TW201941907A - Method for adjusting ejection rod of injection molding machine wherein the injection molding machine includes a movable platen and an ejection rod - Google Patents

Abstract

The present invention provides a method for adjusting an ejection rod of an injection molding machine capable of preventing partial contact of the ejection rod to achieve uniformity of ejection force of a molded article. In the method for adjusting an ejection rod of an injection molding machine according to the present invention, the injection molding machine (10) includes a movable platen (120) for mounting a mold, and an ejection rod (230) disposed in a through hole of the movable platen (120) in such a manner that it can freely move forward and backward, and a molded object is ejected from the mold so that the front end surface (233) of the ejection rod (230) follows the mold mounting surface (121) of the movable platen (120).

Description

射出成形機的頂出桿調整方法Adjustment method of ejector rod of injection molding machine

本申請主張基於2018年3月30日申請之日本專利申請第2018-067177號的優先權。該日本申請的全部內容藉由參閱援用於本說明書中。
本發明是關於一種射出成形機的頂出桿調整方法。This application claims priority based on Japanese Patent Application No. 2018-067177 filed on March 30, 2018. The entire contents of this Japanese application are incorporated herein by reference.
The invention relates to a method for adjusting the ejector rod of an injection molding machine.

射出成形機中，頂出桿進退自如地配設於供安裝活動模之活動壓板之貫通孔。頂出桿推壓頂出板使固定於頂出板之頂出銷的前端從活動模之模具面突出既定量，藉此於開模之狀態下取出附著於活動模之模具面的成形品（例如參閱專利文獻1）。
（先前技術文獻）
（專利文獻）
專利文獻1：日本特開2004-237640號公報In the injection molding machine, the ejector rod is freely arranged in the through hole of the movable platen for installing the movable mold. The ejector lever pushes the ejector plate so that the front end of the ejector pin fixed to the ejector plate protrudes from the mold surface of the movable mold by a predetermined amount, thereby taking out the molded product attached to the mold surface of the movable mold while the mold is opened (for example, See Patent Document 1).
(Previous technical literature)
(Patent Literature)
Patent Document 1: Japanese Patent Application Laid-Open No. 2004-237640

（發明所欲解決之問題）
頂出桿以懸臂狀態固定於使頂出桿移動之頂出裝置，因此頂出桿之前端面有傾斜之傾向。若於前端面傾斜之狀態下用頂出桿推壓頂出板，則頂出桿對於模具成為局部碰觸，因此成形品頂出力產生偏差，有發生製品不良的疑慮。尤其在壓縮成形時，頂出力的偏差對製品不良之影響非常大。
本發明的目的在於提供一種能夠防止頂出桿之局部碰觸以實現成形品之頂出力的均勻化的射出成形機的頂出桿調整方法。

（解決問題之技術手段）
本發明的實施形態的一觀點之射出成形機的頂出桿調整方法，該射出成形機係具備：壓板，供安裝模具；及頂出桿，進退自如地配設於前述壓板之貫通孔且從前述模具頂出成形品，使前述頂出桿之前端面依循前述壓板的模具安裝面。

（發明之效果）
依本發明，能夠提供一種能夠防止頂出桿之局部碰觸以實現成形品之頂出力的均勻化的射出成形機的頂出桿調整方法。(Problems to be solved by the invention)
The ejector lever is fixed in a cantilever state to an ejector device that moves the ejector lever, so the front end face of the ejector lever tends to tilt. If the ejector plate is pushed with the ejector rod in a state where the front end surface is inclined, the ejector rod will locally touch the mold, so the ejection force of the molded product will be uneven, and there is a possibility that product failure will occur. Especially during compression molding, the deviation of the ejection force has a great influence on the product defect.
An object of the present invention is to provide a method for adjusting an ejector of an injection molding machine capable of preventing a partial contact of the ejector to achieve uniform ejection force of a molded product.

(Technical means to solve problems)
According to an aspect of the embodiment of the present invention, a method for adjusting a ejector rod of an injection molding machine, the injection molding machine includes: a pressure plate for mounting a mold; and an ejector rod that is freely arranged in a through hole of the pressure plate and moves from The mold ejects the molded product, so that the front end surface of the ejector rod follows the mold mounting surface of the pressing plate.

(Effect of the invention)
According to the present invention, it is possible to provide an ejector rod adjustment method of an injection molding machine capable of preventing a partial contact of the ejector rod to achieve uniform ejection force of a molded product.

以下，一邊參閱附圖一邊對實施形態進行說明。為了容易理解，各附圖中對同一構成要件盡可能標註相同的符號以省略說明。
首先，參考圖1及圖2對本實施方式之射出成形機10的整體概略構成進行說明。

（射出成形機）
圖1為表示一實施形態之射出成形機的開模結束時的狀態之圖。圖2為表示一實施形態之射出成形機的合模時的狀態之圖。圖1～圖2中，X方向、Y方向及Z方向為相互垂直的方向。X方向及Y方向表示水平方向，Z方向表示鉛垂方向。合模裝置100為臥式時，X方向為模開閉方向，Y方向為射出成形機10的寬度方向。如圖1～圖2所示，射出成形機10具有合模裝置100、頂出裝置200、射出裝置300、移動裝置400、控制裝置700及框架900。以下，對射出成形機10的各構成要件進行說明。

（合模裝置）
合模裝置100的說明中，以閉模時的活動壓板120的移動方向（圖1及圖2中右方向）為前方，以開模時的活動壓板120的移動方向（圖1及圖2中左方向）為後方來進行說明。
合模裝置100進行模具裝置800的閉模、合模及開模。合模裝置100例如為臥式，模開閉方向為水平方向。合模裝置100具有固定壓板110、活動壓板120、肘節座130、繫桿140、肘節機構150、合模馬達160、運動轉換機構170及模厚調整機構180。
固定壓板110固定於框架900。在固定壓板110的與活動壓板120相對向的面安裝有固定模810。
活動壓板120相對於框架900沿模開閉方向移動自如。框架900上鋪設有引導活動壓板120的引導件101。在活動壓板120的與固定壓板110相對向的面安裝有活動模820。
使活動壓板120相對於固定壓板110進退，藉此進行閉模、合模及開模。由固定模810和活動模820構成模具裝置800。
肘節座130與固定壓板110隔著間隔連結，且沿模開閉方向移動自如地載置於框架900上。另外，肘節座130亦可以沿鋪設於框架900上的引導件移動自如。肘節座130的引導件可以係與活動壓板120的引導件101通用者。
另外，本實施形態中，固定壓板110固定於框架900，肘節座130相對於框架900沿模開閉方向移動自如，但亦可以是肘節座130固定於框架900，固定壓板110相對於框架900沿模開閉方向移動自如。
繫桿140在模開閉方向上隔著間隔L連結固定壓板110與肘節座130。繫桿140可以使用複數根（例如4根）。各繫桿140與模開閉方向平行，且因應合模力而伸展。可以於至少1根繫桿140設置有檢測繫桿140的應變的繫桿應變檢測器141。繫桿應變檢測器141將表示其檢測結果之信號發送至控制裝置700。繫桿應變檢測器141的檢測結果於合模力之檢測等中使用。
另外，本實施形態中，作為檢測合模力之合模力檢測器，使用繫桿應變檢測器141，但本發明並不限定於此。合模力檢測器不限於應變計式，亦可以係壓電式、電容式、油壓式、電磁式等，其安裝位置亦不限定於繫桿140。
肘節機構150配設於活動壓板120與肘節座130之間，且使活動壓板120相對於肘節座130沿模開閉方向移動。肘節機構150由十字頭151、一對連桿群等構成。各連桿群具有藉由銷等連結成屈伸自如的第1連桿152及第2連桿153。第1連桿152用銷等安裝成相對於活動壓板120擺動自如，第2連桿153用銷等安裝成相對於肘節座130擺動自如。第2連桿153透過第3連桿154安裝於十字頭151。若使十字頭151相對於肘節座130進退，則第1連桿152及第2連桿153屈伸，活動壓板120相對於肘節座130進退。
另外，肘節機構150的構成並不限定於圖1及圖2所示之構成。例如圖1及圖2中，各連桿群的節點的數量為5個，但亦可以係4個，且可以係第3連桿154之一端部結合於第1連桿152與第2連桿153的節點。
合模馬達160安裝於肘節座130，使肘節機構150作動。合模馬達160使十字頭151相對於肘節座130進退，藉此使第1連桿152及第2連桿153屈伸，並使活動壓板120相對於肘節座130進退。合模馬達160直接連結於運動轉換機構170，但亦可以透過帶體或滑輪等連結於運動轉換機構170。
運動轉換機構170將合模馬達160之旋轉運動轉換成十字頭151之直線運動。運動轉換機構170包括螺桿軸171及螺合於螺桿軸171之螺桿螺母172。可以於螺桿軸171與螺桿螺母172之間介入滾珠或滾子。
合模裝置100於控制裝置700之控制下進行閉模製程、合模製程、開模製程等。
閉模製程中，驅動合模馬達160使十字頭151以設定速度前進至閉模結束位置，藉此使活動壓板120前進，而使活動模820與固定模810接觸。十字頭151的位置和速度例如使用合模馬達編碼器161等檢測。合模馬達編碼器161檢測合模馬達160之旋轉，並將表示其檢測結果之信號發送至控制裝置700。另外，檢測十字頭151之位置的十字頭位置檢測器及檢測十字頭151之速度的十字頭速度檢測器並不限定於合模馬達編碼器161，能夠使用一般的檢測器。又，檢測活動壓板120之位置的活動壓板位置檢測器及檢測活動壓板120之速度的活動壓板速度檢測器並不限定於合模馬達編碼器161，能夠使用一般的檢測器。
合模製程中，進一步驅動合模馬達160使十字頭151從閉模結束位置進一步前進至合模位置，藉此產生合模力。合模時活動模820與固定模810之間形成模穴空間801（參閱圖2），射出裝置300於模穴空間801填充液態之成形材料。藉由使填充之成形材料固化而獲得成形品。模穴空間801的數量可以為複數個。該情況下，可同時獲得複數個成形品。
開模製程中，驅動合模馬達160使十字頭151以設定速度後退至開模結束位置，藉此使活動壓板120後退而使活動模820從固定模810分離。之後，頂出裝置200從活動模820頂出成形品。
閉模製程及合模製程中之設定條件以一系列設定條件的方式統一設定。例如，閉模製程及合模製程中之十字頭151的速度和位置（包括閉模開始位置、速度切換位置、閉模結束位置及合模位置）、合模力以一系列設定條件的方式統一設定。閉模開始位置、速度切換位置、閉模結束位置及合模位置，是從後側朝向前方依序排列，並表示速度被設定之區間的始點和終點。對每個區間設定速度。速度切換位置可以係一處，亦可以係多處。亦可以不設定速度切換位置。亦可以僅設定合模位置與合模力中之任一方。
開模製程中之設定條件亦以相同的形態設定。例如，開模製程中之十字頭151的速度和位置（包括開模開始位置、速度切換位置及開模結束位置）作為一系列設定條件而一並設定。開模開始位置、速度切換位置及開模結束位置從前側朝向後方依序排列並表示設定有速度之區間的始點和終點。對每個區間設定速度。速度切換位置可以係一處，亦可以係多處。亦可以不設定速度切換位置。開模開始位置與合模位置可以係同一位置。又，開模結束位置與閉模開始位置可以係同一位置。
另外，亦可以代替十字頭151之速度和位置等而設定活動壓板120之速度和位置等。又，亦可以代替十字頭之位置（例如合模位置）和活動壓板之位置而設定合模力。
肘節機構150增加合模馬達160之驅動力而傳遞至活動壓板120。其放大倍率亦被稱為肘節倍率。肘節倍率依因應1連桿152與第2連桿153所成之角θ（以下，亦稱為“連桿角度θ”）而變化。連桿角度θ根據十字頭151之位置求出。連桿角度θ為180°時，肘節倍率成為最大。
因模具裝置800之更換和模具裝置800之溫度變化等致使模具裝置800之厚度發生變化時，進行模厚調整以使合模時獲得既定之合模力。模厚調整中，例如將固定壓板110與肘節座130之間隔L調整為，在活動模820與固定模810接觸之模接觸的時點使肘節機構150之連桿角度θ成為既定的角度。
合模裝置100具有藉由調整固定壓板110與肘節座130之間隔L來進行模厚調整的模厚調整機構180。模厚調整機構180具有：螺桿軸181，形成於繫桿140之後端部；螺桿螺母182，旋轉自如地保持於肘節座130上；及模厚調整馬達183，使螺合於螺桿軸181之螺桿螺母182旋轉。
螺桿軸181及螺桿螺母182設置於每個繫桿140。模厚調整馬達183之旋轉可以透過旋轉傳遞部185傳遞至複數個螺桿螺母182。能夠使複數個螺桿螺母182同步旋轉。另外，亦能夠藉由變更旋轉傳遞部185之傳遞路徑來使複數個螺桿螺母182個別地旋轉。
旋轉傳遞部185例如由齒輪等構成。該情況下，於各螺桿螺母182的外周形成有從動齒輪，於模厚調整馬達183的輸出軸安裝有驅動齒輪，且與複數個從動齒輪及驅動齒輪嚙合之中間齒輪旋轉自如地保持於肘節座130之中央部。另外，旋轉傳遞部185亦可以代替齒輪而由帶體或滑輪等構成。
模厚調整機構180之作動受到控制裝置700之控制。控制裝置700驅活動模厚調整馬達183以使螺桿螺母182旋轉，藉此調整將螺桿螺母182保持為旋轉自如之肘節座130相對於固定壓板110的位置，進而調整固定壓板110與肘節座130之間隔L。
間隔L使用模厚調整馬達編碼器184來檢測。模厚調整馬達編碼器184檢測模厚調整馬達183之旋轉量和旋轉方向，並將表示其檢測結果之信號發送至控制裝置700。模厚調整馬達編碼器184之檢測結果於監視或控制肘節座130之位置、間隔L時使用。另外，檢測肘節座130之位置的肘節座位置檢測器及檢測間隔L之間隔檢測器並不限定於模厚調整馬達編碼器184，能夠使用一般的檢測器。
模厚調整機構180藉由使相互螺合之螺桿軸181與螺桿螺母182中之一方旋轉來調整間隔L。可以使用複數個模厚調整機構180，亦可以使用複數個模厚調整馬達183。
另外，本實施形態的合模裝置100係模開閉方向為水平方向之臥式，但亦可以係模開閉方向為上下方向之立式。
另外，本實施形態的合模裝置100作為驅動源具有合模馬達160，但亦可以代替合模馬達160而具有油壓缸。又，合模裝置100可以作為開閉模用具有線性馬達，而作為合模用具有電磁鐵。

