JPS60139418A - Product ejector for injection molding machine - Google Patents

Abstract

PURPOSE:To enable the withdrawal of a product with only a servomotor for driving a die clamping mechanism by mounting an ejector plate having a ejecting bar on a spring mobile disc as displaced therefrom so that it reciprocates several times once the die is fully opened with the servomotor. CONSTITUTION:When opening dies 13 and 14, a servomotor 1 is reversed to move the screw 5 to the left and a cross head 8 close joints 22 and 22' between links 9 and 10 and links 9' and 10' vertically through links 7 and 7'. Consequently, a mobile disc 12 and the die 13 move to the left so that an ejector plate 18 hits the tip of a ejecting bar 17 fixed on a stationary back pressure disc 11 and the ejecting bars 19 and 19' integrated with the ejector plate 18 are guided by guide holes 12a and 12a' and product withdrawing holes 20 and 20' to stick out into the die 13. Then, the servomotor is rotated backward or forward again to get the ejecting bars 19 and 19' into or out of the die 13 and thus, a product is taken out of the die 13.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application, etc.Prior Art The present invention relates to a device for ejecting products from injection molding (φ).

In the product ejection device of a conventional injection molding machine,
The movement of the ejector plate to the right of the ejector rod for ejecting the product was performed using hydraulic pressure +jNJf'f from a hydraulic cylinder or the like. Therefore, hydraulic pumps, valves, etc. are required, making the configuration complicated and expensive.

Purpose of the Invention The present invention improves the above-mentioned drawbacks and has a simple structure! 1 'c't
: The purpose is to provide a product ejection device for Q'1 ejection molding machines.

Structure of the Invention The product ejecting device for an injection molding machine of the present invention is a mold clamping device for an injection molding machine, and includes a movable platen for mounting a mold, a lever for driving the movable platen, and a movable platen formed on the movable platen. a protruding plate disposed on the movable platen and displaced by a spring or the like; The protruding plate contacts an abutting rod fixed to a fixed plate when the mold is fully opened, and when the mold is between the molds, the reciprocating motor is reversibly rotated to reciprocate the movable plate a plurality of times; The product is ejected by ejecting the ejecting rod into the mold a plurality of times using the ejecting rod.

Embodiment Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A gear 3 is provided. Reference numeral 4 is an operating gear that meshes with the drive gear 3. It has an integral nut (not shown), and a block IJ 115 is provided which is screwed into the nut. Reference numeral 6 indicates a double toggle. With a toggle mechanism of the type, one end of the link 7, 7' is rotatably fixed to the crosshead 8 installed at the tip of the screw 5, and the other end is rotatably fixed to the crosshead 8, which is attached to the tip of the screw 5. Furthermore, a link 10.10' is rotatably fixed to the link 9.9', and the link 9.9' is rotatably fixed to the fixed back pressure plate 11. The links 10, 10' are rotatably fixed to the movable platen 12, and these links 7, 7', 9
．． 9', 10, 10', and crosshead 8 constitute a toggle 1a structure 6. 13; 14 are molds, which are fixed to the movable plate 12 and fixed plate 15, respectively;
Guide holes 12a and 12a' are formed in the movable platen 12, and product ejection holes 20 and 20' are formed in the mold 13 and communicated with the guide holes 12a and 12a'. And the fixed plate 15. The fixed back pressure platen 11 is fixed to four tie bars 16-1 to 16-4, and a movable platen, 19, can be moved from side to side in the figure by a toggle mechanism 6 between the tie bars 16-1 to 16-1. There is. Reference numeral 17 denotes an abutting rod that is integrally provided with the fixed back pressure platen 11, and its length can be adjusted.

Reference numeral 18 denotes a protruding plate, which integrally has protruding rods 19 and 19', and the protruding rods 19 and 19' are provided with guide holes 12a,
12a' and the product removal hole 20°20', and the protruding plate 18 is displaced in the direction away from the movable platen 12 by a spring 21°21' or the like, as shown in the figure. It is designed so that it abuts against the abutting rod 17 just before the end of the mold opening.

