CN1074712C - 模制面钩扣 - Google Patents
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Abstract
在一制造模制面钩扣的方法中,从一注模一挤压嘴射出或挤出熔化树脂,同时,将一粗网芯片引入挤出的熔化树脂和一轮模外周表面之间,轮模具有很多构体成形腔。通过一压辊的压力下或在一注射时熔化树脂压力下将芯片压向轮模外周表面而使部分熔化树脂经过芯片的孔充入钩体成形腔,从而模制成很多钩体,同时,使芯片在片状基片中偏向钩体表面侧作整体埋置。
Description
本发明涉及用热塑性树脂模制的面钩扣,具有片状基片和很多从片状基片表面上竖起的接合体,还涉及用热塑性树脂通过挤压连续地模制面钩扣的方法。更具体地说,本发明涉及在片状基片内夹置粗网片的面钩扣及其制造方法。
在制造面钩扣方面,举例来说,美国专利5,260,015公开了一种工艺,这是通过挤压模制在表面上竖有许多接合体的片状基片,并在模制中在片状基片上附加一层芯片。按该专利公开的原理,将熔化的热塑性树脂挤入转动的筒形轮模和压辊之间的间隙,轮模中很多模盘和隔板作交替叠置,同时将芯片引入挤压的树脂和压辊之间。在引入芯片时,部分树脂通过压辊的压力进入芯片而与基片结合成一体,与此同时,部分树脂充入轮模周边上的钩体成形腔而模制成钩体。这样得出的面钩扣,其芯片与基片接合面的背面结合成一体,面钩扣随着轮模的转动沿轮模的外周运行一定角度而进行冷却,然后将模制钩体从腔内拉出,基片也连续不断地脱开轮模的外周表面。
本发明人同期申请中的美国专利申请08/359,895公开一种连续制造面钩扣的连续注射成型层,其中,将纱线埋置于片状基片中。由此同期申请中的美国专利所公开的模制方法包括:使熔化树脂从注模中以一定宽度连续地引向轮模上相隔一定间隙面向注模的周边表面,这里,轮模具有很多周边钩件成形腔以及内置的冷却器;沿轮模转动的方向经由注模熔化树脂出口连续不断地引入很多纤维纱,其中一个以上的纤维纱以一定宽度平行于轮模轴线作来回移动;使部分熔化树脂在轮模沿挤出熔化树脂的方向转动中充入钩体成形腔而使纱线埋入片状基片中,从而在片状基片的表面上模制出很多钩体;使模制的面钩扣随着轮模的转动沿轮模外周表面转动一定角度;以及在最终剥离钩体时将其连同片状基片一起取出。
用上述美国专利所公开的制造方法取得的面钩扣,从其目的中可以看出,在于克服一般遇到的困难,即:模制面钩扣的背面为一光滑平面,不对背面进行特殊的表面处理很难涂上粘结剂、胶接剂一类材料,因而须使芯片与面钩扣的背面结合成一体以便在背面涂上粘结剂,并在背面上形成很多用作阴接合体的带绒体或环体。芯片在片状基片中偏向背面一侧,使部分或大部分片状基片出现在背面上。
按上面所述美国专利所公开的制造方法,面钩扣在芯片偏向背面一侧埋置在其片状基片后沿轮模外周表面单向转动一定角度,最后在一定张力下脱开轮模外周表面。在不带芯片的面钩扣中,由于对轮模周边钩体成形腔内模制的钩体最后必须将其取下,因而在片状基片上加上一相对较大的拉力时,片状基片就会伸长,而且还存在着钩体变形的问题。
在上述美国专利所公开的面钩扣中,由于埋置于基片内的芯片偏向背面一侧而部分芯片内注有合成树脂,基片背面一侧的刚性增加,面对拉力其变形也就减少。在将轮模外周表面上模制的面钩扣最终按一般情况从周边表面上剥离时,基片上带有芯片的背面伸长较少而基片上带有钩体的正面伸长较多。因此,在模制完毕后,面钩扣在正面和背面上具有不同的长度,使面钩扣在钩体一侧向上拱弯,由于很难控制正面的伸长系数,就使钩体的密度均匀性很差。在使用中,不仅不便于使面钩扣与配接体接合,而且不能取得恒定的接合强度,从而影响产品的质量。
