TWI756955B - Method and device for manufacturing a foamed metal and intermediate foaming process - Google Patents
Method and device for manufacturing a foamed metal and intermediate foaming process Download PDFInfo
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本發明是有關於一種發泡金屬的製造方法及設備，且特別是有關於一種具有中間發泡製程之發泡金屬的製造方法及設備。 The present invention relates to a manufacturing method and equipment of a foamed metal, and in particular, to a manufacturing method and equipment of a foamed metal with an intermediate foaming process.
發泡金屬具有別於傳統金屬的優異特性，以發泡鋁金屬為例，發泡鋁具有質輕，絕熱，電磁遮罩高等優良特性，在建築，航空航太等行業都有廣泛的應用；為了滿足各行業的應用需求，發泡鋁的高效製備成為冶金領域研究重點。 Foamed metal has excellent characteristics that are different from traditional metals. Taking foamed aluminum metal as an example, foamed aluminum has excellent characteristics such as light weight, heat insulation, and electromagnetic shielding, and is widely used in construction, aerospace and other industries; In order to meet the application needs of various industries, the efficient preparation of foamed aluminum has become the focus of research in the field of metallurgy.
目前在發泡鋁製備方法中，直接吹氣法是指在金屬熔湯內通入氣體從而生產氣泡材料的製程，其優點是成本低，可實現大批量連續生產。然而，在注氣發泡的過程中，因氣泡本身的表面張力有限，以致當氣泡進入金屬熔湯內時，其無法承受金屬熔湯因其重力給予的作用，造成氣泡自其表面產生向內坍塌的情形。 At present, in the preparation method of foamed aluminum, the direct air blowing method refers to the process of introducing gas into the molten metal to produce the bubble material, which has the advantages of low cost and can realize large-scale continuous production. However, in the process of gas injection and foaming, due to the limited surface tension of the bubbles themselves, when the bubbles enter the molten metal, they cannot withstand the effect of the gravity of the molten metal, resulting in the generation of bubbles from its surface inward. collapse situation.
是以，現有金屬發泡成形製程中仍存在著氣泡無法與金屬熔湯有效充分的接觸，進而具有氣泡分佈不均勻、發泡率低等諸多問題，嚴重影響金屬發泡成形後之發泡金屬的機械性質及其製備良率。 Therefore, in the existing metal foam forming process, there are still many problems such as the inability of the bubbles to contact the metal molten soup effectively and fully, and further problems such as uneven distribution of the bubbles, low foaming rate, etc., which seriously affect the foam metal after the metal foam forming. mechanical properties and their fabrication yields.
大陸專利申請案(公告號CN100422363C)揭示如下：一種熔體發泡法製備泡沫鋁或泡沫鋁合金的發泡裝置，上述發泡裝置由隔板隔成增黏室與發泡室，隔板的下部留有增黏室中熔體可流向發泡室的導流孔；增黏室裝配有監控熔體黏度的黏度感測器及可負壓吸入增黏劑的混合攪拌器；所述發泡室裝配有可負壓吸入發泡劑或發泡 氣體的混合攪拌器；增黏室中所安裝混合攪拌器的吸入增黏劑通道上設有調整供給閥；發泡室中所安裝混合攪拌器的吸入發泡劑或發泡氣體通道上設有調整供給閥。本專利文獻可方便地對熔體的黏度進行連續調整、並可維持熔體內黏度的均一性，還可通過控制發泡劑或發泡氣體的吸入量、來連續製備出泡體分佈且具有不同密度的泡沫鋁或泡沫鋁合金產品。 The mainland patent application (public notice number CN100422363C) discloses the following: a foaming device for preparing foamed aluminum or foamed aluminum alloy by a melt foaming method. The lower part has a guide hole for the melt in the thickening chamber to flow to the foaming chamber; the thickening chamber is equipped with a viscosity sensor for monitoring the viscosity of the melt and a mixing agitator that can inhale the thickening agent under negative pressure; the foaming Chamber is equipped with negative pressure inhalable foaming agent or foam Gas mixing agitator; an adjustment and supply valve is provided on the inhalation thickener channel of the mixing agitator installed in the viscosity increasing chamber; the inhalation foaming agent or foaming gas channel of the mixing agitator installed in the foaming chamber is provided with Adjust the supply valve. This patent document can conveniently adjust the viscosity of the melt continuously, and maintain the uniformity of the viscosity in the melt. It can also control the intake of the foaming agent or the foaming gas to continuously prepare the foam with different distributions. Density foam aluminum or foam aluminum alloy products.
