JPH01150502A - Extrusion molding device and mold used therefor - Google Patents
Extrusion molding device and mold used thereforInfo
- Publication number
- JPH01150502A JPH01150502A JP30952387A JP30952387A JPH01150502A JP H01150502 A JPH01150502 A JP H01150502A JP 30952387 A JP30952387 A JP 30952387A JP 30952387 A JP30952387 A JP 30952387A JP H01150502 A JPH01150502 A JP H01150502A
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- mold
- inlet
- taper
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001125 extrusion Methods 0.000 title claims description 24
- 239000002994 raw material Substances 0.000 claims abstract description 38
- 238000004891 communication Methods 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、押出成形装置に関し、特に・セラミックス等
の可塑性の小さい原料を成形する押出成形装置に関する
。また本発明は押出成形装置に用いられる金型に関する
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an extrusion molding apparatus, and particularly to an extrusion molding apparatus for molding raw materials with low plasticity such as ceramics. The present invention also relates to a mold used in an extrusion molding device.
一般に、真空式土練成形機などの押出成形装置は、真空
室に投入された原料を、前記真空室内に配置されたスク
リューを回転させることによって。In general, an extrusion molding device such as a vacuum clay kneading machine uses raw materials introduced into a vacuum chamber by rotating a screw placed in the vacuum chamber.
前記真空室に連設した金型の入口に導き、かつ該入口の
径より小さい径をもつ前記金型の出口から成形体として
押出すようにしたものである。前記金型の内表面は前記
入口の径と前記出口の径とで決まるチー・ぐを有してい
る。一般に、テーパは。The mold is introduced into an inlet of a mold connected to the vacuum chamber, and is extruded as a molded body from an outlet of the mold having a diameter smaller than the diameter of the inlet. The inner surface of the mold has a groove defined by the diameter of the inlet and the diameter of the outlet. In general, the taper is.
大径をａ、小径をす、大径の中心点と小径の中心点との
間の距離をｔとすると、 （ａ−ｂ ）／ｌ で定義
される。上記金型としては、数種類の異なるテーパをも
つものが用意され、この中から成形する原料に最適な金
型が選択され使用されている。If the large diameter is a, the small diameter is t, and the distance between the center point of the large diameter and the center point of the small diameter is t, it is defined as (a-b)/l. Several types of molds with different tapers are available, and the mold most suitable for the raw material to be molded is selected and used.
鼠１示臼
〔発明が解決しようとする問題点〕
しかしながら、このような押出成形装置を用いて、セラ
ミックス等の可塑性の小さい原料の成形を行なう場合、
以下のような欠点がある。すなわち、テーパの大きな金
型を使用した場合には、原料に大きな圧力が作用し、ダ
イスとの摩擦係数が大きくなるため、筒部内に材料が滞
り、原料の押出しが不可能である。他方、テーパの小さ
な金型を使用すると、十分な圧力が原料に加わらないた
め、空隙の多い（即ち、ポーラスな）成形体となってし
まい、高密度の成形体が得られない。まだ。[Problem to be solved by the invention] However, when using such an extrusion molding device to mold raw materials with low plasticity such as ceramics,
It has the following drawbacks. That is, when a mold with a large taper is used, a large pressure is applied to the raw material and the coefficient of friction with the die increases, so the material stays in the cylindrical part and it is impossible to extrude the raw material. On the other hand, if a mold with a small taper is used, sufficient pressure is not applied to the raw material, resulting in a molded product with many voids (that is, porous), and a high-density molded product cannot be obtained. still.
初めにテーパの小さい金型を用いて原料を予備成形し、
ポーラスで可塑性の大なる（即ち、流動性の良好な）予
備成形体を得、続いて、チー・やの大きい金型に取換え
てこのテーパの大きい金型を用いて前記予備成形体を再
度成形して高密度の最終成形体を得る方法もある。しか
し、この方法では。First, the raw material is preformed using a mold with a small taper.
A preformed body that is porous and has high plasticity (that is, good fluidity) is obtained, and then the mold is replaced with a mold that has a large radius and the preformed body is reprocessed using this mold that has a large taper. There is also a method of molding to obtain a final compact with high density. But with this method.
