WO2022057127A1 - 汽车板簧垫块或压块的坯料及其成品的制备方法 - Google Patents

汽车板簧垫块或压块的坯料及其成品的制备方法 Download PDF

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WO2022057127A1
WO2022057127A1 PCT/CN2020/136935 CN2020136935W WO2022057127A1 WO 2022057127 A1 WO2022057127 A1 WO 2022057127A1 CN 2020136935 W CN2020136935 W CN 2020136935W WO 2022057127 A1 WO2022057127 A1 WO 2022057127A1
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leaf spring
blank
block
nylon
automobile leaf
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PCT/CN2020/136935
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French (fr)
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马仁顺
姚红法
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马仁顺
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
    • C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B60G11/10—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/16—Ethene-propene or ethene-propene-diene copolymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3009—Sulfides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass

Definitions

  • the invention relates to the technical field of automobile parts manufacturing, in particular to a blank of an automobile leaf spring cushion block or a pressing block and a preparation method of the finished product thereof.
  • Leaf spring baffles and leaf spring brackets are a class of products in auto parts. Currently, they are cast and polymerized from caprolactam melt, which has certain standard requirements for the performance of the products themselves. The control of the casting polymerization process and the addition of auxiliary materials have a very important impact on the final properties of the product. In the existing production, the caprolactam crystals are generally melted first. In order to prevent the water from generating pores in the finished product, sodium hydroxide is added for dehydration treatment after melting, and then toluene is added for casting and polymerization. The toughness and strength properties of the product fail to reach the desired indicators. .
  • the present invention provides a preparation method of a blank of an automobile leaf spring pad or a pressing block and a finished product thereof.
  • the performance parameters of the block are better than the performance parameters of the automobile leaf spring block or pressing block prepared from the new material, and the waste utilization of MC nylon scraps can be realized.
  • the present invention provides a blank of an automobile leaf spring pad or briquetting block, which is composed of the following components by weight: 55-65% of MC nylon scraps, 15-25% of toughening agent, and 2 ⁇ 7%, glass fiber 10 ⁇ 20%.
  • the toughening agent is any one of the following or a combination thereof: POE, EPDM.
  • the anti-wear agent is molybdenum disulfide.
  • the MC nylon scraps are scraps of MC nylon products prepared by the following steps: (1) taking caprolactam crystals and melting them at a constant temperature of 150 ⁇ 10°C; (2) preheating the dehydration furnace, and preheating The temperature is 140 ⁇ 10°C, the constant temperature is 2 minutes, the caprolactam melt is transferred to the dehydration furnace, 0.15-0.3% sodium hydroxide, the constant temperature is set at 140 ⁇ 10°C, and the time is controlled for 10 ⁇ 2 minutes to perform dehydration treatment, and then add Shake well with 0.4-0.8% toluene of the weight of the caprolactam melt; (3) the mold is placed horizontally in an oven to preheat, the preheating temperature is 180-190°C, and the temperature is kept for 4 ⁇ 1 minutes, and then the liquid obtained in step (2) is placed Pour it into a mold for polymerization, set the constant temperature to 180-190 °C, keep the temperature for 4 minutes, and place it to cool after the mold is released to obtain an MC nylon product;
  • the invention also provides a method for preparing a blank of an automobile leaf spring pad or compact, comprising the following steps: pulverizing MC nylon scraps ⁇ 280 °C ⁇ 300 °C hot melting ⁇ removing impurities ⁇ cooling ⁇ dicing ⁇ semi-finished PAMC ; Add toughening agent, wear-resistant agent and glass fiber to the semi-finished PAMC and stir evenly ⁇ 280 °C ⁇ 300 °C hot melt ⁇ impurity removal ⁇ cooling ⁇ dicing ⁇ blank finished product.
