JP2008238741A - Mold clamping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold clamping device which can mold a molding of high precision by reducing the influence of suction force generated between a stator and a needle on the movement on a guide rail of a movable platen. <P>SOLUTION: The mold clamping device 100 is equipped with the movable platen 112 which is set opposite to a fixed platen 111 and moved forward/backward, the needle 131 of a linear motor 128 which moves the movable platen 112 forward/backward, a first guide rail Gd1 which guides the forward/backward movement of the movable platen 112, and a second guide rail Gd2 which guides the forward/backward movement of the needle 131 of the linear motor 128 and is installed to be separated from the first guide rail Gd1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mold clamping device, and more specifically to a mold clamping device that generates a mold clamping force with an electromagnet.

  As an example of a molding machine, an injection molding machine includes an injection device, a mold device, and a mold clamping device, and is molded by injecting resin from an injection nozzle of the injection device, filling the cavity space of the mold device, and solidifying. Mold the product. The mold apparatus has a fixed mold and a movable mold, and operates the mold clamping apparatus to move the movable mold forward and backward with respect to the fixed mold, thereby performing mold closing, mold clamping, and mold opening.

  As a conventional mold clamping apparatus, a mold clamping apparatus of a type that moves a movable platen back and forth using a toggle mechanism is widely used. In a mold clamping device using a toggle mechanism, a bending moment may act on the movable platen due to the mechanical operation of the toggle mechanism to generate the mold clamping force, and the mold mounting surface of the movable platen is distorted. May occur. In addition, since the mold clamping is performed by extending the toggle mechanism, there is a possibility that the mold clamping force cannot be controlled with high accuracy.

  Therefore, a mold clamping device is proposed that includes an electric motor and an electromagnet, uses an electric motor for mold closing and mold opening operations, and uses the attractive force of the electromagnet for mold clamping operations (see, for example, Patent Document 1). ).

  FIG. 1 is a diagram illustrating a schematic configuration of a mold clamping device that uses an attractive force of an electromagnet for a mold clamping operation.

  Referring to FIG. 1, the mold clamping device 10 is supported on a guide rail Gd including two rails provided on a support frame Fr of an injection molding machine. The stationary platen 11 is placed on the guide rail Gd and is fixed to the support frame Fr and the guide rail Gd.

  A rear platen 13 is disposed at a predetermined distance from the fixed platen 11 and facing the fixed platen 11. Between the fixed platen 11 and the rear platen 13, four tie bars 14 (only two are shown in the figure) are installed as connecting members. The movable platen 12 is disposed along the tie bar 14 so as to be movable in the mold opening / closing direction along the tie bar 14 (movable in the left-right direction in the drawing). For this purpose, a guide hole (not shown) through which the tie bar 14 passes is formed in the movable platen 12.

  A first screw portion (not shown) is formed at the front end portion (right end portion in the figure) of the tie bar 14, and the tie bar 14 is fixed to the fixed platen by screwing and tightening the nut n1 to the first screw portion. 11 is fixed. A guide post 21 having an outer diameter smaller than that of the tie bar 14 is integrally formed at the rear end portion (left end portion in the drawing) of each tie bar 14. The guide post 21 extends from the rear end surface (left end surface in the drawing) of the rear platen 13 so as to protrude rearward. A second screw portion (not shown) is formed in the vicinity of the rear end surface of the rear platen 13 of each guide post 21, and the fixed platen 11 and the rear platen 13 are screwed into the second screw portion with a nut n 2. It is fixed by tightening.

  The rear platen 13 is placed on the guide rail Gd so that it can move slightly with respect to the guide rail Gd as the tie bar 14 expands and contracts. Therefore, the fixed platen 11 is fixed to the support frame Fr and the guide rail Gd, and the rear platen 13 can move slightly with respect to the guide rail Gd.

  A fixed mold 15 is fixed to the fixed platen 11, and a movable mold 16 is fixed to the movable platen 12. A mold apparatus 19 is configured by the fixed mold 15 and the movable mold 16. As the movable platen 12 advances and retreats, the movable mold 16 is moved with respect to the fixed mold 15 to perform mold closing, mold clamping, and mold opening. When the mold clamping is performed, a cavity space is formed between the fixed mold 15 and the movable mold 16, and resin as a molding material injected from the injection nozzle 18 of the injection device 17 is filled into the cavity space. The

  An attracting plate 22 as a magnetic body disposed in parallel with the movable platen 12 is disposed behind the rear platen 13 so as to be able to advance and retreat along each guide post 21 and is guided by the guide post 21. A guide hole 23 through which the guide post 21 penetrates is formed in the suction plate 22 at a position corresponding to each guide post 21. The guide hole 23 includes a large-diameter portion 24 opened on the front end surface (right end surface in the drawing) and a small-diameter portion 25 connected thereto. The large diameter portion 24 accommodates the nut n2. The small-diameter portion 25 opens at the rear end surface of the suction plate 22 and has a sliding surface on which the guide post 21 slides.

  In order to move the movable platen 12 back and forth, a linear motor 28 is disposed between the suction plate 22 connected to the movable platen 12 and the support frame Fr as a mold opening / closing drive unit. The linear motor 28 includes a stator 29 arranged on the support frame Fr in parallel with the guide rail Gd and corresponding to the moving range of the suction plate 22, and a slide base Sb to which the lower end of the suction plate 22 is fixed. The movable member 31 is fixed to the stator 29 and is opposed to the stator 29 and formed over a predetermined range. The slide base Sb is supported on the guide rail Gd on both sides thereof, and supports the mover 31 so as to be movable along the stator 29. The slide base Sb covers the upper surface of the mover 31 and extends in the extending direction of the guide rail Gd.

  A guide base Gb is provided at the lower end of the movable platen 12, and the guide base Gb is supported on the guide rail Gd and movably supports the movable platen 12 on the guide rail Gd. Further, the suction plate 22 is attached to a mounting plate 27 that is vertically installed from the slide base Sb. The mounting plate 27 has a rib 27a, and a reaction force of the mold clamping force is applied to the mounting plate 27. Even if it acts, the mounting surface of the mounting plate 27 is not tilted, and the verticality is maintained.

