{"id":3337,"date":"2026-09-06T16:09:15","date_gmt":"2026-09-06T08:09:15","guid":{"rendered":"http:\/\/0"},"modified":"2026-09-04T10:15:09","modified_gmt":"2026-09-04T02:15:09","slug":"lsr-injection-molding-applications-by-part-function","status":"publish","type":"post","link":"https:\/\/www.jcinjectionmolding.com\/ja\/blog\/lsr-injection-molding-applications-by-part-function\/","title":{"rendered":"LSR\u90e8\u54c1\u306f\u3044\u3064\u305d\u306e\u8907\u96d1\u3055\u306b\u5024\u3059\u308b\u306e\u304b\uff1f"},"content":{"rendered":"

The strongest LSR Injection Molding Applications<\/strong> are usually defined by a part function rather than by a broad industry label. Silicone may be chosen because a seal must recover, a membrane must flex repeatedly, a grip must feel soft, or an interface must remain stable across temperature and fluid exposure. Starting with the function makes material, geometry, tooling, and validation decisions easier to connect.<\/p>\n

For projects that require \u6db2\u72b6\u30b7\u30ea\u30b3\u30fc\u30f3\u30b4\u30e0\uff08LSR\uff09\u6210\u5f62<\/a>, use the following map to decide whether the material is solving a real engineering problem or simply adding complexity to the design.<\/p>\n

Seals and gaskets: recover after compression<\/h2>\n

\"LSR-seals-gasket-compression\"<\/p>\n

O-rings, flat gaskets, diaphragms, valve seals, and custom sealing lips rely on controlled deformation. LSR can be useful when the design needs stable flexibility, temperature resistance, or a complex integrated geometry. The important inputs are compression, squeeze, surface finish, mating alignment, fluid exposure, and the time over which the seal must perform.<\/p>\n

A seal should be reviewed in its installed condition, not only as a free part. Parting lines and gates need to stay away from the sealing land where possible. Define leak limits, compression direction, and the inspection condition so that visual flash and functional leakage are not confused.<\/p>\n

Membranes and valves: control flexure<\/h2>\n

\"LSR-membrane-valve-flexure\"<\/p>\n

Thin membranes and valve elements translate pressure or movement into controlled flexing. Their performance depends on thickness distribution, transition radii, clamping boundary, tear resistance, and the repeatability of the molded surface. A small thickness shift can change cracking pressure, stroke, or response time.<\/p>\n

    \n
  1. Identify the active flexing zone and keep it away from gate and parting-line witnesses.<\/li>\n
  2. Use generous transitions where the membrane joins a rigid frame.<\/li>\n
  3. Control cavity balance so the last-fill region does not land in the active zone.<\/li>\n
  4. Test the membrane after the intended assembly and environmental exposure.<\/li>\n<\/ol>\n

    \u89e6\u611f\u8868\u9762\u3068\u30b0\u30ea\u30c3\u30d7\uff1a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u8010\u4e45\u6027\u306e\u3042\u308b\u3082\u306e\u306b\u3059\u308b<\/h2>\n

    \"LSR-tactile-grip-overmold\"<\/p>\n

    LSR\u306f\u3001\u30cf\u30f3\u30c9\u30eb\u3001\u30dc\u30bf\u30f3\u3001\u30a6\u30a7\u30a2\u30e9\u30d6\u30eb\u90e8\u54c1\u3001\u307e\u305f\u306f\u6d88\u8cbb\u8005\u88fd\u54c1\u306b\u30bd\u30d5\u30c8\u30bf\u30c3\u30c1\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u30e6\u30fc\u30b6\u30fc\u306f\u7d50\u679c\u3092\u611f\u3058\u307e\u3059\u304c\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u8981\u4ef6\u306b\u306f\u3001\u63a5\u7740\u5f37\u5ea6\u3001\u8010\u6469\u8017\u6027\u3001\u6c57\u3084\u5316\u5b66\u7269\u8cea\u3078\u306e\u66dd\u9732\u3001\u8272\u5b89\u5b9a\u6027\u3001\u30c6\u30af\u30b9\u30c1\u30e3\u30fc\u5b9a\u7fa9\u3001\u304a\u3088\u3073\u30a8\u30c3\u30b8\u4fdd\u6301\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u57fa\u6750\u304b\u3089\u5265\u304c\u308c\u308b\u67d4\u3089\u304b\u3044\u30b9\u30ad\u30f3\u306f\u3001\u6210\u529f\u3057\u305f\u30b0\u30ea\u30c3\u30d7\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n

