JPH01203010A - Molding method for filter unit - Google Patents
Molding method for filter unitInfo
- Publication number
- JPH01203010A JPH01203010A JP63027323A JP2732388A JPH01203010A JP H01203010 A JPH01203010 A JP H01203010A JP 63027323 A JP63027323 A JP 63027323A JP 2732388 A JP2732388 A JP 2732388A JP H01203010 A JPH01203010 A JP H01203010A
- Authority
- JP
- Japan
- Prior art keywords
- frame
- filter medium
- cavity
- filter
- edge
- 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
- 238000000465 moulding Methods 0.000 title claims description 30
- 238000000034 method Methods 0.000 title claims description 14
- 229920005989 resin Polymers 0.000 claims abstract description 34
- 239000011347 resin Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 31
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は、濾材の周囲を合成樹脂製フレームに埋め込
んで濾材とフレームを一体成形した構造を備えたフィル
タユニットの成形方法の改良に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an improvement in a method for molding a filter unit having a structure in which the periphery of a filter medium is embedded in a synthetic resin frame and the filter medium and frame are integrally molded.
〈従来の技術〉
例えば自動車用エンジンのオイルフィルタに用いられる
フィルタユニットは、濾材の周囲をフレームに固定した
構造が一般的であり、従来はフレームとして金属板の板
金加工品が多く用いられていたが、軽量化やコストダウ
ンなどのために、濾材の周囲を合成樹脂製のフレームに
埋め込んだ構造の一体成形品が最近かなり用いられるよ
うになっている。<Conventional technology> For example, filter units used in automobile engine oil filters generally have a structure in which the periphery of the filter medium is fixed to a frame, and in the past, sheet metal products of metal plates were often used as the frame. However, in order to reduce weight and cost, integrally molded products in which the periphery of the filter medium is embedded in a synthetic resin frame have recently come into widespread use.
第７図はこのような構造の一体成形品からなるフィルタ
ユニット２０の一例を示す平面図、第８図は拡大して示
した要部の破断斜視図であり、２１はフレーム、２２は
濾材を示す。また、第９図は濾材端部とフレームとの結
合部を示す断面図であり、濾材２２の端縁は、理想的に
は第９図の（ａ）のように折れ曲がらずにフレーム２１
内に挿入され、その周囲を樹脂で囲まれた状態となるこ
とが望ましい。FIG. 7 is a plan view showing an example of the filter unit 20 made of an integrally molded product having such a structure, and FIG. 8 is an enlarged cutaway perspective view of the main parts, where 21 is a frame and 22 is a filter medium. show. Further, FIG. 9 is a cross-sectional view showing the joint between the end of the filter medium 22 and the frame. Ideally, the end edge of the filter medium 22 should not be bent as shown in FIG.
It is desirable that the resin be inserted into the body and surrounded by resin.
〈発明が解決しようとする課題〉
しかしながら１例えば第７図に示すような位置２３にゲ
ートがある場合には、成形時に樹脂材料がフレーム２１
に沿って矢印の方向に流れるため５濾材２２の端縁は樹
脂材料の流れに押されて第９図の（ｂ）のように流れの
下流側に曲がり、フレーム２１の内面に露出した折れ曲
がり部２２ａが生じやすい。このため、外観的な商品価
値が下がるだけでなく、濾材２２とフレーム２１との密
着性が低下し、この部分で亀裂が生じてリークの原因と
なる等の性能面への悪影響が出る場合もあり、この現象
は濾材２２として比較的層の弱い材料が用いられている
場合には特に生じやすいもめであった。<Problems to be Solved by the Invention> However, 1. For example, if the gate is located at position 23 as shown in FIG.
Since the flow flows in the direction of the arrow along the flow, the edge of the filter medium 22 is pushed by the flow of the resin material and bends toward the downstream side of the flow as shown in FIG. 22a is likely to occur. For this reason, not only does the external value of the product decrease, but also the adhesion between the filter medium 22 and the frame 21 decreases, which may cause cracks in this area and cause leaks, which may have an adverse effect on performance. This phenomenon is particularly likely to occur when a material with a relatively weak layer is used as the filter medium 22.
この発明はこのような問題点に着目し、濾材とフレーム
を一体成形した構造のフィルタユニットにおける濾材端
縁の密着性と外観を向上することを目的としてなされた
ものである。The present invention has focused on these problems and has been made with the object of improving the adhesion and appearance of the edges of the filter medium in a filter unit having a structure in which the filter medium and the frame are integrally molded.
