JP4994179B2 - Lattice substrate casting equipment for lead-acid batteries - Google Patents
Lattice substrate casting equipment for lead-acid batteries Download PDFInfo
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- JP4994179B2 JP4994179B2 JP2007263439A JP2007263439A JP4994179B2 JP 4994179 B2 JP4994179 B2 JP 4994179B2 JP 2007263439 A JP2007263439 A JP 2007263439A JP 2007263439 A JP2007263439 A JP 2007263439A JP 4994179 B2 JP4994179 B2 JP 4994179B2
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- 238000005266 casting Methods 0.000 title claims description 36
- 239000000758 substrate Substances 0.000 title claims description 30
- 239000002253 acid Substances 0.000 title claims description 11
- 238000001816 cooling Methods 0.000 claims description 20
- 125000006850 spacer group Chemical group 0.000 description 16
- 238000009826 distribution Methods 0.000 description 14
- 230000007547 defect Effects 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
- 239000011800 void material Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000011835 investigation Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000978 Pb alloy Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
本発明は、鋳造欠陥が生じ難い鉛蓄電池用格子基板の鋳造装置に関する。 The present invention relates to an apparatus for casting a grid substrate for a lead storage battery that is less prone to casting defects.
鉛蓄電池用格子基板の鋳造装置は、図４に示すように、固定鋳型１１と移動鋳型１２を一体的に組み合わせたブックモールド式鋳型（組み合わせた状態は図示せず)を主要部とし、前記鋳型の湯口（１１ａ、１２ａ）から鋳型内部の格子基板形状の空洞部（キャビティ：１１ｂ、１２ｂ）内に鉛合金溶湯を注入して格子基板を鋳造する装置である。そして固定鋳型１１および移動鋳型１２には鋳型温度を制御するための主要ヒーター２と冷却管３が設けられている（特許文献１、２）。主要ヒーター２には、例えば、金属製のヒーターボックス２ａに電熱線などの発熱体２ｂを内蔵させたものが用いられる。
図４で、１３は両鋳型を位置合わせするためのガイド棒、１４はガイド孔である。
As shown in FIG. 4, the lead-acid battery grid substrate casting apparatus has a book mold type mold (combined state not shown) in which a fixed mold 11 and a movable mold 12 are integrally combined as a main part. This is a device for casting a lattice substrate by injecting molten lead alloy into the cavity portion (cavities: 11b, 12b) in the shape of a lattice substrate inside the mold from the gates (11a, 12a). The fixed mold 11 and the moving mold 12 are provided with a main heater 2 and a cooling pipe 3 for controlling the mold temperature (Patent Documents 1 and 2). As the main heater 2, for example, a metal heater box 2a in which a heating element 2b such as a heating wire is incorporated is used.
In FIG. 4, 13 is a guide rod for aligning both molds, and 14 is a guide hole.
前記鋳型は、固定鋳型１１と移動鋳型１２の所要箇所に熱電対を埋め込んで鋳型温度を測定し、その測定結果に応じて前記主要ヒーター（発熱体）の発熱量および冷却管３内の冷媒の流量を調節して所定の温度に制御される。 The mold measures the mold temperature by embedding thermocouples in the required locations of the stationary mold 11 and the moving mold 12, and the amount of heat generated by the main heater (heating element) and the refrigerant in the cooling pipe 3 are measured according to the measurement result. The flow rate is adjusted and controlled to a predetermined temperature.
近年、自動車の装備品の電動化やエンジンルーム内の余剰空間の排除などから、消費電力が増加し、エンジンルーム内の温度上昇が顕著になり、自動車用鉛蓄電池は極めて苛酷な条件で使用されるようになった。その結果、鉛蓄電池は正極基板が腐食し易くなり電池の寿命が短くなってきている。 In recent years, the power consumption has increased due to the electrification of automobile equipment and the elimination of excess space in the engine room, and the temperature rise in the engine room has become remarkable. Lead-acid batteries for automobiles are used under extremely severe conditions. It became so. As a result, in the lead storage battery, the positive electrode substrate is easily corroded, and the life of the battery is shortened.