  The mover 31 includes a core 34 protruding toward the stator 29 and having a plurality of magnetic pole teeth 33 formed at a predetermined pitch, and a coil 35 wound around each magnetic pole tooth 33. The magnetic pole teeth 33 are formed in parallel to each other in a direction perpendicular to the moving direction of the movable platen 12. The stator 29 includes a core and a permanent magnet (not shown) formed to extend on the core. The permanent magnet is formed by magnetizing the N and S magnetic poles alternately and at the same pitch as the magnetic pole teeth 33.

  Therefore, when a predetermined current is supplied to the coil 35 and the linear motor 28 is driven, a propulsive force is generated, and the mover 31 is moved back and forth. Along with this, the slide base Sb, the suction plate 22 fixed to the slide base Sb, and the movable platen 12 connected to the suction plate 22 by the rod 39 are moved forward and backward to perform mold closing and mold opening.

  When the movable platen 12 moves forward (moves in the right direction in the figure) and the movable mold 16 comes into contact with the fixed mold 15, the mold closing is completed. An electromagnet unit 37 as a mold-clamping drive unit is disposed between the rear platen 13 and the suction plate 22 so that mold clamping can be performed following mold closing.

  The electromagnet unit 37 includes an electromagnet 49 disposed on the rear platen 13 side, and an attracting portion 51 disposed on the attracting plate 22 side. Two grooves 45 as a coil arrangement portion having a rectangular cross-sectional shape extending in the horizontal direction are formed in parallel to each other at a predetermined portion of the rear end surface of the rear platen 13, that is, slightly above and below the rod 39. Yes. A core 46 having a rectangular cross-sectional shape is formed between the grooves 45, and a yoke 47 is formed in a portion other than the core 46 of the rear platen. A coil 48 is wound around the core 46.

  A rod 39 that connects the movable platen 12 and the suction plate 22 extends through the rear platen 13 and the suction plate 22. The rod 39 advances and retracts the movable platen 12 in conjunction with the advance and retreat of the suction plate 22 when the mold is closed and opened, and transmits the mold clamping force generated by the electromagnet unit 37 to the movable platen 12 when the mold is clamped.

As described above, in the mold clamping apparatus 10 shown in FIG. 1, the slide base Sb in which the rear platen 13 and the suction plate 22 are provided in the upper portion and the movable element 31 is provided in the lower portion, and the guide in which the movable platen 12 is provided in the upper portion. The base Gb is provided on the same guide rail Gd and has a structure that moves on the same guide rail Gd.
International Publication No. 2005/090053 Pamphlet

  However, in the mold clamping device 10 shown in FIG. 1, the following problems may occur with respect to the movement of the movable platen 12 on the guide rail Gd via the guide base Gb.

  FIG. 2 is a view for explaining such a problem, and is a view as seen from the direction of the arrow X in FIG.

  Referring to FIG. 2, the linear motor 28 includes a stator 29 having a permanent magnet (not shown) formed by alternately providing N-pole and S-poles, and a coil 35 (see FIG. 1). ) Provided with a movable element 31. When the linear motor 28 is driven by supplying a predetermined current to the coil 35, a propulsive force is generated, and the mover 31 is moved forward and backward.

  On the other hand, a suction force indicated by a black arrow in FIG. 2 is generated between the stator 29 and the mover 31, and this suction force may be larger than the propulsive force generated by the linear motor 28.

  As a result, a moment acts, and as shown by a dotted line in FIG. 2, a support frame Fr provided with a guide rail Gd on the upper side, and a slide base Sb provided with an adsorption plate 22 on the upper side and a guide base Gb on the lower side. However, the guide rail Gd provided on the support frame Fr may be pulled outward and bend as a result.

  As described above, in the mold clamping apparatus 10 shown in FIG. 1, the slide plate Sb in which the rear platen 13 and the suction plate 22 are provided in the upper part and the movable element 31 is provided in the lower part, and the movable platen 12 is provided in the upper part. The guide base Gb is provided on the same guide rail Gd and has a structure that moves on the same guide rail Gd.

  Therefore, such a deformation of the guide rail Gd hinders the linearity in the movement of the movable platen 12 to which the movable mold 16 is fixed, and the desired cavity space between the fixed mold 15 and the movable mold 16 is reduced. The formation may be adversely affected, and the accuracy of the molded product that is filled in the cavity space and molded may be reduced.

  In addition, it is conceivable to increase the size of the guide in order to ensure accuracy, but in this case, the cost increases and the entire apparatus also increases.

  Therefore, the present invention has been made in view of the above points, and reduces the influence of the suction force generated between the stator and the mover on the movement of the movable platen on the guide rail, thereby improving accuracy. It is an object of the present invention to provide a mold clamping device having a structure capable of molding a molded product having a high height.

  According to one aspect of the present invention, a movable platen that is provided opposite to a fixed platen and moves forward and backward, a mover of a linear motor that moves the movable platen back and forth, and a first guide that guides the movement of the movable platen A mold clamping device is provided, comprising: a guide rail; and a second guide rail that guides advancement and retraction of the mover of the linear motor and is provided separately from the first guide rail. . The first guide rail and the second guide rail may be provided on a support frame that supports the mold clamping device.

  The first guide rail and the second guide rail may be provided on the same surface of the support frame.

  The first guide rail and the second guide rail may extend in the same direction, and may be provided apart from each other by a predetermined length in the extending direction. The positioning block may determine straightness of the first guide rail and the second guide rail.

  The first guide rail and the second guide rail may be juxtaposed so as to partially overlap each other. In this case, the second guide rail may be provided outside the first guide rail. Further, a positioning block may be provided on the frame in contact with the mutually opposing surfaces of the first guide rail and the second guide rail provided adjacent to each other. Further, a single positioning block is provided on the frame in contact with the surfaces of the first guide rail and the second guide rail which are provided adjacent to each other on the sides facing each other. It may be. In addition, a positioning block is provided on the frame in contact with a surface of the first guide rail and the second guide rail which are provided adjacent to each other on the opposite side to the opposite side. Also good.