〈課題を解決するための手段〉
上述の目的を達成するために、この発明のフィルタユニ
ットの成形方法では、濾材を挟んで組み合わせることに
よりフレーム形成用キャビティを構成する一組の成形金
型の一方に、上記フレーム形成用キャビティに隣接して
濾材端縁の基部を押さえる薄肉突出部と押さえリブ形成
用キャビティとをこの順に設け、他方の金型のフレーム
形成用キャビティを上記薄肉突出部と押さえリブ形成用
キャビティとの境界面に対応する位置にまで達する大き
さとしている。そしてこの金型を用いて樹脂成形を行い
、フレーム形成用キャビティに樹脂材料を注入して樹脂
材料で濾材端縁を薄肉突出部の方向に押圧しながらフレ
ームを形成するとともに、押さえリブ形成用キャビティ
にも樹脂材料を注入して押さえリブを形成する。<Means for Solving the Problems> In order to achieve the above-mentioned object, in the method for molding a filter unit of the present invention, one of a pair of molding molds that constitute a frame forming cavity by combining a filter medium on both sides. A thin protrusion for pressing the base of the edge of the filter medium and a cavity for forming a presser rib are provided in this order adjacent to the frame forming cavity, and the frame forming cavity of the other mold is placed between the thin protrusion and the presser rib. The size is such that it reaches a position corresponding to the interface with the forming cavity. Then, resin molding is performed using this mold, and a resin material is injected into the frame forming cavity, and the frame is formed by pressing the edge of the filter medium in the direction of the thin protrusion with the resin material. A resin material is also injected into the ribs to form presser ribs.
また押さえリブは、他方の金型にも薄肉突出部と押さえ
リブ形成用キャビティを設けることにより濾材の両面に
設けることもできる。この場合には、他方の金型のフレ
ーム形成用キャビティに隣接して濾材を押さえる薄肉突
出部を上記一方の金型の押さえリブ形成用キャビティに
対応する位置に設けるとともに、この薄肉突出部に隣接
して押さえリブ形成用キャビティを設ける。そしてこの
金型を用いて樹脂成形を行い、フレーム形成用キャビテ
ィと各押さえリブ形成用キャビティにそれぞれ樹脂材料
を注入してフレームと各押さえリブとを形成するのであ
る。The presser ribs can also be provided on both sides of the filter medium by providing the other mold with a thin protrusion and a cavity for forming the presser ribs. In this case, a thin protrusion that presses the filter material adjacent to the frame forming cavity of the other mold is provided at a position corresponding to the holding rib forming cavity of one of the molds, and also adjacent to this thin protrusion. Then, a cavity for forming a presser rib is provided. Then, resin molding is performed using this mold, and a resin material is injected into the frame forming cavity and each presser rib forming cavity, respectively, to form the frame and each presser rib.
〈作用〉
フレーム形成用キャビティに注入された樹脂材料で濾材
端縁を薄肉突出部の方向に押圧しながらフレームを形成
すると、濾材端縁は薄肉突出部側に押されて曲がる可能
性がある。しかしこの場合の成形品は、金型の薄肉突出
部の厚みに相当するわずかな間隙を隔てて押さえリブが
形成されているので、濾材の端縁部分は見えにくく外観
的には問題がない。そして、濾材の反対側にはこの間隙
と押さえリブとの境界面に対応する位置までフレームが
形成されて濾材がフレームと押さえリブとで両面から挟
まれた状態になっているので、良好な密着性が得られ、
しかも濾材端縁にはこれをフレームから分離させるよう
な外力が加わりにくく、仮りに濾材端縁がフレームから
離れてもリークが生ずることがないのである。<Operation> When a frame is formed while pressing the edge of the filter medium in the direction of the thin protrusion with the resin material injected into the frame forming cavity, the edge of the filter medium may be pushed toward the thin protrusion and bent. However, in the molded product in this case, the holding ribs are formed with a small gap corresponding to the thickness of the thin protrusion of the mold, so the edge portion of the filter medium is difficult to see and there is no problem in appearance. A frame is formed on the opposite side of the filter medium to a position corresponding to the interface between this gap and the presser rib, and the filter medium is sandwiched from both sides by the frame and the presser rib, ensuring good adhesion. You can get sex,
Moreover, it is difficult to apply an external force to the edge of the filter medium that would separate it from the frame, and even if the edge of the filter medium separates from the frame, no leakage will occur.