本発明者は前記正極基板の早期腐食の原因について検討し、それが格子基板の局部的凝固遅れ（焼き折れを誘発）やボイド（ガス孔）集合（ボイド折れを誘発）などの鋳造欠陥にあること、前記鋳造欠陥は鋳型温度の均一化（鋳型温度の中央部と端部との温度分布の緩和）により防止できることを突き止め、さらに検討を進めて本発明を完成させるに至った。
本発明は、鋳造欠陥が生じ難い鉛蓄電池用格子基板の鋳造装置の提供を目的とする。
The present inventor has examined the cause of the early corrosion of the positive electrode substrate, which is found in casting defects such as local solidification delay (causes burning breakage) and void (gas hole) aggregation (causes void breakage) of the lattice substrate. In addition, the present inventors have found out that the casting defects can be prevented by making the mold temperature uniform (relaxation of the temperature distribution between the central part and the end part of the mold temperature), and have further studied and completed the present invention.
An object of this invention is to provide the casting apparatus of the grid | lattice board | substrate for lead acid batteries which a casting defect does not produce easily.
請求項１に記載した発明は、固定鋳型と移動鋳型からなる鋳型を主要部とし、前記固定鋳型と移動鋳型にはそれぞれ鋳型中央部より下方に主要ヒーターが設けられ、前記鋳型中央部より上方に冷却管が設けられた鉛蓄電池用格子基板の鋳造装置において、前記固定鋳型と移動鋳型の少なくとも一方に補助ヒーターを設け、且つ、前記補助ヒーターは前記固定鋳型と移動鋳型の少なくとも一方の中央部より上方の端部に設けられていることを特徴とする鉛蓄電池用格子基板の鋳造装置である。 The invention described in claim 1 is characterized in that a mold composed of a fixed mold and a moving mold is a main part, and each of the fixed mold and the moving mold is provided with a main heater below the center part of the mold, and above the center part of the mold. In a lead-acid battery grid substrate casting apparatus provided with a cooling pipe, at least one of the fixed mold and the movable mold is provided with an auxiliary heater, and the auxiliary heater is provided at the center of at least one of the fixed mold and the movable mold. A lead-acid battery grid substrate casting apparatus, wherein the apparatus is provided at an upper end.
請求項２に記載した発明は、前記補助ヒーターが冷却管の下方に設けられていることを特徴とする請求項１に記載の鉛蓄電池用格子基板の鋳造装置である。 The invention described in claim 2 is the lead-acid battery grid substrate casting apparatus according to claim 1, wherein the auxiliary heater is provided below the cooling pipe.
本発明の鋳造装置は、固定鋳型と移動鋳型からなる鋳型を主要部とし、前記固定鋳型と移動鋳型にはそれぞれ鋳型中央部より下方に主要ヒーターが設けられ、前記鋳型中央部より上方に冷却管が設けられた鉛蓄電池用格子基板の鋳造装置において、前記固定鋳型と移動鋳型の少なくとも一方に補助ヒーターが前記鋳型中央部より上方に設けられており、前記補助ヒーターにより前記鋳型温度の中央部と端部との温度分布を緩和することができる。従って、本発明の鋳造装置によれば焼き折れ、ボイド折れ、クラックなどの鋳造欠陥が生じ難い高品質の格子基板が得られる。 The casting apparatus according to the present invention has a fixed mold and a moving mold as a main part, and the fixed mold and the moving mold are each provided with a main heater below the center part of the mold, and a cooling pipe above the center part of the mold. In an apparatus for casting a lead-acid battery grid substrate, an auxiliary heater is provided above at least one of the fixed mold and the movable mold above the central part of the mold, and the auxiliary heater is provided with a central part of the mold temperature. The temperature distribution with the end can be relaxed. Therefore, according to the casting apparatus of the present invention, it is possible to obtain a high-quality lattice substrate that hardly causes casting defects such as baking, void folding, and cracks.
