Injection mold having pre-heating device, the pre-heating device, and method for pre-heating injection mold

• US 20110140310A1
• Filed: 06/24/2010
• Published: 06/16/2011
• Est. Priority Date: 12/10/2009
• Status: Active Grant

• Current Assignee: Quanta Computer
• Original Assignee: Quanta Computer
• Inventors: Lin, Shu-Chen
• Granted Patent: US 8,272,864 B2
• Time in Patent Office: Days
• US Class Current: 264/403
• CPC Class Codes: B29C 2035/0811 using induction
• CPC Class Codes: B29C 33/06 using radiation , e.g. electro-magnetic waves, induction heating
• CPC Class Codes: B29C 45/73 of the mould B29C45/2642 and B29C45/2737 take precedence

Abstract

An injection mold having pre-heating device, the pre-heating device, and method for pre-heating injection mold are provided. The pre-heating device includes a high frequency coil member and a transportation device having a Z axle servo motor, a Z axle linear sliding rail, an annular transportation belt and a lifting rack. The annular transportation belt is driven by the Z axle servo motor. The high frequency coil member is hung on the lifting rack. The lifting rack is moveably connected to the Z axle linear sliding rail, coupled to the annular transportation belt and is driven by the annular transportation belt to perform an ascent or descent movement along the Z axle linear sliding rail.

Claims

1. An injection mold having pre-heating device, comprising:

a male die;

a female die; and

a pre-heating device comprising;

a high frequency coil member for introducing electromagnetic induction; and

a transportation device, comprising;

a fixed rack having a Z axle servo motor, a first Z axle linear sliding rail and an annular transportation belt connected to the Z axle servo motor so as to be driven by the operation of the Z axle servo motor; and

a lifting rack hanging the high frequency coil member with one end thereof, and having a second Z axle linear sliding rail coupled to the annular transportation belt and moveably connected to the first Z axle linear sliding rail with the other end thereof;

wherein when the Z axle servo motor drives the annular transportation belt to operate, the lifting rack is driven by the annular transportation belt to perform an ascent or descent movement along the first Z axle linear sliding rail so as to be moved into or out from a space between the male die and the female die.

2. The injection mold having pre-heating device as claimed in claim 1, wherein

the Z axle servo motor further comprises a transmission shaft;

the annular transportation belt further comprises;

a plurality of transportation wheels, one of the transportation wheels is engaged with the transmission shaft; and

a synchronization belt coupled to the second Z axle linear sliding rail and installed on the transportation wheels.

3. The injection mold having pre-heating device as claimed in claim 1, wherein the lifting rack further comprises:

a rack member;

an X axle servo motor disposed at one side of the rack member and having an X axle ball screw; and

a horizontal moving rack moveably installed on the X axle ball screw and served to hang the high frequency coil member.

4. The injection mold having pre-heating device as claimed in claim 1, wherein the lifting rack further comprises:

a rack member;

an X axle servo motor disposed at one side of the rack member and having an X axle ball screw;

a Y axle servo motor having a Y axle ball screw and a connection member moveably installed on the X axle ball screw; and

a horizontal moving rack moveably installed on the Y axle ball screw and served to hang the high frequency coil member.

5. The injection mold having pre-heating device as claimed in claim 1, wherein the pre-heating device is disposed at a upper end of the male die or the female die.

6. A pre-heating device of injection mold implemented for pre-heating surfaces of a male die and a female die, comprising:

a transportation device, comprising;

a fixed rack; and

a Z axle servo motor installed on the fixed rack;

a first Z axle linear sliding rail installed on the fixed rack;

an annular transportation belt connected to the Z axle servo motor and driven by the operation of the Z axle servo motor; and

a lifting rack having a second Z axle linear sliding rail coupled to the annular transportation belt and moveably connected to the first Z axle linear sliding rail for being driven by the operation of the annular transportation belt to perform an ascent or descent movement along the Z axle linear sliding rail; and

a high frequency coil member hung on the lifting rack for introducing electromagnetic induction on the surface of the male die or the female die when the high frequency coil member is descended to a position between the male die and the female die.

7. The pre-heating device of injection mold as claimed in claim 6, wherein the Z axle servo motor further comprises a transmission shaft;

the annular transportation belt further comprises;

a plurality of transportation wheels, wherein one of the transportation wheels is engaged with the transmission shaft; and

a synchronization belt coupled to the lifting rack and installed on the transportation wheels.

8. The pre-heating device of injection mold as claimed in claim 6, wherein the lifting rack further comprises:

a rack member;

an X axle servo motor disposed at one side of the rack member and having an X axle ball screw; and

a horizontal moving rack moveably installed on the X axle ball screw and served to hang the high frequency coil member.

9. The pre-heating device of injection mold as claimed in claim 6, wherein the lifting rack further comprises:

a rack member;

an X axle servo motor disposed at one side of the rack member and having an X axle ball screw;

a Y axle servo motor having a connection member moveably installed on the X axle ball screw, and a Y axle ball screw installed on the connection member; and

a horizontal moving rack moveably installed on the Y axle ball screw and served to hang the high frequency coil member.

10. A method for pre-heating injection mold implemented on a pre-heating device of injection mold, the method comprising:

separating a male die and a female die;

linearly moving a high frequency coil member along a vertical direction, between the male die and the female die, and facing a die cavity of the female die;

linearly moving the high frequency coil member along a horizontal direction, close the surface of the die cavity of the female die; and

introducing electromagnetic induction by the high frequency coil member on the surface of the die cavity for heating the die cavity.

11. The method for pre-heating injection mold as claimed in claim 10, wherein linearly moving the high frequency coil member along the vertical direction further comprises:

actuating a Z axle servo motor to drive an annular transportation to descend the high frequency coil member along a Z axle linear sliding rail.

12. The method for pre-heating injection mold as claimed in claim 11, wherein linearly moving the high frequency coil member along the horizontal direction further comprises:

actuating an X axle servo motor to rotate an X axle ball screw and move the high frequency coil member to the surface of the die cavity of the female die along an X axle direction.

13. The method for pre-heating injection mold as claimed in claim 12, wherein after the high frequency coil member is moved to the surface of the die cavity of the female die along the X axle direction, further comprises:

actuating a Y axle servo motor to rotate a Y axle ball screw and move the high frequency coil member to the surface of the die cavity of the female die along a Y axle direction.

14. The method for pre-heating injection mold as claimed in claim 12, wherein introducing electromagnetic induction by the high frequency coil member on the surface of the die cavity for heating the die cavity further comprises:

when the surface of the die cavity is heated to a pre-determined temperature, the X axle servo motor and the Z axle servo motor are in sequence actuated to remove the lifting rack from the male die and the female die.