JP2009119692A - Rotary type injection molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary type injection molding machine capable of rapidly adjusting the temperature of a mold to a desired temperature. <P>SOLUTION: The rotary type injection molding machine 1 includes a rotary body 2, a support 3 for supporting the rotary body 2 rotatable and a temperature regulating liquid path. The temperature regulating liquid path includes: rotary body side liquid paths 2e, 2f provided in the rotary body 2 and having opening parts 2e1, 2e2, 2f1, 2f2; and primary liquid paths 3b, 3c and a secondary liquid paths 3d, 3e provided in the support 3 and having opening parts 3b1-3e1. The opening parts 3b1, 3c1, 3d1, 3e1 are positioned on the circumference on which the opening parts 2e1, 2e2, 2f1, 2f2 of the rotary body side liquid paths 2e, 2f are rotated. Circular arc grooves 3f-3i which extends circular arc-like by a prescribed length on the circumference and to which the opening parts 3b1-3e1 are opened are formed on the support 3 and the rotary body side liquid paths 2e, 2f are rotated with the rotation of the rotary body 2 through the circular arc grooves 3f-3i while communicating with the primary liquid paths 3b, 3c and the secondary liquid paths 3d, 3e. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rotary injection molding machine that performs injection molding on a plurality of stages by rotating a mold. In particular, the present invention relates to a rotary injection molding machine that performs injection molding for each stage while adjusting the temperature of a mold with a temperature control liquid.

2. Description of the Related Art Conventionally, rotary injection molding machines that perform injection molding while adjusting the temperature of a mold with a temperature control liquid are known (for example, Patent Documents 1 to 3). These molding machines have a central axis, a rotary table that rotates around the central axis, and a mold provided on the rotary table. A temperature adjustment liquid passage is formed across the rotary table and the central axis, and the temperature adjustment liquid supplied from the temperature adjustment device flows through the temperature adjustment liquid passage to adjust the temperature of the mold. A structure that switches the temperature adjustment liquid to the mold in conjunction with the rotation of the rotary table is also known (for example, Patent Document 1). This structure has a plurality of vertical liquid paths formed on the central axis and a plurality of horizontal liquid paths formed on the rotary table, and the central axis and the rotary table slide between the vertical liquid path and the horizontal liquid path. It has an opening that opens to the surface. The opening of the horizontal liquid path rotates with the rotary table, and the position of the opening of one vertical liquid path coincides with each stage. As a result, the horizontal liquid path communicates with one vertical liquid path for each stage, and the temperature adjusting liquid adjusted to different temperatures is supplied to the mold side.
Japanese Utility Model Publication No. 4-7114 JP-A-11-105060 JP 2006-347015 A

  However, after the mold is moved to the stage, the temperature adjustment liquid at a desired temperature starts to be supplied. Therefore, in order to bring the mold to a desired temperature, a predetermined time is required after moving to the stage. Accordingly, an object of the present invention is to provide a rotary injection molding machine that can improve productivity and quality of a molded product by setting a mold temperature to a desired temperature earlier than a conventional molding machine. For example, by raising the mold temperature during the primary molding, the flow of the primary material is improved and insufficient filling of the primary material is prevented to improve the quality of the molded product. To provide a rotary injection molding machine capable of improving the quality by molding the secondary material while keeping the primary material in a predetermined shape by lowering the mold temperature quickly at the time of secondary molding. With the goal.

  In order to solve the above-mentioned problems, the present invention is a rotary injection molding machine having a configuration as described in each claim. That is, according to the first aspect of the present invention, a rotary injection molding machine having a rotating body, a support, and a temperature adjusting liquid passage, the temperature adjusting liquid passage being provided in the rotating body and opening to the support side. And a primary liquid path and a secondary liquid path that are provided on the support and have an opening that opens to the rotating body side. The opening part of a primary liquid path and a secondary liquid path is located on the circumference which the opening part of a rotary body side liquid path rotates. One of the support body and the rotating body extends in an arc shape with a predetermined length on the circumference and has an opening of any one of the primary liquid path, the secondary liquid path, and the rotating body side liquid path. An arc groove is formed, and the rotating body side liquid path rotates while communicating with at least one of the primary liquid path and the secondary liquid path via the arc groove when the rotating body rotates.