Next, to explain the operation of the embodiment of the present invention, when the servo motor 1 rotates, the driving gear 3 rotates, the operating gear 4 that meshes with the driving gear 3 rotates, and the operating gear 4 rotates. The nut fixed to the gear 4 also rotates, and when the nut rotates, the screw 5, which is threaded into the nuts 1~, moves to the right in the figure while rotating in the clockwise direction due to the rotation of the nut. In this way, the rotational motion of the servo motor 1 is converted into the linear motion of the screw 5. As the screw 5 moves to the right in the figure, the crosshead 8 provided at the tip of the screw 5 moves through the link 7.7' to the junction point 22°22' of the link 9.10 and the links 9' and 10'. In order to press up and down in the figure, the mold 13 fixed to the movable platen 12 and the movable fA'a12 moves to the right in the figure, and the link 9.1 is moved to the right in the figure.
0 and link 9'.

The molds 13, 14 are closed just before the links 9, 10' are fully extended, and the servo motor 1 is stopped when the links 9, 10 and the links 9', 10' are fully extended.
Tie bar 1 by the length of 10, 9', and 10'
6-1 to 16-4, and the tie bar 16-1 to G
J:S, mold 1 due to the elastic recovery force generated by the elongation of
3. ．． 14 will be closed. When checking the molds 13 and 14, move the screw 5 to the left in the figure while avoiding reversing the revo motor 1, and move the crosshead 8 provided at the tip of the screw 5 through the link 7.7'. hand,
Junction point 2 of links 9, 10 and links 9' and "10"
2.22' is closed vertically as shown in the figure, the movable platen 12 and the mold 13 fixed to the movable platen 12 move in the fixing direction, and further move to the left due to the state shown in the figure. Before the end of opening of the mold 13.1/l, the tip of the abutment rod 17 fixed to the fixed back pressure plate 11
abuts against each other, and the protruding plate 18 is pressed against the spring 21.2.
1', the number of protrusions is 18, and the number of protrusions is +419.

19' is guide hole i2a, 12a' and product extraction hole 2
0.20' and protrudes into the mold 13.

Then, the servo motor is rotated reversely and forwardly again to move the ejector rods 19 and 19' in and out of the mold 13 two or three times to take out the product from the mold 13'? I.

Effects of the Invention The present invention displaces a protruding temporary having a product protruding rod from a spring movable platen and attaches it to the movable plate 513, and then uses the servo motor for moving the movable plate multiple times at the position where the mold has been fully formed. In order to reciprocate, the abutting rod installed on the fixed back pressure plate presses the ejecting plate multiple times, causing the ejecting rod to protrude into the mold multiple times to take out the product in the mold. Because of this, there is no need for a special drive device to drive the product ejecting rod as in the past, and the mold clamping machine 114 is driven by a single-bore motor (which also makes it possible to take out the product with a pusher). .

[Brief explanation of the drawing]

The figure is a partially broken pressure surface view of a JH puller according to an embodiment of the present invention. 1... Servo motor, 2... Position detector, 3...
Drive gear, 4... Operating gear, 5... Screw, 6... Toggle (number of configurations, 11... Fixed back pressure plate, 12)
...Movable plate, 14.15...Mold, 17...Abutting rod, 18...Protruding plate, 19.19'...Protruding rod, 19a, 19a'...Guide hole, 20.20'・
...Product removal hole, 21.21' ...Spring. Patent applicant FANUC Co., Ltd. Representative Patent attorney Tsukasa Takemoto Matsu (and one other person)

Claims (1)

[Scope of Claims] A mold clamping device for an injection molding machine, including a movable platen for mounting a mold, a servo motor for driving the movable platen, a guide hole formed in the movable platen, and a guide hole communicating with the guide hole. The projecting plate has a protruding rod that is inserted into a product ejection hole formed in the mold, and is provided on the movable plate by being displaced by a spring or the like,
[It has an abutting rod fixed to a stationary plate that comes into contact with the mold, and when making a mold, the servo motor is reversibly rotated, the movable plate is reciprocated several times, and the protruding rod is attached to the abutting rod. A product ejecting device for an injection molding machine, characterized in that the product is ejected by ejecting the product into the mold multiple times.