（頂出裝置）
頂出裝置200之說明中，與合模裝置100之說明相同地，以閉模時的活動壓板120的移動方向（圖1及圖2中右方向）為前方，以開模時的活動壓板120的移動方向（圖1及圖2中左方向）為後方來進行說明。
頂出裝置200從模具裝置800頂出成形品。頂出裝置200具有頂出馬達210、運動轉換機構220及頂出桿230等。
頂出馬達210安裝於活動壓板120。頂出馬達210直接連結於運動轉換機構220，但亦可以透過帶體或滑輪等連結於運動轉換機構220。
運動轉換機構220將頂出馬達210之旋轉運動轉換成頂出桿230之直線運動。運動轉換機構220包括螺桿軸及螺合於螺桿軸之螺桿螺母。可以於螺桿軸與螺桿螺母之間介入滾珠或滾子。
頂出桿230於活動壓板120之貫通孔中進退自如。頂出桿230之前端部與進退自如地配設於活動模820之內部的活動構件830的頂出板831接觸。頂出桿230之前端部可以與活動構件830連結，亦可以不與其連結。又，於活動構件830的頂出板831設置有能夠從活動模820頂出成形品之頂出銷832。
頂出裝置200於控制裝置700之控制下進行頂出製程。
頂出製程中，驅動頂出馬達210使頂出桿230以設定速度從待機位置前進至頂出位置，藉此頂出桿230推壓頂出板831使活動構件830前進，而使活動構件830的頂出銷832從活動模820頂出成形品。之後，驅動頂出馬達210使頂出桿230以設定速度後退，而使活動構件830後退至原來的待機位置。頂出桿230的位置和速度例如使用頂出馬達編碼器211檢測。頂出馬達編碼器211檢測頂出馬達210之旋轉並將表示其檢測結果之信號發送至控制裝置700。另外，檢測頂出桿230之位置的頂出桿位置檢測器及檢測頂出桿230之速度的頂出桿速度檢測器並不限定於頂出馬達編碼器211，能夠使用一般的檢測器。

