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排除油漆和丁基防水嵌縫膠配套性差導(dǎo)致膠條開(kāi)裂的可能性
- 發(fā)布時(shí)間 : 2026-3-20 17:58:56
- Views:
(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.
排除油漆和丁基防水嵌縫膠配套性差導(dǎo)致膠條開(kāi)裂的可能性
(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.
- 發(fā)布時(shí)間 : 2026-3-20 17:58:56
- Views:
現(xiàn)場(chǎng)對(duì)左前車(chē)門(mén)靠近輪罩弧度位置包邊丁基防水嵌縫膠寬膠膠條開(kāi)裂問(wèn)題發(fā)生的工序位置進(jìn)行了進(jìn)一步摸排,在膠烘干爐出口連續(xù)觀察了10臺(tái)發(fā)現(xiàn),左前車(chē)門(mén)靠近輪罩的弧度位置包邊丁基防水嵌縫膠寬膠膠條經(jīng)過(guò)膠烘干爐預(yù)烘烤后,呈現(xiàn)米白色,包邊丁基防水嵌縫膠寬膠膠條外觀平整光滑,沒(méi)有明顯開(kāi)裂的情況,手觸包邊丁基防水嵌縫膠寬膠膠條發(fā)現(xiàn)膠條表干,輕觸不會(huì)造成膠條變形,但由于未完全烘干固化,使勁按壓會(huì)變形甚至?xí)霈F(xiàn)破裂。面漆烘干爐入口前對(duì)上述經(jīng)膠烘干爐預(yù)烘干的10臺(tái)車(chē)身進(jìn)行觀察發(fā)現(xiàn),缺陷對(duì)應(yīng)位置的包邊丁基防水嵌縫膠寬膠膠條在噴涂完面漆后經(jīng)面漆閃干爐(60-80℃)后仍然沒(méi)有明顯異常。后續(xù)又在面漆烘干爐出口對(duì)這10臺(tái)車(chē)身進(jìn)行了后續(xù)跟蹤,發(fā)現(xiàn)經(jīng)面漆烘干爐烘烤后,左前車(chē)門(mén)對(duì)應(yīng)弧度位置的包邊丁基防水嵌縫膠寬膠膠條均出現(xiàn)了開(kāi)裂的情況,而且并非固定顏色,脂玉白、琉璃青、雕錫銀等顏色均出現(xiàn)包邊丁基防水嵌縫膠寬膠條開(kāi)裂異常,因此判定左前車(chē)門(mén)靠輪罩弧度位置的包邊丁基防水嵌縫膠寬膠膠條開(kāi)裂問(wèn)題產(chǎn)生于面漆烘烤冷卻的過(guò)程中,另外由于各種顏色均有異常,并且產(chǎn)生包邊丁基防水嵌縫膠寬膠膠條開(kāi)裂的位置固定,其他位置并無(wú)明顯異常,因此可以基本排除油漆和丁基防水嵌縫膠配套性差導(dǎo)致膠條開(kāi)裂的可能性。
輕客涂裝車(chē)間面漆烘干爐對(duì)于工件溫度和烘烤時(shí)I旬的相關(guān)工藝要求為130-150 ℃(20-30 min),懷疑可能是由于車(chē)身左右兩側(cè)進(jìn)行面漆烘烤時(shí)升溫速率或者烘烤溫度存在差異,甚至左側(cè)存在過(guò)烘的情況,左前車(chē)門(mén)升溫快或者烘烤溫度相對(duì)右側(cè)高導(dǎo)致的。因此,針對(duì)左右前車(chē)門(mén)外板進(jìn)行面漆爐溫測(cè)試,發(fā)現(xiàn)左右前車(chē)門(mén)外板的升溫速率及工件溫度并無(wú)顯著性差異;并且為了節(jié)能降耗,在不突破工藝范圍的前提下現(xiàn)場(chǎng)實(shí)際采用的是偏中下線的烘烤溫度和烘烤時(shí)間,并不會(huì)產(chǎn)生過(guò)烘的情況,因此排除面漆烘烤時(shí)左右兩側(cè)存在差異或者過(guò)烘的可能性,但左前車(chē)門(mén)包邊丁基防水嵌縫膠丁基防水嵌縫膠寬膠膠條開(kāi)裂問(wèn)題產(chǎn)生的工序確實(shí)出現(xiàn)在面漆烘烤冷卻的過(guò)程中。http://www.cs535.com/
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