JP4425750B2 - Molded product gripping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding clamping means for a molding machine which can shorten a molding cycle time without necessitating recognition of operation in case that the clamping means for the molding for the molding machine clamps and carries the molding, and which enables reduction of the machine cost. <P>SOLUTION: The molding clamping means is attached to a movable supporting frame and is placed between a pair of molds, both being face to face opened and closed. The supporting frame is connectively moved so that it contacts and recedes from at least one of the molds. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

  The present invention relates to a molded product gripping device of a molding machine.

  Conventionally, in an injection blow molding machine in which a step of molding a test tube preform by injection molding and a step of blow molding the preform, that is, a step of blow molding, can be performed by a single molding machine. The support for supporting the male mold for injection molding, the support member for the preform, etc. is rotated between the mold supporting apparatus for supporting the female mold for molding and the mold supporting apparatus for supporting the female mold for blow molding. It is arranged to be possible. One of the two mold support devices is a fixed platen fixed to the frame, and the other is a movable platen movable with respect to the fixed platen. Then, when injection molding is performed in a state where the mold is closed at the injection station and a test tubular preform is formed, the support is intermittently rotated 90 degrees after the mold is opened and heated at the heating station. Later, the preform is moved to a blow station, the preform is loaded into a blow mold female mold, the mold is closed, and blow molding is performed. In addition, the molded product shape | molded by blow molding is discharged | emitted outside the injection blow molding machine in a discharge station (for example, refer patent document 1).

Therefore, injection molding and blow molding can be performed simultaneously at the injection station and the blow station in a single molding machine, and the throughput of the molded product is improved. Moreover, since injection molding and blow molding are performed by a single molding machine, the entire molding machine becomes compact and installation space can be saved.
Japanese Patent Publication No.61-3655

  However, in the conventional injection blow molding machine, the hydraulic cylinder device is disposed so that the preform support member is separated from the intermediate mold when the preform is moved. Therefore, each time the preform is moved, it is necessary to check the operation of the hydraulic cylinder device and then move the preform by rotating the support, which takes time and takes a long time for the molding cycle. turn into. Moreover, since it is necessary to arrange | position the hydraulic cylinder apparatus corresponding to each support member, cost will become high.

  The present invention solves the above-mentioned conventional problems by allowing a gripping frame to which a molding product gripping device of a molding machine is attached to be interlocked with the operations of mold closing and mold opening. Molding device gripping device of molding machine that does not require operation confirmation when gripping device grips and transports molded product, can reduce time required for molding cycle, and can reduce device cost The purpose is to provide.

Therefore, in the molded product gripping device of the molding machine of the present invention, the molded product gripping device of the molding machine that is disposed between a pair of molding dies that are closed and opened opposite to each other and grips the molded product. The molded product gripping device is attached to a gripping frame movable along a guide bar attached to one of the pair of molding dies or the supporting device of the molding die , and the gripping frame is engaged with the gripping frame. The gripping frame engaging portion is operated by an engaging / disengaging member attached to the other of the pair of molds or the supporting device of the mold, and engages and engages with the tip end portion of the guide bar. The engagement frame is released and engaged with the distal end of the engagement / disengagement member, and the gripping frame is brought into contact with and separated from at least one of the pair of molds in conjunction with mold closing and mold opening. as such, to move the mold closing and mold opening direction, when the mold opening is completed Is appears to be locked to the distal end of the guide bar.

  In the molded product gripping apparatus of still another molding machine of the present invention, the gripping frame engaging portion further engages and disengages the distal end portion of the guide bar and the distal end portion of the engaging / disengaging member. This is done by appropriate means.

  In still another molding machine gripping device of the present invention, the pair of molding dies are a stationary die attached to an injection die supporting device, and a movable die attached to a blow die supporting device. A non-rotatable intermediate mold that is attached to an intermediate mold support apparatus disposed between the injection mold support apparatus and the blow mold support apparatus and includes an injection core mold and a blow guide. And the gripping frame is rotatably attached to the intermediate support device.

  In the molded product gripping device of still another molding machine of the present invention, the gripping frame is further rotated 180 degrees, and the intermediate molded product molded by injection molding is gripped by the molded product gripping device, It is moved between the movable mold and the blowing guide from between the fixed mold and the injection core mold.

According to the present invention, the molded product gripping device of the molding machine is a molded product gripping device of a molding machine that is disposed between a pair of molding dies that perform mold closing and mold opening facing each other, and grips the molded product. The molded product gripping device is attached to a gripping frame movable along a guide bar attached to one of the pair of molding dies or the supporting device of the molding die , and the gripping frame is engaged with the gripping frame. The gripping frame engaging portion is operated by an engagement / disengagement member attached to the other of the pair of molding dies or the supporting device of the molding dies, and engages and engages with the distal end portion of the guide bar. In addition to releasing and engaging / disengaging the distal end of the engaging / disengaging member, the gripping frame contacts and separates at least one of the pair of molds in conjunction with mold closing and mold opening. to, navigate to mold closing and mold opening direction, the guide when the mold opening is completed It appears to be locked to the distal end portion of the bar. Therefore, there is no need to check the operation when gripping and transporting the molded product, the time required for the molding cycle can be shortened, and the device cost can be reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 is a plan view of an injection blow molding machine according to an embodiment of the present invention, FIG. 2 is a front view of the injection blow molding machine according to the embodiment of the present invention, and FIG. 3 is an injection blow molding machine according to the embodiment of the present invention. 2 is a cross-sectional view taken along the arrow A in FIG. 2, and FIG. 4 is a vertical cross-sectional view of the injection blow molding machine according to the embodiment of the present invention, and is a cross-sectional view taken along the arrow B in FIG.

  In the figure, reference numeral 10 denotes an injection blow molding machine, a fixed platen 11 as an injection mold support device fixed to a support frame 18, and a blow mold support slidably attached to a guide member 18 a on the support frame 18. A movable platen 12 as an apparatus, and an intermediate mold support frame 21 as an intermediate mold support device slidably attached to a guide member 18a on the support frame 18 between the fixed platen 11 and the movable platen 12. Have. The injection blow molding machine 10 forms a preform 61, which will be described later, as a test tubular intermediate molded product by injection molding, and a final molded product, which will be described later by blow molding, that is, blow molding. The apparatus which performs the process shape | molded in 62. In the injection blow molding machine 10, injection molding is performed at the injection station between the fixed platen 11 and the intermediate mold support frame 21, and the blow is performed at the blow station between the movable platen 12 and the intermediate mold support frame 21. Molding is performed. It is also possible to use a blowing station between the fixed platen 11 and the intermediate mold support frame 21 and an injection station between the movable platen 12 and the intermediate mold support frame 21. The final molded product 62 may have any shape. Here, the final molded product 62 is a bottle-shaped or bottle-shaped bottomed container having a small-diameter open mouth, and a male screw is provided on the outer periphery of the mouth. It is assumed that is formed.

  A fixed mold 13 as an injection mold is attached to the mold mounting surface (the left side in the figure) of the fixed platen 11. An injection core mold 42 is disposed on the surface of the core mold frame 41 as an intermediate mold that is non-rotatably attached to the intermediate mold support frame 21 on the fixed platen 11 side. The injection core mold 42 includes a root portion 42a and a male mold portion 42b. When the fixed mold 13 and the injection core mold 42 are in close contact with each other and the mold is closed, the injection core mold 42 is interposed between the fixed mold 13 and the fixed mold 13. A cavity having the shape of the preform 61 is formed. 1 to 4 show a state where the fixed mold 13 and the injection core mold 42 are opened and the mold is opened.

  Further, on the back surface (right side surface in FIGS. 1, 3 and 4) side of the fixed platen 11, only a part of the heating cylinder 16 is shown, and an injection device not shown in the other part is disposed. Here, the injection device includes the heating cylinder 16, and a raw material hopper for charging raw resin such as resin pellets into the heating cylinder 16 is attached to the heating cylinder 16. Further, a screw is disposed in the heating cylinder 16 so as to be able to rotate and to advance and retreat. An injection driving device for rotating the screw in the heating cylinder 16 and moving it forward or backward is disposed behind the heating cylinder 16.