（射出裝置）
射出裝置300之說明中，與合模裝置100之說明和頂出裝置200之說明不同，以填充時螺桿330之移動方向（圖1及圖2中左方向）為前方，以計量時螺桿330之移動方向（圖1及圖2中右方向）為後方來進行說明。
射出裝置300設置於相對於框架900進退自如的滑動底座301，且相對於模具裝置800進退自如。射出裝置300與模具裝置800接觸，並向模具裝置800內之模穴空間801填充成形材料。射出裝置300例如具有缸體310、噴嘴320、螺桿330、計量馬達340、射出馬達350、壓力檢測器360等。
缸體310加熱從供給口311供給至內部之成形材料。成形材料例如包括樹脂等。成形材料例如形成為顆粒狀，並以固體狀態供給至供給口311。供給口311形成於缸體310之後部。於缸體310之後部的外周設置有水冷缸等的冷卻器312。於比冷卻器312更靠前方，缸體310之外周設置有帶狀加熱器等的加熱器313和溫度檢測器314。
缸體310沿缸體310之軸向（圖1及圖2中左右方向）劃分為複數個區域。於各區域設置有加熱器313和溫度檢測器314。控制裝置700控制加熱器313以使於每個區域之溫度檢測器314的檢測溫度成為設定溫度。
噴嘴320設置於缸體310之前端部，且被緊壓於模具裝置800。於噴嘴320之外周設置有加熱器313和溫度檢測器314。控制裝置700控制加熱器313以使噴嘴320之檢測溫度成為設定溫度。
螺桿330於缸體310內配設成旋轉自如且進退自如。若使螺桿330旋轉，則成形材料沿螺桿330之螺旋狀的槽被送往前方。成形材料一邊被送往前方，一邊藉由來自缸體310之熱而逐漸熔融。隨著液態之成形材料被送往螺桿330的前方並蓄積於缸體310之前部，螺桿330後退。之後，若使螺桿330前進，則蓄積於螺桿330前方之液態的成形材料從噴嘴320射出而填充於模具裝置800內。
逆止環331進退自如地安裝於螺桿330之前部以作為逆止閥，該逆止閥於將螺桿330推向前方時防止成形材料從螺桿330之前方向後方逆流。
使螺桿330前進時，逆止環331因螺桿330前方之成形材料的壓力而被推向後方，相對於螺桿330後退至堵住成形材料之流路的封閉位置（參閱圖2）。藉此，防止蓄積於螺桿330前方之成形材料向後方逆流。
另一方面，使螺桿330旋轉時，逆止環331因沿螺桿330之螺旋狀的槽被送往前方之成形材料的壓力而被推向前方，相對於螺桿330前進至開放成形材料之流路的開放位置（圖1參閱）為止。藉此，成形材料被送往螺桿330之前方。
逆止環331可以係與螺桿330一同旋轉之共旋類型和不與螺桿330一同旋轉之非共旋類型中之任一類型。
另外，射出裝置300可以具有使逆止環331相對於螺桿330於開放位置與封閉位置之間進退之驅動源。
計量馬達340使螺桿330旋轉。使螺桿330旋轉之驅動源並不限定於計量馬達340，例如可以係油壓泵等。
射出馬達350使螺桿330進退。射出馬達350與螺桿330之間設置有將射出馬達350之旋轉運動轉換成螺桿330之直線運動之運動轉換機構等。運動轉換機構例如具有螺桿軸及螺合於螺桿軸之螺桿螺母。可以於螺桿軸與螺桿螺母之間設置滾珠或滾子等。使螺桿330進退之驅動源並不限定於射出馬達350，例如亦可以係油壓缸等。
壓力檢測器360檢測於射出馬達350與螺桿330之間傳遞之力。檢測出的力通過控制裝置700被換算成壓力。壓力檢測器360設置於射出馬達350與螺桿330之間之力之傳遞路徑，並檢測作用於壓力檢測器360之力。
壓力檢測器360將表示其檢測結果之信號發送至控制裝置700。壓力檢測器360之檢測結果，於控制或監視螺桿330之從成形材料受到之壓力、對於螺桿330之背壓、螺桿330作用於成形材料之壓力等時使用。
射出裝置300於控制裝置700之控制下進行計量製程、填充製程及保壓製程等。
計量製程中，驅動計量馬達340使螺桿330以設定轉速旋轉，以沿螺桿330之螺旋狀的槽將成形材料送至前方。隨之，成形材料逐漸熔融。隨著液態之成形材料被送往螺桿330的前方並蓄積於缸體310之前部，螺桿330後退。螺桿330之轉速例如使用計量馬達編碼器341檢測。計量馬達編碼器341檢測計量馬達340之旋轉，並將表示其檢測結果之信號發送至控制裝置700。另外，檢測螺桿330之轉速的螺桿轉速檢測器並不限定於計量馬達編碼器341，能夠使用一般的檢測器。
計量製程中，為了限制螺桿330急劇後退，可以驅動射出馬達350而對螺桿330施加設定背壓。針對螺桿330的背壓例如使用壓力檢測器360檢測。壓力檢測器360將表示其檢測結果之信號發送至控制裝置700。若螺桿330後退至計量結束位置而於螺桿330之前方蓄積有既定量的成形材料，則計量製程結束。
填充製程中，驅動射出馬達350使螺桿330以設定速度前進，並將蓄積於螺桿330之前方的液態之成形材料填充於模具裝置800內的模穴空間801。螺桿330的位置和速度例如使用射出馬達編碼器351檢測。射出馬達編碼器351檢測射出馬達350之旋轉，並將表示其檢測結果之信號發送至控制裝置700。若螺桿330的位置到達設定位置，則進行從填充製程向保壓製程之切換（所謂，V/P切換）。將進行V/P切換之位置亦稱為V/P切換位置。螺桿330之設定速度可以按照螺桿330的位置或時間等而變更。
另外，填充製程中亦可以於螺桿330的位置到達設定位置之後，使螺桿330於其設定位置暫時停止，之後進行V/P切換。亦可以於即將進行V/P切換之前，代替螺桿330之停止而使螺桿330進行微速前進或微速後退。又，檢測螺桿330之位置的螺桿位置檢測器及檢測螺桿330之速度的螺桿速度檢測器並不限定於射出馬達編碼器351，能夠使用一般的檢測器。
保壓製程中，驅動射出馬達350將螺桿330推向前方，並將螺桿330之前端部的成形材料的壓力（以下，亦稱為“保持壓力”。）保持為設定壓，將殘留於缸體310內之成形材料推向模具裝置800。能夠補充因模具裝置800內之冷卻收縮引起之不足量的成形材料。保持壓力例如使用壓力檢測器360檢測。壓力檢測器360將表示其檢測結果之信號發送至控制裝置700。保持壓力之設定值可以按照自保壓製程開始之後經過的時間等而變更。
保壓製程中，模具裝置800內之模穴空間801的成形材料逐漸冷卻，保壓製程結束時模穴空間801之入口被固化之成形材料堵住。該狀態被稱為進模口密封(gate seal)，防止成形材料從模穴空間801逆流。保壓製程後，開始冷卻製程。冷卻製程中，進行模穴空間801內之成形材料的固化。為了縮短成形週期時間，可以於冷卻製程中進行計量製程。
另外，本實施形態的射出裝置300為直列螺桿方式，但亦可以係預塑化方式等。預塑化方式的射出裝置將塑化缸內所熔融之成形材料供給至射出缸，並從射出缸向模具裝置內射出成形材料。螺桿旋轉自如地或旋轉自如且進退自如地配設於塑化缸內，柱塞進退自如地配設於射出缸內。
又，本實施形態之射出裝置300的缸體310的軸向為水平方向的臥式，但亦可以係缸體310之軸向為上下方向的立式。與立式射出裝置300進行組合之合模裝置既可以係立式亦可以係臥式。同樣地，與臥式射出裝置300進行組合之合模裝置既可以係臥式亦可以係立式。

（移動裝置）
移動裝置400之說明中，與射出裝置300之說明相同地，以填充時螺桿330之移動方向（圖1及圖2中左方向）為前方，以計量時螺桿330之移動方向（圖1及圖2中右方向）為後方來進行說明。
移動裝置400使射出裝置300相對於模具裝置800進退。又，移動裝置400將噴嘴320緊壓於模具裝置800，並產生噴嘴接觸壓力。移動裝置400包括液壓泵410、作為驅動源之馬達420、作為液壓致動器之液壓缸430等。
液壓泵410具有第1埠411及第2埠412。液壓泵410為能夠雙向旋轉之泵，藉由切換馬達420之旋轉方向，從第1埠411及第2埠412中之任一個埠吸入作動液（例如油）並從另一個埠吐出而產生液壓。另外，液壓泵410亦能夠從儲槽抽吸作動液並從第1埠411與第2埠412中之任一個埠吐出作動液。
馬達420使液壓泵410作動。馬達420以與來自控制裝置700之控制信號相應之旋轉方向及轉矩驅動液壓泵410。馬達420可以係電動馬達，亦可以係電動伺服馬達。
液壓缸430具有缸體主體431、活塞432及活塞桿433。缸體主體431固定於射出裝置300。活塞432將缸體主體431之內部劃分為作為第1室之前室435與作為第2室之後室436。活塞桿433固定於固定壓板110。
液壓缸430之前室435透過第1流路401與液壓泵410之第1埠411連接。從第1埠411吐出之作動液透過第1流路401供給至前室435，而使射出裝置300被推向前方。射出裝置300前進，使噴嘴320緊壓於固定模810。前室435發揮藉由從液壓泵410供給之作動液的壓力而產生噴嘴320之噴嘴接觸壓力的作為壓力室之功能。
另一方面，液壓缸430之後室436透過第2流路402與液壓泵410之第2埠412連接。從第2埠412吐出之作動液透過第2流路402供給至液壓缸430之後室436，而使射出裝置300被推向後方。射出裝置300後退，而使噴嘴320從固定模810分離。
另外，本實施形態中移動裝置400包含液壓缸430，但本發明並不限定於此。例如亦可以代替液壓缸430而使用電動馬達及將該電動馬達之旋轉運動轉變成射出裝置300之直線運動之運動轉換機構。

（控制裝置）
控制裝置700例如由計算機構成，如圖1～圖2所示具有CPU（Central Processing Unit，中央處理器）701、記憶體等的記憶媒體702、輸入介面703及輸出介面704。控制裝置700使CPU701執行儲存於記憶媒體702之程式，藉此進行各種控制。又，控制裝置700藉由輸入介面703接收來自外部之信號，藉由輸出介面704向外部發送信號。
控制裝置700反覆進行閉模製程或合模製程、開模製程等，藉此反覆製造出成形品。又，控制裝置700於合模製程期間進行計量製程或填充製程、保壓製程等。將用於獲得成形品的一系列作動例如從計量製程開始至下一個計量製程開始為止的作動亦稱為“射出成形”或“成形週期”。又，將1次射出成形所需的時間亦稱為“成形週期時間”。
一次成形週期例如依序具有計量製程、閉模製程、合模製程、填充製程、保壓製程、冷卻製程、開模製程及頂出製程。這裏的順序為各製程開始之順序。填充製程、保壓製程及冷卻製程於合模製程開始至合模製程結束為止之期間進行。合模製程結束時間與開模製程開始時間一致。另外，為了縮短成形週期時間，亦可以同時進行複數個製程。例如計量製程可以於上一次的成形週期之冷卻製程中進行，該情況下，閉模製程可以於成形週期之初始階段進行。又，填充製程可以於閉模製程中開始。又，頂出製程可以於開模製程中開始。當設置有開閉噴嘴320之流路的開閉閥時，開模製程可以於計量製程中開始。即使開模製程於計量製程中開始，只要開閉閥關閉噴嘴320之流路，成形材料就不會從噴嘴320漏出。
控制裝置700與操作裝置750和顯示裝置760連接。操作裝置750接受使用者之輸入操作，將與輸入操作相應之信號輸出至控制裝置700。顯示裝置760於控制裝置700之控制下顯示與操作裝置750之輸入操作相應之操作畫面。
操作畫面於射出成形機10之設定等中使用。操作畫面備有複數個，進行切換顯示或重疊顯示。使用者一邊看著顯示裝置760上顯示之操作畫面，一邊操作操作裝置750，進而進行射出成形機10之設定（包括設定值之輸入）等。
操作裝置750及顯示裝置760例如由觸摸面板構成，可以設置成一體化。另外，本實施形態的操作裝置750及顯示裝置760雖然被設置成一體化，但亦可以獨立設置。又，操作裝置750可以設置有複數個。

