine in the open position.
This can be an advantage of reducing cycle time as compared to the conventional horizontal die casting machine, which requires that the die faces are closed and locked before metal can be filled into the shot sleeve.
The disadvantages of this design are as follows.
a) The design of the shot sleeve entering the front stationary die at 45 degrees will be a disadvantage as this will mean that any die which is made for this machine will only fit in this type of machine, and will not be able to be interchangeable with any other conventional machine without major modifications, and significant costs. There are no machines commercially available with this design at this time.
b) The injection sleeve at 45 degrees from the die opening stroke could cause interference on the opening stroke if there is excess metal in the sleeve.
c) Dies made for the any machine with the injection sleeve at 90 degrees from the parting line, as most dies are currently made, will not fit on a machine with the injection system at 45 degrees from the parting line, and as a result, it will be difficult for industry to accept this type of injection system.
d) The cost to make tooling to be able to use this system will be significantly higher than for conventional systems.
e) The filling can only be done with the machine in the open position would mean that there will be another piece of machinery for ladling the metal, interfering with the die open area along with a parts extractor, and die sprayer which all will have to come between the die faces on each cycle. This will make it more difficult for die setups and maintenance, and also could possibly extend cycle times.
SKETCH 3 (Fig.2) Horizontal Platen, Vertical Injection Die Casting Machine:
Hand or Mechanized Ladle (A), or Electromagnetically pumped into sleeve (B).
This design of machine is one in which the clamping mechanism is on the horizontal plane, and the Injection system is vertical at the Parting line from the underside of the die. The molten metal is either poured manually or by means of a mechanical ladle into the top of the shot sleeve, or by means of an electromagnetic pump.
The advantages of this design are as follows.
a) Positive displacement of air and gases when the metal is injected into the die, resulting in less porosity in the product The disadvantages of this design are as follows.
a) Dies made for these designs of machines will not fit conventional horizontal machines.
b) For the top fill ladle system, the fact that the filling can only be done with the machine in the open position would mean that there will be another piece of machinery for ladling the metal, with the furnace for the metal interfering with the die open area along with a parts extractor, and die sprayer which all will have to come between the die faces on each cycle. This will make it more difficult for die setups and maintenance.
SKETCH 4 (Fig.2) Vertical Platen, Vertical injection using siphon metal filling system. (A) or ladled with the machin platens in the open position.
The design of this machine is one in which the platen assembly is in the vertical position, and the injection system is also vertical.
Metal is siphoned directly from the furnace into the shot sleeve, due to vacuum being applied to the die cavity. Metal can also be top filled into the sleeve with a manual or mechanized ladle with the machine platens and die in the open position.
The advantages of this design are as follows.
a) Positive displacement of air and gases when the metal is injected into the die, resulting in less porosity in the product b) The configuration of this design makes it ideal for products which require inserts to be loaded into the die to be cast into the product.
The disadvantages of this design are as follows.
a) One of the issues with this design was the inconsistency of the amount of metal charged into the die when the siphon system was used.
Drawing Detail Information. DWG. FIG 1 A Angle of Incline required for the process.
B Die Cast Machine Clamping assembly.
C Location of where the feeder sleeve is attached to the injection sleeve.
D Metal Level when metal is injected into injection sleeve.
E Metal level when injection plunger is advanced to safe position, with machine open or closed.
Fig 1 Representative drawing showing 3 views of assembly Fig. 2 Existing Casting system sketches 1 Filler Sleeve 1A Filler Sleeve Port 2 Filler Plunger 3 Filler Cylinder 4 Injection Sleeve Injection Plunger 6 Injection Cylinder 7 Front Stationary Platen 8 Front Stationary Die 9 Rear Moving Platen Rear Moving Die 11 Rear stationary Platen 12 Tie Bars 13 Mounting Bracket for Metal Filler System 14 Machine frame
This patent describes an inclined injection sleeve with a metal filling port in the position in front of the retracted piston. The injection sleeve enters the stationary platen and stationary die at an inclined angle, and the machine platens are on a horizontal plane, which could cause a conflict as the machine platens open.
A review of current popular and commonly used cold chamber Casting machine injection systems and their advantages and disadvantages.
SKETCH 1 (Fig.2) Horizontal Cold Chamber Machine.
The majority of Cold Chamber Die Cast machines in use and in the market today are of the horizontal design where the machine and clamp system is designed and built in the horizontal plane with the injection on the horizontal plane. This has been the accepted design form ever since cold chamber machines were manufactured.