換言すれば、この発明は濾材端縁が折れ曲がる可能性の
ある側にフレームから小間隙を隔てて押さえリブを設け
、これに対応して濾材の反乱側も押さえることにより、
濾材端縁のシールを二重に行うようにしているのである
。従って、請求項２の発明のように押さえリブを濾材の
両面に設けた場合には、上述したような濾材に対する挟
持作用がいずれの方向の折れ曲がりに対しても有効に発
揮されることになり、成形時の樹脂流の方向に対する制
約がなくなるので、成形金型の設計や成形条件の管理な
どが容易となるのである。In other words, this invention provides a holding rib at a small gap from the frame on the side where the edge of the filter medium may bend, and correspondingly presses the rebellious side of the filter medium.
The edges of the filter media are sealed twice. Therefore, when the holding ribs are provided on both sides of the filter medium as in the invention of claim 2, the above-mentioned clamping effect on the filter medium is effectively exerted against bending in any direction. Since there are no restrictions on the direction of resin flow during molding, it becomes easier to design molds and manage molding conditions.
〈実施例〉 次に図示の実施例について説明する。<Example> Next, the illustrated embodiment will be described.
第１図乃至第５図は請求項１の発明の実施例であり、自
動車用エンジンのオイルフィルタに用いられるフィルタ
ユニットの例を示している。図において、１はフレーム
、２は濾紙や不滅布などのシート状のものを波形に折り
曲げた形状の濾材、３は押さえリブであり、濾材２の端
部はフレーム１の中に埋め込まれて両者は一体化されて
いる。1 to 5 show an embodiment of the invention according to claim 1, and show an example of a filter unit used in an oil filter for an automobile engine. In the figure, 1 is a frame, 2 is a filter material in the shape of a sheet-like material such as filter paper or indestructible cloth folded into a corrugated shape, and 3 is a holding rib, and the end of the filter material 2 is embedded in the frame 1 so that both are integrated.
第２図の（ａ）は濾材２の端部とフレーム１が一体化さ
れる部分の金型の形状を、（ｂ）は同じ箇所の成形後切
形状をそれぞれ示したものであり、図は波形となった濾
材２の底の部分で切った断面図となっている。また第３
図は濾材２の中間部分で濾材２を横切る方向に切った断
面図であり、（ａ）は樹脂材料注入前の状態を、（ｂ）
は成形後の形状の例をそれぞれ示している。Fig. 2(a) shows the shape of the mold at the part where the end of the filter medium 2 and the frame 1 are integrated, and Fig. 2(b) shows the cut shape of the same part after molding. This is a cross-sectional view taken at the bottom of the corrugated filter medium 2. Also the third
The figures are cross-sectional views taken in the direction across the filter medium 2 at the middle part of the filter medium 2, (a) shows the state before resin material is injected, (b)
1 and 2 respectively show examples of shapes after molding.
４ａ及び４ｂは濾材２を挟んで組み合わせられる一組の
成形金型、５はこれらの金型４ａ、４ｂにより構成され
るフレーム形成用キャビティであり、一方の成形金型４
ａには、フレーム形成用キャビティ５に隣接して濾材端
縁２ａの基部２ｂを押さえる薄肉突出部６と押さえリブ
形成用キャビティ７とをこの順に設けである。この押さ
えリブ形成用キャビティ７は、波形となった濾材２の頂
点に対応する部分に設けられている橋渡し状のランナ７
ａによりフレーム形成用キャビティ５に連通している。4a and 4b are a pair of molding molds that are combined with the filter medium 2 in between; 5 is a frame forming cavity constituted by these molds 4a and 4b; one molding mold 4;
A is provided with a thin protrusion 6 adjacent to the frame forming cavity 5 for pressing the base 2b of the filter medium edge 2a and a holding rib forming cavity 7 in this order. This holding rib forming cavity 7 is formed by a bridging runner 7 provided at a portion corresponding to the apex of the corrugated filter medium 2.
It communicates with the frame forming cavity 5 through a.