  In the metering step, the screw is rotated by driving the injection driving device to accumulate resin in front of the screw, so that the screw moves back to a predetermined position (right direction in FIGS. 1 to 4). To move). At this time, the raw material resin supplied from the raw material hopper is heated and melted in the heating cylinder 16, and the screw is moved backward by the pressure of the resin stored in front of the screw (left side in FIGS. 1 to 4). . Subsequently, in the injection process, the nozzle 16a at the tip of the heating cylinder 16 is pressed against the fixed mold 13, and the injection driving device is driven to advance the screw (move to the left in FIGS. 1 to 4). As a result, the resin stored in front of the screw is injected from the tip of the nozzle 16 a and filled in a cavity formed between the fixed mold 13 and the injection core mold 42.

  Further, a blow mold for blow molding, that is, a movable split mold 14 as a movable mold is attached to the mold mounting surface (the right side surface in FIGS. 1 to 4) of the movable platen 12. The movable split mold 14 includes a drive-side movable part 14a, a driven-side movable part 14b, and a fixed bottom part 14c, and the drive-side movable part 14a and the driven-side movable part are separated by a split-type drive cylinder device 17 as a split-type drive apparatus. 14b is moved in the lateral direction (vertical direction in FIGS. 1 and 3). In this case, the drive-side movable portion 14a is connected to the piston rod 17a of the split-type drive cylinder device 17, and is directly moved by the split-type drive cylinder device 17, and the driven-side movable portion 14b is another set of drives. It is connected to the side movable part 14a and is moved in a direction facing the drive side movable part 14a of its own set. A blowing guide 43 is disposed on the surface of the core mold 41 attached to the intermediate mold support frame 21 on the movable platen 12 side. The blowing guide 43 includes a root portion 43a, and closes and closes the inlet of a blow molding female die 58, which will be described later, which is formed in close contact with the driving side movable portion 14a and the driven side movable portion 14b. In the state, a blow molding space having the shape of the final molded product 62 is formed. 1 to 4 show a state where the drive side movable portion 14a and the driven side movable portion 14b of the movable split mold 14 are opened, and the movable split mold 14 and the blowing guide 43 are opened and the mold is opened. Is shown.

  A mold clamping device (not shown) is disposed on the back surface (left surface in the drawing) of the movable platen 12. The mold clamping device includes a mold clamping cylinder device for driving the movable platen 12 and a support plate to which the mold clamping cylinder device is attached. The fixed platen 11 and the support plate are connected by a plurality of, for example, four tie bars 15, and the movable platen 12 and the intermediate mold support frame 21 move forward or backward along the tie bar 15 (in the right direction in FIG. (Moving leftward). The fixed platen 11 is fixed to the support frame 18 by a fixing member such as a bolt. The movable platen 12 and the intermediate mold support frame 21 are supported and slid mainly by the guide member 18a from below.

  In the present embodiment, the mold clamping device and the drive source of the mold clamping device may be of any type, and instead of the mold clamping cylinder device, a toggle mechanism type using a toggle link is used. Alternatively, a composite system in which a link mechanism and a cylinder device are combined may be used. Also, the drive source may be a hydraulic cylinder device, or a combination of an electric motor and a ball screw.

  Further, an intermediate drive cylinder device 22 as an intermediate drive device is attached to the fixed platen 11, and an intermediate support frame 21 is attached to a connecting rod 23 connected to the piston rod of the intermediate drive cylinder device 22. ing. Then, by operating the intermediate drive cylinder device 22, the intermediate support frame 21 can be moved forward or backward with respect to the fixed platen 11. Thereby, the intermediate mold support frame 21 can be moved with respect to the stationary platen 11, and the injection molding and blow molding are performed by performing mold closing, mold clamping, and mold opening at separate timings at the injection station and the blowing station. It can be carried out.

  In the present embodiment, the intermediate support frame 21 has a substantially gate shape, and a lower end portion is slidably attached to the guide member 18a, and the left and right leg portions extending in the vertical direction, and the leg portions. And a top plate portion extending in the lateral direction for connecting the upper end portions. The core mold 41 is disposed between the left and right legs. Here, the core mold 41 is fixed to a cylindrical support column 47 attached through the left and right legs. That is, the core mold 41 is non-rotatably attached to the intermediate mold support frame 21.

  A rotating frame 31 as a gripping frame is rotatably attached to the left and right outer sides of the intermediate support frame 21 in the support column 47. In the state shown in FIGS. 1 to 4, columnar guide bars 33 extending frontward and rearward are attached to the front and rear sides (right and left sides in FIGS. 1 to 4) of the rotating frame 31. Yes. The number of the guide bars 33 can be arbitrarily set. In the example shown in FIGS. 1 to 4, two guide bars 33 are attached to the left and right rotating frames 31 in the front-rear direction. The guide bar 33 has a gripping frame 32 that supports a molded product gripping device 52 to be described later for gripping the outer periphery of the mouth of the preform 61 as an intermediate molded product in the axial direction of the guide bar 33. The guide bar 33 is slidably attached to the distal end portion 33a of the guide bar 33 so that it can be locked and released. 1-4, the grip frame 32 is locked to the tip end portion 33a of the guide bar 33 by the grip frame engaging portion 32a and does not slide in the axial direction of the guide bar 33. Yes. Note that when the engagement between the gripping frame engaging portion 32 a and the tip end portion 33 a is released, the gripping frame 32 is released and can slide in the axial direction of the guide bar 33.

  The gripping frame engaging portion 32a is releasably engaged with the distal end portion of the ejection side engagement / disengagement member 54 as an engagement / disengagement member attached to the fixed platen 11 and is also released by the distal end portion of the ejection side engagement / disengagement member 54. When actuated, the tip 33a of the guide bar 33 is engaged or disengaged. Further, the gripping frame engaging portion 32 a releasably engages with the tip of a blowing side engaging / disengaging member 55 as an engaging / disengaging member attached to the movable platen 12, and the tip of the blowing side engaging / disengaging member 55. It is actuated by the portion to engage or disengage with the distal end portion 33a of the guide bar 33.

  An electric motor 34 is attached to one leg portion of the intermediate support frame 21 as a drive source for rotating the rotary frame 31. Then, by operating the electric motor 34, the rotary frame 31 rotates around the support column 47.

  On the outer surface on the upper side and on the lower outer surface of the core mold 41, for grip release as a drive source for driving the grip release member 48 for operating the molded product gripping device 52 to release the grip state. Each of the driving devices 45 is attached. The grip release driving device 45 may be a hydraulic cylinder device or a combination of an electric motor and a ball screw. Here, it is a pneumatic cylinder device, and the pneumatic cylinder A description will be given assuming that the grip release member 48 is attached to the piston rod of the apparatus. When the grip release driving device 45 is operated, the grip release member 48 is moved forward and backward. The grip release member 48 includes a protruding member 48a.

  By the way, the extending rod 44 is attached to the blowing guide 43 so as to protrude from the root portion 43a. And on the outer surface on the upper side and the lower outer surface of the core mold 41, there are respectively a stretching rod driving device 46 as a driving source for operating the stretching rod 44 to protrude from the root portion 43a. Is attached. The drawing rod drive device 46 may be a hydraulic cylinder device or a combination of an electric motor and a ball screw, but here, it will be described as a pneumatic cylinder device. When the drawing rod driving device 46 is operated, the connecting plate 46a connected to the piston rod of the drawing rod driving device 46 moves, and the drawing rod 44 having the root portion attached to the connecting plate 46a is moved. It protrudes and the said preform 61 is extended. That is, in the present embodiment, the stretch rod 44 is protruded into the preform 61, and the preform 61 is finally blown by stretch blow molding in which high pressure air is blown while the preform 61 is stretched. The molded product 62 is molded. In this case, a blowing guide 43, an extending rod 44, or an air flow path (not shown) for supplying high pressure air for blow molding, an air ejection hole (cutting), and the like are formed between them.

