JP4980384B2 - Injection molding correction system - Google Patents

Description

  The present invention relates to a system for correcting the shape and dimensions of an injection molded resin part. More specifically, the correction level can be appropriately selected according to the composition of resin raw materials, physical properties, molding conditions, and the like. In addition, the present invention relates to a technique for improving the accuracy of the shape and dimensions of resin parts by enabling the corrective jig to be reliably set in accordance with the selected correction level.

Conventionally, injection molding is used to manufacture resin parts. However, deformation of a high-temperature resin part taken out from a molding die, such as warping and twisting, occurs during the cooling process.
For this reason, it is necessary to perform a straightening operation in which the high-temperature resin component taken out from the molding die is cooled while being fixed to the straightening jig.

  At this time, the following Patent Document 1 describes an apparatus for automatically performing a series of operations for fixing a high-temperature resin part to a correction jig and releasing the cooled resin part from the correction jig. ing.

Japanese Utility Model Publication No. 7-12220

By the way, the magnitude of deformation that occurs in the cooling process of a high-temperature resin part taken out from a molding die changes with changes in the composition, physical properties, or molding conditions of the resin raw material used for injection molding.
As a result, in order to achieve the final shape and dimensional accuracy required for the resin parts, the correction level must be changed in accordance with the composition of the raw material of the resin, the physical property values, or variations in molding conditions. .

Specifically, in the case of a resin part that twists in the plus direction when cooled in a state where it is not restrained by the correction jig, the twist angle is set to, for example, minus one degree with respect to the final shape under certain molding conditions. A high-temperature resin part is fixed and cooled on the correction jig, and the other high-temperature resin parts are fixed and cooled on a correction jig set at a twist angle of minus 2 degrees, for example, under other molding conditions.
As a result, after releasing the cooled resin part from the correction jig, the final shape and dimensional accuracy required for the resin part can be achieved.

However, the operation of appropriately selecting the correction level in accordance with the composition of the raw material of the resin, the physical property value, the variation of the molding conditions, etc. requires a highly skilled worker.
Moreover, when using many correction jigs according to the production amount of resin parts, it is complicated to change the settings of many correction jigs one by one according to the selected correction level. There is also a possibility that the setting may vary.

  Accordingly, an object of the present invention is to not only be able to select an appropriate correction level according to the composition of the resin raw materials, physical properties, or variations in molding conditions, but also to reliably set the correction jig in accordance with the selected correction level. An object of the present invention is to provide a correction system for an injection molded product.

Means described in claim 1 and claim 2 for solving the above-mentioned problems are as follows:
A system for correcting the shape and dimensions of the resin component by cooling in a state where a high-temperature resin component injection-molded by an injection molding device is fixed to the correction device,
The straightening device is
First fixing means for holding and fixing the first portion of the resin component;
A second fixing means for holding and fixing the second portion of the resin component, which is supported so as to be changeable in relative position with respect to the first fixing means;
Drive means for driving and displacing the second fixing means in order to change the relative position of the second fixing means with respect to the first fixing means.
The relative positions of the first and second fixing means are relative positions in the front, rear, left, right, and up and down directions when the longitudinal direction of the resin component fixed to the correction device is the front and rear direction, or an axis extending in the front and rear direction. Means a relative angle around and even a combination thereof.

That is, in the correction system for an injection molded product according to claim 1 and claim 2 , the relative position between the first fixing means and the second fixing means in the correction apparatus can be freely changed using the driving means. Can do.
As a result, when the injection-molded high-temperature resin part is fixed to the straightening device and cooled, the resin raw material used for injection molding of the resin part has a composition or physical property value or a change in molding conditions in the injection molding apparatus. The correct position of the first fixing means and the second fixing means, and hence the correction level applied to the high-temperature resin part, is appropriately changed, and the final shape and dimensional accuracy required for the resin part Can be achieved reliably.

The means described in claim 1 further includes first control means for controlling the operation of the driving means.
And this 1st control means has a 1st selection means which selects the relative position of the said 2nd fixing means with respect to the said 1st fixing means according to the injection molding conditions obtained from the said injection molding apparatus. The operation of the driving means is controlled to displace the second fixing means to the relative position selected by the first selecting means.
The first selection means has a relationship between the relative position of the second fixing means with respect to the first fixing means and injection molding conditions such as injection speed, injection pressure, holding pressure, resin temperature, mold temperature, and the like. It can be stored as a two-dimensional or three-dimensional map.

That is, in the correction system for an injection molded product according to claim 1 , the first selection means is configured such that the second fixing means is relative to the first fixing means in accordance with the injection molding conditions obtained from the injection molding apparatus. Select the position appropriately.
Thereby, since the highly skilled worker is not required, an optimal correction level can be selected using an inexperienced worker or a manufacturing robot.
Since the first control means controls the operation of the driving means, the second fixing means can be displaced to the optimum relative position in accordance with the selected correction level. It becomes possible to reliably manufacture resin parts having dimensional accuracy.