  Therefore, during the rotation of the rotator, the rotator-side liquid path communicates with the primary liquid path or the secondary liquid path via the arc groove. Therefore, the temperature adjustment liquid starts to flow toward the mold side during the rotation of the mold, and the temperature of the mold starts to be adjusted by the temperature adjustment liquid during the rotation. As a result, the temperature of the mold is adjusted faster than the conventional one, which improves productivity and product quality. Further, the conventional molding machine has a configuration that is not easy to manufacture because it is necessary to pinpoint the opening of the liquid passage on the rotating body side and the opening of the liquid passage on the support side (see Patent Document 1). On the other hand, the present invention has an arc groove extending in an arc shape, and therefore has a long communication position, and thus has a configuration that is easier to manufacture than the conventional one.

  According to the second aspect of the present invention, the arc groove is formed in the support and the first arc groove formed in the opening of the primary liquid passage and the opening of the secondary liquid passage formed in the support is opened. And a second arc groove extending in an arc shape on the same circumference as the first arc groove. The rotating body side liquid path rotates while communicating with the primary liquid path via the first arc groove when the rotating body rotates, and then rotates while communicating with the secondary liquid path via the second arc groove. . Therefore, when the rotating body rotates, the temperature adjusting liquid flowing in the rotating body side liquid path changes from the temperature adjusting liquid on the primary liquid path side to the temperature adjusting liquid path on the secondary liquid path side during the rotation. On the other hand, when the rotating body is reversed, the temperature adjustment liquid on the secondary liquid path side is changed to the temperature adjustment liquid on the primary liquid path side during the reverse rotation. Therefore, when the mold rotates between the two stages, the temperature starts to be adjusted before reaching each stage.

  According to the invention described in claim 3, the support body has a support table that rotatably supports the lower surface of the rotary table of the rotary body. The first and second arc grooves are formed on the upper surface of the support table, and the rotating body side liquid passage has an opening that opens on the lower surface of the rotating table. Therefore, a swivel is constituted by the support table and the rotary table. The swivel can have a relatively large diameter. For example, the swivel can have a larger diameter than that of the central axis in a conventional configuration in which the rotating body rotates around the central axis. Therefore, it is easy to form an arc groove on the upper surface of the support table.

  According to the invention described in claim 4, the primary temperature adjustment liquid is allowed to flow to the primary liquid path side, the secondary temperature adjustment liquid having a temperature lower than that of the primary temperature adjustment liquid is allowed to flow to the secondary liquid path side, and the arc of the second arc groove The length is set longer than the arc length of the first arc groove, and when the rotating body rotates, the rotor-side liquid passage communicates with the first arc groove and then communicates with the second arc groove. Therefore, for example, when the mold rotates from the primary stage to the secondary stage, the temperature is increased by the primary temperature adjusting liquid in the primary stage. In addition, insufficient filling of the primary material in the primary stage is suppressed, and the mold transferability is improved. When the mold rotates from the primary stage to the secondary stage, the mold starts to be cooled by the secondary temperature adjusting liquid at a relatively early stage during the rotation. For this reason, in the secondary stage, the primary material cools and hardens, and the amount of the primary material dripping when the secondary material is injected is reduced. This improves the quality of the product.

(Embodiment 1)
The first embodiment will be described with reference to FIGS. As shown in FIG. 1, a molding machine 1 is a vertical rotary injection molding machine, and includes a primary mold 5a, a secondary mold 5b, a rotating body 2 provided between them, and a rotating body 2. It has the support body 3 which supports so that rotation is possible. The rotating body 2 has a disc-shaped rotating table 2d and a central shaft 2c standing at the center of the rotating table 2d, and rotating molds 2a and 2b having cavities are mounted on the central shaft 2c.