  In the support frame, the portions where the first guide rail and the second guide rail are provided may be arranged at different heights. In this case, the second guide rail may be provided at a location lower than the location where the first guide rail is provided. Further, the first guide rail may be provided at a location lower than a location where the second guide rail is provided.

  According to the present invention, there is provided a structure that can reduce the influence of the suction force generated between the stator and the movable element on the movement of the movable platen on the guide rail and can form a highly accurate molded product. A mold clamping device can be provided.

  Embodiments of the present invention will be described below.

[First Embodiment]
FIG. 3 is a diagram showing a schematic configuration of the mold clamping device according to the first embodiment of the present invention.

  The mold clamping device 100 shown in FIG. 3 is provided on a support frame Fr of an injection molding machine and is supported on a first guide rail Gd1 and a second guide rail Gd2 each composed of two rails. Although details will be described later, in the present embodiment, the first guide rail Gd1 and the second guide rail Gd2 extend in the same longitudinal direction on the upper surface of the support frame Fr, and have a predetermined length in the extending direction. Separately provided.

  The fixed platen 111 is fixed to the support frame Fr by bolts Bl.

  A rear platen 113 is disposed at a predetermined distance from the fixed platen 111 and facing the fixed platen 111. Between the fixed platen 111 and the rear platen 113, four tie bars 114 (only two are shown in the drawing) are installed. The movable platen 112 is disposed along the tie bar 114 so as to be movable in the mold opening / closing direction along the tie bar 114 (movable in the left-right direction in the drawing). For this purpose, a guide hole (not shown) through which the tie bar 114 passes is formed in the movable platen 112.

  In the following description, the mold opening / closing direction, that is, the moving direction of the movable platen 112 is referred to as a horizontal direction, and the direction perpendicular to the moving direction of the movable platen 112 is referred to as a vertical direction.

  A first screw portion (not shown) is formed at the front end portion (right end portion in the figure) of the tie bar 114, and the tie bar 114 is fixed to the fixed platen by screwing and tightening the nut n1 to the first screw portion. 111 is fixed. A guide post 121 having an outer diameter smaller than that of the tie bar 114 is integrally formed at the rear end portion (left end portion in the drawing) of each tie bar 114.

  The guide post 121 extends from the rear end surface (the left end surface in the drawing) of the rear platen 113 so as to protrude rearward. A second screw portion (not shown) is formed in the vicinity of the rear end surface of the rear platen 113 of each guide post 121, and the fixed platen 111 and the rear platen 113 are screwed into the second screw portion with a nut n2. It is fixed by tightening. Although the guide post 121 is formed integrally with the tie bar 114, the guide post 121 may be formed separately from the tie bar 114.

  The rear platen 113 is placed on the second guide rail Gd2 so that it can move slightly with respect to the second guide rail Gd2 as the tie bar 114 expands and contracts. Therefore, the fixed platen 111 is fixed to the support frame Fr and the first guide rail Gd1, and the rear platen 113 can move slightly relative to the guide rail second Gd2. The rear platen 113 may be fixed to the support frame Fr and the second guide rail Gd2, and the fixed platen 111 may be configured to be slightly movable with respect to the first guide rail Gd1.

  A fixed mold 115 is fixed to the fixed platen 111, and a movable mold 116 is fixed to the movable platen 112. A mold apparatus 119 is constituted by the fixed mold 115 and the movable mold 116. As the movable platen 112 advances and retreats, the movable mold 116 is moved relative to the fixed mold 115, and mold closing, mold clamping, and mold opening are performed. When the mold clamping is performed, a cavity space is formed between the fixed mold 115 and the movable mold 116, and resin as a molding material injected from the injection nozzle 118 of the injection device 117 is filled into the cavity space. The

  An attracting plate 122 as a magnetic body disposed in parallel with the movable platen 112 is disposed along the guide posts 121 behind the rear platen 113 and is guided by the guide posts 121. In the suction plate 122, guide holes 123 through which the guide posts 121 pass are formed at positions corresponding to the respective guide posts 121. The guide hole 123 includes a large-diameter portion 124 opened on the front end surface (right end surface in the drawing) and a small-diameter portion 125 connected thereto. The large diameter portion 124 accommodates the nut n2. The small-diameter portion 125 is opened at the rear end surface of the suction plate 122 and has a sliding surface on which the guide post 121 slides.

  Although the suction plate 122 is guided by the guide post 121, the suction plate 122 can be guided not only by the guide post 121 but also by the second guide rail Gd2. Alternatively, it is possible to guide only by the second guide rail Gd2 without using the guide post 121.

  In order to move the movable platen 112 back and forth, a linear motor 128 is disposed between the suction plate 122 connected to the movable platen 112 and the support frame Fr as a mold opening / closing drive unit. The linear motor 128 includes a stator 129 disposed on the support frame Fr in parallel with the guide rail Gd and corresponding to the moving range of the suction plate 22, and a slide base Sb to which the lower end of the suction plate 122 is fixed. And a movable element 131 that is opposed to the stator 129 and formed over a predetermined range. The slide base Sb is supported on the second guide rail Gd2 on both sides thereof, and supports the mover 131 so as to be movable along the stator 129. The slide base Sb covers the upper surface of the movable element 131 and extends in the extending direction of the second guide rail Gd.

  A guide base Gb is provided at the lower end of the movable platen 112, the guide base Gb is supported on the first guide rail Gd1, and the movable platen 12 is movably supported on the first guide rail Gd1. Further, the suction plate 122 is attached to an attachment plate 127 that is vertically installed from the slide base Sb. The attachment plate 127 has a rib 127a, and a reaction force of mold clamping force is applied to the attachment plate 127. Even if it acts, the mounting surface of the mounting plate 127 does not fall down and is configured to maintain the verticality.