  If necessary, the preform 61 can be formed into the final molded product 62 by blow molding in which high-pressure air is blown without projecting the stretching rod 44. In this case, the stretching rod 44, the stretching rod driving device 46, etc. can be omitted. It should be noted that power is supplied to piping for supplying high-pressure air as working fluid to the grip-release driving device 45 and the stretching rod driving device 46, piping for supplying high-pressure air for blow molding, and various devices. A signal line or the like for transmitting a signal from an electric wire, a sensor, or the like can be disposed so as to pass through the hollow support column 47.

  The injection blow molding machine 10 has a control device (not shown). The control device is a kind of computer including a calculation means such as a CPU and an MPU, a storage means such as a magnetic disk and a semiconductor memory, an input / output interface, etc., and the injection device, mold clamping device, intermediate type drive cylinder device 22, It controls all operations of the injection blow molding machine 10 including operations of the electric motor 34, the grip release driving device 45, the stretching rod driving device 46, and the like. The control device includes a keyboard, a joystick, a touch panel, etc., and an operator operates to input various data, operation commands and the like, a CRT, a liquid crystal display, an LED (Light Emitting Diode) display, and the like. It may have a part or the like. In addition, the control device may be configured integrally with another control device such as a control device of a molded product take-out device, or among a plurality of control systems constructed in a large computer. There may be one.

  Next, the configuration of each part of the injection blow molding machine 10 will be described in detail.

  5 is a cross-sectional plan view of the injection blow molding machine according to the embodiment of the present invention, and is a cross-sectional view taken along arrow C in FIG. 2, and FIG. 6 is a longitudinal sectional view of the injection blow molding machine according to the embodiment of the present invention. 1 is a cross-sectional view taken along arrow D, FIG. 7 is a front partial cross-sectional view of the injection blow molding machine according to the embodiment of the present invention, and shows a closed state, and FIG. 8 is an injection blow molding according to the embodiment of the present invention. FIG. 9 is an enlarged view of a main part of the machine, an enlarged view of an E part in FIG. 7, and FIG. 9 is an enlarged view of a main part of an injection blow molding machine in the embodiment of the present invention.

  As shown in FIGS. 5 and 6, a female mold portion 51 as an injection mold is attached to a mold mating surface of the fixed mold 13, that is, a parting surface, by a cavity plate 13e. There may be a single female mold part 51 or a plurality of female mold parts 51, but in this embodiment, two rows of six rows in the vertical direction are formed, and twelve female mold parts 51 are formed. Is attached to the fixed mold 13. In this case, six blow molding female molds 58 formed by the movable split mold 14 attached to the mold mounting surface of the movable platen 12 at the blowing station are also arranged in the vertical direction, like the female mold part 51. Two rows are formed.

  In the fixed mold 13, a nozzle touch portion 13a to which the tip of the nozzle 16a of the heating cylinder 16 is pressed, a sprue 13b as a resin flow path extending from the nozzle touch portion 13a, and a branch from the sprue 13b are branched. A runner 13 c serving as a resin flow path and a hot runner nozzle 13 d formed at the tip of the runner 13 c and communicating with the inside of each female mold 51 are formed. As a result, the resin injected from the tip of the nozzle 16a of the heating cylinder 16 passes through the sprue 13b, the runner 13c, and the hot runner nozzle 13d, and between each female mold portion 51 and the corresponding male mold portion 42b. The formed cavity is filled. The injection core molds 42 are formed in two rows at positions corresponding to the respective rows of the female mold portions 51, and the root portion 42a and the male mold portion 42b are formed at positions corresponding to the respective female mold portions 51 of the respective injection core dies 42. Is arranged. That is, there are twelve root portions 42a and twelve male portions 42b.

  A molded product gripping device 52 is attached to the gripping frame 32. The molded product gripping device 52 has a screw split mold 52a and a slide plate 52b to which the screw split mold 52a is attached. In the screw split mold 52a, two rows of six rows in the vertical direction are formed at positions corresponding to the female mold portions 51, and twelve screw split molds 52a are attached to the grip frame 32. ing. Then, the screw split mold 52a is formed with a spiral groove for forming a male screw on the inner peripheral surface, and is fitted into the vicinity of the inlet of the female mold portion 51. A cavity corresponding to the mouth of the preform 61 is formed between the portion 42b. Thereby, a male screw is formed on the outer periphery of the mouth of the preform 61.

  The screw split mold 52a has a configuration that can be divided in the horizontal direction (vertical direction in FIG. 5), and the split part of each screw split mold 52a is attached to the split part of the slide plate 52b. It has been. The slide plate 52b extends in the vertical direction (perpendicular to FIG. 5) and is attached to the gripping frame 32. Each of the slide plates 52b has a configuration that can be divided in the horizontal direction. The split portion is attached to the grip frame 32 so as to be slidable in the lateral direction. And the half part of each slide plate 52b is urged | biased by the urging | biasing member 52d mentioned later, such as a spring member, in the center direction, and it couple | bonds together. Thereby, the half part of each screw split mold 52a is also urged in the center direction so as to be coupled to each other.

  A grip release driven member 52c is attached to the vicinity of the upper and lower ends of each slide plate 52b. The grip release driven member 52c has a configuration that can be divided in the lateral direction, and a half portion of each grip release follower member 52c is attached to a half portion of the slide plate 52b. When the halved portions of the slide plate 52b are urged in the center direction and coupled to each other, the halved portions of the grip release follower member 52c are also coupled to each other, and a wedge (as shown in FIG. A wedge-shaped notch is formed. The notch is located at a position corresponding to the protrusion member 48a of the grip release member 48. When the grip release member 48 moves forward, the protrusion member 48a enters the notch and the grip release follower member 52c is pushed laterally. It is like that. As a result, the halved portion of each slide plate 52b and the halved portion of each screw split mold 52a are also spread and divided in the lateral direction, so that after the blow molding is completed at the blowing station, the final molded product The 62 mouths can be released.

  The left and right rotating frames 31 that support the guide bar 33 to which the gripping frame 32 is attached are connected to the support column 47 via a bearing member 47a composed of a ball bearing, a roller bearing, and the like as shown in FIG. It is rotatably attached to the outer periphery. An annular driven gear 31a is attached to the side surface of one rotating frame 31, and a drive gear 34b attached to the rotating shaft 34a of the electric motor 34 meshes with the driven gear 31a. Thereby, the rotating frame 31 can be rotated around the support column 47 by operating the electric motor 34.

  The core mold 41 has a substantially rectangular parallelepiped shape with a part of the wall surface opened, and a connecting plate 46a is disposed inside the core mold frame 41 so as to be able to advance and retract toward the movable split mold 14 side. The connection plate 46a has a portion in the vicinity of the upper and lower ends projecting from the upper outer surface and the lower outer surface of the core mold 41, and is connected to and attached to each of the extending rod driving devices 46. Moreover, the base part of each extending | stretching rod 44 is attached to the connection board 46a, and each extending | stretching rod 44 can be protruded simultaneously. The stretching rods 44 are disposed at positions corresponding to the respective blow molding female molds 58 formed by the movable split mold 14 and form two rows of six rows in the vertical direction.

  In the present embodiment, the drive-side movable portion 14a and the driven-side movable portion 14b of the movable split mold 14 are attached to the mold attachment surface of the movable platen 12 so as to be slidable in the lateral direction (vertical direction in FIG. 5). . In this case, the left and right sets of drive-side movable parts 14 a are connected to the piston rod 17 a of the split-type drive cylinder device 17, and are moved directly in the lateral direction by the split-type drive cylinder device 17. The left and right sets of driven side movable parts 14b are connected to the other set of drive side movable parts 14a by a connecting member 14d, and are moved in a direction opposite to the own set of drive side movable parts 14a. Then, by operating the left and right split mold drive cylinder devices 17 in synchronism, the drive-side movable part 14a and the driven-side movable part 14b in each set are moved and coupled in opposite directions, and the blow mold female mold 58 can be formed. A movable bottom member 14e is movably attached to the intermediate mold support frame 21 in the fixed bottom portion 14c. The movable bottom member 14e slightly protrudes from the fixed bottom portion 14c when blow molding is completed and the coupling between the driving side movable portion 14a and the driven side movable portion 14b is released and the mold is cut (see FIG. 5 and FIG. 5). 6) and the final molded product 62 is ejected and released.