本発明の鋳造装置は、前記補助ヒーターを前記冷却管よりも下方に設けることにより鋳型温度の中央部と端部との温度分布を、更に緩和することができる。 In the casting apparatus of the present invention, the temperature distribution between the central portion and the end portion of the mold temperature can be further relaxed by providing the auxiliary heater below the cooling pipe.
本発明の鋳造装置は、鋳型を構成する固定鋳型と移動鋳型の少なくとも一方に補助ヒーターを設けたものであり、ここでは移動鋳型について説明する。
移動鋳型は、図１に示すように、その中央部分（鋳型の中央部分）１ａより下方の外面１ｂに主要ヒーター２が設けられ、中央部１ａより上方に冷却管３が移動鋳型１を横方向に貫通して設けられ、さらに移動鋳型中央部１ａより上方の外面１ｃに鋳型の幅方向に細長に形成された補助ヒーター４が、その両端に熱導電性のスペーサー５を配して設けられて、鋳型の両端部を加熱するものである。スペーサー５を用いることにより、加熱部分の形状を任意にし得、補助ヒーターの形状を変えるより容易に温度分布を均一に制御することが出来る。
The casting apparatus of the present invention is provided with an auxiliary heater in at least one of a fixed mold and a moving mold constituting the mold. Here, the moving mold will be described.
As shown in FIG. 1, the moving mold is provided with a main heater 2 on the outer surface 1b below the center portion (the center portion of the mold) 1a, and the cooling pipe 3 extends the moving mold 1 laterally above the center portion 1a. Auxiliary heaters 4 are formed on the outer surface 1c above the moving mold central portion 1a and are elongated in the width direction of the mold with thermal conductive spacers 5 arranged at both ends thereof. The both ends of the mold are heated. By using the spacer 5, the shape of the heating portion can be made arbitrary, and the temperature distribution can be uniformly controlled more easily than changing the shape of the auxiliary heater.
図１に示した移動鋳型１では補助ヒーター４は冷却管３とほぼ同じ高さに位置しているが、図２に示すように補助ヒーター４を冷却管３より下方に位置させてキャビティ（図示せず）に近接させると鋳型の温度分布をより良好にすることができる。 In the moving mold 1 shown in FIG. 1, the auxiliary heater 4 is positioned at almost the same height as the cooling pipe 3, but the auxiliary heater 4 is positioned below the cooling pipe 3 as shown in FIG. (Not shown), the temperature distribution of the mold can be improved.
本発明の鋳造装置では、鋳造中、鋳型の温度を測定し、その結果に応じて、主要ヒーター２と補助ヒーター４の発熱量および冷却管３の冷媒流量を調節して鋳型温度を所定温度にする。前記鋳型温度は鋳型の所要個所に熱電対を埋め込むなど任意の方法により測定する。 In the casting apparatus of the present invention, the temperature of the mold is measured during casting, and according to the result, the heat generation amount of the main heater 2 and the auxiliary heater 4 and the refrigerant flow rate of the cooling pipe 3 are adjusted to bring the mold temperature to a predetermined temperature. To do. The mold temperature is measured by an arbitrary method such as embedding a thermocouple in a required part of the mold.
一般に、鋳型は、鋳造を繰り返すうちに中央部分の温度が高くなるが、本発明では、補助ヒーター４の両端にスペーサー５を配し、鋳型の端部を加熱して鋳型上部の横方向の温度分布を均一化する。
具体的には、図１に示すように、スペーサー５により補助ヒーター４の中央部分と鋳型間に間隙を開けて鋳型中央部分の加熱を弱めて鋳型の横方向の温度分布を均一化する。
この場合スペーサーには銅、アルミ、鉄などの高熱伝導性金属材料を用いて、補助ヒーター両端側の熱伝導を促進させる。
本発明において、補助ヒーター４の中央部分と鋳型（移動鋳型１）間に断熱材を配して中央部分の加熱をさらに弱めることも可能である。
In general, the temperature of the central portion of the mold increases as casting is repeated. In the present invention, spacers 5 are arranged at both ends of the auxiliary heater 4 and the end portions of the mold are heated to increase the lateral temperature at the top of the mold. Uniform distribution.
