JP3949404B2 - Mold for composite molding - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a composite molding die for molding a molded product obtained by alternately injecting synthetic resins of different types of materials. More specifically, different mold parts of the rotatable mold are alternately converted, advanced and retracted, and the mold is closed, so that synthetic resin of different types of materials can be injected to form an integrated molded product. The present invention relates to a composite mold.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, generally in a mold apparatus, a resin or the like is usually inserted into a cavity space of a molding die and solidified, and then the molding die is opened to take out a molded product. This molded product is usually molded by injection of one type of synthetic resin, but different types of synthetic resin are injected in different steps and are integrally molded. This integrally molded product is used in, for example, automobile parts and electrical products. Some automotive parts, if seat parts, are made of a hard material for the part to be attached to the vehicle body, and a part that comes in contact with the hand is made of a soft material such as an elastomer. .
[0003]
Conventionally, a hard molded product and a soft molded product molded with different molds are integrated by bonding or welding with an adhesive. Also, by sharing the fixed mold and making the movable mold different, by exchanging the movable mold, hard and soft materials are injected and integrated. The molded product was molded. In addition, a slide part that can be moved forward and backward is enclosed in a part of the mold on the movable side, and synthetic resin of different types of materials is separately injected to form an integrated molded product as switching of the forward and backward movement of this slide part. Has also been proposed.
[0004]
[Problems to be solved by the invention]
The conventional molding method requires separate similar molds, which increases the cost and requires a large number of man-hours. The method such as bonding requires individual independent dies, and a process of bonding or welding molded products as individually molded parts is necessary. This process requires man-hours for post-processing such as positioning and improving the appearance after completion. The method of using different molds on the movable side is an inevitable increase in cost. Furthermore, the method of enclosing the slide part in the mold is to enclose the movable part in the movable side mold, which may be difficult to install depending on the shape of the movable side mold. There are problems such as difficulty. Moreover, it is limited to a molded product that is easy to open, and there is a problem in terms of maintenance. Such a conventional method is economically problematic because of its complicated configuration and high cost.
[0005]
The present invention has been made based on the technical background as described above, and achieves the following object.
An object of the present invention is to provide a mold for composite molding that can be integrally molded with high productivity and good appearance.
Another object of the present invention is for composite molding in which a part of the movable mold can be rotated so that synthetic resins of different kinds of materials can be injected, and the structure is simple and economical molding is possible. The purpose is to provide molds.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the composite molding die of the present invention is a composite molding die for integrally molding synthetic resins of different materials, and includes a fixed die, a movable die, and the fixed die. A first cavity formed by a mold and the movable mold; a second cavity formed by the fixed mold and the movable mold and communicating with the first cavity; and fixed to the outside of the movable mold. A base provided with a guide surface; a slide body which is guided by engaging with the guide surface and is movable relative to the movable mold; and a first member which is provided on the base and moves the slide body forward and backward. A drive body, a rotation mold that is rotatably provided on the slide body, can be combined with the movable mold, and can be detached from the movable mold, and constitutes a part of the rotation mold. The fixed mold and the movable mold for forming the first cavity A first mold part capable of entering and exiting, a part of the rotating mold, a second mold part capable of entering and exiting the fixed mold and the movable mold for forming the second cavity, A second driving body provided on the slide body for rotating the rotary mold to change the positions of the first mold part and the second mold part, and one of the first mold part and the second mold part; Is inserted into the positioning recess formed in the rotating mold and the positioning recess, and one of the first mold part and the second mold part is set to the predetermined position. A pin body for positioning and a third drive body for moving the pin body forward and backward with respect to the positioning recess .
[0007]
In the composite mold, the first mold part and the second mold part are provided with a predetermined angle in a rotation direction of the rotation mold, and the fixed mold and the movable mold are provided. It is preferable that it is configured to alternately enter and exit from the mold. As a result, different mold parts can be exchanged in a short time.
In the above-described composite molding die, the fixed die is preferably provided with a first gate for molding by the first cavity and a second gate for molding by the second cavity. . By providing gates for supplying synthetic resins of different materials in the same fixed mold, there is an advantage that the configuration is simple and maintenance is easy.