  The support 3 has a disk-shaped support table 3a as shown in FIGS. The support table 3a is disposed below the rotary table 2d and rotatably supports the rotary table 2d. Therefore, a swivel is constituted by the support table 3a and the rotary table 2d. The molding machine body 6 has a base portion 6a, and a secondary mold 5b is attached to the base portion 6a. A support table 3a and a slide base 6b are movably attached to the base part 6a, and a primary mold 5a is attached to the slide base 6b.

  As shown in FIG. 1, a temperature adjusting liquid passage is formed across the support 3 and the rotating body 2, and the temperature of the rotating molds 2 a and 2 b is caused by the temperature adjusting liquid flowing through the temperature adjusting liquid passage. Can be adjusted. The temperature adjustment liquid path includes rotating body side liquid paths 2e and 2f on the rotating body 2 side, primary liquid paths 3b and 3c, and secondary liquid paths 3d and 3e on the support body 3 side. The rotator-side liquid passages 2e and 2f are formed in the rotary molds 2a and 2b, and have openings 2e1, 2e2, 2f1, and 2f2 that are open on the lower surface of the rotary table 2d at both ends. The primary liquid passages 3b and 3c and the secondary liquid passages 3d and 3e have openings 3b1, 3c1, 3d1, and 3e1 that open on the upper surface of the support table 3a at one end, and the other end is connected to the temperature control device 4. The

  The temperature adjustment device 4 accumulates temperature adjustment liquids such as water and oil in the primary storage unit and the secondary storage unit, and adjusts these temperature adjustment liquids to a predetermined temperature using a heater or the like. The temperature control liquid stored in the primary storage unit is discharged to the primary liquid path 3b by the pump of the temperature control device 4, and returns to the primary storage unit via, for example, the rotating body side liquid path 2e and the primary liquid path 3c. The temperature adjustment liquid stored in the secondary storage unit is discharged to the secondary liquid passage 3e by the pump, and returns to the secondary storage unit via, for example, the rotating body side liquid passage 2f and the secondary liquid passage 3d.

  As shown in FIGS. 1 and 3, arc grooves 3f to 3i are formed on the upper surface of the support table 3a. The arc grooves 3f and 3i are located on a circumference 11 centering on the rotation center 10 of the rotating body 2, have a length of approximately a half circumference, and are adjacent to each other with a space. Similarly, the arc grooves 3g and 3h are located on the circumference 12 centering on the rotation center 10, have a length of approximately a half circumference, and are adjacent to each other with a space. Openings 3b1, 3c1, 3d1, and 3e1 are opened at substantially the center of the arc grooves 3f to 3i.

  As shown in FIG. 4, the openings 2 e 1 and 2 f 1 are located on the circumference 11, and the openings 2 e 2 and 2 f 2 are located on the circumference 12. Therefore, as shown in FIGS. 3 and 4, when the rotating body 2 rotates in the direction of arrow A, the opening 2e1 rotates while opening in the arc groove 3f, and then rotates while opening in the arc groove 3i. Similarly, the opening 2e2 rotates while opening in the arc groove 3g and the arc groove 3h, the opening 2f2 rotates while opening in the arc groove 3i and the arc groove 3f, and the opening 2f2 rotates in the arc groove 3h and the arc groove 3g. Rotate while opening. When rotating (reversely rotating) in the direction of arrow B, the reverse operation appears.

  When a molded product is manufactured by the molding machine 1, first, the slide base 6b and the support 3 are brought close to the secondary mold 5b by an unillustrated hydraulic device (accordion type). As a result, as shown in FIGS. 1 and 2, the mold is closed between the primary mold 5a and the rotary mold 2a in the primary stage 1a, and between the secondary mold 5b and the rotary mold 2b in the secondary stage 1b. The mold is closed. The primary material is injected to the primary mold 5a side by the primary unit 7a, and the secondary material is injected to the secondary mold 5b side by the secondary unit 7b.