  When the injection blow molding machine 10 is closed at the injection station and the blow station, as shown in FIG. 7, the intermediate mold support frame 21 comes into contact with the fixed platen 11, and the movable platen 12 is attached to the intermediate mold support frame 21. It will be in contact. In this case, the engagement between the gripping frame engaging portion 32a and the tip end portion 33a of the guide bar 33 is released, and the gripping frame 32 in the injection station and the blowing station slides in the axial direction of the guide bar 33, and the core It is in contact with the mold 41.

  At the injection station, as shown in FIG. 9, each male mold part 42 b enters each female mold part 51 attached to the fixed mold 13. Further, the screw split mold 52a in which the half parts are coupled to each other is sandwiched between the female mold part 51 and the injection core mold 42 in a state of being fitted in the vicinity of the inlet of the female mold part 51. ing. Thereby, a cavity is formed between the inner surface of the female mold part 51 and the split mold 52a for screw and the outer surface of the male mold part 42b. In the example shown in FIG. 9, the resin is already filled in the cavity, and the preform 61 is formed. The preform 61 is a substantially test tube elongated bottomed container, and a male screw is formed on the outer periphery of the opening mouth by the inner surface of the screw split mold 52a, and the screw split mold 52a is formed at the boundary of the mouth. A collar portion is formed by a gap between the female mold portion 51 and the female mold portion 51.

  In the blowing station, as shown in FIG. 8, the drive side movable portion 14 a and the driven side movable portion 14 b are coupled to form a blow molding female die 58. In this case, since the driving side movable portion 14a and the driven side movable portion 14b are coupled so as to wrap around the fixed bottom portion 14c from the left and right, the inner surface of the blow molding female mold 58 is connected to the driving side movable portion 14a and the driven side movable portion. It is comprised by the part 14b, the fixed bottom part 14c, and the movable bottom member 14e, and has the shape of a bottle-shaped or bottle-shaped bottomed container. In addition, the movable bottom member 14e does not protrude and is in a state of being retracted to the back side (left side in FIG. 8).

  The screw split mold 52a in a state of holding the preform 61 is pressed against the opening of the blow molding female mold 58 formed by the driving side movable section 14a and the driven side movable section 14b. Therefore, the flange part of the preform 61 is pressed against the outer surface of the opening part of the blow-molding female mold 58, and the part ahead of the collar part enters the blow-molding female mold 58. When the stretching rod driving device 46 is operated in this state, the stretching rod 44 protrudes toward the inner side of the blow molding female mold 58 and enters the inside of the preform 61 to blow the preform 61. It extends toward the back side of the female die 58 for molding. At the same time, high pressure air is blown into the preform 61 through an air flow path (not shown), whereby the preform 61 is expanded and pressed against the inner surface of the blow molding female mold 58. Thereby, the bottle-shaped or bottle-shaped bottomed container which has the shape of the female mold 58 for blow molding can be shape | molded.

  Next, a configuration for locking the gripping frame 32 to the distal end portion 33a of the guide bar 33 and releasing the lock will be described in detail.

  FIG. 10 is a plan view showing the relationship between the gripping frame, guide bar, and injection side engaging / disengaging member of the injection blow molding machine according to the embodiment of the present invention, and FIG. 11 is the gripping frame of the injection blow molding machine according to the embodiment of the present invention. FIG. 12 is a side view showing the relationship between the guide bar and the injection side engaging / disengaging member, and FIG. 12 is a cross-sectional view showing the relationship between the gripping frame, guide bar and injection side engaging / disengaging member of the injection blow molding machine in the embodiment of the present invention. FIG. 11 is an I arrow view, and FIG. 13 is a side sectional view showing the relationship between the gripping frame, guide bar, and injection side engaging / disengaging member of the injection blow molding machine according to the embodiment of the present invention. FIG.

  In the present embodiment, the gripping frame engaging portion 32a of the gripping frame 32 is engaged with the distal end portion 33a of the guide bar 33, and the configuration and operation for releasing the engagement are performed at the injection station and the blowing station. Since it is the same, only the said structure and operation | movement in an injection station are demonstrated here, and the description about the said structure and operation | movement in a blowing station is abbreviate | omitted. In this case, the gripping frame engaging portion 32a is releasably engaged with the distal end portion of the ejection side engagement / disengagement member 54 attached to the fixed platen 11, and is operated by the distal end portion of the ejection side engagement / disengagement member 54. Thus, engagement or disengagement with the distal end portion 33a of the guide bar 33 is performed. 10 to 13 show a state in which the grip frame engaging portion 32a is engaged with the distal end portion of the injection side engaging / disengaging member 54 when the mold is closed at the injection station. Also, as shown in FIGS. 11 to 13, the grip frame engaging portion 32 a above the guide bar 33 and the grip frame engaging portion 32 a below the guide bar 33 have different configurations. The grip frame engaging portion 32a will be described as a grip frame engaging portion 32a-1, and the grip frame engaging portion 32a below the guide bar 33 will be described as a grip frame engaging portion 32a-2.

  Here, the injection side engagement / disengagement member 54 has an engagement protrusion 65 that protrudes in the direction of the guide bar 33 on the upper side surface of the distal end portion on the guide bar 33 side. The engagement protrusion 65 includes an engagement recess 65a on the upper surface near the tip, and an engagement claw (claw) 65b adjacent to the tip of the engagement recess 65a. Further, the injection side engaging / disengaging member 54 has a cam follower 66 that is a roller rotatably attached to a rotation shaft 66a protruding in the direction of the guide bar 33 at a lower portion of the side surface on the guide bar 33 side at the tip.

  And the holding frame engaging part 32a-1 is with respect to the axis of the guide bar 33 in the holder 69 attached to the surface on the opposite side to the rotation frame 31 in the holding frame 32, and the cavity 69a of this holder 69. It has an engagement block 67 that is movably mounted in the vertical direction. The engagement block 67 includes an engagement claw portion 67a that engages with the engagement claw portion 65b on the guide bar 33 side, an engagement recess 67b adjacent to the rear of the engagement claw portion 67a, and the guide bar 33. An engagement release cam portion 67c protruding in the direction is provided. Note that the engagement claw portion 67a and the engagement recess portion 67b of the engagement block 67 engage with the engagement recess portion 65a and the engagement claw portion 65b of the engagement projection portion 65, respectively. The engagement block 67 includes a slide shaft 68a that is guided by the hollow portion 69a and inserted into an insertion hole 69b formed in the holder 69, and is directed toward the guide bar 33 by a biasing member 68b such as a coil spring. Is energized. Accordingly, in the state shown in FIGS. 10 to 13, the engagement claw portion 67 a and the engagement recess portion 67 b of the engagement block 67 and the engagement recess portion 65 a and the engagement claw portion 65 b of the engagement projection portion 65 are detached. The engaged state can be maintained without any problems.

  The gripping frame engaging portion 32 a-2 is attached to the holder 71 attached to the surface of the gripping frame 32 on the side opposite to the rotating frame 31, and to the axis of the guide bar 33 in the hollow portion 71 a of the holder 71. It has a cam block 72 mounted so as to be movable in a direction slightly inclined from the vertical direction. The cam block 72 includes an inclined cam surface 72a and an engaging projection 72b on the guide bar 33 side. The cam block 72 includes a slide shaft 73a that is guided by the hollow portion 71a and inserted into an insertion hole 71b formed in the holder 71. The cam block 72 is directed toward the guide bar 33 by an urging member 73b such as a coil spring. It is energized. 10-13, the cam follower 66 abuts against the inclined cam surface 72a and separates the cam block 72 from the guide bar 33 against the urging force of the urging member 73b.

  On the other hand, the distal end portion 33 a of the guide bar 33 has a guide bar engaging block 75 fixed to the distal end of the guide bar 33 by a nut 76. The guide bar engagement block 75 includes an engagement release cam 75b protruding in the direction of the injection side engagement / disengagement member 54. The disengagement cam 75b comes into contact with the disengagement cam portion 67c of the engagement block 67 in the gripping frame engagement portion 32a-1 so as to move the engagement block 67 away from the guide bar 33. It has become. The guide bar engagement block 75 includes a lock plate 75a protruding in the direction of the gripping frame engagement portion 32a-2. The lock plate 75a may protrude in both directions of the gripping frame engaging portion 32a-1 and the gripping frame engaging portion 32a-2. The lock plate 75a engages with the engaging convex portion 72b of the cam block 72 in the gripping frame engaging portion 32a-2, and is sandwiched between the engaging convex portion 72b and the gripping frame 32. And the tip 33a are in a locked state.