（頂出桿調整方法）
參閱圖3、圖4對本實施形態的頂出桿調整方法進行說明。圖3為本實施形態之頂出桿230的立體圖。圖4為表示本實施形態之頂出桿調整方法的頂出桿230之前端面233的方向調整順序的概略圖。
頂出桿以懸臂狀態固定於頂出裝置200。因此，因前端部232（參閱圖3）之本身重量等的影響，頂出桿230會向鉛垂下方傾斜，而使前端面233（參閱圖3）亦向下方傾斜。若於前端面233傾斜之狀態下用頂出桿230推壓頂出板831，則頂出桿230成為局部碰觸，因此頂出桿230的前端面233無法均勻地碰觸頂出板831不，而產生強力碰觸之部分和輕微碰觸之部分。若無法對頂出板831均勻地施加推頂力，則因力之強弱而使頂出銷832之頂出量有所差異。因此，為了從模具取出成形品而對各成形品施加的頂出力產生偏差，有發生製品不良的疑慮。尤其在壓縮成形時，頂出力之偏差對製品不良之影響非常大。
於是，於本實施形態中，實施射出成形週期之前，調整頂出桿230而使頂出桿230之前端面233依循活動壓板120的模具安裝面121（參閱圖1、圖2）。本實施形態中將該調整順序稱為頂出桿調整方法。具體而言，將頂出桿230的前端面233推壓到與活動壓板120之模具安裝面121平行之基準面241（參閱圖4）而產生塑性變形。藉此，前端面233與模具安裝面121成為平行，避免頂出桿230之局部碰觸，進而能夠使前端面233均勻地與模具碰觸。
如圖3所示，本實施形態的頂出桿230之與頂出板831接觸側之前端部232，是由與固定於頂出裝置200側之基端部231不同之材料形成。基端部231與前端部232用螺栓或黏著等任意的方法固定。
前端部232的材料為比基端部231之材料柔軟的材料。在此，所謂材料柔軟係指屈服應力、保證應力(proof stress)、楊氏模量等小。如後述，使前端面233塑性變形時，是將頂出桿230用比頂出力更強的力緊壓於基準面241，藉由將前端部232設為比基端部231柔軟之材料，能夠使前端部232先變形，以防止基端部231之不必要的彎曲變形等。作為前端部232之材料，例如能夠使用鋁等的延展性良好且保證應力低之材料。
參閱圖4對調整如此般頂出桿230之前端面233的順序進行說明。圖4所示之一系列處理於執行射出成形機10之射出成形週期之前進行。
首先，如圖4（a）所示，於活動壓板120安裝有準塊240（安裝步驟）。基準塊240具有與模具安裝面121平行之基準面241。基準塊240例如為與活動模820大致相同之形狀。基準塊240，是以基準面241與模具安裝面121面接觸且配置於堵住供頂出桿230頂出之活動壓板120之貫通孔的位置的方式固定於活動壓板120。
接著，如圖4（b）所示，將頂出裝置200作動以使頂出桿230向前方移動，頂出桿230的前端面233被推壓到基準面241而產生塑性變形（調整步驟）。藉此，能夠使頂出桿230之前端面233依循活動壓板120的模具安裝面121，使得前端面233與模具安裝面121平行。
接著，如圖4（c）所示，頂出桿230後退而從基準塊240分離，活動模820與基準塊240互換而固定於活動壓板120。之後，射出成形機10執行射出成形週期。
在此，頂出桿230的前端部232是由即使以射出成形週期之頂出力與模具碰觸亦不會塑性變形之程度的柔軟的材料形成。又，調整步驟中，將前端面233推壓到基準面241之力設定為：比頂出力大，並且為使前端部232產生塑性變形程度之大小。亦即，頂出桿230的前端部232是由藉由推壓到基準塊240之力而產生塑性變形但藉由頂出力不會產生塑性變形之材料形成。
如此，本實施形態中，實施圖4所示之頂出桿調整方法，而進行使頂出桿230之前端面233依循活動壓板120的模具安裝面121之調整步驟，藉此能夠使頂出桿230之前端面233與模具安裝面121平行。藉此，能夠防止頂出桿230之局部碰觸，進而能夠實現成形品之頂出力的均勻化。
若實現對模具之各成形品施加的頂出力之均勻化，則從模具取下各成形品之情況下亦可實現均勻化，因此能夠抑制成形品之不良發生，藉此能夠防止製造精度的下降。例如，於製造可攜式終端機所使用之透鏡等的壓縮成形中，藉由頂出銷832壓縮模具內之成形材料而進行成形，因此頂出桿230之頂出力的偏差對製品精度之影響非常大。因此，基於本實施形態的頂出桿調整方法之效果於壓縮成形中尤其顯著。
又，本實施形態中，藉由將頂出桿230之前端面233推壓到與活動壓板120的模具安裝面121平行之基準面241而使其產生塑性變形來實現上述調整步驟。藉此，前端面233之方向一旦被調整就不會復原，因此能夠確實地維持前端面233之方向，藉此能夠穩定地進行成形品之頂出。
又，本實施形態中，作為用於加工頂出桿230之前端面233的基準面241使用安裝於活動壓板120之基準塊240。基準塊240與活動模820相同地設置於活動壓板120之模具安裝面121，因此能夠輕易確實地使基準面241與模具安裝面121達到平行。藉此，藉由該基準面241而調整方向後之頂出桿230的前端面233之方向亦能夠輕易確實地與模具安裝面121達到平行。
另外，本實施形態中例示出頂出桿230的前端部232由比基端部231柔軟之材料形成之構成，但頂出桿230整體亦可以由相同之材料形成。

（頂出桿調整方法的變形例）
接著，參閱圖5、圖6對變形例進行說明。圖5為表示變形例之頂出桿230A的圖。圖6為表示使用了變形例之頂出桿230A的頂出桿230A之前端面233的方向調整順序的概略之圖。圖5（a）為頂出桿230A的前端部232附近的側視圖。圖5（b）為圖5（a）中之A-A剖面圖，且為表示調整部234之構成的一例之圖。
變形例中，頂出桿230A具有能夠調整前端面233之方向的調整部234。調整部234例如如圖5（a）所示般，包括配置在比前端面233更靠基端側之球接頭235，藉由球接頭235之旋轉，能夠相對於基端部231任意變更前端面233之方向。
又，調整部234能夠將前端面233之方向固定為既定方向。固定方法能夠採用任意之周知的構成，但例如如圖5（b）所示，能夠構成為具有：沿球接頭235之周向延伸且在一處具有間隙236A之大致C字形的外周部236、及能夠使該外周部236伸縮之間隙236A的螺栓237之構成。藉由螺栓237之緊固使外周部236之間隙236A縮小，因此使外周部236與球接頭235牢固地密合，能夠限制球接頭235之移動，藉此能夠於基端部231固定前端部232。藉此，亦能夠固定前端面233之方向（參閱圖6（c））。
參閱圖6對調整如此般頂出桿230A之前端面233的順序進行說明。圖6所示之一系列處理於執行射出成形機10之射出成形週期之前進行。
首先，如圖6（a）所示，於活動壓板120安裝基準塊240A（安裝步驟）。基準塊240A中，與模具安裝面121面接觸之面當中包括堵住活動壓板120之貫通孔的部分之一部分被挖除，該挖除部分的底面成為基準面241A。基準面241A形成為與活動壓板120之模具安裝面121平行。
接著，如圖6（b）所示，將頂出裝置200作動以使頂出桿230A向前方移動，頂出桿230A之前端面233被推壓到基準面241A，藉由調整部234而調整前端面233的方向（調整步驟）。藉此，能夠使頂出桿230A之前端面233依循活動壓板120的模具安裝面121，使得前端面233與模具安裝面121平行。
接著，如圖6（c）所示，調整部234藉由螺栓237之緊固而固定，頂出桿230A之前端面233的方向被固定。藉此，前端面233與模具安裝面121保持平行之狀態。另外，螺栓237之緊固例如能夠於基準塊240A設置孔並從該孔向基準塊240A內***螺栓237來進行。
之後，如圖6（d）所示，頂出桿230A後退而從基準塊240A分離，活動模820與基準塊240A互換而固定於活動壓板120。之後，射出成形機10執行射出成形週期。
如此，即使使用變形例的頂出桿230A，只要實施圖6所示之頂出桿調整方法便能夠與上述實施形態相同地使頂出桿230A之前端面233與模具安裝面121平行，藉此防止頂出桿230A之局部碰觸以實現成形品之頂出力的均勻化。
以上，參閱具體例對本實施形態進行了說明。但是，本發明並不限定於該些具體例者。本領域技術人員於該些具體例上加以適當設計變更者，只要具備本發明的特徵，則亦屬於本發明的範圍。前述各具體例所具備之各要件及其配置、條件、形狀等並不限定於例示者，能夠進行適當變更。前述各具體例所具備之各要件只要沒有技術性的矛盾，則能夠適當改變組合。
上述實施形態中，作為用於調整頂出桿230、230A的前端面233的方向的基準面，使用安裝於活動壓板120的基準塊240、240A的基準面241、241A，但亦可以使用除此以外的基準面。
頂出桿230之前端面233只要最終與活動壓板120的模具安裝面121平行即可，調整方法可以係上述以外的方法。例如可以將頂出桿230之前端面233進行研磨或切削加工以使其與模具安裝面121平行。Hereinafter, embodiments will be described with reference to the drawings. For ease of understanding, the same constituent elements are marked with the same symbols as much as possible in the drawings to omit description.
First, an overall schematic configuration of an injection molding machine 10 according to this embodiment will be described with reference to FIGS. 1 and 2.

(Injection molding machine)
FIG. 1 is a diagram showing a state at the end of mold opening of an injection molding machine according to an embodiment. FIG. 2 is a view showing a state of the injection molding machine according to the embodiment when the mold is closed. In FIGS. 1 to 2, the X direction, the Y direction, and the Z direction are mutually perpendicular directions. The X and Y directions are horizontal, and the Z direction is vertical. When the mold clamping device 100 is horizontal, the X direction is the mold opening and closing direction, and the Y direction is the width direction of the injection molding machine 10. As shown in FIGS. 1 to 2, the injection molding machine 10 includes a mold clamping device 100, an ejection device 200, an injection device 300, a moving device 400, a control device 700, and a frame 900. Hereinafter, each component of the injection molding machine 10 will be described.

