CN101274162A - 过滤器及其制造方法 - Google Patents

过滤器及其制造方法 Download PDF

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Publication number
CN101274162A
CN101274162A CNA2007103004714A CN200710300471A CN101274162A CN 101274162 A CN101274162 A CN 101274162A CN A2007103004714 A CNA2007103004714 A CN A2007103004714A CN 200710300471 A CN200710300471 A CN 200710300471A CN 101274162 A CN101274162 A CN 101274162A
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CN
China
Prior art keywords
mould component
filter
filtering material
protuberance
recess
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Granted
Application number
CNA2007103004714A
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English (en)
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CN101274162B (zh
Inventor
后藤达也
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Toyota Boshoku Corp
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Toyota Boshoku Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12445—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue having the tongue on the side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/012—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12463—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being tapered
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
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    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12463—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being tapered
    • B29C66/12464—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being tapered being V-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12469—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being asymmetric
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/541—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles a substantially flat extra element being placed between and clamped by the joined hollow-preforms
    • B29C66/5412—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles a substantially flat extra element being placed between and clamped by the joined hollow-preforms said substantially flat extra element being flexible, e.g. a membrane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322—Providing cavities in the joined article to collect the burr
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7377—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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Abstract

本过滤器包括互相对接而形成过滤室的第一壳构件(上侧壳构件)和第二壳构件(下侧壳构件)、和端部夹持在所述第一壳构件和所述第二壳构件之间的过滤材料；所述第一壳构件和所述第二壳构件分别具有弯曲所述过滤材料的端部进行夹持的夹持部、和设在离开该夹持部的位置上且利用激光焊接的焊接部；所述夹持部具有向对接方向P推压所述过滤材料的内侧端部的纵推压面、和向与该对接方向交叉的方向推压所述过滤材料的外侧端部的横推压面。

Description

过滤器及其制造方法
技术领域
本发明涉及过滤器及其制造方法，更详细地涉及可以抑制使用过滤器时过滤材料脱落的便宜且构成简单的过滤器及其制造方法。
背景技术
以往，作为自动变速机用的滤油器，把过滤材料的端部夹持在互相对接形成过滤室的第一壳构件及第二壳构件之间的产品被大家所了解(例如参照专利文献1)。
在上述专利文献1中公开了使设在下部罩构件16中的销钉56贯通过滤媒体20的边缘部，同时，通过振动处理使设在下部罩构件16的销钉56外侧的肋60熔化，使上部罩构件14和下部罩构件16一体化。但是，该专利文献1由于采用振动焊接，故在各壳构件成型之后立刻实施焊接是困难的，生产效率低，进而，存在对罩构件的形状等有制约、设计自由度低的问题。
因此，作为解决与上述的振动焊接等有关的问题的技术，提出了用激光焊接使第一壳构件及第二壳构件接合的过滤器的方案(例如参照专利文献2)。
在上述专利文献2中公开了通过来自照射方向X的激光照射焊接上侧壳结构部件7及下侧壳结构部件9，通过来自照射方向Y的激光照射焊接下侧壳结构部件9及过滤器元件5而成的过滤器。由此，在壳构件中牢固地焊接过滤器元件，在使用过滤器时可以抑制过滤器元件脱落。
在此，相对由聚酰胺等组成的壳构件的材料的熔化温度，由丙烯等组成的过滤材料(过滤器元件)的软化温度相同或较低。此时，上述专利文献2的过滤材料由于从照射方向Y照射的激光产生的热量的影响发生软化或变形，存在不能把过滤材料稳定地焊接在壳构件上的危险。其结果，在使用过滤器时过滤材料有可能从壳构件上脱落。
另外，上述专利文献2必须从不同的照射方向X、Y两次照射激光，使成本及周期时间增加。