  At this time, a primary temperature adjustment liquid having a high temperature, for example, 100 ° C. or more flows from the temperature adjustment device 4 through the rotary mold 2a through the primary liquid path 3b, the arc groove 3f, and the rotating body side liquid path 2e. Thus, the primary material is injected into the rotating mold 2a in a state where the rotating mold 2a is adjusted to a high temperature. The primary temperature adjustment liquid returns to the temperature adjustment device 4 via the arc groove 3g and the primary liquid path 3c. On the other hand, a secondary temperature adjusting liquid having a low temperature, for example, 80 ° C. or less, is supplied to the rotating mold 2b through the secondary liquid path 3e, the arc groove 3i, and the rotating body side liquid path 2f. . Thereby, the rotary mold 2b is adjusted to a low temperature, and the secondary material is injected in this state. Then, the secondary temperature adjustment liquid returns to the temperature adjustment device 4 via the arc groove 3h and the secondary liquid path 3d.

  Next, the primary mold 5a and the rotary molds 2a and 2b are separated from the secondary mold 5b by a hydraulic device. Thereby, mold opening is performed in the primary stage 1a and the secondary stage 1b. Subsequently, the rotating body 2 is rotated (normally rotated) with respect to the support 3 by a rotating device (not shown) in the mold open state (in the direction of arrow A in FIG. 4). As a result, the rotary mold 2a rotates from the primary stage 1a to the secondary stage 1b, and the rotary mold 2b rotates from the secondary stage 1b to the primary stage 1a.

  When the rotator 2 rotates, the rotator-side liquid passage 2e rotates while communicating with the primary liquid passages 3b and 3c via the arc grooves 3f and 3g, and then the secondary liquid passage via the arc grooves 3h and 3i. It rotates while communicating with 3d, 3e. Therefore, the secondary temperature adjusting liquid starts to flow into the rotating body side liquid passage 2e during the rotation, and the rotating mold 2a starts to be cooled. On the other hand, the rotor-side liquid path 2f rotates while communicating with the secondary liquid paths 3d and 3e via the arc grooves 3h and 3i, and then communicates with the primary liquid paths 3b and 3c via the arc grooves 3f and 3g. Rotate while. Therefore, in the middle of rotation, the primary temperature adjustment liquid starts to flow into the rotor-side liquid path 2f, and the rotary mold 2a starts to be warmed. Thereafter, the mold is clamped and injection molding is performed in the primary stage 1a and the secondary stage 1b. And after mold opening, the molded product of the secondary stage 1b is taken out from a metal mold | die with a taking-out machine.

  Next, the rotating body 2 rotates (reverses) in the direction of arrow B in FIG. 4 and injection molding is performed by the molding machine 1. The molding machine 1 is a counter-inversion molding machine in which the rotating dies 2a and 2b are inverted, and is suitable for performing two-color molding. As a molded product, a light transmission plate portion formed from a transparent or translucent primary material and a mounting portion having a lower melting point than the primary material and formed around the light transmission plate and attached to other members are integrated. A resin product having the same can be molded. As the primary material, for example, polycarbonate and acrylic can be used, and as the secondary material, PET, a polycarbonate mixture and the like can be used. Then, automobile parts such as a panoramic roof and a rear window can be molded as a resin product.

  As described above, the temperature adjustment liquid path includes the rotor-side liquid paths 2e and 2f, the primary liquid paths 3b and 3c, and the secondary liquid paths 3d and 3e (see FIG. 1). The openings 3b1, 3c1, 3d1, and 3e1 of the primary liquid passages 3b and 3c and the secondary liquid passages 3d and 3e are formed in the openings 2e1, 2e2, and 2f1, respectively, of the rotor-side liquid passages 2e and 2f as shown in FIGS. 2f2 is located on the circumferences 11 and 12 which rotate. The support 3 extends in a circular arc shape with a predetermined length on the circumferences 11 and 12, and any one of the openings 3b1, 3c1, 3d1 of the primary liquid paths 3b, 3c and the secondary liquid paths 3d, 3e. , 3e1 open arc grooves 3f to 3i are formed, and when the rotating body 2 rotates, the rotating body side liquid paths 2e and 2f pass through the arc grooves 3f to 3i and the primary liquid paths 3b and 3c and the secondary liquid path 3d, respectively. It rotates while communicating with one of 3e.

