CN111136860A - 树脂成型品和该树脂成型品的制造方法 - Google Patents

树脂成型品和该树脂成型品的制造方法 Download PDF

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Publication number
CN111136860A
CN111136860A CN201911076848.1A CN201911076848A CN111136860A CN 111136860 A CN111136860 A CN 111136860A CN 201911076848 A CN201911076848 A CN 201911076848A CN 111136860 A CN111136860 A CN 111136860A
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CN
China
Prior art keywords
layer
laminate
molded article
resin
resin molded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911076848.1A
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English (en)
Inventor
李圣勋
秋丸立也
小岛拓郎
杉野胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Skye Ltd
Honda Motor Co Ltd
Sakaiya Co Ltd
Original Assignee
Skye Ltd
Honda Motor Co Ltd
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Filing date
Publication date
Application filed by Skye Ltd, Honda Motor Co Ltd filed Critical Skye Ltd
Publication of CN111136860A publication Critical patent/CN111136860A/zh
Pending legal-status Critical Current

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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof

Abstract

本发明提供一种树脂成型品和该树脂成型品的制造方法。树脂成型品(10)具有由层叠包括芯材层(16)、缓冲层(17)、表皮层(18)的层而成的层叠体(12)。在该结构中，层叠体(12)的最下层和周缘部被树脂被覆层(14)覆盖，仅表皮层(18)的上表面露出成为外观面。此外，层叠体(12)的周缘部被埋入到树脂被覆层(14)的内部。根据本发明，能够提供一种既厚度大又柔软且轻量的作为模塑成型品的树脂成型品。

Description

树脂成型品和该树脂成型品的制造方法
技术领域
本发明涉及一种具有层叠体和树脂被覆层的树脂成型品、和该树脂成型品的制造方法，其中所述树脂被覆层覆盖所述层叠体的周缘部和底面部。
背景技术
汽车用的智能钥匙的壳体等例如由树脂成型品构成。在该情况下，为了使壳体获得高档感或者使用户的触感良好而进行了各种研究。从这一观点出发，在日本发明专利公开公报特开2014-173203号中提出一种将烟雾印刷层设置于弹性体片材而成的人造皮革片材。根据日本发明专利公开公报特开2014-173203号，该人造皮革片材能够用作模塑成型的表皮。即，考虑通过使用该人造皮革片材在基材上进行模塑成型来得到用作壳体的树脂成型品。
