JPH0246142B2 - SHASHUTSUSEIKEIKANAGATASOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an injection mold device in which support plates such as ejector plates can be operated independently of each other.

(Prior art) A conventional injection mold device is provided with a first ejecting plate and a second ejecting plate, each of which has an ejecting pin protruding from it. Raise the first ejector plate located on the side mounting plate side, remove the spool runner, etc. with the ejector plate pin, further raise this first ejector plate, push up the second ejector plate, and operate the ejector pin. It was meant to push out the product (Special Publication No. 25452, Showa 47).

(Problem to be Solved by the Invention) According to the conventional example, the operation of the second ejection plate is subordinate to the operation of the first ejection plate, and the operation of the second ejection plate is dependent on the operation of the first ejection plate.
There was a problem that the operation of the ejector plate was restricted.

An object of the invention is to enable support plates such as ejector plates to function independently of each other.

(Means for Solving the Problems) In the injection molding mold device according to the present invention, the support plate is provided between the movable mold plate and the movable mounting plate with a distance between each other so that one does not interfere with the operation of the other. It is located. Of both support plates, if the support plate closer to the movable side mold plate is the first support plate, and the support plate closer to the movable side mounting plate is the second support plate, then the distance between the two support plates is the stroke of the second support plate. That's all. That is, both support plates are separated by a distance that does not cause the first support plate to move as the second support plate moves. Each of the first and second support plates has a protruding operating pin, and the operating pin of the second support plate passes through the first support plate. Operation pins include ejector pin, sprue lock pin,
Includes a sleeve for cutting the gate, a press rod that presses the molten resin in the runner, etc. Among the operation pins of each of the first and second support plates, the operation pin of one of the support plates is an ejector pin of a molded product. Further, at least two through holes are formed through the movable side mounting plate, and an insertion hole communicating with one of the through holes is formed through the second support plate. A cylinder is provided behind the movable mounting plate and is movable along the movable mounting plate by means of a repositioning rod. The ejector rod of this cylinder can be extended and retracted forward and backward of the movable mounting plate, and the ejector rod can be moved along the movable mounting plate in a contracted state by driving the position changing rod. The ejector rod expands and contracts as the cylinder is driven, selectively penetrates one through hole and insertion hole, and the other through hole, and can selectively push out the first support plate and the second support plate. It is.

(Example) Hereinafter, as an example of the present invention, an injection mold apparatus that can separately take out two types of molded products formed in a cavity will be described based on the drawings.

In Fig. 1, a fixed side template 1 and a movable side template 2 are shown.
are in contact with each other, forming a cavity on the facing surfaces. The fixed mold plate 1 is mounted on a fixed mounting plate 3, and the movable mold plate 2 is mounted on a movable mounting plate 6 via a receiving plate 4 and a spacer block 5. A sprue bush 7 is provided on the side of the stationary mold plate 1, and an injection molding nozzle 8 is disposed at the upper end opening of the sprue bush above the mounting plate 3 so as to be movable up and down.

By the way, in the spacer block 5 below the movable mold plate 2, a first ejector plate 9, which is a first support plate, and a second ejector plate 10, which is a second support plate, face each other with a predetermined distance. positioned. The first ejector plate 9 and the second
The ejector plates 10 are spaced apart from each other so that one does not interfere with the operation of the other.
The upper first ejector plate 9 is located on a receiving portion 5a provided on the spacer block 5, and can be raised and lowered by an ejector rod 11, which will be described later.
A first ejector pin 12 and a sprue lock pin 13 are protruded from the first ejector plate 9, and each pin passes through the receiving plate 4 and is movably inserted into the movable mold plate 2. The molded product 14a and the sprue runner 14c attached thereto can be pushed out.

Further, the lower second ejector plate 10 is located on the movable side mounting plate 6, and the ejector rod 11 is located on the movable side mounting plate 6.
It can be raised and lowered freely. A second ejector pin 15 is provided protrudingly on the second ejector plate 10, and this second ejector pin passes through the first ejector plate 9 and the receiving plate 4, and extends through the core 2 in the movable mold plate 2.
1 is movably inserted, and the second molded product 14 is inserted at the upper end.
b can be pushed out.

