JP5394728B2 - Molding method for multicolor molded products and molds for multicolor molding - Google Patents

Description

  The present invention relates to a fixed side mold attached to a fixed platen, and a movable side mold connected to the fixed platen via a plurality of tie bars and attached to a movable platen that is opened and closed with respect to the fixed platen. And a molding method for obtaining a multicolor molded product using a multicolor molding die comprising a reversing or rotating side die provided between the fixed side mold and the movable side mold, and Supply method for supplying a working fluid or electric power for driving a temperature adjusting fluid, a rotating die or a moving core provided in the rotating die to the rotating die, and a multicolor molding die It is about.

  Two colors for integrally molding a molded product of different colors by injecting a first resin material in primary molding and injecting a second resin material having a different color from the first resin material in secondary molding Both the molding method and the injection molding method for obtaining a laminate by injecting the second resin material on the first resin material are well known as composite molding methods. A mold used for carrying out such a molding method is also well known, and is composed of, for example, a fixed-side mold and a rotary slide mold that slides rotationally around the center axis of the mold. The rotary slide mold is provided with a concave portion for primary molding and a concave portion for secondary molding in the same parting surface. Therefore, when the stationary mold and the rotary slide mold are clamped at the primary molding position, a primary molding cavity is formed, and when the first resin material is injected into this cavity, the primary molding portion is molded. Therefore, the primary molding portion is left in the fixed mold and the mold is opened, and the rotary slide mold is slid to the secondary molding position and clamped. If it does so, the cavity for secondary shaping | molding will be comprised by the primary shaping | molding part and the recessed part for secondary shaping | molding. When the second resin material is injected into the cavity for secondary molding, a two-color molded product or a laminated product composed of two layers is obtained.

  Further, an injection molding method for molding one composite molded product from three semi-molded products has been proposed by the present applicant, for example, in Patent Document 1. A mold used for carrying out this molding method is composed of a slide mold and two slide cores. The slide core slides in a direction different from the slide direction of the slide mold, and the slide mold and the slide core have a position where the cavity of the slide mold and the cavity of the slide core are separated from each other, and a position where they are closely aligned with each other. Is supposed to be adopted. Therefore, in the primary molding, three half-molded products are simultaneously molded in the slide mold and slide core, the slide core is opened with the latter half molded product remaining in the slide mold and slide core, and the slide The mold and the slide core are slid to collect the semi-molded product at a predetermined position. When the molten resin is injected into the joined portion that has been assembled and clamped by secondary molding, a composite molded product in which three semi-molded products are integrated in the slide mold and the slide core is obtained.

JP 2000-153538 A JP-A-8-108450

  Patent Document 2 includes a fixed-side mold, a movable-side mold that is opened and closed with respect to the fixed-side mold, and a rotary plate that is provided between these molds and that rotates and slides. A color mold is shown. A core mold is formed on the parting surface of the rotating plate facing the fixed mold. On the other hand, on the side facing the intermediate plate of the fixed mold, three first, second and third recesses corresponding to the core mold are provided at intervals of 120 degrees in the circumferential direction. Yes. In the first and second recesses, a gate is provided in the fixed-side mold so as to be directed from the outside of the radius toward the center. On the other hand, in the third recess, a gate provided on the back side of the intermediate plate so as to go from the outside of the radius toward the center is opened. Therefore, the intermediate plate can be slid 120 degrees at a time to obtain a molded product of three colors. However, since the third gate is provided on the back side of the intermediate plate, the gate is placed on the surface of the molded product. There are no traces.