发明内容
模塑成型是通过向以树脂材料作为基材的工件注射熔融树脂且使该熔融树脂固化来进行的工艺。在此，为了使壳体具有一定程度的厚度，并且为了得到柔软且轻量的壳体，考虑到通过聚氨酯泡沫(urethane foam)等发泡体来构成基材。
然而，聚氨酯泡沫的耐热性并不那么高，因此，在进行注射成型时会担心聚氨酯泡沫被来自熔融树脂的热软化或熔融。
本发明的主要目的在于，提供一种既厚度大又柔软且轻量的作为模塑成型品的树脂成型品。
本发明的另一目的在于，提供一种用于得到上述树脂成型品的树脂成型品的制造方法。
为了达成所述目的，根据本发明的一实施方式，提供一种树脂成型品，其具有层叠体和树脂被覆层，其中，所述层叠体由表皮层、缓冲层、芯材层层叠而成；所述树脂被覆层具有底部和围绕部，
所述层叠体的最下层被所述底部覆盖并且所述层叠体的周缘部被所述围绕部围绕，且所述表皮层的上表面露出而成为外观面，
所述层叠体的周缘部被埋入所述围绕部的内部。
缓冲层在被施加按压力时凹陷，在去除按压力时立刻恢复到原来的形状。即，柔软且富有弹性。除此以外，为低密度。因此，能够将层叠体、进而将树脂成型品制成一定程度的大小，并且构成为柔软且轻量的制品。
并且，在该情况下，芯材层发挥减少缓冲层所受到的热的隔热体的作用。因此，能够在成型树脂被覆层的模塑成型时避免缓冲层过度软化或熔融。
优选为，芯材层的熔点比缓冲层高。这是因为据此能够使芯材层作为隔热体更有效地发挥作用。
另外优选为，层叠体从外观面侧起，按照表皮层、缓冲层、芯材层的顺序层叠而构成，芯材层为最下层。在该情况下，在模塑成型时树脂被覆层的成为底部的熔融树脂仅与芯材层接触，而不与缓冲层直接接触。这是因为由此缓冲层受到保护而不受熔融树脂的热的影响，从而能够避免缓冲层过度软化或熔融。
作为表皮层的原材料的优选例，可列举出合成皮革(合成革)、人造皮革(人造革)、天然皮革中的至少任一种材料。在该情况下，外观面的触感良好并且外表优良、美观性优异。
另一方面，作为缓冲层的原材料的优选例，可列举出聚氨酯泡沫，作为芯材层的原材料的优选例，可列举出聚碳酸酯片材(polycarbonate sheet)。
另外，根据本发明的另一实施方式，提供一种树脂成型品的制造方法，所述树脂成型品具有层叠体和树脂被覆层，其中，所述层叠体由表皮层、缓冲层、芯材层层叠而成；所述树脂被覆层具有底部和围绕部，
具有得到树脂成型品的树脂被覆层形成工序，
在该工序中，将所述层叠体收装于注射成型装置的模腔内，对熔融树脂进行注射成型，使所述熔融树脂固化，形成具有覆盖所述层叠体的最下层的底部和埋入所述层叠体的周缘部的围绕部的树脂被覆层，并且所述表皮层的上表面从所述树脂被覆层露出而成为外观面。
通过经过这样的过程，能够形成不使缓冲层过度软化或熔融的树脂被覆层。因此，能够得到具有一定程度的大小并且柔软且轻量的树脂成型品。
优选为，层叠体通过加工工序被加工为规定的形状。在该情况下，只要在被加工而成的层叠体上形成树脂被覆层(进行树脂被覆层形成工序)即可。据此，能够减少用于形成树脂被覆层的熔融树脂的量。因此，能够实现成本的低廉化。
优选为，对通过加工工序被加工而成的层叠体的周缘部进行弯曲加工。即，可以进行使周缘部弯曲的弯曲加工工序。然后，通过在周缘部被弯曲后的层叠体上形成树脂被覆层(进行树脂被覆层形成工序)，能够得到立体形状的树脂成型品。
根据本发明，在由表皮层、缓冲层、芯材层层叠而成的层叠体上设置具有覆盖最下层的底部和覆盖周缘部的围绕部的树脂被覆层而构成树脂成型品。在对树脂被覆层进行模塑成型时，芯材层成为缓冲层的隔热体。因此，使缓冲层受到的来自熔融树脂的热变少，由此避免缓冲层过度软化或熔融。
其结果为，能够构成具有一定程度的大小并且柔软且轻量的树脂成型品。
根据参照附图对以下实施方式进行的说明，上述的目的、特征和优点应易于被理解。