专利文献1：日本特开平11-156118号公报
专利文献2：日本特开2006-231875号公报
发明内容
以上所述，本发明是鉴于上述现状提出的，目的在于提供一种可以抑制使用过滤器时过滤材料的脱落、便宜且构成简单的过滤器及其制造方法。
1.一种过滤器，其特征在于，具备：互相对接而形成过滤室的第一壳构件及第二壳构件、和端部被夹持在所述第一壳构件及所述第二壳构件之间的过滤材料；
所述第一壳构件和所述第二壳构件分别具有使所述过滤材料的端部弯曲并进行夹持的夹持部、和设在离开该夹持部的位置上且利用激光焊接的焊接部；
所述夹持部具有向所述第一壳构件及所述第二壳构件的对接方向推压所述过滤材料的内侧端部的纵推压面、和向与该对接方向交叉的方向推压所述过滤材料的外侧端部的横推压面。
2.如上述1.所述的过滤器，在所述第一壳构件及所述第二壳构件中的一个壳构件的周缘侧设有在所述对接方向上延伸的凸部，在另一个壳构件的周缘侧设有在该对接方向上延伸且与该凸部嵌合的凹部，所述夹持部设在该凸部及该凹部的嵌合部位的过滤室侧，所述焊接部设在该凸部及该凹部的嵌合部位的过滤室相反侧。
3.如上述2.所述的过滤器，所述凸部及所述凹部各自具有互相抵接的锥状的抵接面。
4.如上述3.所述的过滤器，在所述过滤材料的表面上设有格子状网，在所述纵推压面上设有进入该格子状网的网眼中的突起部。
5.一种过滤器的制造方法，是制造上述1.中所述的过滤器的方法，其特征在于，包括：
使所述第一壳构件及所述第二壳构件互相对接，由所述夹持部使所述过滤材料的端部弯曲并进行夹持的工序；以及
从该夹持状态起，经由所述第一壳构件及所述第二壳构件中的一个壳构件朝向另一个壳构件照射激光，形成所述焊接部，将所述第一壳构件及所述第二壳构件接合的工序；
在所述的夹持的工序中，利用所述纵推压面在所述对接方向上推压所述过滤材料的内侧端部，而且，利用所述横推压面在与所述对接方向交叉的方向上推压所述过滤材料的外侧端部。
6.如上述5.所述的过滤器的制造方法，在所述第一壳构件及所述第二壳构件中的一个壳构件的周缘侧设置在所述对接方向上延伸的凸部，在另一个壳构件的周缘侧设置在该对接方向上延伸且与该凸部嵌合的凹部，所述夹持部设在该凸部及该凹部的嵌合部位的过滤室侧，所述焊接部设在该凸部及该凹部的嵌合部位的过滤室相反侧。
7.如上述6.所述的过滤器的制造方法，所述凸部及所述凹部各自具有互相抵接的锥状的抵接面。
8.如上述7.所述的过滤器的制造方法，其特征在于，在所述过滤材料的表面上设置格子状网，在所述纵推压面上设置进入该格子状网的网眼中的突起部。
发明的效果
根据本发明的过滤器，由于夹持过滤材料的端部的夹持部和用激光焊接的焊接部设在分开的位置上，所以，由激光产生的熔化热量很难传递给过滤材料，对过滤材料的形状、材质等没有影响。另外，由于过滤材料的端部以被夹持部弯曲的状态被夹持，同时，过滤材料的内侧端部由纵推压面向对接方向推压且过滤材料的外侧端部由横推压面向与对接方向交叉的方向推压，故可以在两个壳构件之间牢固地支承过滤材料，可以抑制过滤器使用时的过滤材料的脱落。另外，通过一次激光照射就可以使第一及第二壳构件接合，可以提供便宜且构成简单的过滤器。
另外，在一个壳构件的周缘侧设有凸部，在另一个壳构件的周缘侧设有凹部，所述夹持部设在该凸部及该凹部的嵌合部位的过滤室侧，所述焊接部设在该凸部及该凹部的嵌合部位的过滤室相反侧，此时，通过凸部和凹部的嵌合可以提高用激光焊接时的机械接合力，抑制第一及第二壳构件的翘曲，更切实地使两个壳构件接合。另外，可以将夹持部和焊接部设在充分离开的位置上，可以更切实地抑制由激光产生的熔化热量传递给过滤材料。
另外，所述凸部及所述凹部各自具有互相抵接的锥状的抵接面时，在凸部及凹部的嵌合部位可以减少因焊接部的翘曲产生的间隙，使焊接强度稳定。
