JPH0345310A - Taking-out device for molding - Google Patents

Abstract

PURPOSE:To take out reliably a molding for the necessary minimum time, by a method wherein a taking-out device for the molding to which linear motion of a driving device opening or closing a mold member is transmitted performs position conversion to positions each of opening and closing of a mold member. CONSTITUTION:When a cam plate 8 is pulled back by a cylinder 15, a bottom force 6 is lowered with a follow-up movement of a cam follower 13 and the top and bottom forces 5, 6 are broken. On the one hand, a rotary shaft 20 is turned by a movement of a cam plate 8 and an autohand 25 is moved between the released top and bottom forces 5, 6. In this instance, since ejection of a molding 50 is being performed by an ejection unit 40, a finger 27 of the tip of the autohand arm 25 is approached to the molding 50 which is in a mounted state on the bottom force 6 by lowering the rotary shaft 20 by lowering a cylinder 28 and the molding 50 is held by a jaw 27a. Then when the cam plate 8 is extruded by the cylinder 15 after the autohand arm 25 is raised by pulling in the cylinder 28, the autohand arm 25 is turned, shunted from a space between the top and bottom forces 5, 6 and the molding 50 is taken out.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a molded product ejecting device, and more particularly to a molded product ejecting device suitable for an injection molding machine, particularly a vertically configured injection molding machine.

(Prior Art) Conventionally, in the injection molding method in which a molded product is manufactured by injecting a molding material such as plastic into a mold, hydraulic and electric injection molding machines have been mainly used. There is.

In such conventional injection molding machines, if the machine is configured horizontally, the mold is opened and closed in the horizontal direction, so that the molded product can be dropped and taken out from the opened mold. On the other hand, in a vertical injection molding machine, the mold is opened and closed in the vertical direction, so unlike a horizontal type, the molded product must be taken out manually or by an automatic hand.

(Problem to be Solved by the Invention) However, the molded product ejecting means using the automatic hand of a conventional vertical injection molding machine electrically synchronizes the opening/closing operation of the molding die and the operation of the automatic hand. Opening, rotation of the auto hand, lowering of the auto hand moved into the opened mold, clamping of the molded product with fingers, raising of the auto hand, return movement of the auto hand, etc. are performed in sequence, so these operations are performed in sequence. There was a problem in that it took time. In addition, a complex control mechanism is required to synchronize the opening and closing of the mold and the automatic hand, making it impossible to configure the entire device compactly and increasing costs.Furthermore, if an operation error occurs, the fingers may come into contact with the mold, causing the mold to fail. There was also the problem that the fingers could be damaged.

The present invention was developed in view of the above circumstances, and is particularly capable of ejecting a molded product in the minimum necessary time from an injection molding machine having a vertical type structure, and which does not require a complicated control mechanism. It is an object of the present invention to provide a molded product take-out device that can perform a reliable take-out operation with a simple mechanism without the need for a molded product take-out device.

(Means for Solving the Problems) In order to solve the above problems, a molded product removal device of the present invention is provided with a molded product removal device that is interlocked with a drive device that opens and closes a mold member, and which moves the drive device in a straight line. The present invention is characterized in that it has a converting means for transmitting the information to the ejecting means and for changing the position of the ejecting means to the opening and closing positions of the mold member.

(Function) The molded product retrieval device configured as described above includes a molded product retrieval means that operates in conjunction with a drive means for opening and closing the mold member, and the converting means allows the molded product retrieval device to
The linear movement of the drive means is transmitted to the molded product take-out means, and the molded product take-out means is configured to change the position of the mold member to open and close positions by the above-mentioned drive means, so that the mold member can be opened and closed. In conjunction with the operation of the driving means, the molded product ejecting means is moved to the opening and closing positions of the mold member.

In such a configuration, each element can operate following the linear motion of the drive means.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a molded product ejecting device according to an embodiment of the present invention, FIG. 2(a) is a side view taken from the direction A-A in FIG. Figures 3(a) and 3(b) are diagrams showing the lifting and lowering operation of the vertical type of the device shown in Figure 1.
A side view from the BB direction in the figure is shown.