附图说明
图1是本发明的实施方式所涉及的树脂成型品的整体概略立体图。
图2是图1中的II-II线向视剖视图。
图3是用于得到层叠体的加压装置的主要部分概略立体图。
图4A～图4C是得到片材层叠品为止的概略流程图。
图5是在片材上涂布粘接剂的丝网涂布装置的主要部分概略立体图。
图6是对片材层叠品进行裁切加工而得到裁切品的裁切装置的主要部分概略立体图。
图7是对裁切品进行热压而得到工件的热压装置的主要部分概略立体图。
图8是用于对工件进行模塑成型的注射成型装置的主要部分概略纵剖视图。
图9是表示注射成型装置的模腔内的熔融树脂的流动方向的示意说明图。
图10是构成图8的注射成型装置的上模的主要部分放大剖视图。
图11是表示图8所示的注射成型装置进行合模而形成模腔的状态的主要部分概略纵剖视图。
图12是预测为分别在模腔内流动的熔融树脂彼此合流的部位的主要部分放大纵剖视图。
图13是不存在按压部件时的、预测为分别在模腔内流动的熔融树脂彼此合流的部位的主要部分放大纵剖视图。
图14是用于得到树脂成型品的层压装置(laminating machine)的主要部分概略侧视图。
具体实施方式
下面，针对本发明所涉及的树脂成型品，列举在与其制造方法和用于得到该树脂成型品的注射成型装置的关系上优选的实施方式，参照附图详细地进行说明。
图1是本实施方式所涉及的树脂成型品10的整体概略立体图，图2是图1中的II-II线向视剖视图。该树脂成型品10具有层叠体12(主体部)和覆盖该层叠体12并且以仅使其上表面(外观面)露出开口的树脂被覆层14。
如图2所示，层叠体12是芯材层16、缓冲层17、表皮层18的三层结构，将芯材层16设为最下层，将缓冲层17设为中央层，将表皮层18设为最上层。表皮层18的上表面成为用户能够视觉确认的外观面。作为最下层的芯材层16由耐热性优异(换言之，软化点或者熔点足够高)的原材料构成，例如由塑料片材等树脂材料构成。作为这种树脂材料的优选例，可列举出：聚碳酸酯、聚甲基丙烯酸甲酯、聚丙烯、聚乙烯、丙烯腈-丁二烯-苯乙烯共聚物等。
缓冲层17在三层中的厚度最大，而作为层叠体12的主层。即，通过缓冲层17的厚度来调节层叠体12的厚度。缓冲层17柔软而富有弹性，其柔软且富有弹性的程度为在被施加按压力时凹陷，在去除按压力时立刻恢复到原来的形状。而且，为低密度。因此，能够使层叠体12、乃至使树脂成型品10具有柔软性，并且使该树脂成型品10为一定程度的大小，同时实现轻量化。此外，作为表现出如上所述的特性的原材料，可列举出发泡体，尤其作为优选的具体例，可列举出聚氨酯泡沫，也可以为烯烃系、硅酮系的发泡体。
聚氨酯泡沫的软化点或者熔点比聚碳酸酯片材的温度低。即，在该情况下，芯材层16的熔点比缓冲层17的温度高，因此显示出优异的耐热性。
表皮层18例如能够由布、弹性体、纸等柔软的原材料形成，但优选为选择合成皮革、人造皮革、天然皮革中的至少任一一种材料。这是因为在该情况下能得到触感良好，并且具有高档感且外表优异的外观面。
在层叠体12上，形成有从长度方向中央偏向一端部侧的环形槽20，并且在该环形槽20内设置有相对于环形槽20相对突出的台阶部22。台阶部22在俯视观察时大致为长方形形状，在其四个角部形成有截面呈大致正圆形的有底孔24。
台阶部22例如能够用作设置一些装饰品的部位，有底孔24可以用作用于插入销等的部件，该销可用来安装该装饰品。
环形槽20的底面和有底孔24的底面均为封闭的壁面。因此，即使在外观面上附着有雨水等水滴，也能够防止该水滴从环形槽20、有底孔24浸入树脂成型品10的内部。
树脂被覆层14由覆盖层叠体12的外观面(表皮层18)的背面的底部26和围绕层叠体12的周缘部的围绕部28构成。即，表皮层18的上表面从树脂被覆层14露出，因此，如上所述，用户能够把露出的上表面当作外观面进行视觉确认。