美國專利(證書號US6984356B2)揭示如下：一種連續生產泡沫金屬的方法，包括以下步驟：(i)將預先溶解的熔融金屬加入到增黏爐中並攪拌熔融金屬以均勻地保持熔融金屬的黏度；(ii)將熔融金屬輸送至電子攪拌式發泡爐；(iii)在攪拌的同時將氣體注入輸送的熔融金屬中以獲得泡沫狀的熔融金屬；(iv)使用輥拉伸獲得的泡沫熔融金屬並冷卻拉伸的泡沫金屬。本發明的有益效果在於：將增黏劑添加到增強熔爐中並熔化金屬，並通過電子攪拌系統代替機械葉輪攪拌熔融金屬，泡沫可以均勻地分散在熔融金屬中。 U.S. Patent (Certificate No. US6984356B2) discloses the following: a method for continuous production of metal foam, comprising the steps of: (i) adding pre-dissolved molten metal into a viscosifying furnace and stirring the molten metal to uniformly maintain the viscosity of the molten metal; (ii) conveying the molten metal to an electronically stirred foaming furnace; (iii) injecting gas into the conveyed molten metal while stirring to obtain a foamed molten metal; (iv) using roll stretching to obtain a foamed molten metal And cool the stretched metal foam. The beneficial effect of the present invention is that: adding a tackifier into a reinforced melting furnace and melting the metal, and stirring the molten metal by an electronic stirring system instead of a mechanical impeller, the foam can be uniformly dispersed in the molten metal.
大陸專利申請案(公布號CN102962413A)揭示如下：一種可獲均一泡體閉孔泡沫鋁的連續鑄造系統，由熔煉爐(100)、中間包、連續發泡爐、連鑄模具與連續牽引裝置構成，其特徵在於：所述的中間包裝配有防止熔體增黏顆粒沉降的攪拌器，所述的中間包上還有供熔煉爐熔體轉入的熔體入口、熔體增黏顆粒加入的顆粒入口以及增黏熔體的放料口；所述的連續發泡爐由隔板)隔成有儲液室與發泡室，所述的隔板的下部留有所述的儲液室中的熔體可流向所述的發泡室的導流孔，所述的儲液室裝配有維持增黏顆粒均勻分散於熔體中的攪拌器，所述的發泡室裝配有通氣管以及可保證熔體與氣泡從下部進入並充分混合的氣液混合攪拌器，所述的連續發泡爐上設有連接所述的放料口與所述的儲液室的溜槽，所述的連鑄模具與所述的發泡室連接，所述的連鑄模具由石墨內模與包覆所述的石墨內模的水冷套組成。 The Mainland Patent Application (Publication No. CN102962413A) discloses the following: a continuous casting system capable of obtaining closed-cell aluminum foam with a uniform foam body, consisting of a melting furnace (100), a tundish, a continuous foaming furnace, a continuous casting mold and a continuous pulling device It is characterized in that: the intermediate package is equipped with a stirrer to prevent the settling of the melt tackifying particles, and the tundish also has a melt inlet for the melting furnace melt to be transferred into, and a melt tackifying particle is added to the tundish. The particle inlet and the discharge port of the viscosified melt; the continuous foaming furnace is divided into a liquid storage chamber and a foaming chamber by a partition), and the lower part of the partition is left in the liquid storage chamber. The melt can flow to the guide hole of the foaming chamber, the liquid storage chamber is equipped with a stirrer to keep the viscosity-increasing particles uniformly dispersed in the melt, and the foaming chamber is equipped with a vent pipe and a A gas-liquid mixing agitator that ensures that the melt and bubbles enter from the bottom and are fully mixed, the continuous foaming furnace is provided with a chute connecting the discharge port and the liquid storage chamber, and the continuous casting The mold is connected with the foaming chamber, and the continuous casting mold is composed of a graphite inner mold and a water cooling jacket covering the graphite inner mold.