根据本发明的过滤器，可以得到这样的过滤器，即，第一及第二壳构件互相对接，过滤材料的端部以弯曲的状态由夹持部夹持，其后，形成经由一个壳构件向另一个壳构件照射激光的焊接部，第一及第二壳构件接合在一起。在这样得到的过滤器中，由于夹持过滤材料的端部的夹持部和用激光焊接的焊接部设在分开的位置上，故由激光产生的熔化热量很难传递给过滤材料，对过滤材料的形状、材质等没有影响。另外，由于过滤材料的端部以弯曲的状态用夹持部夹持，同时，过滤材料的内侧端部由纵推压面向对接方向推压且过滤材料的外侧端部由横推压面向与对接方向交叉的方向推压，故可以在两个壳构件之间牢固地支承过滤材料，可以抑制过滤器使用时的过滤材料的脱落。另外，通过一次激光照射就可以使第一及第二壳构件接合，可以提供便宜且构成简单的过滤器。
附图说明
图1是本实施例的过滤器的纵剖面图。
图2是图1主要部分的放大图。
图3是上述过滤器的主要部分的分解立体图。
图4是用于说明上述过滤器的制造方法的剖面图。
图5是用于说明上述过滤器的制造方法的剖面图。
图6是另一方式的过滤器的主要部分的纵剖面图。
图7是又一方式的过滤器的主要部分的纵剖面图。
图8是再一方式的过滤器的主要部分的纵剖面图。
附图标记说明
1…过滤器，2…过滤室，3…上侧壳构件，4…下侧壳构件，5…过滤材料，12…端部，12a…内侧端部，12b…外侧端部，13…凸部，14…凹部，15、16…夹持部，15a、16a…纵推压面，15b、16b…横推压面，20、21…抵接面；22、23…焊接部；L…激光；P…对接方向。
具体实施方式
1.过滤器
本实施方式1.的过滤器包括以下所述的第一壳构件、第二壳构件及过滤材料。
上述的“第一壳构件”及“第二壳构件”只要互相对接形成过滤室，就不特别顾及其形状、大小、材质等。这些第一壳构件及第二壳构件中，一般在一个壳构件中形成过滤前的流体的流入口，在另一个壳构件中形成过滤后的流体的流出口。另外，一般一个壳构件具有激光透过性，另一个壳构件具有激光吸收性。
作为上述第一壳构件及第二壳构件的材料，可以举出诸如聚苯乙烯(PS)、低密度聚乙烯(LDPE)、聚碳酸酯(PC)等的非晶性树脂、聚丁烯对酞酸盐(PP)、聚苯乙烯对酞酸盐(PBT)、聚乙烯对酞酸盐(PET)、聚酰胺(PA)、聚缩醛(POM)等的结晶性树脂等。
上述的“过滤材料”只要其端部夹持在上述第一及第二壳构件之间，就不特别顾及其形状、大小、材质等。该过滤材料把过滤室划分成混浊侧和清洁侧，把流入混浊侧的流体(例如油等)过滤，流向清洁侧。
作为上述过滤材料的形状可以举出诸如折痕状、单张的片状、多张重叠的片状及波状等。另外，作为上述过滤材料的材质可以举出诸如无纺布、织物、纸等。另外，上述过滤材料例如可以具有激光透过性，也可以具有激光吸收性。
在本实施方式1.的过滤器中，上述第一及第二壳构件各自具有如下所述的夹持部及焊接部。
上述的“夹持部”只要使上述过滤材料的端部弯曲并进行夹持，就不特别顾及其形状、配置方式等。该夹持部具有向对接方向推压过滤材料的内侧端部的纵推压面、和向与对接方向交叉的方向推压过滤材料的外侧端部的横推压面。
上述过滤材料的内侧端部和外侧端部所成的弯曲角度a(参照图1)只要能抑制过滤材料的脱落就不特别顾及，最好为40～90度(特别是60～90度)。这是因为可以使壳构件的角落部和过滤材料的端部的挂连更加可靠，能够更牢固地固定过滤材料的缘故。
用上述纵推压面推压之前的过滤材料的内侧端部的厚度t1(参照图4)和用上述纵推压面推压之后的过滤材料的内侧端部的厚度t2(参照图2)的比(t1/t2)例如可以是2以上(最好是2.5以上)。由此，能够以适当的压缩率推压过滤材料的端部，可以更确实地抑制过滤材料的脱落。另外，用上述横推压面推压之前的过滤材料的外侧端部的厚度t1(参照图4)和用上述横推压面推压之后的过滤材料的外侧端部的厚度t3(参照图2)的比(t1/t3)例如可以是2以上(最好是2.5以上)。由此，以适当的压缩率推压过滤材料的端部可以更确实地抑制过滤材料的脱落。
上述的“焊接部”只要设在离开上述夹持部的位置、且处在用激光焊接的部位，就不特别顾及其形状及配置方式等。
