TWI689482B - Runner protection tube for casting and manufacturing method thereof - Google Patents
Runner protection tube for casting and manufacturing method thereof Download PDFInfo
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本發明是有關於一種鑄造用澆道保護管及其製造方法，且特別是有關於一種在造模過程中不易破損的鑄造用澆道保護管及其製造方法。The invention relates to a casting sprue protection tube and a manufacturing method thereof, and particularly relates to a casting sprue protection tube and a manufacturing method thereof which are not easily damaged during the molding process.
鑄造用澆道保護管為鑄造業廣泛使用的技術之一。現有技術中，通常都採用陶瓷等耐火材料製作鑄造用澆道保護管，其製作過程是先製成管狀生坯，乾燥後進行高溫燒製成耐火陶瓷管。使用鑄造用澆道保護管時，將其埋入型砂內，以成為鐵水進入型腔的通道。鑄造用澆道保護管的基本功能是確保鐵水流動過程中不會造成沖砂、黏砂，鐵水冷卻後不黏鐵、不黏砂。實質上，鑄造用澆道保護管是利用材料的耐火性質使鐵水與型砂隔離，以達到上述目的。然而，若產品韌性不夠高，則可能在造模過程中破損，且產品的重量一致性及厚薄度均一性也很重要。此外，整型過程中所造成的黏模問題，也可能導致製程上的不便利性。Casting runner protection pipe is one of the technologies widely used in foundry industry. In the prior art, refractory materials such as ceramics are usually used to make the runner protective tube for casting. The manufacturing process is to first make a tubular green body, dry it and then burn it at high temperature to make a refractory ceramic tube. When using a casting sprue protection tube, bury it in the molding sand to become a channel for molten iron to enter the cavity. The basic function of the casting sprue protection tube is to ensure that the molten iron will not cause sand flushing and sticky sand during the flow of the molten iron, and the molten iron will not stick to the iron or sand after cooling. In essence, the casting sprue protection tube uses the refractory properties of the material to isolate the molten iron from the molding sand to achieve the above purpose. However, if the toughness of the product is not high enough, it may be damaged during the molding process, and the consistency of the weight and the uniformity of the thickness of the product are also important. In addition, the mold sticking problem caused during the shaping process may also cause inconvenience in the manufacturing process.
基於上述，發展出一種在造模過程中不易破損的鑄造用澆道保護管，同時降低生產成本，為目前所需研究的重要課題。Based on the above, the development of a casting sprue protection tube that is not easily damaged during the molding process, while reducing production costs, is an important subject of current research.
本發明提供一種鑄造用澆道保護管及其製造方法，所述鑄造用澆道保護管在造模過程中不易破損，且可改善產品的重量一致性及厚薄度均一性。The invention provides a casting sprue protection tube and a manufacturing method thereof. The casting sprue protection tube is not easy to be damaged during the molding process, and can improve the weight consistency and thickness uniformity of the product.
本發明的鑄造用澆道保護管是由漿料組成物製成，漿料組成物包括有機纖維、無機纖維、熱固性樹脂、熱塑性樹脂、無機粒子及無機黏結劑。以漿料組成物的總重量計，有機纖維的使用量為26 wt%至40 wt%，其中無機纖維包括CaO-MgO系的陶瓷纖維。The casting runner protection tube of the present invention is made of a slurry composition, which includes organic fibers, inorganic fibers, thermosetting resins, thermoplastic resins, inorganic particles, and inorganic binders. Based on the total weight of the slurry composition, the amount of organic fibers used is 26 wt% to 40 wt%, where the inorganic fibers include CaO-MgO-based ceramic fibers.
在本發明的一實施例中，以漿料組成物的總重量計，無機纖維的使用量為5 wt%以下，熱固性樹脂的使用量為10 wt%以下，熱塑性樹脂的使用量為10 wt%以下，無機粒子的使用量為10 wt%至40 wt%，無機黏結劑的使用量為5 wt%以下。In an embodiment of the present invention, based on the total weight of the slurry composition, the usage of inorganic fibers is 5 wt% or less, the usage of thermosetting resin is 10 wt% or less, and the usage of thermoplastic resin is 10 wt% Below, the amount of inorganic particles used is 10 wt% to 40 wt%, and the amount of inorganic binder used is 5 wt% or less.