The means described in claim 2 further comprises second control means for controlling the operation of the drive means.
The second control means has second selection means for selecting the relative position of the second fixing means with respect to the first fixing means in accordance with the composition and physical property values of the resin raw material used for injection molding. Then, the operation of the driving means is controlled so as to displace the second fixing means to the relative position selected by the second selecting means.
Note that the second selection means includes a relative position of the second fixing means with respect to the first fixing means, and various compositions such as the composition and physical properties of the resin raw material used for injection molding, such as the amount of a specific component and melt viscosity. The relationship with the physical property value can be held as a two-dimensional or three-dimensional map.

That is, in the correction system for an injection-molded article according to claim 2 , the second selection means has the second fixing means for the first fixing means according to the composition of the resin raw material used for injection molding and the fluctuation of the physical property value. Choose the optimal relative position of the fixing means and thus the optimal correction level.
Since the second control means controls the operation of the driving means, the second fixing means can be displaced to the optimum relative position according to the selected correction level, so that high shape accuracy and high It becomes possible to reliably manufacture resin parts having dimensional accuracy.

According to a third aspect of the present invention, there is provided a correction system for an injection molded product according to the first or second aspect , wherein the driving means includes a movable part constituting the second fixing means and a stationary state of the system. It is a motor interposed between the parts.
That is, in the correction system for an injection molded product according to claim 3 , the relative position of the second fixing means with respect to the first fixing means is easily and automatically set by operating the motor as the driving means. It becomes possible to do.

According to a fourth aspect of the present invention, there is provided the injection molding product correction system according to the third aspect , wherein the driving means is movable in each of the plurality of second fixing means in the plurality of correction devices arranged in parallel. It has the link mechanism which connects a part integrally, It is characterized by the above-mentioned.
That is, the correction system for an injection molded product according to claim 4 uses a plurality of correction devices, and the movable parts of the second fixing means in these correction devices are integrally connected to each other by a link mechanism. Therefore, the relative position of the second fixing means with respect to the first fixing means can be set easily and accurately.

According to a fifth aspect of the present invention , in the injection molding product correction system according to any one of the first to fourth aspects, the first and second fixing means have the longitudinal direction in the front-rear direction. A sandwiching portion for sandwiching the resin component in the left-right direction, a support portion for supporting the resin component from below, and the operation of the sandwiching portion and the support portion are controlled so that the operation is controlled by the control means. And a first drive portion.
That is, in the correction system for an injection molded product according to claim 5 , each clamping part and each supporting part constituting the first and second fixing means are driven by the first and second driving parts, respectively. Therefore, the operation of receiving and fixing the high-temperature resin parts taken out by the robot from the molding die of the injection molding apparatus to the first and second fixing means and the operation of releasing after cooling are automatically performed. Can be performed.

According to a sixth aspect of the present invention , in the injection molding product correction system according to the fifth aspect , the clamping portion of the first and second fixing means penetrates the resin part in the left-right direction. It has a pin which is inserted in the through hole so as to be freely inserted and removed, and prevents contraction of the through hole during cooling.
That is, in the injection molding product correction system according to the sixth aspect , since the resin part is cooled in a state in which the pin is inserted into the through hole penetrating the resin part in the left-right direction, Can be reliably prevented from shrinking and resulting in defective dimensions.

According to a seventh aspect of the present invention , in the injection molding product correction system according to any one of the first to sixth aspects, the correction device is fixedly disposed adjacent to the injection molding device. It is characterized by.
That is, in the correction system for an injection molded product according to the seventh aspect , the correction device is disposed on a conveyor, work table or the like adjacent to the injection molding device.
Thereby, in the case of a resin part that takes time to correct, a large number of correction devices can be arranged on a conveyor, a work table or the like, and the resin part can be corrected efficiently.

Further, according to an eighth aspect of the present invention, in the correction system for an injection molded product according to any one of the first to sixth aspects , the correction device is a robot for taking out the resin component from the injection molding device. It is supported and configured to reciprocate between a position for receiving the resin component from a mold of the injection molding apparatus and a position for discharging the resin component.
That is, the correction system for an injection molded product according to claim 8 uses the time until the resin component is discharged to a predetermined position after receiving the resin component extruded from the mold of the injection molding apparatus. It corrects parts.
Thereby, in the case of a resin part that does not take a long time to correct, the resin part can be corrected efficiently in accordance with the injection molding cycle.

  According to the present invention, not only can the correction level be appropriately selected according to the composition of the raw material of the resin, the physical property value or the variation in the molding conditions, etc., but the corrective jig is accurately set according to the selected correction level, It is possible to provide a correction system for an injection molded product capable of manufacturing a resin part having a high accuracy in shape and size.

  Hereinafter, with reference to FIGS. 1-9, each embodiment and modification of the correction system of the injection molded product which concerns on this invention are described in detail. In the following description, the same reference numerals are used for the same parts, and redundant descriptions are omitted.

