201132427 六、發明說明： 【發明所屬之技術領域】 本發明係關於脫脂（degreasing)方法。 本發明，係根據2009年12月28日向曰本所提出申請 之特願2009-297251號而主張優先權，並將其内容援用於 此。 【先前技術】 於燒結（sintering)處理中，對粉末原料混練臘(wax)、 膠黏劑(binder)等有機黏合劑（organic binder)後將其成型為 預定形狀之粉末成型品進行加熱，以去除該粉末成型品中 所含之膠黏劑（脫脂處理），然後，再升高爐内溫度而使其 燒結以製得最終製品。以實施此種燒結處理之加熱爐而 言’可例舉：下述專利文獻1中所記載之脫脂燒結爐。 [先前技術文獻] [專利文獻] [專利文獻1]日本特開2000-17305號公報 【發明内容】 [發明所欲解決之課題] 然而，此種粉末成型品係多採用小物件大量處理之方 式者’一般慣例的作法，為如專利文獻1所記載，將此等 小物件排列、收納於由搁板構造(shelf structure)所成内箱 中並裝入爐内。為達成粉末成型品的均質化，需要使全部 粉末成型品的溫度升溫為相同程度以進行脫脂處理，惟因 在爐内之配置位置’例如相對於加熱器之位置的不同而會 322646 201132427 產生内箱外侧與中〜側的溫度差，以致於粉末成型品之間 產生溫度差。當於粉末成型品之間產生溫度差時，則完成 脫脂之時时有不同以致製品的料(―此⑽)之程 度會有變化，而發生品質之落差(dispersi〇n)。再者，為了 降低粉末賴品狀溫度差，雖有使爐内溫度緩慢升溫之 手法，惟由於至開始脫脂處理需要較長時間故效率不佳。 又’不僅此種製品間的落差，即使在進行2個大型的 粉末成型品之職處理之㈣，若在錄末成型品的各部 分之間發生溫度差’朗樣地在各部分之間會發生 的落差。 本發明係鑑於前關題·發者，以提供_種能降低 各製品之間的品質落差以及一製品的各部分之間的品質落 差之粉末成型品的脫脂方法為目的。χ，作為第2目，本 發明亦以提供-種能脑處理㈣之脫脂方法為目的。 [用以解決課題之手段] 為解決前述課題’本發明係採用下述手法。亦即， ⑴本發明為—種脫脂方法，係於爐内將1個或複數個 粉末成义型品中所含之有機黏合劑進行加熱而脫脂者，其具 有:將前雜内溫度魏前財絲合㈣發(vajwizati〇n) 之蒸發溫度為高，而較前述粉末成型品渗碳之溫度為低的 範圍内保持預定時間之保持工序。 本發明中’由於在保持工序中，將爐内溫度保持預定 時間’故可抑制粉末成型品之間或―個粉末成型品的各部 刀之間的咖度差之擴大’並可藉由於爐内之熱傳導而緩和 322646 4 201132427 該溫度差。又，於保持工序中，藉由將爐内溫度作成為較 有機黏合劑的蒸發溫度為高的溫度，而可確實地使有機黏 合劑從粉末成型品蒸發，且藉由作成為較因有機黏合劑蒸 發後所產生之氣體而產生之滲碳之溫度為低的溫度，而^ 抑制粉末成型品的產生滲碳。 (2)别述(1)所記載之脫脂方法，亦可具有依據前述有機 黏合劑的蒸發特性’而調節前述保持工序的時間之調節工 序。 藉由採用此種手法’本發明即可對應於有機黏合劑& 固體差、或粉末成型品之間的升溫速度差，而可於粉末i 型品之間實現均等的脫脂。 ⑶前述（1)或（2)所記載之脫脂方法，係可於前述灌 内’在至少互相不同的位置配置有第1粉末成型品及第： 粉末成型品，且可具有計測前述第1粉末成型品的溫度之 第，1計測H計測前述第2粉末成型品的溫度之第： 计測工序’並可具有在前述第丨計測卫序及前述第2計调 工序中之制結果均相前述蒸發溫度之前，將前述爐内 溫度於前述蒸發溫度保持敗時間之第2保持工序。 藉由採用此種方法，在本發明中，於第i粉末成型品 及第2粉末成型品均到達有機黏合劑的蒸發溫度為止之 間，將爐内溫度保持在該有機黏合劑的蒸發溫度，藉此於 將粉末成型品之間的溫度作成略均等之後，作成能在保持 工序中開始溫度的升溫之狀態。因此，即使在保持工序中 的溫度與有機黏合劑的蒸發溫度之間的溫度差較大之情201132427 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a degreasing method. The present invention claims priority based on Japanese Patent Application No. 2009-297251, filed on Dec. 28, 2009. [Prior Art] In a sintering process, an organic binder such as a wax or a binder is kneaded in a powder raw material, and then molded into a powder molded article of a predetermined shape and heated. The adhesive contained in the powder molded article is removed (degreasing treatment), and then the temperature in the furnace is raised to be sintered to obtain a final product. In the case of the heating furnace which performs such a sintering process, the degreasing sintering furnace described in the following patent document 1 is mentioned. [PRIOR ART DOCUMENT] [Patent Document 1] JP-A-2000-17305 [Summary of the Invention] [Problems to be Solved by the Invention] However, such a powder molded product is often treated in a large amount by small objects. As a general practice, as described in Patent Document 1, these small objects are arranged and housed in an inner box formed by a shelf structure and placed in a furnace. In order to achieve homogenization of the powder molded product, it is necessary to raise the temperature of all the powder molded articles to the same extent for degreasing treatment, but the position in the furnace is set to, for example, 322646 201132427 depending on the position of the heater. The temperature difference between the outer side of the tank and the middle to the side is such that a temperature difference occurs between the powder molded articles. When a temperature difference occurs between the powder molded articles, the degree of completion of the degreasing is different so that the degree of the material ("(10)) of the product changes, and the quality difference occurs (dispersi〇n). Further, in order to reduce the temperature difference of the powder, there is a method of slowly raising the temperature in the furnace, but it is inefficient because it takes a long time to start the degreasing treatment. In addition, not only the difference between the products, but also the temperature difference between the parts of the finished molded article, even if the two large powder molded products are processed (4), The gap that occurred. SUMMARY OF THE INVENTION The present invention has been made in view of the former issue and the present invention to provide a degreasing method for a powder molded article which can reduce the quality difference between the products and the quality difference between the respective portions of a product. χ, as the second item, the present invention also aims to provide a degreasing method for the brain treatment (four). [Means for Solving the Problem] In order to solve the above problems, the present invention employs the following method. That is, (1) the present invention is a degreasing method in which one or a plurality of organic binders contained in a powder-formed type product are heated and degreased in a furnace, and the method has the following advantages: The evaporating temperature of the (four) hair (vajwizati〇n) is high, and the holding step is maintained for a predetermined time in a range in which the temperature of carburization of the powder molded product is low. In the present invention, "the temperature in the furnace is maintained for a predetermined time in the holding step", thereby suppressing the expansion of the difference in the difference between the powder molded articles or the respective blades of the powder molded article, and by the furnace The heat conduction is moderated