另一方面,在按上述美国专利模制的面钩扣中,尽管只需调节引到轮模外周表面上的纱线的张力,但在将其引到轮模外周表面上时,还需一横向移动机构使纱线来回移动,必须很准确地控制纱线的张力和横向宽度,这就使制造装置复杂化而提高生产成本。
由于以上这些问题,本发明的第一个目的是提供一种高质面钩扣,在用简单的装置不加任何结构上的改变而进行挤压或注射模制时具有很稳定的形状。
本发明的第二个目的是保证面钩扣片状基片钩体一例具有足够的韧性,从而使钩体具有高度准确的密度。
本发明上述以及其他目的从以下优选实施例中显得更加清楚。
如上述申请中的美国专利所述,在模制基片和钩体中将事先用经纬纱织成的织物埋置于基片中时,面钩扣的特性首先取决于编织物的密度。因此,必须准备各种具有不同密度的织物。因为,在某些情况下,使用人只需一种耐张拉的织物而在另一些情况下又只需一种耐撕扯的织物,并不同时要求织物具有经向上和纬向上的韧性。本发明人认为,从经济上以及从不致影响面钩扣的特性上考虑,使用织物是很不方便的。
在作进一步的考虑时,本发明人发现,只要满足一种特定的模制条件,不论是在上述美国专利中所公开的挤压模制法还是在上述美国专利中所公开的注射模制法中都可在模制面钩扣的同时,在基片中埋置一种芯片如一种编织物或针织物、非编织物或丝网。本发明人还发现,在基片中埋置芯片较纱线更为有利。
就本发明的第一方面来说,用合成树脂模制的面钩扣具有:一片状基片;许多从所述片状基片上竖起的整体模制的接合体;面钩扣通过挤压和连续注射模制而成,并且面钩扣还包括一粗网片,其大体上在整个面部在所述片状基片中偏向其一个表面作整体埋置。如粗网片具有在其表面上竖起的绒毛,部分绒毛会进入基片而显著地增加钩体的韧性,使面钩扣在用作工业材料上的面钩扣时特别有利。如对芯片着色或赋以花式,这种着色或花式在将芯片偏向于钩体表面一侧埋置于基片中时易于透过树脂显现,从而不为采用高度透明的树脂就可取得某种工艺产品。
芯片必须具有足够的孔隙以便熔化树脂从中通过。一般使50-150kg/cm2的熔化树脂压力在连续注射时作用在芯片上。使熔化树脂在此树脂压力下平稳通过的芯片孔隙尺寸最好在0.05mm以上。为取得所需网目尺寸,如芯片为编织物,可改变其编织密度和(或)编织结构,如芯片为针织物,可改变其针织密度和(或)针织结构,如芯片为丝网,可改变其网目,如芯片为非编织物,可改变其纤维密度。芯片的厚度取决于需模制面钩扣的基片厚度及其用途;但为易于模制,芯片的厚度最好为基片厚度的20-60%。因此,芯片的纱线、丝料或纤维的尺寸可按要求的厚度根据情况来选定。
如芯片由纤维构成,并在表面上具有很多单纤维绒毛,部分绒毛就会进入在基片表面上模制成的钩体中;在这情况下,部分是由于基片具有足够的韧性,部分是由于钩体为纤维所强化而具有改善的韧性,这种面钩扣特别适用于要求韧性较一般为高的工业材料。
对具有这种结构的面钩扣通过下述方法可有效地进行制造。
就本发明的第二方面来说,连续注射模制法包括:驱动轮模使其作单向旋转;从与轮模相隔一定间隙的注模熔化树脂出。向轮模外周表面连续地以一定宽度注射熔化树脂;将粗网片连续地引入轮模和注模熔化树脂出口之间的间隙而埋入从注模射出的熔化树脂中,并使部分熔化树脂通过粗网片充入接合体腔而形成模制面钩扣;通过冷却装置充分冷却轮模的外周表面以冷却模制的面钩扣;从轮模外周表面上连续地取下冷却的模制面钩扣以便在具有接合体成形腔的轮模外周表面上连续不断地制造由片状基片和从基片表面上竖起的接合体构成的模制面钩扣。冷却装置最好装在轮模内以便冷却轮模的外周表面。此外,此方法还可包括使部分轮模和随其运行的模制面钩扣在经过冷却水箱时同时得到冷却的工序。
