JP3520673B2 - Resin molding die for insert molding - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold structure for integrally injecting a resin frame member into a peripheral portion of a plate-shaped glass as an insert, and particularly to a mold structure such as a window glass of an automobile. In the case of glass with a curvature of, if the position of the glass is misaligned, it is likely to cause damage during or after mold clamping.Therefore, it is necessary to detect the misalignment of the glass that causes damage to the glass. Related to the mold structure.

[0002]

2. Description of the Related Art Rear side window glass for automobiles (2
In the case of door cars) or opera window glass, it is called the module window method, and a molding such as vinyl chloride (PVC) is integrally formed in advance on the peripheral edge of the window glass in the state of the window glass alone. ing.

According to this module construction method, a fixed mold and a movable mold are clamped and a wind glass is sandwiched between the two, while the wind glass is used as an insert in a cavity formed in the peripheral portion of the wind glass. A molding which is a frame member is integrally molded by injecting a predetermined resin material (see, for example, Japanese Patent Laid-Open No. 57-1737 and Japanese Utility Model Laid-Open No. 2-50318), and the wind glass itself has a predetermined curvature. Since it has, the positioning accuracy of the wind glass at the initial setting to the mold is poor, or the position of the wind glass is displaced when the mold is moved,
If the window glass is displaced during mold clamping, or if the window glass is displaced due to the influence of the resin injection pressure, there is a problem that the window glass is damaged during mold clamping or during injection molding.

Incidentally, the above-mentioned positional deviation when moving the mold is
When productivity is taken into consideration, the window glass is set on the lower movable mold, and the movable mold is moved to the position just below the fixed mold (upper mold) and then the mold is clamped. This is the positional displacement of the windshield caused by vibration when the mold is moved to just below the fixed mold.

For this reason, conventionally, as shown in FIG. 6, a compression coil spring 52 is attached to a fixed die (upper die) 51.
A movable type (lower type) while a pin 53 urged by
A limit switch 55 is provided on 54 so as to face the pin 53 with the wind glass G interposed therebetween. When the wind glass G breaks, the force of the compression coil spring 52 causes the pin 53 to project to move the limit switch 55. O
N is activated, which causes the windshield G
It is designed to electrically detect damage to the. Reference numeral 56 in FIG. 6 is a molding integrally formed with the wind glass.

[0006]

In the conventional structure as described above, since the detection is made only after the window glass is broken, it is not possible to contribute to the improvement of the material yield, and the secondary problem of the glass breakage is also caused. Occurrence is feared, and the broken glass surface may damage the surface of the mold, which is not preferable in practice.

The present invention has been made by paying attention to the above problems, and detects the position shift of the glass which is a direct cause of the glass breakage, so that the damage of the glass itself and the secondary damage accompanying it. It is intended to provide a mold structure that prevents the occurrence of defects.

According to the first aspect of the present invention, the fixed mold and the movable mold are clamped, and a plate-shaped glass is sandwiched under pressure between the two.
In a resin molding die in which this glass is used as an insert to integrally form a frame member on the peripheral edge of the glass,
Either one of the fixed mold and the movable mold is provided with a detection unit that detects the positional deviation of the glass when the position of the glass with respect to the mold deviates from the normal position within the glass surface . And the front and back edges of the peripheral edge of the glass
One side is painted in advance over a specified width
A predetermined amount from the inside edge of this painted area.
The detection means is the position of the glass with the position on the side as the detected part.
The feature is that the deviation is detected .

The invention according to claim 2 is the description of claim 1 .
As a precondition, the positioning error of the glass with respect to the mold and the coating
Allowable for width dimension error of mounting area and manufacturing error of glass itself
As long as the area is
Position of the glass as a detected part at a position that is outward only for a fixed amount
It is characterized in that the position of the detecting means is set so as to detect the deviation .