  Therefore, during the rotation of the rotating body 2, the rotating body side liquid passages 2e and 2f communicate with the primary liquid passages 3b and 3c or the secondary liquid passages 3d and 3e via the arc grooves 3f to 3i. Therefore, the temperature adjusting liquid starts to flow toward the rotating molds 2a and 2b during the rotation of the rotating molds 2a and 2b, and the temperature of the rotating molds 2a and 2b starts to be adjusted by the temperature adjusting liquid during the rotation. As a result, the temperature of the rotating molds 2a and 2b is adjusted faster than the conventional one, thereby improving productivity and product quality. Further, the conventional molding machine has a configuration that is not easy to manufacture because it is necessary to pinpoint the opening of the liquid passage on the rotating body side and the opening of the liquid passage on the support side (see Patent Document 1). On the other hand, since this form has the circular-arc groove | channels 3f-3i extended in circular arc shape, a communicating position is long and it has a structure easy to manufacture compared with a conventional one.

  Further, as shown in FIGS. 1 and 3, the arc grooves 3f to 3i include first arc grooves 3f and 3g in which the openings 3b1 and 3c1 of the primary liquid passages 3b and 3c open, and openings of the secondary liquid passages 3d and 3e. The portions 3d1 and 3e1 have second arc grooves 3h and 3i that are open. The rotor-side liquid passages 2e and 2f rotate while communicating with the primary liquid passages 3b and 3c via the first arc grooves 3f and 3g when the rotor 2 rotates, and then the second arc grooves 3h and 3i. Through the secondary liquid passages 3d and 3e. Therefore, when the rotating body 2 rotates, the temperature adjusting liquid flowing in the rotating body side liquid passages 2e and 2f changes from the temperature adjusting liquid on the primary liquid passages 3b and 3c side to the temperature adjusting liquid passage on the secondary liquid passages 3d and 3e side during the rotation. Changes to. On the other hand, when the rotating body 2 is reversed, the temperature adjustment liquid on the secondary liquid passages 3d, 3e side is changed to the temperature adjustment liquid on the primary liquid passages 3b, 3c side during the reverse rotation. Therefore, when the rotating molds 2a and 2b are rotated between the two stages 1a and 1b, the temperature starts to be adjusted before reaching each stage.

  The rotating body 2 has a rotating table 2d that rotates on the upper surface of the support table 3a of the support 3 as shown in FIGS. The first and second arc grooves 3f to 3i are formed on the upper surface of the support table 3a, and the rotor-side liquid passages 2e and 2f have openings 2e1, 2e2, 2f1, and 2f2 that open on the lower surface of the rotary table 2d. is doing. Therefore, a swivel is constituted by the support table 3a and the rotary table 2d. The swivel can have a relatively large diameter. For example, the swivel can have a larger diameter than that of the central axis in a conventional configuration in which the rotating body rotates around the central axis. Therefore, it is easy to form the arc grooves 3f to 3i on the upper surface of the support table 3a.

(Embodiment 2)
The second embodiment will be described with reference to FIG. The second embodiment is formed in substantially the same manner as the first embodiment, but differs in that arc grooves 3j to 3m shown in FIG. 5 are provided instead of the arc grooves 3f to 3i shown in FIG. is doing. Hereinafter, the second embodiment will be described focusing on the differences.