层叠体12的周缘部被埋入围绕部28的内部。换言之，围绕部28以内封(封入)周缘部的一部分的状态紧贴于该周缘部。通过该封入和紧贴，对层叠体12的周缘部与围绕部28之间进行密封。通过该密封，能够防止水滴等从层叠体12与树脂被覆层14之间浸入树脂成型品10的内部。
作为树脂被覆层14的原材料，选择能够与芯材层16熔接或者能够与芯材层16通过粘合剂接合的材料。具体而言，优选丙烯腈-丁二烯-苯乙烯(ABS)树脂、聚甲基丙烯酸甲酯(PMMA)树脂、聚碳酸酯(PC)树脂等。
通过伴随熔融树脂的注射的模塑成型而制作树脂被覆层14，能够得到这样的树脂成型品10。下面，说明树脂成型品10的制造方法。
首先，制作层叠体12。因此，首先，切割出成为芯材层16、缓冲层17、表皮层18的芯材用片材102(参照图4A)、缓冲用片材104、图3所示的表皮用片材106和第一粘接用片材34a、第二粘接用片材34b(参照图4A)。将表皮用片材106重叠于第一粘接用片材34a上，在该状态下，载置于构成加压装置110的传送带112上。加压装置110具有加压辊114，当传送带112进行环绕动作时，第一粘接用片材34a和表皮用片材106的层叠物被加压辊114按压。其结果为，得到第一粘接用片材34a的一端面与表皮用片材106接合而成的第一重叠体120。
同样地，将芯材用片材102与第二粘接用片材34b的一端面接合，在此之后，将缓冲用片材104与另一端面接合，得到图4A所示的第二重叠体122。也可以颠倒芯材用片材102与缓冲用片材104的接合顺序。
而且，如图4B所示，将构成第一重叠体120的第一粘接用片材34a的另一端面与缓冲用片材104的一端面接合。据此，如图4C所示，得到片材层叠品38，该片材层叠品38在芯材用片材102(芯材层16)与缓冲用片材104(缓冲层17)之间介装有第二粘接用片材34b，并且在缓冲用片材104(缓冲层17)与表皮用片材106(表皮层18)之间介装有第一粘接用片材34a。
也可以使用图5所示的胶状粘接剂130来代替第一粘接用片材34a、第二粘接用片材34b这样的片材(带)状的粘接剂。在该情况下，只要利用丝网涂布装置132进行胶状粘接剂130的涂布(印刷)即可。
对该方法进行概略说明，丝网涂布装置132具有支承台134和丝网136。在支承台134上载置有涂布胶状粘接剂130的涂布对象物，例如芯材用片材102。另一方面，胶状粘接剂130被供给到丝网136上，通过在该丝网136上进行移动的刮板138被展开并且通过丝网136以规定的图案涂布于芯材用片材102的一端面。
接着，将缓冲用片材104重叠于芯材用片材102的涂布有胶状粘接剂130的一端面。与上述相同，通过加压辊114按压这样得到的半成品，使芯材用片材102与缓冲用片材104接合。
同样，将胶状粘接剂130涂布于缓冲用片材104的一端面，再载置表皮用片材106而得到重叠体。与上述相同，若通过加压辊114按压该重叠体，则使缓冲用片材104与表皮用片材106接合而得到片材层叠品38(参照图4C)。
片材层叠品38被切割为适当的长度。通过利用图6所示的裁切装置40对该片材层叠品38进行裁切加工(加工工序)，而切割出形成有开口48和与该开口48的四个角部相连的孔部50的大致长孔形状的裁切品42。
接着，利用图7所示的热压装置44进行热压。其结果为，在裁切品42上形成与热压装置44的凹部成型部51相对应的凹部46。开口48和孔部50位于该凹部46内。另外，在该热压中，进行使裁切品42的周缘部弯曲的弯曲加工。据此，得到形成有凹部46、该凹部46内的开口48、与开口48相连的孔部50，并且周缘部被弯曲的工件52。此外，四个孔部50沿着工件52的厚度方向、即所述片材层叠品38的层叠方向延伸。另外，周缘部的弯曲方向为芯材层16侧。
此外，也可以在进行热压时形成凹部46、开口48和孔部50来代替上述方式。
