JP2004160759A - Method for unloading molded product and molded product unloading machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for unloading a molded product which unloads a sprue by certainly releasing its retention and unloads to accumulate it almost at a specified spot with improved molding operation efficiency and damage prevention to a molded product part by the contact with a separated sprue part during unloading the latter, and a molded product unloading machine. <P>SOLUTION: This method uses the molded product unloading machine mounted on a resin molding machine with a mold for the molded product to be split apart into the finished product part and the sprue part. The machine has a chuck for a finished product sucking the finished product part and a chuck for a sprue retaining the sprue part and an air injection means. The chuck for a finished product sucks/retains the finished product part and the chuck for a sprue retains the sprue part cut/separated from the finished product part, and both parts are simultaneously unloaded from between the mold halves to specified release positions. When the sprue part retained by the chuck for a sprue is released after releasing the finished product part from its suction by the chuck for a finished product at a release position, a compressed air is injected toward the sprue part from the air injection means to make the sprue part releasable from its retention by the chuck for a sprue. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method and an apparatus for removing a molded product, particularly a molded product removal method suitable for a disc substrate such as a CD, a CD-ROM, a DVD, a DVR, and an MD.
[0002]
[Prior art]
As a method for removing a molded product, particularly a disk-shaped molded product, for example, a disk substrate removal apparatus and a removal method disclosed in Patent Document 1 are known.
[0003]
That is, a cavity is formed between the fixed mold and the movable mold, a stamper for signal transfer is arranged on the fixed mold side of the cavity, a concave gate cut is arranged on the movable mold side, and the molten resin is sprued. And a mold device that is injected into the cavity through the concave gate to injection mold the disk substrate, and performs a gate cut from the movable mold side by the concave gate cut, and the movable mold after the injection molding opens the movable mold. A robot that removes the disk substrate peeled from the fixed die together with the movable die from the movable die, wherein the robot removes the sprue and gate residual resin when holding the disk substrate. An air injection nozzle for discharging the disk substrate to the movable mold side is provided to take out the disk substrate and sprue.
[0004]
[Patent Document 1]
JP-A-2002-240101 (Claims 12 and 13)
[0005]
[Problems to be solved by the invention]
However, in the above-described method of taking out the disk substrate with the disk substrate removing device of Patent Document 1, it is necessary to release the sprue in a state where the disk substrate is sucked and held by the suction cup. Although the air is jetted toward the plate and passes through the center hole to take it out to a predetermined location, there is a problem that the sprue comes into contact with the peripheral edge of the center hole and is damaged when passing through the center hole.
[0006]
In particular, in the case of a disk substrate, since various information and various data such as tracking servo signals are transferred to one surface during molding, the transferred data is destroyed by contact with the sprue, and the disk substrate itself is damaged. There is a risk of becoming defective.
[0007]
Also, when the sprue urged by air passes through the center hole of the disk substrate, the sprue discharge direction is not constant due to contact with the periphery of the center hole, which makes it difficult to accumulate sprue at a certain location. Therefore, there is also a problem that the efficiency of taking out the molded product is deteriorated.
[0008]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks. The object of the present invention is to make sure that the sprue can be released after being released, and that the sprue is collected at a substantially constant location. It is an object of the present invention to provide a molded product removal method and a molded product removal machine that can remove the molded product and improve the molding operation efficiency.
[0009]
Another object of the present invention is to provide a molded product removal method and a molded product removal machine that can avoid contact with the product portion and prevent damage when removing the sprue portion separated from the product portion. is there.
[0010]
[Means for Solving the Problems]
The method for removing a molded product according to the first aspect of the present invention includes a method for removing a product from a molded product removal machine mounted on a resin molding machine having a mold capable of cutting and separating a molded product into a product portion and a sprue portion. Providing a product chuck to be adsorbed, a sprue chuck to hold the sprue part, and an air injection means, the product chuck to suck and hold the product part, and the sprue chuck to hold the sprue part cut and separated from the product part. When the product part and the sprue part are simultaneously taken out from the molds to a predetermined release position, the suction of the product part by the product chuck is released at the release position, and then the release of the sprue part by the sprue chuck is performed. It is characterized in that compressed air is injected from the injection means toward the sprue portion so that the holding by the sprue chuck can be released.