In FIGS. 1 and 2, an injection cylinder unit 3 is vertically supported by a support member 11 (see FIG. 3), and a nozzle 3a at the lower end of the injection cylinder unit 1- is supported by the support member. Upper mold making (-1 opening 2a of plate 2 (second
(see figure), and is pressed against the runner artificial part 5a of the upper mold 5 fixed to the lower part of the upper mold mounting plate 2.

Below the two molds 5 thus provided, supporting bodies 1 are arranged side by side with an interval, and a guide rail 4 is attached to the upper end thereof. A cam plate 8 is slidably fitted to each of the guide rails 4 via a linear bearing 7 (in Fig. 1, the cam plate 8 on the opposite side is located at the bottom). (Illustrated with part of 16 cut away)
.

A rack gear 9 is attached to the outer surface of the cam plate 8 on one side along the horizontal direction, and each of the cam plates 8 has a third gear.
A cam groove 10 having a shape as shown in FIGS. (a) and (b) is provided.
-1 is given. This cam groove has a relatively long inclined part],
Oa, and a lower end portion 1. where the lower end of this inclined portion is formed almost horizontally. Ob and an upper end portion 10c whose upper portion has a gentler inclination angle θ than that of the inclined portion 10a are continuously formed.

There is a gap between the cam plates 8 facing each other as shown in FIG. 2(a).
) and FIG. 3(a), (tel), the lower mold 6 and the lower mold plate (11) which holds this lower mold are connected to the guide shaft 14 through the guide bush 14a. In addition to being supported so as to be movable downward, a support plate 3° (see Fig. 1) for the six horizontal bundle receivers is provided on the side of the lower mold mounting plate 12, and the lower mold mounting plate is connected to this support plate. ] Pivotally supported by pin 32 provided on the side of 2! Also, the cam roll 31 is brought into contact with and fitted into the lifting part of the lower die 6 (and the cylinder cylinder 15
can bear the lateral load during horizontal driving.

Cam followers 13 are fixed to both sides of the lower die 6, and each cam follower is slidably fitted into a cam groove 10 of the cam plate 8.

Further, an arm j7 is fixed to each cam plate 8 to integrally connect each cam plate 8 in the direction along the guide rail 4, and a horizontal drive cylinder 5 is connected to the arm 17.

Therefore, each cam plate 8 moves integrally on the guide rod 4 by the horizontal drive of the cylinder 15. At this time, since the lower mold 6 can only move in the vertical direction as described above, the cam follower 13 can move the lower mold 6 up and down by following the cam groove 10. In addition, the cam follower 13 is attached to the lower mold 6.
Instead, it may be provided on the lower die mounting plate 12.

In such an operation, as shown in FIG. 3(b),
When the lower mold 6 tries to contact the upper mold 5, force! \Follower] 3 is the inclined part 1.0a of the cam groove 10 and the upper end part 1.0a. O
Although it is located near the boundary with cylinder c, it continues to be located at cylinder 15.
If the extrusion operation continues, the cam follower 13 can perform mold clamping while being driven by the upper end having a gentle inclination angle θ.

The cylinder 15 is provided with a sensor unit 18 for detecting the stroke of the cylinder, and this sensor unit detects the movement of the output end of the cylinder 15, which moves against the spring force within the sensor unit during mold clamping. A light sensor is connected. Based on the detection result by the sensor unit 18, it is determined whether the relationship between the mold stroke and the cylinder stroke is normal or not. 1. If an abnormality is determined, such as a foreign object in the mold, the safe drive control immediately stops the cylinder drive. It is done.