就本发明的第三方面来说,挤压模制法包括:转动轮模和压辊,压辊和轮模彼此相隔一定间隙而作反向旋转;连续地从挤压嘴向轮模和压辊之间的间隙挤压熔化树脂;连续地将粗网片引入轮模和从挤压嘴挤出的熔化树脂之间的间隙而将粗网片埋入熔化树脂,并使部分熔化树脂通过粗网片充入接合体成形腔以形成模制面钩扣;用冷却装置充分冷却轮模外周表面以冷却模制面钩扣;并连续地将冷却的模制面钩扣从轮模外周表面上取下以模制成具有上述结构的面钩扣。冷却装置最好装在轮模向以便冷却轮模,使在轮模外周表面上的模制面钩扣通过装在轮模内的冷却装置得以冷却。此外,将冷却空气吹在轮模的外周表面上以冷却模制面钩扣。
为制造本发明面钩扣很重要的是将带有使熔化树脂通过的孔隙的芯片引入轮模和不断从注模射出的或从挤压嘴挤出的熔化树脂之间。也就是,尽管在引入芯片时熔化树脂尚未与轮模外周表面直接接触,但部分熔化树脂可在引入后通过芯片的孔隙在树脂压力下或在挤压时压辊的压力下到达轮模外周表面。此时,芯片在树脂压力下或在压辊的压力下压向轮模外周表面。因此,芯片势必偏向于轮模一侧埋在注模或压辊和轮模之间模制成的基片内。
部分熔化树脂经过芯片充入轮模的钩体成形腔而形成钩体,部分熔化树脂经过芯片充入轮模外周表面和芯片之间的间隙,与背面或无钩体一侧的熔化树脂和芯片构体上的熔化树脂融合而形成基片。对于这样模制成的基片,其厚度在连续注射模制时取决于注模和轮模之间的间隙,在挤压模制时取决于轮模和压辊之间的间隙。
在基片内偏向钩体表面侧埋置的芯片有助于将模制面钩扣剥离轮模。也就是,由于在基片内偏向钩体表面侧埋有芯片,基片的轮模一侧伸长较背面或无钩体侧为小耐拉程度也高。因此,拉力有效地作用在轮模外周表面内的模制钩体上,不难将其拉出腔体。由于基片钩体侧表面没有太多的伸长,在基片的正反两面之间无伸长上的差别,使面钩扣不致在模制后在某个方向上向上弯曲,钩体分布均匀,因此生产出接合力均匀的高质面钩扣。
现就本发明优选实施例按附图详细说明如下。
图1为本发明制造模制面钩扣装置第一实施例的局部垂直剖面图;
图2为通过第一实施例制成的面钩扣的局部放大剖面图;
图3为整个模制面钩扣的剖面图;
图4为作为一例仅在其内部的芯片的一个表面上具有绒毛的模制面钩扣的放大剖面图;
图5为本发明制造模制面钩扣装置第二实施例的局部垂直剖面图;
图1为局部垂直剖面图,示出按本发明第一实施例用连续注射模制法制造模制面钩扣的情况。在此实施例中,在片状基片上模制的接合体为钩体。
在图1中,注模1的末端上半面为弧面1a,其弧度大体上等于下述轮模2的弧度,而下半面为弧面1b,其弧度与轮模2的曲面构成一定间隙。注模1为T形模,具有位于上下弧面1a、1b中部的树脂挤出口1d,熔化树脂4从此出口在一定的熔化树脂压力下作片状挤出。在此实施例中,注模1在其中部具有单个的熔化树脂浇口1c。
轮模2具有部分地与注模1上弧面1a相邻的外周表面,而与下弧面1b相隔一定间隙,其轴线平行于注模1挤出口1d。按示例,在轮模2的外周表面上具有许多钩体成形腔5。轮模2的结构大体上与美国专利4,775,310所公开的结构相同,因而在此仅作简要说明。轮模2呈空心筒体状,具有水冷套2a,很多模盘和很多隔板沿空心筒体轴线作交替叠置。各模盘在前后侧周边上具有很多钩体成形腔5,腔体以其底部朝向模盘外周表面敞开。各隔板的前后两侧为平面。轮模2由未示出的已知同步驱动装置驱动而按箭头所示方向旋转。