Specifically, as shown in FIG. 1, the spacer 5 opens a gap between the central portion of the auxiliary heater 4 and the mold to weaken the heating of the central portion of the mold to make the temperature distribution in the lateral direction of the mold uniform.
In this case, a high heat conductive metal material such as copper, aluminum, or iron is used for the spacer to promote heat conduction at both ends of the auxiliary heater.
In the present invention, it is possible to further weaken the heating of the central portion by arranging a heat insulating material between the central portion of the auxiliary heater 4 and the mold (movable mold 1).
スペーサーの材質、厚みなどは鋳型の大きさ、材質などに応じて予め設定する。その形状は三角形、四角形、台形、円形など任意であり、該三角形、台形、円形などのスペーサーは、端部の急激な温度変化、即ち、中央部と端部との温度分布を緩和することが可能である。この内、より好ましくは図示の如く、端部を広くし中央に至に従い先細とした三角形状であり、端部から中央部にかけて該スペーサーと鋳型との接触面積を少なくすることで、より温度分布を均一にすることが可能である。 The material and thickness of the spacer are set in advance according to the size and material of the mold. The shape is arbitrary, such as a triangle, a quadrangle, a trapezoid, and a circle, and spacers such as the triangle, trapezoid, and circle can alleviate a rapid temperature change at the end, that is, the temperature distribution between the center and the end. Is possible. Among these, more preferably, as shown in the figure, the end portion is widened and tapered in the center, and the temperature distribution is further reduced by reducing the contact area between the spacer and the mold from the end portion to the center portion. Can be made uniform.
以上、補助ヒーターを移動鋳型に設ける場合について説明したが、補助ヒーター４を固定鋳型に設けても同様の効果が得られる。更に、補助ヒーター４を移動鋳型と固定鋳型の両方に設けると、より良好な効果が得られる。
また、主要ヒーター２および補助ヒーター４は移動鋳型１に内蔵させても良い。この場合、補助ヒーター４は、前記したスペーサー付きのものを用いるのではなく、夫々所望形状の補助ヒーター４を両端に設けることが好ましい。
また、スペーサー５により補助ヒーター４の中央部分と鋳型間に間隙を開けた場合、即ち、補助ヒーター４が１つの場合について説明したが、補助ヒーター４は両端に夫々設けても良く、この場合、スペーサー５を使用せずに補助ヒーター４を鋳型に当接させても良い。
Although the case where the auxiliary heater is provided on the moving mold has been described above, the same effect can be obtained even if the auxiliary heater 4 is provided on the fixed mold. Furthermore, if the auxiliary heater 4 is provided in both the moving mold and the stationary mold, a better effect can be obtained.
Further, the main heater 2 and the auxiliary heater 4 may be incorporated in the moving mold 1. In this case, it is preferable that the auxiliary heaters 4 are not provided with the spacers described above, and the auxiliary heaters 4 having a desired shape are provided at both ends.
Moreover, although the case where a gap is opened between the central portion of the auxiliary heater 4 and the mold by the spacer 5, that is, the case where there is one auxiliary heater 4, the auxiliary heater 4 may be provided at both ends, in this case, The auxiliary heater 4 may be brought into contact with the mold without using the spacer 5.
以下に本発明を実施例により詳細に説明する。
図１に示した移動鋳型を用いた鋳造装置により鉛格子基板を鋳造し、得られた格子基板について、焼き折れ、ボイド折れ、クラック数を調べた。また、鋳型の温度分布を測定した。
Hereinafter, the present invention will be described in detail with reference to examples.
A lead lattice substrate was cast by a casting apparatus using the moving mold shown in FIG. 1, and the obtained lattice substrate was examined for the number of baked, voided and cracks. In addition, the temperature distribution of the mold was measured.
