TW201313438A

TW201313438A - Injection molding machine

Info

Publication number: TW201313438A
Application number: TW101124917A
Authority: TW
Inventors: Atsuro Tamura; Tomohiro Moriya; Tatsuya Shibata
Original assignee: Sumitomo Heavy Industries
Priority date: 2011-09-20
Filing date: 2012-07-11
Publication date: 2013-04-01
Also published as: KR20130031217A; KR101327253B1; JP2013067025A; CN103009546B; CN103009546A; JP5749127B2

Abstract

The invention provides an injection molding machine, which can prevent inclination of a member laterally absorbed by an electromagnet and prevent magnetic leakage dispersed from the member laterally absorbed by the electromagnet toward a central rod. The injection molding machine of the invention is characterized to contain a first fixing member, a second fixing member, a first movable member and a second movable member, in which the first fixing member is installed with a fixing mold, the second fixing member arranged opposite to the first fixing member is penetrated by the central rod. The first movable member installed with a movable mold, and the second movable member linked to the first movable member via the central rod is moved together with the first movable member. The second fixing member and the second movable member constitute a mold clamping force generation mechanism to generate the clamping force on the basis of the adsorption force of the electromagnet. The second movable member has a penetration hole passed through with the central rod, and the penetration hole has a peripheral wall defined with a contact part which is contacted with the central rod and a non-contact part which is separated from the central rod.

Description

射出成形機 Injection molding machine

本發明係有關一種具備驅動合模動作之電磁鐵之射出成形機。 The present invention relates to an injection molding machine including an electromagnet that drives a mold clamping operation.

以往，在射出成形機中，從射出裝置的射出噴嘴射出樹脂並填充於定模與動模之間的模穴空間，並使其固化來得到成形品。而且，為了相對於定模移動動模來進行閉模、合模及開模而配設合模裝置。 Conventionally, in an injection molding machine, a resin is injected from an injection nozzle of an injection device and filled in a cavity space between a fixed mold and a movable mold, and is solidified to obtain a molded article. Further, a mold clamping device is disposed in order to perform mold closing, mold clamping, and mold opening by moving the movable mold with respect to the fixed mold.

該合模裝置包含：藉由向液壓缸供給油來驅動之液壓式合模裝置及藉由電動機驅動之電動式合模裝置，該電動式合模裝置可控性較高，不會污染周邊，且能量效率較高，因此被廣泛利用。此時，藉由驅動電動機使滾珠螺桿旋轉來產生推力，藉由肘節機構放大該推力而產生較大之合模力。 The mold clamping device comprises: a hydraulic mold clamping device driven by supplying oil to a hydraulic cylinder and an electric mold clamping device driven by an electric motor, wherein the electric mold clamping device has high controllability and does not pollute the periphery. And energy efficiency is high, so it is widely used. At this time, the thrust is generated by driving the motor to rotate the ball screw, and the thrust is amplified by the toggle mechanism to generate a large clamping force.

但是，在這種結構的電動式合模裝置中，由於使用肘節機構，因此在該肘節機構的特性上很難變更合模力，響應性及穩定性較差，無法在成形中控制合模力。於是，能夠將藉由滾珠螺桿產生之推力直接用作合模力之合模裝置被提出。此時，電動機的轉矩與合模力成比例，因此能夠在成形中控制合模力。 However, in the electric mold clamping device of such a configuration, since the toggle mechanism is used, it is difficult to change the mold clamping force in the characteristics of the toggle mechanism, and the responsiveness and stability are poor, and the mold clamping cannot be controlled in the forming. force. Thus, a clamping device capable of directly using the thrust generated by the ball screw as a mold clamping force can be proposed. At this time, the torque of the motor is proportional to the mold clamping force, so that the mold clamping force can be controlled during the forming.

然而，在習知之合模裝置中，滾珠螺桿的耐荷重性較低，不僅無法產生較大之合模力，而且合模力會因產生於電動機之轉矩脈動而變動。並且，為了產生合模力，需要始終向電動機供給電流，電動機的耗電量及發熱量增多，因此需要將電動機的額定輸出加大其相應量，導致合模裝置的成本增高。 However, in the conventional clamping device, the ball screw has low load resistance, and not only does not produce a large clamping force, but also the clamping force is generated. The torque of the motor fluctuates and changes. Further, in order to generate the mold clamping force, it is necessary to always supply a current to the motor, and the power consumption and heat generation amount of the motor increase. Therefore, it is necessary to increase the rated output of the motor by a corresponding amount, resulting in an increase in the cost of the mold clamping device.

因此，針對模開閉動作使用線性馬達而針對合模動作利用電磁鐵的吸附力之合模裝置被提出(例如，專利文獻1)。 Therefore, a mold clamping device that uses an adsorption force of an electromagnet for a mold clamping operation using a linear motor for a mold opening and closing operation has been proposed (for example, Patent Document 1).