First Embodiment First, referring to FIGS. 1 to 5, the correction system for an injection molded product according to the first embodiment will be described. The correction system 100 is a resin component that constitutes a part of a wiper of an automobile. It is used to correct 10 shapes and dimensions.

This resin component 10 is injection-molded using, for example, a resin material such as PBT or PET containing glass fiber, and has a first portion 11 on the distal end side and a second portion 12 on the proximal end side. However, it extends along the longitudinal direction (front-rear direction) between the first and second portions 11 and 12 in the process of natural cooling from the high temperature state immediately after being injection molded and taken out from the mold. Twist around the axis L is likely to occur.
Further, for assembling to other parts constituting the wiper, the first and second parts 11 and 12 are dimensioned and shaped in the width direction (left and right direction), and the first and second parts 11 and 12 are provided. High dimensional accuracy and shape accuracy are required for the inner diameter size and shape of the through-holes (not shown) that extend through in the left-right direction.

Therefore, the correction system 100 corrects the shape and dimensions of the resin component 10 by naturally cooling the resin component 10 while holding and fixing the first and second portions 11 and 12 of the resin component 10, respectively. The final shape accuracy and dimensional accuracy required for the resin component 10 are achieved.
Therefore, the correction system 100 includes first and second fixing means 20 and 30 for holding and fixing the first and second portions 11 and 12 of the resin component 10, respectively.

The first fixing means 20 is for holding and fixing the first portion 11 of the resin component 10 in the width direction (left-right direction), and has a stationary block 21 and a movable block 22.
The stationary block 21 is fixed to a body portion (not shown) of the correction system 100, and the side surface that is in close contact with the first portion 11 extends in the vertical direction.
The movable block 22 is supported by the piston rod 23a of the air cylinder 23 fixed to the main body portion, and can move forward and backward in the width direction with respect to the stationary block 21, and the side surface in close contact with the first portion 11 extends in the vertical direction. ing.
Further, the movable block 22 is provided with a pin 24 that is inserted into a through hole 11a (see FIG. 5) that extends through the first portion 11 of the resin component 10 in the width direction.
The outer diameter of the pin 24 is set to a value that takes into account the shrinkage rate of the resin material used as a raw material with respect to the target value of the inner diameter of the through hole 11a of the completed resin component 10.

Accordingly, when the movable block 22 is advanced by the air cylinder 23, the first portion 11 of the resin component 10 is sandwiched and fixed in the width direction as shown in FIG. 1, and the pin 24 is inserted into the through hole 11a. Can be inserted.
On the other hand, when the movable block 22 is moved backward by the air cylinder 23, the holding of the first portion 11 in the width direction is released, the pin 24 is pulled out, and the new resin component 10 is removed as shown in FIG. The first portion 11 can be received from above, and the second portion 12 of the resin component 10 that has been cooled can be dropped downward.

The second fixing means 30 is for fixing the second portion 12 of the resin component 10 by sandwiching it in the width direction, and has a stationary block 31 and a movable block 32.
The stationary block 31 is fixed to a rocking body 41 described below, and the angle θ (see FIG. 3) with respect to the vertical direction of the side surface in close contact with the second portion 12 changes according to the rocking of the rocking body 41.
Movable block 32 can freely separable to stationary block 31 is supported on the piston rod 33a by the air cylinder 33 fixed to the rocking member 41, sides in close contact with the second portion 12 is above the stationary block 31 Parallel to the side.
Further, the movable block 32 is provided with a pin 34 protruding from the through hole 12a (see FIG. 5) extending through the second portion 12 of the resin component 10 in the width direction.
The outer diameter of the pin 34 is set to a value that takes into account the shrinkage rate of the resin material used as a raw material with respect to the target value of the through hole 12a of the completed resin component 10.

Thus, when the movable block 32 is advanced by the air cylinder 33, the second portion 12 of the resin component 10 is sandwiched and fixed in the width direction as shown in FIG. 1, and the pin 34 is inserted into the through hole 12a. Can be inserted.
On the other hand, when the movable block 32 is moved backward by the air cylinder 33, the holding of the second portion 12 in the width direction is released, the pin 34 is pulled out, and the new resin component 10 is removed as shown in FIG. The second portion 12 can be received from above, and the second portion 12 of the resin component 10 that has been cooled can be dropped downward.

The oscillating body (movable part) 41 can adjust the relative angle around the axis L of the second fixing means 30 with respect to the first fixing means 20, and the oscillating shaft 42 is coaxial with the axis L of the resin component 10. have.
Then, the swing shaft 42 is inserted into the stationary portion 43 fixed to the main body portion of the correction system 100, so that the swing body 41 can swing around the axis L.
As a result, as shown in FIG. 3, by changing the value of the swing angle θ of the swinging body 41 with respect to the stationary portion 43, the second fixing means 30 relative to the first fixing means 20 around the axis L is changed. The angle and thus the level of correction of twist about the axis L of the second part 12 relative to the first part 11 of the resin part 10 can be adjusted.