金型の交換に時間を要する上に、原料を、再度。Not only does it take time to replace the mold, but the raw materials have to be reused.
装置内を通過させるので、バインダ（これはセラミック
ス原料の投入時に原料と共に投入される。）の重合度が
減少し１品質の良い成形体は得られない。Since the binder is passed through the apparatus, the degree of polymerization of the binder (which is added together with the ceramic raw materials) decreases, making it impossible to obtain a molded body of good quality.
本発明の目的は、上記欠点を除去し２品質が良く高密度
のセラミックス成形体を得ることができるセラミックス
の押出成形装置及びそれに用いられる金型を提供するこ
とにある。An object of the present invention is to provide a ceramic extrusion molding apparatus and a mold used therein, which can eliminate the above-mentioned drawbacks and produce a high-quality, high-density ceramic molded body.
本発明によれば、真空室に投入された原料を。 According to the invention, the raw material introduced into the vacuum chamber.
真空室内に配置されたスクリューを回転させることによ
り、真空室に連設した金型の入口に導き。By rotating the screw placed in the vacuum chamber, it is guided to the entrance of the mold connected to the vacuum chamber.
且つ金型の入口の径より小さい径をもつこの金型の出口
から成形体として押出すようにしだ押出成形装置におい
て。In an extrusion molding apparatus, the molded article is extruded from the outlet of the mold, which has a diameter smaller than the diameter of the entrance of the mold.
前記金型は、入口を一端に有する第１の筒部と。The mold includes a first cylindrical portion having an inlet at one end.
この第１の筒部の他端に一端を連絡され、他端に出口を
有する第２の筒部とを有し、第１の筒部及び第２の筒部
の連絡部の径は、入口の径より小で出口の径より大であ
り、第１の筒部の内表面は。A second cylindrical part has one end connected to the other end of the first cylindrical part and has an outlet at the other end, and the diameter of the connecting part between the first cylindrical part and the second cylindrical part is the diameter of the inlet. is smaller than the diameter of the outlet and larger than the diameter of the outlet, and the inner surface of the first cylindrical portion is.
入口の径と連絡部の径とで決まる第１のテーパを有し、
第２の筒部の内表面は、連絡部の径と出口の径とで決ま
る第２のテーパを有し、この第２のテーパが第１のチー
・ぐよりも大であることを特徴とする押出成形装置が得
られる。It has a first taper determined by the diameter of the inlet and the diameter of the communication part,
The inner surface of the second cylindrical portion has a second taper determined by the diameter of the connecting portion and the diameter of the outlet, and the second taper is larger than the first taper. An extrusion molding device is obtained.
更に１本発明によれば、真空室に投入された原料を、真
空室内に配置されたスクリューを回転することによって
、真空室に連設した金型の入口に導き、且つ金型の入口
の径より小さい径をもっこの金型の出口から成形体とし
て押出すようにした押出成形装置に用いられる金型にお
いて、入口を一端に有する第１の筒部と、第１の筒部の
他端に一端を連絡され、他端に出口を有する第２の筒部
とを有し、第１の筒部及び第２の筒部の連絡部の径は、
入口の径より小で出口の径より大であり。Furthermore, according to one aspect of the present invention, the raw material introduced into the vacuum chamber is guided to the inlet of a mold connected to the vacuum chamber by rotating a screw disposed in the vacuum chamber, and the diameter of the inlet of the mold is adjusted. In a mold used in an extrusion molding device that extrudes a molded product with a smaller diameter from the outlet of the mold, a first cylindrical portion having an inlet at one end, and a first cylindrical portion at the other end of the first cylindrical portion. a second cylindrical part that is connected at one end and has an outlet at the other end, and the diameter of the connecting part between the first cylindrical part and the second cylindrical part is:
It is smaller than the inlet diameter and larger than the outlet diameter.
第１の筒部の内表面は、入口の径と第２の筒部の連絡部
の径とで決まる第１のテーパを有し、第２のテーパが、
第１のテーパより大であることを特徴とする押出成形装
置に用いられる金型が得られる。The inner surface of the first cylindrical part has a first taper determined by the diameter of the inlet and the diameter of the communication part of the second cylindrical part, and the second taper is
A mold for use in an extrusion molding apparatus is obtained, which is characterized in that the taper is larger than the first taper.