  The mover 131 provided at the lower part of the slide base Sb protrudes toward the stator 129 and is wound around each of the magnetic pole teeth 133 and the core 134 having a plurality of magnetic pole teeth 133 formed at a predetermined pitch. A coil 135. The magnetic pole teeth 133 are formed in parallel to each other in a direction perpendicular to the moving direction of the movable platen 112. Stator 129 includes a core and a permanent magnet (not shown) formed to extend on the core. The permanent magnet is formed by magnetizing the N-pole and S-pole magnetic poles alternately and at the same pitch as the magnetic pole teeth 133.

  Accordingly, when a predetermined current is supplied to the coil 135 to drive the linear motor 128, the mover 31 provided on the second guide rail Gd2 is advanced and retracted. Along with that, the movable platen 112 connected to the suction plate 122 by the slide base Sb, the suction plate 122 fixed to the slide base Sb, and the rod 139 is moved forward and backward, and the mold is closed. And mold opening is performed.

  When the movable platen 112 moves forward (moves in the right direction in the figure) and the movable mold 116 contacts the fixed mold 115, the mold closing is completed. An electromagnet unit 137 as a mold clamping drive unit is disposed between the rear platen 113 and the suction plate 122 so that the mold clamping can be performed following the mold closing.

  The electromagnet unit 137 includes an electromagnet 149 disposed on the rear platen 113 side, and an attracting portion 151 disposed on the attracting plate 122 side. Two grooves 145 are formed in parallel with each other at predetermined portions of the rear end surface of the rear platen 113, that is, slightly above and below the rod 139 and having a rectangular cross-sectional shape extending in the horizontal direction. Yes. A core 146 having a rectangular cross-sectional shape is formed between the grooves 145, and a yoke 147 is formed in a portion other than the core 146 of the rear platen 113. A coil 148 is wound around the core 146.

  A rod 139 that connects the movable platen 112 and the suction plate 122 extends through the rear platen 113 and the suction plate 122. The rod 139 advances and retracts the movable platen 112 in conjunction with the advancement and retraction of the suction plate 122 when the mold is closed and opened, and transmits the mold clamping force generated by the electromagnet unit 137 to the movable platen 112 during mold clamping. The mold clamping device includes a support frame Fr, a fixed platen 111, a movable platen 112, a rear platen 113, a suction plate 122, a linear motor 128, an electromagnet unit 137, a rod 139, a first guide rail Gd1, a second guide rail Gd2, and the like. 10 is configured.

  Further, as a predetermined portion of the front end surface of the suction plate 122, a suction portion 151 is provided in a portion surrounding the rod 139 in the suction plate 122 and facing the electromagnet 149. The core 146 and the yoke 147 of the rear platen 113, and the suction plate 122 are made of electromagnetic laminated steel plates formed by laminating thin plates made of ferromagnetic materials. In addition, an electromagnet 149 is provided separately from the rear platen 113 and an adsorbing portion 151 is provided separately from the adsorption plate 122, but an electromagnet is formed as a part of the rear platen 113 and adsorbed as a part of the adsorption plate 122. A part can also be formed. Further, the electromagnetic laminated steel sheet is not necessarily used, and the core 146 and the yoke 147 may be formed using an iron core made of the same member.

  Therefore, in the electromagnet unit 137, when a current is supplied to the coil 148 in the groove 145, the electromagnet 149 is excited and the attracting portion 151 is attracted to generate a clamping force.

  The rod 139 is connected to the suction plate 122 at the rear end portion (left end portion in the drawing), and is connected to the movable platen 112 at the front end portion. The rod 139 moves forward when the suction plate 122 moves forward when the mold is closed, whereby the movable platen 112 moves forward. Further, the rod 139 moves backward when the suction plate 122 moves backward (moves leftward in the drawing) when the mold is opened, and thereby the movable platen 112 moves backward.

  For this purpose, a hole 141 through which the rod 139 passes is provided in the central portion of the rear platen 113. In addition, a hole 142 for penetrating the rod 139 is formed in the central portion of the suction plate 122. Further, a bearing member Br1 such as a bush that slidably supports the rod 139 is disposed facing the opening at the front end of the hole 141. A screw 143 is formed at the rear end of the rod 139, and a nut 144 as a mold thickness adjusting mechanism that is rotatably supported with respect to the suction plate 122 is screwed into the screw 143.

  Incidentally, in the present embodiment, the first guide rail Gd1 and the second guide rail Gd2 extend in the same longitudinal direction on the upper surface of the support frame Fr, and are separated by a predetermined length in the extending direction. Is provided. The first guide rail Gd1 is provided with a movable platen 112 movably provided via a guide base Gb, and the second guide rail Gd2 is provided with a slide 131 in which a movable element 131 of a linear motor 128 is provided at the lower part. The suction plate 122 and the rear platen 113 are movably provided via the base Sb. This structure will be further described in detail with reference to FIG.

  Here, FIG. 4 is a diagram showing an arrangement structure of the first guide rail Gd1 and the second guide rail Gd2 of the mold clamping device 100 according to the first embodiment of the present invention, and FIG. ) Is a top view of the support frame Fr, and FIG. 4B is a side view of the support frame Fr when viewed from the direction indicated by the arrow X in FIG. In FIG. 4, for easy understanding, the slide base Sb in which the movable platen 112 provided on the first guide rail Gd via the guide base Gb and the mover 131 of the linear motor 128 on the lower side are provided. The suction plate 122, the rear platen 113, and the like provided on the second guide rail Gd are omitted.

  Referring to FIG. 4, on the upper surface of the support frame Fr, the first guide rail Gd1 and the second guide rail Gd2 extend in the same longitudinal direction and are separated by a predetermined length in the extending direction. Is provided. Two first guide rails Gd1 and two second guide rails Gd2 face each other in the lateral direction.

