Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to close mold
Reexamination Certificate
2000-04-19
2002-04-02
Heitbrink, Tim (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means to close mold
C426S593000
Reexamination Certificate
active
06364655
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to an arm structure for an injecting molding machine, particularly to one moved by an oil pressure cylinder injecting molding machine positioned between a receiving disc and a movable mold base, never colliding with the oil pressure cylinder when the arm structure retreats inward.
A common known conventional arm-style injecting molding machine includes an arm structure
30
as shown in
FIG. 5
, pivotally connected between a movable mold base
10
and a receiving disc
20
. The arm structure includes a first arm
301
, a second arm
302
, and a third arm
303
mutually and pivotally connected with each other. Further, the first arm
301
is pivotally connected onto a cress-shaped head
304
and then also pivotally connected to the second arm
302
, which has one end pivotally connected to the receiving disc
20
and the other end pivotally connected to the third arm
303
. The other end of the third arm
303
is pivotally connected to the movable mold base
10
. The oil pressure cylinder
40
fixed on the receiving disc and extending outward has its piston rod
401
connected firmly on the cross-shaped head
304
. Then the oil pressure cylinder
40
operates to move the movable mold base
10
to open and close the mold.
However, as the oil pressure cylinder
40
extends out of the machine body, it takes a large space whether in transporting or installing, especially in installing, the oil pressure cylinder occupies a large space of a factory, causing a problem in arranging working place and the injecting molding machine. So, some makers have tried to position the oil pressure cylinder for moving the arm structure between the receiving disc and the movable mold base. However, the space between the receiving disc and the movable mold base is limited so the pivotal joint of the second arm collides with the oil pressure cylinder body extending in the receiving disc when the arm structure retreats inward. Besides, a smaller oil pressure cylinder cannot be used because of mold closing force being not enough, in order to avoid operating radius of the joint of the second arm.
SUMMARY OF THE INVENTION
The invention has been devised to offer an arm structure for an injecting molding machine, having an oil pressure cylinder positioned between the receiving disc and the movable mold base. A second arm and a third arm are formed with plural pivotal plates, which are pivoted with the fix plate of the receiving disc and the movable mold base. The two inner pivotal plates of the second arm are located in the two sides of the cylinder with a space a little larger than the outer diameter of the oil pressure cylinder. In addition, the space between the two joints pivotally connected between the second and the third arms are also a little larger than the outer diameter of the coil pressure cylinder. Therefore, The joints between the second and the third arm can pass through without colliding with the oil pressure cylinder, when the arm structure retreats, in opening the mold and subsequently closing the mold. Thus, the oil pressure cylinder can be positioned inside the receiving disc, reducing the dimensions of an injecting molding machine for transportation and installation of the injecting and molding machine.
REFERENCES:
patent: 4088432 (1978-05-01), Farrel
patent: 4545757 (1985-10-01), Romi
Heitbrink Tim
Hwa Chin Machinery Factory Co. Ltd.
Rosenberg , Klein & Lee
LandOfFree
Arm structure for an injection molding machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Arm structure for an injection molding machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arm structure for an injection molding machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2931131