  • the present invention also provides a method for preparing an automobile leaf spring pad or compact, which is characterized by comprising the following steps: drying the blank particles of the automobile leaf spring pad or compact at 140-150° C. through injection molding Machine into the mold, keeping the injection pressure at 30 ⁇ 50Bar, injection molding; after demoulding, the semi-finished product is obtained, and the semi-finished product is boiled at 100 ° C for 20 to 30 hours, and then finished into the automobile leaf spring pad or compact. .
  • the present invention uses MC nylon scraps, and then adds an appropriate amount of toughening agent, wear-resistant agent and glass fiber as the blank of the automobile leaf spring pad or pressing block, because the MC nylon scrap itself is already MC nylon, and has MC.
  • Nylon has many advantages, such as high toughness and strength, good self-lubricating effect, light weight, great improvement in wear resistance, corrosion resistance and insulation performance; in this application, waste MC nylon scraps are used as automobile leaf spring pads
  • the raw material of block or briquette is added with a toughening agent of 15-25% of the total raw material, which further improves the toughness and strength of the product. If it is less than 15%, the toughness is no better than using new materials.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • This embodiment provides a blank of an automobile leaf spring pad or compact, which is composed of the following components by weight: 60% of MC nylon scrap, 20% of POE and EPDM mixture, 5% of molybdenum disulfide, glass fiber 15%.
  • the blank of the above-mentioned automobile leaf spring spacer block or pressing block is prepared through the following steps:
  • MC nylon leftover material is the leftover material of the MC nylon product prepared through the following steps:
  • the dehydration furnace is preheated first, the preheating temperature is 140 ⁇ 10°C, the constant temperature is 2 minutes, the caprolactam melt is transferred to the dehydration furnace, 0.3% sodium hydroxide, the constant temperature is set at 140 ⁇ 10°C, and the time is controlled Carry out dehydration treatment for 10 ⁇ 2 minutes, then add 0.8% toluene of the weight of the caprolactam melt to shake up;
  • step (3) The mold is placed horizontally in the oven to preheat, the preheating temperature is 180-190°C, and the temperature is kept for 4 ⁇ 1 minutes. Then the liquid obtained in step (2) is poured into the mold for polymerization, and the constant temperature is set at 180-190°C, and the temperature is kept warm. For 4 minutes, after the mold is released, it is placed to cool to obtain MC nylon products;
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • This embodiment provides a blank for an automobile leaf spring spacer or compact, which is composed of the following components by weight: 56% of MC nylon scraps, 25% of ethylene-propylene copolymer A-C540A, 5% of molybdenum disulfide , glass fiber 14%.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • This embodiment provides a blank of an automobile leaf spring pad or compact, which is composed of the following components by weight: 65% of MC nylon scrap, 16% of EPDM, 5% of molybdenum disulfide, and 14% of glass fiber.
  • the dehydration furnace is preheated first, the preheating temperature is 140 ⁇ 10°C, the constant temperature is 2 minutes, the caprolactam melt is transferred to the dehydration furnace, 0.3% sodium hydroxide, the constant temperature is set at 140 ⁇ 10°C, and the time is controlled Carry out dehydration treatment for 10 ⁇ 2 minutes, then add 0.8% toluene of the weight of the caprolactam melt to shake up;
  • step (3) The mold is placed horizontally in the oven to preheat, the preheating temperature is 180-190°C, and the temperature is kept for 4 ⁇ 1 minutes. Then the liquid obtained in step (2) is poured into the mold for polymerization, and the constant temperature is set at 180-190°C, and the temperature is kept warm. After 4 minutes, place the car leaf spring spacer or pressure block to cool down after the mold is released.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
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Abstract

一种汽车板簧垫块或压块的坯料及其成品的制备方法，汽车板簧垫块或压块的坯料由以下重量百分比的组分组成，MC尼龙下脚料55～65％，增韧剂15～25％、耐磨剂2～7％，玻璃纤维10～20％。使用MC尼龙下脚料制备出的汽车板簧垫块或压块的性能参数比使用新料制备的汽车板簧垫块或压块好，且能实现MC尼龙下脚料的废物利用。