在本發明的一實施例中，有機纖維包括紙漿。In an embodiment of the invention, the organic fibers include pulp.
在本發明的一實施例中，熱固性樹脂包括酚醛樹脂。In an embodiment of the invention, the thermosetting resin includes phenolic resin.
在本發明的一實施例中，熱塑性樹脂包括乙烯醋酸乙烯酯共聚物、聚乙烯醇或醋酸乙烯酯。In an embodiment of the present invention, the thermoplastic resin includes ethylene vinyl acetate copolymer, polyvinyl alcohol, or vinyl acetate.
在本發明的一實施例中，無機粒子包括土狀石墨、雲母粉、矽灰粉或二氧化矽。In an embodiment of the invention, the inorganic particles include earthy graphite, mica powder, silica fume powder, or silica.
在本發明的一實施例中，無機黏結劑包括矽酸膠液。In an embodiment of the invention, the inorganic binder includes silicic acid glue.
本發明的鑄造用澆道保護管的製造方法包括以下步驟，用於製造上述鑄造用澆道保護管。將有機纖維、無機纖維、熱固性樹脂、热塑性樹脂、無機粒子及無機黏結劑依序加入水中攪拌均勻以製備漿料，並加水稀釋漿料。以漿料組成物的總重量計，有機纖維的使用量為26 wt%至40 wt%，其中無機纖維包括CaO-MgO系的陶瓷纖維。之後，通過成型模具對所述漿料機械成型，以形成鑄造用澆道保護管的濕紙坯體。然後，對濕紙坯體進行烘乾與熱壓整形製程，以製成鑄造用澆道保護管。The manufacturing method of the casting sprue protection pipe of the present invention includes the following steps for manufacturing the casting sprue protection pipe. Organic fibers, inorganic fibers, thermosetting resins, thermoplastic resins, inorganic particles and inorganic binders are added to the water in sequence and stirred to prepare a slurry, and the slurry is diluted with water. Based on the total weight of the slurry composition, the amount of organic fibers used is 26 wt% to 40 wt%, where the inorganic fibers include CaO-MgO-based ceramic fibers. After that, the slurry is mechanically molded by a molding die to form a wet paper blank of a casting sprue protection tube. Then, the wet paper blank is dried and hot-pressed to form a runner protection tube for casting.
在本發明的一實施例中，加水稀釋漿料，稀釋至水料比為25 %至40 %。In an embodiment of the present invention, the slurry is diluted with water to a water to material ratio of 25% to 40%.
在本發明的一實施例中，熱壓整形製程的壓力為10 Kg/cm 3至20 Kg/cm 3。 In an embodiment of the present invention, the pressure of the hot pressing shaping process is 10 Kg/cm 3 to 20 Kg/cm 3 .
基於上述，本發明提出一種鑄造用澆道保護管，其中包含可增加結構強度的生物可分解CaO-MgO系陶瓷纖維，並提高有機纖維的使用量，以增加產品韌性，在造模過程中不易破損。同時，本發明提出一種鑄造用澆道保護管的製造方法，用於製造上述鑄造用澆道保護管，其中提高整形壓力，以有效克服提高有機纖維使用量可能導致的密度下降問題，更可改善整形過程中的黏模問題。Based on the above, the present invention proposes a casting sprue protection tube, which contains biodegradable CaO-MgO ceramic fibers that can increase the structural strength, and increase the amount of organic fibers used to increase the toughness of the product, which is not easy in the molding process damaged. At the same time, the present invention proposes a method for manufacturing a sprue protection tube for casting, which is used to manufacture the above-mentioned sprue protection tube, in which the shaping pressure is increased to effectively overcome the density reduction problem that may be caused by increasing the amount of organic fiber used, and can be improved The problem of sticky mold during plastic surgery.