フレーム形成用キャビティ５の幅は下側が広くなってい
て、他方の金型４ｂの方では金型４ａの薄肉突出部６と
押さえリブ形成用キャビティ７との境界面に対応する佐
賀にまで達する大きさとしである。The width of the frame forming cavity 5 is wider on the lower side, and in the other mold 4b, the width reaches the saga corresponding to the interface between the thin protrusion 6 of the mold 4a and the holding rib forming cavity 7. This is Satoshi.
樹脂成形は第２図の（ａ）のように濾材２を挟んで金型
４ａ、４ｂをセットし、フレーム形成用キャビティ５に
所定の樹脂材料を注入して行う、ここで金型形状やゲー
ト位置は、樹脂材料が第３図の（ａ）の矢印のように濾
材端ｉ２ａを薄肉突出部６の方向に押圧しながらフレー
ム形成用キャビティ５に充填されて行くように適切に選
定しておくのであり、濾材２が腰の弱い材質の場合には
、第３図の（ｂ）のように濾材端縁２ａは図の上方向に
折り曲げられた状態となってフレーム１が形成される。Resin molding is performed by setting the molds 4a and 4b with the filter medium 2 in between as shown in FIG. 2(a), and injecting a prescribed resin material into the frame forming cavity 5. The position is appropriately selected so that the frame forming cavity 5 is filled with the resin material while pressing the filter media end i2a in the direction of the thin protrusion 6 as shown by the arrow in FIG. 3(a). Therefore, when the filter medium 2 is made of a weak material, the frame 1 is formed with the filter medium edge 2a bent upward in the figure as shown in FIG. 3(b).
また、押さえリブ形成用キャビティ７にもランナ７ａを
通じて樹脂材料が供給されるが、樹脂材料は第４図のよ
うに濾材２を押さえながらこれに沿って下向きに流れ、
濾材２を押さえた状態で押さえリブ３が形成される。３
ａはランナ７ａの部分に形成される樹脂部、６ａは薄肉
突出部６の部分に形成される小間隙である。第５図にこ
のような一体成形で得られたフィルタユニット８の平面
図を示す。なお９は補強リブである。Further, the resin material is also supplied to the holding rib forming cavity 7 through the runner 7a, and as shown in FIG. 4, the resin material flows downward along the filter medium 2 while holding it down.
Holding ribs 3 are formed while holding down the filter medium 2. 3
A is a resin portion formed in the runner 7a portion, and 6a is a small gap formed in the thin protrusion portion 6. FIG. 5 shows a plan view of the filter unit 8 obtained by such integral molding. Note that 9 is a reinforcing rib.
第３図の（ｂ）に示す押さえリブ３の厚みｔ、小間隙６
ａのギヤツブ幅ｇ１両者の境界面とフレーム１の下部内
壁との重なり代Ｃの具体的な数値は、それぞれ例えば１
．８ｎｏ、１．７画、±０．２ｍｎ前後に選定される。The thickness t of the holding rib 3 and the small gap 6 shown in FIG. 3(b)
The specific numerical value of the overlapping margin C between the interface between the gear tooth width g1 and the lower inner wall of the frame 1 is, for example, 1.
．． 8no, 1.7 strokes, and around ±0.2mm are selected.
従って、金型４ａ、４ｂをセットした時には、濾材２は
濾材端縁２ａを除いて上下から確実に挟まれて固定され
、成形後は濾材端縁２ａが折れ曲がった側にはフレーム
１から小間隙６ａを隔てて押さえリブ３が設けられて二
重にシールされ、これに対応して濾材２の反対側もフレ
ーム１で押さえられた状態となる。このため濾材２の端
縁部分２ａは見えにくくなり、折れ曲がりが生じても外
観的な問題が生ずることはない。Therefore, when the molds 4a and 4b are set, the filter medium 2 is firmly sandwiched and fixed from above and below except for the filter edge 2a, and after molding, there is a small gap from the frame 1 to the side where the filter edge 2a is bent. A pressing rib 3 is provided across 6a to form a double seal, and correspondingly, the opposite side of the filter medium 2 is also pressed by the frame 1. For this reason, the edge portion 2a of the filter medium 2 becomes difficult to see, and even if it is bent, no problem arises in appearance.
また良好な密着性が得られ、しかも濾材端縁２ａの部分
には樹脂材料がしみ込んでいる上にフレーム１から分離
させるような外力が加わりにくいので亀裂が生じにくく
、仮りに亀裂が生じたとしてもリークを起こす可能性は
なくなるのである。In addition, good adhesion is obtained, and since the resin material is soaked into the edge 2a of the filter medium, and external force that would separate it from the frame 1 is difficult to apply, cracks are unlikely to occur, and even if cracks do occur, This also eliminates the possibility of leaks.