by 322646 4 201132427 The temperature difference. Further, in the holding step, by setting the temperature in the furnace to a temperature higher than the evaporation temperature of the organic binder, the organic binder can be surely evaporated from the powder molded article, and the organic binder is more organically bonded. The temperature of the carburization generated by the gas generated after the evaporation of the agent is a low temperature, and the carburization of the powder molded article is suppressed. (2) The degreasing method according to (1), which may have a step of adjusting the time of the holding step in accordance with the evaporation characteristic of the organic binder. By adopting such a method, the present invention can achieve equal degreasing between powder i-type products in accordance with the organic binder/amp; solid difference or the difference in temperature rise rate between powder molded articles. (3) The degreasing method according to the above (1) or (2), wherein the first powder molded article and the first powder molded article are disposed at at least mutually different positions in the filling, and the first powder may be measured The temperature of the molded article is the first, the first measurement H measures the temperature of the second powder molded article: the measurement step ′, and the results of the measurement in the second measurement step and the second measurement step are uniform. Before the evaporating temperature, the second holding step of maintaining the temperature in the furnace at the evaporating temperature is maintained. According to the present invention, in the present invention, the temperature in the furnace is maintained at the evaporation temperature of the organic binder between the time when the i-th powder molded article and the second powder molded article reach the evaporation temperature of the organic binder. Thereby, after the temperature between the powder molded articles is slightly equalized, a state in which the temperature rise can be started in the holding step. Therefore, even if the temperature difference between the temperature in the holding process and the evaporation temperature of the organic binder is large,
S 322646 201132427 形，仍然能在粉末成型品之間使有機黏合劑被均等脫脂， 且可抑制因有機黏合劑蒸發後所產生之氣體引起之粉末成 型品的產生滲碳。 (4) 前述（1)或(2)所記載之脫脂方法，可具有計測前述 粉末成型品的第1位置溫度之第1計測工序、及計測與該 粉末成型品的前述第1位置不同的第2位置的溫度之第2 計測工序，並可具有在前述第1計測工序及前述第2計測 工序中的計測結果均達到前述蒸發溫度之前，將前述爐内 溫度於前述蒸發溫度保持預定時間之第2保持工序。 藉由採用此種手法，在本發明中，於丨個粉末成型品 中第1位置的部分及第2位置的部分均成為有機黏合劑的 蒸發溫度為止之間，以該蒸氣溫度保持爐内的溫度，藉此 在將1個粉末成型品的各部分間的溫度作成略均等之後， 作成能在保持工序中開始溫度的升溫之狀態。因此，即使 在保持工序中的溫度與有機黏合劑的蒸發溫度之間的溫度 差較大之If开），仍然能在丨個粉末成型品的部分之間使有 機黏合劑破均等脫脂’且可抑個有機黏合㈣發後所發 生之氣體引起之粉末成型品的產生滲碳。 (5) 别述(3)或（4)所記載之脫脂方法，亦可具有在轉進 至則述第2保持工序之前，使前述爐内的溫度升溫至前述 蒸發溫度以上之升溫工序。 藉由採用此種手法，在本發明中，當升高爐内溫度時， 則可加^末成型品的升溫速度’故可縮短處理時間。 ()】过》(1)至（5)所§己載之脫脂方法，亦可具有調節前 322646 6 201132427 述爐内的氛圍壓力之壓力調節工序。 藉由採用此種手法’在本發明中，當升高爐内的氛圍 壓力時會增高對粉末成型品的傳熱性，故可縮短處理時間。 [發明之效果] 本發明，係一種於爐内中，將1個或複數個粉末成型 品中所含之有機黏合劑進行加熱並脫脂之脫脂方法，其可 降低粉末成型品的每件製品之品質落差以及丨個製品的各 部分的品質落差，且能縮短粉末成型品的處理時間。 【實施方式】 以下，在參照圖式之下，就本發明之實施形態中之脫 脂方法加以說明。在此，於下述說明中，舉例說明，將為 使用臘作為有機黏合劑混練於粉末原料中而作成粉末成梨 品之情形。 第1圖，係表示本發明實施形態中之脫脂爐丨的構成 圖。 脫脂爐(degreasing furnace)〗中，在減壓真空氛圍下將 本身為含有臘（有機黏合劑）之粉末成型品之處理品W予以 加熱，藉以去除（脫脂處理）該處理品W中所含之臘，然後， 再升高爐内溫度以使處理品W燒結而製得製品。脫脂爐 1 ’係以即使爐内的壓力狀態改變之情形仍能耐受該壓力之 方式，具有由經設定形成為略圓筒形之真空容器所成之爐 體(furnace)2。於爐體2中，設置有未圖示之水冷套管（Water cooling jacket)，以防止爐體2的溫度過度升高。 於爐體2内’設置有收納複數個處理品W之收納擱板S 322646 201132427 shape, the organic binder can be uniformly degreased between the powder molded articles, and the carburization of the powder molded article caused by the gas generated by the evaporation of the organic binder can be suppressed. (4) The degreasing method according to the above (1) or (2), the first measurement step of measuring the first position temperature of the powder molded article, and the measurement of the first position different from the first position of the powder molded article In the second measurement step of the temperature of the second position, the furnace temperature may be maintained at the evaporation temperature for a predetermined time before the measurement results in the first measurement step and the second measurement step are both at the evaporation temperature 2 keep the process. According to the present invention, in the present invention, the portion of the first position and the portion of the second position in the powder molded article are both between the evaporation temperatures of the organic binder, and the vapor temperature is maintained in the furnace. By setting the temperature between the respective portions of the one powder molded article to be slightly uniform, the temperature can be raised in the holding step. Therefore, even if the temperature difference between the temperature in the holding step and the evaporation temperature of the organic binder is large, the organic binder can be uniformly degreased between the portions of the powder molded article. Inhibition of organic carbonization (4) carburization caused by gas generated after the hair is produced. (5) The degreasing method described in (3) or (4) may further include a temperature increasing step of raising the temperature in the furnace to a temperature equal to or higher than the evaporation temperature before the second holding