(先前技術文獻) (previous technical literature) (專利文獻) (Patent Literature)

專利文獻1：國際公開第05/090052號小冊子 Patent Document 1: International Publication No. 05/090052

然而，當為如專利文獻1中記載之使用利用電磁鐵的吸附力之合模裝置之結構時，構成利用電磁鐵之合模力產生機構之可動構件為了防止其傾倒需要與中心桿接觸來被支撐。然而，在這種結構中，從可動構件朝向中心桿之磁漏成為問題。 However, when the structure of the mold clamping device using the adsorption force of the electromagnet is used as described in Patent Document 1, the movable member constituting the mold clamping force generating mechanism using the electromagnet needs to be in contact with the center rod in order to prevent it from falling. support. However, in this configuration, magnetic leakage from the movable member toward the center rod becomes a problem.

因此，本發明的目的在於提供一種射出成形機，可防止電磁鐵吸附於側的構件的傾倒，並防止從電磁鐵吸附於側的構件朝向中心桿之磁漏。 Accordingly, an object of the present invention is to provide an injection molding machine which can prevent the pouring of a member on which an electromagnet is attracted to the side and prevent magnetic leakage from a member which is adsorbed on the side of the electromagnet toward the center rod.

為了實現上述目的，根據本發明的一態樣，提供一種射出成形機，其特徵在於，係具備：第1固定構件，安裝有定模；第2固定構件，配設為與前述第1固定構件對置並讓中心桿貫穿；第1可動構件，安裝有動模；及第2可動構件，藉由前述中心桿與前述第1可動構件連結而與前述第1可動構件一同移動，前述第2固定構件與前述第2可動構件構成基於電磁鐵之吸附力產生合模力之合模力產生機構，前述第2可動構件具有讓前述中心桿通過之貫穿孔，該貫穿孔之周壁包含與前述中心桿接觸之接觸部和從前述中心桿分離之非接觸部。 In order to achieve the above object, an injection molding machine according to an aspect of the present invention includes a first fixing member to which a fixed mold is attached, and a second fixing member to be disposed to be the first fixing member. The first movable member is inserted and the movable mold is inserted; and the second movable member is coupled to the first movable member by the center rod and moved together with the first movable member, and the second fixed The member and the second movable member constitute a mold clamping force generating mechanism that generates a mold clamping force based on an adsorption force of the electromagnet, and the second movable member has a through hole through which the center rod passes, and the peripheral wall of the through hole includes the center rod a contact portion that contacts and a non-contact portion that is separated from the center rod.

根據本發明，可得到一種射出成形機，能夠防止電磁鐵吸附側的構件的傾倒，並防止從電磁鐵吸附側的構件朝向中心桿之磁漏。 According to the present invention, it is possible to obtain an injection molding machine capable of preventing the pouring of the member on the adsorption side of the electromagnet and preventing the magnetic leakage from the member on the side of the electromagnet adsorption toward the center rod.

以下，參閱附圖，對用於實施本發明之最佳方式進行說明。另外，本實施方式中，關於合模裝置，將進行閉模時的可動壓板的移動方向設為前方，將進行開模時的可動壓板的移動方向設為後方，關於射出裝置，將進行射出時的螺桿的移動方向設為前方，將進行計量時的螺桿的移動方向設為後方來進行說明。 Hereinafter, the best mode for carrying out the invention will be described with reference to the accompanying drawings. In the present embodiment, the moving direction of the movable platen when the mold is closed is set to the front, and the moving direction of the movable platen when the mold is opened is set to the rear, and the injection device is to be emitted. The moving direction of the screw is set to the front, and the moving direction of the screw at the time of measurement is set to the rear.

第1圖係表示本發明的實施方式的射出成形機中的合模裝置閉模時的狀態之圖，第2圖係表示本發明的實施方式的射出成形機中的合模裝置開模時的狀態之圖。另外，在第1圖及第2圖中，加上陰影線之構件表示主要截面。 1 is a view showing a state in which the mold clamping device in the injection molding machine according to the embodiment of the present invention is closed, and FIG. 2 is a view showing a mold closing device in the injection molding machine according to the embodiment of the present invention. State diagram. In addition, in FIGS. 1 and 2, the hatched member indicates the main cross section.

圖中，10為合模裝置，Fr為射出成形機的框架(架台)，Gd為可相對於該框架Fr移動之導引件，11為載置於未圖示之導引件上或框架Fr上之固定壓板，與該固定壓板11隔著既定間隔且與固定壓板11對置而配設後壓板13，在固定壓板11與後壓板13之間架設4根繫桿14(圖中只示出4根繫桿14中的2根。)。另外，後壓板13相對於框架Fr固定。 In the figure, 10 is a mold clamping device, Fr is a frame (frame) of the injection molding machine, Gd is a guide member movable relative to the frame Fr, and 11 is placed on a guide member (not shown) or a frame Fr The upper fixed platen is disposed with the fixed platen 11 at a predetermined interval from the fixed platen 11, and the rear platen 13 is disposed between the fixed platen 11 and the rear platen 13 (only the figure is shown) 2 of the 4 tie rods 14). Further, the rear platen 13 is fixed with respect to the frame Fr.