(Clamping device)
In the description of the mold clamping device 100, the moving direction of the movable platen 120 (right direction in Figs. 1 and 2) when the mold is closed is taken as the front, and the moving direction of the movable platen 120 when the mold is opened (in Figs. 1 and 2) (Left direction) will be described in the rear.
The mold clamping device 100 performs mold closing, mold clamping, and mold opening of the mold device 800. The mold clamping device 100 is, for example, a horizontal type, and the mold opening and closing direction is a horizontal direction. The mold clamping device 100 includes a fixed platen 110, a movable platen 120, a toggle seat 130, a tie bar 140, a toggle mechanism 150, a mold clamping motor 160, a motion conversion mechanism 170, and a mold thickness adjustment mechanism 180.
The fixing platen 110 is fixed to the frame 900. A fixed die 810 is attached to a surface of the fixed platen 110 that faces the movable platen 120.
The movable platen 120 can move freely in the mold opening and closing direction with respect to the frame 900. A guide 101 for guiding the movable platen 120 is laid on the frame 900. A movable die 820 is attached to a surface of the movable platen 120 that faces the fixed platen 110.
The movable platen 120 is moved forward and backward with respect to the fixed platen 110, thereby closing, closing, and opening the mold. The fixed mold 810 and the movable mold 820 constitute a mold device 800.
The toggle seat 130 is connected to the fixed platen 110 at intervals, and is placed on the frame 900 in a freely movable manner along the mold opening and closing direction. In addition, the toggle seat 130 can also move freely along the guide member laid on the frame 900. The guide of the toggle seat 130 may be the same as the guide 101 of the movable platen 120.
In addition, in this embodiment, the fixed platen 110 is fixed to the frame 900, and the toggle seat 130 is free to move in the mold opening and closing direction with respect to the frame 900. However, the toggle plate 130 may be fixed to the frame 900, and the fixed platen 110 may be fixed to the frame 900 Move freely along the mold opening and closing direction.
The tie bar 140 connects the fixed platen 110 and the toggle seat 130 with a space L in the mold opening and closing direction. The tie rod 140 may use a plurality of rods (for example, 4 rods). Each tie bar 140 is parallel to the mold opening and closing direction, and extends in response to the mold clamping force. A tie rod strain detector 141 for detecting a strain of the tie rod 140 may be provided on at least one tie rod 140. The tie rod strain detector 141 sends a signal indicating the detection result to the control device 700. The detection result of the tie bar strain detector 141 is used for detecting the clamping force and the like.
In this embodiment, the tie rod strain detector 141 is used as the clamping force detector for detecting the clamping force, but the present invention is not limited to this. The clamping force detector is not limited to the strain gauge type, and may be a piezoelectric type, a capacitive type, a hydraulic type, an electromagnetic type, and the like, and its installation position is not limited to the tie rod 140.
The toggle mechanism 150 is disposed between the movable platen 120 and the toggle seat 130, and moves the movable platen 120 in the mold opening and closing direction relative to the toggle seat 130. The toggle mechanism 150 includes a cross head 151, a pair of link groups, and the like. Each link group includes a first link 152 and a second link 153 that are connected to each other so as to be flexibly extendable by pins or the like. The first link 152 is mounted with a pin or the like to swing freely with respect to the movable platen 120, and the second link 153 is mounted with a pin or the like to swing freely with respect to the toggle seat 130. The second link 153 is attached to the cross head 151 through the third link 154. When the crosshead 151 is advanced and retracted with respect to the toggle joint 130, the first link 152 and the second link 153 are flexed and extended, and the movable platen 120 is advanced and retracted with respect to the toggle joint 130.
The configuration of the toggle mechanism 150 is not limited to the configuration shown in FIGS. 1 and 2. For example, in FIGS. 1 and 2, the number of nodes of each link group is five, but it can also be four, and one end of the third link 154 can be combined with the first link 152 and the second link. 153 nodes.
The mold clamping motor 160 is mounted on the toggle base 130 and operates the toggle mechanism 150. The mold clamping motor 160 advances and retracts the crosshead 151 relative to the toggle base 130, thereby flexing and extending the first link 152 and the second link 153, and advances and retracts the movable platen 120 relative to the toggle base 130. The mold clamping motor 160 is directly connected to the motion conversion mechanism 170, but may also be connected to the motion conversion mechanism 170 through a belt or a pulley.
The motion conversion mechanism 170 converts the rotational motion of the mold clamping motor 160 into a linear motion of the cross head 151. The motion conversion mechanism 170 includes a screw shaft 171 and a screw nut 172 screwed to the screw shaft 171. Balls or rollers may be interposed between the screw shaft 171 and the screw nut 172.
The mold clamping device 100 performs a closed mold process, a mold clamping process, an open mold process, and the like under the control of the control device 700.
During the mold closing process, the mold clamping motor 160 is driven to advance the crosshead 151 to the mold closing end position at a set speed, thereby moving the movable platen 120 forward and bringing the movable mold 820 into contact with the fixed mold 810. The position and speed of the crosshead 151 are detected using, for example, a mold clamping motor encoder 161 or the like. The mold clamping motor encoder 161 detects the rotation of the mold clamping motor 160 and sends a signal indicating the detection result to the control device 700. The cross head position detector that detects the position of the cross head 151 and the cross head speed detector that detects the speed of the cross head 151 are not limited to the mold clamping motor encoder 161, and general detectors can be used. The movable platen position detector that detects the position of the movable platen 120 and the movable platen speed detector that detects the speed of the movable platen 120 are not limited to the mold clamping motor encoder 161, and a common detector can be used.
During the mold clamping process, the mold clamping motor 160 is further driven to further advance the crosshead 151 from the mold closing end position to the mold clamping position, thereby generating a mold clamping force. When the mold is closed, a cavity space 801 is formed between the movable mold 820 and the fixed mold 810 (see FIG. 2), and the injection device 300 is filled with a liquid forming material in the cavity space 801. A molded article is obtained by curing the filled molding material. The number of the cavity spaces 801 may be plural. In this case, a plurality of molded products can be obtained simultaneously.
During the mold opening process, the mold clamping motor 160 is driven to move the crosshead 151 back to the mold opening end position at a set speed, thereby moving the movable platen 120 back and separating the movable mold 820 from the fixed mold 810. Thereafter, the ejection device 200 ejects the molded product from the movable mold 820.
The setting conditions in the closed molding process and the clamping molding process are uniformly set by a series of setting conditions. For example, the speed and position of the crosshead 151 (including the mold closing start position, speed switching position, mold closing end position, and mold clamping position) and mold clamping force during the mold closing and clamping process are unified in a series of set conditions. set up. The mold closing start position, speed switching position, mold closing end position, and mold clamping position are sequentially arranged from the back side toward the front, and indicate the start and end points of the section where the speed is set. Set the speed for each zone. The speed switching position can be tied in one place or in multiple places. It is not necessary to set the speed switching position. It is also possible to set only one of the clamping position and the clamping force.
The setting conditions in the mold opening process are also set in the same form. For example, the speed and position of the crosshead 151 in the mold opening process (including the mold opening start position, the speed switching position, and the mold opening end position) are set together as a series of setting conditions. The mold opening start position, the speed switching position, and the mold opening end position are sequentially arranged from the front side toward the rear, and indicate the start point and end point of the section where the speed is set. Set the speed for each zone. The speed switching position can be tied in one place or in multiple places. It is not necessary to set the speed switching position. The starting position of the mold opening and the closing position may be the same position. The mold opening end position and the mold closing start position may be the same position.
In addition, instead of the speed and position of the crosshead 151, the speed and position of the movable platen 120 may be set. In addition, the clamping force can also be set instead of the position of the crosshead (such as the clamping position) and the position of the movable platen.
The toggle mechanism 150 increases the driving force of the mold clamping motor 160 and transmits it to the movable platen 120. Its magnification is also known as the toggle magnification. The toggle ratio changes in accordance with an angle θ (hereinafter, also referred to as a “link angle θ”) formed by the first link 152 and the second link 153. The link angle θ is obtained from the position of the cross head 151. When the link angle θ is 180 °, the toggle ratio becomes the maximum.
When the thickness of the mold device 800 is changed due to the replacement of the mold device 800 and the temperature change of the mold device 800, the mold thickness is adjusted to obtain a predetermined clamping force when the mold is closed. In the mold thickness adjustment, for example, the distance L between the fixed platen 110 and the toggle seat 130 is adjusted so that the link angle θ of the toggle mechanism 150 becomes a predetermined angle when the movable mold 820 and the mold in contact with the fixed mold 810 contact.
The mold clamping device 100 includes a mold thickness adjustment mechanism 180 that adjusts the mold thickness by adjusting the interval L between the fixed platen 110 and the toggle seat 130. The mold thickness adjustment mechanism 180 includes: a screw shaft 181 formed at the rear end of the tie rod 140; a screw nut 182 that is rotatably held on the toggle base 130; and a mold thickness adjustment motor 183 that is screwed onto the screw shaft 181 The screw nut 182 rotates.
A screw shaft 181 and a screw nut 182 are provided on each tie bar 140. The rotation of the mold thickness adjusting motor 183 can be transmitted to the plurality of screw nuts 182 through the rotation transmitting portion 185. The plurality of screw nuts 182 can be rotated simultaneously. In addition, the plurality of screw nuts 182 can be individually rotated by changing the transmission path of the rotation transmission section 185.
The rotation transmission portion 185 is configured by, for example, a gear. In this case, a driven gear is formed on the outer periphery of each screw nut 182, a driving gear is mounted on the output shaft of the die thickness adjustment motor 183, and an intermediate gear that meshes with the plurality of driven gears and driving gears is rotatably held at The central part of the toggle seat 130. In addition, the rotation transmission part 185 may be comprised of a belt body, a pulley, etc. instead of a gear.
The operation of the mold thickness adjusting mechanism 180 is controlled by the control device 700. The control device 700 drives the movable die thickness adjustment motor 183 to rotate the screw nut 182, thereby adjusting the position of the toggle nut 130 holding the screw nut 182 to rotate freely with respect to the fixed platen 110, thereby adjusting the fixed platen 110 and the toggle plate. The interval L is 130.
The interval L is detected using a mold thickness adjustment motor encoder 184. The mold thickness adjustment motor encoder 184 detects the rotation amount and the rotation direction of the mold thickness adjustment motor 183, and sends a signal indicating the detection result to the control device 700. The detection result of the mold thickness adjustment motor encoder 184 is used when monitoring or controlling the position and interval L of the toggle seat 130. In addition, the toggle seat position detector and the interval detector for detecting the interval L for detecting the position of the toggle seat 130 are not limited to the mold thickness adjustment motor encoder 184, and a common detector can be used.
The die thickness adjusting mechanism 180 adjusts the interval L by rotating one of the screw shaft 181 and the screw nut 182 which are screwed together. A plurality of mold thickness adjustment mechanisms 180 may be used, or a plurality of mold thickness adjustment motors 183 may be used.
In addition, the mold clamping device 100 of the present embodiment is a horizontal type in which the mold opening and closing direction is a horizontal direction, but may be a vertical type in which the mold opening and closing direction is a vertical direction.
In addition, although the mold clamping device 100 according to the present embodiment includes a mold clamping motor 160 as a drive source, it may include a hydraulic cylinder instead of the mold clamping motor 160. The mold clamping device 100 may include a linear motor for mold opening and closing and an electromagnet for mold clamping.