然而，上述專利文獻皆未揭示將含氣泡的該半固態金屬熔湯進行溫度控制、壓力保持及輔助注氣，因此氣泡仍無法與 金屬熔湯有效充分的接觸，進而仍具有氣泡分佈不均勻、發泡率低等諸多問題。 However, none of the above-mentioned patent documents discloses temperature control, pressure maintenance and auxiliary gas injection for the semi-solid metal molten soup containing bubbles, so the bubbles still cannot be combined with the gas. The molten metal is effectively and fully contacted, and there are still many problems such as uneven distribution of bubbles and low foaming rate.
因此，便有需要提供一種發泡金屬的製造方法及設備，以解決前述的問題。 Therefore, there is a need to provide a method and equipment for manufacturing foamed metal to solve the aforementioned problems.
本發明之一目的是提供一種發泡金屬的製造方法及設備，其具有中間發泡製程可將發泡金屬熔湯進行溫度控制、壓力保持及輔助注氣。 An object of the present invention is to provide a method and equipment for manufacturing foamed metal, which has an intermediate foaming process and can perform temperature control, pressure maintenance and auxiliary gas injection on the foamed metal molten soup.
依據上述之目的，本發明提供一種發泡金屬的製造方法，包括：一熔煉步驟，將金屬材料熔融形成一金屬熔湯；一注氣發泡步驟，注入氣體於該金屬熔湯，使該金屬熔湯內充滿該氣體產生之氣泡，形成一發泡金屬熔湯；一中間發泡步驟，控制該發泡金屬熔湯的工作溫度於其半固態溫度區間，使該發泡金屬熔湯維持在半固態，直至其內部氣泡形態漸趨於一致，形成一目標熔湯；以及一澆鑄步驟，將該目標熔湯固化成一發泡金屬，該發泡金屬內部充滿複數個未完全連通的孔洞。 In accordance with the above purpose, the present invention provides a method for manufacturing foamed metal, comprising: a smelting step of melting a metal material to form a molten metal; a gas injection foaming step of injecting gas into the molten metal to make the metal molten The molten soup is filled with air bubbles generated by the gas to form a foamed metal molten soup; an intermediate foaming step controls the working temperature of the foamed metal molten soup in its semi-solid temperature range, so that the foamed metal molten soup is maintained at semi-solid until the shape of the internal bubbles tends to be uniform, forming a target molten soup; and a casting step, solidifying the target molten soup into a foamed metal, and the foam metal is filled with a plurality of incompletely connected holes.
本發明更提供一種發泡金屬的製造設備，其包括：將一注氣發泡爐，連通於該熔煉爐，並用以注入氣體於一金屬熔湯，使該金屬熔湯內充滿該氣體產生之氣泡，形成一發泡金屬熔湯；一中間發泡室，連通於該注氣發泡爐，用以控制該發泡金屬熔湯的工作溫度於其半固態溫度區間，使該發泡金屬熔湯維持在半固態，直至其內部氣泡形態漸趨於一致，形成一目標熔湯；以及一鑄造裝置，連通於該中間發泡室，用以將該目標熔湯固化成一發泡金屬，該發泡金屬內部充滿複數未完全連通的孔洞。 The present invention further provides a manufacturing equipment for foamed metal, which comprises: connecting a gas injection foaming furnace to the smelting furnace, and injecting gas into a molten metal, so that the molten metal is filled with the gas generated by the gas. The air bubbles form a foamed metal molten soup; a middle foaming chamber is connected to the gas injection foaming furnace to control the working temperature of the foamed metal molten soup in its semi-solid temperature range, so that the foamed metal molten The soup is maintained in a semi-solid state until the shape of its internal bubbles tends to be uniform, forming a target molten soup; and a casting device, connected to the intermediate foaming chamber, is used to solidify the target molten soup into a foamed metal, and the molten metal is formed. The inside of the bubble metal is filled with a plurality of incompletely connected holes.
