Highly-viscous substance dispensing method and highly-viscous substance dispensing apparatus

Patent metadata

Field	Value
Publication number	US-2018264530-A1
Application number	US-201515542607-A
Country	US
Kind code	A1
Filing date	May 15, 2015
Priority date	May 15, 2015
Publication date	Sep 20, 2018
Grant date	—

Abstract

Each time a highly-viscous substance is extruded, a variation in weight of each cut piece of the highly-viscous substance is minimized. Metallic sodium ( 5 ) loaded in an extruder main body ( 3 ) is extruded from a nozzle ( 7 ) of the extruder main body ( 3 ) with a pressing tool ( 4 ) and, when it is detected that the metallic sodium ( 5 ) is extruded to a predetermined position, the movement of the pressing tool ( 4 ) is stopped and the extruded metallic sodium ( 5 ) is cut. In this case, an impulse (P) after stop is brought closer to a constant value until a load no longer acts on the metallic sodium ( 5 ) in the extruder main body ( 3 ) after stopping the movement of the pressing tool ( 4 ) by adjusting the movement speed of the pressing tool ( 4 ).

First claim

1 . A highly-viscous substance dispensing method including extruding a highly-viscous substance loaded in an extruder main body from a nozzle of the extruder main body with a pressing tool moving in the extruder main body, and cutting the extruded highly-viscous substance after stopping the movement of the pressing tool when it is detected that the highly-viscous substance is extruded to a predetermined position, wherein
an impulse after pressing-tool movement stop with respect to the highly viscous substance is brought closer to a constant value until a load no longer acts on the highly-viscous substance in the extruder main body after stopping the movement of the pressing tool by adjusting the movement speed of the pressing tool.

2 . The highly-viscous substance dispensing method according to claim 1 , wherein
a target impulse after pressing-tool movement stop is set as the constant value, and wherein the movement speed adjustment of the pressing tool is performed by changing a next movement speed of the pressing tool such that the impulse after pressing-tool movement stop comes closer to the target impulse after pressing-tool movement stop.

3 . The highly-viscous substance dispensing method according to claim 2 , wherein
the next movement speed of the pressing tool is changed such that when the impulse after pressing-tool movement stop is larger than the target impulse after pressing-tool movement stop, the next movement speed of the pressing tool is made lower than a current movement speed of the pressing tool and that when the impulse after pressing-tool movement stop is smaller than the target impulse after pressing-tool movement stop, the next movement speed of the pressing tool is made higher than the current movement speed of the pressing tool.

4 . The highly-viscous substance dispensing method according to claim 1 , wherein
the movement speed adjustment of the pressing tool is performed by selecting as the movement speed of the pressing tool a movement speed at which the impulse after pressing-tool movement stop associated with a mass change of the highly-viscous substance in the extruder main body falls within a predetermined allowable range.

5 . The highly-viscous substance dispensing method according to claim 1 , wherein
the highly-viscous substance is extruded with the pressing tool sequentially through a plurality of stages of movement speed mode ranges, wherein the impulse after pressing-tool movement stop is brought closer to a constant value by adjusting the movement speed in the movement speed mode range of a final stage out of the plurality of stages of movement speed mode ranges, and wherein the movement speed in the movement speed mode range of a preceding stage before the movement speed mode range of the final stage is made faster than the movement speed in the movement speed mode range of the final stage.

6 . The highly-viscous substance dispensing method according to claim 5 , wherein
a target impulse after pressing-tool movement stop is set as the constant value, and wherein the movement speed adjustment of the pressing tool in the final stage is performed by changing a next pressing-tool movement speed in the final stage such that the impulse after pressing-tool movement stop comes closer to the target impulse after pressing-tool movement stop.

7 . The highly-viscous substance dispensing method according to claim 5 , wherein
the movement speed adjustment of the pressing tool in the final stage is performed by selecting as the movement speed of the pressing tool a movement speed at which the impulse after pressing-tool movement stop associated with a mass change of the highly-viscous substance in the extruder main body falls within a predetermined allowable range.

8 . The highly-viscous substance dispensing method according to claim 1 , wherein
the highly-viscous substance is a clay-like substance.

9 . A highly-viscous substance dispensing apparatus extruding a highly-viscous substance loaded in an extruder main body from a nozzle of the extruder main body with a pressing tool moving in the extruder main body, and cutting the extruded highly-viscous substance after stopping the movement of the pressing tool when it is detected that the highly-viscous substance is extruded to a predetermined position, the apparatus comprising:
a pressing-tool drive adjusting means driving and adjusting a pressing-tool driving means moving the pressing tool; a cutting-tool drive adjusting means driving and adjusting a cutting-tool driving means driving the cutting tool; a highly-viscous substance detecting means detecting that the highly-viscous substance extruded from the nozzle of the extruder reaches a predetermined position; a setting means setting a movement speed of the pressing tool; a control executing means moving the pressing tool by adjusting the pressing-tool drive adjusting means based on information from the setting means, the control executing means controlling the pressing-tool drive adjusting means to stop the movement of the pressing tool and controlling the cutting-tool drive adjusting means to cut the highly-viscous substance when determining that the highly-viscous substance extruded from the nozzle of the extruder reaches the predetermined position based on information from the highly-viscous substance detecting means; and a movement speed adjusting means bringing an impulse after pressing-tool movement stop with respect to the highly viscous substance closer to a constant value until a load no longer acts on the highly-viscous substance in the extruder main body after stopping the movement of the pressing tool by adjusting the movement speed of the pressing tool.

10 . The highly-viscous substance dispensing apparatus according to claim 9 , wherein
the setting means sets a target impulse after pressing-tool movement stop, and wherein the movement speed adjusting means includes an impulse-related information detecting means detecting information related to the impulse after pressing-tool movement stop, and a changing means deriving the impulse after pressing-tool movement stop based on information from the impulse-related information detecting means and changing the movement speed of the pressing tool set by the setting means such that the impulse after pressing-tool movement stop comes closer to the target impulse after pressing-tool movement stop set by the setting means.

11 . The highly-viscous substance dispensing apparatus according to claim 10 , wherein
the changing means is set such that when the impulse after pressing-tool movement stop is higher than the target impulse after pressing-tool movement stop, a next movement speed of the pressing tool is made lower than a current movement speed of the pressing tool and that when the impulse after pressing-tool movement stop is lower than the target impulse after pressing-tool movement stop, the next movement speed of the pressing tool is made higher than the current movement speed of the pressing tool.

12 . The highly-viscous substance dispensing apparatus according to claim 9 , wherein
the setting means sets the movement speed of the pressing tool as the movement speed adjusting means such that the impulse after pressing-tool movement stop associated with a mass change of the highly-viscous substance in the extruder main body falls within a predetermined allowable range.

13 . The highly-viscous substance dispensing apparatus according to claim 9 , wherein
the setting unit sets that the highly-viscous substance is extruded with the pressing tool sequentially through a plurality of stages of movement speed mode ranges, sets respective move

Assignees

• Nittan Valva

Inventors

• Homma Koichi
• Niiro Masaaki
• Sato Daiki

Classifications

• F01L2303/01

  Tools for producing, mounting or adjusting, e.g. some part of the distribution · CPC title

• B21C23/211

  Press driving devices · CPC title

• F01L3/24

  Safety means or accessories, not provided for in preceding sub- groups of this group · CPC title

• B21C31/00

  Control devices for metal extruding, e.g. for regulating the pressing speed or temperature of metal (B21C25/08 takes precedence); Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses · CPC title

• B21C23/215 Primary

  Devices for positioning or centering press components, e.g. die or container · CPC title