(Ejector)
In the description of the ejection device 200, similar to the description of the mold clamping device 100, the moving direction of the movable platen 120 (right direction in FIG. 1 and FIG. 2) when the mold is closed is taken as the front, and the movable platen 120 when the mold is opened is used The moving direction (left direction in FIG. 1 and FIG. 2) is described below.
The ejection device 200 ejects a molded product from the mold device 800. The ejection device 200 includes an ejection motor 210, a motion conversion mechanism 220, an ejection lever 230, and the like.
The ejection motor 210 is mounted on the movable platen 120. The ejection motor 210 is directly connected to the motion conversion mechanism 220, but may be connected to the motion conversion mechanism 220 through a belt or a pulley.
The motion conversion mechanism 220 converts a rotary motion of the ejection motor 210 into a linear motion of the ejection lever 230. The motion conversion mechanism 220 includes a screw shaft and a screw nut screwed onto the screw shaft. Balls or rollers can be interposed between the screw shaft and the screw nut.
The ejection lever 230 moves forward and backward freely in the through hole of the movable platen 120. The front end of the ejection lever 230 is in contact with the ejection plate 831 of the movable member 830 that is freely arranged inside the movable mold 820. The front end of the ejector rod 230 may be connected to the movable member 830 or not. Further, an ejection pin 832 is provided on the ejection plate 831 of the movable member 830 to eject the molded product from the movable mold 820.
The ejection device 200 performs an ejection process under the control of the control device 700.
In the ejection process, the ejection motor 210 is driven to advance the ejection lever 230 from the standby position to the ejection position at a set speed, whereby the ejection lever 230 pushes the ejection plate 831 to advance the movable member 830, and the movable member 830 is advanced. The ejection pin 832 ejects the molded product from the movable mold 820. Thereafter, the ejection motor 210 is driven to retreat the ejection lever 230 at a set speed, and the movable member 830 is retracted to the original standby position. The position and speed of the ejection lever 230 are detected using, for example, an ejection motor encoder 211. The ejection motor encoder 211 detects the rotation of the ejection motor 210 and sends a signal indicating the detection result to the control device 700. In addition, the ejection lever position detector that detects the position of the ejection lever 230 and the ejection lever speed detector that detects the speed of the ejection lever 230 are not limited to the ejection motor encoder 211, and general detectors can be used.

(Injection device)
The description of the injection device 300 is different from the description of the mold clamping device 100 and the ejection device 200. The movement direction of the screw 330 (left direction in FIG. 1 and FIG. 2) during filling is forward, and the measurement of the screw 330 during measurement The moving direction (the right direction in FIGS. 1 and 2) will be described in the rear.
The injection device 300 is provided on a sliding base 301 that can move forward and backward with respect to the frame 900 and can move forward and backward with respect to the mold device 800. The injection device 300 is in contact with the mold device 800 and fills the cavity space 801 in the mold device 800 with a molding material. The injection device 300 includes, for example, a cylinder 310, a nozzle 320, a screw 330, a metering motor 340, an injection motor 350, a pressure detector 360, and the like.
The cylinder 310 heats the molding material supplied from the supply port 311 to the inside. The molding material includes, for example, resin. The molding material is formed into a pellet shape, for example, and is supplied to the supply port 311 in a solid state. The supply port 311 is formed at the rear of the cylinder block 310. A cooler 312 such as a water-cooled cylinder is provided on the outer periphery of the rear portion of the cylinder block 310. Further ahead of the cooler 312, a heater 313 such as a band heater and a temperature detector 314 are provided on the outer periphery of the cylinder block 310.
The cylinder block 310 is divided into a plurality of regions along the axial direction of the cylinder block 310 (left-right direction in FIGS. 1 and 2). A heater 313 and a temperature detector 314 are provided in each area. The control device 700 controls the heater 313 so that the temperature detected by the temperature detector 314 in each area becomes a set temperature.
The nozzle 320 is disposed at the front end of the cylinder block 310 and is tightly pressed against the mold device 800. A heater 313 and a temperature detector 314 are provided on the outer periphery of the nozzle 320. The control device 700 controls the heater 313 so that the detected temperature of the nozzle 320 becomes a set temperature.
The screw 330 is arranged in the cylinder body 310 to rotate freely and move forward and backward freely. When the screw 330 is rotated, the molding material is sent forward along the spiral groove of the screw 330. The molding material is gradually melted by the heat from the cylinder 310 while being sent forward. As the liquid molding material is sent to the front of the screw 330 and accumulated in the front of the cylinder block 310, the screw 330 moves backward. Thereafter, when the screw 330 is advanced, the liquid molding material accumulated in front of the screw 330 is ejected from the nozzle 320 and filled in the mold device 800.
The check ring 331 is movably mounted on the front of the screw 330 as a check valve. The check valve prevents the molding material from flowing backward from the front of the screw 330 when the screw 330 is pushed forward.
When the screw 330 is advanced, the check ring 331 is pushed backward by the pressure of the molding material in front of the screw 330, and retracts relative to the screw 330 to a closed position that blocks the flow path of the molding material (see FIG. 2). This prevents the molding material accumulated in front of the screw 330 from flowing backward.
On the other hand, when the screw 330 is rotated, the check ring 331 is pushed forward by the pressure of the molding material being sent forward along the spiral groove of the screw 330, and advances to the opening of the molding material flow path relative to the screw 330. To the open position (see Figure 1). Thereby, the molding material is sent in front of the screw 330.
The check ring 331 may be any one of a co-rotation type that rotates with the screw 330 and a non-co-rotation type that does not rotate with the screw 330.
In addition, the injection device 300 may include a drive source that advances and retracts the check ring 331 with respect to the screw 330 between an open position and a closed position.
The metering motor 340 rotates the screw 330. The driving source for rotating the screw 330 is not limited to the metering motor 340, and may be, for example, a hydraulic pump.
The injection motor 350 advances and retreats the screw 330. A motion conversion mechanism or the like is provided between the injection motor 350 and the screw 330 to convert the rotational motion of the injection motor 350 into a linear motion of the screw 330. The motion conversion mechanism includes, for example, a screw shaft and a screw nut screwed to the screw shaft. Balls or rollers can be placed between the screw shaft and the screw nut. The driving source for advancing and retreating the screw 330 is not limited to the injection motor 350, and may be, for example, a hydraulic cylinder.
The pressure detector 360 detects a force transmitted between the injection motor 350 and the screw 330. The detected force is converted into a pressure by the control device 700. The pressure detector 360 is provided in a force transmission path between the injection motor 350 and the screw 330 and detects the force acting on the pressure detector 360.
The pressure detector 360 sends a signal indicating the detection result to the control device 700. The detection result of the pressure detector 360 is used when controlling or monitoring the pressure received by the screw 330 from the molding material, the back pressure on the screw 330, and the pressure exerted by the screw 330 on the molding material.
The injection device 300 performs a measurement process, a filling process, a holding process, and the like under the control of the control device 700.
In the measurement process, the measurement motor 340 is driven to rotate the screw 330 at a set rotation speed, and the forming material is sent forward along a spiral groove of the screw 330. As a result, the molding material gradually melts. As the liquid molding material is sent to the front of the screw 330 and accumulated in the front of the cylinder block 310, the screw 330 moves backward. The rotation speed of the screw 330 is detected using, for example, a metering motor encoder 341. The measurement motor encoder 341 detects the rotation of the measurement motor 340 and sends a signal indicating the detection result to the control device 700. The screw rotation speed detector that detects the rotation speed of the screw 330 is not limited to the measuring motor encoder 341, and a general detector can be used.
In order to limit the rapid retreat of the screw 330 during the measurement process, the injection motor 350 may be driven to apply a set back pressure to the screw 330. The back pressure on the screw 330 is detected using, for example, a pressure detector 360. The pressure detector 360 sends a signal indicating the detection result to the control device 700. When the screw 330 is retracted to the measurement end position and a predetermined amount of molding material is accumulated in front of the screw 330, the measurement process ends.
In the filling process, the injection motor 350 is driven to advance the screw 330 at a set speed, and the liquid molding material stored in front of the screw 330 is filled in the cavity space 801 in the mold device 800. The position and speed of the screw 330 are detected using, for example, an injection motor encoder 351. The injection motor encoder 351 detects the rotation of the injection motor 350 and sends a signal indicating the detection result to the control device 700. When the position of the screw 330 reaches the set position, switching from the filling process to the holding process (so-called V / P switching) is performed. The position where the V / P switching is performed is also referred to as the V / P switching position. The set speed of the screw 330 can be changed according to the position, time, etc. of the screw 330.
In addition, during the filling process, after the position of the screw 330 reaches the set position, the screw 330 may be temporarily stopped at the set position, and then V / P switching may be performed. Before the V / P switching is performed, the screw 330 may be moved forward or back slightly instead of stopping the screw 330. The screw position detector that detects the position of the screw 330 and the screw speed detector that detects the speed of the screw 330 are not limited to the injection motor encoder 351, and a common detector can be used.
During the holding process, the injection motor 350 is driven to push the screw 330 forward, and the pressure of the molding material at the front end of the screw 330 (hereinafter, also referred to as “holding pressure”) is maintained at a set pressure to remain in the cylinder The molding material in 310 is pushed toward the mold device 800. It is possible to supplement the insufficient amount of the molding material due to the cooling shrinkage in the mold device 800. The holding pressure is detected using a pressure detector 360, for example. The pressure detector 360 sends a signal indicating the detection result to the control device 700. The setting value of the holding pressure can be changed according to the elapsed time since the start of the holding pressure process.
During the holding process, the forming material in the cavity space 801 in the mold device 800 is gradually cooled, and the entrance of the cavity space 801 is blocked by the solidified forming material at the end of the holding process. This state is called a gate seal, and prevents the molding material from flowing backward from the cavity space 801. After the holding process, the cooling process is started. During the cooling process, the molding material in the cavity space 801 is solidified. In order to shorten the molding cycle time, a metering process can be performed in the cooling process.
In addition, although the injection device 300 of this embodiment is an in-line screw type, it may be a pre-plasticizing type or the like. The injection device of the pre-plasticizing method supplies the molding material melted in the plasticizing cylinder to the injection cylinder, and injects the molding material from the injection cylinder into the mold device. The screw is freely rotatable or rotatable and freely advancing and retreating is provided in the plasticizing cylinder, and the plunger is freely advancing and retreating in the injection cylinder.
In addition, although the axial direction of the cylinder 310 of the injection device 300 of this embodiment is a horizontal type in which the axial direction is horizontal, it may be a vertical type in which the axial direction of the cylinder 310 is vertical. The mold clamping device combined with the vertical injection device 300 can be either vertical or horizontal. Similarly, the mold clamping device combined with the horizontal injection device 300 may be a horizontal type or a vertical type.