  As described above, an injection molding method for obtaining a two-color molded product or a laminated molded product having two layers is conventionally well known, and a molding apparatus for a composite molded product having three colors is also proposed by Patent Documents 1 and 2 and the like. Therefore, these methods can be applied to mold multicolor molded products. However, when a multicolor molded product is molded by a conventionally known injection molding method or the injection molding method described in Patent Documents 1 and 2, the concave portion for primary molding, the concave portion for secondary molding, etc. are formed in the same party of the mold. It is necessary to provide it on the surface. Then, a large mold is required as compared with the molded product, and a large mold clamping device for clamping such a large mold is required. There are also problems with injection devices that inject molten resin. The nozzle of the injection device is designed to touch the fixed mold through the opening on the fixed platen from the back to the surface of the fixed platen. A plurality of different injection devices are required. It is difficult to arrange such a plurality of injection devices so as not to interfere with each other. In particular, when there are three or more injection devices, it is practically impossible to arrange them so as not to interfere with each other.

  Japanese Patent Application No. 2008-230206 has proposed an injection molding machine that does not require a large mold or a clamping device, and in which a plurality of injection devices do not interfere with each other. As shown in FIG. 4, the injection molding machine 71 proposed by the present applicant includes multicolor molding dies 85, 87, 88, a mold clamping device 72, and first and second injection devices. 74 and 75. The multi-color molding die is rotated around an axis 89 on a stationary die 85 attached to a stationary platen 77, a movable die 87 attached to a movable platen 79, and a rotating die holding frame 84. It is comprised from the rotation side metal mold | die 88 attached freely. First and second recesses 91 and 92 are provided on both sides of the rotation side mold 88. In such a multicolor molding die, the first injection device 74 is provided so as to touch the locating ring provided on the fixed side die 88 from the back surface of the fixed plate 77, and the second injection device. 75 is provided so as to touch a sprue provided in the movable mold 87. The mold clamping device 72 includes a fixed platen 77, a fixed platen 77, a movable platen 79 connected via a plurality of tie bars 78, 78,..., A mold clamping housing 81, a movable platen 79, and a mold clamping unit. It consists of a toggle mechanism 82 provided between the housings 81 and a rotating mold holding frame 84 provided between the fixed platen 77 and the movable platen 79. When the mold is clamped in such an injection molding machine 71, the fixed mold 85, the rotary mold 88, and the movable mold 87 are clamped. A first resin material is injected from the first injection device 74 into a cavity formed by the fixed side mold 85 and the first concave portion 91 of the rotation side mold 88 to form a primary molded product. The mold is opened with the primary molded product remaining in the first recess 91, and the rotary mold 88 is rotated 180 degrees. That is, it is reversed. Then, the primary molded product and the movable side mold 87 face each other. The second resin material is injected from the second injection device 75 into the cavity formed by the primary molding and the movable-side mold 87 by clamping and a molded product having two colors is obtained.

  According to the multicolor molding die proposed by the present applicant, it is sufficient to provide only one concave portion or one core die on one parting surface of the die. Neither a large mold nor a large mold clamping device is required compared to the size of the product. Furthermore, since the mold clamping force acts simultaneously between the fixed mold and the rotating mold and between the rotating mold and the movable mold, the mold can be clamped efficiently. Further, according to the injection molding machine, the first injection device 74 is provided toward the fixed mold 85 and the second injection device 75 is provided toward the movable mold 87, that is, the first injection. Since the device 74 and the second injection device 75 are arranged at different locations, they do not interfere with each other. Therefore, if the multicolor molding die and the injection molding machine proposed by the present applicant are used, the conventional problems can be solved and a multicolor molded product can be easily obtained. However, there are some problems to be improved. That is, it is necessary to supply or discharge a temperature adjusting liquid or fluid such as cooling water or heating water for adjusting the temperature, and a mold provided with a driven member such as a moving core or a piece. In this case, it is necessary to supply the working fluid to the driving cylinder of the driven member, or to supply power for driving the solenoid, for example. Therefore, a predetermined hose that supplies such fluid or a power supply line that supplies power is connected to the rotating side mold. In the rotation side mold, it is necessary to provide a hose or a power supply line having a predetermined length so that the hose and the power supply line follow even when the mold is rotated. Such a hose or a power supply line may be loosened temporarily when the rotating side mold rotates, and may be entangled with other devices. Further, if a hose or power supply line that is loosened during mold clamping is sandwiched between molds, the hose or power supply line may be damaged or the mold may be damaged. Although it is conceivable that a rotary joint having a predetermined seal structure is provided at the center of rotation of the rotary side mold instead of the hose, the liquid can be supplied and discharged. However, only one rotary joint can be provided. Can only flow. That is, the temperature adjusting liquid and the working fluid cannot be supplied and discharged simultaneously. Furthermore, the seal structure often wears and causes accidents such as liquid leakage.