上述の実施例では、樹脂材料がフレーム形成用キャビテ
ィ５に充填されて行く時に、第３図において濾材端縁２
ａを下向きに押圧する方向に流れると、濾材端縁２ａが
下向きに折れ曲がって結果的には従来品と同じことにな
ってしまう、このため、従来と同じような感覚で第７図
の位置２３にゲートを配置することはできず、金型形状
やゲート位置などの選定に注意を要することになり、設
計や工程管理がかなり面倒になる。In the embodiment described above, when the resin material is filled into the frame forming cavity 5, the edge 2 of the filter medium in FIG.
If the flow flows in the direction of pressing a downwardly, the edge 2a of the filter medium will bend downwards, resulting in the same result as the conventional product.For this reason, the filter medium edge 2a will be bent downward, resulting in the same result as the conventional product. It is not possible to place a gate in the mold, and care must be taken in selecting the mold shape and gate position, making design and process management considerably more troublesome.
請求項２の発明はこの問題を解決するものであり、第６
図にその実施例を示す、第６図は第３図と同様に濾材２
の中間部分で濾材２を横切る方向に切った断面図であり
、（、）は樹脂材料注入前の状態を、（ｂ）及び（Ｃ）
は成形後の形状の例をそれぞれ示している。The invention of claim 2 solves this problem, and the invention of claim 6
An example of this is shown in the figure.
2 is a sectional view taken in a direction transverse to the filter medium 2 at the middle part, (,) shows the state before resin material injection, (b) and (C)
1 and 2 respectively show examples of shapes after molding.
すなわちこの実施例では、一方の金型４ａは薄肉突出部
６と押さえリブ形成用キャビティ７とを備えた前述の実
施例と同じものを使用し、他方の金型１４ｂは、金型４
ｂと同様にフレーム形成用キャビティ５を金型４ａの薄
肉突出部６と押さえリブ形成用キャビティ７との境界面
に対応する位置にまで達する大きさとし、更に、このフ
レーム形成用キャビティ５に隣接して濾材２を押さえる
薄肉突出部１６を金型４ａの押さえリブ形成用キャビテ
ィ７に対応する位置に設けるとともに、この薄肉突出部
１６に隣接して押さえリブ形成用キャビティ１７を設け
である。なお押さえリブ形成用キャビティ１７は、波形
となった濾材２の底に対応する部分に設けられている橋
渡し状のランナ（図示せず）により金型４ａの場合と同
様にフレーム形成用キャビティ５に連通している。That is, in this embodiment, one of the molds 4a is the same as that of the previous embodiment, which includes a thin protrusion 6 and a cavity 7 for forming presser ribs, and the other mold 14b is the same as the mold 4a.
Similarly to b, the frame forming cavity 5 is sized to reach a position corresponding to the interface between the thin protrusion 6 of the mold 4a and the holding rib forming cavity 7, and furthermore, the frame forming cavity 5 is made to have a size that corresponds to the boundary surface between the thin protrusion 6 of the mold 4a and the holding rib forming cavity 7, and further, A thin protrusion 16 for holding down the filter medium 2 is provided at a position corresponding to the holding rib forming cavity 7 of the mold 4a, and a holding rib forming cavity 17 is provided adjacent to this thin protruding part 16. Note that the holding rib forming cavity 17 is connected to the frame forming cavity 5 in the same way as in the case of the mold 4a by a bridging runner (not shown) provided at a portion corresponding to the bottom of the corrugated filter medium 2. It's communicating.
樹脂成形工程において、フレーム形成用キャビティ５と
押さえリブ形成用キャビティ７及び１７にそれぞれ樹脂
材料を注入して、フレーム１と各押さえリブ３及び１３
とを形成すると、濾材２が腰の弱い材質の場合には、第
６図の（ｂ）あるいは（ｃ）のように濾材端縁２ａは樹
脂の流れに応じて図の上方向あるいは下方向に折り曲げ
られた状態となってフレーム１が形成される。しかし、
濾材２の端部は両面にフレーム１から小間隙６ａあるい
は１６ａを隔てて押さえリブ３及び１３が設けられて二
重にシールされ、またこの部分には樹脂材料がしみ込み
、しかも小間隙６ａ、１６ａの位置がずれているので両
者が濾材２を介して相互に連通ずる状態とはならない。In the resin molding process, a resin material is injected into the frame forming cavity 5 and the holding rib forming cavities 7 and 17, respectively, to form the frame 1 and the holding ribs 3 and 13.