  As shown in FIG. 5, the arc grooves 3 j and 3 m are located on the circumference 11 and extend along the circumference 11. The arc grooves 3k and 3l are located on the circumference 12 and extend along the circumference 12. The first arc grooves 3j and 3k have, for example, an arc center angle of 10 to 30 ° and a short arc length. The second arc grooves 3l and 3m are adjacent to the first arc grooves 3j and 3k with a space. For example, the arc center angle is 250 ° or more and the arc arc is larger than the first arc grooves 3j and 3k. Long length. One of the openings 3b1, 3c1, 3d1, 3e1 of the primary liquid passages 3b, 3c and the secondary liquid passages 3d, 3e is opened at the center of the arc grooves 3j to 3m.

  The primary temperature adjustment liquid is supplied to the primary liquid paths 3b and 3c, and the secondary temperature adjustment liquid is supplied to the secondary liquid paths 3d and 3e. When the rotator 2 rotates (see FIGS. 1, 4 and 5), the rotator-side liquid passages 2e and 2f rotate while communicating with the first arc grooves 3j and 3k, and then the second arc grooves 3l and 3m. Rotates while communicating with. Therefore, the rotary molds 2a and 2b rotate from the primary stage 1a to the secondary stage 1b, and the temperature is increased by the primary temperature adjusting liquid in the primary stage 1a. Therefore, insufficient filling of the primary material in the primary stage 1a is suppressed, and the mold transfer property is improved. When the rotary molds 2a and 2b rotate from the primary stage 1a to the secondary stage 1b, the rotary molds 2a and 2b start to be cooled by the secondary temperature adjusting liquid at a relatively early stage during the rotation. Therefore, in the secondary stage 1b, the primary material cools and hardens, and the amount of the primary material dripping when the secondary material is injected is reduced. This improves the quality of the product.

(Embodiment 3)
A third embodiment will be described with reference to FIGS. The third embodiment is formed in substantially the same manner as the first embodiment, but the rotating body 2 shown in FIG. 1 rotates around the vertical axis (rotation center 10) whereas the rotating body 22 shown in FIG. Rotates around a horizontal axis (rotation center 13). Hereinafter, Embodiment 3 will be described focusing on the differences.

  The molding machine 21 according to Embodiment 3 includes a rotating body 22 having rotating molds 22a and 22b, a support body 23 that rotatably supports the rotating body 22, a primary mold 25a, and a secondary mold 25b. have. The rotating body 22 has a disk-shaped rotating table 22d, and the rotating table 22d is erected with respect to the ground. Rotating molds 22a and 22b are mounted on one side of the rotating table 22d.

  As shown in FIG. 6, the support 23 has a disk-shaped support table 23 a erected on the ground. The support table 23a faces the rotary table 22d, and supports the rotary table 22d so as to be rotatable on the rotation center 13 that is a horizontal axis. Therefore, a swivel is constituted by the support table 23a and the rotary table 22d. The molding machine main body 26 includes a base portion 26a and a slide base 26b that is movable with respect to the base portion 26a. A primary mold 25a and a secondary mold 25b are attached to the slide base 26b. The slide base 26b is slid with respect to the base part 26a by a hydraulic device (not shown) to perform mold clamping and mold opening in both the primary mold 25a and the secondary mold 25b.

  As shown in FIG. 6, a temperature adjustment liquid path for temperature adjustment liquid is formed across the support body 23 and the rotating body 22. The temperature adjustment liquid path includes rotor-side liquid paths 22e and 22f, primary liquid paths 23b and 23c, secondary liquid paths 23d and 23e, and arc grooves 23f to 23i. As shown in FIG. 7, the arc grooves 23f to 23i are formed on the surface of the support table 23a. The arc grooves 23f and 23i extend in a circular arc shape on the circumference 14 centering on the rotation center 13 of the rotating body 22, have a length of approximately a half circumference, and are adjacent to each other with a space. Similarly, the arc grooves 23g and 23h extend in a circular arc shape on a circumference 15 centered on the rotation center 13, have a substantially half circumference length, and are adjacent to each other with a space. At substantially the center of the arc grooves 23f to 23i, one of the openings 23b1, 23c1, 23d1, 23e1 of the primary liquid paths 23b, 23c and the secondary liquid paths 23d, 23e is opened.