    \u30b7\u30ea\u30b3\u30fc\u30f3\u3092\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u307e\u305f\u306f\u91d1\u5c5e\u306b\u30aa\u30fc\u30d0\u30fc\u30e2\u30fc\u30eb\u30c9\u3059\u308b\u5834\u5408\u3001\u9069\u5207\u306a\u5834\u5408\u306f\u6a5f\u68b0\u7684\u30ad\u30fc\u307e\u305f\u306f\u691c\u8a3c\u6e08\u307f\u306e\u5316\u5b66\u7d50\u5408\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u5de5\u5177\u88fd\u4f5c\u524d\u306b\u3001\u57fa\u6750\u306e\u8868\u9762\u72b6\u614b\u3001\u4f4d\u7f6e\u6c7a\u3081\u65b9\u6cd5\u3001\u304a\u3088\u3073\u71b1\u5b89\u5b9a\u6027\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002 \u751f\u7523\u74b0\u5883<\/a> \u306f\u3001\u30a4\u30f3\u30b5\u30fc\u30c8\u306e\u6e05\u6d44\u5ea6\u3068\u914d\u7f6e\u3092\u518d\u73fe\u53ef\u80fd\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n

    \u6d41\u4f53\u7d4c\u8def\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\uff1a\u6d41\u308c\u306e\u5883\u754c\u3092\u4fdd\u8b77\u3059\u308b<\/h2>\n

    \"LSR-fluid-path-seal\"<\/p>\n

    \u30d0\u30eb\u30d6\u3001\u30dd\u30f3\u30d7\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3001\u30c1\u30e5\u30fc\u30d6\u30b3\u30cd\u30af\u30bf\u3001\u30af\u30ed\u30fc\u30b8\u30e3\u3001\u304a\u3088\u3073\u67d4\u8edf\u306a\u30c0\u30a4\u30e4\u30d5\u30e9\u30e0\u306f\u3001\u6750\u6599\u306e\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u304c\u6d41\u4f53\u5883\u754c\u306e\u7dad\u6301\u306b\u5f79\u7acb\u3064\u5834\u5408\u306b\u30b7\u30ea\u30b3\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u8a2d\u8a08\u30ec\u30d3\u30e5\u30fc\u3067\u306f\u3001\u30dc\u30a2\u5bf8\u6cd5\u3001\u30b7\u30fc\u30eb\u529b\u3001\u30c7\u30c3\u30c9\u30dc\u30ea\u30e5\u30fc\u30e0\u3001\u7c92\u5b50\u7ba1\u7406\u3001\u6ec5\u83cc\u3001\u5316\u5b66\u7684\u9069\u5408\u6027\u3001\u304a\u3088\u3073\u30b7\u30ea\u30b3\u30fc\u30f3\u306e\u30d0\u30ea\u304c\u6d41\u8def\u306b\u5165\u308b\u30ea\u30b9\u30af\u3092\u30ab\u30d0\u30fc\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n

    \u6d41\u4f53\u63a5\u89e6\u90e8\u54c1\u306b\u3064\u3044\u3066\u306f\u3001\u5185\u90e8\u8868\u9762\u306e\u53d7\u5165\u65b9\u6cd5\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u76ee\u8996\u691c\u67fb\u3067\u306f\u3001\u3059\u3079\u3066\u306e\u95a2\u9023\u3059\u308b\u6b20\u9665\u304c\u660e\u3089\u304b\u306b\u306a\u3089\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u5727\u529b\u6e1b\u8870\u3001\u6d41\u91cf\u3001\u958b\u653e\u529b\u3001\u307e\u305f\u306f\u305d\u306e\u4ed6\u306e\u6a5f\u80fd\u30c6\u30b9\u30c8\u306f\u3001\u5b9f\u969b\u306e\u4f7f\u7528\u30b1\u30fc\u30b9\u304b\u3089\u9078\u629e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6750\u6599\u6587\u66f8\u3082\u610f\u56f3\u3055\u308c\u305f\u63a5\u89e6\u3068\u4e00\u81f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6c4e\u7528\u30b0\u30ec\u30fc\u30c9\u306f\u3001\u898f\u5236\u5bfe\u8c61\u30c7\u30d0\u30a4\u30b9\u306b\u81ea\u52d5\u7684\u306b\u9069\u3057\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n

    \u4fdd\u8b77\u3001\u7d76\u7e01\u3001\u304a\u3088\u3073\u5fdc\u529b\u7de9\u548c<\/h2>\n