繫桿14的前端部(圖中的右端部)形成有螺紋部(未圖示)，將螺母n1螺合緊固於該螺紋部，藉此使繫桿14的前端部固定於固定壓板11。繫桿14的後端部固定於後壓板13。 A distal end portion (right end portion in the drawing) of the tie rod 14 is formed with a threaded portion (not shown), and the nut n1 is screwed and fastened to the screw portion, whereby the distal end portion of the tie rod 14 is fixed to the fixed pressure plate 11. The rear end portion of the tie rod 14 is fixed to the rear pressure plate 13.

而且，沿繫桿14與固定壓板11對置且在模開閉方向進退自如地配設可動壓板12。因此，可動壓板12固定於導引件Gd上，在可動壓板12中與繫桿14對應之部位形成用於使繫桿14貫穿之未圖示之導引孔或缺口部。另外，導引件Gd上還固定有後述的吸附板22。導引件Gd可以如圖所示對於吸附板22與可動壓板12各自分開設置，亦可以由對於吸附板22與可動壓板12為共通的一體物構成。 Further, the movable platen 14 is disposed so as to be opposed to the fixed platen 11 along the tie bar 14 and to be retractable in the mold opening and closing direction. Therefore, the movable platen 12 is fixed to the guide Gd, and a guide hole or a notch portion (not shown) through which the tie bar 14 is inserted is formed in a portion corresponding to the tie bar 14 in the movable platen 12. Further, an adsorption plate 22 to be described later is fixed to the guide Gd. The guiding member Gd may be disposed separately from the adsorption plate 22 and the movable platen 12 as shown in the figure, or may be a unitary structure common to the adsorption plate 22 and the movable platen 12. to make.

而且，在固定壓板11上固定定模15，在可動壓板12上固定動模16，定模15與動模16伴隨可動壓板12的進退而接觸或分離，進行閉模、合模及開模。另外，隨著進行合模，在定模15與動模16之間形成未圖示之模穴空間，從射出裝置17的射出噴嘴18射出之未圖示之樹脂填充於模穴空間。而且，由定模15及動模16構成模具裝置19。 Further, the fixed mold 15 is fixed to the fixed platen 11, and the movable mold 16 is fixed to the movable platen 12. The fixed mold 15 and the movable mold 16 are brought into contact with or separated by the advancement and retreat of the movable platen 12, and the mold closing, mold clamping, and mold opening are performed. Further, as the mold clamping is performed, a cavity space (not shown) is formed between the fixed mold 15 and the movable mold 16, and a resin (not shown) which is emitted from the injection nozzle 18 of the injection device 17 is filled in the cavity space. Further, the mold unit 19 is constituted by the fixed mold 15 and the movable mold 16.

吸附板22與可動壓板12平行地固定於導引件Gd上。藉此，吸附板22在比後壓板13更靠後方進退自如。吸附板22可由磁性材料形成。例如，吸附板22可以由電磁積層鋼板構成，該電磁積層鋼板藉由積層由強磁性體構成之薄板而形成。或者，吸附板22可以藉由鑄造來形成。 The suction plate 22 is fixed to the guide Gd in parallel with the movable platen 12. Thereby, the suction plate 22 can move forward and backward more than the rear pressure plate 13. The adsorption plate 22 may be formed of a magnetic material. For example, the adsorption plate 22 may be composed of an electromagnetic laminated steel plate formed by laminating a thin plate made of a ferromagnetic material. Alternatively, the adsorption plate 22 can be formed by casting.

線性馬達28為了使可動壓板12進退而設置於導引件Gd上。線性馬達28具備定子29和可動件31，定子29形成為在框架Fr上與導引件Gd平行且與可動壓板12的移動範圍對應，可動件31形成為在可動壓板12的下端與定子29對置且遍及既定範圍。 The linear motor 28 is provided on the guide Gd in order to advance and retract the movable platen 12. The linear motor 28 is provided with a stator 29 formed in parallel with the guide Gd on the frame Fr and corresponding to the moving range of the movable platen 12, and the movable member 31 is formed at the lower end of the movable platen 12 and the stator 29 And throughout the established range.

可動件31具備磁心34及線圈35。而且，磁心34具備朝向定子29突出且以既定間距形成之複數個磁極齒33，線圈35捲繞於各磁極齒33。另外，在相對於可動壓板12的移動方向垂直之方向上磁極齒33形成為相互平行。而且，定子29具備未圖示之磁心及在該磁心上延伸而形成之未圖示之永久磁鐵。該永久磁鐵藉由使N極及S極的各磁極交替磁化來形成。藉由向線圈35供給既定電流來驅動線性馬達28，使可動件31進退，隨此，藉由導引件Gd使可動壓板12進退，而能夠進行閉模及開模。 The mover 31 includes a core 34 and a coil 35. Further, the core 34 includes a plurality of magnetic pole teeth 33 that protrude toward the stator 29 and are formed at a predetermined pitch, and the coil 35 is wound around each of the magnetic pole teeth 33. Further, the magnetic pole teeth 33 are formed to be parallel to each other in a direction perpendicular to the moving direction of the movable platen 12. Further, the stator 29 includes a core (not shown) and a permanent magnet (not shown) which is formed to extend on the core. The permanent magnet is made by making the N pole and the S pole Each of the magnetic poles is alternately magnetized to form. The linear motor 28 is driven by supplying a predetermined current to the coil 35, and the movable member 31 is moved forward and backward. Accordingly, the movable platen 12 is advanced and retracted by the guide Gd, whereby mold closing and mold opening can be performed.