Description

汽车板簧垫块或压块的坯料及其成品的制备方法 技术领域
本发明涉及汽车零部件制造技术领域，特别涉及一种汽车板簧垫块或压块的坯料及其成品的制备方法。
背景技术
板簧挡板和板簧支架是汽车配件中一类产品，目前采用己内酰胺融化液浇铸聚合而成，对产品自身具备的性能有着一定的标准要求。浇铸聚合过程的控制及辅料的添加对产品最终性能都有相当重要的影响。现有生产中，普遍先将己内酰胺晶体融化，为了防止其中水份对成品产生气孔，融化后加入氢氧化钠进行脱水处理，然后加入甲苯后，浇铸聚合，产品韧性与强度性能未能达理想指标。
发明内容
发明目的：针对现有技术中存在的问题，本发明提供一种汽车板簧垫块或压块的坯料及其成品的制备方法，通过使用MC尼龙下脚料制备出的汽车板簧垫块或压块的性能参数比使用新料制备出的汽车板簧垫块或压块的性能参数好，且能实现MC尼龙下脚料的废物利用。
技术方案：本发明提供了一种汽车板簧垫块或压块的坯料，由以下重量百分比的组分组成，MC尼龙下脚料55～65％，增韧剂15～25％、耐磨剂2～7％，玻璃纤维10～20％。
优选地，所述增韧剂为以下任意一种或其组合：POE、EPDM。
优选地，所述耐磨剂为二硫化钼。
优选地，所述MC尼龙下脚料是通过以下步骤制备得到的MC尼龙制品的下脚料：(1)取己内酰胺晶体在150±10℃恒温下融化；(2)脱水炉先进行预热，预热温度140±10℃，恒温时间2分钟，将己内酰胺融化液转至脱水炉中，0.15-0.3％的氢氧化钠，恒温设定140±10℃，时间控制10±2分钟进行脱水处理，然后加入己内酰胺融化液重量的0.4-0.8％的甲苯进行摇匀；(3)模具先水平放置于烘箱内预热，预热温度180-190℃，保温4±1分钟，再将步骤(2)所得液体倒入模具中聚合，恒温设定180-190℃，保温4分钟，出模后放置冷却得MC尼龙制品；(4)将所述MC尼龙制品的边角多余毛边或后续精加工过程中产生的边角料或毛刺余料作为所述MC尼龙下脚料。
本发明还提供了一种汽车板簧垫块或压块的坯料的制备方法，包括以下步骤：将MC尼龙下脚料粉碎→280℃～300℃热熔→去杂质→冷却→切粒→半成品PAMC；向所述半成品 PAMC中加入增韧剂、耐磨剂和玻璃纤维搅拌均匀→280℃～300℃热熔→去杂质→冷却→切粒→坯料成品。
本发明还提供了一种制备汽车板簧垫块或压块的方法，其特征在于，包括以下步骤：将汽车板簧垫块或压块的坯料颗粒在140～150℃下烘干后通过注塑机注入模具，保持注塑压力为30～50Bar，注塑成型；脱模后得到半成品，将所述半成品在100℃下水煮20～30小时后，精加工成所述汽车板簧垫块或压块。。
有益效果：本发明使用MC尼龙下脚料，再加入适量的增韧剂、耐磨剂和玻璃纤维作为汽车板簧垫块或压块的坯料，由于MC尼龙下脚料本身已经是MC尼龙，具有MC尼龙所具备的众多优点，如韧性强度较高，自润滑效果好，重量轻，耐磨、防腐和绝缘性能均有较大的提升；本申请中利用废弃的MC尼龙下脚料作为汽车板簧垫块或压块的原料，在其中加入原料总量15～25％的增韧剂，进一步提高了产品的韧性强度，如低于15％则韧性没有比使用新料更好，如高于25％则硬度变低，不符合要求；同时加入原料总量2～7％的耐磨剂，提高最终汽车板簧垫块或压块产品的耐磨性能，加入量低于2％，则耐磨性能没有明显提高，高于7％则会使材料的强度等力学性能下降；另外还加入原料总量10～20的玻璃纤维，如低于10％，则强度和刚性不达标，如高于20％，则会使材料变脆，易断裂；因此辅料掺入比例适量很重要。
具体实施方式
下面结合具体实施例对本发明进行详细的介绍。
实施方式1：
本实施方式提供了一种汽车板簧垫块或压块的坯料，由以下重量百分比的组分组成，MC尼龙下脚料60％，POE和EPDM的混合物20％、二硫化钼5％，玻璃纤维15％。