由於本發明之發泡金屬的製造方法的中間發泡製程可將該發泡金屬熔湯進行溫度控制及壓力保持，且可輔助注入氣體，因此可使氣泡與該發泡金屬熔湯有效充分的接觸，氣泡比較均勻地分布在該發泡金屬熔湯中，進而改善多孔性發泡金屬孔隙 的均匀性。據此，本發明之發泡金屬的製造方法及設備可得到機械性能更好、密度更均勻的多孔性發泡金屬，是對目前的發泡金屬的製造方法及設備之有效的改進。 Since the intermediate foaming process of the manufacturing method of foamed metal of the present invention can control the temperature and maintain the pressure of the molten metal, and can assist in the injection of gas, the bubbles and the molten metal can be effectively and fully formed. Contact, the bubbles are more evenly distributed in the foamed metal molten soup, thereby improving the porous foamed metal pores uniformity. Accordingly, the metal foam manufacturing method and equipment of the present invention can obtain porous metal foam with better mechanical properties and more uniform density, which is an effective improvement over the current metal foam manufacturing method and equipment.
10:金屬熔湯 10: Metal Molten Soup
11:氣泡 11: Bubbles
12:流量控制閥 12: Flow control valve
2:注氣發泡爐 2: Gas injection foaming furnace
21:主要注氣口 21: Main air injection port
22:內部 22: Inside
23:氣體供應器 23: Gas supply
3:中間發泡室 3: Intermediate foaming chamber
30:發泡控制組件 30: Foaming control components
311:外部 311: External
312:內部 312: Internal
32:計時器 32: Timer
321:熔湯入口 321: molten soup entrance
322:熔湯出口 322: molten soup outlet
33:鎖扣件 33: Locks
34:可轉動栓 34: Turnable bolt
35:輔助注氣口 35: Auxiliary gas injection port
36:壓力感測器 36: Pressure sensor
37:處理器 37: Processor
38:溫度感測器 38: Temperature sensor
39:加熱器 39: Heater
4:鑄造裝置 4: Casting device
S10:步驟 S10: Steps
S20:步驟 S20: Steps
S30:步驟 S30: Step
S31:步驟 S31: Step
S32:步驟 S32: Step
S33:步驟 S33: Step
S34:步驟 S34: Step
S40:步驟 S40: Steps
圖1為本發明之一實施例之發泡金屬的製造方法之流程圖。 FIG. 1 is a flow chart of a manufacturing method of foamed metal according to an embodiment of the present invention.
圖2為本發明之一實施例之發泡金屬的製造方法之中間發泡製程之流程圖。 FIG. 2 is a flow chart of an intermediate foaming process of a manufacturing method of foamed metal according to an embodiment of the present invention.
圖3為本發明之一實施例之中間發泡室之平面示意圖。 3 is a schematic plan view of an intermediate foaming chamber according to an embodiment of the present invention.
圖4為本發明之一實施例之發泡金屬的製造設備之注氣發泡爐、中間發泡室及鑄造裝置之剖面示意圖。 4 is a schematic cross-sectional view of the gas injection foaming furnace, the intermediate foaming chamber and the casting device of the foam metal manufacturing equipment according to an embodiment of the present invention.
圖5a為為先前技術之比較例之發泡金屬的金相圖及孔洞直徑/數目之關係圖。 FIG. 5 a is a metallographic diagram and a relationship diagram of the diameter/number of pores of a foamed metal of a comparative example of the prior art.
圖5b~圖5e為為本發明之實施例1~4之發泡金屬的金相圖及孔洞直徑/數目之關係圖。
5b to 5e are the metallographic diagrams and the relationship diagrams of the diameter/number of holes of the foamed metal according to the
為讓本發明之上述目的、特徵和特點能更明顯易懂，茲配合圖式將本發明相關實施例詳細說明如下。 In order to make the above objects, features and characteristics of the present invention more obvious and easy to understand, the relevant embodiments of the present invention are described in detail as follows in conjunction with the drawings.
圖1為本發明之一實施例之發泡金屬的製造方法之流程圖。該發泡金屬的製造方法主要包括：在熔煉步驟：進行一熔煉製程S10、在注氣發泡步驟：進行一注氣發泡製程S20、在中間發泡步驟：進行一中間發泡製程S30、及在澆鑄步驟：進行一澆鑄製程S40。 FIG. 1 is a flow chart of a manufacturing method of foamed metal according to an embodiment of the present invention. The manufacturing method of the foamed metal mainly includes: in the smelting step: performing a smelting process S10, in the gas injection foaming step: performing a gas injection foaming process S20, in the intermediate foaming step: performing an intermediate foaming process S30, And in the casting step: a casting process S40 is performed.
