JPH081728A - Taking-out device of injection-molded product - Google Patents

Abstract

PURPOSE:To shorten a molding cycle by shortening a taking out time of a molded product. CONSTITUTION:This device is constituted so that a condition wherein a space between confronting faces of a movable mold 4 and stationary mold 2 become identical with dimensions of a thickness direction of a moving part 5X within the mold in a taking out mechanism 5 by a movement of the movable mold 4 in a mold breaking direction is detected by a detecting device 8 and the moving part 5X within the mold is moved forward in the direction of the inside of the mold from a fixed awaiting position at real time by numerical control of a control device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding product takeout device for automatically taking out a resin molding product molded by an injection molding machine.

[0002]

2. Description of the Related Art Generally, a resin molded product molded by an injection molding machine is automatically taken out by an injection molded product takeout device. FIG. 6A to FIG. 6 show an automatic procedure for automatically taking out a molded product by an injection molded product take-out device that has been conventionally used.
Description will be made based on (j) and (k) to (r) of FIG. 7. (A). A fixed mold 2 attached to a fixed platen 1,
When the movable mold 4 attached to the movable platen 3 is clamped, molten resin is injected into a cavity (not shown) formed by the fixed mold 2 and the movable mold 4, and is formed into a predetermined shape. You. At this time, a take-out mechanism (not shown)
Is in a standby state at a predetermined standby position. Here, a mold opening signal is output from the control means (not shown) to the opening and closing mechanism (not shown) of the movable mold 4. (B). The movable mold 4 starts the mold opening. (C). The movable mold 4 reaches the mold opening position. (D). The control means outputs an in-mold entry start signal of the grip portion 5A to the extraction mechanism. (E). The gripper 5A enters the mold based on the numerical control of the control means. (F). The gripper 5A reaches a fixed position in the mold based on the numerical control of the control means. (G). An operation start signal is output from the control means to an actuator for an ejector (not shown). (H). An ejector (not shown) operates. (I). The molded product 6 is made to protrude by the ejector, and the gripping part 5A holds the molded product 6 by suction or mechanically by the operation of the pneumatic device incorporated in the take-out mechanism. That is, the molded product 6 is chucked by the gripping portion 5A. (J). The chucking of the molded product 6 by the grip 5A is confirmed. (K). The control unit outputs a pull-out start signal for the gripper 5A to the take-out mechanism. (L). The grip portion 5A is pulled out and moved based on the numerical control of the control means. (M). The pull-out movement of the grip 5A is completed. (N). From the control means, a withdrawal start signal of the grip portion 5A is output to the ejection mechanism. (O). The grip portion 5A moves out of the mold based on the numerical control of the control means. (P). The grip portion 5A completes the withdrawal from the mold. (Q). A mold clamping signal is output from the control means to the opening and closing mechanism of the movable mold 4. That is, the next cycle start signal is output. (R). The movable mold 4 starts clamping. (S). The movable mold 4 is clamped to be in the state of (a), and thereafter, the above procedure is repeated to continuously remove the molded product 6.

[0003] The above-mentioned take-out procedure is performed by sequence control. Therefore, there is a problem that the time for taking out the molded product becomes relatively long and the molding cycle becomes long.

By the way, when the grip portion 5A starts to enter the mold,
In (b), the movable mold 4 starts to open the mold, and in (c), after the movable mold 4 reaches the mold opening limit position, the control means outputs an in-mold entry start signal to the ejection mechanism. It is done by That is, when the movable mold 4 is completely opened, the grip portion 5A is finally inserted into the mold. Further, the grip portion 5A has a releasing distance with respect to the movable mold 4 in the mold open position, that is, the pull-out moving distance l of the grip portion 5A in the above (m).
In consideration of the above, it is configured to move back and forth at a position biased to the fixed mold 2 side. The present inventor has completed the present invention as a result of earnest research focusing on this point.

[0005]

A problem to be solved is that it takes a long time to take out a molded product and a molding cycle becomes long.

[0006]

The present invention comprises a fixed mold,
A movable mold which is provided in the fixed mold so as to be movable back and forth and forms an injection molding cavity together with the fixed mold, a detection means for continuously detecting the movement start and the movement amount of the movable mold, and the cavity. An ejector for ejecting a molded product that is held in the movable die and moved to a mold opening completion position after being molded, a take-out mechanism provided with a gripping portion for grasping the molded product ejected by the ejector, and the take-out mechanism. And a control means for numerically controlling the mechanism, and by moving the movable mold in the mold opening direction, the distance between the facing surfaces of the movable mold and the fixed mold is the thickness direction of the in-move / retract part of the take-out mechanism. Detecting means for detecting a state in which the size is the same as the size, and numerical control of the control means based on the detection by the detecting means moves the in-move-and-retract part in the mold from the predetermined standby position to the in-mold direction in real time. Characterized by being configured so as to, the time for taking out the molded article was shortened to achieve the purpose of shortening the molding cycle.

