CN110789184B - 一种增加铝蜂窝板粘接强度的工艺 - Google Patents
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Abstract
本发明公开了一种增加铝蜂窝板粘接强度的工艺,所述铝蜂窝板包括由上往下依次叠合的上板、铝蜂窝芯和下板,所述上板和下板与铝蜂窝芯叠合的一面涂布有胶水,包括以下步骤:(1)将组坯后的铝蜂窝板的上板和下板固定;(2)移动铝蜂窝芯距离a,使胶水聚集在铝蜂窝芯的孔格外沿上。该工艺使胶水聚集在铝蜂窝芯的孔格外沿上,从而可以大大增加铝蜂窝芯的孔格与胶水的接触面积,从而增加铝蜂窝芯与上、下板之间的粘接强度,提高铝蜂窝板的粘接强度,可以在满足粘接强度要求的前提下,减少涂胶量,从而节约成本。
Description
技术领域
本发明涉及复合板技术领域,尤其涉及一种增加铝蜂窝板粘接强度的工艺。
背景技术
铝蜂窝板是指具有“铝板/铝蜂窝芯/铝板”三层结构的复合板材,铝板与铝蜂窝芯之间采用粘合剂进行粘接,这种复合板材具有强度高、质量轻、无甲醛类物质释放、经久耐用、外观优异等特点,广泛应用于大型建筑内外装潢装修、飞机或轮船的舱室隔板,现在更进一步向家具板材等领域拓展。现有的铝蜂窝板在生产过程中通常是采用胶水涂布在铝板与铝蜂窝芯接触的一面,从而将两块铝板分别叠合粘接在铝蜂窝芯的上端和下端,然而,此种方式使得铝蜂窝芯根部的孔格与铝板上的胶水接触面积比较小,两者的粘接强度不高,大量胶水残留在铝蜂窝芯的孔格内的铝板上而起不到将铝蜂窝芯和铝板连接的作用。
发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。为此,本发明提供了一种增加铝蜂窝板粘接强度的工艺,其可以大大提高铝蜂窝板的粘接强度。
根据本发明的第一方面实施例的增加铝蜂窝板粘接强度的工艺,所述铝蜂窝板包括由上往下依次叠合的上板、铝蜂窝芯和下板,所述上板和下板与铝蜂窝芯叠合的一面涂布有胶水,该工艺包括以下步骤:(1)将组坯后的铝蜂窝板的上板和下板固定;(2)移动铝蜂窝芯距离a,使胶水聚集在铝蜂窝芯的孔格外沿上。
根据本发明实施例的增加铝蜂窝板粘接强度的工艺,至少具有如下有益效果:该工艺通过移动铝蜂窝芯,使胶水聚集在铝蜂窝芯的孔格外沿上,可以大大增加铝蜂窝芯的孔格与胶水的接触面积,从而增加铝蜂窝芯与上、下板之间的粘接强度,提高铝蜂窝板的粘接强度,可以在满足粘接强度要求的前提下,减少涂胶量,从而节约成本。
根据本发明的一些实施例,所述步骤(2)中,移动铝蜂窝芯距离a后,再反向移动蜂窝芯距离b,所述距离b大于距离a,从而可以使更多的胶水聚集在铝蜂窝芯的孔格外沿上。
根据本发明的一些实施例,所述距离a为所述铝蜂窝芯的孔格边长的0.5~1.2倍,所述距离b为所述距离a的1.5~2.2倍,从而使得更多的胶水被刮到铝蜂窝芯的孔格外沿上。
本发明的附加方面和优点将在下面的描述中部分给出,部分将从下面的描述中变得明显,或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解,其中:
图1是应用本发明实施例的铝蜂窝板的连续生产工艺的生产线示意图;
图2是应用本发明实施例的铝蜂窝板的连续生产工艺的流程示意图。
具体实施方式
以下将结合实施例和附图对本发明的构思、具体结构及产生的技术效果进行清楚、完整地描述,以充分地理解本发明的目的、特征和效果。显然,所描述的实施例只是本发明的一部分实施例,而不是全部实施例,基于本发明的实施例,本领域的技术人员在不付出创造性劳动的前提下所获得的其他实施例,均属于本发明保护的范围。