As shown in FIG. 3, a step motor 51 of the swinging means 50 is fixed to the stationary part 43 in order to change the value of the swinging angle θ of the swinging body 41 with respect to the stationary part 43.
A screw nut 45 supported by a support arm 44 projecting from the lower surface of the rocking body 41 is screwed onto the screw shaft 52 that is rotationally driven by the step motor 51.
Thereby, when the screw shaft 52 is rotationally driven in both the forward and reverse directions using the step motor 51, the swinging body 41 freely swings clockwise / counterclockwise around the swing shaft 42 (axis line L). The relative angle around the axis L of the second fixing means 30 with respect to the first fixing means 20 can be freely adjusted.

On the other hand, below the first fixing means 20, a first support means 60 for supporting the first portion 11 of the resin component 10 from below is disposed.
The first support means 60 has a movable block 61 that can move forward and backward in the width direction (left-right direction) of the resin component 10 below the first portion 11.
The movable block 61 is connected to the piston rod 62a of the air cylinder 62 and can advance and retreat in the width direction. The movable block 61 advances to the lower side of the first portion 11 as shown in FIG. As shown in FIG. 5, it is possible to take a state where the first part 11 is retracted from the first part 11 in the width direction and the first part 11 can be dropped downward.

Similarly, second support means 70 for supporting the second portion 12 of the resin component 10 from below is disposed below the second fixing means 30 in the oscillator 41.
The second support means 70 has a movable block 71 that can be moved back and forth in the width direction (left-right direction) of the resin component 10.
The movable block 71 is connected to the piston rod 72a of the air cylinder 72 and can advance and retreat in the width direction. The movable block 71 advances to the lower side of the second portion 12 as shown in FIG. As shown in FIG. 5, it is possible to take a state in which the second part 12 is retracted from the second part 12 in the width direction and the second part 12 can be dropped downward.

  On the other hand, the correction system 100 of the first embodiment includes the air cylinders 23 and 33 in the first and second fixing means 20 and 30 described above, the step motor 51 of the swinging means 50, and the first and second support means. Control means C for controlling the operation of the air cylinders 62 and 72 of 60 and 70 is provided.

This control means C sets the molding from the selection of the correction level (oscillation angle θ) of the injection molded resin part 10 to the selected oscillation angle θ of the oscillator 41 (second fixing means 30), and molding. The flow of a series of operations from receiving the high-temperature resin component 10 taken out from the mold by the robot, holding and fixing the resin component 10, and releasing the resin component 10 after cooling is controlled.
At this time, information relating to molding conditions is input to the control means C from the injection molding apparatus I to the first selection means, and information relating to the composition and physical property values of the resin raw material is input from the material discrimination apparatus M to the second selection means. It is supposed to be.

The first selection means selects the value of the correction level (oscillation angle θ) of the resin component 10 based on the information regarding the molding conditions input from the injection molding apparatus I, and the horizontal axis indicates various molding conditions. There is a built-in map that takes the value and the correction level on the vertical axis.
This map is a two-dimensional or three-dimensional map in which values of various molding conditions such as injection speed, injection pressure, holding pressure, resin temperature, mold temperature and the like are associated with correction level values.
Although this map is composed of a plurality of maps, a plurality of correction level values obtained from these maps are respectively weighted and added to finally determine one correction level value. Can do.

The second selecting means selects the value of the correction level (swing angle θ) of the resin component 10 based on the information on the composition or physical property value of the resin raw material input from the material discrimination device M. A map that takes the ratio and physical property values of each component constituting the resin raw material and takes the correction level value on the vertical axis is incorporated.
This map is a two-dimensional or three-dimensional map in which each ratio of various components constituting the resin raw material or various physical property values and values of correction levels are associated with each other. A plurality of correction level values obtained from these maps are respectively weighted and added to finally determine one correction level value.
The material discriminating device M is the ratio of each component or various physical properties described in the data sheet provided by the resin raw material manufacturer, or the result of analysis by the quality control personnel using the in-house testing device. Alternatively, it may be configured to manually input to a computer.

The control means C is a correction level (oscillation angle θ) selected by the first selection means based on the molding conditions, and a correction level selected by the second selection means based on the composition or physical property value of the resin raw material. Based on the value of (swing angle θ), the final value of the correction level of the resin component 10 is determined.
Then, based on the finally determined correction level value, the operation of the step motor 51 of the swinging means 50 is controlled, and the swing angle θ of the swinging body 41 (second fixing means 30) is finally determined. To match the swing angle θ.

Next, as shown in FIG. 2, the control means C controls the operation of the air cylinders 62 and 72 of the first and second support means 60 and 70 to advance the movable blocks 61 and 71, respectively. The high temperature resin component 10 taken out from the molding die is received from below.
When it is detected that the first and second portions 11 and 12 of the resin component 10 are placed on the movable blocks 61 and 71, respectively, the air cylinders 23 of the first and second fixing means 20 and 30 are detected. , 33 are controlled to move the movable blocks 22 and 32 forward and hold and fix the first and second portions 11 and 12 of the resin component 10 as shown in FIG.