(Mobile device)
In the description of the moving device 400, the moving direction of the screw 330 (left direction in FIG. 1 and FIG. 2) during filling is the same as the description of the injection device 300, and the moving direction of the screw 330 (FIG. 1 and FIG. 2 center right direction) will be described in the rear.
The moving device 400 advances and retreats the injection device 300 relative to the mold device 800. In addition, the moving device 400 presses the nozzle 320 against the mold device 800 and generates a nozzle contact pressure. The moving device 400 includes a hydraulic pump 410, a motor 420 as a driving source, a hydraulic cylinder 430 as a hydraulic actuator, and the like.
The hydraulic pump 410 includes a first port 411 and a second port 412. The hydraulic pump 410 is a pump capable of bidirectional rotation. By switching the rotation direction of the motor 420, a hydraulic fluid (such as oil) is sucked in from any of the first port 411 and the second port 412, and is discharged from the other port to generate hydraulic pressure. . In addition, the hydraulic pump 410 can also suck the working fluid from the storage tank and discharge the working fluid from any one of the first port 411 and the second port 412.
The motor 420 operates the hydraulic pump 410. The motor 420 drives the hydraulic pump 410 with a rotation direction and a torque corresponding to a control signal from the control device 700. The motor 420 may be an electric motor or an electric servo motor.
The hydraulic cylinder 430 includes a cylinder body 431, a piston 432, and a piston rod 433. The cylinder body 431 is fixed to the injection device 300. The piston 432 divides the inside of the cylinder body 431 into a front chamber 435 as a first chamber and a rear chamber 436 as a second chamber. The piston rod 433 is fixed to the fixed platen 110.
The front chamber 435 of the hydraulic cylinder 430 is connected to the first port 411 of the hydraulic pump 410 through the first flow path 401. The working fluid discharged from the first port 411 is supplied to the front chamber 435 through the first flow path 401, and the injection device 300 is pushed forward. The injection device 300 advances and presses the nozzle 320 against the fixed mold 810. The front chamber 435 functions as a pressure chamber that generates the nozzle contact pressure of the nozzle 320 by the pressure of the working fluid supplied from the hydraulic pump 410.
On the other hand, the rear chamber 436 of the hydraulic cylinder 430 is connected to the second port 412 of the hydraulic pump 410 through the second flow path 402. The working fluid discharged from the second port 412 is supplied to the rear chamber 436 of the hydraulic cylinder 430 through the second flow path 402, and the injection device 300 is pushed backward. The injection device 300 moves backward and separates the nozzle 320 from the fixed mold 810.
Although the moving device 400 includes the hydraulic cylinder 430 in the present embodiment, the present invention is not limited to this. For example, instead of the hydraulic cylinder 430, an electric motor and a motion conversion mechanism that converts the rotary motion of the electric motor into the linear motion of the injection device 300 may be used.

(Control device)
The control device 700 is composed of, for example, a computer, and has a central processing unit (CPU) 701, a memory medium 702 such as a memory, an input interface 703, and an output interface 704 as shown in FIGS. 1 to 2. The control device 700 causes the CPU 701 to execute a program stored in the storage medium 702, thereby performing various controls. In addition, the control device 700 receives signals from the outside through the input interface 703, and sends signals to the outside through the output interface 704.
The control device 700 repeatedly performs a closed molding process, a closed mold process, an open mold process, and the like, thereby repeatedly manufacturing a molded product. In addition, the control device 700 performs a measurement process, a filling process, a pressing process, and the like during the mold clamping process. A series of operations for obtaining a molded product, for example, operations from the start of a measurement process to the start of the next measurement process are also referred to as "injection molding" or "molding cycle". The time required for one injection molding is also referred to as the "molding cycle time".
A forming cycle includes, for example, a metering process, a closed mold process, a mold clamping process, a filling process, a holding process, a cooling process, a mold opening process, and an ejection process in order. The sequence here is the sequence of each process. The filling process, the holding process, and the cooling process are performed between the start of the mold clamping process and the end of the mold clamping process. The end time of the mold clamping process is the same as the start time of the mold opening process. In addition, in order to shorten the molding cycle time, a plurality of processes can be performed simultaneously. For example, the metering process can be performed during the cooling process of the previous forming cycle. In this case, the closed mold process can be performed at the initial stage of the forming cycle. The filling process may be started in a closed mold process. In addition, the ejection process can be started during the mold opening process. When the on-off valve of the flow path of the opening-closing nozzle 320 is provided, the mold-opening process can be started in the measurement process. Even if the mold-opening process is started in the measurement process, as long as the on-off valve closes the flow path of the nozzle 320, the molding material will not leak from the nozzle 320.
The control device 700 is connected to the operation device 750 and the display device 760. The operation device 750 receives an input operation by the user and outputs a signal corresponding to the input operation to the control device 700. The display device 760 displays an operation screen corresponding to the input operation of the operation device 750 under the control of the control device 700.
The operation screen is used for setting and the like of the injection molding machine 10. There are multiple operation screens for switching display or overlapping display. The user operates the operation device 750 while looking at the operation screen displayed on the display device 760 to perform settings (including input of setting values) of the injection molding machine 10 and the like.
The operation device 750 and the display device 760 are configured by, for example, a touch panel, and may be integrated. In addition, although the operation device 750 and the display device 760 of this embodiment are integrated, they may be installed independently. The operation device 750 may be provided in plural.

(Ejector lever adjustment method)
A method for adjusting the ejector lever according to this embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view of the ejector rod 230 according to this embodiment. FIG. 4 is a schematic diagram illustrating a direction adjustment sequence of the front end surface 233 of the ejector lever 230 in the ejector lever adjustment method of the present embodiment.
The ejection lever is fixed to the ejection device 200 in a cantilever state. Therefore, due to the influence of the weight of the front end portion 232 (see FIG. 3) and the like, the ejector lever 230 is inclined downward, and the front end surface 233 (see FIG. 3) is also inclined downward. If the ejector lever 230 is used to push the ejector plate 831 in a state where the front end surface 233 is inclined, the ejector lever 230 becomes a partial contact, so the front end surface 233 of the ejector lever 230 cannot uniformly touch the ejector plate 831. And the strong touch part and the light touch part. If the ejection force cannot be uniformly applied to the ejection plate 831, the ejection amount of the ejection pin 832 varies due to the strength of the force. Therefore, the ejection force applied to each molded product in order to take out the molded product from a mold varies, and there exists a possibility that a product defect may arise. Especially in compression molding, the deviation of ejection force has a great influence on the product defect.
Therefore, in this embodiment, before the injection molding cycle is performed, the ejector rod 230 is adjusted so that the front end surface 233 of the ejector rod 230 follows the mold mounting surface 121 of the movable platen 120 (see FIGS. 1 and 2). In this embodiment, this adjustment sequence is called an ejector rod adjustment method. Specifically, the front end surface 233 of the ejector rod 230 is pushed to a reference surface 241 (see FIG. 4) parallel to the mold mounting surface 121 of the movable platen 120 to cause plastic deformation. Thereby, the front end surface 233 and the mold mounting surface 121 become parallel, avoiding the partial contact of the ejector rod 230, and the front end surface 233 can evenly contact the mold.
As shown in FIG. 3, the front end portion 232 of the ejector rod 230 in this embodiment in contact with the ejection plate 831 is made of a material different from the base end portion 231 fixed to the ejection device 200 side. The base end portion 231 and the front end portion 232 are fixed by an arbitrary method such as bolts or adhesion.
The material of the front end portion 232 is a material that is softer than the material of the base end portion 231. Here, the term "soft material" means that the yield stress, proof stress, Young's modulus, and the like are small. As described later, when the front end surface 233 is plastically deformed, the ejector lever 230 is pressed against the reference surface 241 with a stronger force than the ejection force. By making the front end portion 232 a softer material than the base end portion 231, it is possible to The front end portion 232 is deformed first to prevent unnecessary bending deformation of the base end portion 231 and the like. As the material of the tip portion 232, for example, a material having good ductility and low guaranteed stress such as aluminum can be used.
The sequence of adjusting the front end surface 233 of the ejector 230 in this manner will be described with reference to FIG. 4. A series of processing shown in FIG. 4 is performed before the injection molding cycle of the injection molding machine 10 is performed.
First, as shown in FIG. 4 (a), a quasi block 240 is attached to the movable platen 120 (installation step). The reference block 240 has a reference surface 241 parallel to the mold mounting surface 121. The reference block 240 is, for example, substantially the same shape as the movable mold 820. The reference block 240 is fixed to the movable platen 120 such that the reference surface 241 is in surface contact with the mold mounting surface 121 and is disposed at a position that blocks the through hole of the movable platen 120 for ejection of the ejector rod 230.
Next, as shown in FIG. 4 (b), the ejection device 200 is operated to move the ejection lever 230 forward, and the front end surface 233 of the ejection lever 230 is pushed against the reference surface 241 to cause plastic deformation (adjustment step) . Thereby, the front end surface 233 of the ejector rod 230 can follow the mold mounting surface 121 of the movable platen 120 so that the front end surface 233 is parallel to the mold mounting surface 121.
Next, as shown in FIG. 4 (c), the ejector lever 230 is retracted and separated from the reference block 240, and the movable die 820 and the reference block 240 are interchanged and fixed to the movable platen 120. After that, the injection molding machine 10 performs an injection molding cycle.
Here, the front end portion 232 of the ejector rod 230 is formed of a soft material to such an extent that it does not plastically deform even if it contacts the mold with the ejection force of the injection molding cycle. In the adjustment step, the force for pressing the front end surface 233 to the reference surface 241 is set to be larger than the ejection force and to a magnitude that the front end portion 232 is plastically deformed. That is, the front end portion 232 of the ejector lever 230 is formed of a material that is plastically deformed by the force pushed to the reference block 240 but not plastically deformed by the ejection force.
In this way, in this embodiment, the ejection rod adjustment method shown in FIG. 4 is implemented, and the adjustment step of making the front end surface 233 of the ejection rod 230 follow the mold mounting surface 121 of the movable platen 120 is performed, thereby enabling the ejection rod 230 The front end surface 233 is parallel to the mold mounting surface 121. Thereby, a partial contact of the ejection lever 230 can be prevented, and the ejection force of a molded product can be made uniform.
If the ejection force applied to each molded product of the mold is made uniform, even when each molded product is removed from the mold, uniformity can also be achieved. Therefore, the occurrence of defects in the molded product can be suppressed, thereby preventing a decrease in manufacturing accuracy. . For example, in the compression molding of lenses and the like used in the manufacture of portable terminals, the ejection pin 832 is used to compress the molding material in the mold to form the mold. Therefore, the deviation of the ejection force of the ejector 230 affects the accuracy of the product. Very big. Therefore, the effect of the ejector rod adjustment method based on this embodiment is particularly significant in compression molding.
In the present embodiment, the aforementioned adjustment step is achieved by pressing the front end surface 233 of the ejector rod 230 to a reference surface 241 parallel to the mold mounting surface 121 of the movable platen 120 to cause plastic deformation. Thereby, once the direction of the front end surface 233 is adjusted, it will not be restored. Therefore, the direction of the front end surface 233 can be reliably maintained, and the ejection of the molded product can be performed stably.
In the present embodiment, a reference block 240 attached to the movable platen 120 is used as a reference surface 241 for processing the front end surface 233 of the ejector rod 230. Since the reference block 240 is provided on the mold mounting surface 121 of the movable platen 120 in the same manner as the movable mold 820, the reference surface 241 and the mold mounting surface 121 can be easily and reliably made parallel. Thereby, the direction of the front end surface 233 of the ejector rod 230 after the direction is adjusted by the reference surface 241 can be easily and surely parallel to the mold mounting surface 121.
In this embodiment, the front end portion 232 of the ejector rod 230 is made of a material that is softer than the base end portion 231. However, the entire ejector rod 230 may be formed of the same material.