The invention according to claim 3 is the same as claim 1 or
As the mold structure in the invention described in 2, the polygonal glass is used.
The gate is installed at a position corresponding to one side of the
Resin from the gate to the frame member molding cavity.
The gate while being formed to inject material
The side where the part is set or the pair facing this side.
Detects the displacement of the glass by using the vicinity of the side as the detected part
It is characterized in that the detection means is arranged as described above.

The invention according to claim 4 is the same as that of claims 1 to 3.
Detecting hand at the time of position displacement detection in the invention described in any one
The step output is the mold clamping operation stop command or the injection operation stop finger.
It is characterized in that it is given to the molding control means as an instruction .

According to a fifth aspect of the present invention, the vicinity of the opposite side portion of the third aspect of the invention is used as a detected portion of glass.
It is characterized in that a plurality of non-contact type sensors are provided so as to detect displacement .

The invention according to claim 6 is the same as that of claims 1 to 5.
The fixed type and the movable type in the invention described in any one of
Frame member of glass is molded on each mold surface when clamping
The glass elastically contacts the inner part of the area to be
It is characterized in that an elastic body for holding by pressure is provided .

[0014]

Therefore, according to the invention described in claim 1,
When the positional displacement of the glass with respect to the mold during the initial setting, the displacement of the glass during the movement of the mold, or the displacement of the glass during the mold clamping occurs, the detecting means immediately detects this. Then, apply a predetermined paint color to the peripheral edge of the glass.
The edges inside this painted area, if painted.
The position that is located a certain amount of the outside from the edge part is
Adjust the sensor position in advance to detect the displacement of the lath.
If you prepare it, the coating area will be removed from the detection area of the sensor.
If the area is out of the way
To detect. Particularly, in the invention as set forth in claim 2,
Glass positioning error, coating area width dimension error and
Always paint as long as the manufacturing error of the glass itself is within the allowable range
Position the outside of the area by a specified amount from the inner edge.
As the position shift of the glass is detected as the detected part,
The result of the positional deviation of the window may be affected by the glass positioning error, etc.
Never be done.

In particular, in the invention according to claim 3, the positional deviation of the glass is detected by using one side of the polygonal glass where the gate is set or the opposite side opposite to the one side as the detected part. Therefore, when the glass is displaced due to the injection pressure at the initial stage of the injection start of the resin material, the detection means immediately detects this.

Further, in the invention described in claim 4, the output of the detecting means at the time of detecting the positional deviation is given to the molding control means as a mold clamping operation stop command or an injection operation stop command to immediately stop the subsequent operation. Therefore, it is possible to prevent the glass from being damaged due to the displacement of the glass.

Further, in the invention according to claim 5, the presence or absence of the positional deviation of the glass is monitored by a plurality of non-contact type sensors, and when any one of the sensors detects the positional deviation of the glass, the above-mentioned Immediately after that, the subsequent operation is stopped to prevent the glass from being damaged.

According to the sixth aspect of the invention, the glass is elastically clamped by the elastic bodies provided on the mold surfaces of both the fixed mold and the movable mold when the mold is clamped, and the dimension of the glass in the plate thickness direction is measured. While absorbing the variation, the frictional force between the elastic body and the glass opposes the injection pressure of the resin material, and suppresses the displacement of the glass due to the injection pressure.

[0020]

[0021]

According to the invention as set forth in claim 1, since the detecting means for detecting the positional deviation of the glass with respect to the mold is provided, the positional deviation and the mold at the initial setting of the glass which directly cause the glass breakage. It is possible to prevent the breakage of the glass by detecting the positional shift of the glass due to the tightening at the stage of the positional shift. As a result, it is possible not only to improve the yield by avoiding breakage of the glass but also to prevent damage to the mold surface, which is a secondary defect when the glass is broken. In particular, pre-apply on the peripheral edge of the glass.
The inner edge of this painted area, if equipped
As a detected part, a position that is a predetermined amount outward from the
Since the position shift of the
The area near the edge inside the mounting area should not be covered with resin.
Therefore, even if the glass is displaced during the injection operation of the resin material,
There is an effect that can be surely detected.