接着，进行通过注射成型来进行的模塑成型(树脂层形成工序)。图8是用于进行该注射成型的注射成型装置60的主要部分概略纵剖视图。注射成型装置60具有作为第一模具的下模62和作为第二模具的上模64。下模62是被定位固定的固定模，上模64是在未图示的升降机构的作用下接近或者远离下模62的可动模。
在下模62上，形成有通过流道与浇口相连的两个注入部66a、66b。注入部66a、66b在接近工件52的长度方向的各端部的位置开口。此外，如图9和图12所示，被从注入部66a、66b注射的熔融树脂SR分别按照箭头A、箭头B所示的方向各自流动。并且，推测为在作为注入部66a、66b的大致中间点的P1、P2处合流。
在与预测为流动的熔融树脂SR彼此合流的P1、P2相对应的部分分别设置有按压销68(按压部件)。按压销68从芯材层16侧按压并支承工件52。
在一方的上模64上设置有朝下模62突出的环形突起70。在该环形突起70的内侧，被划分出用于保持工件52的保持部72。另外，在上模64上突出形成有进入凹部46内的环形凸部74。
而且，具有四根杆75的气缸(cylinder)76被定位固定于上模64，并且在所述杆75的各顶端上设置有滑动销78(滑动部件)。此外，在图8中，示出了四根滑动销78中的两根。所述杆75在上模64所设置的杆孔79内，能够沿接近或者远离模腔80(参照图11)的方向进行位移。当然，滑动销78也随之一体地位移。
树脂成型品10利用该注射成型装置60按照以下的方式进行制作。
即，首先，使如上所述得到的工件52保持于如图8所示的保持部72。因此，只要将工件52以芯材层16面向下侧的姿态输送到保持部72附近，而且施加朝向上模64的按压力即可。在此，工件52的表面面积比由环形突起70所划分的保持部72的面积稍大。因此，如图10所示，工件52的周缘部位于环形突起70的稍外侧。在该状态下，若对工件52进一步施加按压力，则工件52的周缘部被环形突起70弯曲。即，在该时间点，对工件52的周缘部进一步实施弯曲加工。通过该弯曲加工，工件52乃至树脂成型品10成为立体的形状。
其结果为，工件52在周缘部的形状成为与环形突起70的形状相符的形状状态下，被压入环形突起70内，并且表皮层18与上模64的顶面抵接且周缘部与环形突起70的内侧侧面抵接。另外，环形凸部74以其外壁沿着凹部46的内壁的方式进入。通过所述压入，从环形突起70向工件52的周缘部作用按压力，并且从环形凸部74向凹部46的内壁作用按压力，工件52被保持部72保持。
另外，气缸76被施力(被通电)，使杆75朝向下模62下降。其结果为，滑动销78插入工件52所形成的孔部50，在此之后从该孔部50突出。这样一来，通过将滑动销78插入孔部50，使工件52更有效地被上模64保持。
接着，升降机构被施力(被通电)，上模64朝向下模62下降。最终上模64与下模62紧贴而进一步合模，并且如图11所示形成模腔80。此时，按压销68在图9所示的P1、P2处按压工件52。在图12中示出该状态。通过该按压，防止工件52的一部分被朝向下模6 2挤出。
接着，从未图示的注射机构注射熔融树脂SR。熔融树脂SR从浇口经过流道，从注入部66a、66b注入模腔80内。此时，从注入部66a注入的熔融树脂SR按照箭头A进行流动，从注入部66b注入的熔融树脂SR按照箭头B进行流动。预测为双方的熔融树脂SR在P1、P2或者其附近处合流(参照图9)。
在合流点附近，工件52受到来自彼此相反的方向进行流动的熔融树脂SR的按压。因此，在不存在按压销68的状况下，如图13所示，受到来自两方向的按压的部位朝合流点被挤出，而担心会产生压曲。
与此相对，在本实施方式中，通过按压销68按压工件52(参照图12)。因此，即使工件52在P1、P2处受到熔融树脂SR来自两方向的按压，也能有效防止工件52被挤出、或作为其结果朝下模62挠曲。即，能够消除产生压曲的担心。