At this time, the stationary block 31 and the movable block 32 of the second fixing means 30 are inclined at an angle θ with respect to that of the first fixing means.
Thereby, the high-temperature resin component 10 is fixed in a state twisted at an optimal correction level (swing angle θ) between the first and second fixing means 20 and 30 and naturally cooled.

When natural cooling of the resin component 10 is completed, the control means C controls the operation of the air cylinders 23 and 33 of the first and second fixing means 20 and 30 to retract the movable blocks 22 and 32 in the width direction, As shown in FIG. 4, the fixing of the first and second portions 11 and 12 of the resin component 10 is released.
Next, the control means C controls the operation of the air cylinders 62 and 72 of the first and second support means 60 and 70, respectively, and retracts the movable blocks 61 and 71 in the width direction as shown in FIG. The part 10 is dropped.

Thereby, the correction of the warp or twist generated in the cooling process is completed, and the final shape and dimensional accuracy required for the entire resin component 10 can be reliably achieved.
Further, since the resin component 10 is cooled in a state where the pins 24 and 34 are inserted into the through holes 11a and 12a respectively formed through the first and second portions 11 and 12 of the resin component 10, the through holes The final shape and dimensional accuracy required for 11a and 12a can be reliably achieved.
The completion of the natural cooling of the resin component 10 can be confirmed by a timer that the time set in advance by the control means C has elapsed or by detecting the temperature of each part of the resin component 10.

Modified Example Next, with reference to FIG. 6 and FIG. 7, a modified example of the injection molded product correction system 100 according to the first embodiment will be described.

In the correction system 100 of the first embodiment described above, as shown in FIGS. 1 and 2, the first portion 11 having a narrow width of the elongated resin component 10 is sandwiched by the first fixing means 20 and the second fixing device 20 is used. The second support means 70 supports the second portion 12 with the second fixing means 30 from below while being supported by the second support means 60 from below.
In other words, the first portion 11 having a narrow width is fixed in the resin component 10 and the second portion 12 having a wide width is corrected by twisting around the axis L.

On the other hand, as shown in FIGS. 6 and 7, the correction system 110 for the injection molded product according to the present modified example uses the first fixing means 20 to attach the wide second portion 12 of the elongated resin component 10. While being sandwiched, supported by the second support means 60 from below, the first portion 11 having a narrow width is supported by the second support means 70 from below while being sandwiched by the second fixing means 30. Yes.
In other words, it has a structure in which the second portion 12 having a large width in the resin component 10 is fixed, and the first portion 11 having a small width is corrected by twisting around the axis L.

  That is, when the resin component 10 is corrected by twisting around the axis L, the width is narrower and the torsional rigidity is larger than twisting the second portion 12 having a large width and high torsional rigidity. It has been found that twisting the first portion 11 having a low height increases the straightening efficiency, and the straightening operation can be completed in a shorter time.

Therefore, the correction system 110 of the present modification includes the pin 24 provided in the first fixing means 20, the pin 34 provided in the second fixing means 30, and the first in the correction system 100 of the first embodiment. The dimensions of the movable block 61 of the support means 60 and the movable block 71 of the second support means 70 are changed in accordance with the first and second portions 11 and 12 of the resin component 10, respectively.
Note that the operation of each part of the correction system 110 of the present modification is the same as the operation of each part of the correction system 100 of the first embodiment, and it goes without saying that the effects obtained therefrom are also the same.

Second Embodiment Next, with reference to FIG. 8, a correction system for an injection molded product according to a second embodiment will be described. The correction system 200 has a structure capable of correcting two resin parts 10 simultaneously.
The correction system 200 has a structure in which the two correction systems 100 of the first embodiment described above are arranged side by side, and includes a pair of oscillating bodies 81-1 and 81-2 and the structure of the oscillating means 50. However, since the structure of the other parts is the same, the changed part will be described below.

As shown in FIG. 8, the structure of the pair of oscillating bodies 81-1 and 81-2 is substantially the same as that of the oscillating body 41 in the first embodiment, and an oscillating shaft 82 coaxial with the axis L of the resin component 10 is provided. Have.
Then, the swinging shafts 82-1 and 82-2 are inserted into the stationary portion 83 fixed to the main body portion of the correction system 200, respectively, and the pair of swinging bodies 81-1 and 81-2 are respectively moved along the axis L. It can swing around.

At this time, a nut 85 is provided on the support arm 84 projecting from the lower surface of the rocking body 81-2 on the right side of the figure, and the right end of the connection link 53 is pivotally supported at the lower end thereof. Has been.
Further, the left end of the connection link 53 is pivotally supported at the lower end of the support arm 86 projecting from the lower surface of the swing body 81-1 on the left side of the figure.
As a result, when the screw shaft 52 is rotationally driven in both the forward and reverse directions using the step motor 51, the pair of oscillating bodies 81-1 and 81-2 are rotated around the oscillating shafts 82-1 and 82-2 (axis L). To freely swing clockwise / counterclockwise.
Therefore, according to the correction system 200 of the second embodiment, the two resin components 10 can be corrected simultaneously and at the same correction level.