将芯片S从卷筒上拉下而通过张力调节器3在与部分轮模2外周表面接触后引入注模1上弧面1a和轮模2外周表面之间。在此实施例中,在轮模2下方设有冷却水箱10,轮模下部浸在冷却水箱10内。导向辊9位于冷却水箱10的前上方,一组上下接收辊6、7位于导向辊9的前方,以略高于轮模2的转速旋转。
本发明所用的芯片S可以是粗网目纤维编织物、粗网目纤维针织物、具有一定网目的丝网、具有很大孔隙的非编织物或具有很多按一定样式布置的孔的合成树脂膜。在用纤维芯片的情况下,纤维由热塑性树脂如尼龙、聚酯和聚丙烯制成。尽管对用于面钩扣的热塑性树脂和纤维料最好采用同种材料,但也可采用不同材料。芯片的纤维、纤维纱或金属丝的尺寸取决于所要求的芯片厚度。此外,芯片厚度取决于面钩扣基片4a的厚度,一般最好为基片4a厚度的20-60%,根据所用树脂材料,熔化树脂的温度和压力、轮模的温度和转速应作相应的调定。要求的熔化树脂压力一般在50-150kg/cm2的范围内,最好为80-110kg/cm2。
为模制本发明面钩扣,将从注模1以一定熔化树脂压力连续射出的熔化树脂连续地压入注模1和旋转轮模2之间的间隙。同时,使部分熔化树脂通过上述沿轮模2外周表面引入的芯片S的孔挤向轮模2外周表面,从而使熔化树脂4在轮模2外周表面上作均匀扩展而连续地充入钩体成形腔5以形成钩体4b。这样,留在注模1射出口1d上的熔化树脂和扩展的熔化树脂4与芯片S的构体材料融合而形成具有一定厚度的基片4a。
在模制中,芯片S在熔化树脂压力下被压向轮模2的同时保持沿轮模2外周表面运行。因此,在本发明的这一制造方法中,对芯片S在将其引入时不必特意使其压在轮模2外周表面上。也就是,只需在足以消除松驰的张力下将芯片S引入上述间隙,芯片S就会自然地压向轮模2外周表面而使芯片S在基片4a中作偏向钩体面一侧或正面一侧的埋置如图2所示。因此,不必采用在本发明人同期申请中的美国专利08/359,895所用复杂的装置作准确控制和作横向宽度的控制。作为张力调节段3,只需采用足以保持芯片无松驰的简单的张力控制器如调节辊。当然,必要时可在芯片上作准确的张力调节。
在轮模2外周表面上形成面钩扣的树脂4受导向辊9的引导大体上沿轮模2外周表面之半运行。此时,熔化树脂4从轮模2内侧受到冷却并在经过冷却水箱10时受到进一步的冷却,使埋置有芯片S的基片4a和钩体逐渐硬化。在芯片S在基片4a中作偏向钩体表面一侧的埋置而在硬化中最后用接收辊617作水平接取时,基片4a的埋置芯片侧表面即使将其拉离轮模2外周表面也不会伸长,致使基片4a的正反两面无伸长上的差别,面钩扣就不会在将其从轮模2上取下时朝某一方向弯曲。因此,可在面钩扣的整个表面上取得均匀的钩体密度和均匀的接合强度,可以将单个钩体4b由于其弹性变形平稳地拉出腔体5。钩体4b在从轮模2上取下后立即恢复其原有形状而充分硬化,从而模制成具有如图3所示形状的面钩扣。
在此实施例中,为将模制树脂产品(即芯片埋置在基片中的面钩扣)剥离轮模2,采用作同步反向旋转的上下接收辊6、7。接收辊6、7的外周表面可以是平滑的,但最好具有周边凹槽以容纳钩体4b免其受损。接收辊6、7的转速略高于轮模2的转速以便平稳地从钩体成形腔5中取出钩体4b。
在这样制成的面钩扣中,由于在基片4a中偏向钩体表面一侧埋置有芯片S,就可使基片4a同时在纵向和横向具有足够的韧性而取得质量均匀的产品如上所述。在取得的面钩扣中在张力下切割时不会伸长,在缝制时缝针不会断裂。
在芯片S由纤维制成时,在其表面上竖有绒毛n,部分绒毛n进入钩体以明显地提高钩体韧性而使本发明面钩扣特别有利于在工业材料上用作面钩扣。此外,如对芯片S作着色或花色处理,在将其在基片中偏向钩体表面侧埋置时着色和花式透过树脂层易于显出,以致不必采用高度透明的树脂就能取得工艺产品。如芯片由丝网制成,在将其靠近钩体侧表面埋置于基片4a中时,可取得静电放电效应。在这种场合下,如配接体是由磁性材料制成的,磁吸性能也会增强。此外,在基片4a中埋置丝网时,可阻断电磁波,还可使面钩扣变形而保持其形状。