  The positioning block Bl is fixed on the support frame Fr by welding. Then, the surface opposite to the welding surface of the positioning block B1 fixed to the frame Fr1 (the outer surface in FIG. 4) is processed so as to have straightness after welding. And the 1st guide rail Gd1 and the 2nd guide rail Gd2 are arrange | positioned so that the said process surface may be contacted, and it is fixing to the flame | frame Fr with the volt | bolt Bl.

  An opening Op for dropping a molded product is formed at a position between the first guide rails Gd1 facing each other in the lateral direction of the support frame Fr.

  As described above, the first guide rail Gd1 and the second guide rail Gd2 extend in the same longitudinal direction on the upper surface of the support frame Fr, and are provided separately with a predetermined length in the extending direction. Yes. Here, the second guide rail Gd2 is arranged behind the position of the movable platen 112 when the movable mold 116 touches the fixed mold 115 or the position of the guide Gd of the movable platen 112.

  Therefore, normally, since the attractive force generated between the stator 29 and the movable element 31 is larger than the propulsive force generated by the linear motor 28, a moment acts, and as shown in FIG. The first guide rail Gd1 is provided even if the slide base Sb provided on the second guide rail Gd2 is deformed into a curved shape having the movable element 131 and the stator 129 as approximate vertices, respectively. The influence on the location is almost cut off by the separated portion between the first guide rail Gd1 and the second guide rail Gd2. Therefore, the above-described deformation hardly occurs at the location where the first guide rail Gd1 is provided.

  Therefore, since the first guide rail Gd hardly deforms, the linearity in the movement of the movable platen 112 to which the movable mold 116 is fixed is hardly hindered, and a desired distance between the fixed mold 115 and the movable mold 116 is obtained. It is possible to reduce the influence on the formation of the cavity space and the precision on the accuracy of the molded product that is filled in the cavity space and molded.

[Second Embodiment]
As described above, in the first embodiment of the present invention, the first guide rail Gd1 and the second guide rail Gd2 extend in the same longitudinal direction on the upper surface of the support frame Fr, and the extending direction. Are separately provided with a predetermined length apart. However, the suction plate 122 and the rear platen 113 are provided via the first guide rail Gd1 in which the movable platen 112 is movably provided via the guide base Gb and the slide base Sb in which the movable element 131 of the linear motor 128 is provided at the lower part. As long as the second guide rail Gd2 is provided separately from the second guide rail Gd2, the present invention is not limited to this structure, and may be the following structure.

  In the following description, parts having the same structure as the above-described parts are given the same reference numerals, and detailed description thereof is omitted.

  FIG. 5 is a view showing an arrangement structure of the first guide rail Gd1 and the second guide rail Gd2 of the mold clamping device according to the second embodiment of the present invention, and FIG. FIG. 5B is a top view of the frame Fr, and FIG. 5B is a side view when the support frame Fr is viewed from the direction indicated by the arrow X in FIG. In FIG. 5, for easy understanding, the slide base Sb in which the movable platen 112 provided on the first guide rail Gd via the guide base Gb and the mover 131 of the linear motor 128 in the lower part are provided. The suction plate 122, the rear platen 113, and the like provided on the second guide rail Gd are omitted.

  Referring to FIG. 5, on the upper surface of the support frame Fr, the first guide rail Gd1 and the second guide rail Gd2 are each formed to extend in the longitudinal direction so as to face each other in the short direction. Yes.

  The first guide rail Gd1 and the second guide rail Gd2 which are provided adjacent to each other are separated by a predetermined length in the short direction so as to partially overlap when viewed in the short direction, and in the longitudinal direction. Separately arranged.

  In the first guide rail Gd1 and the second guide rail Gd2 that are provided adjacent to each other, support is provided so that the positioning block Bl is in contact with each of the surfaces facing each other. It is provided on the frame Fr.

  In addition, an opening Op for dropping a molded product is formed at a location between the first guide rails Gd1 facing each other in the short direction of the support frame Fr.

  On the upper surface of the support frame Fr, each of the first guide rail Gd1 and the second guide rail Gd2 extends in the longitudinal direction so as to be opposed to each other in the lateral direction, and is provided adjacent to each other. The first guide rail Gd1 and the second guide rail Gd2 are separated from each other by a predetermined length in the short direction and arranged separately in the longitudinal direction so that a part thereof overlaps when viewed in the short direction. .

  Therefore, as in the first embodiment of the present invention, the attractive force generated between the stator 29 and the mover 31 is usually larger than the propulsive force generated by the linear motor 28, so that the moment acts. As shown in FIG. 2, the support frame Fr and the slide base Sb provided on the second guide rail Gd2 are deformed into curved shapes having the movable element 131 and the stator 129 as approximate vertices, respectively. However, the influence on the location where the first guide rail Gd1 is provided is almost cut off by the separated portion between the first guide rail Gd1 and the second guide rail Gd2. Therefore, the above-described deformation hardly occurs at the location where the first guide rail Gd1 is provided.

  Therefore, since the first guide rail Gd hardly deforms, the linearity in the movement of the movable platen 112 to which the movable mold 116 is fixed is hardly hindered, and a desired distance between the fixed mold 115 and the movable mold 116 is obtained. It is possible to reduce the influence on the formation of the cavity space and the precision on the accuracy of the molded product that is filled in the cavity space and molded.

  In the present embodiment, the first guide rail Gd1 and the second guide rail Gd2 that are provided adjacent to each other partially overlap each other when viewed in the lateral direction. Can be shortened.

  Furthermore, since the second guide rail Gd on which the suction plate 122 and the like are provided is provided outside the first guide rail Gd1, the portion between the first guide rails Gd1 facing each other in the lateral direction. The opening Op for dropping of the molded product provided in can be formed large.

  Further, as described above, the second guide rail Gd2 is susceptible to the moment generated due to the suction force generated between the stator 29 and the movable element 31, but the second guide rail Gd2 is provided with the suction plate 122 and the like. Since the second guide rail Gd is provided outside the first guide rail Gd1, the second guide rail Gd2 can be easily inspected, which is convenient.