上述汽车板簧垫块或压块的坯料，通过以下步骤制备而成：
将MC尼龙下脚料粉碎→280℃～300℃热熔→去杂质→冷却→切粒→半成品PAMC；
向半成品PAMC中加入增韧剂、耐磨剂和玻璃纤维搅拌均匀→280℃～300℃热熔→去杂质→冷却→切粒→坯料成品。
上述MC尼龙下脚料是通过以下步骤制备得到的MC尼龙制品的下脚料：
(1)取己内酰胺晶体在150±10℃恒温下融化；
(2)脱水炉先进行预热，预热温度140±10℃，恒温时间2分钟，将己内酰胺融化液转至脱水炉中，0.3％的氢氧化钠，恒温设定140±10℃，时间控制10±2分钟进行脱水处理，然后加入己内酰胺融化液重量的0.8％的甲苯进行摇匀；
(3)模具先水平放置于烘箱内预热，预热温度180-190℃，保温4±1分钟，再将步骤(2)所得液体倒入模具中聚合，恒温设定180-190℃，保温4分钟，出模后放置冷却得MC尼龙制品；
(4)将MC尼龙制品的边角多余毛边或后续精加工过程中产生的边角料或毛刺余料作为MC尼龙下脚料。
使用上述坯料制备汽车板簧垫块或压块的方法如下：
将坯料颗粒在145℃下烘干后通过注塑机注入模具，保持注塑压力为40Bar，注塑成型；
脱模后得到半成品，将所述半成品在100℃下水煮24小时后，精加工成汽车板簧垫块或压块。
实施方式2：
本实施方式提供了一种汽车板簧垫块或压块的坯料，由以下重量百分比的组分组成，MC尼龙下脚料56％，乙烯-丙烯共聚物A-C540A 25％、二硫化钼5％，玻璃纤维14％。
上述汽车板簧垫块或压块的坯料的制备方法以及MC尼龙下脚料的制备方法均与实施方式1中完全相同，此处不做赘述。
使用上述坯料制备汽车板簧垫块或压块的方法如下：
将坯料颗粒在145℃下烘干后通过注塑机注入模具，保持注塑压力为50Bar，注塑成型；
脱模后得到半成品，将所述半成品在100℃下水煮24小时后，精加工成汽车板簧垫块或压块。
实施方式3：
本实施方式提供了一种汽车板簧垫块或压块的坯料，由以下重量百分比的组分组成，MC尼龙下脚料65％，EPDM 16％、二硫化钼5％，玻璃纤维14％。
上述汽车板簧垫块或压块的坯料的制备方法以及MC尼龙下脚料的制备方法均与实施方式1中完全相同，此处不做赘述。
使用上述坯料制备汽车板簧垫块或压块的方法如下：
将坯料颗粒在145℃下烘干后通过注塑机注入模具，保持注塑压力为30Bar，注塑成型；
脱模后得到半成品，将所述半成品在100℃下水煮24小时后，精加工成汽车板簧垫块或压块。
对比例：
(1)取己内酰胺晶体在150±10℃恒温下融化；
(2)脱水炉先进行预热，预热温度140±10℃，恒温时间2分钟，将己内酰胺融化液 转至脱水炉中，0.3％的氢氧化钠，恒温设定140±10℃，时间控制10±2分钟进行脱水处理，然后加入己内酰胺融化液重量的0.8％的甲苯进行摇匀；
(3)模具先水平放置于烘箱内预热，预热温度180-190℃，保温4±1分钟，再将步骤(2)所得液体倒入模具中聚合，恒温设定180-190℃，保温4分钟，出模后放置冷却得汽车板簧垫块或压块。
对实施方式1、2和3及对比例制备出的汽车板簧垫块或压块进行性能检测，检测结果如下表所示。
表1
Figure PCTCN2020136935-appb-000001
从表1可以看出，使用MC尼龙下脚料，再加入适量的增韧剂、耐磨剂和玻璃纤维制作而成的汽车板簧垫块或压块，相较于使用新料制备出的汽车板簧垫块或压块，其拉伸强度、弯曲强度、简支梁冲击强度(23℃)、简支梁冲击强度(23℃)以及硬度D都有较高的提升。
上述实施方式只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人能 够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所做的等效变换或修饰，都应涵盖在本发明的保护范围之内。