图5为作为本发明第2实施例的面钩扣挤压模制装置的垂直剖面图。
在第二实施例中,挤压咀11用以替代注模1,压辊13位于轮模2的下方与其相隔一定间隙。挤压嘴11的熔化树脂挤出口11a面向轮模2和压辊13之间的间隙。这三个构件在结构上大体上与美国专利5,260,015所公开的相同,在此略去其详细说明。
在此实施例中,最重要的是将芯片S引入轮模2外周表面和从挤压嘴11中挤出的熔化树脂4之间的间隙。也就是在示例中,将从卷筒8上拉下的芯片S经过张力调节段3在部分地接触轮模2外周表面后引入轮模2外周表面和从挤压嘴11的挤出口11a中挤出的熔化树脂4之间。此外,用以从内部冷却轮膜2外周表面的冷却水套2a位于轮模2内,冷却空气吹嘴14用以向经过压辊13加压表面的轮模2外周表面吹以冷却空气。用未示出的驱动装置驱动轮模2和压辊13使其作反向同步旋转如图5中箭头所示。
导向辊9位于冷却空气吹嘴14的斜上方,一组上下接收辊6、7以略高于轮模2的转速转动而位于导向辊9的前方。
在这样构成的装置上,将从挤压嘴11,挤出的熔化树脂4引入压辊13和沿轮模2外周表面引入的芯片S之间的间隙,并将其经过芯片S的孔通过压辊13的压力压向轮模2外周表面。部分挤出的熔化树脂4充入轮模2外周表面上的钩体成形腔5而形成钩体4b,同时,部分挤出的熔化树脂4在轮模2和芯片S之间散布而使芯片S钩体表面侧上的熔化树脂4和背面侧上的熔化树脂4彼此在整个面部融合而成基片4a。这样模制成的本发明面钩扣大体上沿轮模2的四分之一运行而连续地将其从轮模2外表面上取下,并经过导向辊9而最后由接收辊6、7接取。同时,模制面钩扣通过轮模2内的冷却水套2a逐渐冷却而通过来自冷却空气吹嘴14的空气作进一步的冷却而硬化。在此实施例中,对引入轮模2和压辊13之间间隙的芯片S进行预热以消除其与半熔高温基片4a的温差,使两者间的融合更可靠。
在第一和第二实施例中,单个的钩体4b在相对的两个侧面各有加强肋4c如图3所示。单个的钩体4b在同一排中朝向同一方向,在相邻一排中朝向相反方向。加强肋4c虽可略去不用,但用后可防止钩体4b侧向歪倒。在本发明中,同排中相邻钩体4b可以交替地朝向相反方向。在这种安排中,可取得接合力无方向性的面钩扣。本发明绝不应受以上实施例的限制,还可提出各种变型方案而不脱离本发明的要点。
从以上具体说明中可以看出,按本发明的方法可以在一单个的模制工序中连续地制造使芯片S在基片4a中作偏向钩体表面侧埋置的模制面钩扣而不需很多过细的模制工序,所得面钩扣在纵向和横向同样具有足够的韧性。此外,在模制面钩扣中,从轮模2外周表面上剥离面钩扣时,在基片4a正反面之间无伸长上的差别,因此,钩体4b在其整个面部具有均匀的密度,因而可取得尺寸准确、接合强度均匀的高质产品。
在芯片S作着色或花式处理时,由于芯片S在基片4a中向正面侧偏置,不必对模制树脂4采用高度透明的材料就可清楚地显出这种着色或花式。如芯片S在正面竖有绒毛n,由于绒毛n进入钩体4b并与之融合,钩体4b的韧性会明显地提高,因而使面钩扣最适用于工业材料上的钩扣。
Claims (6)
1.一种用合成树脂模制的面钩扣,具有:
一片状基片;很多从所述片状基片的一个表面上竖起的整体模制的接合体;其特征在于:所述面钩扣通过挤压或连续注射模制而成,所述面钩扣还包括一粗网片,其在所述片状基片的基本整个面部偏向所述片状基片的所述一表面作整体埋置。
2.按权利要求1所述面钩扣,其中:所述粗网片为针织片或编织片。