On the other hand, a pinion gear 21 that fits into the rack gear 9 of the cam plate 8 is connected to the key 2 between the support body l and the upper die mounting plate 2.
A rotating shaft 20 fixed at 2 is provided so as to be rotatable and movable up and down via a bushing 23.A coil spring 24 is interposed between the pinion gear 21 of this rotating shaft 20 and the support body 1, and this spring causes the rotation. The shaft 20 is biased upward. Further, on the pinion gear 21 of the rotating shaft 20, there is an O-1 hand arm 25 with a finger 27 attached to the lower tip.
are fastened with bolts 26. The auto hand arm 25 is rotated by the rotation of the rotating shaft 20, and the fin car 27 at the tip can be moved between the lower molds 5 and 6. The upper end of the rotating shaft 20 passes through the upper die mounting plate 2,
A vertically moving cylinder 28 having a thrust bearing unit 29a at its tip is in contact with its upper end. Therefore, the auto hand arm 25 is raised and lowered by vertically driving the cylinder 28 and vertically moving the rotary shaft 20 by the coil spring 24, and by horizontally driving the cylinder 15, the rack 9 is rotated by rotating the pinion gear 21. It will be done.

Further, a stopper ring 29b is slidably fitted on the outer periphery of the rotating shaft 20 of the upper die mounting plate 2, and the vertical movement cylinder 28
The downward stroke of the rotary shaft 20 due to the vertical drive of the rotary shaft 20 is determined.

With the above configuration, when the downward stroke of the auto hand arm 25 is changed, the rod of the cylinder 28 is retracted and the rotating shaft 20 is pushed up against the coil spring 24, thereby creating a gap between the thrust bearing unit 29a and the tip of the rotating shaft 20. This can be easily done by opening the stopper ring 2'9b and changing the stopper ring 2'9b to one with a different height.

Note that the ejection unit 40 provided on one side of the lower die 6
For example, the bin 4 that projects the molded product 50 stored in the lower mold 6
1, a unit for supporting the bottle 41 and projecting the plate 42, and as shown in FIG. male threaded part 44 and female threaded part 4 inside the lower die rod 46.
6a, a nut 45, a positioning part 46c, and a stopper 46b, and the entire length of the protrusion unit 1-40 (from the upper rod 43 to the stopper 46b) can be adjusted. Reference numeral 47 denotes a protrusion unit holder which detachably supports the protrusion unit, has a hole through which the positioning portion 46C of the protrusion unit is inserted, and holds the protrusion unit. The protrusion unit 40 is attached to the lower die mounting plate 12
is inserted through the through hole. With such a configuration,
The lower mold 6 descends by a certain stroke relative to the ejection unit 40, the ejection pin support bullet 42 in the lower mold 6 comes into contact with the tip of the upper rod 43 of the ejection unit 40, and the lower mold 6 continues to descend until the final stroke. The molded product 50 is protruded when the molded product is taken out.

Next, FIG. 3 (
This will be explained using a) and (b).

Note that in FIGS. 3(a) and 3(b), some parts are omitted or shown with dotted lines (for example, the cam plate 8) for convenience of explanation. Further, the automatic hand 25 for taking out the molded product and the like are omitted because they complicate the illustration.

FIG. 3(a) shows a state in which the cam follower 13 is fitted into the lower end portion 10b of the cam groove 10. At this time, the lower die 6 is at the lowest position. From this state, when the cam plate 8 is pushed out by the cylinder 15, the cam follower 13 moves into the cam groove 10.
The lower mold 6 rises as it moves upward along the inclined portion 10a of the cam follower ]3, and the lower mold 6 comes into contact with the upper mold 5 as shown in FIG. 3(b). It is located near the population of Further, as the cylinder 15 continues to push out the cam plate 8, the inclination angle θ provided at the upper end 10c of the cam groove 10 increases the cylinder output due to the wedge effect as described above. Mold clamping can be performed. Next, the molten molding resin from the injection cylinder output 1-3 is injected into the upper and lower molds 5.6.