  Next, an operation in which the grip frame engaging portion 32a is engaged with the distal end portion 33a will be described.

  FIG. 14 is a side view showing the relationship between the gripping frame, guide bar and injection side engaging / disengaging member of the injection blow molding machine according to the embodiment of the present invention. FIG. FIG. 16 is a side view showing the relationship between the gripping frame, guide bar, and injection side engaging / disengaging member of the injection blow molding machine in the embodiment, and FIG. 16 shows the operation of the injection blow molding machine in the embodiment of the present invention. It is a 3rd figure which is a side view which shows the relationship between a frame, a guide bar, and the injection | emission side engaging / disengaging member, and shows operation | movement.

  First, when the mold is closed at the injection station, as shown in FIGS. 10 to 13, the engagement claw 67 a and the engagement recess 67 b of the engagement block 67 and the engagement recess of the engagement projection 65 65a and the engaging claw portion 65b are engaged, and the grip frame engaging portion 32a is engaged with the distal end portion of the ejection side engaging / disengaging member 54. When the mold is opened at the injection station, the intermediate mold support frame 21 moves away from the fixed platen 11, so that the interval between the rotary frame 31 attached to the intermediate mold support frame 21 and the fixed platen 11 is increased. Then, the distal end portion of the ejection side engaging / disengaging member 54 moves away from the rotary frame 31 in the direction of the distal end portion 33 a of the guide bar 33. In this case, since the gripping frame engaging portion 32a is engaged with the tip end portion of the ejection side engaging / disengaging member 54, the gripping frame 32 is separated from the rotary frame 31 as shown in FIG. It moves in the direction of the part 33a.

  As shown in FIG. 15, the disengagement cam portion 67 c of the engagement block 67 in the grip frame engagement portion 32 a-1 is disengaged from the guide bar engagement block 75 in the distal end portion 33 a of the guide bar 33. When coming into contact with the cam 75b, the engagement block 67 is moved in a direction away from the guide bar 33 (upward in FIG. 15) against the urging force of the urging member 68b. Therefore, the engagement between the engagement claw portion 67a and the engagement recess portion 67b of the engagement block 67 and the engagement recess portion 65a and the engagement claw portion 65b of the engagement projection portion 65 in the ejection side engagement / disengagement member 54 is released. The engagement between the grip frame engaging portion 32a and the distal end portion of the ejection side engaging / disengaging member 54 is released. Then, since the cam follower 66 of the injection side engaging / disengaging member 54 moves away from the cam block 72 of the gripping frame engaging portion 32a-2 along the inclined cam surface 72a, the cam block 72 is moved by the urging force of the urging member 73b. It moves in the direction of the guide bar 33 (upward direction in FIG. 15).

  Therefore, as shown in FIG. 16, the lock plate 75a of the guide bar engaging block 75 at the distal end portion 33a of the guide bar 33 is engaged with the engaging convex portion 72b of the cam block 72 at the gripping frame engaging portion 32a-2. The engaging projection 72b and the gripping frame 32 are sandwiched between the opposite surface of the rotating frame 31. As a result, the grip frame 32 is locked to the distal end portion 33 a of the guide bar 33. Therefore, the grip frame 32 does not slide along the guide bar 33, and the distance from the center of the support column 47 to the grip frame 32 is maintained constant.

  When mold closing is performed at the injection station, the grip frame 32 and the tip 33a of the guide bar 33 are unlocked by an operation reverse to the above-described operation, and the grip frame engaging portion 32a and the injection side are released. The distal end portion of the engagement / disengagement member 54 is engaged, and a state as shown in FIGS.

  Next, operation | movement of the injection blow molding machine 10 whole structure of the said structure is demonstrated.

  FIG. 17 is a longitudinal sectional view of the injection blow molding machine according to the embodiment of the present invention and shows a first operation, and FIG. 18 is a longitudinal sectional view of the injection blow molding machine according to the embodiment of the present invention. FIG. 19 is a longitudinal sectional view of the injection blow molding machine according to the embodiment of the present invention, and FIG. 20 is a third view illustrating the operation. FIG. 20 is a longitudinal section of the injection blow molding machine according to the embodiment of the present invention. FIG. 21 is a plan view of the fourth embodiment showing the operation, FIG. 21 is a vertical sectional view of the injection blow molding machine in the embodiment of the present invention, and FIG. 22 shows the operation, and FIG. 22 is in the embodiment of the present invention. 6 is a first view showing the operation of the screw split mold of the injection blow molding machine, and is a view taken in the direction of the arrow G in FIG. 6, and FIG. 23 shows the operation of the screw split mold of the injection blow molding machine in the embodiment of the present invention. FIG. 24 is a second view and is a view as viewed from the arrow J in FIG. 22, and FIG. 24 is an injection blow in the embodiment of the present invention. K arrow view of there view 23 in the third diagram showing a screw split operation of the molding machine, FIG. 25 is a diagram showing an operation sequence of the injection blow molding machine according to the embodiment of the present invention.

  In the present embodiment, each part of the injection blow molding machine 10 operates as shown in FIG. In this case, in one molding cycle, the number of preforms 61 equal to the number of female mold parts 51, for example, 12 preforms 61 are molded by injection molding at the injection station, and the previous molding cycle is performed at the blowing station. The 12 preforms 61 molded at the injection station are blow-molded, and 12 final molded products 62 are molded.

  First, as shown in FIGS. 1 to 4, from a state where the mold is opened at the injection station and the blowing station, a mold clamping device (not shown) is operated to start the mold closing. Thereby, the movable platen 12 moves from the open state toward the closed state, that is, moves closer to the fixed platen 11. Then, while the movable platen 12 moves from the open state to the closed state, the intermediate drive cylinder device 22 is operated, and the intermediate support frame 21 is moved from the open state to the closed state. That is, it moves so as to approach the fixed platen 11.

  Further, while the movable platen 12 moves from the open state to the closed state, the intermediate mold support frame 21 is attached to the side surface of the rotary frame 31 on the fixed platen 11 side by approaching the fixed platen 11. The grip frame engaging portion 32 a of the grip frame 32 engaged with the tip portion 33 a of the guide bar 33 comes into contact with the tip portion of the ejection side engaging / disengaging member 54 attached to the fixed platen 11. Thereby, the engagement between the grip frame engaging portion 32a and the tip end portion 33a of the guide bar 33 is released, and the lock between the grip frame 32 and the guide bar 33 is released.

  Similarly, when the movable platen 12 moves from the open state to the closed state, the intermediate mold support frame 21 is attached to the side surface of the rotary frame 31 on the movable platen 12 side by approaching the movable platen 12. The grip frame engaging portion 32 a of the grip frame 32 engaged with the tip portion 33 a of the guide bar 33 comes into contact with the tip portion of the blowing side engagement / disengagement member 55 attached to the movable platen 12. Thereby, the engagement between the grip frame engaging portion 32a and the tip end portion 33a of the guide bar 33 is released, and the lock between the grip frame 32 and the guide bar 33 is released. The screw split mold 52a in the gripping frame 32 grips twelve preforms 61 molded at the injection station in the previous molding cycle.

  Further, while the movable platen 12 moves from the open state to the closed state, the split drive cylinder device 17 operates, and the drive side movable portion 14a and the driven side movable portion 14b move in the lateral direction (FIG. 17). Is moved in a direction perpendicular to ˜21 to be joined and closed to form a blow molding female mold 58 together with the fixed bottom portion 14c. As a result, as shown in FIG. 8, the opening for the blow molding female mold 58 formed by the driving side movable portion 14a and the driven side movable portion 14b is used for screws in a state where the preform 61 is gripped. The split mold 52a is pressed. Therefore, the flange part of the preform 61 is pressed against the outer surface of the opening part of the blow-molding female mold 58, and the part ahead of the collar part enters the blow-molding female mold 58.