According to the second aspect of the invention, the mold is
Glass positioning error, painting area width dimension error and
And the manufacturing error of the glass itself, etc.
As long as it is within the tolerance, it is always the inner edge of the painting area.
From the glass as a detected part at a position outward by a predetermined amount
Since the positional deviation is detected, the method according to claim 1 is provided.
In addition to the same effects as the invention described in 1.,
Being affected by errors as long as they are within the allowable range
There is an effect that the positional deviation of the glass can be surely detected.

According to the invention described in claim 3, the polygonal shape
At the position corresponding to one side of the glass, the resin material injection
If the gate section is set, the gate section is set.
Glass near the one side or the opposite side as the detected part
The displacement of the
Detection method considering the direction in which the glass may move due to sound
Since it is arranged, the invention according to claim 1 or 2
In addition to the same effect, the glass is displaced due to the injection pressure.
Even if the above occurs, there is an effect that this can be detected accurately .

According to the invention described in claim 4, the glass
The output at the time of position deviation detection is used as a mold clamping operation stop command or shot.
It is added to the molding control means as an output operation stop command.
Therefore, the claims 1 to 3 are also provided in the automated equipment.
Similar to the invention described in any of the
This has the effect of preventing secondary problems that accompany it.

According to the invention described in claim 5, a polygonal shape
At the position corresponding to one side of the glass, the resin material injection
Opposite side opposite to one side when the section is set
Detects the position shift of the glass with the vicinity of the part as the detected part
The plurality of non-contact type sensors are provided, whereby the method according to claim 3 is provided.
In addition to the same effects as the invention described in,
Therefore, if the glass is misaligned, either
There is an effect that can be reliably detected by the sensor .

According to the invention of claim 6, the fixed type
And glass on each mold surface of the movable mold during mold clamping.
Claimed by providing an elastic body that sexually presses and holds.
In addition to the effects similar to those of the invention described in any one of 1 to 5,
Also, due to the bending of the elastic body, the variation in the glass thickness direction
Not only can absorb the
The injection force of the resin material can be countered by the friction force between
Therefore, there is an effect that the displacement of the glass due to the injection pressure can be suppressed .

[0027]

[0028]

3 and 4 are views showing a typical embodiment of the present invention. FIG. 3 shows a rear side window glass of an automobile manufactured by a modular method (hereinafter, simply referred to as window glass). ) 1 is shown in FIG.
Shows respective mold structures for molding the above-mentioned modular window glass 1.

As shown in FIG. 3, the window glass 1 is formed as a substantially triangular shape having a predetermined curvature in order to match the molding of the entire vehicle body, and the entire peripheral portion of the back surface of the window glass 1 is formed. For example, a black ceramic coating is applied in advance to a predetermined width W to form a coating region 2, and a resin molding made of, for example, vinyl chloride (PVC) is formed on the entire peripheral edge of the coating region 2. 3 is integrally molded.

The mold 4 shown in FIG. 4 is roughly classified into an upper mold (cavity block) 5 fixed to a fixed side mounting plate 8 and functioning as a fixed mold, and a movable mold fixed to a movable side mounting plate 9 as a movable mold. It is composed of a lower mold (core block) 6 that functions, an ejector plate 7, etc., and a plurality of ejector pins 10 are connected to the ejector plate 7 as is well known. Then, the upper die 5 and the lower die 6 are clamped to each other so that elastic pads 19 and 20 to be described later are provided therebetween.
By holding the windshield 1 under pressure through the
A cavity 11 is formed between the upper and lower molds 5 and 6 and the window glass 1 as a space to be the molding 3. A distance block 12 is fixed to the lower die 6, and the relative position between the lower die 6 and the upper die 5 is restricted by this.

Wind glass 1 of the upper and lower molds 5 and 6
The upper and lower molds 5, 6 are provided at a position corresponding to one side 1a.
A runner portion 13 and a submarine gate portion 14 are formed downward from the mold matching surface. Then, by injecting a predetermined resin material into the sprue portion 14 with the injection nozzle 15, the resin material passes through the runner portion 13 and the submarine gate portion 14, and then the ejector pin 1
0 through the secondary runner portion 16 formed in the cavity 1
It is ejected to 1.