該熔煉製程S10利用該熔煉爐，將金屬材料熔融形成一金屬熔湯。舉例，該熔煉爐可為感應熔煉爐，其包括感應線圈可將金屬材料熔融形成金屬熔湯。該注氣發泡製程S20利用該注氣發泡爐，該注氣發泡爐連通於該熔煉爐，注入氣體於該金屬熔湯，使該金屬熔湯內充滿該氣體產生之氣泡，形成一發泡金 屬熔湯。舉例，該注氣發泡爐可包括一轉動軸(例如500rpm以上)轉動葉片，以攪拌該半固態金屬熔湯；以及，一注氣口，用以將氣體注入該半固態金屬熔湯中，以形成該發泡金屬熔湯。該中間發泡製程S30利用該中間發泡室，該中間發泡室連通於該注氣發泡爐，控制該發泡金屬熔湯的工作溫度於其半固態溫度區間，使該發泡金屬熔湯維持在半固態，直至其內部氣泡形態漸趨於一致，形成一目標熔湯。該澆鑄製程S40利用該鑄造裝置，該鑄造裝置連通於該中間發泡室，將該目標熔湯固化成一發泡金屬，該發泡金屬內部充滿複數個未完全連通的孔洞。舉例，該鑄造裝置可為水冷式模具。 The smelting process S10 utilizes the smelting furnace to smelt the metal material to form a molten metal soup. For example, the smelting furnace can be an induction smelting furnace, which includes an induction coil to melt the metal material to form a molten metal soup. The gas injection foaming process S20 utilizes the gas injection foaming furnace, the gas injection foaming furnace is connected to the smelting furnace, and gas is injected into the molten metal, so that the molten metal is filled with air bubbles generated by the gas to form a foam gold Is a molten soup. For example, the gas injection foaming furnace may include a rotating shaft (eg, above 500 rpm) rotating blades to stir the semi-solid metal molten soup; and a gas injection port for injecting gas into the semi-solid metal molten soup, so as to This foamed metal molten soup is formed. The intermediate foaming process S30 utilizes the intermediate foaming chamber, the intermediate foaming chamber is connected to the gas injection foaming furnace, and controls the working temperature of the foamed metal molten soup to be in the semi-solid temperature range, so that the foamed metal melts The soup is maintained in a semi-solid state until the shape of its internal bubbles gradually converges, forming a target molten soup. The casting process S40 utilizes the casting device. The casting device is connected to the intermediate foaming chamber to solidify the target molten metal into a foamed metal, and the foamed metal is filled with a plurality of incompletely connected holes. For example, the casting device may be a water-cooled mold.
圖2為本發明之一實施例之發泡金屬的製造方法之中間發泡製程之流程圖。該中間發泡製程包括：在步驟S31，提供一中間發泡室，其容置有該發泡金屬熔湯；在步驟S32(溫度控制步驟)：控制該發泡金屬熔湯的工作溫度於其半固態溫度區間；在步驟S33(壓力保持步驟)：於維持該工作溫度的同時，另控制該發泡金屬熔湯的承受壓力為常壓~500m bar之間的範圍，當該承受壓力不足一目標壓力值時，進行該發泡金屬熔湯補償，使該發泡金屬熔湯的承受壓力恢復至該目標壓力值，如此可將該發泡金屬熔湯進行壓力保持；以及在步驟S34(輔助注氣步驟)：當該發泡金屬熔湯中所含的氣泡量不足一預設值時，輔助注入氣體於該發泡金屬熔湯且使其氣泡量恢復至該預設值，而形成該目標熔湯。 FIG. 2 is a flow chart of an intermediate foaming process of a manufacturing method of foamed metal according to an embodiment of the present invention. The intermediate foaming process includes: in step S31, providing an intermediate foaming chamber, which accommodates the molten metal foam; in step S32 (temperature control step): controlling the working temperature of the molten metal foam to be Semi-solid temperature range; in step S33 (pressure maintaining step): while maintaining the working temperature, the pressure of the foamed metal molten soup is controlled to be a range between normal pressure and 500m bar, when the pressure is less than one When the target pressure value is reached, compensation for the molten metal foam is performed, so that the bearing pressure of the molten metal foam is restored to the target pressure value, so that the molten metal foam can be maintained under pressure; and in step S34 (auxiliary) Gas injection step): when the amount of air bubbles contained in the molten metal foam is less than a preset value, auxiliary gas is injected into the molten metal foam to restore the amount of air bubbles to the preset value to form the Target molten soup.