In the composite molding die, the pin body and the third driving body are preferably provided in the fixed mold .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described. FIG. 1 shows a configuration of a composite molding die according to the present invention. FIG. 1 is a cross-sectional view showing the configuration of a mold when injecting into a first cavity. FIG. 2 is a plan view of the state shown in FIG. It is AA sectional drawing which shows this. FIG. 3 is a cross-sectional view showing a state in which a part of the mold is open in the configuration of FIG. 1, and FIG. 4 is a cross-sectional view taken along the line BB showing a plane in the state of FIG. In the figure, the mold is basically composed of a fixed mold 1 and a movable mold 2, and a part of the movable mold 2 is a rotating mold 9 for molding a composite molded product. It is configured so that it can be detached and can enter and leave the mold freely.
[0009]
That is, the base 3 is fixed to the side surface of the movable mold 2, and a guide surface 4 that can move forward and backward in the mold direction is formed on the plane of the base 3. The slide body 5 is regulated in the movable mold 2 direction (arrow direction) across the guide surface 4 and can be guided. The guide operation of the slide body 5 is performed by a cylinder 6 fixed to the end of the base 3. That is, the slide body 5 is fixed to the rod 7 of the cylinder 6 with the bolts 8, and the slide body 5 slides on the guide surface 4 so as to freely advance and retract when the rod 7 moves forward and backward by a driving force such as hydraulic pressure. The slide body 5 moves by a predetermined stroke and is positioned at a predetermined position. A rotating mold 9 is rotatably provided on the slide body 5, and the rotating mold 9 is inserted between the fixed mold 1 and the movable mold 2 and is related to the present invention. Configure the mold.
[0010]
A rotating cylinder 10 for rotating the rotating mold 9 is provided below the slide body 5. A support body 12 is keyed to the shaft body 11 of the rotary cylinder 10, and the rotating mold 9 is fixed to the support body 12 with bolts. The rotating mold 9 is supported by a receiving body 13 provided on the slide body 5 in the form of a bearing, and can be smoothly rotated on the slide body 5. Therefore, the rotating mold 9 is rotatable on the slide body 5 by the rotating cylinder 10. This rotation operation is enabled when the rotation mold 9 is positioned at the retracted position where it does not interfere with the fixed mold 1 and the movable mold 2.
[0011]
In this embodiment, the rotating mold is configured to rotate 90 degrees, and one end of the rotating mold 9 forms a first mold portion 9 a corresponding to the first cavity 14. Yes. In the state of FIG. 1, the first mold part 9 a is inserted and the mold is closed, and molding by the first cavity 14 is possible. In addition, a second mold portion 9 b corresponding to the second cavity 15 is formed at the end portion of the rotating mold 9 on the sides having different 90-degree angles. The fixed mold 1 is provided with a positioning device 16 for positioning the rotating mold 9.
[0012]
This positioning device 16 is provided with a pin body 17 that can be moved forward and backward with respect to the rotating mold 9 side. The pin body 17 is enclosed in a hole 18 provided in the fixed mold 1, and can be moved forward and backward by a cylinder 19 fixed to the fixed mold 1 with a bolt. That is, since the pin body 17 is attached to the rod 20 of the cylinder 19 via the bolt 21, the pin body 17 can be moved forward and backward by the operation of the cylinder 19. The pin body 17 can be inserted and inserted into the bolt 21 from the side surface side of the bolt 21, and is detachable when taken out of the fixed mold 1.
[0013]
The hole 18 has a long hole shape, and the head of the pin body 17 also has a shape that forms a rectangular parallelepiped according to the hole shape. For positioning, the taper portion of the pin body 17 forms a cotter-shaped rectangular parallelepiped in accordance with the groove shape of the long groove 22 described later.
[0014]
On the other hand, long grooves 22 are provided at two locations on the upper part of the rotating mold 9. These two long grooves 22 are a long groove 22a for the first mold part 9a and a long groove 22b for the second mold part 9b, and are used for positioning the mold. The positioning operation of the mold part is performed by the rotary cylinder 10, and two switches 23 for detecting the positioning confirmation are provided on the slide body 5.
[0015]
This switch 23 is a switch 23a for confirming the position of the first mold part 9a and a switch 23b for confirming the position of the second mold part 9b. When the rotary mold 9 is rotated and positioned, the lever of the switch is The end of the first mold part 9a or the second mold part 9b is contacted to stop the rotation operation. The fixed mold 1 is provided with a first gate 24 for injecting, for example, soft synthetic resin into the first cavity 14. The second cavity 15 is provided with a second gate 25 for injecting, for example, hard synthetic resin.