[0007]

According to the present invention, when the movable mold is moved in the mold opening direction, the distance between the opposing faces of the movable mold and the fixed mold is the same as the dimension in the thickness direction of the in-mold advancing / retreating portion of the ejection mechanism. When the detecting means detects the size-increased state, the in-mold advancing / retreating site is moved forward inward in the mold,
The time required for the movable mold to move to the mold opening completion position from the detection timing of the detection means can be shortened.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a main part of an injection molding machine provided with the present invention. It should be noted that the same or corresponding portions as those in the conventional example will be described by attaching the same reference numerals. In this figure, a fixed die 2 is attached to a fixed platen 1, and a movable die 4 is attached to a movable platen 3. Movable platen 3
Has one end movable along a plurality of tie bars 7 attached to the fixed platen 1, and a cavity (not shown) is formed by clamping the fixed mold 2 and the movable mold 4. Is filled with a molten resin from an injection device (not shown).

The injection-molded product take-out device is provided with a movable platen 3, that is, a detection means 8 for detecting the movement of the movable mold 4, a take-out mechanism 5 for taking out the molded product 6, and a control means 9. An ejector (not shown) for projecting the article 6 is provided.

The detecting means 8 comprises an encoder 8A and a magnetic scale 8B, the encoder 8A is mounted on the fixed platen 1, the magnetic scale 8B is mounted on the movable platen 3, and the magnetic scale 8B is mounted on the movable platen 3.
With the movement of, the relative movement with respect to the encoder 8A. Therefore, the moving amount of the movable platen 3, that is, the moving amount of the movable mold 4, is continuously detected by the encoder 8A.

The take-out mechanism 5 has a support portion 5B extending in the vertical Y-axis direction, and an arm portion 5C extending in a direction perpendicular to the support portion 5B (horizontal X-axis) is attached to the support portion 5B. There is. The arm portion 5C includes a take-out arm 5D,
A chuck plate, that is, a grip portion 5A is attached to the tip of the take-out arm 5D. The grip portion 5A, the arm portion 5C, and the take-out arm 5D form an in-mold advance / retreat portion 5X.

A pneumatic equipment and a servomotor (both not shown) are incorporated in a base 5E on which the support 5B is erected, and servomotors 5F and 5G are attached to the support 5B and the arm 5C. ing. Therefore, the arm portion 5C moves in the Y-axis direction by driving the servo motor 5F, and the take-out arm 5D moves in the X-axis direction by driving the servo motor 5G. The arm 5C rotates with respect to the support 5B by driving the servomotor in the base 5E.

The detecting means 8 is electrically connected to the control means 9, and the control means 9 controls the operation of the take-out mechanism 5.

Next, the automatic take-out procedure of the molded product according to the present invention will be described with reference to FIGS. 2 (a) to 2 (j) and 3 (k) to 3.
Description will be made based on (r). (A). A fixed mold 2 attached to a fixed platen 1,
When the movable mold 4 attached to the movable platen 3 is clamped, molten resin is injected into a cavity (not shown) formed by the fixed mold 2 and the movable mold 4, and is formed into a predetermined shape. You. At this time, a take-out mechanism (not shown)
Is in a standby state at a predetermined standby position. Here, the opening / closing mechanism (not shown) of the movable mold 4 from the control means 9
A mold open signal is output to. (B). The movable mold 4 starts the mold opening. (C). By moving the movable mold 4 in the mold opening direction, as shown in FIG.
When the distance L between the facing surfaces of the movable mold 4 and the fixed mold 2 becomes the same as the thickness direction dimension T of the in-mould advance / retreat portion 5X of the take-out mechanism 5, as shown in FIG. Detect
The detection signal is input to the control means 9. (D). The control means 9 uses the signal (c) input from the detection means 8 in real time to extract the mechanism 5.
The in-mold advancing / retreating portion 5X is output to the in-mold advancing / retreating portion 5X, and the in-mold advancing / retreating portion 5X is moved forward from a predetermined standby position in the in-mold direction. (E). The movable mold 4 reaches the mold opening position. At this point, the in-mould advance of the in-mould advance / retreat portion 5X has already been completed. (F). Based on the numerical control of the control means 9, the grip portion 5A reaches a fixed position in the mold. (G). An operation start signal is output from the control means 9 to an actuator for an ejector (not shown). (H). An ejector (not shown) operates. (I). The molded product 6 is made to protrude by the ejector, and the gripping part 5A holds the molded product 6 by suction or mechanically by the operation of the pneumatic device incorporated in the take-out mechanism. That is, the molded product 6 is chucked by the gripping portion 5A. (J). The chucking of the molded product 6 by the grip 5A is confirmed. (K). The control means 9 outputs a pull-out start signal of the grip portion 5A to the take-out mechanism 5. (L). Based on the numerical control of the control means 9, the grip portion 5A is pulled out and moved. (M). The pull-out movement of the grip 5A is completed. (N). The control means 9 outputs a withdrawal start signal of the grip portion 5A to the ejection mechanism 5. (O). Based on the numerical control of the control means 9, the grip part 5A moves out of the mold. (P). The withdrawal of the grip 5A from the mold is completed. (Q). A mold clamping signal is output from the control means 9 to the opening / closing mechanism of the movable mold 4. That is, the next cycle start signal is output. (R). The movable mold 4 starts clamping. (S). The movable mold 4 is clamped to be in the state of (a), and thereafter, the above procedure is repeated to continuously remove the molded product 6.