The movable side mounting plate 6 has through holes 6a and 6b arranged in parallel, passing through it in the vertical direction, and an ejector rod 11 can freely pass through each through hole. The second ejector plate 10 also has an insertion hole 10a extending through the ejector rod 11 in the thickness direction and communicating with the one through hole 6a. The ejector rod 11 is extendable and retractable by the operation of a cylinder 17 attached to the lower surface of a support plate 16 horizontally disposed below the movable mounting plate 6, as shown in FIGS. Support plate 16
The guide protrusions 16a and 16b on both sides of the movable side mounting plate 6 are slidably fitted into guide grooves on the end surface of the retaining plate 20 attached to the lower surface of the movable side mounting plate 6. At the end of the support plate 16, there is a mounting part 6 of the movable side mounting plate 6.
The tip of the position changing rod 19 of the cylinder 18 attached to the cylinder 18 is connected to the cylinder 18, and as the position changing rod expands and contracts, the support plate 16 can be moved in the horizontal direction. As the support plate 16 moves, the ejector rod 11 can selectively face the through holes 6a and 6b in a contracted state.

Next, the effect will be explained.

Fill the cavity with synthetic resin from nozzle 8,
After the filled synthetic resin is cooled and solidified, the movable sides such as the template 2 and the receiving plate 4 are retreated from the fixed side. Therefore, when removing the first molded product 14a from the molded product 14a and the molded product 14b,
First, as shown in the solid line in Figure 1, the ejector rod 1 is
1 through the left through hole 6a and the insertion hole 10a, and the upper end surface is brought into contact with the lower surface of the first ejector plate 9. Then, as shown in FIG. 3, the cylinder 17 is driven to extend the ejector rod 11 and the first
The ejector plate 9 is raised, the first ejector pin 12 is pushed out from the movable mold plate 2, and the first molded product 14a and the sprue runner 14c attached thereto are separated from the movable mold plate 2. Next, in order to take out the second molded product 14b, the ejector rod 11 is contracted and the upper end is attached to the movable side mounting plate 6.
Position change rod 1 below the bottom surface of
9 is contracted by driving the cylinder 18 to move the support plate 16 in the direction of the arrow, and move the ejector rod 11 from the left through hole 6a to the right through hole 6b. The movement of the support plate 16 is stopped. Thereafter, the cylinder 17 is driven as shown in the chain line in FIG. The ejector plate 10 is raised, the second ejector pin 15 protrudes from the upper surface of the core 21, and the second molded product 14b is separated from the movable mold plate 2.

By expanding and contracting the position changing rod 19 in this manner, the support plate 16 is moved horizontally, and the ejector rod 11 is alternatively positioned opposite either the through hole 6a or the through hole 6b, and the ejector rod is expanded and contracted. The molded products are sequentially taken out by raising and lowering the first ejector plate or the second ejector plate 10. Both ejector plates 9, 10
Which of these is activated first is selected as appropriate, taking into consideration the type of molded product, work efficiency, etc.

(Effect of the invention) As explained above, according to the present invention, the first
The support plate and the second support plate can operate independently of each other, and the order of operation can be arbitrarily switched without one support plate restricting the operation of the other support plate. There is no need to provide an ejector rod for each support plate, and one ejector rod can be used to push out each support plate, simplifying the configuration.

[Brief explanation of drawings]

FIG. 1 is a sectional view, FIG. 2 is a sectional view taken along the line of FIG. 1, and FIG. 3 is a sectional view showing the operating state of the first ejector plate. 1... Fixed side template, 2... Movable side template, 5... Spacer block, 6... Movable side mounting plate, 6a, 6b...
Through hole, 9... First support plate (first ejector plate), 10... Second support plate (second ejector plate), 10a... Insertion hole, 11... Ejector rod, 12... First ejector pin, 14
a, 14b... Molded product, 15... Second ejector pin, 16... Support plate, 17... Cylinder, 18... Cylinder, 19... Position change rod.

Claims (1)

[Scope of Claims] 1. A fixed side mold plate and a movable side mold plate that are in contact with each other, and a movable side mounting plate that is arranged at a distance behind the movable side mold plate, one of which moves the other. A first support plate and a second support plate are arranged between the movable side mold plate and the movable side mounting plate with a distance that does not obstruct the at least two through holes penetrating through the movable side mounting plate; and at least two through holes penetrating through the second support plate located on the movable side mounting plate side, and at least two through holes penetrating the movable side mounting plate. an insertion hole that communicates with one of the through holes; a cylinder that is provided at the rear of the movable side mounting plate and is movable along the movable side mounting plate with a position change rod; , an ejector rod that can extend and retract forward and backward of the movable side mounting plate, that can selectively pass through each of the through holes, and that can pass through the through holes; The operation pin of the plate passes through the first support plate, and the ejector rod can selectively push each of the support plates toward the stationary template side, and the operation pin of the first and second support plates passes through the first support plate. An injection mold device characterized in that the operation pin of one of the support plates is an ejector pin for a molded product.