The advantages of this design are as follows.
a) This is currently the most common Cold Chamber system used, and as a result there is familiarity with it, and a comfort zone. Most Die casting companies are competing at the same level, and will not be concerned until a better system comes along.
b) Installation of dies on the horizontal plane is fairly easy to accommodate, and the installation of ancillary equipment is easy to accommodate, and is available, again due to the fact that there is familiarity.
The disadvantages of this design are as follows.
a) The fact that the metal is poured in a horizontal sleeve, and there is a large volume of air and gases in the sleeve which become entrapped in the metal when injection takes place, causing porosity in the casting, and rejects and poor quality of product. Molten aluminium also has a high surface tension quality, and as a result, it is more difficult to expel any entrapped air or gases. This will result in requiring more pressure at faster fill times and higher speeds to compress any entrapped gases to reduce porosity. This higher pressure at higher speeds will result in more turbulent flow of metal and will cause die wear and machine wear and ultimately higher costs and less efficiency.
b) The high surface area of molten metal contact to the colder shot sleeve causes the metal to chill, and as a result, the metal being injected has a high percentage of sludge and solids, and is not in the molten state which we often assume. The result again is that higher pressures are required to inject this material and this causes additional wear and tear.
c) The injection sleeve on this conventional type of machine is in the horizontal position, and as a result, molten metal can be poured into the sleeve only after the machine is fully closed and locked, resulting in loss of significant production time.
d) If a Vacuum system is used, then the shot plunger will have to be advanced past the filling port and stopped for the vacuum to be applied and to be effective causing a loss of production time and efficiency.
SKETCH 2 (Fig.2) Uni-Cast 45 Degree Injection Design (Canadian Patent CA 2083082. US Patent 5787962). This machine is a horizontal die casting machine, and the injection system comes in from the lower part of the front platen at an angle inclined at 45 degrees.
This patent covers the idea that the injection of the metal is at a softer angle of 45 degrees rather than the more drastic direction change of 90 degrees, and the pouring of the metal into the sleeve is from the open, top end of the sleeve when the die faces and machine platens are in the open position.
The advantages of this design are as follows.
a) The inclined angle of the shot sleeve at 45 degrees is an advantage since this will assure that most of the gases in the shot sleeve will be pushed out through the sleeve, and through the gates and runners ahead of the molten metal and be vented from the die with minimal inclusion into the casting, resulting in less porosity and gas entrapment.
b) If Vacuum is used on the die, then vacuum can be applied as soon as the die surfaces are closed and the machine is fully locked, thus saving time as compared to the horizontal type of machine.
c) The shot sleeve can only be filled with the machine in the open position.
This can be an advantage of reducing cycle time as compared to the conventional horizontal die casting machine, which requires that the die faces are closed and locked before metal can be filled into the shot sleeve.
The disadvantages of this design are as follows.
a) The design of the shot sleeve entering the front stationary die at 45 degrees will be a disadvantage as this will mean that any die which is made for this machine will only fit in this type of machine, and will not be able to be interchangeable with any other conventional machine without major modifications, and significant costs. There are no machines commercially available with this design at this time.
b) The injection sleeve at 45 degrees from the die opening stroke could cause interference on the opening stroke if there is excess metal in the sleeve.
c) Dies made for the any machine with the injection sleeve at 90 degrees from the parting line, as most dies are currently made, will not fit on a machine with the injection system at 45 degrees from the parting line, and as a result, it will be difficult for industry to accept this type of injection system.
d) The cost to make tooling to be able to use this system will be significantly higher than for conventional systems.
e) The filling can only be done with the machine in the open position would mean that there will be another piece of machinery for ladling the metal, interfering with the die open area along with a parts extractor, and die sprayer which all will have to come between the die faces on each cycle. This will make it more difficult for die setups and maintenance, and also could possibly extend cycle times.
SKETCH 3 (Fig.2) Horizontal Platen, Vertical Injection Die Casting Machine:
Hand or Mechanized Ladle (A), or Electromagnetically pumped into sleeve (B).
This design of machine is one in which the clamping mechanism is on the horizontal plane, and the Injection system is vertical at the Parting line from the underside of the die. The molten metal is either poured manually or by means of a mechanical ladle into the top of the shot sleeve, or by means of an electromagnetic pump.