step. By adopting such a method, in the present invention, when the temperature in the furnace is raised, the temperature increase rate of the molded article can be increased, so that the treatment time can be shortened. ()] The degreasing method contained in (1) to (5) may also have a pressure adjustment process in which the atmospheric pressure in the furnace is adjusted before 322646 6 201132427. By adopting such a method, in the present invention, when the atmospheric pressure in the furnace is increased, the heat transfer property to the powder molded article is increased, so that the treatment time can be shortened. [Effects of the Invention] The present invention relates to a degreasing method for heating and degreasing an organic binder contained in one or a plurality of powder molded articles in a furnace, which can reduce each product of the powder molded article. The quality difference and the quality difference of each part of the product can be shortened, and the processing time of the powder molded product can be shortened. [Embodiment] Hereinafter, a degreasing method in an embodiment of the present invention will be described with reference to the drawings. Here, in the following description, a case where a wax is used as an organic binder and kneaded in a powder raw material to form a powder into a pear product is exemplified. Fig. 1 is a view showing the configuration of a degreasing furnace in an embodiment of the present invention. In a degreasing furnace, a treated product W which is a powder molded article containing a wax (organic binder) is heated under a reduced pressure vacuum atmosphere to remove (degreasing treatment) the contained in the treated product W. After the wax is heated, the temperature in the furnace is further raised to sinter the treated product W to obtain a product. The degreasing furnace 1' has a furnace 2 formed of a vacuum vessel which is set to have a substantially cylindrical shape even if the pressure in the furnace is changed to withstand the pressure. A water cooling jacket (not shown) is provided in the furnace body 2 to prevent the temperature of the furnace body 2 from rising excessively. A storage shelf for accommodating a plurality of processed articles W is provided in the furnace body 2
S 7 322646 201132427 (storage shelf)3、圍繞收納搁板3之蒙孚爐(muffle)4、透過 蒙妥爐4加熱處理品W之加熱器（heater)4、以及圍繞蒙妥 爐4及加熱器5之隔熱室（adiabatic chamber)6。又，對爐 體2，連接有對爐體2内供給載體氣體(carrier gas)之載體 氣體供給系7、控制爐内氛圍壓力之主排氣系8、以及排出 在蒙孚爐4内所產生之臘蒸氣(wax vapor)之脫脂排氣系 9。脫脂爐1，具有控制前述各構成機器之驅動之控制裝置 (control apparatus)(未圖示）。 收納擱板3，具有具備收納複數個處理品W之複數 層之搁板構造。收納擱板3，係以對複數個處理品W形成 傳熱加熱器（heater)5的熱之熱傳導路徑之方式發揮功能。 於升溫速度最快速之收納擱板3的角落部，設置有用以計 測經配置於該角落部之處理品（第1粉末成型品)W1的溫度 之溫度感測器（temperature sensor)51。又，於升溫速度最缓 慢之收納搁板3中央部，設置有用以計測經配置於收納搁 板3中央部之處理品（第2粉末成型品)W2的溫度之溫度感 測器52。溫度感測器51、52的計測結果，係傳輸至控制 裝置。作為溫度感測器51、52，在此雖採用熱電偶 (thermocouple) ’惟例如’亦可採用如輻射溫度計之類的非 接觸式感測器以計測溫度。 再者’本實施形態中，係就收納複數個處理器W之情 形加以說明者，惟如處理品W為1個的情形，則只要準備 適合於收納1個處理品w之收納搁板即可。 又’就溫度感測器51、52而言，亦以能分別計測1 8 322646 201132427 個處理品w的不相同部分（第i位置、第2位置）的溫度之 方式適當加以配置。 加熱器5,係於箱形的蒙孚爐4上下，以成對之方式 T置。加熱器5 ’係、將蒙孚爐4實純射加熱，藉由從蒙 手爐4所傳出之熱而間接性地加熱處理品w。加熱器$的 μ度(爐内的溫度），則由控制裝置所管理。 為隔熱至6，採用例如，石墨絨如叩咖或陶究 絨(⑽mic wool)等絨(w〇〇1)系的隔熱材料。隔熱室6係箱 形’而以包圍蒙孚爐4及加熱H5的外側之方式設置。 載體氣體供給系7，具有以能對爐體2内供給載體氣 體之方式所配官之載體氣體供給管線71。從載體氣體供給 系7所供給之載體氣體，係由氮氣、氬氣或氦氣、或此等 的混合氣體等惰性氣體所成。又，於載體氣體供給系7中， 設置有能計測爐體2内的氛圍壓力之未圖示的壓力感測 器。壓力感測器的計測結果，係傳輸至控制裝置。 #主排氣系8，具有以能從蒙孚爐4之外吸氣之方式所 配管之，排氣管線8卜於主排氣管線81。於主排氣管線 81上，設置有機械式泵（mechanical pump) 82、旋轉式泵 83 〇 7 機械式系82及旋轉式泵83，係在控制裝置的控制之 下’對應於蒙孚爐4内部之減塵、真空氛圍的程度而以串 聯方式驅動、或單機方式驅動。χ，於主排氣系8，設置 有能㈣蒙孚爐4内部的氛Μ力之未圖示㈣力感測 器。壓力感測器的計測結果，則傳輸至控制裝置。S 7 322646 201132427 (storage shelf) 3, a muffle 4 surrounding the storage shelf 3, a heater 4 for heat-treating the treated product W through the furnace 4, and a surrounding furnace 4 and a heater 5 adiabatic chamber 6. Further, the furnace body 2 is connected to a carrier gas supply system 7 for supplying a carrier gas to the furnace body 2, a main exhaust system 8 for controlling the atmospheric pressure in the furnace, and a discharge to be generated in the Monfort furnace 4. The degreasing exhaust system of wax vapor. The degreasing furnace 1 has a control apparatus (not shown) that controls the driving of each of the above-described constituent machines. The storage shelf 3 has a shelf structure having a plurality of layers that accommodate a plurality of processed articles W. The storage shelf 3 functions to form a heat conduction path of heat of the heat transfer heater 5 for a plurality of processed products W. A temperature sensor 51 for measuring the temperature of the processed product (first powder molded article) W1 disposed at the corner portion is provided at a corner portion of the storage shelf 3 which has the fastest heating rate. In addition, a temperature sensor 52 for measuring the temperature of the processed product (second powder molded article) W2 disposed in the central portion of the storage shelf 3 is provided at the center of the storage shelf 3 where the temperature rise rate is the slowest. The measurement results of the temperature sensors 51, 52 are transmitted to the control device. As the temperature sensors 51, 52, a thermocouple is used, however, for example, a non-contact sensor such as a radiation thermometer can be used to measure the temperature. In the