  By the way, in the example shown in FIG. 5, the positioning block Bl is provided on each of the surfaces of the first guide rail Gd1 and the second guide rail Gd2 provided adjacent to each other on the surfaces facing each other. Is provided on the support frame Fr.

  However, the present invention is not limited to such a structure, and may have the following structure.

  FIG. 6 is a view showing a first modification of the arrangement structure of the first guide rail Gd1 and the second guide rail Gd2 of the mold clamping device according to the second embodiment of the present invention. FIG. 6A is a top view of the support frame Fr, and FIG. 6B is a side view of the support frame Fr when viewed from the direction indicated by the arrow X in FIG. In FIG. 6, for easy understanding, the slide base Sb in which the movable platen 112 provided on the first guide rail Gd via the guide base Gb and the mover 131 of the linear motor 128 on the lower side are provided. The suction plate 122, the rear platen 113, and the like provided on the second guide rail Gd are omitted.

  In the example shown in FIG. 6, in the first guide rail Gd1 and the second guide rail Gd2 that are provided adjacent to each other, the positioning block Bl is arranged on the surface opposite to the side facing each other. It is provided on the support frame Fr so as to be in contact with each other.

  In the example shown in FIG. 6 as well, as in the example shown in FIG. 5, the first guide rail Gd1 and the second guide rail Gd2 are each opposed in the short direction by two on the upper surface of the support frame Fr. In addition, the first guide rail Gd1 and the second guide rail Gd2 that are formed so as to extend in the longitudinal direction and are adjacent to each other are arranged in the lateral direction so that a part thereof overlaps when viewed in the lateral direction. Separated in the longitudinal direction by a predetermined length apart.

  Therefore, as in the first embodiment of the present invention, the attractive force generated between the stator 29 and the mover 31 is usually larger than the propulsive force generated by the linear motor 28, so that the moment acts. As shown in FIG. 2, the support frame Fr and the slide base Sb provided on the second guide rail Gd2 are deformed into curved shapes having the movable element 131 and the stator 129 as approximate vertices, respectively. However, the influence on the location where the first guide rail Gd1 is provided is almost cut off by the separated portion between the first guide rail Gd1 and the second guide rail Gd2. Therefore, the above-described deformation hardly occurs at the location where the first guide rail Gd1 is provided.

  Therefore, since the first guide rail Gd hardly deforms, the linearity in the movement of the movable platen 112 to which the movable mold 116 is fixed is hardly hindered, and a desired distance between the fixed mold 115 and the movable mold 116 is obtained. It is possible to reduce the influence on the formation of the cavity space and the precision on the accuracy of the molded product that is filled in the cavity space and molded.

  Similarly to the example shown in FIG. 5, the first guide rail Gd1 and the second guide rail Gd2 that are provided adjacent to each other partially overlap when viewed in the short direction, so that the longitudinal direction The overall length of the apparatus can be shortened.

  The positioning block Bl may be arranged as shown in FIG.

  FIG. 7 is a view showing a second modification of the arrangement structure of the first guide rail Gd1 and the second guide rail Gd2 of the mold clamping device according to the second embodiment of the present invention. FIG. 7A is a top view of the support frame Fr, and FIG. 7B is a side view of the support frame Fr viewed from the direction indicated by the arrow X in FIG. In FIG. 7, for easy understanding, the slide base Sb in which the movable platen 112 provided on the first guide rail Gd via the guide base Gb and the mover 131 of the linear motor 128 on the lower side are provided. The suction plate 122, the rear platen 113, and the like provided on the second guide rail Gd are omitted.

  In the example shown in FIG. 7, in the first guide rail Gd1 and the second guide rail Gd2 that are provided adjacent to each other, a single common positioning block Bl is provided between the surfaces facing each other. It is provided on the support frame Fr so as to contact each of the surfaces. That is, the number of positioning blocks Bl can be reduced as compared with the example shown in FIG.

  In the example shown in FIG. 7 as well, as in the example shown in FIG. 5, two first guide rails Gd1 and two second guide rails Gd2 face each other in the lateral direction on the upper surface of the support frame Fr. In addition, the first guide rail Gd1 and the second guide rail Gd2 that are formed so as to extend in the longitudinal direction and are adjacent to each other are arranged in the lateral direction so that a part thereof overlaps when viewed in the lateral direction. Separated in the longitudinal direction by a predetermined length apart.

  Therefore, as in the first embodiment of the present invention, the attractive force generated between the stator 29 and the mover 31 is usually larger than the propulsive force generated by the linear motor 28, so that the moment acts. As shown in FIG. 2, the support frame Fr and the slide base Sb provided on the second guide rail Gd2 are deformed into curved shapes having the movable element 131 and the stator 129 as approximate vertices, respectively. However, the influence on the location where the first guide rail Gd1 is provided is almost cut off by the separated portion between the first guide rail Gd1 and the second guide rail Gd2. Therefore, the above-described deformation hardly occurs at the location where the first guide rail Gd1 is provided.

  Therefore, since the first guide rail Gd hardly deforms, the linearity in the movement of the movable platen 112 to which the movable mold 116 is fixed is hardly hindered, and a desired distance between the fixed mold 115 and the movable mold 116 is obtained. It is possible to reduce the influence on the formation of the cavity space and the precision on the accuracy of the molded product that is filled in the cavity space and molded.

  Also in this example, as in the example shown in FIG. 5, the first guide rail Gd1 and the second guide rail Gd2 provided adjacent to each other partially overlap when viewed in the short direction. Therefore, the length of the entire device in the longitudinal direction can be shortened.

  Further, as in the example shown in FIG. 5, the second guide rail Gd provided with the suction plate 122 and the like is provided outside the first guide rail Gd1, and thus faces in the short direction. The opening Op for dropping the molded product provided at a location between the first guide rails Gd1 can be formed large.