The advantages of this design are as follows.
a) Positive displacement of air and gases when the metal is injected into the die, resulting in less porosity in the product The disadvantages of this design are as follows.
a) Dies made for these designs of machines will not fit conventional horizontal machines.
b) For the top fill ladle system, the fact that the filling can only be done with the machine in the open position would mean that there will be another piece of machinery for ladling the metal, with the furnace for the metal interfering with the die open area along with a parts extractor, and die sprayer which all will have to come between the die faces on each cycle. This will make it more difficult for die setups and maintenance.
SKETCH 4 (Fig.2) Vertical Platen, Vertical injection using siphon metal filling system. (A) or ladled with the machin platens in the open position.
The design of this machine is one in which the platen assembly is in the vertical position, and the injection system is also vertical.
Metal is siphoned directly from the furnace into the shot sleeve, due to vacuum being applied to the die cavity. Metal can also be top filled into the sleeve with a manual or mechanized ladle with the machine platens and die in the open position.
The advantages of this design are as follows.
a) Positive displacement of air and gases when the metal is injected into the die, resulting in less porosity in the product b) The configuration of this design makes it ideal for products which require inserts to be loaded into the die to be cast into the product.
The disadvantages of this design are as follows.
a) One of the issues with this design was the inconsistency of the amount of metal charged into the die when the siphon system was used.
Drawing Detail Information. DWG. FIG 1 A Angle of Incline required for the process.
B Die Cast Machine Clamping assembly.
C Location of where the feeder sleeve is attached to the injection sleeve.
D Metal Level when metal is injected into injection sleeve.
E Metal level when injection plunger is advanced to safe position, with machine open or closed.
Fig 1 Representative drawing showing 3 views of assembly Fig. 2 Existing Casting system sketches 1 Filler Sleeve 1A Filler Sleeve Port 2 Filler Plunger 3 Filler Cylinder 4 Injection Sleeve Injection Plunger 6 Injection Cylinder 7 Front Stationary Platen 8 Front Stationary Die 9 Rear Moving Platen Rear Moving Die 11 Rear stationary Platen 12 Tie Bars 13 Mounting Bracket for Metal Filler System 14 Machine frame
Claims (8)
1) A method of filling the injection sleeve in the plunger retracted position on a cold chamber die casting machine. This system is to be used on a machine which is in the inclined position, or which has the clamping mechanism and the injection system in the inclined position (A). The purpose for having the machine on an inclined position is to assure that during the injection process all of the air and gases in the injection sleeve precedes the metal out of the sleeve. The angle of the incline will be such that when metal is charged from the filling sleeve into the injection sleeve, the metal will not spill out from the open end of the injection sleeve, if the die faces are in the open position (D) (E). It will not be difficult to modify existing horizontal machines to create the required incline, or adjust the clamping mechanism as per Fig 1.
2) The feeder sleeve assembly system attached to the injection cylinder, just above the injection piston in the retracted position (C), together with the machine inclined at a sufficient angle (A), (approximately 15 degrees to 45 degrees, but it appears that 30 degrees will be most practical), will allow the injection sleeve to be filled to the required level (D), and the piston advanced in a controlled method, to a safe point (E) just before the point at which the metal will flow out from the injection sleeve (4).
The filling and advancing of the injection sleeve can be done at any time whether the die faces are open or closed, and as a result there will be no interference with cycle time, or with other auxiliary equipment such as extractors or sprayers or operators, if this inclined sleeve were to be filled from the open end with the machine faces opened, and will save considerable production and cycle time.
The filling and advancing of the injection sleeve can be done at any time whether the die faces are open or closed, and as a result there will be no interference with cycle time, or with other auxiliary equipment such as extractors or sprayers or operators, if this inclined sleeve were to be filled from the open end with the machine faces opened, and will save considerable production and cycle time.
3) The inclined angle of injection will reduce turbulent flow of metal in the injection sleeve, and will create a smooth flow of metal in the injection sleeve, runners and gates as there will be less entrapment of air and gases in the molten metal through the injection cycle. Porosity and poor fill due to turbulence and air entrapment are the major causes of casting reject, and die and machine wear, as extra production is required using higher speeds and forces, which cause higher costs. This method of injection will significantly reduce cost and improve quality.
4) The metal can be charged with the machine in the open position and there will be no delay as in conventional horizontal die casting machines which can only charge metal when the machine is in the closed position.
5) If used, the vacuum system can be applied as soon as the machine is locked, and there will be no need to wait for the metal pour and advancement of the plunger passed the pour hole as in a horizontal machine, so additional cycle time is saved.