なお、上記したテーパは、一般に大径をａ、小径をす、
大径の中心点から、小径の中心点までの距離をｔとする
と（ａ −ｂ ） ／ ｌで定義されるものである。In addition, the above-mentioned taper generally has a large diameter and a small diameter.
If the distance from the center point of the large diameter to the center point of the small diameter is t, it is defined as (a-b)/l.
次に１本発明の実施例について図面を参照しながら説明
する。Next, an embodiment of the present invention will be described with reference to the drawings.
第１図は２本発明の一実施例に係る押出成形装置の一例
を示す図である。この図において、押出成形装置１は、
セラミックス原料２１０ホツパ２を有する段状のトラフ
３を有する。トラフ３の内部上段には、モータ４で駆動
されて、セラミックス原料２１を混線・搬送する搬送ス
クリュー５が配置されている。トラフ３の内部下段には
、モータ６にシャフト７を介して軸結合され、原料を押
出すスクリュー８が配置されている。トラフ３の内部上
方には、更に、スクリュー５の軸を回転可能に支持する
板体９がトラフ３の内壁に固定されている。板体９には
２図示しない多数の小さな貫通孔が形成されている。こ
の貫通孔は、それを通過したセラミックス原料の表面積
を大にし脱気効果を高める働きをする。板体９と金型１
２とトラフ３とによって形成される真空室１０は真空ボ
ンｆｌｌにより減圧され脱気される。金型１２は。FIG. 1 is a diagram showing an example of an extrusion molding apparatus according to an embodiment of the present invention. In this figure, the extrusion molding device 1 is
It has a stepped trough 3 having a ceramic raw material 210 and a hopper 2. A conveyance screw 5 is disposed in the upper part of the interior of the trough 3, which is driven by a motor 4 and mixes and conveys the ceramic raw material 21. A screw 8 that is axially coupled to a motor 6 via a shaft 7 and that pushes out the raw material is disposed in the lower part of the interior of the trough 3. Further inside and above the trough 3, a plate 9 that rotatably supports the shaft of the screw 5 is fixed to the inner wall of the trough 3. A large number of small through holes (not shown) are formed in the plate 9. As shown in FIG. This through hole serves to increase the surface area of the ceramic raw material that has passed through it, thereby increasing the deaeration effect. Plate 9 and mold 1
A vacuum chamber 10 formed by the trough 2 and the trough 3 is depressurized and degassed by a vacuum bomb full. The mold 12 is.
スクリュー８により押出されたセラミックス原料を成形
する。第２図は、第１図の押出成形装置の金型の拡大断
面図である。この図において、金型１２は、一端に入口
１５．他端に出口１６を有する。出口１６の径は入口１
５の径より小さい。この金型１２は、入口１５を一端に
有する第１の筒部１７と、該第１の筒部１７の他端に一
端を連絡され、他端に出口１６を有する第２の筒部１８
からなっている。第１及び第２の筒部１７及び１８の連
絡部１９の径は入口１５の径より小で出口１６の径より
大である。The ceramic raw material extruded by the screw 8 is molded. 2 is an enlarged sectional view of the mold of the extrusion molding apparatus of FIG. 1. FIG. In this figure, the mold 12 has an inlet 15 at one end. It has an outlet 16 at the other end. The diameter of the outlet 16 is the same as that of the inlet 1.
smaller than the diameter of 5. This mold 12 includes a first cylindrical part 17 having an inlet 15 at one end, and a second cylindrical part 18 having one end connected to the other end of the first cylindrical part 17 and having an outlet 16 at the other end.
It consists of The diameter of the connecting portion 19 of the first and second cylindrical portions 17 and 18 is smaller than the diameter of the inlet 15 and larger than the diameter of the outlet 16.
第１の筒部１７の内表面は入口１５の径ａと連絡部１９
の径すとで決まる第１のテーパを有している。この第１
のテーパは、入口１５と連絡部１９との距離を図示の如
＜ｔｘ とすると、（ａ ｂ ＞／ｌｘで表わされる
。The inner surface of the first cylindrical portion 17 is connected to the diameter a of the inlet 15 and the connecting portion 19.