另外，在本實施方式中，將永久磁鐵配設於定子29上，將線圈35配設於可動件31上，但亦能夠將線圈配設於定子上，將永久磁鐵配設於可動件上。此時，線圈不會隨著線性馬達28的驅動而移動，因此能夠輕鬆地進行用於向線圈供給電力之配線。 Further, in the present embodiment, the permanent magnet is disposed on the stator 29, and the coil 35 is disposed on the movable member 31. However, the coil may be disposed on the stator and the permanent magnet may be disposed on the movable member. At this time, since the coil does not move with the driving of the linear motor 28, the wiring for supplying electric power to the coil can be easily performed.

另外，不限於在導引件Gd上固定可動壓板12和吸附板22之結構，亦可設為將線性馬達28的可動件31設置於可動壓板12或吸附板22上之結構。而且，作為模開閉機構不限於線性馬達28，亦可為液壓式或電動式等。 Further, the configuration is not limited to the configuration in which the movable platen 12 and the suction plate 22 are fixed to the guide Gd, and the movable member 31 of the linear motor 28 may be disposed on the movable platen 12 or the suction plate 22. Further, the mold opening and closing mechanism is not limited to the linear motor 28, and may be hydraulic or electric.

若可動壓板12前進而使動模16與定模15抵接，則進行閉模，接著，進行合模。在後壓板13與吸附板22之間配設用於進行合模之電磁鐵單元37。並且，進退自如地配設貫穿後壓板13及吸附板22而延伸且連結可動壓板12和吸附板22之中心桿39。該中心桿39在閉模時及開模時與可動壓板12的進退連動而使吸附板22進退，而在合模時將藉由電磁鐵單元37產生之吸附力傳遞至可動壓板12。 When the movable platen 12 advances and the movable mold 16 comes into contact with the fixed mold 15, the mold is closed, and then the mold clamping is performed. An electromagnet unit 37 for performing mold clamping is disposed between the rear platen 13 and the suction plate 22. Further, the center rod 39 that extends through the rear platen 13 and the suction plate 22 and that connects the movable platen 12 and the suction plate 22 is disposed to be movable forward and backward. The center rod 39 moves the suction plate 22 forward and backward in conjunction with the advancement and retraction of the movable platen 12 at the time of mold closing and mold opening, and transmits the suction force generated by the electromagnet unit 37 to the movable platen 12 at the time of mold clamping.

另外，由固定壓板11、可動壓板12、後壓板13、吸附板22、線性馬達28、電磁鐵單元37及中心桿39等構成合模裝置10。 Further, the mold clamping device 10 is constituted by the fixed platen 11, the movable platen 12, the rear platen 13, the suction plate 22, the linear motor 28, the electromagnet unit 37, the center rod 39, and the like.

電磁鐵單元37包括形成於後壓板13側之電磁鐵49 、及形成於吸附板22側之吸附部51。而且，後壓板13的後端面的既定部分、本實施方式中為在中心桿39周圍形成槽45，在比槽45更靠內側形成磁心46，而且在比槽45更靠外側形成磁軛47。並且，在槽45內繞著磁心46捲繞線圈48。另外，磁心46及磁軛47可由鑄件的一體結構構成，亦可為藉由積層強磁性體構成之薄板來形成之電磁積層鋼板。 The electromagnet unit 37 includes an electromagnet 49 formed on the side of the rear platen 13 And the adsorption portion 51 formed on the side of the adsorption plate 22. Further, in a predetermined portion of the rear end surface of the rear platen 13, in the present embodiment, a groove 45 is formed around the center rod 39, a core 46 is formed inside the groove 45, and a yoke 47 is formed outside the groove 45. Further, the coil 48 is wound around the core 46 in the groove 45. Further, the core 46 and the yoke 47 may be formed of an integral structure of a casting, or may be an electromagnetic laminated steel sheet formed by laminating a thin plate made of a ferromagnetic material.

另外，在本實施方式中，可與後壓板13分開形成電磁鐵49，與吸附板22分開形成吸附部51，亦可以將電磁鐵作為後壓板13的一部分形成，並將吸附部作為吸附板22的一部分形成。並且，亦可相反配置電磁鐵與吸附部。例如，可在吸附板22側設置電磁鐵49，在後壓板13側設置吸附部。 Further, in the present embodiment, the electromagnet 49 may be formed separately from the rear platen 13, and the adsorption portion 51 may be formed separately from the adsorption plate 22, or the electromagnet may be formed as a part of the rear platen 13, and the adsorption portion may be used as the adsorption plate 22. Part of the formation. Further, the electromagnet and the adsorption portion may be arranged in reverse. For example, the electromagnet 49 may be provided on the side of the adsorption plate 22, and the adsorption portion may be provided on the side of the rear platen 13.