As described above, due to the movement of the movable mold 4 in the mold opening direction described in (c) above, the distance L between the facing surfaces of the movable mold 4 and the fixed mold 2 moves in and out of the take-out mechanism 5. When the size becomes the same as the size T of the part 5X in the thickness direction, the detecting means 8 detects this state and inputs a detection signal to the control means 9, whereby the in-die retracting part 5X is set to a predetermined position in (d). Since it is moved forward from the standby position toward the inside of the mold in real time, the time required for the movable mold 4 to move from the detection timing of the detecting means 8 to the mold opening completion position, that is, the movable mold of FIG. 4 is from the P position to the mold opening completion position P
The molding cycle can be shortened by shortening the time required to move by the distance L1 up to 1.

In the above embodiment, the distance L between the facing surfaces of the movable mold 4 and the fixed mold 2 is determined by the moving-in / withdrawing portion 5 of the take-out mechanism 5.
The state in which the size becomes the same as the dimension T in the thickness direction of X is detected by the detecting means 8 including the encoder 8A attached to the fixed platen 1 and the magnetic scale 8B. Is not limited to the above-mentioned embodiment, and although not shown, a well-known detecting means such as a limit switch or an optical sensor is separately provided, and the moving amount of the movable mold 4 is set to T by the detecting means. It may be configured to detect the state of the same size and output a detection signal to the control means 9.

Further, the description has been given using the take-out mechanism 5 having a structure in which the in-mould advance / retreat portion 5X moves linearly forward and backward when the die is opened. For example, as shown in FIG. It is also possible to use the take-out mechanism 5 provided with the in-mold advancing / retreating portion 5X having a structure in which the gripping portion 5A is moved in the arcuate direction by rotating about the axis of.

[0018]

As described above, according to the present invention, when the movable mold moves in the mold opening direction, the distance between the facing surfaces of the movable mold and the fixed mold is the same as that of the in-mold advancing / retreating portion of the take-out mechanism. When the detecting means detects the state that the size is the same as the thickness direction, the in-mold advancing / retracting part is moved forward inward in the mold in real time, so that the movable mold is completely opened from the detecting timing of the detecting means. The molding cycle can be shortened by shortening the time required to move to the position.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of an injection molding machine equipped with the present invention.

2A to 2J are explanatory views showing the first half of the operating procedure of the present invention.

3 (k) to (r) are explanatory views showing the latter half of the operation procedure of the present invention.

FIG. 4 is an operation explanatory view showing the relationship between the movement of the movable mold in the mold opening direction and the in-mold advancing / retreating part.

FIG. 5 is a perspective view showing a modified example of the takeout mechanism.

6A to 6J are explanatory views showing the first half of the conventional operating procedure.

7 (k) to (r) are explanatory views showing the latter half of the conventional operating procedure.

[Explanation of symbols]

 2 Fixed mold 4 Movable mold 5 Extraction mechanism 5A Gripping part of extraction mechanism 5X In-mold advance / retreat part of extraction mechanism 6 Molded product 8 Detection means 9 Control means L Distance between facing surface of movable mold and fixed mold T Inside of mold Thickness direction of the reciprocating part

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[Procedure amendment]

[Submission date] September 14, 1994

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

A pneumatic equipment and a servomotor (both not shown) are incorporated in a base 5E on which the support 5B is erected, and servomotors 5F and 5G are attached to the support 5B and the arm 5C. ing. Therefore, the arm portion 5C is moved in the X- axis direction by driving the servo motor 5F, and the take-out arm 5D is moved by driving the servo motor 5G.
Move in the Y- axis direction. The arm 5C rotates with respect to the support 5B by driving the servomotor in the base 5E.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuro Shiozaki 11-260 Kugahonmachi, Fushimi-ku, Kyoto-shi, Kyoto Prefecture Yushin Seiki Co., Ltd.

Claims (1)

[Claims] 1. A fixed mold, a movable mold which is provided in the fixed mold so as to move back and forth, and forms an injection molding cavity together with the fixed mold, and the movement start and movement amount of the movable mold are continuous. Detecting means, an ejector for ejecting a molded product that has been molded in the cavity and then held in the movable mold and moved to the mold opening completion position, and a grip for grasping the molded product ejected by the ejector. And a control means for numerically controlling the extraction mechanism, and by moving the movable mold in the mold opening direction, the distance between the facing surfaces of the movable mold and the fixed mold is the same as that of the extraction mechanism. Detecting means for detecting a state in which the size of the in-mold advancing / retreating portion of the mechanism is the same as the thickness direction dimension, and numerical control of the control means based on the detection of the detecting means allows the in-mold advancing / retreating portion to be predetermined in real time Waiting An injection-molded product take-out device, characterized in that it is configured to move forward from a position toward the inside of the mold.