另外，上述激光通常经由具有激光透过性的一个壳构件向具有激光吸收性的另一壳构件照射，另一壳构件的被焊接部熔化，用其熔化热量使一个壳构件的被焊接部熔化，在两个壳构件之间形成焊接部。另外，作为上述激光的种类，可以举出例如半导体、气体、固体、液体激光等。
在此，在本实施方式1.的过滤器中，例如如图2所示，可以在上述第一及第二壳构件中的一个壳构件的周缘侧设有沿对接方向P延伸的凸部13，在另一壳构件的周缘侧设有沿对接方向P延伸且与凸部13嵌合的凹部14，在该凸部13及凹部14的嵌合部位的过滤室侧设有上述夹持部15、16，在该凸部13及凹部14的嵌合部位的过滤室相反侧设有上述焊接部22、23。
上述情况作为上述凸部及凹部可以举出以下方式(1)至(4)等。
(1)在凸部13及凹部14的嵌合部位的过滤室侧形成沿对接方向P延伸的上述横推压面15b、16b，在凸部13及凹部14的嵌合部位的过滤室相反侧形成沿与对接方向P交叉的方向延伸的锥状的抵接面20、21(参照图2)。
(2)在凸部13及凹部14的嵌合部位的过滤室侧形成沿与对接方向P交叉的方向延伸的上述横推压面15b、16b，在凸部13及凹部14的嵌合部位的过滤室相反侧形成沿与对接方向P交叉的方向延伸的锥状的抵接面20、21(参照图7)。
(3)在凸部13及凹部14的嵌合部位的过滤室侧形成沿对接方向P延伸的上述横推压面15b、16b，在凸部13及凹部14的嵌合部位的过滤室相反侧形成沿对接方向延伸的抵接面20、21(参照图8)。
(4)在凸部及凹部的嵌合部位的过滤室侧形成沿与对接方向交叉的方向延伸的上述横推压面，在凸部及凹部的嵌合部位的过滤室相反侧形成沿对接方向延伸的抵接面。
其中，从可以更确实地抑制过滤材料的脱落且使激光焊接时的机械接合力进一步提高的观点出发，上述方式(1)最理想。
在此，本实施方式1.的过滤器例如如图6所示，可以在上述过滤材料5的表面上设有格子状网26，在上述纵推压面16a上设有进入该格子状网26的网眼的突起部25。由此，可以用格子状网抑制使用过滤器时过滤材料的变形，同时，可以通过突起部进入该格子状网的网眼来更加确实地抑制过滤材料的脱落。
作为上述格子状网的材质，可以举出诸如聚乙烯等合成树脂、不锈钢、铁等金属材料等。
2.过滤器的制造方法
本实施方式2.的过滤器的制造方法是上述实施方式1.中说明过的过滤器的制造方法，其特征在于，包括：使上述第一及第二壳构件互相对接、用上述夹持部弯曲并夹持过滤材料的端部的工序，和从该夹持状态起经由一个壳构件向另一壳构件照射激光、形成焊接部、接合第一及第二壳构件的工序。
【实施例】
下面，利用附图通过实施例具体说明本发明。另外，在本实施例中，作为过滤器举例表示了车辆的自动变速器用滤油器。
(1)过滤器的构成
本实施例的过滤器1如图1所示，包括：互相对接、形成过滤室2的上侧壳构件3(作为本发明的“第一壳构件”进行例示)及下侧壳构件4(作为本发明的“第二壳构件”进行例示)、和其端部12夹持在这些上侧及下侧壳构件3、4之间的过滤材料5。
在上述下侧壳构件4上形成过滤前的油的流入口7，在上述上侧壳构件3上形成用过滤材料5过滤后的油的流出口8。该上侧壳构件3由具有激光吸收性的合成树脂材料构成。而且，该下侧壳构件4由具有激光透过性的合成树脂材料构成。进而，上述过滤材料5由无纺布构成，具有折痕状部11、和连在该折痕状部11的两端侧上的端部12。利用该过滤材料5，过滤室2被划分成混浊侧2a和清洁侧2b。
在上述上侧壳构件3的周缘部，如图2及图3所示，设有沿对接方向P延伸的框状的凸部13。另外，在下侧壳构件4的周缘部，设有沿对接方向P延伸且嵌合凸部13的框状的凹部14。在这些凸部13及凹部14的嵌合部位的过滤室侧，设有弯曲并夹持过滤材料5的端部12的夹持部15、16。这些夹持部15、16具有向对接方向P推压过滤材料5的内侧端部12a的纵推压面15a、16a、和向与对接方向P正交的方向推压过滤材料5的外侧端部12b的横推压面15b、16b。而且，过滤材料5的内侧端部12a和外侧端部12b所成的弯曲角度a(参照图1)设定为90度。另外，上述过滤材料5的折痕状11的侧端部由设在上侧及下侧壳构件3、4上的梳齿状部18夹持(参照图3)。