為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the following embodiments are specifically described as follows.
以下，將詳細描述本發明的實施例。然而，這些實施例為例示性，且本發明揭露不限於此。Hereinafter, embodiments of the present invention will be described in detail. However, these embodiments are illustrative, and the disclosure of the present invention is not limited thereto.
本發明提供一種鑄造用澆道保護管，其由用於形成鑄造用澆道保護管的漿料組成物製成，漿料組成物包括有機纖維、無機纖維、熱固性樹脂、熱塑性樹脂、無機粒子及無機黏結劑。以下將詳細說明所提到的成分。 ＜ 有機纖維 ＞ The invention provides a casting sprue protection tube, which is made of a slurry composition for forming a casting sprue protection tube. The slurry composition includes organic fibers, inorganic fibers, thermosetting resins, thermoplastic resins, inorganic particles and Inorganic binder. The mentioned ingredients will be explained in detail below. < organic fiber >
本發明的有機纖維可包括紙漿，例如是廢紙紙漿，亦即，可將廢紙與水製備成紙漿。因此，本發明可將廢紙進行回收二次利用，符合現今產業所提倡的環保與綠能需求。但本發明不以此為限，亦可以是其他材料，例如紙纖維、再生纖維、木材纖維、木棉、竹纖維、稻草等。以漿料組成物的總重量計，有機纖維的使用量例如是26 wt%至40 wt%。當有機纖維的使用量在上述範圍時，透過提升有機纖維含量可有效地提高產品韌性，在造模過程中不易破損。 ＜ 無機纖維 ＞ The organic fiber of the present invention may include pulp, for example, waste paper pulp, that is, waste paper and water may be prepared into pulp. Therefore, the invention can recycle and reuse the waste paper, which meets the environmental protection and green energy requirements advocated by the industry today. However, the present invention is not limited to this, and may also be other materials, such as paper fibers, recycled fibers, wood fibers, kapok, bamboo fibers, straw, and the like. The use amount of the organic fiber is, for example, 26 wt% to 40 wt% based on the total weight of the slurry composition. When the amount of organic fiber used is within the above range, the toughness of the product can be effectively improved by increasing the content of organic fiber, and it is not easy to be damaged during the molding process. < Inorganic fiber >
本發明的無機纖維可包括陶瓷纖維，以漿料組成物的總重量計，無機纖維的使用量例如是5 wt%以下。當無機纖維的使用量在上述範圍時，透過降低無機纖維使用量，在裁切或使用過程中，可避免無機纖維沾附在人體皮膚表面刺激皮膚。更具體而言，本發明所使用的陶瓷纖維例如是CaO-MgO系的陶瓷纖維，相較於習知技術中使用矽酸鋁陶瓷纖維、鋯矽酸鋁陶瓷纖維、石綿或玻璃纖維等致癌物或潛在的致癌物，本發明選用人體更容易排出的CaO-MgO系的陶瓷纖維，其為一種生物可分解纖維。因此，本發明在提升鑄造用澆道保護管的結構強度及耐火度的同時，更兼顧對人體的無毒性及環境友善性。但本發明不以此為限，亦可以是其他材料，例如陶瓷纖維、礦物纖維、矽土纖維、金屬纖維、玻璃纖維、碳纖維等。 ＜ 熱固性樹脂 ＞ The inorganic fibers of the present invention may include ceramic fibers, and the amount of inorganic fibers used is, for example, 5 wt% or less based on the total weight of the slurry composition. When the amount of inorganic fibers used is within the above range, by reducing the amount of inorganic fibers used, during cutting or use, the inorganic fibers can be prevented from adhering to the skin surface of the human body and irritating the skin. More specifically, the ceramic fibers used in the present invention are, for example, CaO-MgO-based ceramic fibers, which are carcinogens such as aluminum silicate ceramic fibers, zirconium aluminum silicate ceramic fibers, asbestos, or glass fibers, as compared to conventional techniques. Or a potential carcinogen, the present invention uses CaO-MgO ceramic fibers that are more easily excreted by the human body, which is a biodegradable fiber. Therefore, the present invention improves the structural strength and refractoriness of the casting sprue protection tube, and at the same time takes into account non-toxicity to the human body and environmental friendliness. However, the present invention is not limited thereto, and may also be other materials, such as ceramic fibers, mineral fibers, silica fibers, metal fibers, glass fibers, carbon fibers, and the like. < Thermosetting resin >