In addition, in the correction system 200 of 2nd Embodiment mentioned above, it has the structure which corrects two resin components simultaneously, However, It can also change so that more resin components 10 can be corrected sequentially.
For example, in the case of using a two-piece injection mold, a correction system having a structure in which three sets of the correction systems 200 described above are arranged in parallel and the rocking bodies 81-1 to 81-6 are integrally swung is used. At this time, the resin parts 10-1 and 10-2 injection-molded in the first shot are taken out by the robot, fixed to the portions corresponding to the rocking bodies 81-1 and 81-2, and naturally cooled. Next, the resin parts 10-3 and 10-4 which are injection-molded in the second shot are taken out by a robot, fixed to portions corresponding to the swinging bodies 81-3 and 81-4, and naturally cooled. Further, the resin parts 10-5 and 10-6 injection-molded in the third shot are taken out by a robot, fixed to the portions corresponding to the swinging bodies 81-5 and 81-6, and naturally cooled.
When a predetermined cooling period has elapsed, the control means C releases the resin parts 10-1 and 10-2 fixed to the portions corresponding to the oscillators 81-1 and 81-2 and takes them out as finished products. . Next, the resin parts 10-7 and 10-8 that are injection-molded in the fourth shot are fixed to portions corresponding to the swinging bodies 81-1 and 81-2.
Thereafter, by repeating the same procedure, the operations of taking out, fixing, naturally cooling, and releasing the injection molded resin parts are executed as a series of cycles.

In such a correction system, while the correction level (swing angle θ) is set small, the injection-molded resin part 10 is fixed and allowed to cool naturally for a long time corresponding to a three-shot injection molding cycle at the longest. Can do.
Accordingly, the correction accuracy of the resin component 10 is higher than that of a correction system in which the correction level (swing angle θ) is set large and the resin component 10 is fixed and naturally cooled for a short time corresponding to a one-shot injection molding cycle. Thus, it is possible to obtain the resin component 10 having excellent dimensional and shape accuracy.
At this time, since each oscillating body 81-1 to 81-6 is connected by the connection link 53 and oscillates integrally, the value of the oscillating angle θ is the same, and each oscillating body 81-1 to 81-6. It is possible to keep the correction accuracy in the portion corresponding to the above constant.
Further, even when it is necessary to change the correction level due to a change in the composition of the resin raw material, etc., the swing angle of each of the swinging bodies 81-1 to 81-6 can be adjusted quickly and accurately to correct the correction. The level can be changed quickly.

Third Embodiment Next, an injection molding product correction system according to a third embodiment will be described with reference to FIG.

The above-described correction systems 100 and 200 for the injection molded products according to the first and second embodiments are suitable for use in resin parts that need to be corrected over a relatively long time.
On the other hand, the correction system 300 for an injection molded product according to the third embodiment is suitable for use in a resin component that can be corrected in a short time.
Therefore, this correction system 300 is held by a robot that takes out an injection-molded resin part from a mold, and releases the position where the resin part 10 is received from the mold of the injection molding apparatus and the resin part 10 that has been corrected. It is configured to reciprocate between a predetermined position.

  More specifically, the correction system 300 according to the third embodiment includes a pair of left and right resin components on a product chuck plate 92 having an engagement portion 91 that is detachably engaged with a robot-side one-touch chuck. Two first and second fixing means 93 and 94 for holding and fixing the portions 11 and 12 of 10L and 10R, respectively, are provided.

The first fixing means 93 is for holding and fixing the wide second portion 12 of the resin component 10 in the width direction, and has a pair of holding blocks 93a and 93b.
These sandwiching blocks 93a and 93b are driven by an air cylinder 93c fixed on the product chuck plate 92 to receive the second part 12 while being separated from each other, and the second part being close to each other. 12 can be taken.

The second fixing means 94 is for holding and fixing the narrow first portion 11 of the resin component 10 in the width direction, and has a pair of holding blocks 94a and 94b.
These sandwiching blocks 94a and 94b are driven by an air cylinder 94c fixed on the product chuck plate 92 to receive the first part 11 while being separated from each other, and the first part being close to each other. 11 can be taken.

The second fixing means 94 is fixed on a pair of oscillating bodies 95, 95 that are supported on the product chuck plate 92 so as to freely oscillate.
These oscillating bodies 95 are for adjusting the relative angle between the first fixing means 93 and the second fixing means 94 around the longitudinal axis L of the resin component 10. A swing shaft 97 inserted through the stationary portion 96 is supported so as to be swingable about the axis L.
The swing shaft 97 is connected to a speed reducer 98 and a step motor 99 fixed to the stationary portion 96.
As a result, the swinging body 95 is driven by the speed reducer 98 and the step motor 99 and can freely adjust the swinging angle around the axis L, so that the second fixing means 94 with respect to the first fixing means 93 can be adjusted. The relative angle around the axis L, and thus the twist angle of the first portion 11 with respect to the second portion 12 of the resin component 10 can be freely adjusted.