用上述纵推压面15a、16a及横推压面15b、16b推压之前的过滤材料5的端部12的厚度t1(参照图4)设定为1mm，而用这些纵推压面15a、16a及横推压面15b、16b推压之后的过滤材料5的内侧端部12a及外侧端部12b的厚度t2、t3(参照图2)设定为0.35mm。因而，推压前后的过滤材料5的端部12的压缩比(t1/t2、t1/t3)约为2.9。
在上述凸部13及凹部14的嵌合部位的过滤室相反侧，如图2所示，形成沿与对接方向P交叉的方向延伸的锥状的抵接面20、21。在这些抵接面20、21上设有用激光焊接的焊接部22、23。
(2)过滤器的制造方法
其次，对上述过滤器1的制造方法进行说明。
首先，如图4所示，在这些凸部13及凹部14之间夹住过滤材料5的端部12，使上侧及下侧壳构件3、4互相对接。这样，如图5所示，用夹持部15、16使过滤材料5的端部12弯曲成直角并进行夹持。之后，用纵推压面15a、16a向对接方向P推压并压缩过滤材料5的内侧端部12a，同时，用横推压面15b、16b向与对接方向P正交的方向推压并压缩过滤材料5的外侧端部12b。之后，在使该对接了的上侧及下侧壳构件3、4向对接方向P加压F的状态下，经由下侧壳构件4向上侧壳构件3照射规定照射范围的激光L。这样，如图2所示，上侧壳构件3的被焊接部熔化，利用其熔化热量，下侧壳构件4的被焊接部熔化，在两壳构件3、4之间形成焊接部22、23。其结果，两壳构件3、4接合，可以得到过滤器1。
另外，在这样得到的过滤器1中，从流入口7流入到混浊侧2a的过滤室2内的油受到过滤材料5的过滤，该过滤后的清洁侧2b的过滤室2的油从流出口8向外部流出。
(3)实施例的效果
由以上叙述，根据本实施例的过滤器1，由于夹持过滤材料5的端部12的夹持部15、16和用激光L进行焊接的焊接部22、23设在分开的位置上，所以由激光产生的熔化热量很难传给过滤材料5，对过滤材料5的形状、材质等没有影响。另外，由于过滤材料5的端部12在由夹持部15、16弯曲的状态下被夹持，同时，用纵推压面15a、16a向对接方向P推压过滤材料5的内侧端部12a，且用横推压面15b、16b向与对接方向P正交的方向推压过滤材料5的外侧端部12b，故在使用过滤器时，即使在上侧壳构件3上因油的流动而朝向按压扩大壳的方向上作用有力，也可以把过滤材料5牢固地支承在上侧及下侧壳构件3、4之间，可以抑制使用过滤器时过滤材料5的脱落。另外，通过一次激光L照射就可以使上侧及下侧壳构件3、4接合，可以提供便宜且结构简单的过滤器1。
另外，本实施例在上侧壳构件3的周缘侧设有凸部13，在下侧壳构件4的周缘侧设有凹部14，在这些凸部13及凹部14的嵌合部位的过滤室侧设有夹持部15、16；在这些凸部13及该凹部14的嵌合部位的过滤室相反侧设有焊接部22、23，所以通过凸部13和凹部14的嵌合可以提高用激光L焊接时的机械接合力、抑制上侧及下侧壳构件3、4的翘曲，能够更切实地使两个壳构件3、4接合。另外，可以使夹持部15、16和焊接部22、23设在充分离开的位置上，可以更切实地抑制由激光产生的熔化热量传递给过滤材料5。
另外，在本实施例中，由于在凸部13及凹部14的嵌合部位的过滤室侧设有在对接方向P延伸的横推压面15b、16b，在凸部13及凹部14的嵌合部位的过滤室相反侧设有在与对接方向P交叉的方向延伸的锥状的抵接面20、21，故在凸部13及凹部14的嵌合部位上，可以使由于焊接部22、23的翘曲产生的间隙减小，使焊接强度稳定。
另外，在本发明中不限于上述实施例，可以根据目的、用途做成在本发明的范围内进行了各种变更的实施例。即，上述实施例表示了平面状的纵推压面15a、16a及横推压面15b、16b，但也可以如图6所示，在纵推压面15a、16a及/或横推压面15b、16b上设置推压过滤材料5的端部12的一部分的突起部25。由此，可以确实地抑制过滤材料5的脱落。另外，也可以在过滤材料5的表面上设置用于抑制在使用过滤器时过滤材料5的变形的格子状网26(在图3中用假想线表示)。此时，最好使设置在上述纵推压面15a、16a及/或横推压面15b、16b上的突起部25进入该格子状网26的网眼。由此，可以用格子状网26抑制使用过滤器时过滤材料5的变形，同时，可以通过使突起部25进入该格子状网26的网眼来确实地抑制过滤材料5的脱落。