前記クラックは局部的凝固遅れ部分、或いはボイド集合部分に発生する欠陥で、焼き折れやボイド折れの原因になる欠陥であり、正極腐食を誘発する欠陥である。前記焼き折れまたはボイド折れを生じた格子基板は不良品として排除した。クラック発生品はクラック数が２箇所以下であれば実用上問題がないため良品とした。 The crack is a defect that occurs in a local solidification delay portion or a void assembly portion, and is a defect that causes burning or void breakage, and is a defect that induces positive electrode corrosion. The lattice substrate in which the burn-in or void was broken was excluded as a defective product. A cracked product was determined to be a good product because there was no practical problem if the number of cracks was 2 or less.
固定鋳型および移動鋳型の寸法は、共に、長さ約４５０ｍｍ、高さ約２５０ｍｍ、幅約５０ｍｍである。主要ヒーター２および補助ヒーター４には断面長方形状の銅製筒体に電熱線を内蔵させたヒーターボックスを用いた。主要ヒーターのヒーターボックスの寸法は長さ約３５０ｍｍ、高さ約５０ｍｍ、幅約２５ｍｍ、補助ヒーターのヒーターボックスの寸法は長さ約４００ｍｍ、高さ約５０ｍｍ、幅約２５ｍｍである。 The dimensions of the stationary mold and the moving mold are both about 450 mm in length, about 250 mm in height, and about 50 mm in width. As the main heater 2 and the auxiliary heater 4, a heater box in which a heating wire was built in a copper cylinder having a rectangular cross section was used. The dimensions of the heater box of the main heater are about 350 mm in length, about 50 mm in height, and about 25 mm in width. The dimensions of the heater box in the auxiliary heater are about 400 mm in length, about 50 mm in height, and about 25 mm in width.
補助ヒーター４の両端のスペーサー５には長さ約１００ｍｍ、高さ約５０ｍｍ、肉厚約３ｍｍの鉄製の直角三角形板（図１、２参照）を用いた。このスペーサーにより鋳型外面１ｃと補助ヒーター４間に３ｍｍの間隔が開いた。冷却管３には外径約１０ｍｍ、肉厚約１ｍｍの鉄製の円管を用いた。移動鋳型１と、主要ヒーター２、補助ヒーター４、冷却管３とはそれぞれ螺子止め、またはろう付けにより接合した。 As the spacers 5 at both ends of the auxiliary heater 4, an iron right triangle plate (see FIGS. 1 and 2) having a length of about 100 mm, a height of about 50 mm, and a thickness of about 3 mm was used. This spacer provided a gap of 3 mm between the mold outer surface 1c and the auxiliary heater 4. The cooling pipe 3 was an iron circular pipe having an outer diameter of about 10 mm and a wall thickness of about 1 mm. The moving mold 1, the main heater 2, the auxiliary heater 4, and the cooling pipe 3 were joined by screwing or brazing, respectively.
移動鋳型の中央部の上下の所定箇所に熱電対ａ（図示せず）を各１本ずつ埋め込み、この箇所の温度が１９０℃になるように主要ヒーターおよび補助ヒーターの電源をＯＮ・ＯＦＦさせた。冷却管には３５℃の冷却水を毎分５００ｍｌ流した。 One thermocouple a (not shown) is embedded in each of the upper and lower predetermined locations in the center of the moving mold, and the main heater and auxiliary heater are turned on and off so that the temperature at this location is 190 ° C. . Cooling water of 35 ° C. was flowed through the cooling pipe at 500 ml per minute.
この状態で、鋳型湯口（図示せず）からキャビティ内に約５２０℃の鉛合金溶湯を注入して格子基板を連続して５００個鋳造した。 In this state, about 500 lattice substrates were continuously cast by injecting a molten lead alloy at about 520 ° C. into the cavity from a mold gate (not shown).