本發明的熱固性樹脂可包括酚醛樹脂，以漿料組成物的總重量計，熱固性樹脂的使用量例如是10 wt%以下。當熱固性樹脂的使用量在上述範圍時，透過降低熱固性樹脂使用量，可避免整形過程中樹脂沾附在模具上，有效地防止清潔耗時的缺點。熱固性樹脂在本發明鑄造用澆道保護管的製造中可作為有機黏結劑。必須說明的是，本發明所使用的酚醛樹脂是目前所知耐火溫度最高的熱固形樹脂，也是碳化率最高的樹脂，在缺氧情況下酚醛樹脂遇高溫會乾餾變成炭化物，而炭化物具有耐高溫的特性。同時，酚醛樹脂也具有防潮功能，添加適量的酚醛樹脂可讓紙纖維防潮。因此，本發明使用酚醛樹脂作為熱固性樹脂以製作鑄造用澆道保護管，能夠提升鑄造用澆道保護管的耐火溫度及防潮性。但本發明不以此為限，亦可以是其他材料，例如澱粉、糊精、玉米糖膠。 ＜ 熱塑性樹脂 ＞ The thermosetting resin of the present invention may include a phenol resin, and the amount of the thermosetting resin used is, for example, 10 wt% or less based on the total weight of the slurry composition. When the amount of thermosetting resin is in the above range, by reducing the amount of thermosetting resin, the resin can be avoided from adhering to the mold during the shaping process, effectively preventing the disadvantages of time-consuming cleaning. The thermosetting resin can be used as an organic binder in the manufacture of the casting sprue protection tube of the present invention. It must be noted that the phenolic resin used in the present invention is currently known as the thermosetting resin with the highest refractory temperature, and also the resin with the highest carbonization rate. In the absence of oxygen, the phenolic resin will dry distill into a carbonized substance under high temperature, and the carbonized substance has high temperature resistance Characteristics. At the same time, phenolic resin also has a moisture-proof function. Adding an appropriate amount of phenolic resin can make the paper fiber moisture-proof. Therefore, the present invention uses a phenolic resin as a thermosetting resin to make a casting sprue protection tube, which can improve the fire resistance temperature and moisture resistance of the casting sprue protection tube. However, the present invention is not limited to this, and may also be other materials, such as starch, dextrin, and corn sugar gum. < Thermoplastic resin >
本發明的熱塑性樹脂可包括乙烯醋酸乙烯酯共聚物（EVA）、聚乙烯醇（PVA）或醋酸乙烯酯，以漿料組成物的總重量計，熱塑性樹脂的使用量例如是10 wt%以下。熱塑性樹脂在本發明鑄造用澆道保護管的製造中可作為有機黏結劑及紙張增強劑，不但有助於後段整形製程且具有防水性，更具有增加紙張強度的作用。 ＜ 無機粒子 ＞ The thermoplastic resin of the present invention may include ethylene vinyl acetate copolymer (EVA), polyvinyl alcohol (PVA), or vinyl acetate. Based on the total weight of the slurry composition, the amount of the thermoplastic resin used is, for example, 10 wt% or less. The thermoplastic resin can be used as an organic binder and a paper reinforcing agent in the manufacture of the casting sprue protection tube of the present invention, which not only contributes to the post-stage shaping process and is waterproof, but also has the effect of increasing the strength of the paper. < Inorganic particles >
