WO2012024832A1 - 具有金属件和塑胶的成型产品及其成型方法 - Google Patents

具有金属件和塑胶的成型产品及其成型方法 Download PDF

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Publication number
WO2012024832A1
WO2012024832A1 PCT/CN2010/076317 CN2010076317W WO2012024832A1 WO 2012024832 A1 WO2012024832 A1 WO 2012024832A1 CN 2010076317 W CN2010076317 W CN 2010076317W WO 2012024832 A1 WO2012024832 A1 WO 2012024832A1
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plastic
metal member
metal
mold
molding method
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PCT/CN2010/076317
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English (en)
French (fr)
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苏俊守
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深圳庆和胶粘制品有限公司
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Priority to PCT/CN2010/076317 priority Critical patent/WO2012024832A1/zh
Publication of WO2012024832A1 publication Critical patent/WO2012024832A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14311—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts

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  • the present invention relates to a molded product and a molding method thereof, and more particularly to a molded product having a metal member and a plastic and a molding method thereof.
  • Portable electronic products must meet the requirements of strength and other quality while meeting the requirements of communication and appearance.
  • Portable electronic products are affected by their light weight and thin thickness, and are prone to cracking or breaking after accidental fall.
  • researchers In order to solve the strength problem, researchers generally use materials with high strength and moderate flexibility. If the material itself is not structurally strong, metal parts are usually added by in-mold molding (insert Molding or assembly (Assemb1y) metal to ensure the strength of electronic products.
  • a molding method which is a metal in-mold bond injection molding (MAM) technology, which directly integrates metal and plastic in a mold.
  • MAM metal in-mold bond injection molding
  • the technology has low requirements for metal sheets, and it is not necessary to buckle the design to achieve plasticity. Combined with high strength, it simplifies metal processing, improves yield and reduces costs.
  • the bonding force between the plastic surface and the metal surface is relatively poor. Even when the metal grain surface is treated, the combined effect is still not ideal in the drop and tension side test.
  • metal parts are placed in the mold, some parts of the metal parts are embedded in the plastic parts, which can also increase the bonding strength between the metal parts and the plastic parts, but the structure of the metal parts tends to be complicated, and the product is added.
  • the difficulty in structural design is not conducive to large-scale production, and is not conducive to cost savings.
  • the technical problem to be solved by the present invention is to provide a metal member and a plastic product with high bonding strength and a molding method thereof to solve the problems of low bonding strength in the existing molding method.
  • the technical solution adopted to solve the technical problem of the present invention is to provide a molding method of a molded product having a metal member and a plastic, and the molding method includes the following steps:
  • Step 1 opening a plurality of grooves on the inner surface of the metal member
  • Step two preheating the metal member and filling the groove with hot melt adhesive
  • Step 3 placing the metal piece with the hot sol in the second step into the master mold of the mold, heating the mold, injecting the plastic into the master mold and filling the master mold to form the plastic and the metal parts into one body. Formed products of metal parts and plastics.
  • a plurality of grooves are formed in the metal member by etching or laser engraving.
  • the temperature of the preheated metal member is from 100 ° C to 150 ° C.
  • the master mold in the third step, is heated to a temperature greater than 60 ° C by a water temperature or oil temperature heating method.
  • the metal member is one of iron, aluminum, aluminum alloy, copper, magnesium, magnesium alloy, and stainless steel.
  • Another technical solution adopted to solve the technical problem of the present invention is to provide a molded product having a metal member and a plastic, which is obtained by the above molding method.
  • the present invention has the following advantages: 1. A plurality of grooves are formed on the inner side of the metal member so that the hot melt adhesive is fixed in position and firmly bonded during injection molding; 2. the injection is injected through the mold to reduce the processing. The process can avoid the situation of hot melt adhesive overflow, and improve the yield of product manufacturing and improve the appearance quality of the product.