3.按权利要求1所述面钩扣,其中:所述粗网片为一非编织物。
4.按权利要求1所述面钩扣,其中:所述粗网片为一丝网。
5.按权利要求1所述面钩扣,其中:所述粗网片在其表面上竖有绒毛,绒毛部分地进入所述接合体。
6.按权利要求1所述面钩扣,其中:对所述粗网片作着色或(和)花式处理。
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US08/433,200 US5620769A (en) | 1995-05-02 | 1995-05-02 | Molded surface fastener and method for manufacturing the same |
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- 1996-04-04 EP EP96105474A patent/EP0740910B1/en not_active Expired - Lifetime
- 1996-04-04 ES ES96105474T patent/ES2176372T3/es not_active Expired - Lifetime
- 1996-04-25 TW TW086209638U patent/TW325656U/zh unknown
- 1996-04-26 CA CA002175180A patent/CA2175180C/en not_active Expired - Fee Related
- 1996-04-29 CN CN96105662A patent/CN1074712C/zh not_active Expired - Fee Related
- 1996-05-02 BR BR9601628A patent/BR9601628A/pt active Search and Examination
- 1996-05-02 KR KR1019960014233A patent/KR0179237B1/ko not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
JP3505030B2 (ja) | 2004-03-08 |
CA2175180A1 (en) | 1996-11-03 |
DE69622221T2 (de) | 2003-02-13 |
ES2176372T3 (es) | 2002-12-01 |
EP0740910A2 (en) | 1996-11-06 |
EP0740910A3 (en) | 1997-04-16 |
KR960040228A (ko) | 1996-12-17 |
TW325656U (en) | 1998-01-21 |
CA2175180C (en) | 1999-06-29 |
KR0179237B1 (ko) | 1999-02-01 |
EP0740910B1 (en) | 2002-07-10 |
BR9601628A (pt) | 1998-03-31 |
US5620769A (en) | 1997-04-15 |
DE69622221D1 (de) | 2002-08-14 |
JPH08299031A (ja) | 1996-11-19 |
HK1010657A1 (en) | 1999-06-25 |
CN1137973A (zh) | 1996-12-18 |
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