Claims (6)

  1. 一种汽车板簧垫块或压块的坯料，其特征在于，由以下重量百分比的组分组成，MC尼龙下脚料55～65％，增韧剂15～25％、耐磨剂2～7％，玻璃纤维10～20％。
  2. 根据权利要求1所述的汽车板簧垫块或压块的坯料，其特征在于，所述增韧剂为以下任意一种或其组合：
    POE、EPDM。
  3. 根据权利要求1所述的汽车板簧垫块或压块的坯料，其特征在于，所述耐磨剂为二硫化钼。
  4. 根据权利要求1至3中任一项所述的汽车板簧垫块或压块的坯料的制备方法，其特征在于，所述MC尼龙下脚料是通过以下步骤制备得到的MC尼龙制品的下脚料：
    (1)取己内酰胺晶体在150±10℃恒温下融化；
    (2)脱水炉先进行预热，预热温度140±10℃，恒温时间2分钟，将己内酰胺融化液转至脱水炉中，0.15-0.3％的氢氧化钠，恒温设定140±10℃，时间控制10±2分钟进行脱水处理，然后加入己内酰胺融化液重量的0.4-0.8％的甲苯进行摇匀；
    (3)模具先水平放置于烘箱内预热，预热温度180-190℃，保温4±1分钟，再将步骤(2)所得液体倒入模具中聚合，恒温设定180-190℃，保温4分钟，出模后放置冷却得MC尼龙制品；
    (4)将所述MC尼龙制品的边角多余毛边或后续精加工过程中产生的边角料或毛刺余料作为所述MC尼龙下脚料。
  5. 一种如权利要求1至4中任一项所述的汽车板簧垫块或压块的坯料的制备方法，其特征在于，包括以下步骤：
    将MC尼龙下脚料粉碎→280℃～300℃热熔→去杂质→冷却→切粒→半成品PAMC；
    向所述半成品PAMC中加入增韧剂、耐磨剂和玻璃纤维搅拌均匀→280℃～300℃热熔→去杂质→冷却→切粒→坯料成品。
  6. 一种使用权利要求1至4中任一项所述的汽车板簧垫块或压块的坯料制备汽车板簧垫块或压块的方法，其特征在于，包括以下步骤：
    将坯料颗粒在140～150℃下烘干后通过注塑机注入模具，保持注塑压力为30～50Bar，注塑成型；
    脱模后得到半成品，将所述半成品在100℃下水煮20～30小时后，精加工成所述汽车板簧垫块或压块。
PCT/CN2020/136935 2020-09-15 2020-12-16 汽车板簧垫块或压块的坯料及其成品的制备方法 WO2022057127A1 (zh)

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