  • FIG. 1 is a plan view showing a first embodiment of a metal member in a molded product of a metal member and a plastic according to the present invention
  • Figure 2 is a front elevational view of the metal member of Figure 1;
  • Figure 3 is a partial cross-sectional view showing the first embodiment of the metal member of the present invention and the molded product of the plastic after molding;
  • Figure 4 is a partial cross-sectional view showing the second embodiment of the metal member of the present invention and the molded product of the plastic after molding;
  • Figure 5 is a partial cross-sectional view showing a third embodiment of the metal member in the present invention.
  • Figure 6 is a partial cross-sectional view showing a fourth embodiment of the metal member in the present invention.
  • the invention provides a molding product and a molding method thereof, which are used for molding a metal piece and a plastic to form a molded product, and the molded product structure is as shown in FIG. 1 to FIG. 3, and the molding product includes a setting.
  • the metal member 1 on the outer side, the adhesive layer 2, and the plastic 3 disposed on the inner side.
  • At least one groove 12 is opened on the inner side of the metal member 1.
  • the bonding layer 2 is typically a hot melt adhesive.
  • the size of the opening of the groove 12 is smaller than the size of the inside of the groove 12.
  • the function of the groove 12 is to ensure that the hot melt can be fixed at the relevant position when filling and injecting in the mold, so that the fusion effect is good and the overflowing is prevented.
  • the purpose of arranging the opening of the groove 12 to be smaller than the size of the inside of the groove 12 is to increase the bonding force of the hot melt adhesive and the metal member, and is not easily moved in the subsequent injection molding. Position, wash away.
  • Fig. 4 is a partial cross-sectional view showing the second embodiment of the metal member of the present invention and the molded product of the plastic after molding.
  • the inner side of the metal member 20 is provided with two side by side grooves 22. According to the needs of the bonding effect, the present invention can also open at least three side by side grooves.
  • FIG. 5 is a partial cross-sectional view showing a third embodiment of the metal member in the present invention
  • the inside of the metal member 30 is provided with a groove 32 of another shape, and at least two can be opened.
  • Side by side grooves Fig. 6 is a partial cross-sectional view showing a fourth embodiment of the metal member of the present invention, in which the inner side of the metal member 40 is provided with grooves 42 of other shapes, and at least two side by side grooves can be opened.
  • the shape of the groove of the metal member can be various, regular or irregular.
  • the plastic can be used to make an electronic product casing, for example, polycarbonate (PC) having a molecular weight of 20,000 to 60,000 and/or polymethyl methacrylate (PMMA) having a molecular weight of 20,000 to 200,000, ABS, and the like.
  • PC polycarbonate
  • PMMA polymethyl methacrylate
  • the metal member material is not particularly limited. It is preferably a metal having a lighter material and a higher strength. For example, iron, aluminum, aluminum alloy, copper, magnesium, magnesium alloy and stainless steel.
  • the structure of the metal member is designed by the designer according to the structure of the plastic product.
  • the bonding layer is used for bonding the metal member and the plastic surface, and the thickness of the bonding layer is determined according to the size of the product, preferably from 0.1 to 0.2 mm.
  • the bonding layer is preferably a hot melt adhesive, which is a solvent-free, moisture-free 100% solid fusible polymer which is solid at room temperature and heated. Melting to a certain temperature becomes a liquid that can flow and has a certain viscosity.
  • the hot melt adhesive is composed of a base resin, a tackifier, a viscosity modifier, and an antioxidant.
  • the composition of the hot melt adhesive is not particularly limited in the present invention. In order to avoid the phenomenon that the hot melt adhesive is over-melted in the subsequent injection molding process, the hot melt adhesive needs to have a certain heat resistance, and the hot melt is required.
  • the heat resistance of the glue is greater than 220 °C.