  The present invention has been made in view of the above-described problems, and although these include a conduit for supplying and discharging a temperature adjusting fluid and a working fluid, a power supply line, etc. Multi-color molding that eliminates the need for a seal structure that causes wear and accidents such as liquid leaks on the pipe line so that the pipe line and power supply line do not get entangled with other devices or are pinched between molds during mold clamping An object of the present invention is to provide a molding die and to provide a molding method for obtaining a multicolor molded product using such a multicolor molding die.

  According to the present invention, in order to achieve the above object, the multicolor molding die is a fixed side die attached to the fixed platen and a movable plate attached to a movable platen that is opened and closed with respect to the fixed platen. Rotation that is supported in a rotatable mold support base that is rotatably provided between the side mold and the fixed platen and the movable platen so as to be able to rotate or invert and take the first and second rotation positions. It consists of a side mold. Then, the temperature adjusting fluid for adjusting the temperature of the rotating side mold and the working fluid supply / exhaust line for driving the accessories of the rotating side mold, or the power supply line is a hollow rotation of the rotating mold support base. It is configured to be provided inside the shaft.

That is, in order to achieve the above-mentioned object, the invention according to claim 1 is a movable side attached to a fixed side mold attached to the fixed platen and a movable platen opened and closed with respect to the fixed platen. Attached to a rotating mold support table that is provided between the side mold, the fixed platen and the movable platen and is slid in the mold opening / closing direction, and is rotated or inverted. The rotating side mold is provided with two parting surfaces that come into contact with the fixed side mold and the movable side mold when the mold is clamped, In the multicolor molding die in which the parting surface of a different surface comes into contact with each of the fixed side die and the movable side die when the rotation side die is reversed and clamped , Clamping the multi-color molding die, and the fixed-side die The primary molding in which a first resin is injected and filled into the first cavity constituted by the rotary side mold to obtain a primary molded product, and remains in the movable side mold and the rotary side mold. The second resin is injected and filled into the second cavity constituted by the primary molded product, and the secondary molding to obtain a multicolor molded product having two layers is performed substantially simultaneously, and the multicolor molding is used. Open the mold, take out the multi-color molded product consisting of the two layers, leave the primary molded product in the rotary side mold and invert the rotary side mold to make the multi-color molding mold Clamping is performed, and primary molding for obtaining a primary molded product by injecting and filling a first resin into a first cavity constituted by the fixed mold and the rotary mold, and the movable mold A second resin is injected and filled into a second cavity formed by the mold and the primary molded product remaining in the rotating side mold. When the secondary molding for obtaining a multi-color molded product consisting of two layers is carried out substantially simultaneously, and the molding of one multi-layer molded product consisting of two layers for each mold opening in the same manner, A temperature adjusting fluid that adjusts the temperature of the mold, an operating fluid or electric power that drives the rotating side mold, and a temperature adjusting fluid path that is inserted through a vertical hollow rotating shaft below the rotating table, It is configured to supply / discharge or supply power from a working fluid path or a power supply line .
According to a second aspect of the present invention, there is provided a fixed-side mold attached to a fixed platen, a movable-side mold attached to a movable platen that is opened and closed with respect to the fixed platen, the fixed platen, and the Rotation side metal which is provided between the movable platen and is attached to the rotary base of the rotary mold support which is slid in the mold opening / closing direction and takes the first and second rotational positions. When the mold is clamped with the rotation side mold at the first rotation position, one parting surface of the rotation side mold is on the fixed side mold, and the other parting surface is on the movable side. When the mold is brought into contact with the mold and clamped, and the mold on the rotating side is set to the second rotational position, the other parting surface is placed on the fixed mold and the one parting surface is placed on the mold. Multi-color composition that comes in contact with the movable mold and is clamped In die, the rotary-side mold temperature regulating fluid to regulate the temperature of working fluid or power to drive the rotating side die is inserted into the hollow of the rotary shaft of the vertical lower portion of the turntable It is configured to be supplied from a temperature adjusting fluid path, a working fluid path, or a power supply line .
According to a third aspect of the present invention, there is provided a fixed side mold attached to the fixed platen, a movable side mold attached to a movable plate that is opened and closed with respect to the fixed platen, and the fixed platen. Rotation that is provided between the movable platen and the movable platen and is attached to the rotary base of the rotary mold support base that is slid in the mold opening / closing direction and takes the first and second rotational positions. When the mold is clamped with the rotation side mold in the first rotation position, one parting surface of the rotation side mold is on the fixed side mold and the other parting surface is on the side. When the mold is brought into contact with the movable side mold and clamped, and the rotary side mold is clamped at the second rotational position, the other parting surface is brought into contact with the fixed side mold and the one parting surface is clamped. Are brought into contact with the movable molds and clamped. A multicolor molding die, wherein the turntable comprises a hollow rotating shaft in its lower, interior temperature regulating fluid path communicating from the outside to the rotary-side mold of the rotary shaft, the working fluid passage or A power supply line is provided.
Furthermore, the invention according to claim 4 is the multicolor molding die according to claim 3, wherein the fluid path is formed of a flexible material.