If the filter medium 2 is made of a weak material, the edge 2a of the filter medium will move upward or downward according to the flow of the resin, as shown in FIG. 6(b) or (c). The frame 1 is formed in a folded state. but,
The ends of the filter medium 2 are double sealed with holding ribs 3 and 13 provided on both sides with a small gap 6a or 16a from the frame 1, and the resin material is soaked into this part, and the small gap 6a or 16a is separated from the frame 1. Since the position of the filter 16a is shifted, the two cannot communicate with each other via the filter medium 2.
このため濾材２に対する挟持作用がいずれの方向の折れ
曲がりに対しても有効に発揮され、シールも完全となっ
て濾材端縁２ａの折れ曲がり方向に関係なくリークの可
能性のない良好な密着性が得られ、外観的な問題が生ず
ることもないのである。従って、金型形状やゲート位置
などに対する制約がなくなり、設計や工程管理が容易と
なるのである。Therefore, the clamping action on the filter medium 2 is effectively exerted even when the filter medium 2 is bent in any direction, and the seal is perfect, resulting in good adhesion without the possibility of leakage regardless of the direction in which the edge 2a of the filter medium is bent. Therefore, there are no problems with appearance. Therefore, there are no restrictions on mold shape, gate position, etc., and design and process control become easier.
なお、この実施例によって得られるフィルタユニットの
平面図は第５図と同じとなり、裏面にも押さえリブ１３
が形成されたものとなる。Note that the plan view of the filter unit obtained in this example is the same as that in FIG.
is formed.
〈発明の効果〉
上述の各実施例から明らかなように、この発明は濾材端
縁が折れ曲がる可能性のある側にフレームから小間隙を
隔てて押さえリブを設け、これに対応して濾材の反対側
も押さえることにより、濾材端縁のシールを二重に行う
ようにしたものである。<Effects of the Invention> As is clear from the above-mentioned embodiments, the present invention provides a holding rib at a small gap from the frame on the side where the edge of the filter medium may be bent, and correspondingly, a holding rib is provided on the side where the edge of the filter medium may bend. By pressing the sides as well, the edge of the filter medium is double sealed.
従って、片面にのみ押さえリブを設ける成形方法の場合
には、成形時の樹脂材料の流れを適正に選定することに
より、濾材に比較的層の弱い材料が用いられている場合
でも、外観がよく、リークの可能性のないフィルタユニ
ットが得られる。Therefore, in the case of a molding method in which pressure ribs are provided only on one side, by appropriately selecting the flow of the resin material during molding, the appearance can be improved even when a material with a relatively weak layer is used for the filter medium. , a filter unit with no possibility of leakage is obtained.
また両面に押さえリブを設ける成形方法の場合には、成
形時の樹脂材料の流れに関する制約がなくなり、外観が
よく、リークの可能性のないフィルタユニットの成形が
容易となるのである。Furthermore, in the case of a molding method in which presser ribs are provided on both sides, there are no restrictions on the flow of the resin material during molding, and it becomes easy to mold a filter unit that has a good appearance and is free from the possibility of leakage.