本發明的無機粒子可包括土狀石墨、雲母粉、矽灰粉或二氧化矽，以漿料組成物的總重量計，無機粒子的使用量例如是10 wt%至40 wt%。更詳細而言，石墨在缺氧情況下耐溫超過2000℃甚至更可以達到2200℃，在鑄件裏頭就是屬於缺氧狀態。雲母在950℃會有相變化，變成具有陶瓷效果的材質，可以增加熱間強度，但也不能添加太多，因為相變過程是容易被鐵水穿刺的時間點，若過度陶瓷化則有礙後續製程的進行。矽灰粉即為一般常用之飛灰(fly ash)，其為火力發電廠在燃燒粉碳後所產生的廢棄物，當粉煤在經過火爐高溫區域時，揮發性物質被燒掉，而存在粉煤中之黏土與石英等礦物雜質在高溫下被融化，其中產生之氫氣與氮氣會將融化物鼓起，形成中空體或破裂中空體，這些物質最後被送到低溫區，經冷卻變成玻璃圓球狀微粒子，大部分微粒子會隨著高溫排出，並利用集塵器捕捉收集而成。二氧化矽為常見便宜的耐火材，因為材質跟鑄造用砂模一樣，所以有相同的膨脹係數。但本發明不以此為限，亦可以是其他材料，例如石英粉、三水鋁石、氧化鋁、氧化鎂、鋯英粉、臘石粉、滑石粉、長石粉、高嶺土、橄欖石粉、空心氧化鋁等。 ＜ 無機黏結劑 ＞ The inorganic particles of the present invention may include earthy graphite, mica powder, silica fume powder, or silica, based on the total weight of the slurry composition, the amount of inorganic particles used is, for example, 10 wt% to 40 wt%. In more detail, graphite can withstand temperatures exceeding 2000°C or even 2200°C under anoxic conditions, which is anoxic state in castings. Mica will have a phase change at 950°C and become a material with a ceramic effect, which can increase the heat strength, but it cannot be added too much, because the phase change process is a point of time that is easily punctured by molten iron, and excessive ceramicization will hinder Follow-up process. Silica fume is commonly used fly ash, which is the waste generated by thermal power plants after burning carbon powder. When the pulverized coal passes through the high temperature area of the furnace, volatile substances are burned and exist. The mineral impurities such as clay and quartz in the pulverized coal are melted at high temperature, and the hydrogen and nitrogen generated therein will bulge the melt to form a hollow body or a broken hollow body. These substances are finally sent to the low temperature area and become glass after cooling Spherical particles, most of the particles will be discharged with high temperature and collected by a dust collector. Silicon dioxide is a common cheap refractory material, because the material is the same as the sand mold for casting, so it has the same expansion coefficient. However, the present invention is not limited to this, and may also be other materials, such as quartz powder, gibbsite, alumina, magnesium oxide, zircon powder, wax powder, talc powder, feldspar powder, kaolin, olivine powder, hollow oxidation Aluminum, etc. < Inorganic binder >
本發明的無機黏結劑可包括矽酸膠液，以漿料組成物的總重量計，無機黏結劑的使用量例如是5 wt%以下。更詳細而言，矽酸膠液具有優良的高溫穩定性(熱間強度)、耐高溫1500℃至1600℃、黏結性、成膜性、比表面積大等性能，因此，可改善所製成的鑄造用澆道保護管的高溫穩定性(熱間強度)。但本發明不以此為限，亦可以是其他材料，例如硫酸鹽、磷酸鹽、硼酸鹽、膨潤土等。The inorganic binder of the present invention may include a silicic acid glue, and the amount of the inorganic binder used is, for example, 5 wt% or less based on the total weight of the slurry composition. In more detail, the silicic acid glue has excellent high-temperature stability (heat strength), high temperature resistance of 1500°C to 1600°C, adhesion, film formation, large specific surface area and other properties, so it can improve the The high-temperature stability (heat strength) of the casting sprue protection tube. However, the present invention is not limited to this, and may also be other materials, such as sulfate, phosphate, borate, bentonite, etc.