  As described above, according to the present invention, the multi-color molding die includes the fixed side die attached to the fixed platen and the movable side die attached to the movable platen that is opened and closed with respect to the fixed platen. When the mold is clamped to the rotating side mold, the rotating side mold is supported by a rotating mold supporting base provided between the fixed plate and the movable plate so as to be rotatable or reversible. There are two parting surfaces that come into contact with the fixed mold and the movable mold. When the rotating mold is reversed and clamped, the fixed mold and the movable mold are each Since the parting surfaces of different surfaces are in contact with each other, there is no need for a particularly large mold or large mold clamping device compared to the size of the molded product, and the mold clamping force is fixed. Clamps efficiently because it acts simultaneously between the side mold and the rotary mold and between the rotary mold and the movable mold It is possible. In addition, since the mold is configured as described above, the injection device can be arranged also on the movable mold, and even if a plurality of injection devices are provided, they do not interfere with each other. When a multicolor molded product is molded by such a multicolor molding die, the multicolor molding die is clamped to the first cavity constituted by the fixed side mold and the rotary side mold. A second cavity is formed in a second cavity constituted by primary molding for injection-filling the first resin to obtain a primary molded product, and the primary molded product remaining in the movable side mold and the rotary side mold. The secondary molding to obtain a multi-color molded product consisting of two layers by injection-filling the resin is carried out substantially simultaneously, and the multi-color molded product consisting of two layers is taken out by opening the multi-color molding die. Since the next molded product remains in the rotating side mold, the rotating side mold is reversed and the mold is clamped again, so that a multicolor molded product consisting of one two layers is obtained each time the mold is opened. Production efficiency is high. Further, in such a multicolor molding die, a hollow rotating shaft is provided at the substantial rotation center of the rotating die support base, and the rotating die support base can rotate integrally with the rotating shaft. In addition, since it is supported by a member that moves in the mold opening and closing direction, a temperature adjusting fluid path, a working fluid path, or a power supply line that leads from the outside to the rotating side mold is provided inside the rotating shaft. That is, since the temperature adjusting fluid path, the working fluid path, or the power supply line is provided on the central axis of rotation, the fluid path and the power supply line do not loosen even if the rotation side mold rotates. They are not entangled with other devices, or are sandwiched between molds during mold clamping, so that the fluid path and power supply line are not damaged or the mold is not damaged. According to another invention, since the pipe is made of a flexible material, there is no need to provide a special seal structure that may wear out and cause a liquid leakage accident, and the pipe is made safe and inexpensive. The effect that it can be provided is further obtained. Furthermore, according to another invention, in the multicolor molding die according to claim 1 or 2, the rotating die support base is guided by a tie bar connecting the fixed platen and the movable platen to open and close the die. The rotating shaft is integrated with the rotating table, and the rotating shaft can be freely rotated by the bearing mechanism provided on the mounting table. Since it is configured to be supported by a bearing, the structure becomes relatively simple, and a multicolor molding die can be provided at a low cost.