圖3為本發明之中間發泡室之平面示意圖。該中間發泡室3包括：外部311為合金鋼材，以及內部312為耐火磚。該內部312具有熔湯入口321及熔湯出口322。該中間發泡室3更包括：鎖扣件33及可轉動栓(pin)34作為開啟或閉合該中間發泡室3之用。圖4為本發明之一種發泡金屬的製造設備之發泡金屬的製造設備之注氣發泡爐、中間發泡室及鑄造裝置之剖面示意圖。請參考圖4，該發泡金屬的製造設備包括相互連通的該注氣
發泡爐2及該鑄造裝置4。該中間發泡室3設置連接於該注氣發泡爐2與該鑄造裝置4之間。該注氣發泡爐2連接有一氣體供應器23，該注氣發泡爐2包括一主要注氣口21，其設置於該注氣發泡爐2之內部22，用以注入該氣體供應器23之氣體於該熔煉爐之金屬熔湯並使該金屬熔湯內充滿該氣體產生之氣泡11。該中間發泡室3之熔湯入口321連通於該注氣發泡爐2，用以接收該注氣發泡爐之發泡金屬熔湯(亦即含氣泡11的該半固態金屬熔湯10)。該中間發泡室3包括輔助注氣口35，其設置於該中間發泡室3之內部312，用以輔助注入該氣體供應器23之氣體至該中間發泡室3內之含氣泡11的半固態金屬熔湯10，並產生更多接近該熔湯出口322(更靠近該鑄造裝置4)的氣泡11。例如：注入氣體可為氮氣(N2)、空氣(Air)、氬氣(Ar)…等，注氣流量可為10sccm以上，其中sccm是ml/min，也是流量單位。
3 is a schematic plan view of the intermediate foaming chamber of the present invention. The
該中間發泡室3電性耦接(electrically coupled)有一發泡控制組件30，用以完成該發泡金屬的製造方法的中間發泡步驟。該中間發泡室3之發泡控制組件30包括訊號連接的一溫度感測器38及一加熱器39(例如電阻式的鎳鉻絲)，該溫度感測器38連接於該中間發泡室3之內部312用以量測該中間發泡室3內之熔湯溫度，該加熱器39用以控制熔湯的受熱溫度。該加熱器39設置於該中間發泡室3之外部311，可由處理器37利用實際溫度與預設溫度之溫度差控制該加熱器39將含氣泡11的半固態金屬熔湯10的溫度控制在半固態溫度區間700~900℃之間的範圍(此溫度範圍為根據半固態鋁合金熔湯之溫度控制)。該發泡控制組件30更包括訊號連接的一流量控制閥及一壓力感測器36，該壓力感測器36設置於該中間發泡室3之內部312，用以量測該中間發泡室3內之熔湯壓力，當該中間發泡室3之內部312的壓力不足時，可由處理器37利用實際的承受壓力與目標壓力值之壓力差控制該流量控制閥12進行該半固態金屬熔湯10之流量補償，如此可將該發泡金屬熔湯(含氣泡11的半固態金屬熔湯10)進行壓力
保持(常壓~500mbar之間的範圍)(此壓力範圍為根據半固態鋁金屬熔湯之壓力保持)。該中間發泡室3之熔湯出口322連通於該鑄造裝置4，用以將該半固態金屬熔湯10(此時為目標熔湯)送至該鑄造裝置4。該發泡控制組件30更包括計時器30，可將該目標熔湯進行計時，用以決定凝固發泡金屬於該鑄造裝置4中的時間。
The
在本實施例中，該半固態金屬熔湯可為半固態鋁合金熔湯。最後藉由鑄造裝置，將經過該中間發泡室之目標熔湯固化成鋁發泡金屬，該鋁發泡金屬內部充滿複數個未完全連通的孔洞。該鑄造裝置可配合例如：低壓鑄造機、連續鑄造機、真空鑄造機、重力鑄造機…等。圖5a~圖5e為為先前技術之比較例與本發明之實施例1~4之發泡金屬的金相圖及孔洞直徑/數目之關係圖。表一為先前技術之比較例與本發明之實施例1~4之發泡金屬製造方法的實驗結果差異表，如下：
In this embodiment, the semi-solid metal molten soup may be a semi-solid aluminum alloy molten soup. Finally, by means of a casting device, the target molten liquid passing through the intermediate foaming chamber is solidified into an aluminum foamed metal, and the interior of the aluminum foamed metal is filled with a plurality of incompletely connected holes. The casting device can be matched with, for example, a low pressure casting machine, a continuous casting machine, a vacuum casting machine, a gravity casting machine, etc. FIGS. 5 a to 5 e are metallographic diagrams and relationship diagrams of the diameter/number of holes of the foamed metal of the comparative example of the prior art and the examples 1 to 4 of the present invention. Table 1 is the difference table of the experimental results of the comparative example of the prior art and the foam metal manufacturing method of the
由上述圖5a~圖5e及表一可知，相較於先前技術，在溫度及壓力的控制下，可以讓本發明之實施例1~4的多孔性發泡金屬孔徑大小較為一致，特別如實施例3~4，其孔形分布更是趨於窄分布型態，藉此提升多孔性發泡金屬的機械性能，使其具有較佳耐衝擊、屏蔽及熱阻絕等功效；除此之外，亦可同時提高多