熔融树脂SR的一部分通过工件52的开口48，而被填充于环形凸部74内。通过使该部分的熔融树脂SR固化，而形成环形槽20和台阶部22(参照图1)。此外，在该填充期间，杆75沿远离模腔80的方向进行位移(上升)。滑动销78随之一体地位移，在该位移轨迹处形成空间。熔融树脂SR也进入该空间。
滑动销78的顶端不会脱离孔部50。因此，能够避免在熔融树脂SR的注入时引起工件52的位置偏移的情况。并且，根据滑动销78残留于孔部50内而在台阶部22上形成有底孔24。如上所述，形成台阶部22和环形槽20，其中，所述台阶部22形成有底孔24。
结果，根据本实施方式，能够在对树脂被覆层14进行模塑成型时同时形成能够用作安装部的台阶部22。即，不需要利用其他工序、其他装置来制作台阶部22，也不需要使台阶部22与工件52进行接合。因此，能够实现设备投资的低廉化、树脂成型品10的制造成本的削减。
而且，如上所述，在台阶部22上所形成的有底孔24的底面被封闭。因此，能够消除水滴等从有底孔24浸入树脂成型品10的内部的担心。
另外，熔融树脂SR覆盖芯材层16的整体并且围绕工件52的周缘部。在结束规定量的熔融树脂SR的注入之后，该熔融树脂SR伴随着冷却而固化，据此，形成具有覆盖芯材层16的底部26和内封(封入)工件52的周缘部的围绕部28的树脂被覆层14，从而得到树脂成型品10。
在以上的过程中，熔融树脂SR主要与耐热性比缓冲层17优异(高熔点)的芯材层16接触。因此，能够避免缓冲层17被暴露于熔融树脂SR的热中而熔融，据此能够得到具有规定的厚度并且柔软而轻量的树脂成型品10。
另外，围绕部28包入预先被弯曲的工件52的周缘部。该被弯曲而成的周缘部相对于围绕部28发挥所谓的锚定效果。因此，使树脂被覆层14难以从层叠体12(工件52)脱落。因此，能够提高树脂成型品10的可靠性，并且长时间使用该树脂成型品10。
然后，进行开模，从上模64将树脂成型品10取下。为了取下，例如只要通过未图示的顶出梢将树脂成型品10推出即可。
在围绕部28的背面上，朝外观面侧凹陷的痕迹孔被形成于与按压销68相对应的位置。该痕迹孔位于通常不会被用户视觉确认到的背面，因此不会损害树脂成型品10的美观。
本发明并不特别限定于上述的实施方式，能够在不脱离本发明的主旨的范围内进行各种变更。
例如，树脂成型品10当然能够用作除了智能钥匙的壳体以外的物品。在电波辐射不会造成问题的用途中，也可以由金属构成芯材层16。
而且，注入部可以为一个，也可以为三个以上。无论设为哪一种，只要针对熔融树脂SR的流动进行模拟，在预测到合流的位置配置按压销68即可。当注入部为一个时，熔融树脂SR暂时分支后进行合流。在预测到该合流的位置配置按压销68。
在注入部66a、66b的位置不同的注射成型装置的情况下也同样，针对熔融树脂SR的流动进行模拟，在预测到合流的位置配置按压销68。据此，能够有效地避免在工件52上产生压曲。
而且，也可以由带状片材制作片材层叠品38。在该情况下，只要使用图14所示的层压装置29即可。
层压装置29具有第一主辊30a～第三主辊30c。在这些第一主辊30a～第三主辊30c上分别卷绕成为芯材层16、缓冲层17、表皮层18的芯材用片材102、缓冲用片材104、表皮用片材106的带状片材。另外，在第一主辊30a与第二主辊30b之间，第二主辊30b与第三主辊30c之间，分别设置有第一副辊32a和第二副辊32b，在这些第一副辊32a和第二副辊32b上，分别卷绕有第一粘接用片材34a、第二粘接用片材34b。即，第一主辊30a～第三主辊30c为原材料供给辊，第一副辊32a和第二副辊32b为粘接剂供给辊。
在第一主辊30a～第三主辊30c、第一副辊32a和第二副辊32b的片材送出方向的下游侧，设置有一组加压用辊36a、36b。各片材102、104、106被这些加压用辊36a、36b加压，并且通过第一粘接用片材34a、第二粘接用片材34b进行接合。