present embodiment, the case where a plurality of processors W are accommodated is described. However, if the number of processed articles W is one, it is sufficient to prepare a storage shelf suitable for storing one processed article w. . Further, the temperature sensors 51 and 52 are also appropriately arranged so as to be able to measure the temperatures of the different portions (i-th position, second position) of the processed products w of 1 8 322646 201132427, respectively. The heater 5 is attached to the box-shaped Monfort furnace 4 and placed in pairs in a pair. The heater 5' is heated by the purely blast furnace 4, and the treated product w is indirectly heated by the heat transmitted from the oven 4. The μ degree of the heater (temperature in the furnace) is managed by the control unit. For heat insulation to 6, a velvet (w〇〇1) type heat insulating material such as graphite velvet or quilt is used. The heat insulating chamber 6 is box-shaped and is provided to surround the outside of the monsoon furnace 4 and the heating H5. The carrier gas supply system 7 has a carrier gas supply line 71 that is capable of supplying a carrier gas to the inside of the furnace body 2. The carrier gas supplied from the carrier gas supply system 7 is made of an inert gas such as nitrogen gas, argon gas or helium gas or a mixed gas thereof. Further, in the carrier gas supply system 7, a pressure sensor (not shown) capable of measuring the atmospheric pressure in the furnace body 2 is provided. The measurement result of the pressure sensor is transmitted to the control device. The #main exhaust system 8 has a pipe that can be sucked from outside the Monfort furnace 4, and the exhaust line 8 is connected to the main exhaust line 81. On the main exhaust line 81, a mechanical pump 82, a rotary pump 83 〇7 mechanical system 82 and a rotary pump 83 are provided under the control of the control device, corresponding to the Mengfu furnace 4 The internal dust reduction and vacuum atmosphere are driven in series or in a single machine. χ In the main exhaust system 8, there is an unillustrated (four) force sensor capable of (4) the internal force of the Monfort furnace 4. The measurement result of the pressure sensor is transmitted to the control device.
S 322646 9 201132427 脫脂排氣系9，具有以能吸氣蒙孚爐4内部所產生之 臘蒸氣之方式所配管之脫脂排氣管線91。於脫脂排氣管線 91，設置有臘阱(waxtrap)92。臘阱92,係藉由冷卻臘蒸氣 而回收臘。 又，脫脂排氣管線91，係經由旁路管線93而與主排 氣管線81相連接，而來自脫脂排氣系9的臘蒸氣的吸氣作 業，則藉由旋轉式泵83之驅動而實施。 接著，在參照第2圖之下，就採用前述構成的脫脂爐 1之處理品W的脫脂方法加以說明。 第2圖係為用以說明本發明之第1實施形態中之脫脂 方法的圖表。於第2圖中，縱軸表示溫度、橫軸表示時間。 又，於第2圖中，實線表示爐内（加熱器5)的溫度變化、 虛線表示處理品W1的溫度變化、一點鏈線表示處理品 W2的溫度變化。 首先，藉由主排氣系8,而於蒙孚爐4内部形成真空 氛圍，如第2圖所示，此時的臘的蒸發點（蒸發溫度)Tv成 為約260°C。 於步驟S1中，使加熱器5通電，以使爐内溫度從常 溫升溫至臘的蒸發點Tv。此時，於處理品W1與處理品 W2之間，因配置位置的不同而傳熱的程度不相同，以致 產生溫度差。 其次，於步驟S2中，在溫度感測器51、52的計測結 果在均到達蒸發點Tv之前，將爐内溫度，在蒸發點Tv之 下保持既定時間（第2保持工序）。 10 322646 201132427 於此步驟S2中，處理品W1及處理品w2在均到達臘 的蒸發點Tv近旁為止之間，將爐内溫度保持於蒸發點 Tv。藉此，將處理品w間的溫度作成略均等之結果，可作 成能開始朝進行脫脂處理之步驟S3中所設定的溫度之升 脈之狀態。因此，即使在步驟S3中的處理品w的溫度與 臘的蒸發點Tv之_溫度差較大的情形，仍能在處理品 之門使臘均4加以脫脂。又，亦能事前防止處理品w的 溫度急激上升以致碳化之情況。本實施形態的步驟s2，係 當感測器51、52的計測結果均到達達溫度T3(T3=Tv_2〇 C)之適當時間時’則加以終止。 其次，於步驟S3中，將爐内溫度，在較臘會蒸發之 蒸發點Tv為高、較臘會碳化之碳化溫度為低的範圍内保 持預定時間（保持工序）。 於此步驟S3中，將爐内的溫度保持預定時間之結果， 可抑制處理品W之間的溫度差的擴大，並藉由爐内之熱傳 導而緩和其溫度差之下進行脫脂。 再者’於步驟S3中’當處理品W1及處理品W2的溫 度到達T3後，實施將爐内的溫度緩升溫為保持(keep)溫度 T2(T2=Tv+3〇C)止之缓升溫度處理、及以保持溫度T2伴 持爐内的溫度之保持處理。 於步驟S3中，將爐内溫度作成較臘的蒸發點τν為高 的溫度，而藉此可確實地使臘從處理品W蒸發。如將爐内 溫度升溫至臘的蒸發點Tv止’則通常，臘會蒸發。然而， 由於臘的固體差、或處理品w之間的升溫狀況的差異等之S 322646 9 201132427 The degreasing and exhaust system 9 has a degreasing exhaust line 91 which is configured to be capable of inhaling the wax vapor generated inside the Monfort furnace 4. On the degreasing exhaust line 91, a wax trap 92 is provided. The wax trap 92 recovers the wax by cooling the wax vapor. Further, the degreasing exhaust line 91 is connected to the main exhaust line 81 via the bypass line 93, and the suction operation of the wax vapor from the degreasing exhaust system 9 is performed by the driving of the rotary pump 83. . Next, the degreasing method of the treated product W of the degreasing furnace 1 having the above configuration will be described with reference to Fig. 2 . Fig. 2 is a chart for explaining the degreasing method in the first embodiment of the present invention. In Fig. 2, the vertical axis represents temperature and the horizontal axis represents time. Further, in Fig. 2, the solid line indicates the temperature change in the furnace (heater 5), the broken line indicates the temperature change of the treated product W1, and the one-dot chain line indicates the temperature change of the treated product W2. First, a vacuum atmosphere is formed inside the Monfort furnace 4 by the main exhaust system 8, and as shown in Fig. 2, the evaporation point (evaporation temperature) Tv of the wax at this time is about 260 °C. In step S1, the heater 5 is energized to raise the temperature inside the furnace from the normal temperature to the evaporation point Tv of the wax. At this time, the degree of heat transfer between the treated product W1 and the treated product W2 is different depending on the arrangement position, so that a temperature difference occurs. Next, in step S2, before the measurement results of the temperature sensors 51 and 52 reach the evaporation point Tv, the furnace temperature is maintained for a predetermined time under the evaporation point Tv (second holding step). 