  Further, as described above, the second guide rail Gd2 is easily affected by the moment generated due to the suction force generated between the stator 29 and the mover 31, but as in the example shown in FIG. Since the second guide rail Gd on which the suction plate 122 and the like are provided is provided outside the first guide rail Gd1, the second guide rail Gd2 can be easily inspected, which is convenient. It is.

[Third Embodiment]
As described above, in the first embodiment of the present invention, the first guide rail Gd1 and the second guide rail Gd2 extend in the same longitudinal direction on the same surface of the support frame Fr. They are provided separately with a predetermined length in the direction. However, the suction plate 122 and the rear platen 113 are provided via the first guide rail Gd1 in which the movable platen 112 is movably provided via the guide base Gb and the slide base Sb in which the movable element 131 of the linear motor 128 is provided at the lower part. However, the first guide rail Gd1 and the second guide rail Gd2 are provided on the same surface of the support frame Fr as long as they are provided separately from the second guide rail Gd2 provided movably. The following structure may be sufficient.

  FIG. 8 is a side sectional view showing the arrangement structure of the first guide rail Gd1 and the second guide rail Gd2 of the mold clamping apparatus according to the third embodiment of the present invention. In FIG. 8, for easy understanding, the first guide rail Gd1, the second guide rail Gd2, the movable platen 112, the rear platen 113, the suction plate 122, the rod 139, the movable element 131, the support frame Fr, the slide base. Only the positional relationship between Sb and the guide base Gb is shown, and the details of these structures and the details of other components such as the mold clamping device are the same as those in the example shown in FIG.

  Referring to FIG. 8, in this example, a step is provided on the upper surface of the support frame Fr, and the second guide rail Gd2 is located at a position lower than the position where the first guide rail Gd1 is provided. It is provided separately from the first guide rail Gd1.

  In this case, since the step acts as a rib, not only the deformation of the frame Fr on which the second guide rail Gd2 is arranged is suppressed, but also the upper stage of the frame Fr on which the first guide rail Gd1 is arranged. Blocks the transmission of bending to the part.

  Therefore, as in the first embodiment of the present invention, the attractive force generated between the stator 29 and the mover 31 is usually larger than the propulsive force generated by the linear motor 28, so that the moment acts. As shown in FIG. 2, the support frame Fr and the slide base Sb provided on the second guide rail Gd2 are deformed into curved shapes having the movable element 131 and the stator 129 as approximate vertices, respectively. However, the influence on the location where the first guide rail Gd1 is provided is almost cut off by the separated portion between the first guide rail Gd1 and the second guide rail Gd2. Therefore, the above-described deformation hardly occurs at the location where the first guide rail Gd1 is provided.

  Therefore, since the first guide rail Gd hardly deforms, the linearity in the movement of the movable platen 112 to which the movable mold 116 is fixed is hardly hindered, and a desired distance between the fixed mold 115 and the movable mold 116 is obtained. It is possible to reduce the influence on the formation of the cavity space and the precision on the accuracy of the molded product that is filled in the cavity space and molded.

  In this example, since the second guide rail Gd2 is provided at a location lower than the location where the first guide rail Gd1 is provided, the rear platen 113 provided on the second guide rail Gd2 and the suction are provided. The size of the plate 122 can be increased. Therefore, it is particularly suitable when a large-capacity mold clamping force is required.

  By the way, contrary to the example of FIG. 8, the first guide rail Gd1 may be provided separately from the first guide rail Gd1 at a location lower than the location where the second guide rail Gd2 is provided. . This will be described with reference to FIG.

  Here, FIG. 9 is a diagram showing a modification of the arrangement structure of the first guide rail Gd1 and the second guide rail Gd2 of the mold clamping device according to the third embodiment of the present invention. Also in FIG. 9, as in FIG. 8, for ease of explanation, the first guide rail Gd <b> 1, the second guide rail Gd <b> 2, the movable platen 112, the rear platen 113, the suction plate 122, the rod 139, and the mover 131 Only the positional relationship among the support frame Fr, the slide base Sb, and the guide base Gb is shown. The details of these structures and the details of other components such as the mold clamping device are the same as the example shown in FIG. Illustration and description are omitted.

  Referring to FIG. 9, in this example, a step is provided on the upper surface of the support frame Fr, and the first guide rail Gd1 is located at a position lower than the position where the second guide rail Gd2 is provided. It is provided separately from the first guide rail Gd1.

  Therefore, as in the first embodiment of the present invention, the attractive force generated between the stator 29 and the mover 31 is usually larger than the propulsive force generated by the linear motor 28, so that the moment acts. As shown in FIG. 2, the support frame Fr and the slide base Sb provided on the second guide rail Gd2 are deformed into curved shapes having the movable element 131 and the stator 129 as approximate vertices, respectively. However, the influence on the location where the first guide rail Gd1 is provided is almost cut off by the separated portion between the first guide rail Gd1 and the second guide rail Gd2. Therefore, the above-described deformation hardly occurs at the location where the first guide rail Gd1 is provided.

  Therefore, since the first guide rail Gd hardly deforms, the linearity in the movement of the movable platen 112 to which the movable mold 116 is fixed is hardly hindered, and a desired distance between the fixed mold 115 and the movable mold 116 is obtained. It is possible to reduce the influence on the formation of the cavity space and the precision on the accuracy of the molded product that is filled in the cavity space and molded.

  In this example, since the first guide rail Gd1 is provided at a location lower than the location where the second guide rail Gd2 is provided, the movable platen 112 provided on the first guide rail Gd1 is provided. The size can be increased. Therefore, it is particularly suitable when it is necessary to increase the size of the movable mold attached to the movable platen 112, such as when manufacturing a large-sized molded product.

[Operation of the mold clamping device according to the embodiment of the present invention]
Next, the operation of the mold clamping apparatus according to the embodiment of the present invention will be described. Since the operation is basically the same as that of each embodiment, the mold clamping device according to the first embodiment of the present invention will be described below as an example.