  Further, the operations of the air cylinder 93c of the first fixing means 93, the air cylinder 94c of the second fixing means 94, and the step motor 99 that swings the swinging body 95 are controlled by the control means C, respectively. Since the control content is the same as that of the correction system 100 of the first embodiment described above, the description thereof is omitted.

When the injection molded resin part 10 is corrected using the correction system 300 of the third embodiment, first, the robot is operated, and the male and female molds of the opened injection mold are opened. In the meantime, the product chuck plate 92 is moved.
When the pair of injection molded resin parts 10 are respectively extruded from the injection mold by the ejector pins, the first part 11 and the second part 12 of the resin parts 10 are the first and second parts. The fixing means 93 and 94 are respectively inserted between the holding blocks 93a, 93b, 94a and 94b which are separated from each other.
Next, when the air cylinders 93c, 94c of the first and second fixing means 93, 94 are actuated, the first part 11 and the second part 12 of the resin component 10 are changed into the first and second fixing means 93, It is clamped and fixed by 94 clamping blocks 93a, 93b, 94a, 94b, respectively.

At this time, the control means C is selected by the second selection means based on the correction level (swing angle θ) selected by the first selection means based on the molding conditions and the composition or physical property value of the resin raw material. Based on the value of the corrected level (swing angle θ), the operation of the step motor 99 is controlled to make the swing angle θ of the swing body 95 coincide with the finally determined swing angle θ.
Thereby, when the first part 11 and the second part 12 of the pair of left and right resin parts 10L and 10R are sandwiched and fixed by the first and second fixing means 93 and 94, respectively, the resin part 10 is Each is fixed at the optimal correction angle.

Next, when the robot moves the product chuck plate 92 to a predetermined position, the injection mold is closed again, and the next injection molding cycle is started.
Then, a gate processing means (not shown) separates the gate and spool extending from the injection molded resin part 10 from the main body of the resin part 10.
Thereafter, when a predetermined time elapses, the control means C opens the first fixing means 93 and the second fixing means 94, and releases the resin component 10 that has been cooled and corrected to a predetermined position.

  That is, the correction system 300 according to the third embodiment directly receives, clamps and fixes the high-temperature resin parts 10L and 10R extruded from the injection mold and releases the resin parts to a predetermined position. Since it is the structure which cools 10 and correct | amends, it can correct | amend a resin component efficiently in the period shorter than the cycle time of injection molding.

Further, the correction system 300 of the third embodiment has a structure in which the second fixing means 94 is provided with a step motor 99 and the second fixing means 94 is oscillated.
As a result, due to the difference in the flow state of the molten resin during injection molding of the pair of left and right resin parts 10L and 10R whose directions in the vertical direction are opposite to each other, the twists generated in the pair of left and right resin parts 10L and 10R, respectively. In accordance with the difference, the swing angle of the second fixing means 94 relative to the first fixing means 93 can be varied to optimally correct the pair of left and right resin parts 10L and 10R.

The product chuck plate 92 may be provided with a gate processing means for processing the gate extending from the resin component 10 to separate it from the main body portion of the resin component 10.
Further, the product chuck plate 92 may be provided with a cooling means (not shown) that blows cooling air onto the resin component 10 to quickly reduce its temperature.
Further, the product chuck plate 92 has a structure in which a pair of left and right resin parts 10L and 10R are clamped and fixed. However, a structure in which more resin parts 10 are clamped and fixed, or only one resin part 10 is clamped. And it can also be set as the structure fixed.
In addition, as in the correction system 100 of the first embodiment described above, the pins 24 and 34 may be inserted through the first and second portions 11 and 12 of the resin component 10.

As mentioned above, although each embodiment of the correction system of the injection molded product which concerns on this invention was described in detail, it cannot be overemphasized that this invention is not limited by embodiment mentioned above and various changes are possible.
For example, in the first and second embodiments described above, the screw shaft 52 of the swinging means 50 is rotationally driven by the step motor 51. However, an operator manually operates without using the step motor. A structure in which the screw shaft 52 is rotated by operating the rotary handle may be employed.

  In addition, in each of the first and second embodiments described above, the case where the twist generated in the resin component is corrected has been described. However, the warp, the tilt, the deformation, and the vertical / horizontal misalignment generated in the resin component are corrected. Needless to say, the present invention can also be applied to cases.

  Furthermore, in each of the correction systems 100 and 200 of the first and second embodiments described above, the swinging bodies 41 and 81 are swung using one step motor 51, but a plurality of correction systems 100 and 200 are used. Are used together, the stepping motors 51 of the respective correction systems 100 and 200 are individually controlled to change the swinging angles of the swinging bodies 41 and 81 to correct each resin component 10 optimally. Needless to say, you can.