It has a first taper determined by the diameter of the groove. This first
The taper is expressed as (a b >/lx, where the distance between the entrance 15 and the communication portion 19 is <tx as shown in the figure).
第２の筒部１８の内表面は、連絡部１９の径すと出口１
６の径Ｃとで決まる第２のテーパを有している。この第
２のテーパは、連絡部１９と出口１６との距離を図示の
如＜ｔ２とすると。The inner surface of the second cylindrical portion 18 is connected to the diameter of the connecting portion 19 and the outlet 1.
It has a second taper determined by the diameter C of 6. This second taper assumes that the distance between the communication portion 19 and the outlet 16 is <t2 as shown in the figure.
（ａ ｂ）／ｌｚで表わされる。第２のテーパは、第
１のチー・ぞよりも大きく形成されている。It is expressed as (a b)/lz. The second taper is formed larger than the first groove.
本実施例においては、ｔ、：ｔ２＝１：１となっており
、第１のテーパは、１ｃｒｎに対して０．１７ ｃｍ
。In this example, t:t2=1:1, and the first taper is 0.17 cm for 1 crn.
.
第２のチー／ぐは１ｃｒｎに対し０．３５ｃｒｎである
。The second Q/G is 0.35 crn for 1 crn.
本発明に係る押出成形装置及びそれに用いられる金型に
よって高密度の成形体を次のように製造した。A high-density molded body was manufactured using the extrusion molding apparatus according to the present invention and the mold used therein as follows.
単結晶製造用の原料として、 Ｍｎ−Ｚｎフェライト。Mn-Zn ferrite as a raw material for single crystal production.
３０ｍｏｌ ％ＭｎＯ＋ ２０ｍｏ１％ＺｎＯ及び５０
ｍｏｌ ％Ｆｅ ２０３をそれぞれ配合し、ゾールミ
ル４０Ｈｒ混合し２００℃で１６Ｈｒ乾燥したものを８
５０℃で６Ｈｒ仮焼した。さらに１μｍ以下に微粉砕し
て、原料。30mol%MnO+20mol%ZnO and 50
8
It was calcined at 50°C for 6 hours. The raw material is further finely ground to 1 μm or less.
バインダ、可塑剤、および水をそれぞれ重量比で１００
．３，１．５及び２６の割合で配合し加圧双腕ニーダに
より４０分混練し粘土状としたうえで押出用の原料とし
た。押出成形装置１を使用しだ押出成形は原料２１をホ
ラ・ぐ−２より投入しモータ４により１２ ｒｐｍで回
転するスクリュ５の羽根５ａで左方に搬送され２表面積
を大きくし脱気の能率を高めるだめの多数の孔を有する
スリット板９を通過し、真空ポンプ１１により減圧され
ている真空室１０で脱気される。さらにモータ６により
１２ｒｐｍで回転するスクリュ８の羽根８ａで金型１２
の中へ送り込まれる。原料は金型内第１の筒部１７で第
１段階の圧縮を受け、さらに、金型内第２の筒部１８で
第２段階の圧縮を受けて原料が金型筒部に滞ることなく
、筒部口から直径５０ｍｍ長さ１０００！＋ＩＩ＋＋密
度３ｇｒ／ｃＩｎ の高密度成形体が得られた。Binder, plasticizer, and water each in a weight ratio of 100
．． The mixture was mixed in the proportions of 3, 1.5 and 26, and kneaded for 40 minutes using a pressurized double-arm kneader to form a clay-like material, which was then used as a raw material for extrusion. In extrusion molding using the extrusion molding apparatus 1, raw material 21 is inputted from the hollow hole 2 and transported to the left by the blades 5a of the screw 5 which is rotated by the motor 4 at 12 rpm. The air passes through a slit plate 9 having a large number of holes to increase the air pressure, and is degassed in a vacuum chamber 10 whose pressure is reduced by a vacuum pump 11. Furthermore, the mold 12 is rotated by the blade 8a of the screw 8 which is rotated by the motor 6 at 12 rpm.
sent into the. The raw material undergoes a first stage of compression in the first cylindrical part 17 in the mold, and then a second stage of compression in the second cylindrical part 18 in the mold, so that the raw material does not stay in the mold cylindrical part. , diameter 50mm and length 1000mm from the tube mouth! +II++ A high-density molded body having a density of 3 gr/cIn was obtained.