另外，在本实施例中，在凸部13及凹部14的嵌合部位的过滤室侧设置沿对接方向P延伸的上述横推压面15b、16b，在凸部13及凹部14的嵌合部位的过滤室相反侧设置沿与对接方向P交叉的方向延伸的锥状的抵接面20、21，但不限于此，例如如图7所示，也可以在凸部13及凹部14的嵌合部位的过滤室侧设置沿与对接方向P交叉的方向延伸的横推压面15b、16b，在凸部13及凹部14的嵌合部位的过滤室相反侧设置沿与对接方向P交叉的方向延伸的锥状的抵接面20、21。而且，例如如图8所示，也可以在凸部13及凹部14的嵌合部位的过滤室侧设置沿对接方向P延伸的横推压面15b、16b，在凸部13及凹部14的嵌合部位的过滤室相反侧设置沿对接方向P延伸的抵接面20、21。
另外，在本实施例中，表示了折痕状的过滤材料5，但不限于此，例如也可以采用一张或重叠两张以上而成的片状的过滤材料。此时，可以弯曲并夹持过滤材料整周的端部。
本发明的过滤器作为过滤污染流体的过滤器使用。特别适于作为车辆的自动变速器用滤油器使用。

Claims (8)

1.一种过滤器，其特征在于，具备：互相对接而形成过滤室的第一壳构件和第二壳构件、和端部被夹持在所述第一壳构件和所述第二壳构件之间的过滤材料；
所述第一壳构件和所述第二壳构件分别具有使所述过滤材料的端部弯曲并进行夹持的夹持部、和设在离开该夹持部的位置上且利用激光焊接的焊接部；
所述夹持部具有向所述第一壳构件和所述第二壳构件的对接方向推压所述过滤材料的内侧端部的纵推压面、和向与该对接方向交叉的方向推压所述过滤材料的外侧端部的横推压面。
2.如权利要求1所述的过滤器，其特征在于，在所述第一壳构件和所述第二壳构件中的一个壳构件的周缘侧设有在所述对接方向上延伸的凸部，在另一个壳构件的周缘侧设有在该对接方向上延伸且与该凸部嵌合的凹部，所述夹持部设在该凸部及该凹部的嵌合部位的过滤室侧，所述焊接部设在该凸部及该凹部的嵌合部位的过滤室相反侧。
3.如权利要求2所述的过滤器，其特征在于，所述凸部和所述凹部各自具有互相抵接的锥状的抵接面。
4.如权利要求3所述的过滤器，其特征在于，在所述过滤材料的表面上设有格子状网，在所述纵推压面上设有进入该格子状网的网眼中的突起部。
5.一种过滤器的制造方法，是制造权利要求1中所述的过滤器的方法，其特征在于，包括：
使所述第一壳构件及所述第二壳构件互相对接，由所述夹持部使所述过滤材料的端部弯曲并进行夹持的工序；以及
从该夹持状态起，经由所述第一壳构件及所述第二壳构件中的一个壳构件朝向另一个壳构件照射激光，形成所述焊接部，将所述第一壳构件及所述第二壳构件接合的工序；
在所述的夹持的工序中，利用所述纵推压面在所述对接方向上推压所述过滤材料的内侧端部，而且，利用所述横推压面在与所述对接方向交叉的方向上推压所述过滤材料的外侧端部。
6.如权利要求5所述的过滤器的制造方法，其特征在于，在所述第一壳构件及所述第二壳构件中的一个壳构件的周缘侧设置在所述对接方向上延伸的凸部，在另一个壳构件的周缘侧设置在该对接方向上延伸且与该凸部嵌合的凹部，所述夹持部设在该凸部及该凹部的嵌合部位的过滤室侧，所述焊接部设在该凸部及该凹部的嵌合部位的过滤室相反侧。
7.如权利要求6所述的过滤器的制造方法，其特征在于，所述凸部及所述凹部各自具有互相抵接的锥状的抵接面。
8.如权利要求7所述的过滤器的制造方法，其特征在于，在所述过滤材料的表面上设置格子状网，在所述纵推压面上设置进入该格子状网的网眼中的突起部。
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