10 322646 201132427 In the step S2, the treated product W1 and the treated product w2 maintain the furnace temperature at the evaporation point Tv until both of them reach the evaporation point Tv of the wax. As a result, the temperature between the processed products w is slightly equalized, and the state in which the temperature of the temperature set in the step S3 of the degreasing process can be started can be obtained. Therefore, even if the temperature difference between the temperature of the treated product w and the evaporation point Tv of the wax is large in the step S3, the wax 4 can be degreased at the door of the treated product. Further, it is also possible to prevent the temperature of the treated product w from rising rapidly to cause carbonization. The step s2 of the present embodiment is terminated when the measurement results of the sensors 51 and 52 reach an appropriate time up to the temperature T3 (T3 = Tv_2 〇 C). Next, in the step S3, the temperature in the furnace is maintained at a higher temperature than the evaporation point Tv at which the wax is evaporated, and is kept lower than the carbonization temperature at which the wax is carbonized (holding step). In the step S3, as a result of maintaining the temperature in the furnace for a predetermined period of time, the temperature difference between the treated articles W can be suppressed from expanding, and the temperature difference can be relaxed by the heat conduction in the furnace to perform degreasing. In addition, in step S3, when the temperature of the treated product W1 and the treated product W2 reaches T3, the temperature in the furnace is gradually raised to a hold temperature (T2 = Tv + 3 〇 C). The temperature treatment and the holding process of maintaining the temperature in the furnace at a temperature T2 are maintained. In the step S3, the temperature in the furnace is made higher than the evaporation point τν of the wax, whereby the wax can be surely evaporated from the treated product W. If the temperature in the furnace is raised to the evaporation point Tv of the wax, the wax will generally evaporate. However, due to the difference in solids of the wax or the difference in temperature rise between the treated products w, etc.
S 322646 11 201132427 故，如爐内溫度鱗於蒸發點Tv，料發生齡蒸發之部 分及不會蒸發之部分。因此，於太眚 於本實苑形態中，於步驟S3 中，以較蒸發點Tv為稍高的溫度保持爐内的溫度，藉以 使臘確實蒸發。 又，於步驟S3中，於較處理品w會渗碳之溫度為低 之保持溫度T2維持爐内的溫度，藉以抑制處理品 生滲碳。在此，處理品W的滲碳溫度，係由臘的種類與爐 内壓力而決定者。本實施形態的處理的渗碳溫度，係 例如較蒸發點Tv為約高5代的溫度。保持溫度^，㈣ 成較蒸發點Tv為高的溫度，惟如作成過高的溫度時，則 處理品w會被滲碳’如鱗溫度T2過於靠近蒸發點Τν 的情形，則有臘不能完全蒸發之可能^在考慮此點之下， 保持溫度Τ2，係作成Τν+約30°C。 在此，嚴的蒸發，雖然在緩升溫處理中大致可完成， 惟臘的蒸發特性有個別差。因此，在緩升溫處理後，不一 疋能從處理品W完全去除臘。對此，為調節步驟S3的時 間’在步驟S3完成後，復設置有在保持溫度T2之下保持 爐内溫度之保持處理（調節工序）。於本實施形態中，則實 施1小時的保持處理。 其次，於步驟S4中，則從保持溫度T2升溫至使處理 品W燒結之燒結溫度T1。 最後，於步驟S5中，在溫度感測器51、52的計測結 果均達到燒結溫度T1為止，使爐内溫度於燒結溫度T1之 下保持預定時間，以使處理品W燒結。藉由以上的處理’ 12 322646 201132427 可達成製品的均質化。在此，於本實施例中之總處理時間， 為9.5小時。 刖述第1實施形態，係將經配置於至少爐内互相不同 的位置之處理品W1及處理品W2(粉末成型品）中所含之 臘，進行加熱以脫脂之脫脂方法。如採用此種方法，則具 有將前述爐内溫度在較臘會蒸發之蒸發點Tv為高，且較 處理品W會滲碳之溫度為低的範_保持預定時間之步 驟S3(保持工序）。於此步驟S3 +，如將爐内溫度保持預 定時間，則能抑制處理品w之間或丨個處理品w的不同 部分的溫度差的擴大，並藉由於爐内之熱傳導而可緩和處 理品W之間或丨個處理品w的不同部分的溫度差。又， 於步驟S3的保持ji序中，藉由將爐内溫度作成較服的蒸 發點Tv(有機黏合劑的蒸發溫度)為高的溫度，則可使胤確 實從處理品W蒸發。再者，藉由將爐内溫度作成較因腺蒸 毛所產生之氣體所引起之渗碳之溫度為低的溫度，則可抑 制處理品w之產生滲碳。因此，本發明之第i實施形態中， 可降低完成後之製品的品質的落差。 又’於刖述第1實施形態中，藉由步驟S3M設置有調 節工序’可對應臘的固體差、或處理品W1及處理品W2的 升皿速度的差異’而可於此等處理品之間實現均等的脫脂。 又’於第1實施形態中，就複數個處理品W而言，在 至少互相不同的位置’配置有處理品W1(第i粉末成型品) 及處理品W2(第2粉末成型品），並具有計測處理品W1的 溫度之第1計測X序、及計測處理品W2的溫度之第2計S 322646 11 201132427 Therefore, if the temperature inside the furnace is at the evaporation point Tv, the part of the material that evaporates and the part that does not evaporate. Therefore, in the form of the Taiyuan in the present embodiment, in step S3, the temperature in the furnace is maintained at a temperature slightly higher than the evaporation point Tv, so that the wax does evaporate. Further, in step S3, the temperature in the furnace is maintained at a temperature T2 at which the temperature at which the carburized is lower than the treated product w, thereby suppressing carburization of the treated article. Here, the carburizing temperature of the treated product W is determined by the type of wax and the pressure in the furnace. The carburization temperature of the treatment of the present embodiment is, for example, a temperature higher than the evaporation point Tv by about 5 generations. Keep the temperature ^, (4) to a temperature higher than the evaporation point Tv, but if the temperature is too high, the treated product w will be carburized. If the scale temperature T2 is too close to the evaporation point Τν, then the wax cannot be completely The possibility of evaporation ^ Under this point of view, keep the temperature Τ2, and make Τν+ about 30 °C. Here, the strict evaporation is almost complete in the slow temperature rising treatment, but the evaporation characteristics of the wax are individually poor. Therefore, after the temperature rising treatment, the wax can be completely removed from the treated product W. On the other hand, after the completion of the step S3 in order to adjust the time of the step S3, the holding process of maintaining the temperature in the furnace below the holding temperature