  As shown in FIGS. 6 and 8, the rotor-side liquid passages 22e and 22f have openings 22e1, 22e2, 22f1, and 22f2 that open to the rotary table 22d. The openings 22e1 and 22f1 are located on the circumference 14, and the openings 22e2 and 22f2 are located on the circumference 15. Accordingly, when the rotating body 22 rotates in the direction of the arrow in FIG. 8, the secondary temperature adjusting liquid starts to flow from the primary temperature adjusting liquid to the rotating molds 22a and 22b during the rotation. Alternatively, the primary temperature adjustment liquid starts to flow from the secondary temperature adjustment liquid.

(Embodiment 4)
The fourth embodiment will be described with reference to FIGS. The fourth embodiment is formed in substantially the same manner as the first embodiment, but has a rotating body 32 and a support 33 shown in FIG. 9 instead of the rotating body 2 and the support 3 shown in FIG. . Hereinafter, the fourth embodiment will be described focusing on the differences.

  As shown in FIG. 9, the support 33 has a cylindrical central axis 33a. The rotating body 32 has a cylindrical rotating base 32d that rotates around a central axis 33a, and rotating molds 32a and 32b attached to the rotating base 32d. As shown in FIGS. 9 and 10, a temperature adjusting liquid path is formed across the support 33 and the rotating body 32, and the temperature adjusting liquid path includes the rotating body side liquid paths 32 e and 32 f and the primary liquid paths 33 b and 33 c. Secondary liquid passages 33d and 33e are provided.

  The rotator-side liquid passages 32e and 32f are provided in the rotation base 32d and the rotation molds 32a and 32b, and have openings that open to the inner peripheral surface of the rotation base 32d. The primary liquid passages 33b and 33c and the secondary liquid passages 33d and 33e extend in the axial direction through the central shaft 33a and have an opening at one end that penetrates the outer peripheral surface of the central shaft 33a. Connected to the temperature controller side. Arc grooves 33f to 33i are formed on the outer peripheral surface of the central shaft 33a. The arc grooves 33f and 33i extend in an arc shape along the outer peripheral surface of the rotating body 32 (in a circle centered on the rotation center 16) and are adjacent to each other with a space. Similarly, the arc grooves 33g and 33h extend in an arc shape along the outer peripheral surface of the rotating body 32 and are adjacent to each other with a space.

  In the arc grooves 33f to 33i, openings of primary liquid paths 33b and 33c and secondary liquid paths 33d and 33e are opened. When the rotator 32 rotates, the rotator-side liquid passages 32e and 32f rotate while communicating with any one of the primary liquid passages 33b and 33c and the secondary liquid passages 33d and 33e via the arc grooves 33f to 33i. Therefore, the primary temperature adjustment liquid or the secondary temperature adjustment liquid starts to flow into the rotary molds 32a and 32b during the rotation.

(Other embodiments)
The present invention is not limited to the first to fourth embodiments, and may be the following forms.
(1) For example, Embodiments 1 to 4 are two-color molding machines having a primary mold, a secondary mold, and two rotary molds. However, it may be a multi-color molding machine having three or more colors, and may have a tertiary or higher mold and three or more molds.
(2) In the first to fourth embodiments, two arc grooves are formed adjacent to each other on the same circle. However, it may be a form having only one arc groove on the same circle. Even in this case, the temperature adjustment on one stage side can be started quickly.
(3) The first to fourth embodiments have an arc groove on the support side. However, an arc groove may be formed on the rotating body side. For example, instead of the arc groove shown in FIGS. 3 and 7, an arc groove may be formed on the lower surface of the support table shown in FIGS. Alternatively, instead of the arc groove shown in FIG. 10, an arc groove may be formed on the inner peripheral surface of the rotation base.