在電磁鐵單元37中，若向線圈48供給電流，則電磁鐵49被驅動而對吸附部51進行吸附，藉此產生合模力。 When the current is supplied to the coil 48 in the electromagnet unit 37, the electromagnet 49 is driven to adsorb the adsorption portion 51, thereby generating a mold clamping force.

中心桿39配設成在後端部與吸附板22連結且在前端部與可動壓板12連結。因此，中心桿39在閉模時與可動壓板12一同前進而使吸附板22前進，在開模時與可動壓板12一同後退而使吸附板22後退。因此，在後壓板13的中央部分形成用於使中心桿39貫穿之孔41。 The center rod 39 is disposed to be coupled to the suction plate 22 at the rear end portion and coupled to the movable platen 12 at the front end portion. Therefore, the center rod 39 advances together with the movable platen 12 at the time of mold closing to advance the suction plate 22, and retreats together with the movable platen 12 at the time of mold opening to retract the suction plate 22. Therefore, a hole 41 through which the center rod 39 is inserted is formed in the central portion of the rear platen 13.

藉由控制部60控制合模裝置10的線性馬達28及電磁鐵49的驅動。控制部60具備CPU及記憶體等，還具備用於根據由CPU運算出之結果向線性馬達28的線圈35及電磁鐵49的線圈48供給電流之電路。控制部60上還連接荷重檢測器55。荷重檢測器55在合模裝置10中設置於至少1根繫桿14的既定位置(固定壓板11與後壓板13之間的既定位置)，檢測施加於該繫桿14之荷重。圖中示有在上下2根繫桿14上設置荷重檢測器55之例子。荷重檢測器55例如由檢測繫桿14的延伸量之感測器構成。藉由荷重檢測器55檢測出之荷重(應變)被送至控制部60。控制部60根據荷重檢測器55的輸出檢測合模力。另外，為了方便起見在第2圖中省略控制部60。 The drive of the linear motor 28 and the electromagnet 49 of the mold clamping device 10 is controlled by the control unit 60. The control unit 60 includes a CPU, a memory, and the like, and further includes a circuit for supplying a current to the coils 35 of the linear motor 28 and the coils 48 of the electromagnets 49 based on the results calculated by the CPU. The control unit 60 also The load detector 55 is connected. The load detector 55 is provided at a predetermined position (a predetermined position between the fixed platen 11 and the rear platen 13) of at least one tie rod 14 in the mold clamping device 10, and detects the load applied to the tie bar 14. An example in which the load detector 55 is provided on the upper and lower tie bars 14 is shown. The load detector 55 is constituted by, for example, a sensor that detects the amount of extension of the tie rod 14. The load (strain) detected by the load detector 55 is sent to the control unit 60. The control unit 60 detects the mold clamping force based on the output of the load detector 55. Further, the control unit 60 is omitted in Fig. 2 for the sake of convenience.

接著，對合模裝置10的動作進行說明。 Next, the operation of the mold clamping device 10 will be described.

藉由控制部60的模開閉處理部61控制閉模製程。在第2圖的狀態(開模時的狀態)下，模開閉處理部61向線圈35供給電流。接著，線性馬達28被驅動而使可動壓板12前進，如第1圖所示，動模16與定模15抵接。此時，在後壓板13與吸附板22之間，亦即電磁鐵49與吸附部51之間形成間隙δ。另外，與合模力相比，閉模所需之力非常小。 The mold closing process is controlled by the mold opening and closing processing unit 61 of the control unit 60. In the state of FIG. 2 (the state at the time of mold opening), the die opening/closing processing unit 61 supplies a current to the coil 35. Next, the linear motor 28 is driven to advance the movable platen 12. As shown in Fig. 1, the movable mold 16 abuts against the fixed mold 15. At this time, a gap δ is formed between the rear platen 13 and the adsorption plate 22, that is, between the electromagnet 49 and the adsorption portion 51. In addition, the force required to close the mold is very small compared to the mold clamping force.

接著，控制部60的合模處理部62控制合模製程。合模處理部62向線圈48供給電流，藉由電磁鐵49的吸附力對吸附部51進行吸附。隨此，合模力透過吸附板22及中心桿39傳遞至可動壓板12，並進行合模。開始合模時等的合模力發生變化時，合模處理部62進行控制，將為了產生應藉由該變化而得到之目標合模力、亦即穩定狀態下之目標合模力所需之穩定電流值供給至線圈48。 Next, the mold clamping processing unit 62 of the control unit 60 controls the mold clamping process. The mold clamping unit 62 supplies a current to the coil 48, and adsorbs the adsorption unit 51 by the adsorption force of the electromagnet 49. Accordingly, the mold clamping force is transmitted to the movable platen 12 through the suction plate 22 and the center rod 39, and the mold clamping is performed. When the mold clamping force at the time of starting the mold clamping is changed, the mold clamping processing unit 62 performs control to generate the target mold clamping force to be obtained by the change, that is, the target mold clamping force in the steady state. The steady current value is supplied to the coil 48.