孔性發泡金屬的孔洞體積分率，使其不僅能有較佳的機械性質，且其在受到外力衝擊時，更因其受力較平均而能具有更優異的耐衝擊性。
It can be seen from the above-mentioned FIGS. 5 a to 5 e and Table 1 that, compared with the prior art, under the control of temperature and pressure, the porous metal foamed metal pore sizes of the
由於本發明之發泡金屬的製造方法的中間發泡製程可將該發泡金屬熔湯進行溫度控制及壓力保持，且可輔助注入氣體，因此可使氣泡與該發泡金屬熔湯有效充分的接觸，氣泡比較均勻地分布在該發泡金屬熔湯中，進而改善多孔性發泡金屬孔隙的均匀性。據此，本發明之發泡金屬的製造方法及設備可得到機械性能更好、密度更均勻的多孔性發泡金屬，是對目前的發泡金屬的製造方法及設備之有效的改進。 Since the intermediate foaming process of the manufacturing method of foamed metal of the present invention can control the temperature and maintain the pressure of the molten metal, and can assist in the injection of gas, the bubbles and the molten metal can be effectively and fully formed. Contact, the bubbles are relatively uniformly distributed in the molten metal foam, thereby improving the uniformity of the pores of the porous metal foam. Accordingly, the metal foam manufacturing method and equipment of the present invention can obtain porous metal foam with better mechanical properties and more uniform density, which is an effective improvement over the current metal foam manufacturing method and equipment.
綜上所述，乃僅記載本發明為呈現解決問題所採用的技術手段之較佳實施方式或實施例而已，並非用來限定本發明專利實施之範圍。即凡與本發明專利申請範圍文義相符，或依本發明專利範圍所做的均等變化與修飾，皆為本發明專利範圍所涵蓋。 To sum up, the present invention merely describes the preferred embodiments or examples of the technical means adopted by the present invention to solve the problem, and is not intended to limit the scope of the patent implementation of the present invention. That is, all the equivalent changes and modifications that are consistent with the context of the scope of the patent application of the present invention, or made in accordance with the scope of the patent of the present invention, are all covered by the scope of the patent of the present invention.
10:金屬熔湯 10: Metal Molten Soup
11:氣泡 11: Bubbles
12:流量控制閥 12: Flow control valve
2:注氣發泡爐 2: Gas injection foaming furnace
21:主要注氣口 21: Main air injection port
22:內部 22: Inside
23:氣體供應器 23: Gas supply
3:中間發泡室 3: Intermediate foaming chamber
30:發泡控制組件 30: Foaming control components
311:外部 311: External
312:內部 312: Internal
32:計時器 32: Timer
321:熔湯入口 321: molten soup entrance
322:熔湯出口 322: molten soup outlet
35:輔助注氣口 35: Auxiliary gas injection port
36:壓力感測器 36: Pressure sensor
37:處理器 37: Processor
38:溫度感測器 38: Temperature sensor
39:加熱器 39: Heater
4:鑄造裝置 4: Casting device
Claims (8)
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