  When the movable platen 12 is in a closed state, as shown in FIG. 17, mold closing is completed at the injection station and the blowing station. In this case, since the holding frame 32 at the injection station and the blowing station is unlocked from the guide bar 33, the gripping frame 32 is pushed by the distal end portions of the injection side engaging / disengaging member 54 and the blowing side engaging / disengaging member 55 to guide the guide bar 33. And is in contact with the core mold 41.

  In this case, at the injection station, each male part 42 b enters each female part 51 attached to the fixed mold 13. Further, the screw split mold 52a in which the half parts are coupled to each other is sandwiched between the female mold part 51 and the injection core mold 42 in a state of being fitted in the vicinity of the inlet of the female mold part 51. ing. Thereby, a cavity is formed between the inner surface of the female mold part 51 and the split mold 52a for screw and the outer surface of the male mold part 42b. Further, in the blowing station, the flange portion of the preform 61 is pressed against the outer surface of the opening portion of the blow molding female mold 58, and the portion ahead of the flange portion enters the blow molding female mold 58.

  Subsequently, an injection process is performed at the injection station, the nozzle 16a at the tip of the heating cylinder 16 is pressed against the nozzle touch portion 13a of the fixed mold 13, and the resin is injected from the tip of the nozzle 16a. The injected resin passes through the sprue 13b, the runner 13c, and the hot runner nozzle 13d, and is filled into a cavity formed between the female mold portion 51 and the corresponding male mold portion 42b. In addition, even after the filling of the resin is completed, the closed state is continued and the resin in the cavity is cooled.

  Further, blow molding is performed at the blowing station, the stretching rod driving device 46 is operated, and the stretching rod 44 projects toward the back side of the blow molding female mold 58. Thus, the preform 61 enters the inside of the preform 61 and is stretched toward the back side of the blow molding female mold 58. At the same time, the preform 61 is expanded by blowing high-pressure air into the preform 61 from the blowing guide 43, the extending rod 44, or an air flow path, an air blowing hole (not shown) formed therebetween. Then, it is pressed against the inner surface of the female mold 58 for blow molding. Accordingly, a bottle-shaped or bottle-shaped bottomed container having the shape of the inner surface of the blow-molding female mold 58 can be formed as the final molded product 62. In addition, when extending | stretching is complete | finished, the extending | stretching rod 44 will be returned to the original position from the protruded state.

  When the blow molding is completed, the mold clamping device is actuated to move the movable platen 12 in the direction indicated by the arrow in FIG. 18, that is, from the closed state to the open state. The time from the start to the end of blow molding varies depending on the material, size, wall thickness, and the like of the preform 61 and the final molded product 62, but here is approximately 0.2 [seconds]. It will be explained as a thing. At this point, since the intermediate mold support frame 21 is kept closed with the fixed mold 13 by the intermediate mold drive cylinder device 22, the mold closed state is maintained at the injection station as shown in FIG. The cooling of the resin in the cavity continues. The force generated by the intermediate mold drive cylinder device 22 is weaker than the force generated by the mold clamping device, but is sufficient to maintain the mold closed state when the resin in the cavity is cooled. Yes.

  Here, since the gripping frame engaging portion 32a of the gripping frame 32 is engaged with the distal end portion of the blowing side engaging / disengaging member 55, when the movable platen 12 moves toward the open state, the axis of the guide bar 33 It slides in the direction and reaches the tip 33a of the guide bar 33. Then, the grip frame engaging portion 32a releases the engagement with the distal end portion of the blowing side engagement / disengagement member 55 and engages with the distal end portion 33a of the guide bar 33, so that the grip frame 32 and the guide bar 33 are engaged with each other. Locked. In this case, the distance between the intermediate mold support frame 21 and the gripping frame 32 is a distance α as shown in FIG.

  Subsequently, the grip release driving device 45 is operated, and the grip release member 48 moves forward, that is, moves toward the movable platen 12. Accordingly, as shown in the lower half of FIG. 24, the protruding member 48 a of the grip release member 48 enters the notch of the grip release driven member 52 c of the molded product gripping device 52 attached to the grip frame 32, thereby releasing the grip. The halved portion of the driven member 52c is expanded laterally. As a result, the halved portion of each slide plate 52b of the molded product gripping device 52 and the halved portion of each screw split mold 52a are also spread and divided in the horizontal direction. The grip can be released.

  By the way, as shown in FIGS. 22 to 24, the molded product gripping device 52 has a screw split mold 52 a and a slide plate 52 b to which the screw split mold 52 a is attached. As shown in FIG. 22, the screw split mold 52 a has two rows of six rows arranged in the vertical direction. Here, the screw split mold 52a is formed with a spiral groove for forming a male screw on the inner peripheral surface, fits in the vicinity of the inlet of the female mold part 51, and is inserted between the corresponding male mold part 42b. A cavity corresponding to the mouth of the reform 61 is formed. Further, the screw split mold 52a has a configuration that can be divided in the lateral direction (left and right direction in FIG. 22), and the split part of each screw split mold 52a is attached to the split part of the slide plate 52b, respectively. It has been. The slide plate 52b extends vertically and is attached to the gripping frame 32. Each of the slide plates 52b has a configuration in which each slide plate 52b can be divided in the horizontal direction. It fits in 32 grooves and is slidably attached in the lateral direction. Then, as shown in FIG. 22, the halved portions of the slide plates 52b are urged in the central direction by an urging member 52d such as a spring member and are coupled to each other. Thereby, the half part of each screw split mold 52a is also urged in the center direction so as to be coupled to each other. In FIG. 22, for convenience of explanation, the left half shows a state in which the half part of the screw split mold 52 a and the half part of the slide plate 52 b are connected to each other, and the right half shows the screw split mold 52 a. The state which the half part and the half part of the slide plate 52b were pushed and expanded and divided | segmented is shown.

  A grip release driven member 52c is attached to the vicinity of the upper and lower ends of each slide plate 52b. The grip release driven member 52c has a configuration that can be divided in the lateral direction, and a half portion of each grip release follower member 52c is attached to a half portion of the slide plate 52b. When the halved portions of the slide plate 52b are urged in the central direction and coupled to each other, the halved portions of the grip release follower member 52c are also coupled to each other, as shown in the upper half of FIG. A wedge-shaped notch is formed. The notch is located at a position corresponding to the protrusion member 48a of the grip release member 48. When the grip release member 48 moves forward, the protrusion member 48a enters the notch, and the half portion of the grip release follower member 52c is in the lateral direction. To be spread out. As a result, the halved portion of each slide plate 52b and the halved portion of each screw split mold 52a are also spread and divided in the lateral direction, so that after the blow molding is completed at the blowing station, the final molded product The 62 mouths can be released. In FIG. 24, for convenience of explanation, the upper half shows a state in which the half part of the screw split mold 52a, the half part of the slide plate 52b, and the half part of the grip release driven member 52c are coupled to each other. The protrusion member 48a of the grip release member 48 advances to the lower half to spread the half part of the grip release follower member 52c, the half part of the screw split mold 52a, the half part of the slide plate 52b, and the grip release follower. The state which the half part of the member 52c was divided | segmented is shown. In FIG. 23, for convenience of explanation, the upper grip release member 48 is not advanced, the lower grip release member 48 is advanced, and the protruding member 48a pushes the halved portion of the grip release driven member 52c. It shows the state of spreading.

  When the movable platen 12 further moves from the position shown in FIG. 18 toward the opened state and returns to the position when the mold closing is started, as shown in FIG. And the gripping frame 32 is a distance β. In the injection station, the mold closed state with the fixed mold 13 is maintained, and the cooling of the resin in the cavity is continued. The distance β is sufficient to allow the molded product gripping member 63 of the molded product take-out apparatus to enter, take out the final molded product 62 from the movable split mold 14, and carry it out of the injection blow molding machine 10. It is a long distance.