T2 is further provided (adjustment step). In the present embodiment, the holding process for one hour is carried out. Next, in step S4, the temperature is raised from the holding temperature T2 to the sintering temperature T1 at which the processed product W is sintered. Finally, in step S5, until the measurement results of the temperature sensors 51, 52 reach the sintering temperature T1, the furnace temperature is maintained for a predetermined time under the sintering temperature T1 to sinter the treated product W. Homogenization of the article can be achieved by the above process ' 12 322646 201132427 . Here, the total processing time in the present embodiment was 9.5 hours. The first embodiment is a degreasing method in which the wax contained in the treated product W1 and the treated product W2 (powder molded product) disposed at different positions in the furnace are heated to degrease. If such a method is employed, the step S3 (holding step) in which the temperature in the furnace is higher than the evaporation point Tv at which the wax is evaporated and the temperature at which the treated product W is carburized is lower is maintained for a predetermined time. . In this step S3+, if the temperature in the furnace is maintained for a predetermined period of time, the temperature difference between the treated articles w or the different portions of the treated product w can be suppressed, and the treated product can be alleviated by heat conduction in the furnace. The temperature difference between W or different parts of the treated product w. Further, in the holding step of the step S3, by setting the temperature in the furnace to a temperature at which the evaporating point Tv (the evaporation temperature of the organic binder) is higher, the crucible can be surely evaporated from the treated product W. Further, by setting the temperature in the furnace to a temperature lower than the temperature of carburization caused by the gas generated by glandular steaming, carburization of the treated product w can be suppressed. Therefore, in the i-th embodiment of the present invention, it is possible to reduce the difference in quality of the finished product. In the first embodiment, the step S3M is provided with the adjustment step 'corresponding to the difference in solidity of the wax or the difference in the speed of the processed product W1 and the processed product W2. Equal degreasing is achieved. In the first embodiment, the processed product W1 (the i-th powder molded article) and the treated product W2 (the second powder molded article) are disposed at at least mutually different positions from the plurality of processed articles W, and The second measurement of the temperature of the processed product W1 and the second measurement of the temperature of the processed product W2
S 322646 13 201132427 f則 丁 日 、且，具有在第1計測工序及第2計測工序中的 相、”。果均達到蒸發溫度之前，將爐内溫度保持預定時間 於該蒸發溫度下之第2保持工序。 因此，在處理品W1及處理品W2均成為臘的蒸發溫 度為止之間，藉由將爐内溫度保持在該蒸氣溫度，即能於 將處理品W1及處理品W2的溫度作成略均等之後，作成 能開始在㈣工序中將溫度升溫之狀[因此，即使在保 持工序中的溫度與處理品W1及處理品W2的臘蒸氣溫度 之間的恤度差較大的情形，仍然能於處理品臀丨及處理品 W2之間使_#職，絲抑侧賴發所發生之氣體 所引起之處理品W之產生渗碳。 又’於第1實施形態中，就1個處理品w而言，具琴 計測該處理品w的不同部分的第丨位置的溫度之第 工序、及計測與該處理品w的坌，〜, w的第1位置不相同的第2位3 之溫度的第2計測工序。並且且士够 且具有第1計測工序及第2言 測工序中的計測結果均達到蒗 “、、虱/皿度之則，將爐的溫度名S 322646 13 201132427 f has a phase in the first measurement step and the second measurement step, and the temperature in the furnace is maintained for a predetermined time at the evaporation temperature before the evaporation temperature is reached. Therefore, when the temperature of the furnace is maintained at the vapor temperature between the treated product W1 and the treated product W2, the temperature of the treated product W1 and the treated product W2 can be made slightly. After the equalization, the temperature can be raised in the step (4). Therefore, even if the temperature difference between the temperature in the holding step and the wax temperature of the treated product W1 and the treated product W2 is large, Between the treated product, the hip and the treated product W2, the treated product W caused by the gas generated by the _# job is caused to form carburization. In the first embodiment, one processed product is used. w is a step of measuring the temperature of the second position of the different portion of the processed product w, and measuring the temperature of the second position 3 which is different from the first position of 坌, 〜, w of the processed product w. The second measurement process. A measurement result of the measuring step and the second step is made by measuring Lang reached ",, lice / degree of the dish, the temperature of the reactor were