得られた格子基板について焼き折れ、ボイド折れ、クラックなどの鋳造欠陥を調べた。また鋳型中央部を挟む上下に熱電対挿入孔（図１、２の６ａ〜６ｃ、７ａ〜７ｃ）を各３個等間隔に設け、そこに熱電対を挿入して鋳造中の鋳型の温度分布を調べた。 The obtained lattice substrate was examined for casting defects such as baking, void bending, and cracks. Also, three thermocouple insertion holes (6a to 6c, 7a to 7c in FIGS. 1 and 2) are provided at equal intervals above and below the center of the mold, and the thermocouples are inserted there to distribute the temperature distribution of the mold during casting. I investigated.
補助ヒーターを冷却管の下方に設けた移動鋳型（図２参照）を用いた他は実施例１と同じ方法により格子基板を製造し、実施例１と同じ調査を行った。 A lattice substrate was manufactured by the same method as in Example 1 except that a moving mold (see FIG. 2) in which an auxiliary heater was provided below the cooling pipe was used, and the same investigation as in Example 1 was performed.
補助ヒーターを固定鋳型にのみ設けた、更に、補助ヒーターを冷却管の下方に設けた鋳造装置を用いた他は実施例１と同じ方法により格子基板を製造し、実施例１と同じ調査を行った。 A lattice substrate was manufactured by the same method as in Example 1 except that a casting apparatus in which an auxiliary heater was provided only on the fixed mold and an auxiliary heater was provided below the cooling pipe was used, and the same investigation as in Example 1 was performed. It was.
補助ヒーターを固定鋳型と移動鋳型の両方に設け、更に、補助ヒーターを冷却管の下方に設けた鋳造装置を用いた他は実施例１と同じ方法により格子基板を製造し、実施例１と同じ調査を行った。 A lattice substrate is manufactured in the same manner as in Example 1 except that a casting apparatus in which an auxiliary heater is provided in both the stationary mold and the moving mold and an auxiliary heater is provided below the cooling pipe is used. We conducted a survey.
［比較例１］
補助ヒーターにスペーサーを設けず、補助ヒーターの全長を鋳型に当接して加熱した移動鋳型を用いた他は実施例１と同じ方法により格子基板を製造し、実施例１と同じ調査を行った。
[Comparative Example 1]
A lattice substrate was manufactured by the same method as in Example 1 except that the auxiliary heater was not provided with a spacer, and a moving mold heated by contacting the entire length of the auxiliary heater with the mold was used, and the same investigation as in Example 1 was performed.
［比較例２］
補助ヒーターのない従来の移動鋳型を用いた他は実施例１と同じ方法により格子基板を製造し、実施例１と同じ調査を行った。
[Comparative Example 2]
A lattice substrate was manufactured by the same method as in Example 1 except that a conventional moving mold without an auxiliary heater was used, and the same investigation as in Example 1 was performed.
実施例１、２および比較例１の鋳造中の鋳型の温度分布を図３に示した。なお、実施例３、４は実施例１、２と同等の鋳造温度変動幅、またはそれより変動幅が小さく、比較例２の温度分布比較例１よりも鋳造温度変動幅が大きいため図示を省略した。 The temperature distribution of the mold during casting in Examples 1 and 2 and Comparative Example 1 is shown in FIG. In Examples 3 and 4, the casting temperature fluctuation range is the same as that in Examples 1 and 2, or the fluctuation range is smaller than that, and the casting temperature fluctuation range is larger than the temperature distribution comparison example 1 of Comparative Example 2, and thus the illustration is omitted. did.
図３から明らかなように、本発明例の実施例１、２は比較例１に比し、いずれも鋳型温度の変動幅が小さかった。これに対し比較例１は鋳型上部の鋳型温度変動幅が大きかった。これは、移動鋳型の鋳型上部に補助ヒーターを設けたものの、補助ヒーター全体が移動鋳型に当接しているため、補助ヒーターが当接された移動鋳型の両端の温度上昇に加え、中央部の温度上昇も起こり、温度分布を一定にすることができなかった。 As is clear from FIG. 3, Examples 1 and 2 of the present invention example had a smaller variation range of the mold temperature than Comparative Example 1. In contrast, Comparative Example 1 had a large mold temperature fluctuation range at the top of the mold. This is because the auxiliary heater is provided on the upper part of the moving mold, but the entire auxiliary heater is in contact with the moving mold. An increase also occurred and the temperature distribution could not be made constant.