[0011]
Further, the molded product take-out machine according to claim 6 is mounted on a resin molding machine having a mold capable of cutting and separating a molded product into a product part and a sprue part, and opening between the mold and outside the resin molding machine. A movable member that moves between positions, a product chuck that is provided at a distal end portion of the movable member, and a product chuck that sucks a product portion and a sprue chuck that holds a sprue portion, and a sprue portion that is held by the sprue chuck. Air injection means for injecting air, the product part is suction-held by the product chuck and the sprue chuck is held by the sprue part cut and separated from the product part, and the product part and the sprue part are simultaneously separated from the mold by a predetermined amount. After moving to the release position and releasing the suction of the product part by the product chuck at the release position, when releasing the holding of the sprue part by the sprue chuck, a pressure is applied from the air injection means toward the sprue part. Characterized in that a control means for injecting air.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the drawings showing the embodiments.
1 to 3 show an example of a molded product take-out machine 1 embodying the method of the present invention, and a mounting base 3 of the molded product take-out device 1 is fixed to an upper surface of a fixed side platen 5 in a resin molding machine. The movable base 7 is supported by the mounting base 3 so as to move in the axial direction (longitudinal direction) of the resin molding machine.
[0013]
The resin molding machine is not limited to the type of molded product, but the resin molding machine shown is for molding various disk substrates 9 such as CDs, CD-ROMs, and DVDs. Has a center hole 9a. In order to mold the disc substrate 9 having the center hole 9a at the center by this resin molding machine, for example, a movable mold 51 provided with a submarine gate (tunnel gate) and a fixed mold (not shown) are used. The movable mold 51 is provided with a cutter 14a for cutting and separating the molded product into a disk substrate 9 and a sprue portion 12 as product parts after molding, and a sprue portion which is supported so as to protrude in the axial direction into the cutter 14a and cut and separated. The first ejector 14b projects the disk substrate 9, and the second ejector 14c projects the disk substrate 9 held in the movable mold 51.
[0014]
The movable table 7 has a longitudinal axis and is rotatably supported by the mounting base 3. A feed screw having one end connected to an electric motor 10 such as a servomotor is provided on the movable table 7. A reciprocating movement is controlled in the longitudinal direction by a moving mechanism engaged with a nut (neither is shown). The electric motor 10 is provided with a position detector 10a such as a rotary encoder, and detects the moving position of the movable base 7 based on a signal from the position detector 10a.
[0015]
The movable base 7 is provided with an electric motor 11 such as a servo motor having an axis in the longitudinal direction of the resin molding machine, and an output shaft connected to a rotating shaft of the electric motor 11 via a reduction mechanism (not shown). A base end of a swing arm 15 as a movable member is fixed to (not shown). The electric motor 11 is provided with a position detector 11a such as a rotary encoder, and detects the rotation position of the turning arm 15 based on a signal from the position detector 11a.
[0016]
The swivel arm 15 is moved so as to enter and leave between the mold and the operation side (opposite operation side) of the resin molding machine without interfering with the tie bar 13 supporting the movable mounting plate in the resin molding machine. It is formed in the shape of a triangle, for example, by a composite reinforced resin containing carbon fibers.
[0017]
A product chuck 17, a sprue chuck 19, and an air injection unit 21 are provided at the tip of the revolving arm 15. The above-mentioned product chuck 17 is provided on the side of the tip of the revolving arm 15 facing the movable mold parting surface, and is, for example, a horseshoe-shaped provided with a plurality of suction nozzles 17a connected to a negative pressure source (not shown). A (semicircular) manifold member 17b is formed of silicon rubber or the like, and is held in a movable mold so as to adsorb and hold a peripheral edge of a center hole 9a of the disk substrate 9 protruded by a second ejector 14c. And a suction cup 17d having a plurality of suction holes 17c.
[0018]
Note that the product chuck 17 has a structure in which a plurality of suction cups having suction holes are arranged in the circumferential direction on the suction surface side of the horseshoe base, or a structure in which a plurality of suction cups are directly provided on the chuck plate. Is also good.
[0019]
The sprue chuck 19 is provided on the side of the tip of the revolving arm 15 opposite to the fixed mold parting surface. For example, the pair of chuck claws 19a are opened and closed by an operating member 19b such as an air cylinder and separated by the first ejector 14b. The cut and protruded sprue portion 12 is pinched and held.