  • the molding method of the molded product of the metal member and the plastic of the present invention comprises the following steps:
  • Step 1 opening a plurality of grooves on the inner surface of the metal member
  • Step two preheating the metal member and filling the groove with hot melt adhesive
  • Step 3 placing the metal piece with the hot sol in the second step into the master mold of the mold, heating the mold, injecting the plastic into the master mold and filling the master mold to form the plastic and the metal parts into one body. Formed products of metal parts and plastics.
  • a plurality of grooves are formed in the metal member by etching or laser engraving.
  • the metal member can be preheated to a certain temperature, preferably 100-150 ° C, more preferably, the heating temperature is 110 ° C, and then the hot melt adhesive is pressed onto the metal member by using a jig, at least the metal is The hot melt adhesive in the groove of the piece is melted and firmly bonded.
  • the above pressing time is 3-7 seconds, preferably 6 seconds.
  • the mold mold side is heated by the water temperature or the oil temperature through the mold, and the mold side mold temperature is greater than 60 ° C.
  • the plastic and the hot melt adhesive having a certain temperature have good properties. Engagement.
  • the invention has the following advantages: 1. A plurality of grooves are formed on the inner side of the metal member so that the hot melt adhesive is fixed at the time of injection molding and firmly bonded; 2. The injection is injected through the mold to reduce the processing flow and avoid heat. The situation in which the glue melts over the glue and improves the yield of the product and improves the appearance quality of the product.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

具有金属件和塑胶的成型产品及其成型方法 技术领域
本发明涉及一种成型产品及其成型方法，尤其涉及一种具有金属件和塑胶的成型产品及其成型方法。
背景技术
随着科学技术的发展，便携式电子产品在满足通讯，外观等要求的同时，还必须满足强度等品质的要求。便携式电子产品由于它们的重量轻和厚度薄而影响其强度，在不小心跌落后容易出现开裂或断裂等现象。研究人员为了解决强度问题，一般会选用强度较高且柔韧性适中的材料。如果材料本身结构强度不够，则一般会加入金属件采用模内注塑(insert molding)或则装配(Assemb1y)金属等方式保证电子产品的强度。