Further, a plurality of vacuum cups 17 connected to a negative pressure pump (not shown) are arranged at a position corresponding to the window glass 1 on the mold surface of the lower mold 6,
The negative suction force generated by the vacuum cup 17 presses the window glass 1 against the lower mold 6 to position and fix the window glass 1.

On the other hand, an air supply port 18 connected to an air pressure source (not shown) is formed at a position corresponding to the window glass 1 on the mold surface of the upper mold 5, and when the mold is opened, as will be described later. By blowing compressed air from the air supply port 18, the mold release of the window glass 1 after the molding of the molding 3 from the upper mold 5 is facilitated.

As shown in FIGS. 1 and 2 in addition to FIG. 4, at the position corresponding to the inside of the molding part of the window glass 1 on the mold surface of the upper mold 5, the elasticity made of urethane rubber as an elastic body is set. While the pad 19 is provided, an elastic pad 20 made of urethane rubber is also provided at a position on the die surface of the lower die 6 facing the elastic pad 19 on the upper die 5 side, and the elastic pad is also provided. A seal rubber 21 made of silicon rubber or the like is also provided as an elastic body at a position outside 20.

The elastic pads 19 and 20 and the seal rubber 21 are set in advance to have a height dimension in consideration of the compression allowance so that they are elastically contacted with the window glass 1 at the time of mold clamping and are deformed by a predetermined amount. The pads 19 and 20 and the seal rubber 21 are arranged along the entire circumference of the peripheral edge of the window glass 1.

The seal rubber 21 is fitted and arranged in the groove portion on the lower die side, and is fixed by pressure by the taper block 22, while the elastic pad 19 on the upper die 5 side is the groove portion on the upper die 5 side. The elastic pad 20 on the lower die 6 side is further fitted and fixed in the groove formed on the upper surface of the taper block 22.

Here, the seal rubber 21 is the cavity 1
In order to have a function of defining the window 1, it has to be continuously provided along the entire circumference of the window glass 1, while both elastic pads 19 and 20 define the cavity 11. Since it does not have a function of forming and forming, it does not necessarily need to be continuously provided along the entire circumference of the peripheral edge portion of the window glass 1, and a plurality of divided elastic pads 19 and 20 are predetermined in the circumferential direction. You may make it arrange | position at the pitch of.

Of the lower mold 6, an arc-shaped opposite side portion 1b facing the one side portion 1a of the window glass 1 (see FIGS. 3 and 5).
As shown in FIGS. 1 and 2, three reflective photoelectric sensors 24 are arranged along the edge portion 23 inside the coating area 2 at a position corresponding to. These photoelectric sensors 24 are opposite side portions 1b which are a part of the peripheral edge portion of the window glass 1.
Of the mold 4 according to the intensity of incident light due to the reflection of the coating area 2
The positional deviation of the window glass 1 with respect to the position of the window glass 1 is detected. The position of the window glass 1 is fixed to the lower mold 6 via the bracket 25 so that the position of the lower mold 6 can be adjusted. And each photoelectric sensor 2
The tip of 4 is positioned with a glass debris stop collar 26,
The coating area 2 of the window glass 1 is exposed through a through hole 27 formed in the elastic pad 20. A through hole 28 is also formed in the elastic pad 19 in order to secure the glossy surface of the upper mold 5 in order to prevent malfunction of the photoelectric sensor 24.

Here, the optical axis of each photoelectric sensor 24 is set so as to be located outside of the inner edge portion 23 in the coating area 2 of the opposite side portion 1b by a predetermined amount α (for example, about 2 mm). Moreover, the manufacturing error of the window glass 1 itself, the dimensional error of the width W of the coating region 2, and the mold 4
As long as the positioning error of the window glass 1 with respect to is within the allowable range, the above dimension α is set.