[0020]
The air injection means 21 is opened in the direction toward the product chuck 17 on the manifold member 17 b, is constituted by an injection port connected to a compressed air generation source (not shown), and has a sprue portion 12 held by the sprue chuck 19. The holding of the sprue portion 12 is forcibly released by injecting compressed air to the center plate 12a.
[0021]
In FIG. 4, a program memory 35 and a work memory 37 are provided in a CPU 33 of the control means 31, respectively. The program memory 35 stores various program data for executing a molded article take-out operation and an air blow operation described later. Further, the working memory 37 stores the movable table 7 in the longitudinal direction of the resin molding machine, that is, the moving position data of the swing arm 15, the standby position data of the swing arm 15, the release position data of the disk substrate 9, the product chuck 17 and the sprue chuck. Various work data such as entry position data for allowing the 19 to enter between the dies is stored.
[0022]
An operation control device 39 is connected to the CPU 33, and the suction control valve 41 of the product chuck 17, the operation valve 43 of the operation member 19b of the sprue chuck 19, and the air injection valve 45 are connected to the operation control device 39, respectively. .
[0023]
The operation controller 39 opens the suction operation valve 41 to hold the disk substrate 9 by the product chuck 17 to open the negative pressure suction system so that the disk substrate 9 can be sucked. When releasing the suction, the suction operation valve 41 is closed to close the negative pressure suction system and release the suction of the disk substrate 9.
[0024]
When the sprue chuck 19 holds the sprue unit 12, the operation control unit 39 opens the operation valve 43 to supply air to the operation member 19 b of the sprue chuck 19 to close the chuck claw 19 a. On the other hand, when the holding of the sprue portion 12 is released, the operation valve 43 is closed to shut off the air supply to the operation member 19b and open the chuck pawl 19a.
[0025]
Further, the operation control device 39 opens the air injection valve 45 at a timing substantially synchronized with the timing at which the compressed air system for the operating member 19b is closed when the holding of the sprue portion 12 by the sprue chuck 19 is released. Is made jettable.
[0026]
The drive control device 47 for the electric motors 10 and 11 is connected to the CPU 33, and the drive control of the electric motors 10 and 11 connected to the drive control device 47 is performed based on the respective position data stored in the work memory 37. The product chuck 17 and the sprue chuck 19 are moved to a position to enter the mold, a position close to the movable mold, a release position of the disk substrate 9 separated from between the molds, and an open position of the sprue portion 12, respectively.
[0027]
Next, a method of removing a molded product by the molded product removal machine 1 will be described.
First, the operation of removing the molded product will be described. When a mold opening completion signal is input from the resin molding machine to the molded product removal machine 1 along with the end of the molding operation, the electric motor 11 is driven to drive the resin molding machine. The swivel arm 15 waiting on the operation side (non-operation side) is rotated to allow the product chuck 17 and the sprue chuck 19 to enter between the opened movable mold 51 and the fixed mold (not shown). After that, as shown in FIG. 5, the electric motor 10 is driven to move the movable table 7, and the product chuck 17 is moved in a direction approaching the parting surface of the movable mold 51, and the molded disk substrate 9 is relatively moved. Let it.
[0028]
Prior to opening the movable mold 51 with respect to the fixed mold, the cutter 14a is moved to the fixed mold side to mold the molded article into the disk substrate 9 and a center located at the center of the disk substrate 9. The plate 12a is cut and separated.
[0029]
Next, as shown in FIG. 6, in the above state, the first ejector 14b in the movable mold 51 is protruded toward the fixed mold, and the sprue portion 12 having the center plate 12a is pushed out to the sprue chuck 19 side. At this timing, the operation member 19b is operated to close the chuck claws 19a, so that the sprue chuck 19 holds the sprue portion 12.
[0030]
Next, the electric motor 10 is driven to rotate in the reverse direction to start moving the movable table 7 to the fixed mold side, and the second ejector 14c is operated at a timing synchronized with the timing of the movement start to be attracted to the product chuck 17. The disk substrate 9 is completely removed from the movable mold 51.
[0031]
At this time, since the center plate 12a of the sprue portion 12 is completely held out of the center hole 9a of the disk substrate 9 held by the product chuck 17 and held by the sprue chuck 19, the disk substrate 9 and the sprue portion 12 are held. Is completely non-interfering.