  Embodiments of the present invention will be described below. An injection molding machine 1 to which a multicolor molding die 5 according to the present embodiment is attached is schematically shown in a plan view of FIG. 1A and a side view of FIG. As shown, the multi-color molding die 5, the mold clamping device 2 that opens and closes these molds 5, and the first and second injection devices 3 and 4 are configured. The mold clamping device 2 includes a fixed platen 7, a movable platen 8, a mold clamping housing 9, four tie bars 11, 11 that connect the fixed platen 7 and the mold clamping housing 9 and guide the movable platen 8. The toggle mechanism 13 is provided between the mold clamping housing 9 and the movable platen 8. As will be described in detail later, the rotary mold support 14 which is a feature of the present embodiment is guided by two tie bars 11 and 11 so as to slide in the left-right direction or the mold opening / closing direction in FIG. It has become. In addition, a table that rotates within a range of 0 to 180 degrees, that is, a rotating table 36 is provided above the rotating mold support table 14. The rotating side mold 17 is attached to the turntable 36.

  The multicolor molding die 5 is the same as the stationary die 16 attached to the stationary platen 7, the rotating die 17 attached to the rotating die support table 14 and the movable platen 8. The movable side mold 18 is attached to the movable side mold 18. A relatively low convex portion 21 is provided at the center of the parting surface of the fixed mold 16. The convex portion 21 constitutes a cavity for primary injection molding when the mold is clamped. The fixed side mold 16 is provided with a sprue 22 so as to cross the fixed side mold 16. The sprue 22 communicates with a gate 23 opened in the cavity. The nozzle of the first injection device 3 touches the sprue 22 configured in this way. The rotating side mold 17 is provided with two parting surfaces, that is, a first parting surface 24 and a second parting surface 25 on opposite sides. First and second concave portions 27 and 28 having the same shape and a predetermined depth are formed in substantial center portions of the first and second parting surfaces 24 and 25, respectively. In the position shown in FIG. 1, the parting surface to be clamped with the fixed side mold 16 is the first parting surface 24, but the rotation side mold 17 is arranged on the rotary mold support base 14. Since it rotates in the range of 0 to 180 degrees together with the turntable, that is, it is reversed, the second parting surface 24 is clamped with the fixed mold 16 when the mold is clamped at the reverse position. Therefore, one of the first and second concave portions 27 and 28 forms a primary injection molding cavity together with the convex portion 21 of the fixed side mold 16 depending on the rotational position of the rotational side mold 17. A relatively shallow large-diameter hole is drilled in the center of the parting surface of the movable mold 18, and a small-diameter hole is drilled from the bottom of the hole. A concave portion 29 having a two-stage diameter is opened by these holes. The recess 29 constitutes a cavity for secondary molding when the mold is clamped. A sprue 31 is provided at a position above the movable side mold 18 so as not to interfere with the mold opening / closing operation. The sprue 31 communicates with a gate 32 opened at the bottom of the concave portion 29 of the movable side mold 18. The nozzle of the second injection device 4 touches the sprue 31.