另外，合模力藉由荷重檢測器55檢測。檢測出之合模力被送至控制部60，在控制部60中，為了使合模力成為設定值係調整供給至線圈48之電流，並進行反饋控制。在此期間，在射出裝置17中熔融之樹脂從射出噴嘴18射出並填充於模具裝置19的模穴空間。 In addition, the mold clamping force is detected by the load detector 55. Detected The mold force is sent to the control unit 60, and the control unit 60 adjusts the current supplied to the coil 48 so that the mold clamping force becomes the set value, and performs feedback control. During this period, the resin melted in the injection device 17 is ejected from the injection nozzle 18 and filled in the cavity space of the mold device 19.

若模穴空間內的樹脂冷卻並固化，則模開閉處理部61控制開模製程。在第1圖的狀態下，合模處理部62停止向線圈48供給電流。隨此，線性馬達28被驅動而使可動壓板12後退，如第2圖所示，使動模16位於後退極限位置而進行開模。 When the resin in the cavity space is cooled and solidified, the mold opening and closing processing portion 61 controls the mold opening process. In the state of Fig. 1, the mold clamping processing unit 62 stops supplying current to the coil 48. Accordingly, the linear motor 28 is driven to retract the movable platen 12. As shown in Fig. 2, the movable mold 16 is placed at the retreat limit position to perform mold opening.

在此，參考第3圖及以後的圖，對本發明的特徵構造進行說明。 Here, the characteristic structure of the present invention will be described with reference to Fig. 3 and subsequent drawings.

第3圖係表示吸附板22與中心桿39的關係之截面圖，相當於第1圖的Y部的詳細內容。 Fig. 3 is a cross-sectional view showing the relationship between the suction plate 22 and the center rod 39, and corresponds to the details of the Y portion of Fig. 1 .

另外，第3圖所示之例子中，吸附板22的背後緊固有模厚調整機構44的螺母按壓構件44b。螺母按壓構件44b是用來保持與形成於中心桿39的周面上之螺紋39a嚙合之螺母44a。模厚調整機構44為對應於模具裝置19的厚度而調整可動壓板12與吸附板22的相對位置(亦即該等之間的距離)之機構。例如，模厚調整機構44，藉由未圖示之模厚調整用馬達使結合於螺母44a之齒輪44c旋轉，從而可改變中心桿39相對於吸附板22之位置。藉此，調整中心桿39相對於吸附板22之位置，並調整可動壓板12相對於固定壓板11之位置。亦即，藉由改變可動壓板12與吸附板22的相對位置來進行模厚調整。 Further, in the example shown in Fig. 3, the nut pressing member 44b of the mold thickness adjusting mechanism 44 is fastened to the back of the suction plate 22. The nut pressing member 44b is a nut 44a for holding the thread 39a formed on the circumferential surface of the center rod 39. The mold thickness adjusting mechanism 44 is a mechanism that adjusts the relative position (i.e., the distance between the movable platen 12) and the suction plate 22 corresponding to the thickness of the mold device 19. For example, the mold thickness adjusting mechanism 44 rotates the gear 44c coupled to the nut 44a by a mold thickness adjusting motor (not shown), thereby changing the position of the center rod 39 with respect to the suction plate 22. Thereby, the position of the center rod 39 with respect to the suction plate 22 is adjusted, and the position of the movable platen 12 with respect to the fixed platen 11 is adjusted. That is, the mold thickness adjustment is performed by changing the relative position of the movable platen 12 and the suction plate 22.

吸附板22具有讓中心桿39通過之貫穿孔90。如第3圖所示，貫穿孔90的周壁包含與中心桿39接觸之接觸部22a和從中心桿39分離之非接觸部22b。接觸部22a及非接觸部22b可以使貫穿孔90的周壁呈段差狀的形態而形成。亦即，非接觸部22b可以由形成於貫穿孔90的周壁之段差(凹部)構成。又非接觸部22b可藉由將貫穿孔90的周壁切除一部分而形成。亦即，非接觸部22b可以由將貫穿孔90的直徑擴大之缺口形成。 The suction plate 22 has a through hole 90 through which the center rod 39 passes. As shown in Fig. 3, the peripheral wall of the through hole 90 includes a contact portion 22a that is in contact with the center rod 39 and a non-contact portion 22b that is separated from the center rod 39. The contact portion 22a and the non-contact portion 22b can be formed in a form in which the peripheral wall of the through hole 90 is in a stepped shape. That is, the non-contact portion 22b can be constituted by a step (concave portion) formed in the peripheral wall of the through hole 90. Further, the non-contact portion 22b can be formed by cutting a part of the peripheral wall of the through hole 90. That is, the non-contact portion 22b may be formed by a notch that enlarges the diameter of the through hole 90.