  When closing the mold from the state in which the movable mold 116 and the fixed mold 115 are open, a current is supplied to the coil 135. As a result, the linear motor 128 is driven, and the suction plate 122 moves forward on the second guide rail Gd2, and the movable platen 112 also moves forward on the first guide rail Gd1, and as shown in FIG. Comes into contact with the fixed mold 115.

  Subsequently, a current is supplied to the coil 148, and the attracting portion 151 of the attracting plate 122, which is a magnetic material, is attracted by the attracting force of the electromagnet 149. As a result, the suction force is transmitted as a clamping force to the movable platen 112 via the suction plate 122 and the rod 139, and the clamping is performed.

  Usually, since the attractive force generated between the stator 29 and the movable element 31 is larger than the propulsive force generated by the linear motor 28, a moment acts, and as shown in FIG. Even if the slide base Sb provided on the second guide rail Gd2 is deformed into a curved shape having the movable element 131 and the stator 129 as approximate vertices, respectively, the first guide rail is used in the embodiment of the present invention. Since Gd1 is provided separately from the second guide rail Gd2, the influence on the location where the first guide rail Gd1 is provided is affected by the first guide rail Gd1 and the second guide rail Gd2. Mostly blocked by the separated portion. Therefore, the above-described deformation hardly occurs at the location where the first guide rail Gd1 is provided.

  Therefore, since the first guide rail Gd hardly deforms, the linearity in the movement of the movable platen 112 to which the movable mold 116 is fixed is hardly hindered, and a desired distance between the fixed mold 115 and the movable mold 116 is obtained. The influence on the formation of the cavity space can be reduced.

  While mold clamping is being performed, the resin melted in the injection apparatus 117 is injected from the injection nozzle 118 and filled into the cavity space of the mold apparatus 119.

  When the resin in the cavity space is solidified, the current supply to the coil 148 is stopped in the state shown in FIG. In this case, even if the current supply to the coil 148 is stopped, the magnetism remains in the attracting portion 151, so that the current is supplied in the opposite direction to the case where the coil 148 is clamped and remains in the attracting portion 151. The magnetism is removed. Subsequently, a current in the reverse direction is supplied to the coil 135. Thereby, the linear motor 128 is driven, the movable platen 112 is moved backward, the movable mold 116 is moved to the backward limit position, and the mold opening is performed.

  Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the specific embodiment, and various modifications and changes are within the scope of the gist of the present invention described in the claims. It can be changed.

It is a figure which shows schematic structure of the mold clamping apparatus using the adsorption | suction force of an electromagnet for the operation | movement of mold clamping. It is a figure which shows the problem of the mold clamping apparatus shown in FIG. It is a figure which shows schematic structure of the mold clamping apparatus concerning the 1st Embodiment of this invention. It is a figure which shows the arrangement | positioning structure of the 1st guide rail of the mold clamping apparatus concerning the 1st Embodiment of this invention, and a 2nd guide rail. It is a figure which shows the arrangement structure of the 1st guide rail and 2nd guide rail of the mold clamping apparatus concerning the 2nd Embodiment of this invention. It is a figure which shows the 1st modification of the arrangement structure of the 1st guide rail of the mold clamping apparatus concerning the 2nd Embodiment of this invention, and a 2nd guide rail. It is a figure which shows the 2nd modification of the arrangement | positioning structure of the 1st guide rail of the mold clamping apparatus concerning the 2nd Embodiment of this invention, and a 2nd guide rail. It is a figure which shows the arrangement | positioning structure of the 1st guide rail and 2nd guide rail of the mold clamping apparatus concerning the 3rd Embodiment of this invention. It is a figure which shows the modification of the arrangement | positioning structure of the 1st guide rail of the mold clamping apparatus concerning the 3rd Embodiment of this invention, and a 2nd guide rail.

Explanation of symbols

100 mold clamping device 111 fixed platen 112 movable platen 113 rear platen 122 suction plate 128 linear motor 129 stator 131 mover 139 rod Bl positioning block Fr support frame Gb guide base Gd1 first guide rail Gd2 second guide rail Op opening Part Sb Slide base

Claims (11)

A movable platen that is provided opposite to the fixed platen and moves forward and backward;
A mover of a linear motor for moving the movable platen back and forth;
A first guide rail for guiding advancement and retraction of the movable platen;
A mold clamping device comprising: a second guide rail provided separately from the first guide rail for guiding advancement and retraction of the mover of the linear motor. The mold clamping device according to claim 1,
The mold clamping device, wherein the first guide rail and the second guide rail are provided on a support frame that supports the mold clamping device. The mold clamping device according to claim 2,
The mold clamping apparatus, wherein the first guide rail and the second guide rail are provided on the same surface of the support frame. The mold clamping device according to claim 3, wherein
The mold clamping device, wherein the first guide rail and the second guide rail extend in the same direction and are spaced apart by a predetermined length in the extending direction. The mold clamping device according to claim 4, wherein
A mold clamping device, wherein the positioning block determines straightness of each of the first guide rail and the second guide rail. The mold clamping device according to claim 3, wherein
The mold clamping apparatus, wherein the first guide rail and the second guide rail are arranged side by side so as to partially overlap each other. The mold clamping device according to claim 6, wherein
The mold clamping apparatus, wherein the second guide rail is provided outside the first guide rail. The mold clamping device according to claim 6 or 7,
A positioning block is provided on the frame in contact with the mutually opposing surfaces of the first guide rail and the second guide rail provided adjacent to each other. Clamping device. The mold clamping device according to claim 8, wherein
A single positioning block is provided on the frame in contact with the surfaces of the first guide rail and the second guide rail which are provided adjacent to each other on the sides facing each other. A mold clamping device characterized by that. The mold clamping device according to claim 6 or 7,
A positioning block is provided on the frame in contact with the opposite surface of the first guide rail and the second guide rail provided adjacent to each other. A mold clamping device. The mold clamping device according to claim 2,
The mold clamping apparatus according to claim 1, wherein the support frame is disposed at different heights where the first guide rail and the second guide rail are provided.

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