    \"LSR-strain-relief-overmold\"<\/p>\n

    \u30b7\u30ea\u30b3\u30fc\u30f3\u30aa\u30fc\u30d0\u30fc\u30e2\u30fc\u30eb\u30c9\u306f\u3001\u885d\u6483\u3092\u7de9\u548c\u3057\u3001\u632f\u52d5\u3092\u7d76\u7e01\u3057\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4fdd\u8b77\u3057\u3001\u307e\u305f\u306f\u30b1\u30fc\u30d6\u30eb\u3084\u30b3\u30cd\u30af\u30bf\u306e\u5468\u308a\u306b\u5fdc\u529b\u7de9\u548c\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002\u8a2d\u8a08\u306f\u3001\u66f2\u3052\u3092\u610f\u56f3\u3057\u305f\u9818\u57df\u306b\u5411\u3051\u3001\u67d4\u3089\u304b\u3044\u6750\u6599\u304c\u7d42\u308f\u308b\u92ed\u3044\u6bb5\u5dee\u3092\u907f\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30ab\u30d0\u30ec\u30c3\u30b8\u3001\u63a5\u7740\u307e\u305f\u306f\u30ed\u30c3\u30af\u3001\u5f15\u304d\u88c2\u304d\u62b5\u6297\u3001\u304a\u3088\u3073\u6700\u5c0f\u66f2\u3052\u534a\u5f84\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n\n\n\n
    \u4f7f\u7528\u30b1\u30fc\u30b9<\/th>\n\u4e3b\u8981\u306a\u8a2d\u8a08\u51fa\u529b<\/th>\n\u6709\u7528\u306a\u30c6\u30b9\u30c8<\/th>\n<\/tr>\n
    \u5fdc\u529b\u7de9\u548c<\/td>\n\u5236\u5fa1\u3055\u308c\u305f\u66f2\u3052\u9077\u79fb<\/td>\nRepeated bend and pull<\/td>\n<\/tr>\n
    Vibration isolation<\/td>\nStiffness and mounting retention<\/td>\nDynamic vibration test<\/td>\n<\/tr>\n
    Connector protection<\/td>\nCoverage and environmental seal<\/td>\nIngress and thermal cycling<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Optical and medical components need tighter evidence<\/h2>\n

    \"LSR-optical-medical-samples\"<\/p>\n

    Optical silicone components can require clarity, controlled surface quality, and low visual distortion. Medical components can require documented material identity, controlled processing, biological evaluation, sterilization compatibility, and traceability. These applications should not be selected from a generic list of benefits; they need a defined evidence plan.<\/p>\n

    Use the quality-control information<\/a> to frame inspection gates, then write the project-specific criteria into the drawing and validation plan. If the component is implant-related or fluid-contact, the device owner\u2019s regulatory team must define the applicable requirements.<\/p>\n

    A simple decision test before choosing LSR<\/h2>\n

    \"LSR-application-decision-review\"<\/p>\n

      \n
    • Does the part need silicone\u2019s flexibility, recovery, temperature range, or surface feel?<\/li>\n
    • Can the geometry be molded and released without placing a defect on a critical surface?<\/li>\n
    • Is the substrate, fluid, sterilization, or environment compatible with the selected grade?<\/li>\n
    • Can the interface and process be validated with a repeatable test?<\/li>\n
    • Does the expected volume justify the tooling and process complexity?<\/li>\n<\/ul>\n

      If the answers are clear, LSR may simplify the assembly or improve the part\u2019s life. If the only reason is that silicone is familiar, compare it with thermoplastic elastomers, compression-molded silicone, or another material before freezing the design.<\/p>","protected":false},"excerpt":{"rendered":"

      The strongest LSR Injection Molding Applications are usually defined by a part function rather than by a broad industry label. Silicone may be chosen because a seal must recover, a membrane must flex repeatedly, a grip must feel soft, or an interface must remain stable across temperature and fluid exposure. Starting with the function makes material, geometry, tooling, and validation decisions easier to connect. For projects that require Liquid Silicone Rubber (LSR) Molding, use the following map to decide whether the material is solving a real engineering problem or simply adding complexity to the design. Seals and gaskets: recover after compression O-rings, flat gaskets, diaphragms, valve seals, and custom sealing […]<\/p>\n","protected":false},"author":1,"featured_media":3375,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3337","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.jcinjectionmolding.com\/ja\/wp-json\/wp\/v2\/posts\/3337","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jcinjectionmolding.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jcinjectionmolding.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/ja\/wp-json\/wp\/v2\/comments?post=3337"}],"version-history":[{"count":0,"href":"https:\/\/www.jcinjectionmolding.com\/ja\/wp-json\/wp\/v2\/posts\/3337\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/ja\/wp-json\/wp\/v2\/media\/3375"}],"wp:attachment":[{"href":"https:\/\/www.jcinjectionmolding.com\/ja\/wp-json\/wp\/v2\/media?parent=3337"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/ja\/wp-json\/wp\/v2\/categories?post=3337"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/ja\/wp-json\/wp\/v2\/tags?post=3337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}