[0032]
Next, the electric motor 11 is driven to rotate in the reverse direction so that the turning arm 15 is moved to the position where the product chuck 17 holding the disc substrate 9 and the sprue chuck 19 holding the sprue portion 12 are set, for example, to a position before the unloading standby position. When the drive of the electric motor 11 is temporarily stopped when the substrate 9 reaches the product release position and the rotation arm 15 is stopped, the suction state of the disk substrate 9 by the product chuck 17 is released, and the position is returned to the position. The disc is taken out and accumulated in the arranged disc accumulation device (not shown).
[0033]
Next, after the removal of the disk substrate 9 at the above-described product release position is completed, the electric motor 11 is again driven to rotate the turning arm 15 to the removal standby position, and the sprue chuck 19 holding the sprue unit 12 is sprued. Move to the release position and stop. Then, as shown in FIG. 7, at the sprue release position, the operating member 19b is moved back to open the chuck pawl 19a to release the holding of the sprue portion 12, and at this timing, the compressed air is spurted from the air injection means 21. Injecting toward the center plate 12a of the part 12, the sprue part 12 is discharged onto an unloading conveyor or unloading shooter (not shown) arranged at the sprue release position.
[0034]
At this time, since the center plate 12a itself has a larger area on which the compressed air acts than the other sprue portions, the center plate 12a receives the pressure of the injected compressed air efficiently and reliably detaches the sprue portion 12 from the chuck claws 19a. It can be carried out. Further, the discharge direction of the sprue unit 12 can be made substantially constant, and the sprue unit 12 can be efficiently accumulated at the sprue release position.
[0035]
The method of taking out a molded product according to the present embodiment is to make sure that the holding of the sprue portion 12 by the sprue chuck 19 is released, and that the sprue portion 12 is discharged to a predetermined sprue release position to accumulate and efficiently carry out the taking-out operation. Can be.
[0036]
In the above description, the product part of the molded product to be taken out is referred to as the disk substrate 9, and the sprue portion 12 having the center plate 12 a cut and separated from the center hole 9 a of the disk substrate 9 together with the disk substrate 9 is simultaneously taken out. 12, in particular, the method of injecting compressed air to the center plate 12a to eject the sprue portion 12 reliably and at a predetermined location and taking out the sprue portion 12 is the present invention. The present invention is not limited to the above, and any other technical matter may be used as long as it is a technical matter that, when releasing the holding of the sprue portion, injects air to the sprue portion to ensure release of the holding and stabilize the release direction. It is included in the technical range of.
[0037]
At this time, the sprue portion may be one without a center plate having a wide air receiving surface. In this case, the product portion that has been gate-cut into the product chuck 17 as shown in FIG. In the held state, the compressed air is jetted from the air jetting member 21 to the shaft-shaped portion 12b of the sprue portion 12 to discharge the sprue portion 12 downward, thereby ensuring that the holding of the sprue portion is released and changing the discharge direction. What is necessary is just to make it constant.
[0038]
In the above description, the method of the present invention has been described by using the molded product unloading machine 1 for revolving the swivel arm 15 to move the product chuck 17 and the sprue chuck 19 into and out of the space between the dies to remove the molded product. The molded product take-out machine embodying the present invention is not limited to the swivel-shaped molded product take-out machine. For example, the product chuck 17 and the sprue chuck 19 may be provided in the longitudinal direction and the longitudinal orthogonal direction of the resin molding machine. And a three-axis type molded product take-out machine that takes out a molded product by controlling the movement in the three-dimensional vertical direction and a two-axis type that takes out the molded product by controlling the movement in two-dimensional directions of the longitudinal direction and the direction orthogonal to the longitudinal direction of the resin molding machine. The method of the present invention can be applied to a molded product removal machine of a type.
[0039]
The air injection means 21 described above has a structure in which the compressed air is injected from the injection port provided in the manifold member 17b toward the center plate 12a of the sprue portion 12. A structure may be used in which compressed air is jetted toward the center plate 12a and the shaft-shaped portion 12b of the sprue portion 12 as a separate member from the member 17b.
[0040]
In the above description, the product chuck 17 and the sprue chuck 19 are directly provided at the tip of the turning arm 15. A structure may be used in which the mounting is performed via a conventionally known inversion posture control member. In this case, in particular, when releasing the holding of the disk substrate 9 which is a product, the flat surface of the disk substrate can be taken out so as to coincide with the mounting surface at the product release position.