本發明亦提出製造上述鑄造用澆道保護管的方法，由於漿料組成物中所包含的有機纖維、無機纖維、熱固性樹脂、熱塑性樹脂、無機粒子及無機黏結劑已於上文中詳述，故在說明鑄造用澆道保護管的製造方法時省略有關製造原料的細節描述。The present invention also proposes a method for manufacturing the above-mentioned casting sprue protective tube. Since the organic fiber, inorganic fiber, thermosetting resin, thermoplastic resin, inorganic particles and inorganic binder contained in the slurry composition have been described in detail above, A detailed description of the manufacturing raw materials is omitted when explaining the manufacturing method of the casting sprue protection pipe.
本發明提供一種鑄造用澆道保護管的製造方法，包括以下步驟。The invention provides a method for manufacturing a runner protective pipe for casting, including the following steps.
首先，將有機纖維、無機纖維、熱固性樹脂、熱塑性樹脂、無機粒子及無機黏結劑依序加入水中攪拌均勻以製備漿料。漿料製備完畢之後，排洩到儲存槽，並加水稀釋，稀釋至水料比25 %至40 %。將水料比控制在上述範圍中，可進一步控制厚度，並使製成的成品管厚符合產業需求，所製成的成品管厚例如是2 mm。First, organic fibers, inorganic fibers, thermosetting resins, thermoplastic resins, inorganic particles, and inorganic binders are added to water in sequence and stirred to prepare a slurry. After the slurry preparation is completed, it is drained to the storage tank and diluted with water to a water to material ratio of 25% to 40%. By controlling the water-to-material ratio within the above range, the thickness can be further controlled, and the thickness of the finished product pipe can be made to meet the industrial needs. The thickness of the finished product pipe is, for example, 2 mm.
接著，通過成型模具對漿料機械成型，以形成鑄造用澆道保護管的濕紙坯體。在模具部分，模具結構由左模和右模組成。將成型左模和右模在合模的狀態，定量的漿料注入模具內，再使用離心原理將水分甩出，離心時間例如是15秒至30秒，離心轉速例如是6000 rpm至16000 rpm必須在模具後端加上彈簧及擋板，擋板在離心過程會因離心力而打開，讓水分流出。透過定量搭配離心脫水方法，可提高產品的均勻度，讓每根產品的重量一致且厚薄度均一。Next, the slurry is mechanically molded by a molding die to form a wet paper blank of a casting sprue protection tube. In the mold part, the mold structure is composed of a left mold and a right mold. Put the left mold and the right mold in the closed state, the quantitative slurry is injected into the mold, and then the centrifugal principle is used to throw out the water. The centrifugation time is for example 15 seconds to 30 seconds. The centrifugal speed is for example 6000 rpm to 16000 rpm. A spring and a baffle are added to the rear end of the mold. The baffle will be opened due to centrifugal force during the centrifugal process, allowing moisture to flow out. By quantitatively matching the centrifugal dehydration method, the uniformity of the product can be improved, so that the weight of each product is uniform and the thickness is uniform.
之後，對濕紙坯體進行低溫烘乾及熱壓整形，以製成鑄造用澆道保護管。更詳細而言，使用金屬模作為乾燥模，於金屬模上形成連通模腔形成面與外部之多個連通孔。將半乾至八分乾紙坯體移載至加熱至120℃至200℃之乾燥模中，並且自乾燥模之上方開口部插入袋狀之彈性模芯，於密閉之乾燥模內，對彈性模芯內注入加壓空氣(10 Kg/cm 3至20 Kg/cm 3)，使彈性模芯膨脹，利用彈性模芯將濕紙坯體按壓至乾燥模之內面，提高鑄造用澆道保護管密度與結構強度，並加以整形。由於熱壓整型製程的壓力提高至10 Kg/cm 3至20 Kg/cm 3，因此，可改善漿料中有機纖維含量增加可能導致的密度下降缺點，使產品密度維持在例如0.9 g/cm 3至1.0g/cm 3。此外，整形壓力在上述範圍中，也可提高抗壓強度，使密度更紮實，因此，可以改善整形過程中造成的黏模問題，使用更少的樹脂也可達到一樣的強度。進行加壓乾燥(60秒鐘至180秒鐘)後，除去彈性模芯內之加壓空氣，使彈性模芯收縮，自乾燥模內取出，將成型體自乾燥模內取出，再使用烘箱以100℃至150℃乾燥10分鐘至1小時，以製成鑄造用澆道保護管。 