(Modification of ejector adjustment method)
Next, a modification will be described with reference to FIGS. 5 and 6. FIG. 5 is a view showing an ejector lever 230A according to a modification. FIG. 6 is a diagram schematically illustrating a direction adjustment procedure of a front end surface 233 of the ejector lever 230A using an ejector lever 230A according to a modification. 5 (a) is a side view of the vicinity of the front end portion 232 of the ejector lever 230A. FIG. 5 (b) is a cross-sectional view taken along the line AA in FIG. 5 (a), and is a diagram showing an example of the configuration of the adjustment section 234.
In a modification, the ejector lever 230A includes an adjustment portion 234 capable of adjusting the direction of the front end surface 233. For example, as shown in FIG. 5 (a), the adjustment portion 234 includes a ball joint 235 disposed on the base end side more than the front end surface 233. The rotation of the ball joint 235 can arbitrarily change the front end surface with respect to the base end portion 231. 233 direction.
In addition, the adjustment unit 234 can fix the direction of the front end surface 233 to a predetermined direction. The fixing method can adopt any well-known structure. For example, as shown in FIG. 5 (b), it can be configured to have a substantially C-shaped outer peripheral portion 236 extending along the circumferential direction of the ball joint 235 and having a gap 236A at one place. And the configuration of the bolt 237 of the gap 236A capable of expanding and contracting the outer peripheral portion 236. The gap 236A of the outer peripheral portion 236 is reduced by tightening the bolt 237, so that the outer peripheral portion 236 and the ball joint 235 are firmly in contact with each other, the movement of the ball joint 235 can be restricted, and the front end portion 232 can be fixed to the base end portion 231. . Thereby, the direction of the front end surface 233 can also be fixed (see FIG. 6 (c)).
The sequence of adjusting the front end surface 233 of the ejector 230A in this manner will be described with reference to FIG. 6. A series of processing shown in FIG. 6 is performed before the injection molding cycle of the injection molding machine 10 is performed.
First, as shown in FIG. 6 (a), the reference block 240A is attached to the movable platen 120 (installation step). In the reference block 240A, a part of the surface in contact with the mold mounting surface 121 including a portion blocking the through hole of the movable platen 120 is excavated, and the bottom surface of the excavated portion becomes the reference surface 241A. The reference surface 241A is formed parallel to the mold mounting surface 121 of the movable platen 120.
Next, as shown in FIG. 6 (b), the ejection device 200 is operated to move the ejection lever 230A forward, and the front end surface 233 of the ejection lever 230A is pushed to the reference surface 241A, and the front end is adjusted by the adjustment portion 234. Orientation of the face 233 (adjustment step). Thereby, the front end surface 233 of the ejector rod 230A can follow the mold mounting surface 121 of the movable platen 120 so that the front end surface 233 is parallel to the mold mounting surface 121.
Next, as shown in FIG. 6 (c), the adjustment portion 234 is fixed by fastening with the bolt 237, and the direction of the front end surface 233 of the ejection lever 230A is fixed. Thereby, the front-end surface 233 and the mold mounting surface 121 are kept parallel. The bolt 237 can be tightened by, for example, providing a hole in the reference block 240A and inserting the bolt 237 into the reference block 240A from the hole.
Thereafter, as shown in FIG. 6 (d), the ejector lever 230A retracts and separates from the reference block 240A, and the movable die 820 and the reference block 240A are interchanged and fixed to the movable platen 120. After that, the injection molding machine 10 performs an injection molding cycle.
In this way, even if the ejector lever 230A of the modified example is used, as long as the ejector lever adjustment method shown in FIG. 6 is implemented, the front end face 233 of the ejector lever 230A can be made parallel to the mold mounting surface 121 as in the above embodiment, thereby preventing Partial contact of the ejector lever 230A achieves uniform ejection force of the molded product.
The present embodiment has been described with reference to specific examples. However, the present invention is not limited to those specific examples. Those skilled in the art who appropriately design and modify these specific examples also fall within the scope of the present invention as long as they have the features of the present invention. The requirements, the arrangement, the conditions, the shape, and the like included in each of the specific examples are not limited to those exemplified, and can be appropriately changed. As long as there is no technical contradiction in each of the requirements of the specific examples, the combination can be appropriately changed.
In the above embodiment, as the reference surface for adjusting the direction of the front end surfaces 233 of the ejector rods 230 and 230A, the reference surfaces 241 and 241A of the reference blocks 240 and 240A mounted on the movable platen 120 are used. Outside the datum.
The front end surface 233 of the ejector rod 230 only needs to be finally parallel to the mold mounting surface 121 of the movable platen 120, and the adjustment method may be a method other than the above. For example, the front end surface 233 of the ejector rod 230 may be ground or cut so as to be parallel to the mold mounting surface 121.

10‧‧‧射出成形機10‧‧‧ Injection molding machine

120‧‧‧活動壓板 120‧‧‧ movable platen

121‧‧‧模具安裝面 121‧‧‧Mould mounting surface

230、230A‧‧‧頂出桿 230, 230A‧‧‧ ejector

231‧‧‧基端部 231‧‧‧base end

232‧‧‧前端部 232‧‧‧Front end

233‧‧‧前端面 233‧‧‧front face

234‧‧‧調整部 234‧‧‧ Adjustment Department

240、240A‧‧‧基準塊 240, 240A‧‧‧ benchmark block

241、241A‧‧‧基準面 241, 241A‧‧‧ datum

820‧‧‧活動模 820‧‧‧Activity mode

831‧‧‧頂出板 831‧‧‧ Top plate

832‧‧‧頂出銷 832‧‧‧ Top Out

圖1係表示一實施形態之射出成形機的開模結束時的狀態之圖。FIG. 1 is a diagram showing a state at the end of mold opening of an injection molding machine according to an embodiment.

圖2係表示一實施形態之射出成形機的合模時的狀態之圖。 Fig. 2 is a view showing a state of the injection molding machine according to the embodiment when the mold is closed.

圖3係本實施形態之頂出桿的立體圖。 FIG. 3 is a perspective view of an ejector lever according to this embodiment.

圖4(a)~(c)係表示本實施形態之頂出桿調整方法的頂出桿之前端面的方向調整順序的概略圖。 4 (a)-(c) are schematic diagrams showing a direction adjustment sequence of a front end face of the ejector lever in the ejector lever adjustment method of the present embodiment.

圖5(a)~(b)係表示變形例之頂出桿的立體圖。 5 (a)-(b) are perspective views showing ejector rods according to a modification.

圖6(a)~(d)係使用了變形例之頂出桿的頂出桿之前端面的方向調整順序的概略圖。 Figs. 6 (a) to (d) are schematic diagrams of a direction adjustment sequence of the front end face of the ejector lever using the ejector lever according to the modification.

Claims (5)

一種射出成形機的頂出桿調整方法， 該射出成形機係具備：壓板，供安裝模具；及 頂出桿，進退自如地配設於前述壓板之貫通孔，且從前述模具頂出成形品， 使前述頂出桿之前端面依循前述壓板的模具安裝面。Method for adjusting ejector rod of injection molding machine, The injection molding machine is provided with: a pressure plate for mounting a mold; and The ejector rod is freely arranged in the through hole of the pressure plate, and the formed product is ejected from the mold. The front end surface of the ejector rod follows the mold mounting surface of the pressing plate. 如申請專利範圍第1項所述之射出成形機的頂出桿調整方法，其中， 將前述前端面推壓到與前述模具安裝面平行的基準面而使其產生塑性變形。The ejector adjustment method for an injection molding machine as described in item 1 of the patent application scope, wherein: The front end surface is pushed to a reference plane parallel to the mold mounting surface to cause plastic deformation. 如申請專利範圍第2項所述之射出成形機的頂出桿調整方法，其中， 前述頂出桿的前端部是由比基端部柔軟的材料形成。The ejector adjustment method of the injection molding machine as described in the second item of the patent application scope, wherein: The front end portion of the ejector is formed of a material softer than the base end portion. 如申請專利範圍第1項所述之射出成形機的頂出桿調整方法，其中， 前述頂出桿具有能夠調整前端面的方向的調整部， 將前述前端面推壓到與前述模具安裝面平行的基準面，並藉由前述調整部調整前述前端面的方向。The ejector adjustment method for an injection molding machine as described in item 1 of the patent application scope, wherein: The ejector has an adjusting portion capable of adjusting the direction of the front end surface, The front end surface is pushed to a reference plane parallel to the mold mounting surface, and the direction of the front end surface is adjusted by the adjustment section. 如申請專利範圍第1至4項中任一項所述之射出成形機的頂出桿調整方法，其中， 將具有與前述模具安裝面平行的基準面的基準塊安裝於前述壓板， 將前述頂出桿之前端面推壓到前述基準面而使其依循前述壓板的模具安裝面。The ejector adjustment method for an injection molding machine according to any one of the claims 1 to 4, wherein: Mounting a reference block having a reference plane parallel to the mold mounting surface to the pressure plate, The front end surface of the ejector is pushed to the reference surface to make it follow the mold mounting surface of the pressing plate.