It is a front schematic diagram of a rotary type injection molding machine. It is a front schematic diagram of the rotary type injection molding machine at the time of mold clamping. FIG. 3 is a partial cross-sectional view taken along line III-III in FIG. 1. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1. FIG. 4 is a diagram corresponding to FIG. 3 of the second embodiment. 6 is a front schematic view of a rotary injection molding machine according to Embodiment 3. FIG. FIG. 7 is a partial cross-sectional view taken along the line VII-VII in FIG. 6. FIG. 7 is a cross-sectional view taken along line VIII-VIII in FIG. 6. It is sectional drawing of the rotary body of Embodiment 4, and a support body. FIG. 10 is a cross-sectional view taken along the line XX in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 21 ... Molding machine 1a ... Primary stage 1b ... Secondary stage 2, 22, 32 ... Rotating body 2a, 2b, 22a, 22b, 32a, 32b ... Rotating metal mold 2c, 33a ... Center shaft 2d, 22d ... Rotary table 2e, 2f, 22e, 22f, 32e, 32f ... Rotating body side liquid passages 2e1, 2e2, 2f1, 2f2, 3b1, 3c1, 3d1, 3e1, 22e1, 22e2, 22f1, 22f2, 23b1, 23c1, 23d1, 23e1,. 3, 23, 33 ... support bodies 3a, 23a ... support tables 3b, 3c, 23b, 23c, 33b, 33c ... primary liquid passages 3d, 3e, 23d, 23e, 33d, 33e ... secondary liquid passages 3f to 3i, 3j -3m, 23f-23i, 33f-33i ... arc groove 4 ... temperature control device 5a, 25a ... primary mold 5b, 25b ... secondary mold 6, 26 ... molding machine book

Claims (4)

A rotating body including a mold; a support body that rotatably supports the rotating body; and a temperature adjustment liquid path formed across the rotation body and the support body. A rotary injection molding machine that adjusts the temperature of the mold by flowing a preparation,
The temperature adjusting liquid passage is provided on the rotating body and has a rotating body side liquid passage having an opening that opens to the supporting body side, and a primary liquid passage having an opening provided on the supporting body and opening to the rotating body side. And a secondary liquid path,
The openings of the primary liquid path and the secondary liquid path are located on a circumference around which the opening of the rotating body side liquid path rotates,
One of the support and the rotating body extends in an arc shape with a predetermined length on the circumference, and is one of the primary liquid path, the secondary liquid path, and the rotating body side liquid path. An arc groove having an opening is formed, and the rotating body side liquid path rotates while communicating with at least one of the primary liquid path and the secondary liquid path via the arc groove when the rotating body rotates. Rotary injection molding machine characterized by The rotary injection molding machine according to claim 1,
The arc groove is formed in the support and the first arc groove having an opening of the primary liquid path, and the opening of the secondary liquid path formed in the support and the first arc groove. A second arc groove extending in an arc shape on the same circumference,
The rotating body side liquid path rotates while communicating with the primary liquid path via the first arc groove when the rotating body rotates, and then communicates with the secondary liquid path via the second arc groove. A rotary injection molding machine that rotates while rotating. The rotary injection molding machine according to claim 2,
The support has a support table that rotatably supports the lower surface of the rotary table of the rotary body,
The first and second arc grooves are formed on the upper surface of the support table,
The rotary-type injection molding machine according to claim 1, wherein the liquid passage on the rotating body has an opening that opens on a lower surface of the rotary table. The rotary injection molding machine according to claim 2 or 3,
The primary temperature adjustment liquid is supplied to the primary liquid path side, the secondary temperature adjustment liquid having a lower temperature than the primary temperature adjustment liquid is supplied to the secondary liquid path side, and the arc length of the second arc groove is set to the arc of the first arc groove. A rotary injection molding machine characterized in that the rotary body-side liquid passage is communicated with the first arcuate groove and then communicated with the second arcuate groove when the rotating body rotates and is set longer than the length. .

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