  The rotary mold support 14 according to the present embodiment will be described in detail with reference to the perspective view of FIG. The rotary mold support 14 is composed of a gantry 34 that is guided by the tie bars 11, 11 and slides in the axial direction, that is, the mold opening / closing direction, and a rotator 36 that rotates within a range of 0 to 180 degrees on the gantry 34. Yes. The gantry 34 includes guide portions 38 and 38 guided by the two tie bars 11 and 11, a circular retainer 39 having a predetermined plate thickness formed integrally with the guide portions 38 and 38 and having a disk shape, and the circular retainer It is comprised from the cylindrical bearing part 40 etc. which were provided in the downward direction of the perpendicular direction from the center of the lower surface of 39. As shown in FIG. 1 (a), the gantry 34 is supported on the bed B so as to be slidable in the mold opening / closing direction or in the axial direction. A specific support mechanism is shown in FIG. Not. The guide portions 38 and 38 are provided with cylindrical axial holes through which the tie bars 11 and 11 are inserted, that is, guide holes 42 and 42. The inner diameter of the guide hole 42 is slightly larger than the outer diameter of the tie bars 11, 11. Therefore, the gantry 34 is guided by the tie bars 11 when the mold is opened and closed and can slide smoothly in the direction of the arrow Y1. On the upper surface of the circular retainer 39, a ring-shaped circular rail 43 that supports or guides the turntable 36 is provided. Accordingly, the turntable 36 is guided by the circular rail 43 of the circular retainer 39 and smoothly rotates in the directions of the arrows Y2 and Y3. The circular retainer 39 also has a role of maintaining the level of the turntable 36, and also prevents the rotation side mold 17 attached to the turntable 36 from being inclined.

  The turntable 36 has a rectangular plate shape, and the mold mounting plate 45 to which the rotating side mold 17 is attached, and the center vertically on the lower surface of the mold mounting plate 45 are perpendicular to the above. It consists of a hollow rotating shaft 46 that is integrally formed with the mold mounting plate 45. The hollow rotating shaft 46 is inserted into the cylindrical bearing portion 40 of the gantry 34 and is supported so as to be smoothly rotatable by a bearing mechanism including a bearing (not shown). A through hole is formed in the hollow rotating shaft 46 and the mold mounting plate 45 in the axial direction of the rotating shaft 46. The through hole adjusts the temperature of the mold. It becomes the hole 47 for piping through which. The die mounting plate 45 is provided with piping grooves 49 and 49 having a square cross section communicating from the midpoint of the long side of the rectangle to the piping hole 47. Therefore, a pipe line or the like piped in the pipe hole 47 can be drawn out to the outside, that is, the rotation side mold 17 through the pipe grooves 49 and 49. A driven pulley 50 is fixed to the lower end portion of the rotating shaft 46, and a belt 53 is hung between the driven pulley 50 and a drive pulley 52 of a servo motor 51 provided at a predetermined position of the gantry 34. It has been turned. Therefore, when the servo motor 51 is driven, the turntable 36 can be rotated in the range of 0 to 180 degrees.

  Such a rotating mold support 14 is supplied with temperature adjusting fluid supply / discharge pipes 54 and 54 for supplying or draining a temperature adjusting fluid such as cooling water or hot water for adjusting the temperature of the mold, and the mold. For example, hydraulic oil supply and discharge pipes 55 and 55 for supplying and discharging hydraulic oil for driving moving cores, pieces, and the like are provided. Specifically, these supply / exhaust pipes 54, 55,... Are formed of rubber or plastic flexible material, and are inserted into the piping hole 47, that is, inserted into the hollow rotating shaft 46. After being pulled out through the piping grooves 49 and 49 and piped along the long side of the mold mounting plate 45 of the turntable 36, the mold mounting plate 45 is not shown in FIG. It is connected to the attached rotating side mold 17. That is, since the supply / discharge pipes 54, 55,... Are piped from the center axis of rotation of the turntable 36, the supply / discharge pipes 54, 55 are not loosened even if the turntable 36 and the rotation side mold 17 are rotated. Absent. In the present embodiment, a predetermined portion of the piping grooves 49, 49 of the supply / exhaust pipes 54, 55,... Is formed from the metal pipes 57, 57, but the supply / exhaust pipes 54, 55,. It is also possible to configure the entire length of only a conduit made of a flexible material.