6) When the shot is activated, the injection plunger (5) will be advanced at programmed speeds and pressures to inject metal into the die to fill the cavity of the parts being produced. When the machine starts to open and the injection plunger reaches the set extention point it will return to the retract position. The filler plunger will also return to its retracted position. Metal will be charged into the pour port (1A) of the filler sleeve (1), and the cycle will start again.
7) Other inclined injection systems exist, (CA2083082). This system is a top fill inclined system which enters the die at 45 degrees, and is made for a horizontal clamping machine. This machine is not commercially available, and dies made for this machine cannot be interchanged or used on conventional horizontal machines, or vice versa, and will have a cost premium. Because it is top filled, it can only be charged with metal when the machine is in the open position, and charging the metal in the machine open position which creates cycle time and safety issues.
8) The two sleeve filling and injection system can be fitted to most horizontal machine which can be modified to be inclined, and as a result will be able to be used with most existing dies.
to 45 degrees to allow for the filling of the injection sleeve while the machine is still in the open state saving production cycle time.
This system when the injection is initiated, will allow metal to flow smoothly up the inclined injection sleeve, with the air and gases being pushed out of the sleeve and runners and gate before the metal, and accordingly, reducing the amount of gases being entrapped in the casting, resulting in better quality, lower product, tooling and maintenance costs, as the system will not have to be overpowered to reduce the effects of entrapped gases.
This system could be used with most existing die cast tooling used for the horizontal die cast process as long as the die cast machine could be modified to have an inclined injection.
Claims Appendix A:
Review of Currently Accepted Injection Systems
to 45 degrees to allow for the filling of the injection sleeve while the machine is still in the open state saving production cycle time.
This system when the injection is initiated, will allow metal to flow smoothly up the inclined injection sleeve, with the air and gases being pushed out of the sleeve and runners and gate before the metal, and accordingly, reducing the amount of gases being entrapped in the casting, resulting in better quality, lower product, tooling and maintenance costs, as the system will not have to be overpowered to reduce the effects of entrapped gases.
This system could be used with most existing die cast tooling used for the horizontal die cast process as long as the die cast machine could be modified to have an inclined injection.
Claims Appendix A:
Review of Currently Accepted Injection Systems
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2766281 CA2766281A1 (en) | 2012-01-26 | 2012-01-26 | A two sleeve metal filling system for filling of injection sleeve with injection piston in the retracted position for inclined cold chamber die casting machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2766281 CA2766281A1 (en) | 2012-01-26 | 2012-01-26 | A two sleeve metal filling system for filling of injection sleeve with injection piston in the retracted position for inclined cold chamber die casting machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2766281A1 true CA2766281A1 (en) | 2013-07-26 |
Family
ID=48868723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2766281 Abandoned CA2766281A1 (en) | 2012-01-26 | 2012-01-26 | A two sleeve metal filling system for filling of injection sleeve with injection piston in the retracted position for inclined cold chamber die casting machines |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2766281A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978180A (en) * | 2014-06-04 | 2014-08-13 | 宁波中桥精密机械有限公司 | Air entrainment prevention aluminum alloy cold chamber die casting machine |
| CN103978182A (en) * | 2014-06-04 | 2014-08-13 | 宁波中桥精密机械有限公司 | Air entrapment prevention leak-proof material tube assembly of cold chamber die-casting machine |
| WO2017068665A1 (en) * | 2015-10-21 | 2017-04-27 | ティファ（タイランド） カンパニー リミテッド | Injection casting device and melt supply method in said device |
-
2012
- 2012-01-26 CA CA 2766281 patent/CA2766281A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978180A (en) * | 2014-06-04 | 2014-08-13 | 宁波中桥精密机械有限公司 | Air entrainment prevention aluminum alloy cold chamber die casting machine |
| CN103978182A (en) * | 2014-06-04 | 2014-08-13 | 宁波中桥精密机械有限公司 | Air entrapment prevention leak-proof material tube assembly of cold chamber die-casting machine |
| WO2017068665A1 (en) * | 2015-10-21 | 2017-04-27 | ティファ（タイランド） カンパニー リミテッド | Injection casting device and melt supply method in said device |
| JPWO2017068665A1 (en) * | 2015-10-21 | 2018-04-26 | ティファ（タイランド） カンパニー リミテッド | Injection casting apparatus and hot water supply method in the apparatus |
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