CN114523616A - 涂胶高温端子埋入注塑成型方法 - Google Patents
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Abstract
本发明公开了一种涂胶高温端子埋入注塑成型方法,包括以下步骤:获得涂胶五金端子;将所述涂胶五金端子置于烘烤箱内,调定温度为100‑120℃,调定烘烤时间为2H~4H;将烘烤好的涂胶五金端子用盒装移转,到位后将烘烤好的涂胶五金端子预插入治具中;预插入烘烤好的涂胶五金端子的治具埋入模具,注塑成型。该方法将涂胶五金端子保持热温后与塑胶材料注塑成型,更容易粘合塑胶并一体成型,同时更密合五金端子件,注塑成型件更牢固,更贴合,耗能低、品控稳定。
Description
技术领域
本发明属于塑胶加工成型技术领域,具体涉及一种涂胶高温端子埋入注塑成型方法。
背景技术
PBT主要由PBT-GF30组成。PBT的加工方式主要是射出成型。PBT产品具有很好的拉伸性能和延展性能,但是与五金端子埋入成型后受热塑胶冷端子影响,防油防尘防水功能很差,很难通过IP67测试。
射出成型是一种主要的聚合树脂埋入成型加工技术,其通过采用一台注塑出机,将几种不同特性五金材料与聚合树脂材料高温射出埋入成型。埋入注塑成型技术将五金端子或者多种金属,一个或者几个五金端子或材料埋入注塑成型机,从而得到五金塑胶连接器、油壶、油盖等产品。目前,一般采用五金端子直接插入注塑絷膜具直接与热流种PBT-GF30塑胶起注塑成型。或者采用烘热五金端子的工艺方式进行注塑成型。该工艺中,注塑入模腔PBT,塑合五金成型。当生产时,由于五金端子为冷端25℃~~30℃,当插入热模100℃~120℃时和热塑胶250℃~~300℃时,端子四周部分很难保持塑胶保持塑胶浑然一体,一定存在微细间隙或者缝隙,最终导致产品五金周围塑胶分布不均,包裹不严,使产品防油性、防尘性、防水性均不理解,更甚者漏油、漏水。导致产品在有油、有水的环境中无法使用,存在安全隐患,影响产品使用寿命。
发明内容
有鉴于此,提供一种耗能低、品控稳定的涂胶高温端子埋入注塑成型方法,旨在解决现有成型工艺中,冷五金热塑胶注塑成型后五金件周围塑胶间隙等技术问题。
一种涂胶高温端子埋入注塑成型方法,包括如下步骤:
获得涂胶五金端子;
将所述涂胶五金端子置于烘烤箱内,调定温度为100-120℃,调定烘烤时间为2H~4H;
将烘烤好的涂胶五金端子用盒装移转,到位后将烘烤好的涂胶五金端子预插入治具中;
预插入烘烤好的涂胶五金端子的治具埋入模具,注塑成型。
优选地,所述获得涂胶五金端子的步骤包括:将CH213粘合剂均匀涂抹于五金端子需要埋入注塑成型的部位,并进行单层涂抹。
优选地,在涂抹时,将五金端子需要露于模具外面的部分用遮盖件进行遮盖。
优选地,所述获得涂胶五金端子的方法是通过刷涂法、浸涂法或喷涂法涂覆粘合剂于五金端子表面预定部位。
优选地,所述获得涂胶五金端子的方法是刷涂法或浸涂法时,粘合剂和稀释剂体积比为4:1,所述获得涂胶五金端子的方法是喷涂法时,粘合剂和稀释剂体积比为1:1。
优选地,所述获得涂胶五金端子的步骤中涂胶的厚度为19~32μm。
优选地,在获得涂胶五金端子后,进一步进行干燥45-60分钟,并将五金端子上的涂胶预固化至少2小时,取出后加压硫化。
优选地,所述治具具有镶件孔,所述烘烤好的涂胶五金端子预插入治具中是指将烘烤好的涂胶五金端子预插入镶件孔中。
优选地,所述五金端子材料选自黄铜、铍铜、铁、钢、铝中的任一种,所述五金端子在涂胶前先进行预处理,所述预处理包括如下步骤:喷砂处理后,脱脂或化学表面处理以除去加工油、锈或其他氧化层,在预处理后90分钟内须完成涂胶。
优选地,所述注塑成型是指在模具中注入塑胶材料与预埋入并烘烤好的涂胶五金端子一体注塑成型,所述塑胶材料是PBT、含PBT复合材料、ABS、尼龙材料或聚苯硫醚。
上述涂胶高温端子埋入注塑成型方法至少具有以下优点:
1. 在高温下粘胶更容易粘合塑胶并一体成型,同时更密合五金端子件,注塑成型件更牢固,更贴合,耗能低、品控稳定。
2. 该方法粘胶五金端子中端子温度高,埋入模具并注塑成型时,不存在冷热膨胀影响,更加使五金端子非常容易包胶贴合。