  Next, a molding example in which a two-color molded product is molded by the injection molding machine 1 to which the multicolor molding die 5 according to the present embodiment is attached will be described. As shown in FIG. 3A, the rotation-side mold 17 is clamped at a rotational position of 0 degrees. Then, the first parting surface 24 of the rotary mold 17 and the fixed mold 16 are clamped, and the convex portion 21 of the fixed mold 16 and the first concave portion 27 of the rotary mold 17 are clamped. A primary molding cavity C1 is formed. As shown in FIG. 3A, the first resin material is injected from the first injection device 3 to form a primary molded product J. The mold is opened after being cooled and solidified. Then, the primary molded product J remains on the rotating side mold 17 due to the difference in the shape of the cavity. As shown in FIG. 3C, the turntable 36 is driven to rotate the rotation side mold 17 to a rotation position of 180 degrees, that is, a reverse position. Next, when the mold is clamped, as shown in FIG. 3D, the primary molded product J remaining in the rotary mold 17 and the concave portion 29 of the movable mold 18 are used for secondary molding. The cavity C2 is formed, and the second concave portion 28 of the rotating side mold 17 and the convex portion 21 of the fixed side mold 16 constitute a primary forming cavity C1. As shown in FIG. 3E, a second resin material having a color or material different from that of the first resin is injected from the second injection device 4 into the cavity C2 for secondary molding. Then, the primary molded product J and the secondary molded part K are integrally molded. On the other hand, the first molded material J is molded by injecting the first resin material from the first injection apparatus 3 into the cavity C1 for primary molding. The mold is opened after being cooled and solidified. Then, a two-color molded product JK is obtained as shown in FIG. Since the primary molded product J remains in the rotation side mold 17, the rotation side mold 17 is returned to the 0 degree rotation position. Thereafter, when molding is performed in the same manner as described above, the temperature adjusting fluid is supplied to and discharged from the rotating side mold 17 through the supply and discharge pipes 54 and 55 as necessary. Moreover, when driven members, such as a moving core and a piece, are provided in the rotation side metal mold | die 17, the hydraulic fluid which drives these driven members is supplied / discharged similarly. When the molding is continuously performed as described above, one two-color molded product JK is obtained each time the multicolor molding die 5 is opened.

  The injection molding machine according to the embodiment of the present invention is not limited to the above embodiment and can be implemented in various forms. For example, the gantry 34 constituting the rotary mold support 36 is described as being guided by two tie bars, but instead of being guided by the tie bars, on the bed on which the injection molding machine is installed. Rails can also be provided and guided by lake rails. Further, the gantry 34 may be constituted by a frame body formed in a cross beam shape outside the four tie bars. If it does in this way, the comparatively large rotation side metal mold | die 17 can be attached. In addition, it is described that hydraulic oil is supplied when the rotating side mold 17 is provided with driven members such as moving cores and pieces, but these driven parts are driven by air. In the case of being driven by an electromagnetic solenoid, the power supply line is drawn from the outside into the rotating shaft of the rotating mold support base and pulled out from the piping groove 49. It can also be connected to the rotating side mold 17.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the two-color molding metal mold | die and injection molding machine which concern on embodiment of this invention in a partial cross section, The (a) is the top view, The (a) is a side view. It is a perspective view which shows the rotating die support stand which concerns on embodiment of this invention in a partial cross section. It is a figure which shows the example of a shaping | molding which shape | molds the molded product which consists of two colors with the metal mold | die for 2 color molding which concerns on embodiment of this invention, and an injection molding machine, The (a)-(f) is in each molding step. It is a top view which shows a certain 2 color molding die and injection molding machine in a partial cross section. It is a top view which shows the multicolor molding die and injection molding machine which are proposed by the present applicant in a partial cross section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Injection molding machine 2 Clamping apparatus 3 1st injection apparatus 4 2nd injection apparatus 5 Mold for multicolor molding 7 Fixing plate 8 Clamping housing 9
11, 11 Tie bar 14 Rotating mold support 16 Fixed mold 17 Rotating mold 18 Movable mold 36 Rotating table 39 Circular retainer 45 Mold mounting plate 46 Hollow rotating shaft 47 Piping hole 49 Piping groove 54 55 Supply / exhaust pipe