成形体を空気中で１週間乾燥させ、続いて１００℃にて
２４Ｈｒ乾燥し、１３００℃で３Ｈｒ窒素雰囲気中で焼
結を行ったところ直径４０ ｔｔｒｍ 、長さ８ｏ。The molded body was dried in air for one week, then dried at 100°C for 24 hours, and sintered at 1300°C for 3 hours in a nitrogen atmosphere, resulting in a diameter of 40 ttrm and a length of 8o.
調、密度４．９ ｇｒ１ｃｍ高密度焼結体が得られた。A high-density sintered body with a density of 4.9 gr and 1 cm was obtained.
以上説明したように１本発明では、押出された原料は、
まず、金型の第１の筒部を通り、それから、該金型の第
２の筒部を通って成形体とされる。As explained above, in the present invention, the extruded raw material is
First, it passes through the first cylindrical part of the mold, and then passes through the second cylindrical part of the mold to form a molded body.
この際、第２の筒部の内表面のチー・ぐは、第１の筒部
の内表面のチー・平より大となっている。このため、原
料がセラミック等の可塑性の小さい材料であっても、こ
の原料は、まず、テーパの小さな第１の筒部で、ポーラ
スではあるが、可塑性を犬とされ、即ち、流動性が与え
られる。このような流動性のよい原料が２次のチー・平
の大きな第２の筒部に導かれ、そこで、大なるチー／や
によって十分な圧力がその原料に作用するので、原料が
金型に滞ることなく、第２の筒部から、高密度の成形体
として搬出される。もちろん、上述した従来の方法のよ
うに、原料を真空室内を、二度も９通過させる必要はな
く、従って、上述したようなバインダの重合度の減少に
よる成形体の品質の劣化は生じない。このように２本発
明では、可塑性の小さな原料であっても、高密度で品質
の良い成形体を押出成形することが可能となる。At this time, the radius of the inner surface of the second cylindrical portion is larger than the radius of the inner surface of the first cylindrical portion. Therefore, even if the raw material is a material with low plasticity such as ceramic, the raw material is porous but has a low plasticity, that is, it is given fluidity in the first cylindrical part with a small taper. It will be done. This highly fluid raw material is led to the second cylinder with a large secondary chi/flat, where sufficient pressure is applied to the raw material by the large chi/ya, so that the raw material enters the mold. The molded product is transported out of the second cylindrical portion without any stagnation as a high-density molded product. Of course, it is not necessary to pass the raw material through the vacuum chamber twice as in the conventional method described above, and therefore, the quality of the molded product does not deteriorate due to the decrease in the degree of polymerization of the binder as described above. As described above, in the two aspects of the present invention, it is possible to extrude a molded article with high density and good quality even from a raw material with low plasticity.
第１図は２本発明の実施例に係る押出成形装置の断面図
、第２図は、第１図の押出成形装置の金型の拡大断面図
である。
図中１は押出成形装置、２はホッパー、３はトラフ、４
及び６はモータ、５及び８はスクリュー。
７はシャフト、９はスリット板体、１０は真空室。
１１は真空ポンプ、１２は金型、１５は入口、１６は出
口、１７は第１の筒部、１８は第２の筒部。
１９は連絡部である。
第２図FIG. 1 is a sectional view of an extrusion molding apparatus according to a second embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a mold of the extrusion molding apparatus of FIG. In the figure, 1 is an extrusion molding device, 2 is a hopper, 3 is a trough, 4
and 6 are motors, and 5 and 8 are screws. 7 is a shaft, 9 is a slit plate, and 10 is a vacuum chamber. 11 is a vacuum pump, 12 is a mold, 15 is an inlet, 16 is an outlet, 17 is a first cylindrical portion, and 18 is a second cylindrical portion. 19 is a liaison department. Figure 2
Claims (1)
れたスクリューを回転させることによって、前記真空室
に連設した金型の入口に導き、かつ該入口の径より小さ
い径をもつ前記金型の出口から成形体として押出すよう
にした押出成形装置において、前記金型は、前記入口を
一端に有する第１の筒部と、該第１の筒部の他端に一端
を連絡され、他端に前記出口を有する第２の筒部とを有
し、前記第１及び前記第２の筒部の連絡部の径は、前記
入口の径より小で出口の径より大であり、前記第１の筒
部の内表面は前記入口の径と前記連絡部の径とで決まる
第１のテーパを有し、前記第２の筒部の内表面は前記連
絡部の径と前記出口の径とで決まる第２のテーパを有し
、前記第２のテーパが前記第１のテーパよりも大である
ことを特徴とする押出成形装置。 ２、真空室に投入された原料を、前記真空室内に配置さ
れたスクリューを回転させることによって、前記真空室
に連設した金型の入口に導き、かつ該入口の径より小さ
い径をもつ前記金型の出口から成形体として押出すよう
にした押出成形装置に用いられる金型おいて、前記入口
を一端に有する第１の筒部と、該第１の筒部の他端に一
端を連絡され、他端に前記出口を有する第２の筒部とを
有し、前記第１及び前記第２の筒部の連絡部の径は、前
記入口の径より小で出口の径より大であり、前記第１の