[0016]
The present invention has the basic configuration as described above, and operates as follows. FIG. 1 shows a state in which synthetic resin is injected into the first cavity 14 across the fixed mold 1, the movable mold 2, and the rotating mold 9 through the first gate 24. In this case, the molded product by the first cavity 14 is molded, but the rotating mold 9 is retracted by the cylinder 6 by the guide operation of the slide body 5 in order to mold the composite molded product. At this time, the pin body 17 for positioning, which has been inserted in order to prevent the lateral movement of the rotating mold 9, is removed from the long groove 22. When the rotary mold 9 is retracted and positioned at a position where it does not interfere even if it rotates, the rotary mold 9 rotates 90 degrees by the operation of the rotary cylinder 10, and the first mold part 9a and the second mold part Change the position of 9b.
[0017]
That is, when the second mold part 9b is positioned at the proper position by the pivoting operation, the end of the second mold part 9b comes into contact with the switch 23b to stop the pivoting operation. Subsequently, the slide body 5 is moved forward and positioned in the directions of the fixed mold 1 and the movable mold 2 by the operation of the cylinder 6, and the second mold portion 9 b of the rotating mold 9 is fixed to the fixed mold 1 and the movable mold 2. In addition, a mold for the second cavity 15 is formed. Since the second long groove 22b matches the insertion position of the pin body 17 at this position, the pin body 17 is again inserted into the long groove 22b by the operation of the cylinder 19 to determine the position of the rotary die 9. When the position is determined, the synthetic resin is injected into the second cavity 15 through the gate 25. FIG. 5 shows this state.
[0018]
In this case, since the molding by the first cavity 14 is completed, a part of the molded product also constitutes a part of the mold. When a synthetic resin of a material different from that of the first cavity 14 is injected into the second cavity 15, the synthetic resin of the first cavity 14 side and the second cavity 15 becomes an integrated composite molded product. FIG. 6 shows a state where the movable mold 2 is opened together with the rotating mold 9 with respect to the fixed mold 1.
[0019]
The relationship between the positioning device 16 and the long groove 22 is as described above. When the first mold part 9a is in the mold closed state, the positioning device 16 operates to engage the pin body 17 with the long groove 22a. When the mold part 9b is closed, the positioning device 16 operates to engage the pin body 17 with the long groove 22b. When the mold is opened, the pin body 17 is detached from the long groove 22. The integrated composite molded product can be taken out in the state shown in this figure. In this way, by forming a mold that allows the two mold portions of the rotating mold 9 to alternately move in and out, composite molding is possible.
[0020]
FIG. 7 shows an embodiment where the cavities have different shapes. The first cavity 31 is an example in which the second cavity 32 is configured on the side surface of the rotating mold 9 and swells toward the rotating mold 9 with respect to the same configuration as the above-described embodiment. The gate for the second cavity 32 is provided across the fixed mold 1 and the rotating mold. FIG. 8 shows a state where the mold in the state of FIG. 7 is opened. In the case of this example, since there is an undercut portion, the rotating mold 9 is also detached from the movable mold 2.
[0021]
FIG. 9 shows another embodiment in which the cavities have different shapes. The first cavity 41 has the same configuration as that of the above-described embodiment, but the second cavity 42 is configured on the side surface of the rotating mold 9 and swells to the movable mold 2 side. The gate 43 is provided across the fixed mold 1 and the rotating mold 9 as in the above-described embodiment. FIG. 10 shows a state where the mold in the state of FIG. 9 is opened. In the case of this example as well, it is the same as in the previous embodiment that the rotating mold 9 is also detached from the movable mold 2. However, in order to remove the molded product, the undercut portion is located on the movable mold 2 side. Therefore, although not shown, it is possible to take out the molded product by cutting a part of the movable mold and cutting the mold of the undercut portion.
