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Cam apparatus for valve stem actuation and method therefor

A cam and actuation technology, applied in the direction of mechanical equipment, application, food forming, etc., can solve the problem that the details are not described or claimed, etc.

Inactive Publication Date: 2013-09-18
HUSKY INJECTION MOLDING SYST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] While U.S. Patent No. 7,210,922 B1 describes a valve pin actuation plate whereby multiple valve stems are positioned together on a plate and reciprocated simultaneously via some means, the details of this aspect of the invention are not found in said document. neither describe nor claim

Method used

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  • Cam apparatus for valve stem actuation and method therefor
  • Cam apparatus for valve stem actuation and method therefor
  • Cam apparatus for valve stem actuation and method therefor

Examples

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Embodiment Construction

[0027] See the diagram, and from figure 1 Initially, a cam device 100 of a hot runner injection molding system according to the present invention is shown. The components shown are not a complete representation of the entire hot runner, but are those components necessary to understand and practice the invention.

[0028] see now figure 1 and figure 2 An electric motor 156 rotates ball screw 148 via coupling 154, which in turn causes axial translation of yoke 152 via ball screw nut 155, although it will be appreciated that the drive mechanism could alternatively be pneumatic or hydraulic. Attached to the yoke 152 are a plurality of cam bars 102 that traverse the bearing track 104 via linear bearings 146, each linear bearing 146 attached to the cam bar 102 via a plurality of fasteners 160, such as female Cap screws or equivalent, which securely retain cap 158 . Each cam bar 102 has a plurality of cam slots 112 cut therein, each cam slot 112 having a generally angled profile...

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PUM

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Abstract

A cam and cam follower apparatus translates linear cam bar movement to perpendicular valve stem actuation in an injection molding system. The cam bars reciprocate up and down on linear bearing rails such that an actuation plate, fitted with a plurality of valve stems, is cycled normal to the direction of the cam bar movement via cam followers traveling within cam slots in the cam bars. The cam slots in the cam bars are profiled such that the cam followers affect the speed and force at which the valve stems travel while at the same time reducing frictional effects and their associated power requirement. The cam followers of the valve stem actuation plate travel in cam slots in the cam bars from a valve stem forward position, to a valve stem retracted position and ultimately, the entire actuation plate may be removed from the cam bars for maintenance via open ended slots in the cam bars.

Description

technical field [0001] The present invention relates to, but is not limited to, injection molding systems, and more particularly, the present invention relates to a cam arrangement whereby a cam follower of a valve stem actuator plate is guided in a cam slot within a plurality of cam bars , the cam strip has an outlet for the actuation plate for its maintenance. Background technique [0002] Mechanical closure or closure of injection molded gate holes is typically accomplished using a valve stem or pin that is actuated via pneumatic, hydraulic or electromechanical means. The actuators may be positioned coincident with or adjacent to the valve stem movement and connected by means of a lever mechanism, or alternatively connected perpendicularly to the valve stem movement using a wedge arrangement. [0003] When the actuator movement is positioned perpendicular to the valve stem movement, the force required to move the valve stem depends on the friction between mating componen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23P1/00B29B11/06B29C35/00B29C45/00
CPCB29C2045/2831B29C2045/2813B29C45/281Y10T74/2101Y10T74/2107
Inventor 托马斯·乌拉茨阿卜迪斯兰·布蒂安德尔·阿克塞尔·克龙贝格托马斯·安德鲁·劳伦斯斯蒂芬·林伍德·格雷
Owner HUSKY INJECTION MOLDING SYST LTD