持預定時間於該蒸氣溫度下之第2保持工序 X 因而，於1個處理品 Α ^ 中第1位置的部分及第2位j 的部分均成為處理品W的臘的兔政、w + 的洛發溫度為止之間，將爐户 溫度以臘的蒸發溫度保持，笋以收* 膝 错从將1個處理品W的各部^ 之間的溫度作成略均等之後，作占 作成能開始在保持工序中并 溫度升溫之狀態。因此，即佶大扣』士 在保持工序中的溫度與臘白 蠢度之临度差較大的情形， W的各部分之間使臘均等脫脂， 徊绝理〇 貺知，並能抑制因臘蒸發所產4 322646 14 201132427 之氣體所引起之處理品w的產生滲碳。 (第2實施形態） 其次，就本發明第2實施形態加以說明。於下述說明 中，就與前述實施形態相同或相等的構成部分，附與同一 符號，並將該說明簡略或加以省略。 第3圖係為用以說明本發明第2實施形態中之脫脂方 法之圖表。與前述實施形態同樣，於第3圖的圖表中，縱 軸表示溫度、橫軸表示時間。又，於第3圖中，實線表示 爐内（加熱器5)的溫度變化、虛線表示處理品W1的溫度變 化、一點鏈線表示處理品W2的溫度變化。 於第2實施形態中，為較前述實施形態為能更縮短處 理時間，調節爐内的氛圍壓力，以提高臘的蒸氣點Tv(壓 力調節工序）。當提高爐内的氛圍壓力時，由於對處理品W 的傳熱性會增高，故可達成處理時間的縮短。 爐内的氛圍壓力之調節，係以控制主排氣系8的驅動 與載體氣體供給系7的驅動來實施。於第1實施形態中， 係在真空氛圍之下進行脫脂者，惟於第2實施形態中，則 使主排氣系8進行暖機運轉(warming-up operation)，並從 載體氣體供給系7供給預定量的惰性氣體，並於較真空氛 圍為高的壓力的減壓氛圍之下實施脫脂。如第3圖所示， 第2實施形態的臘的蒸發點Tv，為約350°C。當提高臘的 蒸發點Tv時，則於步驟S1及步驟S2中，可提高對處理 品W之熱量輸入量（heat input amount)。又，當提高臘的蒸 發點Tv時，則由於蒸發點Tv與燒結溫度T1之差值會減 15 322646 201132427 少，故可縮短使處理品W升溫至步驟S4及步驟S5中之燒 結溫度T1止之時間。在此，於本實施例中之總處理時間， 為8.5小時。於本發明之第2實施形態中，由於除第1實 施形態中所述之工序之外尚具備壓力調節工序，故爐内的 氛圍壓力增高、並對處理品W的傳熱性增大，故可實現處 理時間的縮短。 (第3實施形態） 其次，就本發明第3實施形態加以說明。於下述說明 中，就與前述實施形態相同或相等的構成部分，附與同一 符號，並將其說明簡略或加以省略。 第4圖係為用以說明本發明第3實施形態中之脫脂方 法之圖表。與前述實施形態同樣，於第4圖的圖表中，縱 軸表示溫度、橫軸表示時間。又，於第4圖中，實線表示 爐内（加熱器5)的溫度變化、虛線表示處理品W1的溫度變 化、一點鏈線表示處理品W2的溫度變化。 於第3實施形態中，為較前述第1及第2實施形態更 縮短處理時間，除第2實施形態的手法之外，尚在轉進至 步驟S2之前，設置使爐内的溫度升溫為蒸發點Tv以上之 步驟(升溫工序）S1’。 於步驟S1’中，於初始之升溫中，在使爐内的溫度升 溫為較蒸發點Tv為高的溫度T4之後，降溫至蒸發點Tv。 於步驟S1’中之至蒸發點Tv之降溫，係在停止加熱器5的 加熱後，藉由利用爐内氛圍或水冷管套（Water cooling j acket)之吸熱而實施。藉由實施該步驟S Γ而增高對處理品 16 322646 201132427 w之熱量輸人量以提高升溫速度’故能實現處理時間的縮 短。在此，由於步驟S1，係在步驟S2之前實施，故處理品 W不致升溫至高於滲碳溫度。再者，於步驟S2中，可防 患處理品W的溫度之上升於未然。在此，於本實施例中之 總處理時間，為7.9小時。 、本發明之第3實施形態中’由於除在第1實施形態中 =述之工序之外，尚具備有升溫工序之結果，爐内的溫度升 高並增快處理品W的升溫速度，故能實現處理時間的縮短。 以上，在參照圖式之下就本發明之較佳的實施形態加 以說明，惟本發明並不因前述實施形態而有所限定。於前 述之實施形態中所示之各構成構件的各形狀或組合等僅為 二例’只要是在不逸脫本發明之纟旨之範_，能根據設 計要求而作各種改變。 例如，於前述實施形態中，係按從步驟S1經過步驟 S2而轉進至步驟S3之方式做說明者，惟本發明中並不特 別限定於此，而可作成，例如，不經過步驟S2之下直接 從步驟S1轉進至步驟S3。 又，於前述實施形態中，係以粉末成型中所含之有機 黏合劑為臘作為例示而說明者，惟本發明中並不特別限定 於此，而可為膠黏劑等其他種類的有機黏合劑。 或者，不僅在處理複數個處理品w之情形，尚可在處 理1個處理品W之情形適用本發明。在此情形，於前述實 施形態中，係將$丨粉末成型品W1及冑2粉末成型品 W2的溫度分別使用溫度感測器51、52計測後加以處理In the second holding step X at the vapor temperature for a predetermined period of time, the portion of the first position and the portion of the second position j of the one processed product Α ^ are the rabbits of the treated product W, and w + Between the temperature of the Luofa, the temperature of the furnace is maintained at the evaporation temperature of the wax, and the temperature of the bamboo is used to make the temperature of each part of the treated product W slightly equal. The state in which the temperature rises during the process. Therefore, even if the difference between the temperature in the holding process and the whiteness of the waxy whiteness is large, the waxes are degreased between the various parts of the W, and the sputum is ignorant and can suppress the cause. Carburization of the treated product w caused by the gas produced by the evaporation of 4 322646 14 201132427. (Second embodiment) Next, a second embodiment of the present invention will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description will be simplified or omitted. Fig. 3 is a chart for explaining the degreasing method in the second embodiment of the present invention. Similarly to the above-described embodiment, in the graph of Fig. 3, the vertical axis represents temperature and the horizontal axis represents time. Further, in Fig. 3, the solid line indicates the temperature change in the furnace (heater 5), the broken line indicates the temperature change of the treated product W1, and the dotted line indicates the temperature change of the treated product W2. In the second embodiment, in comparison with the above-described embodiment, the treatment time can be shortened, and the atmospheric pressure in the furnace can be adjusted to increase the vapor point Tv of the wax (pressure adjustment step). When the atmospheric pressure in the furnace is increased, the heat transfer property to the treated product W is increased, so that the processing time can be shortened. The adjustment of the atmospheric pressure in the furnace is carried out by controlling the driving of the main exhaust system 8 and the driving of the carrier gas supply system 7. In the first embodiment, the degreaser is performed under a vacuum atmosphere. However, in the second embodiment, the main exhaust system 8 is subjected to a warming-up operation from the carrier gas supply system 7 A predetermined amount of inert gas is supplied, and degreasing is carried out under a reduced pressure atmosphere having a high pressure under a vacuum atmosphere. As shown in Fig. 3, the evaporation point Tv of the wax of the second embodiment is about 350 °C. When the evaporation point Tv of the wax is increased, the heat input amount to the treatment product W can be increased in steps S1 and S2. Further, when the evaporation point Tv of the wax is increased, since the difference between the evaporation point Tv and the sintering temperature T1 is reduced by 15 322646 201132427, the temperature of the processed product W can be shortened to the sintering temperature T1 in the step S4 and the step S5. Time. Here, the total processing time in this embodiment was 8.5 hours. In the second embodiment of the present invention, since the pressure adjustment step is provided in addition to the steps described in the first embodiment, the atmospheric pressure in the furnace is increased and the heat transfer property of the treated product W is increased. The processing time can be shortened. (Third embodiment) Next, a third embodiment of the present invention will be described. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and their description will be simplified or omitted. Fig. 4 is a view for explaining the degreasing method in the third embodiment of the present invention. Similarly to the above-described embodiment, in the graph of Fig. 4, the vertical axis represents temperature and the horizontal axis represents time. Further, in Fig. 4, the solid line indicates the temperature change in the furnace (heater 5), the broken line indicates the temperature change of the treated product W1, and the dotted line indicates the temperature change of the treated product W2. In the third embodiment, the processing time is shortened in comparison with the first and second embodiments. In addition to the method of the second embodiment, before the step S2 is performed, the temperature in the furnace is increased to evaporate. The step of Tv or more (heating process) S1'. In the step S1', in the initial temperature rise, after the temperature in the furnace is raised to a temperature T4 higher than the evaporation point Tv, the temperature is lowered to the evaporation point Tv. The temperature drop in the step S1' to the evaporation point Tv is carried out by stopping the heating of the heater 5 by utilizing the heat of the furnace or the heat absorption of the water-cooled jacket. By performing this step S Γ, the amount of heat input to the treated product 16 322646 201132427 w is increased to increase the heating rate □ so that the processing time can be shortened. Here, since step S1 is carried out before step S2, the treated product W does not rise above the carburizing temperature. Further, in step S2, it is possible to prevent the temperature of the treated product W from rising. Here, the total processing time in this embodiment was 7.9 hours. In the third embodiment of the present invention, in addition to the steps described in the first embodiment, the temperature rise step is increased, and the temperature in the furnace is increased to increase the temperature rise rate of the processed product W. Can achieve a reduction in processing time. The preferred embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited by the foregoing embodiments. The respective shapes, combinations, and the like of the respective constituent members shown in the above-described embodiments are merely two examples. As long as they do not deviate from the scope of the present invention, various changes can be made according to design requirements. For example, in the above-described embodiment, the description proceeds from step S1 to step S3 through step S2. However, the present invention is not limited thereto, and may be formed, for example, without going through step S2. The process proceeds directly from step S1 to step S3. Further, in the above-described embodiment, the organic binder contained in the powder molding is exemplified as the wax. However, the present invention is not particularly limited thereto, and may be another type of organic bonding such as an adhesive. Agent. Alternatively, the present invention can be applied not only in the case of processing a plurality of processed articles w but also in the case of processing one processed article W. In this case, in the above embodiment, the temperatures of the $丨 powder molded product W1 and the 胄2 powder molded product W2 are measured by the temperature sensors 51 and 52, respectively.
S 322646 17 201132427 者。惟亦可將此處理作成於i個處理品w之第i位置的部 分(例如，處理品W的内侧）及於與此不同的第2位置的部. 分(例如，處理品w的外侧），分別設置溫度感測器51、52 來計測溫度，以實施本發明之脫脂方法。由此，即能降低 於1個處理品W之各部分之品質的落差。 [產業上之利用可能性] 依據本發明之脫脂方法，可降低粉末成型品的各製品 之間的品質的落差以及一製品的各部分之間的品質的落 差，並可縮短粉末成型品的處理時間。 【圖式簡單說明】 ^1圖係表不本發明實施形態中之脫脂爐之構成圖。 第2圖係為用以說明本發明第丨實施形態中之脫脂方 法之圖表。 第3圖係為用以說明本發明第2實施形態中之脫脂方 法之圖表。 第4圖係為用以說明本發明第3實施形態中之脫脂方 法之圖表。 【主要元件符號說明】 51 步驟(通電升溫工序） S1’ 步驟(升溫工序） 52 步驟(第2保持工序） S3 步驟(保持工序） T2 保持溫度 T3 溫度(Tv-20°C) Τ' ν 蒸發點(有機黏合劑之蒸發溫度）S 322646 17 201132427. However, this processing may be performed as a portion of the i-th position of the i-processed product w (for example, the inside of the processed article W) and a portion of the second position different from the above (for example, the outer side of the processed article w). Temperature sensors 51, 52 are separately provided to measure the temperature to carry out the degreasing method of the present invention. Thereby, it is possible to reduce the difference in quality of each part of one processed product W. [Industrial Applicability] According to the degreasing method of the present invention, it is possible to reduce the drop in quality between the products of the powder molded article and the difference in quality between the respective portions of a product, and to shorten the treatment of the powder molded article. time. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a configuration of a degreasing furnace in an embodiment of the present invention. Fig. 2 is a chart for explaining the degreasing method in the third embodiment of the present invention. Fig. 3 is a chart for explaining the degreasing method in the second embodiment of the present invention. Fig. 4 is a view for explaining the degreasing method in the third embodiment of the present invention. [Description of main component symbols] 51 Step (Energy-heating process) S1' Step (heating process) 52 Step (2nd holding process) S3 Step (holding process) T2 Maintaining temperature T3 Temperature (Tv-20°C) Τ' ν Evaporation Point (evaporation temperature of organic binder)
Wl 處理品(第1粉末成型品）W2 處理品(第2粉末成型品） 18 322646Wl treated product (first powder molded product) W2 treated product (second powder molded product) 18 322646