第１図乃至第６図はこの発明の実施例を示すものであり
、第１図は要部の破断斜視図、第２図の（ａ）は金型の
要部の形状を、（ｂ）は成形品の要部の形状をそれぞれ
示す断面図、第３図の（ａ）及び（ｂ）は同じく金型及
び成形品の要部の形状をそれぞれ示す断面図、第４図は
要部の側面図、第５図は全体の平面図、第６図の（ａ）
及び（ｂ）（ｃ）は別の実施例における金型の要部及び
成形品の要部の形状をそれぞれ示す断面図である。第７
図乃至第９図は従来例を示すものであり、第７図は全体
の平面図、第８図は要部の破断斜視図、第９図の（ａ）
及び（ｂ）は濾材端部とフレームとの結合部の断面図で
ある。
１・・・フレーム、２・・・濾材、２ａ・・・濾材の端
縁、２ｂ・・・端縁の基部、３．１３・・・押さえリブ
、４ａ。
４ｂ、１４ｂ・・・成形金型、５・・・フレーム形成用
キャビティ、６，１６・・・薄肉突出部、７，１７・・
・押さえリブ形成用キャビティ、７ａ・・・橋渡し状の
ランナ、８・・・フィルタユニット。1 to 6 show an embodiment of the present invention. FIG. 1 is a cutaway perspective view of the main part, FIG. 2 (a) shows the shape of the main part of the mold, and (b) are sectional views showing the shapes of the main parts of the molded product, FIGS. 3(a) and 3(b) are sectional views showing the shapes of the mold and the main parts of the molded product, respectively, and FIG. 4 is the sectional view of the main parts of the molded product. Side view, Figure 5 is the overall plan view, Figure 6 (a)
and (b) and (c) are cross-sectional views showing the shapes of the main parts of the mold and the main parts of the molded product, respectively, in another example. 7th
9 to 9 show a conventional example, FIG. 7 is an overall plan view, FIG. 8 is a cutaway perspective view of the main part, and FIG. 9 (a)
and (b) is a cross-sectional view of the joint between the end of the filter medium and the frame. DESCRIPTION OF SYMBOLS 1... Frame, 2... Filter medium, 2a... Edge of filter medium, 2b... Base of edge, 3.13... Holder rib, 4a. 4b, 14b... Molding die, 5... Frame forming cavity, 6, 16... Thin protrusion, 7, 17...
・Cavity for forming presser ribs, 7a...Bridging runner, 8...Filter unit.
Claims (2)
材とフレームを一体成形した構造のフィルタユニットの
成形方法であって、 濾材を挟んで組み合わせることによりフレーム形成用キ
ャビティを構成する一組の成形金型の一方に、上記フレ
ーム形成用キャビティに隣接して濾材端縁の基部を押さ
える薄肉突出部と押さえリブ形成用キャビティとをこの
順に設け、他方の金型のフレーム形成用キャビティを上
記薄肉突出部と押さえリブ形成用キャビティとの境界面
に対応する位置にまで達する大きさとし、樹脂成形工程
において、フレーム形成用キャビティに樹脂材料を注入
して樹脂材料で濾材端縁を薄肉突出部の方向に押圧しな
がらフレームを形成するとともに、押さえリブ形成用キ
ャビティにも樹脂材料を注入して押さえリブを形成する
ことを特徴とするフィルタユニットの成形方法。(1) A molding method for a filter unit having a structure in which the filter medium and the frame are integrally molded by embedding the periphery of the filter medium in a synthetic resin frame, which includes a set of moldings that constitute a frame-forming cavity by combining the filter medium with the filter medium in between. One of the molds is provided with a thin protrusion for pressing the base of the edge of the filter media and a cavity for forming a presser rib in this order adjacent to the frame forming cavity, and the frame forming cavity of the other mold is provided with the thin protrusion. In the resin molding process, a resin material is injected into the frame forming cavity and the edge of the filter medium is molded in the direction of the thin protrusion with the resin material. A method for molding a filter unit, which comprises forming a frame while pressing, and also injecting a resin material into a cavity for forming a presser rib to form a presser rib.