After that, the wet paper blank is dried at low temperature and hot-pressed to form a runner protection tube for casting. In more detail, a metal mold is used as the drying mold, and a plurality of communication holes communicating the cavity forming surface and the outside are formed on the metal mold. Transfer the semi-dry to eight-point dry paper blank to a drying mold heated to 120°C to 200°C, and insert a bag-shaped elastic core from the upper opening of the drying mold, in a closed drying mold Pressurized air (10 Kg/cm 3 to 20 Kg/cm 3 ) is injected into the core to expand the elastic core. The elastic core presses the wet paper blank to the inner surface of the dry mold to improve the protection of the casting runner Tube density and structural strength are shaped. Since the pressure of the hot-pressing process is increased to 10 Kg/cm 3 to 20 Kg/cm 3 , it can improve the disadvantage of density reduction caused by the increase of organic fiber content in the slurry, and maintain the product density at, for example, 0.9 g/cm 3 to 1.0 g/cm 3 . In addition, the shaping pressure in the above range can also increase the compressive strength and make the density more solid. Therefore, the sticking problem caused by the shaping process can be improved, and the same strength can be achieved by using less resin. After pressure drying (60 seconds to 180 seconds), remove the pressurized air in the elastic core, shrink the elastic core, take it out of the drying mold, take out the molded body from the drying mold, and then use the oven to Dry at 100°C to 150°C for 10 minutes to 1 hour to make a runner protective tube for casting.
綜上所述，本發明提出一種鑄造用澆道保護管，其中包含可增加結構強度的生物可分解CaO-MgO系陶瓷纖維，並提高有機纖維的使用量，以增加產品韌性，在造模過程中不易破損，更降低無機纖維使用量，在裁切或使用過程中，可避免無機纖維沾附在人體皮膚表面刺激皮膚。同時，本發明提出一種鑄造用澆道保護管的製造方法，用於製造上述鑄造用澆道保護管，其中提高整形壓力，以有效克服提高有機纖維使用量可能導致的密度下降問題，更可改善整形過程中的黏模問題，使用更少的樹脂也可達到一樣的強度，進而提升製程上的方便性並避免清潔耗時的缺點。In summary, the present invention proposes a casting sprue protection tube, which includes biodegradable CaO-MgO ceramic fibers that can increase structural strength, and increase the amount of organic fibers used to increase product toughness during the molding process It is not easy to be damaged, and it reduces the amount of inorganic fibers used. During cutting or use, inorganic fibers can be prevented from adhering to the skin surface to stimulate the skin. At the same time, the present invention proposes a method for manufacturing a sprue protection tube for casting, which is used to manufacture the above-mentioned sprue protection tube, in which the shaping pressure is increased to effectively overcome the problem of density reduction caused by increasing the amount of organic fiber used, and can be improved With regard to the sticky mold problem during the shaping process, using less resin can also achieve the same strength, thereby improving the convenience in the manufacturing process and avoiding the disadvantage of time-consuming cleaning.
雖然本發明已以實施例揭露如上，然其並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明的精神和範圍內，當可作些許的更動與潤飾，故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.
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| CN107716843A (en) * | 2012-12-28 | 2018-02-23 | 花王株式会社 | The structure such as the manufacture method of structure for casting production and casting mold |
| TW201900296A (en) * | 2017-05-09 | 2019-01-01 | 皇廣鑄造發展股份有限公司 | Runner protection tube for casting and manufacturing method thereof |
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| CN107716843A (en) * | 2012-12-28 | 2018-02-23 | 花王株式会社 | The structure such as the manufacture method of structure for casting production and casting mold |
| TW201900296A (en) * | 2017-05-09 | 2019-01-01 | 皇廣鑄造發展股份有限公司 | Runner protection tube for casting and manufacturing method thereof |
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