3. 传统埋入成型工艺中,因为人工埋入手拿端子温度高无法操作,且操作过程中空气中五金端子件热量挥发导致即便使用加热端子也无法保证端子温度与模温一致性,而本发明提供的烧烤好的涂胶五金端子,能用手拿端子进行操作,且不用担心端子温度高烫手,还能够有效使产品性能达到防油防尘防水IP67标准。
3. 因五金端子未直接粘附塑胶片材表面,而是通过涂胶结合成型的塑胶材料,有效减少后续注塑成型的压力,将五金端子牢牢粘附于PBT塑胶材材,例如,成型制造的油盖、连接器在密封牢固性、附胶一致性、均匀性方面,均得到很大提高,最终提高了其使用寿命。
附图说明
图1为本发明实施例的涂胶高温端子埋入注塑成型方法流程示意图。
图2为本发明实施例的涂胶高温端子埋入注塑成型方法中涂覆粘合剂的结构示意图。
图3为本发明实施例的涂胶高温端子埋入注塑成型方法中烧烤的结构示意图。
图4为本发明实施例的涂胶高温端子埋入注塑成型方法中子预插入治具的结构示意图。
具体实施方式
下面结合附图对本发明的具体实施方式作进一步说明。在此需要说明的是,对于这些实施方式的说明用于帮助理解本发明,但并不构成对本发明的限定。此外,下面所描述的本发明各个实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互组合。
如图1-4所示,本实施例提供的一种涂胶高温端子埋入注塑成型方法,包括如下步骤:
S01,获得涂胶五金端子11;
S02,烘烤:将所述涂胶五金端子11置于烘烤箱15内,调定温度为100-120℃,调定烘烤时间为2H~4H;
S03,将烘烤好的涂胶五金端子11用盒装移转,到位后将烘烤好的涂胶五金端子11预插入治具16中;
S04,预插入烘烤好的涂胶五金端子11的治具16埋入模具,注塑成型。
在步骤S01中,优选地,所述获得涂胶五金端子11的步骤包括:将CH213粘合剂均匀涂抹于五金端子11需要埋入注塑成型的部位12,并进行单层涂抹。更优选地,在涂抹时,将五金端子11需要露于模具外面的部分13用遮盖件进行遮盖。
CH213是一种由丁酮、环氧树脂、乙酸-I-甲氧基-Z-丙基、二甲苯、乙苯组成的胶粘剂。具体地,本实施例采用洛德公司的Chemlok213胶粘剂。CH213胶粘剂的粘合强度大于聚氨酯基材的撕裂强度。
优选地,所述获得涂胶五金端子11的方法是通过刷涂法、浸涂法或喷涂法涂覆粘合剂于五金端子11表面预定部位。当采用刷涂法或浸涂法时,粘合剂和稀释剂体积比为4:1,当采用喷涂法时,粘合剂和稀释剂体积比为1:1。以刷涂法为例,如图2所示,采用刷子14将粘合剂刷涂于涂胶五金端子11的预定部位,该预定部位是指五金端子11需要埋入注塑成型的部位12。优选地,所述获得涂胶五金端子11的步骤中涂胶的厚度为19~32μm。
优选地,在获得涂胶五金端子11后,进一步进行干燥45-60分钟,并将五金端子11上的涂胶预固化至少2小时,取出后加压硫化。对大型金属件如胶辊铁芯,按尺寸大小在120℃预固化可延长至4-8小时后再立即硫化。
具体地,在上述步骤S02中,烘烤的温度为100-120℃。此步骤中根据塑胶材料成型料温/模温具体情况确定,常用PBT/PA66等高分子工程塑胶材料,可以设定100℃、110℃、120℃,烘烤时间则视单PIN五金端子大小面积来确定,一般设定2H、3H、4H。主要目的就是将五金端子烘烤温度跟模温相同,不产生严重温度落差为宜。
优选地,在上述步骤S03中,粘合剂涂覆的热温五金端子置于封密保温盒,以便于拿取,且保温性好。然后,将端子涂胶的一端插入治具镶件孔内,整列台面上。所述治具16具有镶件孔,所述烘烤好的涂胶五金端子11预插入治具16中是指将烘烤好的涂胶五金端子11预插入镶件孔中。
在上述步骤S04中过程中,通过涂胶五金端子埋入台中精机或者其他注塑机,进行埋入注塑成型。
优选地,所述五金端子11材料选自黄铜、铍铜、铁、钢、铝中的任一种,所述五金端子11在涂胶前先进行预处理,所述预处理包括如下步骤:喷砂处理后,脱脂或化学表面处理以除去加工油、锈或其他氧化层,在预处理后90分钟内须完成涂胶。
优选地,所述注塑成型是指在模具中注入塑胶材料与预埋入并烘烤好的涂胶五金端子11一体注塑成型,所述塑胶材料是PBT、含PBT复合材料、ABS、尼龙材料或聚苯硫醚。含PBT复合材料包括但不限于PBT/PA66或PBT –GF30等。