材とフレームを一体成形した構造のフィルタユニットの
成形方法であって、 濾材を挟んで組み合わせることによりフレーム形成用キ
ャビティを構成する一組の成形金型の一方に、上記フレ
ーム形成用キャビティに隣接して濾材端縁の基部を押さ
える薄肉突出部と押さえリブ形成用キャビティとをこの
順に設け、他方の金型のフレーム形成用キャビティを上
記薄肉突出部と押さえリブ形成用キャビティとの境界面
に対応する位置にまで達する大きさとし、且つこのフレ
ーム形成用キャビティに隣接して濾材を押さえる薄肉突
出部を上記一方の金型の押さえリブ形成用キャビティに
対応する位置に設けるとともに、この薄肉突出部に隣接
して押さえリブ形成用キャビティを設け、樹脂成形工程
において、フレーム形成用キャビティと各押さえリブ形
成用キャビティにそれぞれ樹脂材料を注入してフレーム
と各押さえリブとを形成することを特徴とするフィルタ
ユニットの成形方法。(2) A molding method for a filter unit having a structure in which the periphery of the filter medium is embedded in a synthetic resin frame and the filter medium and the frame are integrally molded, which comprises a set of moldings that constitute a frame forming cavity by sandwiching the filter medium and combining them. One of the molds is provided with a thin protrusion for pressing the base of the edge of the filter media and a cavity for forming a presser rib in this order adjacent to the frame forming cavity, and the frame forming cavity of the other mold is provided with the thin protrusion. A thin protrusion that is sized to reach a position corresponding to the interface between the frame forming cavity and the holding rib forming cavity, and that presses the filter medium adjacent to this frame forming cavity, is attached to the holding rib forming cavity of one of the molds. At the same time, cavities for forming presser ribs are provided adjacent to the thin protrusions, and in the resin molding process, resin material is injected into the cavity for forming the frame and each cavity for forming the presser ribs, and the frame and each A method for molding a filter unit, the method comprising: forming a holding rib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63027323A JPH01203010A (en) | 1988-02-08 | 1988-02-08 | Molding method for filter unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63027323A JPH01203010A (en) | 1988-02-08 | 1988-02-08 | Molding method for filter unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01203010A true JPH01203010A (en) | 1989-08-15 |
Family
ID=12217866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63027323A Pending JPH01203010A (en) | 1988-02-08 | 1988-02-08 | Molding method for filter unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01203010A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417858A (en) * | 1993-01-13 | 1995-05-23 | Derrick Manufacturing Corporation | Screen assembly for vibrating screening machine |
| US5417859A (en) * | 1993-01-13 | 1995-05-23 | Derrick Manufacturing Corporation | Undulating screen for vibratory screening machine and method of fabrication thereof |
| US5423893A (en) * | 1992-06-18 | 1995-06-13 | Kotaki; Daizo | Plastic filter, its injection molding die and producing method |
| US5650181A (en) * | 1993-06-17 | 1997-07-22 | Kotaki; Daizo | Injection molding die for producing plastic filter |
| US5921399A (en) * | 1996-06-07 | 1999-07-13 | Derrick Corporation | Gumbo separator |
| US5958236A (en) * | 1993-01-13 | 1999-09-28 | Derrick Manufacturing Corporation | Undulating screen for vibratory screening machine and method of fabrication thereof |
| US6000556A (en) * | 1993-01-13 | 1999-12-14 | Derrick Manufacturing Corporation | Screen assembly for vibratory screening machine |
-
1988
- 1988-02-08 JP JP63027323A patent/JPH01203010A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5423893A (en) * | 1992-06-18 | 1995-06-13 | Kotaki; Daizo | Plastic filter, its injection molding die and producing method |
| US5783077A (en) * | 1993-01-13 | 1998-07-21 | Derrick Manufacturing Corporation | Undulating screen for vibratory screening machine |
| US5417793A (en) * | 1993-01-13 | 1995-05-23 | Derrick Manufacturing Corporation | Undulating screen for vibratory screening machine and method of fabrication thereof |
| US5417859A (en) * | 1993-01-13 | 1995-05-23 | Derrick Manufacturing Corporation | Undulating screen for vibratory screening machine and method of fabrication thereof |
| US5720881A (en) * | 1993-01-13 | 1998-02-24 | Derrick Manufacturing Corporation | Screen assembly for vibrating screening machine |
| US5417858A (en) * | 1993-01-13 | 1995-05-23 | Derrick Manufacturing Corporation | Screen assembly for vibrating screening machine |
| US5868929A (en) * | 1993-01-13 | 1999-02-09 | Derrick Manufacturing Corporation | Screen assembly for vibrating screening machine |
| US5876552A (en) * | 1993-01-13 | 1999-03-02 | Derrick Manufacturing Corporation | Method of fabricating screen for vibratory screening machine |
| US5944993A (en) * | 1993-01-13 | 1999-08-31 | Derrick Manufacturing Corporation | Screen assembly for vibrating screening machine |
| US5958236A (en) * | 1993-01-13 | 1999-09-28 | Derrick Manufacturing Corporation | Undulating screen for vibratory screening machine and method of fabrication thereof |
| US6000556A (en) * | 1993-01-13 | 1999-12-14 | Derrick Manufacturing Corporation | Screen assembly for vibratory screening machine |
| US5650181A (en) * | 1993-06-17 | 1997-07-22 | Kotaki; Daizo | Injection molding die for producing plastic filter |
| US5921399A (en) * | 1996-06-07 | 1999-07-13 | Derrick Corporation | Gumbo separator |
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