The top view which shows typically the correction system of the injection molded product of 1st Embodiment. The front view of the correction system shown in FIG. Side surface sectional drawing of the correction system shown in FIG. The top view explaining the action | operation of the correction system shown in FIG. The front view explaining the action | operation of the correction system shown in FIG. The top view which shows typically the correction system of the injection molded product of the modification of 1st Embodiment. The front view of the correction system of the modification shown in FIG. Side surface sectional drawing which shows typically the correction system of the injection molded product of 2nd Embodiment. The front view which shows typically the correction system of the injection molded product of 3rd Embodiment.

C control means (first and second control means)
DESCRIPTION OF SYMBOLS I Injection molding apparatus M Material discrimination apparatus 10 Resin part 11 1st part 11a Through-hole 12 2nd part 12a Through-hole 20 1st fixing means 21 Stationary block 22 Movable block 23 Air cylinder 23a Piston rod 24 Pin 30 2nd Fixing means 31 Stationary block 32 Movable block 33 Air cylinder 33a Piston rod 34 Pin 41 Oscillator (movable part)
42 oscillating shaft 43 stationary portion 44 support arm 45 screw nut 50 oscillating means 51 step motor 52 screw shaft 53 connection link 60 first support means 61 movable block 62 air cylinder 62a piston rod 70 second support means 71 movable block 72 Air cylinder 72a Piston rod 81 Oscillator (movable part)
82 Oscillating shaft 83 Stationary portion 84 Support arm 85 Nut 86 Support arm 91 Engaging portion 92 Product chuck plate 93 First fixing means 94 Second fixing means 95 Oscillating body 96 Stationary part 97 Oscillating shaft 98 Reducer 99 Step Motor 100 Correction System for Injection Molded Product of First Embodiment 110 Correction System for Injection Molded Product of Modified Example 200 Correction System for Injection Molded Product of Second Embodiment 300 Correction System for Injection Molded Product of Third Embodiment

Claims (8)

A system for correcting the shape and dimensions of the resin component by cooling in a state where a high-temperature resin component injection-molded by an injection molding device is fixed to the correction device,
The straightening device is
First fixing means for holding and fixing the first portion of the resin component;
A second fixing means for holding and fixing the second portion of the resin component, which is supported so as to be changeable in relative position with respect to the first fixing means;
Driving means for driving and displacing the second fixing means to change the relative position of the second fixing means with respect to the first fixing means;
First control means for controlling the operation of the drive means;
With
The first control means includes
A first selection means for selecting a relative position of the second fixing means with respect to the first fixing means according to an injection molding condition obtained from the injection molding apparatus;
An injection molded article correction system, wherein the operation of the driving means is controlled to displace the second fixing means to a relative position selected by the first selecting means . A system for correcting the shape and dimensions of the resin component by cooling in a state where a high-temperature resin component injection-molded by an injection molding device is fixed to the correction device,
The straightening device is
First fixing means for holding and fixing the first portion of the resin component;
A second fixing means for holding and fixing the second portion of the resin component, which is supported so as to be changeable in relative position with respect to the first fixing means;
Driving means for driving and displacing the second fixing means to change the relative position of the second fixing means with respect to the first fixing means;
Second control means for controlling the operation of the drive means;
With
The second control means includes
A second selection means for selecting a relative position of the second fixing means with respect to the first fixing means in accordance with a composition or a physical property value of a resin raw material used for injection molding;
An injection molding product correction system, wherein the operation of the driving means is controlled to displace the second fixing means to the relative position selected by the second selecting means . 3. The correction of an injection molded product according to claim 1, wherein the driving means is a motor interposed between a movable part and a stationary part constituting the second fixing means. system. 4. The injection according to claim 3 , wherein the driving unit has a link mechanism that integrally connects the movable parts of the plurality of second fixing units in the plurality of correction devices arranged in parallel. 5. Molded product correction system. The first and second fixing means are:
A sandwiching portion for sandwiching the resin component in the left-right direction, the longitudinal direction of which is the front-rear direction;
A support portion for supporting the resin component from below;
First and second drive parts that drive the clamping part and the support part so as to be able to advance and retreat, respectively, and whose operation is controlled by the control means;
The correction system for an injection-molded product according to any one of claims 1 to 4, characterized by comprising: The sandwiching portion of the first and second fixing means has a pin that is inserted in a through hole penetrating the resin component in the left-right direction so as to be freely inserted and removed and prevents the through hole from contracting during cooling. The correction system for an injection molded product according to claim 5 . The correction system for an injection molded product according to any one of claims 1 to 6, wherein the correction device is fixedly disposed adjacent to the injection molding device. The correction device is supported by a robot for taking out the resin component from the injection molding device, and reciprocates between a position for receiving the resin component from a mold of the injection molding device and a position for discharging the resin component. The correction system for an injection molded product according to any one of claims 1 to 6, wherein the correction system is configured to move.

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