对于大面积金属的嵌入，往往需要在金属片上打孔或则增加扣位等处理，加工复杂，良率不高，从而导致成本偏高。同时由于塑胶和金属的结合强度不高，金属加工复杂，往往导致研究人员在设计和材料的选择上有所局限。
目前有一种成型方法为金属模内粘结注塑(MAM)技术，直接将金属和塑胶在模具内一体成型，该技术对于金属片的要求较低，不常要扣位等设计即可达到是塑胶和全属高强度结合，简化了金属加工工艺，提高良品率，降低成本。但是在金属产品没有扣位的情况下，塑胶面和金属面之间的结合力比较差，即使时金属纹面进行处理，在跌落和拉力侧试中，结合效果仍然不够理想。如果把金属件放在模内注塑，让金属件的一些部位镶嵌到塑胶件里面，这样也可以增加金属件与塑胶件的结合强度，但是这样金属件的结构往往会很复杂，增加了产品在结构设计上的难度，不利于大规模生产，也不利于节约成本。
 技术问题
本发明要解决的技术问题在于提供一种结合强度高的具有金属件和塑胶成产品及其成型方法以解决现有成型方法中结合强度不高等问题。
技术解决方案
解决本发明的技术问题所采用的技术方案是：提供一种具有金属件和塑胶的成型产品的成型方法，所述成型方法包括如下步骤：
步骤一、在金属件的内表面开设有多个凹槽；
步骤二、预热所述金属件且将热熔胶填满所述凹槽；
步骤三、将步骤二中的带有所述热溶胶的金属件放置于模具的母模内，加热所述模具，向母模内射出塑胶并充填母模从而将塑胶和金属件成型为一体以形成金属件和塑胶的成型产品。
在本发明的成型方法中，在步骤一中，通过蚀刻或激光雕刻的方式在所述金属件开设多个凹槽。
在本发明的成型方法中，在步骤二中，预热金属件的温度为100℃-150℃。
在本发明的成型方法中，在步骤三中，通过水温或油温的加热方式将母模加热至大于60℃。
在本发明的成型方法中，所述金属件为铁、铝、铝合金、铜、镁、镁合金及不锈钢中的一种。
解决本发明的技术问题所采用的另一技术方案是：提供一种具有金属件和塑胶的成型产品，所述具有金属件和塑胶的成型产品由上述成型方法制得。
 有益效果
相交于现有技术，本发明有以下优点：1、在金属件的内侧开设有多个凹槽使得热熔胶在射出成型时位置固定且粘合牢固；2、通过模内充填射出，减少加工流程，可避免热熔胶溢胶的情况，并提高产品制造的良品率与改善产品外观质量。
附图说明
下面将结合附图及实施方式对本发明作进一步说明，附图中：
图1是本发明金属件和塑胶的成型产品中金属件第一实施例的俯视图；
图2是图1中金属件的主视图；
图3是本发明金属件的第一实施例和塑胶的成型产品在成型之后的部分剖视图；
图4是本发明金属件的第二实施例和塑胶的成型产品在成型之后的部分剖视图；
图5是本发明中的金属件的第三实施例的部分剖视图；
图6是本发明中的金属件的第四实施例的部分剖视图。
 本发明的最佳实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施方式，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施方式仅仅用以解释本发明，并不用于限定本发明。
本发明提供的一种成型产品及其成型方法，该成型方法是用于将金属件和塑胶成型在一起而形成成型产品，该成型产品结构如图1至图3所示，该成型产品包括设置在外侧的金属件1，粘结层2，以及设置在内侧的塑胶3。该金属件1的内侧开设有至少一个凹槽12。该粘结层2一般为热熔胶。该凹槽12的开口处的尺寸比凹槽12的内部的尺寸要小。该凹槽的12作用是在模内填充射出时，确保热溶胶可以固定在相关位置，可让融合效果良好，并防止溢胶的情况发生。将该凹槽12的开口处的尺寸设置成比凹槽12的内部的尺寸小的目的是使得热熔胶与金属件的粘结作用力增大，以及在随后的射出成型中，不易被移动位置、冲走。
如图4所示，图4是本发明金属件的第二实施例和塑胶的成型产品在成型之后的部分剖视图。该金属件20的内侧开设有两个并排的凹槽22。根据粘结效果的需要，本发明还可以开设至少三个并排的凹槽。
此外，如图5和图6所示，图5是本发明中的金属件的第三实施例的部分剖视图，该金属件30的内侧开设有另一形状的凹槽32，可以开设至少两个并排的凹槽。图6是本发明中的金属件的第四实施例的部分剖视图，该金属件40的内侧开设有其他形状的凹槽42，可以开设至少两个并排的凹槽。可以理解，在本发明中，金属件的凹槽的形状可以有多种，有规则形状的，也有不规则形状的。
所述塑胶可用于制作电子产品外壳，例如，可以为分子量为20000-60000的聚碳酸醋(PC)和/或分子量为20000-200000的聚甲基丙烯酸甲脂(PMMA)，ABS等。