[0041]
【The invention's effect】
ADVANTAGE OF THE INVENTION This invention can hold | release a sprue reliably, can take it out, and can take out so that a sprue may be integrated in a substantially fixed place, and can improve molding operation efficiency. Further, when removing the sprue part separated from the product part, it is possible to avoid contact with the product part and prevent damage.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a molded product take-out machine embodying the method of the present invention.
FIG. 2 is an exploded perspective view of a tip portion of a swing arm.
FIG. 3 is a vertical sectional view of a chuck.
FIG. 4 is an electrical block diagram schematically showing a control unit.
FIG. 5 is an explanatory diagram showing a state in which a disk substrate is held in a movable mold.
FIG. 6 is an explanatory diagram illustrating a holding state of a sprue unit.
FIG. 7 is an explanatory diagram showing a holding release state of the sprue unit.
FIG. 8 is an explanatory diagram of a modified embodiment.
[Explanation of symbols]
1-article removal machine, 9-disk substrate as product part of molded article, 9a-center hole, 12-sprue part, 12a-center plate, 15-slewing arm as movable member, 17-product chuck, 19 -Chuck for sprue, 21-Air injection means

Claims (7)

A product pick-up machine mounted on a resin molding machine equipped with a mold that can cut and separate the molded product into a product part and a sprue part, a product chuck that adsorbs the product part, and a sprue chuck that holds the sprue part And the air injection means, the product part is sucked and held by the product chuck, and the sprue chuck is held by the sprue part cut and separated from the product part, and the product part and the sprue part are simultaneously released from the mold by a predetermined release. At the release position, when releasing the holding of the sprue part by the sprue chuck after releasing the suction of the product part by the product chuck at the release position, injecting compressed air from the air injection means toward the sprue part. A method for removing molded products that enables release from holding by the sprue chuck. 2. A method according to claim 1, wherein said air jetting means jets air toward the flat portion of the sprue portion and discharges the air in a substantially constant direction. 2. The molded product according to claim 1, comprising a disk substrate having a center hole in the center and a sprue portion having a center plate cut and separated from the center hole, wherein the product chuck and the sprue chuck are the disk substrate and the sprue. A method for removing a molded product that holds the part in a non-interfering state. 4. The method according to claim 3, wherein the air jetting means jets air toward the center plate of the sprue portion to make the holding release direction substantially constant. 2. The method according to claim 1, wherein the sprue portion is cut and separated from the product portion in accordance with the protrusion by an ejector mechanism incorporated in the mold. A movable member that is mounted on a resin molding machine having a mold that can cut and separate the molded product into a product part and a sprue part and that moves between the molds and between open positions outside the resin molding machine; A product chuck provided at the tip end, a product chuck for adsorbing the product part and a sprue chuck for holding the sprue part, air injection means for injecting air toward the sprue part held by the sprue chuck, and a product chuck. The product part and the sprue part are simultaneously moved from the mold to a predetermined release position while holding the sprue part cut and separated from the product part by the sprue chuck while holding the product part by suction, and the product is placed at the release position. Control means for injecting compressed air from the air injection means toward the sprue part when releasing the holding of the sprue part by the sprue chuck after releasing the suction of the product part by the chuck for The molded product take-out machine. The molded product is mounted on a resin molding machine equipped with a mold that cuts and separates the molded product into a disk substrate with a center hole at the center and a sprue with a center plate extracted from the center hole by an ejector mechanism. Arm that reciprocates between a swing position and a release position outside the resin molding machine, a product chuck that is provided at the tip of the swing arm, and a product chuck that sucks a disk substrate, a sprue chuck that holds a sprue unit, and a sprue chuck Air spouting means for injecting air toward the center plate of the sprue part held in, and the sprue chuck holding the sprue part cut and separated from the disc substrate by sucking and holding the disc substrate on the product chuck. The disk substrate and the sprue part are simultaneously moved to a predetermined release position from between the dies, and the disk chuck is moved by the product chuck at the release position. When releasing the holding of the sprue portion by sprue chuck after releasing the deposited molded article take-out machine and a control means for injecting compressed air toward the air ejection means to center plate sprue portion.

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