When taking out the molded product 50, when the cam plate 8 is pulled back from the above state by the cylinder 15, the cam follower 13 moves into the cam groove 1.
3 (a) again while following the inclined part 10a of 0 in one direction.
), the lower end 1. of the cam groove 10. It will be in a state where it is fitted into Ob. At this time, the lower mold 6 is lowered by the cam follower j3, and the molds are opened between the upper and lower molds 5.6. On the other hand, as the cam plate 8 moves, the rotating shaft 20 rotates, and the auto hand 25 moves between the opened lower molds 5 and 6. At this time, since the molded product 50 is being ejected by the ejecting unit 40 as described above, the cylinder 28
By lowering the thrust pairing unit I-29a until it comes into contact with the stoppering unit +-29b, the rotating shaft 20 is lowered and one finger 27 at the tip of the auto hand arm 25 is placed on the lower mold 6''2. A certain molded product 50 is approached and the molded product 50 is gripped by the jaws 27a.

Next, the cylinder 27 is retracted, and the auto hand arm 25
After raising, when the cam plate 8 is pushed out by the cylinder 15, the autohammer 25 rotates and is evacuated from between the upper and lower molds 5.6, and the knife mold 6 is raised, and the third mold is moved again. As shown in Figure (b), the upper and lower molds 5.6 are brought into contact with each other.At this time, the auto hand arm 25 is completely retracted from between the upper and lower molds, and during this time, the cylinder 28 is further driven up and down. The finger 27 is a molded product 5 that has been taken out 7.
0 can be placed in a finished product storage area (not shown) provided outside the mold.

In this way, in the apparatus of this embodiment, the opening and closing of the mold and the ejection of the molded product by the auto hand arm 25 are automatically performed in conjunction with the horizontal drive of the cylinder 15, so a complicated control mechanism is not required and a simple Depending on the structure, it is possible to reliably open and close the mold and take out the molded product.

Note that the molded product ejecting device of the present invention can also be applied to an injection molding machine configured horizontally as shown in the following two configurations; Since it is easier to take out the molded product than to remove the molded product, it is particularly effective in vertical injection molding machines that conventionally required a complicated mechanism. Combat the entire device with a simple mechanism without breaking it.
It can be configured as follows.

Further, in this embodiment, a specific example is shown in which it is applied to an injection molding machine, but the molded product ejecting device of the present invention is not particularly limited to injection molding machines, but can be applied to mold members that require opening and closing operations of the mold. It is also possible to apply it to all molding machines using.

(Effects of the Invention) As explained above, the molded product ejecting device of the present invention does not need to control the operation of each element by electrical or other control means unlike conventional devices, and the molded product ejecting device of the present invention does not need to control the operation of each element by electrical or other control means. The ejecting operation can be configured to follow the linear movement of the drive means for opening and closing the mold member.

Therefore, operations such as opening/closing the mold member and taking out the molded product can be reliably performed in the minimum amount of time using a simple mechanism, and the safety of the apparatus and cost reduction can be achieved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a molded product removal device according to an embodiment of the present invention. FIG. 2(a) is a side view from the direction A-A in FIG. 1, FIG. 2(b) is a configuration diagram of the protruding unit shown in FIG. ) and (b) are diagrams showing the vertical movement of the apparatus shown in FIG. 1, and are side views taken from the direction BB in FIG. 1. 5 2...Upper die mounting plate 3...Injection cylinder unit 4...Guide rail 5...Upper die 6...Lower die 8...Cam plate 9...Rack gear lO...Cam Groove 11... Support member 12... Lower die mounting plate 13... Cam follower 14... Lower die lifting guide shaft 15... Horizontal drive cylinder 20... Rotating shaft 21... Pinion gear 25...Auto hand 28...Vertical movement cylinder

Claims (3)

[Claims] (1) A molded product take-out means is provided which is interlocked with a drive means for opening and closing the mold member, and the linear motion of the drive means is transmitted to the take-out means, and the take-out means is positioned at each of the opening and closing positions of the mold member. A molded product removal device characterized by having a conversion means for conversion. (2) the converting means includes a cam interlocked with the driving means;
2. The molded product removal device according to claim 1, further comprising rotation means connected to said cam. (3) A claim characterized in that the method includes means for moving the ejecting means in one direction of the opened mold member, and the moving means has a shaft that allows translation and rotation in conjunction with the ejecting means. Item 2. Molded product removal device.