筒部の内表面は前記入口の径と前記連絡部の径とで決ま
る第１のテーパを有し、前記第２の筒部の内表面は前記
連絡部の径と前記出口の径とで決まる第２のテーパを有
し、前記第２のテーパが前記第１のテーパよりも大であ
ることを特徴とする押出成形装置に用いられる金型。[Claims] 1. The raw material introduced into the vacuum chamber is guided to the inlet of a mold connected to the vacuum chamber by rotating a screw placed in the vacuum chamber, and the diameter of the inlet is In an extrusion molding apparatus configured to extrude a molded product from an outlet of the mold having a smaller diameter, the mold includes a first cylindrical portion having the inlet at one end, and a second cylindrical portion other than the first cylindrical portion. a second cylindrical part having one end connected to the other end and the outlet at the other end, the diameter of the connecting part of the first and second cylindrical parts being smaller than the diameter of the inlet and the diameter of the outlet. the inner surface of the first cylindrical portion has a first taper determined by the diameter of the inlet and the diameter of the communication portion, and the inner surface of the second cylindrical portion has a first taper determined by the diameter of the inlet and the diameter of the communication portion. and a diameter of the outlet, the second taper being larger than the first taper. 2. The raw material introduced into the vacuum chamber is guided to the inlet of the mold connected to the vacuum chamber by rotating a screw placed in the vacuum chamber, and the raw material is introduced into the mold having a diameter smaller than the diameter of the inlet. A mold for use in an extrusion molding apparatus configured to extrude a molded product from an outlet of the mold, a first cylindrical part having the inlet at one end, and one end connected to the other end of the first cylindrical part. and a second cylindrical portion having the outlet at the other end, and the diameter of the connecting portion between the first and second cylindrical portions is smaller than the diameter of the inlet and larger than the diameter of the outlet. , the inner surface of the first cylindrical portion has a first taper determined by the diameter of the inlet and the diameter of the connecting portion, and the inner surface of the second cylindrical portion has a first taper determined by the diameter of the connecting portion and the outlet. A mold for use in an extrusion molding apparatus, the mold having a second taper determined by a diameter of the mold, the second taper being larger than the first taper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30952387A JPH01150502A (en) | 1987-12-09 | 1987-12-09 | Extrusion molding device and mold used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30952387A JPH01150502A (en) | 1987-12-09 | 1987-12-09 | Extrusion molding device and mold used therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01150502A true JPH01150502A (en) | 1989-06-13 |
Family
ID=17994033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30952387A Pending JPH01150502A (en) | 1987-12-09 | 1987-12-09 | Extrusion molding device and mold used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01150502A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017210502A (en) * | 2016-05-23 | 2017-11-30 | 住友ゴム工業株式会社 | Vulcanized rubber composition and method for producing the same |
-
1987
- 1987-12-09 JP JP30952387A patent/JPH01150502A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017210502A (en) * | 2016-05-23 | 2017-11-30 | 住友ゴム工業株式会社 | Vulcanized rubber composition and method for producing the same |
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