接觸部22a可在中心桿39的圓周方向上遍及整周而設置，亦可以離散地設置。而且，同樣地，非接觸部22b可以在中心桿39的圓周方向上遍及整周而設置，亦可以離散地設置。並且，接觸部22a與非接觸部22b在中心桿39的軸向上的位置是任意的。在圖示的例子中，接觸部22a設置於後壓板13側，非接觸部22b設置於模厚調整機構44側，但可以為相反。亦即，非接觸部22b可設置於後壓板13側，接觸部22a可設置於模厚調整機構44側。而且，可在中心桿39的圓周方向上設置多處接觸部22a，同樣地，可在中心桿39的圓周方向上設置多處非接觸部22b。 The contact portion 22a may be provided over the entire circumference in the circumferential direction of the center rod 39, or may be discretely disposed. Further, similarly, the non-contact portion 22b may be provided over the entire circumference in the circumferential direction of the center rod 39, or may be discretely provided. Further, the position of the contact portion 22a and the non-contact portion 22b in the axial direction of the center rod 39 is arbitrary. In the illustrated example, the contact portion 22a is provided on the rear pressure plate 13 side, and the non-contact portion 22b is provided on the mold thickness adjustment mechanism 44 side, but may be reversed. That is, the non-contact portion 22b may be disposed on the side of the rear platen 13, and the contact portion 22a may be disposed on the side of the mold thickness adjusting mechanism 44. Further, a plurality of contact portions 22a may be provided in the circumferential direction of the center rod 39, and similarly, a plurality of non-contact portions 22b may be provided in the circumferential direction of the center rod 39.

如此，根據本實施例，吸附板22相對於中心桿39以接觸部22a接觸而被支撐。因此，能夠適當地防止吸附板22的傾倒。另一方面，吸附板22相對於中心桿39僅以接觸部22a接觸而被支撐，藉由非接觸部22b從中心桿39分離。亦即，吸附板22中並非貫穿孔90的整個周壁與中心桿39接觸，而是貫穿孔90的周壁中只有形成接觸部22a之部分與中心桿39接觸。藉此，能夠減少吸附板22與中心桿39之間的接觸面積，並能夠降低電磁鐵單元37動作時可能產生之從吸附板22朝向中心桿39之磁漏。 As such, according to the present embodiment, the suction plate 22 is supported by the contact portion 22a with respect to the center rod 39. Therefore, the pouring of the suction plate 22 can be appropriately prevented. On the other hand, the suction plate 22 is supported by the contact portion 22a with respect to the center rod 39, and is separated from the center rod 39 by the non-contact portion 22b. That is, the entire peripheral wall of the through hole 90 is not in the adsorption plate 22. In contact with the center rod 39, only the portion of the peripheral wall of the through hole 90 where the contact portion 22a is formed is in contact with the center rod 39. Thereby, the contact area between the suction plate 22 and the center rod 39 can be reduced, and the magnetic leakage from the adsorption plate 22 toward the center rod 39 which may occur during the operation of the electromagnet unit 37 can be reduced.

另外，上述實施例中，申請專利範圍中的“第1固定構件”對應固定壓板11，申請專利範圍中的“第1可動構件”對應可動壓板12。而且，申請專利範圍中的“第2固定構件”對應後壓板13，申請專利範圍中的“第2可動構件”對應吸附板22。 Further, in the above embodiment, the "first fixing member" in the patent application corresponds to the fixed platen 11, and the "first movable member" in the patent application corresponds to the movable platen 12. Further, the "second fixing member" in the patent application scope corresponds to the rear pressing plate 13, and the "second movable member" in the patent application scope corresponds to the adsorption plate 22.

以上，對本發明的較佳實施例進行了詳細說明，但本發明不限於上述實施例，在不脫離本發明的範圍內能夠對上述的實施例做各種變形及置換。 The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described above, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the invention.

例如，上述中，例示了特定結構的合模裝置10，但合模裝置10可以為利用電磁鐵進行合模之任意結構。另外，合模裝置10可以為除利用電磁鐵進行合模之裝置以外的結構，例如肘節式結構。 For example, in the above description, the mold clamping device 10 of a specific configuration is exemplified, but the mold clamping device 10 may be of any configuration that is closed by an electromagnet. Further, the mold clamping device 10 may be of a structure other than a device that performs mold clamping by an electromagnet, such as a toggle structure.