Claims (4)

A fixed-side mold attached to the fixed platen; a movable-side die attached to a movable platen that is opened and closed with respect to the fixed platen; and provided between the fixed platen and the movable platen. It consists of a rotating side mold that is attached to a rotating base of a rotating mold support that is slid in the mold opening and closing direction and that is rotated or reversed .
The rotating side mold is provided with two parting surfaces that come into contact with the fixed side mold and the movable side mold when the mold is clamped, and the rotating side mold is inverted and clamped. Then, in the mold for multicolor molding in which the parting surfaces of different surfaces come into contact with each of the fixed side mold and the movable side mold,
Clamping the multi-color molding die and injecting and filling a first resin into a first cavity constituted by the stationary die and the rotating die 1 to obtain a primary molded product 1 A multicolor molded product comprising two layers by injection-filling a second resin into a second cavity formed by secondary molding and the primary molded product remaining in the movable mold and the rotary mold. Substantially simultaneously with the secondary molding to obtain
Open the multi-color molding die and take out the multi-color molded product consisting of the two layers, leave the primary molded product in the rotary side mold, and reverse the rotary side die,
Clamping the multi-color molding die and injecting and filling a first resin into a first cavity constituted by the stationary die and the rotating die 1 to obtain a primary molded product 1 Multicolor molding consisting of two layers by injection-filling a second resin into a second cavity constituted by secondary molding and the primary molded product remaining in the movable mold and the rotary mold The secondary molding to obtain the product is carried out substantially simultaneously, and in the same manner, when molding a multicolor molded product consisting of one two layers for each mold opening,
The temperature adjusting fluid that adjusts the temperature of the rotating side mold, the working fluid that drives the rotating side mold, or the electric power is inserted into a vertical hollow rotating shaft below the rotating table. A method for forming a multicolor molded product, characterized in that supply / discharge or power feeding is performed from a fluid path, a working fluid path, or a power supply line . A fixed-side mold attached to the fixed platen; a movable-side die attached to a movable platen that is opened and closed with respect to the fixed platen; and provided between the fixed platen and the movable platen. It consists of a rotating side mold that is attached to a rotating base of a rotating mold support base that is adapted to be slid in the mold opening and closing direction and is adapted to take the first and second rotational positions.
When the rotary side mold is clamped at the first rotational position, one parting surface of the rotary side mold contacts the fixed side mold and the other parting surface contacts the movable side mold. When the mold is brought into contact and clamped and the rotary mold is set to the second rotational position, the other parting surface becomes the fixed mold, and the one parting surface becomes the movable mold. In multi-color molding molds that are designed to come into contact with each other and be clamped,
The temperature adjusting fluid that adjusts the temperature of the rotating side mold, the working fluid that drives the rotating side mold, or the electric power is inserted into a vertical hollow rotating shaft below the rotating table. A fluid or power supply method for a multicolor molding die, characterized in that the fluid or power is supplied from a fluid path, a working fluid path or a power supply line . A fixed-side mold attached to the fixed platen; a movable-side die attached to a movable platen that is opened and closed with respect to the fixed platen; and provided between the fixed platen and the movable platen. It consists of a rotating side mold that is attached to a rotating base of a rotating mold support base that is adapted to be slid in the mold opening and closing direction and is adapted to take the first and second rotational positions.
When the rotary side mold is clamped at the first rotational position, one parting surface of the rotary side mold contacts the fixed side mold and the other parting surface contacts the movable side mold. When the mold is brought into contact and clamped and the rotary mold is set to the second rotational position, the other parting surface becomes the fixed mold, and the one parting surface becomes the movable mold. Multi-color molding molds that come into contact with each other and are clamped,
The rotary table is provided with a hollow rotary shaft at a lower portion thereof, and a temperature adjusting fluid path, a working fluid path, or a power supply line leading from the outside to the rotary side mold is provided inside the rotary shaft. A multi-color mold for molding. The multicolor molding die according to claim 3, wherein the fluid path is formed of a flexible material.

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