参照图1和图2,应用本发明的一种铝蜂窝板的连续生产工艺,其主要包括混合、涂胶、组坯、刮胶、静压冷却和固化的步骤,其中混合步骤的工艺如下:将反应型热熔胶A组分和反应型热熔胶B组分分别进行加热熔融、计量、输送,按照设定的配比进行混合获得聚氨酯双组分反应型热熔胶,反应型热熔胶A组分和反应型热熔胶B组的配比为(20~100):(20~100),可以根据不同的需求进行具体配置。采用聚氨酯双组分反应型热熔胶作为本申请的铝蜂窝板的连续生产工艺的粘合剂,该粘合剂具有高的初粘力,又具有双组份之间的化学反应性,其热熔胶的属性使其具有较高的初粘力。可以采用本申请人的专利CN201821082715.6中的双组分供胶装置100对反应型热熔胶A组分和反应型热熔胶B组分分别进行加热熔融、计量、输送,配比和供胶流速的控制方式为伺服电机和计量泵进行控制。输送时可以通过加热保温软管进行输送,然后通过静态混合管110进行混合均匀,静态混合管110的外层可以包覆有加热保温套。静态混合管110的混合单元一般采用SK型,混合单元为12~60节。若选用的胶水使用温度≤135℃,则可以采用塑料材质的静态混合管110,若选用的胶水使用温度需要>135℃,则可以采用不锈钢材质的静态混合管110。
涂胶步骤的工艺如下:将混合后的双组分反应型热熔胶涂布至铝板200的上表面,涂胶后的一部分铝板200由下板输送通道221进行输送形成下板220,另一部分铝板200由上板输送通道211进行输送形成上板210。在一些实施例中,可以采用淋胶方式对铝板200进行涂胶,即将经静态混合管110混合均匀的聚氨酯双组份反应型热熔胶通过管道输送到淋胶头120,然后按设定的涂胶路线和涂胶量均布在铝板200上。淋胶头120外部具有加热保温套,内部为衣架型流道,在衣架型流道的出口处设置一排均布的喷胶嘴,流道出口的宽度(即淋胶的宽度)为20~60cm,喷胶嘴的间隔为0.5~1.5cm,可以根据需要设置1~3排喷胶嘴。铝板200通过输送带匀速前进,淋胶头120在铝板200上方的平行平面内做与铝板200前进方向垂直的往返运动,将粘合剂以密集细条状淋涂到铝板200上,通过PLC程序可以协调控制淋胶速度和铝板200前进的速度,可使密集细条状的胶水在铝板200上实现均匀分布。铝板前进的速度范围为1~10m/min,涂胶量在50~500g/m2范围内任意可调,涂胶量精度在±5%以内。
组坯步骤的工艺如下:将裁切好的铝蜂窝芯300的下端贴合在下板220的上端,将上板210翻转使其涂布有聚氨酯双组分反应型热熔胶的一端位于下端,将上板210的下端贴合在铝蜂窝芯300的上端,从而组成铝蜂窝板坯310。
刮胶步骤的工艺如下:将铝蜂窝板坯310的上板210和下板220固定,移动铝蜂窝芯300距离a,使聚氨酯双组分反应型热熔胶聚集在铝蜂窝芯300的孔格外沿上,然后再反向移动铝蜂窝芯300距离b,距离b大于距离a,此时另一方向上的胶水也被铝蜂窝芯300的孔格刮动而聚集在孔格外沿上,进一步提高粘接强度。在一些实施例中,可以通过吸盘或挡板将组坯完成后的上、下板210、220固定,然后通过拉钩插入露出上、下板边缘部分的铝蜂窝芯300,将铝蜂窝芯300沿一个方向拉动距离a,距离a为铝蜂窝芯300的孔格边长的0.5~1.2倍,然后再反方向拉动距离b,距离b为距离a的1.5~2.2倍,从而使上、下板210、220上的胶水被刮到铝蜂窝芯300的孔格外沿上堆积,大幅增加了铝蜂窝芯300与铝板200之间的有效粘接面积,有利于提高产品的最终粘接强度,可以在满足粘接强度要求的前提下,减少涂胶量,从而节约成本。