Fr‧‧‧框架 Fr‧‧ frame

Gd‧‧‧導引件 Gd‧‧‧Guide

10‧‧‧合模裝置 10‧‧‧Molding device

11‧‧‧固定壓板 11‧‧‧Fixed platen

12‧‧‧可動壓板 12‧‧‧ movable platen

13‧‧‧後壓板 13‧‧‧ rear platen

14‧‧‧繫桿 14‧‧‧ tied

15‧‧‧定模 15‧‧ ‧ fixed mode

16‧‧‧動模 16‧‧‧moving

17‧‧‧射出裝置 17‧‧‧Injection device

18‧‧‧射出噴嘴 18‧‧‧Injection nozzle

19‧‧‧模具裝置 19‧‧‧Molding device

22‧‧‧吸附板 22‧‧‧Adsorption plate

22a‧‧‧接觸部 22a‧‧‧Contacts

22b‧‧‧非接觸部 22b‧‧‧ Non-contact department

28‧‧‧線性馬達 28‧‧‧Linear motor

29‧‧‧定子 29‧‧‧ Stator

31‧‧‧可動件 31‧‧‧ movable parts

33‧‧‧磁極齒 33‧‧‧Magnetic teeth

34‧‧‧磁心 34‧‧‧Magnetic core

35‧‧‧線圈 35‧‧‧ coil

37‧‧‧電磁鐵單元 37‧‧‧Electromagnetic unit

39‧‧‧中心桿 39‧‧‧ center pole

41‧‧‧孔 41‧‧‧ hole

44‧‧‧模厚調整機構 44‧‧‧Mold thickness adjustment mechanism

45‧‧‧槽 45‧‧‧ slots

46‧‧‧磁心 46‧‧‧Magnetic core

47‧‧‧磁軛 47‧‧‧Y yoke

48‧‧‧線圈 48‧‧‧ coil

49‧‧‧電磁鐵 49‧‧‧Electromagnet

51‧‧‧吸附部 51‧‧‧Adsorption Department

55‧‧‧荷重檢測器 55‧‧‧Load detector

60‧‧‧控制部 60‧‧‧Control Department

61‧‧‧模開閉處理部 61‧‧‧Mold opening and closing processing department

62‧‧‧合模處理部 62‧‧‧Molding Processing Department

90‧‧‧貫穿孔 90‧‧‧through holes

第1圖係表示本發明的實施方式的射出成形機中的合模裝置閉模時的狀態之圖。 Fig. 1 is a view showing a state in which the mold clamping device in the injection molding machine according to the embodiment of the present invention is closed.

第2圖係表示本發明的實施方式的射出成形機中的合模裝置開模時的狀態之圖。 Fig. 2 is a view showing a state at the time of mold opening of the mold clamping device in the injection molding machine according to the embodiment of the present invention.

第3圖係表示吸附板22與中心桿39的關係之截面圖。 Figure 3 is a cross section showing the relationship between the adsorption plate 22 and the center rod 39. Figure.

44‧‧‧模厚調整機構 44‧‧‧Mold thickness adjustment mechanism

44a‧‧‧螺母 44a‧‧‧Nuts

44b‧‧‧螺母按壓構件 44b‧‧‧Nut pressing member

22‧‧‧吸附板 22‧‧‧Adsorption plate

22b‧‧‧非接觸部 22b‧‧‧ Non-contact department

22a‧‧‧接觸部 22a‧‧‧Contacts

90‧‧‧貫穿孔 90‧‧‧through holes

39‧‧‧中心桿 39‧‧‧ center pole

44c‧‧‧齒輪 44c‧‧‧ gear

Claims

一種射出成形機，其特徵在於，係具備：第1固定構件，安裝有定模；第2固定構件，配設為與前述第1固定構件對置並讓中心桿貫穿；第1可動構件，安裝有動模；及第2可動構件，藉由前述中心桿與前述第1可動構件連結而與前述第1可動構件一同移動，前述第2固定構件與前述第2可動構件構成基於電磁鐵之吸附力產生合模力之合模力產生機構，前述第2可動構件具有讓前述中心桿通過之貫穿孔，該貫穿孔之周壁包含與前述中心桿接觸之接觸部和從前述中心桿分離之非接觸部。 An injection molding machine comprising: a first fixing member to which a fixed mold is attached; a second fixing member disposed to face the first fixing member and to allow a center rod to penetrate; and a first movable member to be mounted The movable mold and the second movable member are coupled to the first movable member by being coupled to the first movable member, and the second fixed member and the second movable member constitute an adsorption force based on the electromagnet a mold clamping force generating mechanism that generates a mold clamping force, wherein the second movable member has a through hole through which the center rod passes, and a peripheral wall of the through hole includes a contact portion that contacts the center rod and a non-contact portion that is separated from the center rod .

如申請專利範圍第1項所述之射出成形機，其中，前述接觸部及前述非接觸部，是使前述第2可動構件中的前述貫穿孔的周壁呈段差狀的形態而形成。 The injection molding machine according to the first aspect of the invention, wherein the contact portion and the non-contact portion are formed such that a peripheral wall of the through hole in the second movable member is in a stepped shape.

如申請專利範圍第1項所述之射出成形機，其中，前述非接觸部，是藉由將前述第2可動構件中的前述貫穿孔的周壁切除一部分而形成。 The injection molding machine according to the first aspect of the invention, wherein the non-contact portion is formed by cutting a part of a peripheral wall of the through hole in the second movable member.

如申請專利範圍第1~3項中任一項所述之射出成形機，其中，進一步包含模具壓力調整機構，其調整在前述中心桿的軸向上前述中心桿與前述第2可動構件之間的相對位置。 The injection molding machine according to any one of claims 1 to 3, further comprising a mold pressure adjusting mechanism adjusted to the center rod The relative position between the center rod and the second movable member in the axial direction.