[0022]
As described above, the mold of the present invention can cope with a molded product which seems to be quite complicated. Furthermore, although the present invention has been described with respect to an example in which the mold part of the rotating mold 9 is two, it can be applied to three or more composite moldings, and various composite molded products can be quickly molded. . Furthermore, although the rotating mold 9 has been described as being rotated in a horizontal state, the driving body 51 capable of reciprocating drive X and rotation driving Y is attached to the base 50 attached to the movable mold 2 as in the example of FIG. A disk-shaped support plate 52 is attached to the drive body 51 in a vertical direction, and a rotary mold die 53 attached to the support plate 52 is closed to a fixed die and a movable die. You may make it make it. Although application in this case is limited to the shape of the molded product, various types of composite injection forms are possible. As described above, the present invention is not limited to the description of the examples, and can deal with various types of molded articles.
[0023]
【The invention's effect】
As described in detail above, the present invention enables a composite molding with a rotating mold configuration in which a part of the movable side mold can be rotated, so that an integral molding with high productivity and good appearance can be achieved. In addition, various kinds of synthetic resins can be injected. In addition, a simple structure and economical composite molding became possible.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a mold configuration in the case of injection into a first cavity in a composite mold according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA showing the plane of FIG. 1;
FIG. 3 is a cross-sectional view showing a state in which the rotary mold is open with the same configuration as in FIG. 1;
4 is a cross-sectional view taken along the line BB showing the plane of FIG. 3. FIG.
FIG. 5 is a partial cross-sectional view showing a mold configuration when injecting into a second cavity in a composite mold according to the present invention.
FIG. 6 is a partial cross-sectional view showing mold opening in the state of FIG. 5;
FIG. 7 is a partial cross-sectional view showing a state of another composite molding die.
FIG. 8 is a partial cross-sectional view showing mold opening in the state of FIG. 7;
FIG. 9 is a partial cross-sectional view showing a state of another composite molding die.
FIG. 10 is a partial cross-sectional view showing mold opening in the state of FIG. 9;
FIG. 11 is a cross-sectional view of a composite mold showing an example in which a rotary mold is rotated vertically.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Fixed mold 2 ... Movable mold 3 ... Base 5 ... Slide body 9 ... Rotating mold 10 ... Rotating cylinder 17 ... Pin body

Claims (4)

A composite mold for integrally molding synthetic resins of different materials ,
A fixed mold (1);
Movable mold (2),
A first cavity (14) formed by the stationary mold (1) and the movable mold (2);
A second cavity (15) formed by the fixed mold (1) and the movable mold (2) and communicating with the first cavity (14);
A base (3) fixed to the outside of the movable mold (2) and provided with a guide surface (4);
A slide body (5) engaged with the guide surface (4) and guided and movable relative to the movable mold (2);
A first drive body (6) provided on the base (3) for moving the slide body (5) forward and backward;
A rotating mold (9) which is provided on the slide body (5) so as to be rotatable, can be combined with the movable mold (2) and can be detached from the movable mold (2);
A first mold part that constitutes a part of the rotating mold (9) and can enter and exit the fixed mold (1) and the movable mold (2) to form the first cavity (14). 9a)
A second mold part that constitutes a part of the rotating mold (9) and can enter and exit the fixed mold (1) and the movable mold (2) to form the second cavity (15). 9b)
A second driving body (10) provided on the slide body (5) and for rotating the rotating mold (9) to change the positions of the first mold part (9a) and the second mold part (9b). )When,
In order to position one of the first mold part (9a) and the second mold part (9b) at a predetermined position, a positioning recess (22a, 22b) formed in the rotating mold (9); ,
A pin body (17) that fits into the positioning recesses (22a, 22b) and positions one of the first mold part (9a) and the second mold part (9b) at a predetermined position;
A composite molding die having a third driving body (19) for moving the pin body (17) forward and backward with respect to the positioning recess (22a, 22b) . The composite mold according to claim 1 ,
The first mold part (9a) and the second mold part (9b) are provided with a predetermined angle in the rotating direction of the rotating mold (9), and the fixed mold (1) and the A mold for composite molding that is configured to alternately enter and exit the movable mold (2) . The composite mold according to any one of claims 1 and 2, wherein
The fixed mold (1) is provided with a first gate (24) for molding by the first cavity (14) and a second gate (25) for molding by the second cavity (15). A mold for composite molding. A mold for composite molding according to any one of claims 1 to 3,
The said pin body (17) and the said 3rd drive body (19) are the molds for composite molding which are provided in the said fixed metal mold | die (1) .

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