本发明先后进行过多次试验,现举一部分试验结果作为参考对发明进行进一步详细描述,下面结合具体实施例进行详细说明。
实施例1
本实施例的涂胶高温五金埋入注塑成型新方法,包括如下步骤:
S11:获得CH213粘合剂,单层涂抹黄铜 C18150-H,T=0.8、GB/T5321端子上。该过程为:将粘合剂稀释后,单层涂抹在端子上。
S12:将涂好粘合胶端子放入烤箱2H,120℃烘烤。
S13:将上述涂胶的高温端子依次插入治具镶件孔。
S14:将涂胶高温端埋入模具,注塑射出PBT –GF30成型成品,如油壶后盖产品。
此款油壶后盖产品防油防水水平均达到IP67标准。
实施例2
本实施例的涂胶高温五金埋入注塑成型新方法,包括如下步骤:
S21:获得CH213粘合剂,单层涂抹铍铜端子上。该过程为:将粘合剂稀释后,单层涂抹在端子上。
S22:将涂好粘合胶端子放入烤箱3H,110℃烘烤。
S23:将上述涂胶的高温端子依次插入治具镶件孔。
S24:将涂胶高温端子埋入模具,注塑射出PPS成型成品,如油壶后盖产品。
此款油壶后盖产品防油防水水平均达到IP67标准。
实施例3
本实施例的涂胶高温五金埋入注塑成型新方法,包括如下步骤:
S21:获得CH213粘合剂,单层涂抹C18150-H,T=0.8、GB/T5321端子上。该过程为:将粘合剂稀释后,单层涂抹在端子上。
S22:将涂好粘合胶端子放入烤箱1H,120℃烘烤。
S23:将上述涂胶的高温端子依次插入治具镶件孔。
S24:将涂胶高温端子埋入模具,注塑射出ABS成型成品,如油壶后盖产品。
此款油壶后盖产品防油防水水平均达到IP67标准。
以上结合附图对本发明的实施方式作了详细说明,但本发明不限于所描述的实施方式。对于本领域的技术人员而言,在不脱离本发明原理和精神的情况下,对这些实施方式进行多种变化、修改、替换和变型,仍落入本发明的保护范围内。
Claims (10)
1.一种涂胶高温端子埋入注塑成型方法,其包括如下步骤:
获得涂胶五金端子;
将所述涂胶五金端子置于烘烤箱内,调定温度为100-120℃,调定烘烤时间为2H~4H;
将烘烤好的涂胶五金端子用盒装移转,到位后将烘烤好的涂胶五金端子预插入治具中;
预插入烘烤好的涂胶五金端子的治具埋入模具,注塑成型。
2.如权利要求1所述的涂胶高温端子埋入注塑成型方法,其特征在于,所述获得涂胶五金端子的步骤包括:将CH213粘合剂均匀涂抹于五金端子需要埋入注塑成型的部位,并进行单层涂抹。
3.如权利要求2所述的涂胶高温端子埋入注塑成型方法,其特征在于,在涂抹时,将五金端子需要露于模具外面的部分用遮盖件进行遮盖。
4.如权利要求1所述的涂胶高温端子埋入注塑成型方法,其特征在于,所述获得涂胶五金端子的方法是通过刷涂法、浸涂法或喷涂法涂覆粘合剂于五金端子表面预定部位。
5.如权利要求4所述的涂胶高温端子埋入注塑成型方法,其特征在于,所述获得涂胶五金端子的方法是刷涂法或浸涂法时,粘合剂和稀释剂体积比为4:1,所述获得涂胶五金端子的方法是喷涂法时,粘合剂和稀释剂体积比为1:1。
6.如权利要求1所述的涂胶高温端子埋入注塑成型方法,其特征在于,所述获得涂胶五金端子的步骤中涂胶的厚度为19~32μm。
7.如权利要求1所述的涂胶高温端子埋入注塑成型方法,其特征在于,在获得涂胶五金端子后,进一步进行干燥45-60分钟,并将五金端子上的涂胶预固化至少2小时,取出后加压硫化。
8.如权利要求1所述的涂胶高温端子埋入注塑成型方法,其特征在于,所述治具具有镶件孔,所述烘烤好的涂胶五金端子预插入治具中是指将烘烤好的涂胶五金端子预插入镶件孔中。
9.如权利要求1所述的涂胶高温端子埋入注塑成型方法,其特征在于,所述五金端子材料选自黄铜、铍铜、铁、钢、铝中的任一种,所述五金端子在涂胶前先进行预处理,所述预处理包括如下步骤:喷砂处理后,脱脂或化学表面处理以除去加工油、锈或其他氧化层,在预处理后90分钟内须完成涂胶。
10.如权利要求1所述的涂胶高温端子埋入注塑成型方法,其特征在于,所述注塑成型是指在模具中注入塑胶材料与预埋入并烘烤好的涂胶五金端子一体注塑成型,所述塑胶材料是PBT、含PBT复合材料、ABS、尼龙材料或聚苯硫醚。
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