実施例１〜４、比較例１、２で製造した格子基板の鋳造欠陥数を表１に示した。表１には鋳型温度の最大変動幅を併記した。 Table 1 shows the number of casting defects of the lattice substrates manufactured in Examples 1 to 4 and Comparative Examples 1 and 2. Table 1 also shows the maximum fluctuation range of the mold temperature.
表１から明らかなように、本発明例（実施例１〜４）はいずれも鋳型温度変動幅が小さく、クラック、焼き折れ、ボイド折れなどの欠陥が減少した。特に実施例２〜４は補助ヒーターを冷却管の下方に設けたため鋳型温度がより均一化して欠陥が大幅に減少した。中でも実施例４は補助ヒーターを移動鋳型と固定鋳型の両方に設けたため鋳型温度が一層均一化して欠陥は皆無となった。 As is apparent from Table 1, all of the inventive examples (Examples 1 to 4) had a small mold temperature fluctuation range, and defects such as cracks, burn-ups and voids were reduced. In particular, in Examples 2 to 4, since the auxiliary heater was provided below the cooling pipe, the mold temperature was made more uniform and the defects were greatly reduced. In particular, in Example 4, since the auxiliary heater was provided in both the moving mold and the stationary mold, the mold temperature was made more uniform and there were no defects.
これに対し、比較例１は補助ヒーターにスペーサーがなかったため、鋳型温度変動幅が大きくなり、焼き折れやボイド折れが多発し、クラック数も増加した。比較例２は補助ヒーターを設けなかったためさらに悪化した。 On the other hand, in Comparative Example 1, since the auxiliary heater did not have a spacer, the mold temperature fluctuation range increased, and many baking breaks and void breaks occurred, and the number of cracks also increased. Comparative Example 2 was further deteriorated because no auxiliary heater was provided.
１ 移動鋳型
１ａ 移動鋳型の中央部
１ｂ 移動鋳型の中央部より下方の外面
１ｃ 移動鋳型の中央部より上方の外面
２ 主要ヒーター
２ａ ヒーターボックス
２ｂ 発熱体
３ 冷却管
４ 補助ヒーター
５ スペーサー
６ａ〜６ｃ鋳型上部の熱電対挿入孔
７ａ〜７ｂ鋳型中部の熱電対挿入孔
１１ 固定鋳型
１１ａ湯口
１１ｂ格子基板形状の空洞部（キャビティ）
１２ 移動鋳型
１２ａ湯口
１２ｂ格子基板形状の空洞部（キャビティ）
１３ 固定鋳型と移動鋳型を位置合わせするためのガイド棒
１４ 固定鋳型と移動鋳型を位置合わせするためのガイド孔
DESCRIPTION OF SYMBOLS 1 Moving mold 1a Center part 1b of a moving mold Outer surface 1c below the center part of a moving mold Outer surface 2 above the center part of a moving mold Main heater 2a Heater box 2b Heating element 3 Cooling pipe 4 Auxiliary heater 5 Spacers 6a-6c mold Upper thermocouple insertion holes 7a to 7b Thermocouple insertion holes 11 in the middle of the mold 11 Fixed mold 11a Pouring gate 11b Cavity part in the shape of a lattice substrate (cavity)
12 moving mold 12a gate 12b lattice substrate shaped cavity (cavity)
13 Guide rod for aligning fixed mold and moving mold 14 Guide hole for aligning fixed mold and moving mold
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| JPH0810898A (en) * | 1994-06-30 | 1996-01-16 | Unisia Jecs Corp | Device for heating metallic mold for casting |
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