然后，从第一主辊30a～第三主辊30c分别送出芯材用片材102、缓冲用片材104、表皮用片材106，并且从第一副辊32a和第二副辊32b送出第一粘接用片材34a、第二粘接用片材34b。从第一副辊32a送出的第一粘接用片材34a介装于芯材用片材102(芯材层16)与缓冲用片材104(缓冲层17)之间，从第二副辊32b送出的第二粘接用片材34b介装于缓冲用片材104(缓冲层17)与表皮用片材106(表皮层18)之间。
五张片材被加压用辊36a、36b汇集在一起，并且在通过加压用辊36a、36b时被加压。通过该加压，芯材用片材102与缓冲用片材104隔着第一粘接用片材34a彼此被临时接合，并且缓冲用片材104与表皮用片材106隔着第二粘接用片材34b彼此被临时接合。据此，得到片材层叠品38(参照图4C)。
在切割出片材层叠品38制成裁切品42之后，与上述同样进行热压、弯曲加工和模塑成型，据此，得到具有层叠体12和树脂被覆层14的树脂成型品10，其中，所述层叠体12包括芯材层16、缓冲层17和表皮层18。
为了得到片材层叠品38，也可以使用作为所谓的涂布机(coater)而公知的涂布设备。在该情况下，只要通过涂布机以在各片材102、104、106上形成涂层的方式涂布胶状粘接剂130，在此之后，将片材102、104、106彼此接合即可。
为了得到片材层叠品38，也可以通过燃烧器等烤制表皮用片材106。在该情况下，缓冲用片材104与表皮用片材106的熔融的一表面压接。在该情况下，由于能够不使用胶状粘接剂130或者粘接用片材34a、34b而接合表皮用片材106与缓冲用片材104，据此，能够实现材料成本的减少。

Claims (9)

1.一种树脂成型品(10)，其具有层叠体(12)和树脂被覆层(14)，其中，所述层叠体(12)由表皮层(18)、缓冲层(17)、芯材层(16)层叠而成；所述树脂被覆层(14)具有底部(26)和围绕部(28)，其特征在于，
所述层叠体的最下层被所述底部覆盖，并且所述层叠体的周缘部被所述围绕部围绕，且所述表皮层的上表面露出成为外观面，
所述层叠体的周缘部被埋入所述围绕部的内部。
2.根据权利要求1所述的树脂成型品，其特征在于，
所述芯材层的熔点比所述缓冲层高。
3.根据权利要求1所述的树脂成型品，其特征在于，
所述层叠体从所述外观面侧起，按照所述表皮层、所述缓冲层、所述芯材层的顺序层叠而构成，
所述芯材层为所述最下层。
4.根据权利要求1所述的树脂成型品，其特征在于，
所述表皮层由合成皮革、人造皮革、天然皮革中的至少任一种构成。
5.根据权利要求1所述的树脂成型品，其特征在于，
所述缓冲层由聚氨酯泡沫构成。
6.根据权利要求1所述的树脂成型品，其特征在于，
所述芯材层由聚碳酸酯片材构成。
7.一种树脂成型品(10)的制造方法，所述树脂成型品(10)具有层叠体(12)和树脂被覆层(14)，其中，所述层叠体(12)由表皮层(18)、缓冲层(17)、芯材层(16)层叠而成；所述树脂被覆层(14)具有底部(26)和围绕部(28)，
所述制造方法的特征在于，
具有得到树脂成型品的树脂被覆层形成工序，
在该工序中，将所述层叠体收装于注射成型装置(60)的模腔(80)内，对熔融树脂(SR)进行注射成型，使所述熔融树脂固化来形成具有覆盖所述层叠体的最下层的底部(26)和埋入了所述层叠体的周缘部的围绕部(28)的树脂被覆层(14)，并且所述表皮层的上表面从所述树脂被覆层露出成为外观面。
8.根据权利要求7所述的制造方法，其特征在于，
具有将所述层叠体加工为规定的形状的加工工序，对通过所述加工工序被加工而成的所述层叠体进行所述树脂被覆层形成工序。
9.根据权利要求8所述的制造方法，其特征在于，
具有对通过所述加工工序被加工而成的所述层叠体的周缘部进行弯曲加工的弯曲加工工序，对通过所述弯曲加工工序使周缘部弯曲后的所述层叠体进行所述树脂被覆层形成工序。
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