  The molded product take-out device is a device similar to a manipulator, a robot hand or the like used for taking out a molded product in a normal injection molding machine or the like. The molded product gripping member 63 stands by at the side or above the injection blow molding machine 10, and when it is time to take out the final molded product 62 from the movable split mold 14, between the upper and lower or left and right tie bars 15. Passing and entering between the movable split mold 14 and the gripping frame 32 as shown in FIG. Subsequently, the molded product gripping member 63 approaches the movable split mold 14 and grips the mouth of the final molded product 62 protruding outward (right side in FIG. 19) from the opening of the blow molding female mold 58. .

  At this time, the left and right split drive cylinder devices 17 operate in synchronization, and the drive side movable portion 14a and the driven side movable portion 14b are moved in the opposite directions to be divided. Further, the movable bottom member 14e is driven by a driving device (not shown) to slightly protrude from the fixed bottom portion 14c, and the final molded product 62 is protruded and released. Thus, all twelve final molded products 62 are attached to the inner surface of the blow molding female mold 58 constituted by the driving side movable portion 14a, the driven side movable portion 14b, the fixed bottom portion 14c, and the movable bottom member 14e. Instead, it is gripped by the molded product gripping member 63. Then, the molded product gripping member 63 moves in a direction away from the movable split mold 14, that is, in the direction of the gripping frame 32 in a state where all the 12 final molded products 62 are gripped. Passes between the tie bars 15 and exits outside the injection blow molding machine 10. In this case, since the value of the distance β is sufficiently large, the molded product gripping member 63 can move away in the direction away from the movable split mold 14 while the final molded product 62 is gripped. Thereafter, the final molded product 62 is conveyed by the molded product gripping member 63 and placed at a predetermined placement location (not shown). The molded product gripping member 63 of the molded product take-out apparatus enters between the movable platen 12 and the gripping frame 32 to take out the final molded product 62 from the movable split mold 14 and carry it out of the injection blow molding machine 10. The time until the change varies depending on the type of the molded product take-out device, the size of the final molded product 62, and the like, but here, it will be described as being about 2.0 [seconds].

  Then, when the removal of the final molded product 62 is completed, the intermediate mold drive cylinder device 22 is operated, and the intermediate mold support frame 21 moves from the closed state to the open state, that is, moves away from the fixed platen 11. To do. At this time, the resin in the cavity is sufficiently cooled, and the preform 61 is molded. Note that the time from the start of injection molding until the resin is sufficiently cooled varies depending on the material, size, thickness, etc. of the preform 61, but here it is about 6.0 [seconds]. It will be explained as a thing. Since the core mold 41 moves together with the intermediate mold support frame 21, the male mold part 42 b is pulled out from the female mold part 51 attached to the fixed mold 13. In addition, since the gripping frame engaging portion 32a of the gripping frame 32 at the injection station is engaged with the distal end portion of the injection side engaging / disengaging member 54, even if the intermediate mold support frame 21 moves toward the open state, The gripping frame 32 slides in the axial direction of the guide bar 33, and the screw split mold 52 a maintains a state where it is fitted in the vicinity of the inlet of the female mold part 51. When the grip frame 32 reaches the distal end portion 33a of the guide bar 33, the grip frame engaging portion 32a releases the engagement with the distal end portion of the ejection side engagement / disengagement member 54, and the distal end portion 33a of the guide bar 33 Since it engages, the holding frame 32 and the guide bar 33 are locked.

  Subsequently, when the intermediate mold support frame 21 further moves away from the fixed platen 11, the gripping frame 32 also moves, so that the screw split mold 52 a is pulled out from the female mold part 51. In this case, the halved portion of the screw split mold 52a is urged in the central direction by the urging member 52d and is coupled to each other, so that the mouth portion of the preform 61 is gripped. In this case, the screw split mold 52a includes a spiral groove for forming a male screw on the inner peripheral surface, and a male screw is formed in the mouth portion of the preform 61 by the spiral groove, and the spiral groove and the male screw are associated with each other. Match. Further, even when a force is applied in the axial direction of the preform 61, the grip of the split portion 52a for the screw on the mouth portion of the preform 61 does not come off. Therefore, even if the preform 61 is attached to the inner surface of the female mold part 51, the preform 61 is reliably pulled out from the female mold part 51 by the screw split mold 52a.

  As a result, as shown in FIG. 20, the gripping frame 32 at the injection station reaches a position away from the fixed mold 13 in a state where the screw split mold 52 a grips all twelve preforms 61. Since the intermediate mold support frame 21 is moved away from the fixed platen 11 while the movable platen 12 is stopped, the distance between the movable platen 12 and the gripping frame 32 is based on the distance β shown in FIG. Is also getting smaller. In this case, the distance from the center of the support column 47 to the fixed mold 13 and the distance from the center of the support column 47 to the movable split mold 14 are substantially equal to each other, and the rotary frame 31 rotates around the support column 47. However, the distance is such that the gripping frame 32 is not in contact with either the fixed mold 13 or the movable split mold 14.

  As shown in FIG. 20, when the gripping frame 32 is rotated in a state where the left and right gripping frames 32 are locked to the distal end portion 33 a of the guide bar 33, the rotation radius is maximized when the two gripping frames are used. These are upper and lower end portions on the outer surface of 32 (the surface away from the support column 47). Therefore, the distance from the center of the support column 47 to the fixed mold 13 and the distance from the center of the support column 47 to the movable split mold 14 are set to the upper and lower end portions on the outer surfaces of the two gripping frames 32 from the center of the support column 47. If the distance is longer than the distance up to, the gripping frame 32 including the preform 61 is in contact with both the fixed mold 13 and the movable split mold 14 even if the rotary frame 31 rotates around the support column 47. There is no. Note that the distance from the center of the support column 47 to the fixed mold 13 and the distance from the center of the support column 47 to the movable split mold 14 are the upper and lower end portions on the outer surface of the left and right gripping frames 32 from the center of the support column 47. It is not preferable to make the distance much longer than the above-mentioned distance because the entire length of the injection blow molding machine 10 becomes longer.

  Subsequently, the electric motor 34 operates to rotate the rotary frame 31 around the support column 47 as shown in FIG. The rotating frame 31 is rotated 180 degrees in a direction (counterclockwise direction) indicated by an arrow in FIG. As a result, the gripping frame 32 with the screw split mold 52a gripping the preform 61 moves from the injection station to the blowing station, and the other gripping frame 32 moves from the blowing station to the injection station.

  Note that the core mold 41 is not rotated. In this case, as shown in FIGS. 3 and 5, the rotary frame 31 and the guide bar 33 are located on the left and right outer sides of the core mold 41, so that the core mold 41 and the core mold 41 are rotated even when rotated. There is no contact with members such as the grip release driving device 45 and the stretching rod driving device 46 attached to the outer surface of the belt. However, since the grip frame 32 connects the left and right guide bars 33, if the distance from the center of the support column 47 is short, the inner surface of the grip frame 32 (the surface closer to the support column 47) is a grip release drive device. 45, there is a possibility that it will come into contact with the stretching rod driving device 46 or the like. Therefore, the length of the guide bar 33 is set such that the inner surface of the gripping frame 32 does not come into contact with the grip release driving device 45, the stretching rod driving device 46, and the like.

  When the rotating frame 31 is rotated in a state where the two gripping frames 32 are locked to the distal end portion 33 a of the guide bar 33, the rotation radius becomes the minimum at the central portion on the inner surface of the two gripping frames 32. . On the other hand, in the core mold 41 and the members attached to the outer surface of the core mold 41, the distance from the center of the support column 47 is the longest, the tip portion of the protruding member 48a of the grip release member 48, the uppermost position. And a distal end portion of the extending rod 44 disposed at the lowest position, a distal end portion of the male part 42b disposed at the uppermost and lowermost positions, a rear outer end portion of the extending rod driving device 46, and the like. Therefore, from the center of the support column 47, the distal end portion of the protruding member 48a of the grip release member 48, the distal end portion of the extending rod 44 disposed at the uppermost and lowermost positions, the male portion disposed at the uppermost and lowermost positions. The length of the guide bar 33 is such that the distance from the center of the support column 47 to the central portion of the inner surface of the gripping frame 32 is longer than the distance to the tip portion of 42b, the rear outer end portion of the driving device 46 for the extending rod, etc. Is set. In this case, it is not preferable to make the length of the guide bar 33 too long because the entire length of the injection blow molding machine 10 becomes long. When rotating the rotating frame 31, the gripping frame 32 is locked to the tip 33a of the guide bar 33, so that the gripping frame 32 does not slide along the guide bar 33 during rotation. The distance from the center of the support column 47 to the grip frame 32 is kept constant.