所述金属件材料没有特别限制。优选为材质较轻强度较高的金属。例如铁、铝、铝合金、铜、镁、镁合金及不锈钢等。所述金属件的结构由设计人员根据塑胶产品的结构设计。所述粘结层用以粘结金属件和塑胶表面，所述粘结层的厚度根据产品大小而定，优选在0.l~0.2毫米。根据本发明的实施例，粘结层优选为热熔胶，所述热熔胶是一种不需溶剂、不含水分的100%的固体可熔性聚合物，它在常温下为固体，加热熔融到一定温度变为能流动，且有一定粘性的液体。该热熔胶由基本树脂、增粘剂、粘度调节剂和抗氧剂等成分组成。本发明对于热熔胶的组分没有特别的限定，为了避免在后续的注塑工艺中热熔胶过熔产生产品溢胶现象，所述热熔胶需要具有一定的耐热性，所述热熔胶的耐热性大于220℃。
本发明金属件和塑胶的成型产品的成型方法包括如下步骤：
步骤一、在金属件的内表面开设有多个凹槽；
步骤二、预热所述金属件且将热熔胶填满所述凹槽；
步骤三、将步骤二中的带有所述热溶胶的金属件放置于模具的母模内，加热所述模具，向母模内射出塑胶并充填母模从而将塑胶和金属件成型为一体以形成金属件和塑胶的成型产品。
在该步骤一中，通过蚀刻或激光雕刻的方式在该金属件开设多个凹槽。
在该步骤二中，可将金属件预热到一定温度，优选为100-150℃，更好地，加热温度为110℃，再用治具将热熔胶压到金属件上，至少使金属件的凹槽内的热熔胶熔融而粘结牢固。上述压制时间为3-7秒，优选为6秒。
在步骤三中，在充填成型时，模具母模侧通过模具以水温或油温加热之方式，母模侧模具温度为大于60℃，塑胶充填时，具有一定温度的塑胶与热熔胶具有良好的接合。
本发明的有以下优点：1、在金属件的内侧开设有多个凹槽使得热熔胶在射出成型时位置固定且粘合牢固；2、通过模内充填射出，减少加工流程，可避免热熔胶溢胶的情况，并提高产品制造的良品率与改善产品外观质量。
以上所述仅为本发明的较佳实施方式而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (6)

  1. 一种具有金属件和塑胶的成型产品的成型方法，其特征在于：所述成型方法包括如下步骤：
    步骤一、在金属件的内表面开设有多个凹槽；
    步骤二、预热所述金属件且将热熔胶填满所述凹槽；
    步骤三、将步骤二中的带有所述热溶胶的金属件放置于模具的母模内，加热所述模具，向母模内射出塑胶并充填母模从而将塑胶和金属件成型为一体以形成金属件和塑胶的成型产品。
  2. 如权利要求1所述的成型方法，其特征在于：在步骤一中，通过蚀刻或激光雕刻的方式在所述金属件开设多个凹槽。
  3. 如权利要求1所述的成型方法，其特征在于：在步骤二中，预热金属件的温度为100℃-150℃。
  4. 如权利要求1所述的成型方法，其特征在于：在步骤三中，通过水温或油温的加热方式将母模加热至大于60℃。
  5. 如权利要求1所述的成型方法，其特征在于：所述金属件为铁、铝、铝合金、铜、镁、镁合金及不锈钢中的一种。
  6. 一种具有金属件和塑胶的成型产品，其特征在于，所述具有金属件和塑胶的成型产品由权利要求1-5任一项所述的成型方法制得。
PCT/CN2010/076317 2010-08-24 2010-08-24 具有金属件和塑胶的成型产品及其成型方法 WO2012024832A1 (zh)

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CN112497635A (zh) * 2020-11-10 2021-03-16 上海瑞尔实业有限公司 车轮饰盖嵌件注塑工艺
CN114474557A (zh) * 2021-12-31 2022-05-13 深圳市裕展精密科技有限公司 金属塑胶结合件及其形成方法、电子产品壳体
CN116175992A (zh) * 2022-12-14 2023-05-30 湖北三江航天江河橡塑有限公司 塑料内胆与金属接头一体化成型方法

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Publication number Priority date Publication date Assignee Title
CN112497635A (zh) * 2020-11-10 2021-03-16 上海瑞尔实业有限公司 车轮饰盖嵌件注塑工艺
CN114474557A (zh) * 2021-12-31 2022-05-13 深圳市裕展精密科技有限公司 金属塑胶结合件及其形成方法、电子产品壳体
CN114474557B (zh) * 2021-12-31 2023-11-10 富联裕展科技(深圳)有限公司 金属塑胶结合件及其形成方法、电子产品壳体
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