静压冷却步骤的工艺如下:对上板210和下板220进行静压冷却,使得胶水得以降温凝固,形成较高的初粘力,获得铝蜂窝板半成品320。在一些实施例中,可以采用静压机400对组坯完成后的铝蜂窝板坯310的上下表面同时进行冷却,使铝蜂窝板中的胶水得以降温凝固,形成较高的初粘力,确保在后续卸压后铝板200与铝蜂窝芯300之间不再发生错动和分离。铝蜂窝板坯310经过静压冷却后即为半成品320,由于聚氨酯双组份反应型热熔胶已经凝固,具有较高的初粘强度,因此此时铝蜂窝板半成品320可以进行搬运、堆叠以及进行后加工等操作,无需等待过多时间,从而可以实现连续生产,提高生产效率。为使降温速度更快,可以在静压机400的上、下压板中设置冷却管道,并采用冷水机供给20~30℃的冷却水。为避免静压机400的上压板在下压时因冲击力度过大将铝蜂窝芯300压塌的情况,静压机400的上压板采用气缸驱动,且气路采用精密调压阀来控制。对铝蜂窝板坯310的压强范围为0.5~2.0kgf/cm2,压合时间为20~200秒。
固化步骤的工艺如下:双组份反应型热熔胶进一步进行双组份之间以及与铝板200和铝蜂窝芯300之间的化学交联固化反应,强度逐步升高,获得铝蜂窝板成品330。铝蜂窝板坯310经过静压冷却后即为半成品320,由于聚氨酯双组份反应型热熔胶已经凝固,具有较高的初粘强度,因此此时铝蜂窝板半成品320可以进行搬运、堆叠以及进行后加工等操作。在此过程中,聚氨酯双组份反应型热熔胶进一步进行双组份之间、以及与铝板200和铝蜂窝芯300之间的化学交联固化反应,强度逐步升高,在20-30℃条件下通常7天后完全完成固化,然后可以经受苛刻的强度、高低温循环、耐水等测试。若需加快最终的固化速度,也可将半成品320放置到40—50℃的环境中进行12—24小时的固化。
该工艺采用聚氨酯双组份反应型热熔胶作为铝板200与铝蜂窝芯300之间的粘结剂,使得只需要较少的静压冷却时间即可使得胶水获得较高的初粘力,大大减少了等待时间,从而实现连续生产,大大提高了生产效率,而且可以减少涂胶量,降低铝蜂窝板的重量,提高比强度,降低生产成本,同时聚氨酯双组份反应型热熔胶具有良好的、稳定的粘接性能,包括优异的粘接强度,能耐受高低温循环冲击,提高了产品的质量。
在一些实施例中,上板输送通道211和下板输送通道221均设置有控温装置,控温装置用于对上板210和下板220进行加热控温以调节涂布于上板210和下板220上的双组份反应型热熔胶的粘度,从而可以使胶水处于能流动的状态,方便后续的组坯工序。
在一些实施例中,控温装置可以设置有平面加热板,平面加热板加热温度范围为60℃~180℃,控温精度为±3℃,从而可以很好的对上板210和下板220进行加热控温,保持胶水的粘度。
以上是对本发明的较佳实施例进行了具体说明,但本发明创造并不限于实施例,熟悉本领域的技术人员在不违背本发明精神的前提下还可作出种种的等同变型或替换,这些等同的变型或替换均包含在本申请权利要求所限定的范围内。
Claims (2)
1.一种增加铝蜂窝板粘接强度的工艺,所述铝蜂窝板包括由上往下依次叠合的上板、铝蜂窝芯和下板,所述上板和下板与铝蜂窝芯叠合的一面涂布有胶水,其特征在于,包括以下步骤:(1)将组坯后的铝蜂窝板的上板和下板固定;(2)移动铝蜂窝芯距离a,再反向移动蜂窝芯距离b,所述距离b大于距离a,使胶水聚集在铝蜂窝芯的孔格外沿上。
2.根据权利要求1所述的增加铝蜂窝板粘接强度的工艺,其特征在于:所述距离a为所述铝蜂窝芯的孔格边长的0.5~1.2倍,所述距离b为所述距离a的1.5~2.2倍。
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