The mold clamping device (not shown) to which the mold 4 shown in FIG. 4 is attached and the injection device mainly composed of the injection nozzle 15 is the control panel 2 which is the molding control means shown in FIG.
Centrally controlled by 9.

In the mold structure constructed as described above, when the window glass 1 is set in the mold 4, the lower mold 6 is not under the upper mold 5 and is waiting in another glass setting process. Then, the windshield 1 is placed on the lower mold 6 by manual or automated handling means.
Is set, the lower die 6 moves to a position below the upper die 5 and is clamped with the upper die 5.

At the time of this mold clamping, the window glass 1 is elastically pressed and held by the elastic pads 19 and 20 of the upper and lower molds 5 and 6 and the seal rubber 21, and at the same time, the negative pressure suction force of the vacuum cup 17 lowers the window glass 1. The mold 6 is pressed and positioned.

After that, a predetermined resin material is injected from the injection nozzle 15, and the runner portion 13 and the submarine gate portion 1 are
By filling the cavity 11 with the resin material through the secondary runner portion 4 and the secondary runner portion 16, the molding 3 is integrally formed on the peripheral edge portion of the window glass 1.

After the molding is completed, the window glass 1 integrally opened with the molding 3 is opened after a predetermined holding pressure and cooling time, and the window glass 1 is released from the mold. The window glass 1 is smoothly separated from the upper mold 5 by the blowing of compressed air, while the ejector pin 10 finally projects the window glass 1 above the lower mold 6.

In the series of molding processes as described above, the outputs of the three photoelectric sensors 24 are taken into the control panel 29, and the irradiation light from the photoelectric sensors 24 is in the coating area 2 and the reflected light is photoelectrically converted. As long as the sensor 24 captures, the photoelectric sensor 24 is ON, while the photoelectric sensor 24 is
When the irradiation light from the outside of the coating area 2 is deviated, the photoelectric sensor 24 is turned off due to the decrease in the amount of reflected light. When any one of the three photoelectric sensors 24 is turned off, the determination unit in the control panel 29 determines that the positional deviation of the window glass 1 has occurred and stops the subsequent operation.

For example, the windshield 1 for the lower mold 6
When the lower mold 6 moves to the lower position of the upper mold 5 even if the positional deviation exceeds the allowable positioning error in the initial setting stage of 1. or even when the positional deviation does not occur during the initial setting of the window glass 1. When the positional deviation occurs due to external vibration or the like, one or more of the three photoelectric sensors 24 are turned off. In response to the output of the photoelectric sensor 24, the control panel 29 side stops the subsequent mold clamping operation, and at the same time, the operator is notified by a warning means such as a buzzer or a lamp.

This makes it possible to prevent damage to the wind glass 1 such as when the mold is clamped with the positional deviation of the wind glass 1 being tolerated, and at the same time, damage to the mold surface due to the damage to the wind glass 1. It is possible to prevent the occurrence of secondary defects such as sticking.

In addition, as shown in FIG. 5, the three photoelectric sensors 24 are coated with the coating area 2 of the opposite side portion 1b curved in an arc shape.
Since it is arranged along the inner edge portion 23 of
Even if the positional deviation occurs in any direction within the three-dimensional curvature surface of the window glass 1 itself, this can be accurately detected.

On the other hand, before the mold clamping operation, the wind glass 1
When there is no displacement of position, the mold clamping operation is performed as usual, and then the injection operation is continued. At this time, the window glass 1 may be displaced when the upper mold 5 comes into contact with the window glass 1 due to the mold clamping. In this case as well, the mold clamping operation is immediately stopped at the stage of detecting the displacement. To do.

Similarly, even if there is no displacement of the window glass 1 until the mold clamping is completed, when the injection operation is started, as shown in FIG.
Since the resin material is filled first from the portion corresponding to, the force that presses the window glass 1 in the direction of arrow a upon receiving this injection pressure works. The frictional force of the elastic pads 19 and 20 and the seal rubber 21 holding the window glass 1 against the pressing force opposes the pressing force by the injection pressure, thereby suppressing unnecessary movement of the window glass 1.