  When the rotation of the rotary frame 31 is completed, the mold is opened at the injection station and the blowing station as in the beginning. Thereby, one molding cycle is completed. Thereafter, the above-described operation is repeatedly executed, and a predetermined number of molding cycles are repeated.

  As described above, in the present embodiment, the gripping frame 32 locks or unlocks the distal end portion 33a of the guide bar 33 in conjunction with mold closing and mold opening at the injection station and the blowing station. Yes. Therefore, when the mold opening is completed at the injection station and the preform 61 is transported to the blowing station, the gripping frame 32 is automatically locked to the tip 33a of the guide bar 33 by mechanical means. There is no need to check the operation. Therefore, the time required for the molding cycle can be shortened and the apparatus cost can be reduced.

  The grip frame engaging portion 32a of the guide bar 33 is actuated by the injection side engaging / disengaging member 54 and the blowing side engaging / disengaging member 55 to engage and disengage the distal end portion 33a of the guide bar 33. The engagement / disengagement and engagement of the distal end portions of the ejection side engagement / disengagement member 54 and the blowing side engagement / disengagement member 55 is performed. In this case, the engagement block 67 and the cam block 72 are operated by the cam mechanism including the cam follower 66, the engagement release cam portion 67c, the biasing member 68b, the inclined cam surface 72a, the biasing member 73b, the engagement release cam 75b, and the like. Then, the distal end portion 33a of the guide bar 33 and the distal end portions of the ejection side engaging / disengaging member 54 and the blowing side engaging / disengaging member 55 are disengaged and engaged. Therefore, engagement and disengagement can be reliably performed with a simple configuration. Therefore, the manufacturing cost of the apparatus can be reduced, the maintenance is facilitated, and there is no need to check the operation.

  In the present embodiment, only the operation when the mold opening timing is different between the injection station and the blowing station has been described, but the mold opening timings at the injection station and the blowing station can be matched.

  Moreover, when performing the blow molding, the operation when the preform 61 is stretched by the stretching rod 44 has been described. However, the stretching of the preform 61 by the stretching rod 44 can be omitted.

  Furthermore, the present invention is not limited to the above-described embodiment, and various modifications can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention.

It is a top view of the injection blow molding machine in embodiment of this invention. It is a front view of the injection blow molding machine in the embodiment of the present invention. It is a plane sectional view of the injection blow molding machine in the embodiment of the present invention, and is a sectional view taken along arrow A in FIG. It is a longitudinal cross-sectional view of the injection blow molding machine in embodiment of this invention, and is B sectional view taken on the line of FIG. It is a plane sectional view of the injection blow molding machine in the embodiment of the present invention, and is a sectional view taken along arrow C in FIG. It is a longitudinal cross-sectional view of the injection blow molding machine in embodiment of this invention, and is D sectional drawing of FIG. It is a front fragmentary sectional view of the injection blow molding machine in an embodiment of the invention, and is a figure showing the state where a mold was closed. It is a principal part enlarged view of the injection blow molding machine in embodiment of this invention, and is the E section enlarged view of FIG. It is a principal part enlarged view of the injection blow molding machine in embodiment of this invention, and is the F section enlarged view of FIG. It is a top view which shows the relationship between the holding frame of the injection blow molding machine in embodiment of this invention, a guide bar, and the injection | emission side engagement / disengagement member. It is a side view which shows the relationship between the holding | grip frame of the injection blow molding machine in embodiment of this invention, a guide bar, and the injection side engagement / disengagement member. It is a cross-sectional view which shows the relationship between the holding | grip frame, guide bar, and injection | emission side engagement / disengagement member of the injection blow molding machine in embodiment of this invention, and is I arrow directional view of FIG. It is a sectional side view which shows the relationship between the holding | grip frame of the injection blow molding machine in embodiment of this invention, a guide bar, and the injection | emission side engaging / disengaging member, and is H arrow line view of FIG. It is a 1st figure which is a side view which shows the relationship between the holding | grip frame of the injection blow molding machine in embodiment of this invention, a guide bar, and the injection side engagement / disengagement member, and shows operation | movement. It is a 2nd figure which is a side view which shows the relationship between the holding | grip frame of the injection blow molding machine in embodiment of this invention, a guide bar, and the injection side engagement / disengagement member, and shows operation | movement. It is a 3rd figure which is a side view which shows the relationship between the holding | grip frame of the injection blow molding machine in embodiment of this invention, a guide bar, and the injection side engagement / disengagement member, and shows operation | movement. It is a 1st figure which is a longitudinal cross-sectional view of the injection blow molding machine in embodiment of this invention, and shows operation | movement. It is a longitudinal cross-sectional view of the injection blow molding machine in embodiment of this invention, and is a 2nd figure which shows operation | movement. It is a longitudinal cross-sectional view of the injection blow molding machine in embodiment of this invention, and is a 3rd figure which shows operation | movement. It is a longitudinal cross-sectional view of the injection blow molding machine in embodiment of this invention, and is the 4th figure which shows operation | movement. It is a longitudinal cross-sectional view of the injection blow molding machine in embodiment of this invention, and is a 5th figure which shows operation | movement. It is the 1st figure which shows operation | movement of the split mold for screws of the injection blow molding machine in embodiment of this invention, and is G arrow line view of FIG. It is the 2nd figure which shows operation | movement of the split mold for screws of the injection blow molding machine in embodiment of this invention, and is J arrow directional view of FIG. It is the 3rd figure which shows operation | movement of the split mold for screws of the injection blow molding machine in embodiment of this invention, and is K arrow line view of FIG. It is a figure which shows the operation | movement sequence of the injection blow molding machine in embodiment of this invention.

Explanation of symbols

11 Fixed platen 12 Movable platen 13 Fixed mold 14 Movable split mold 21 Intermediate mold support frame 31 Rotating frame 32 Grip frames 32a, 32a-1, 32a-2 Grip frame engaging portion 33 Guide bar 33a Tip portion 41 Core mold frame 42 Injection core mold 43 Blow guide 51 Female mold part 52 Molded product gripping device 54 Injection side engaging / disengaging member 55 Blow side engaging / disengaging member 61 Preform

Claims (4)

(A) A molded product gripping device of a molding machine that is disposed between a pair of molding dies that face each other and perform mold closing and mold opening, and grips a molded product,
(B) The molded product gripping device is attached to a gripping frame movable along a guide bar attached to one of the pair of molding dies or the support device of the molding die ,
(C) the gripping frame includes a gripping frame engaging portion;
(D) The gripping frame engaging portion is operated by an engaging / disengaging member attached to the other of the pair of forming dies or the supporting device of the forming dies, and engages and disengages the tip end portion of the guide bar. And performing engagement release and engagement with the distal end portion of the engagement / disengagement member,
(E) The gripping frame moves in the direction of mold closing and mold opening so as to come in contact with and separate from at least one of the pair of molds in conjunction with mold closing and mold opening. moldings gripping device of a molding machine, characterized in Rukoto locked to the distal end of the guide bar. 2. The molded product gripping apparatus according to claim 1 , wherein the gripping frame engaging portion engages and disengages the distal end portion of the guide bar and the distal end portion of the engagement / disengagement member by mechanical means. (A) The pair of molds includes a fixed mold attached to an injection mold support device, a movable mold attached to a blow mold support device, and the injection mold support device and the blow mold support. Two of the non-rotatable intermediate molds attached to the intermediate mold support device disposed between the apparatus and the injection core mold and the blowing guide;
(B) The molded product gripping device of the molding machine according to claim 1 or 2 , wherein the gripping frame is rotatably attached to the intermediate mold support device. The gripping frame is rotated 180 degrees, and the movable mold is inserted between the fixed mold and the injection core mold in a state where an intermediate molded product molded by injection molding is gripped by the molded product gripping device. The molded product gripping device for a molding machine according to claim 3 , wherein the molded product gripping device is moved between a mold and the blowing guide.

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