On the other hand, the friction force of the elastic pads 19 and 20 and the seal rubber 21 alone cannot counter the injection pressure, and when the injection pressure causes the window glass 1 to be displaced, this is detected by the three photoelectric sensors 24. Any of the above is detected, and the injection operation is stopped at that time.

As described above, according to this embodiment, the positional deviation of the window glass 1 on the lower mold 6 is detected by the three photoelectric sensors 24.
Since it is detected by any of the above, and the subsequent mold clamping operation or injection operation is stopped at that time,
It is possible to prevent glass breakage due to the positional deviation of the windshield 1.

[Brief description of drawings]

FIG. 1 is a diagram showing a typical embodiment of the present invention, and FIG.
FIG.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a front explanatory view of an automobile rear side window glass in which a molding is integrally formed by a module method.

FIG. 4 is an explanatory sectional view of the entire mold showing a typical embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a positional relationship between a rear side window glass and a photoelectric sensor.

FIG. 6 is an explanatory sectional view showing an example of a conventional mold structure.

[Explanation of symbols]

1 ... Rear side window glass 1a ... One side 1b ... Opposite side 2 ... Painting area 3 ... Mall 4 ... Mold 5 ... Upper mold 6 ... Lower mold 11 ... Cavity 19, 20 ... Elastic pad 21 ... Seal rubber 23 ... Inner edge 24 ... Photoelectric sensor 29 ... Control panel

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI // B29K 105: 20 B29L 31:30 B29L 31:30 B60J 1/18 F (56) Reference JP-A-6-122123 (JP , A) Japanese Unexamined Patent Publication No. 8-78452 (JP, A) Actual Development Sho 63-101517 (JP, U) Actual Development Sho 63-156720 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) (Name) B29C 45/00-45/84 B29C 33/00-33/76 B60J 1/00-1/20

Claims (6)

(57) [Claims] 1. A fixed mold and a movable mold are clamped, a plate-shaped glass is sandwiched under pressure between the two, and a frame member is integrally formed on the peripheral edge of the glass by using this glass as an insert. In the resin molding die, the detection means for detecting the positional deviation of the glass in either the fixed die or the movable die when the position of the glass with respect to the die deviates from the normal position in the glass surface. the result is provided, in advance Tokoro on one surface sides or the periphery of the glass
It has been painted over a certain width and within this painted area
The position on the outer side by a predetermined amount from the edge part on the side to be detected
The resin molding die for insert molding is characterized in that the detection means detects the positional deviation of the glass . 2. A glass positioning error relative to a mold, coating
Allowable for width dimension error of mounting area and manufacturing error of glass itself
As long as the area is
Position of the glass as a detected part at a position that is outward only for a fixed amount
The resin molding die for insert molding according to claim 1, wherein the position of the detection means is set so as to detect the deviation . 3. A position corresponding to one side of polygonal glass
The gate part is installed in the
Formed by injecting resin material into the molding cavity
On the other hand, one side part where the gate part is set or this one side part
The glass is not positioned in the vicinity of the opposite side as the detected part.
The resin molding die for insert molding according to claim 1 or 2 , wherein a detection means is arranged so as to detect this . 4. The output of the detecting means at the time of detecting the positional deviation is the mold clamping.
Molding control as an operation stop command or injection operation stop command
Claims that are provided to the means
The resin molding die for insert molding according to any one of 1 to 3 . 5. A glass near the opposite side is used as a detected portion.
The resin molding die for insert molding according to claim 3, wherein a plurality of non-contact type sensors are provided so as to detect the positional deviation of the sheet. 6. Fixed mold surface and movable mold surface
The part of the glass where the frame member is to be molded during mold clamping.
Elastically presses the glass by elastically contacting the inner part of the position
An elastic body is provided, and 1 to 5 characterized by the above-mentioned.
The resin molding die for insert molding according to any one of 1 .