阅读说明：本技术 一种金属骨架与聚氨酯的粘接工艺 (Bonding process of metal framework and polyurethane ) 是由 王文进 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种金属骨架与聚氨酯的粘接工艺,包括下列步骤：S1、加工成型金属骨架；S2、金属骨架表面清洗；S3、金属骨架表面涂胶；S4、金属骨架与聚氨酯复合整体式密封件制备。本发明的金属骨架与聚氨酯的粘接工艺通过超声波处理金属材料,涂胶处理提高金属材料的表面能；通过超声波处理可以清理金属材料表面的污染及残留,通过涂胶处理来活化金属材料表面,提高表面能及亲水性,从而增强金属表面以聚氨酯材料的粘接强度,能够很好地将聚氨酯与金属骨架复合在一起形成复合材料,且复合粘接牢固,力学性能好,解决了聚氨酯与高强度金属材料粘接问题,减少产品脱胶现。(The invention discloses a bonding process of a metal framework and polyurethane, which comprises the following steps: s1, processing and forming the metal framework; s2, cleaning the surface of the metal framework; s3, gluing the surface of the metal framework; s4, preparing the metal framework and polyurethane composite integral sealing element. According to the bonding process of the metal framework and the polyurethane, the metal material is treated by ultrasonic waves, and the surface energy of the metal material is improved by gluing; the ultrasonic treatment can clean up pollution and residue on the surface of the metal material, the surface of the metal material is activated through gluing treatment, the surface energy and the hydrophilicity are improved, the bonding strength of the polyurethane material on the surface of the metal is enhanced, the polyurethane and a metal framework can be well compounded together to form a composite material, the composite bonding is firm, the mechanical property is good, the problem of bonding of the polyurethane and the high-strength metal material is solved, and the product degumming phenomenon is reduced.)

1. A bonding process of a metal framework and polyurethane is characterized by comprising the following steps:

s1, processing and forming metal framework

Turning and molding a metal material, and processing to obtain a metal framework with a specific shape;

s2, cleaning the surface of the metal framework

Then, cleaning dirt and waste residue on the surface of the metal framework by ultrasonic treatment of the metal framework obtained in the step S1;

s3, coating adhesive on the surface of the metal framework

Gluing the surface of the metal framework processed in the step S1, and drying; then placing the glued metal framework into an injection mold, and fixing the position of the metal framework;

s4, preparation of metal framework and polyurethane composite integral sealing element

Weighing polyurethane, drying at 80-100 ℃ until the water content is less than 0.05%, then feeding the polyurethane into an injection molding machine for melting, then injecting the polyurethane into an injection mold with the metal framework by adopting an injection molding process, bonding and compounding the polyurethane and the surface of the metal framework, and coating the metal framework to obtain the metal framework and polyurethane composite integral sealing element.

2. The process of claim 1, wherein in step S1, the metal material is SPCC cold rolled steel.

3. The bonding process of the metal framework and the polyurethane as claimed in claim 1, wherein in step S3, the thickness of the glue applied to the surface of the metal framework treated in step S1 is 0.8-1.2 mm.

4. The process of claim 3, wherein in step S3, the adhesive applied to the surface of the metal framework treated in step S1 is an aqueous polyurethane adhesive.

5. The bonding process of the metal framework and the polyurethane as claimed in claim 1, wherein in step S3, the drying is performed at 80-85 ℃ for 4-6 min.

6. The process of claim 1, wherein in step S4, the injection molding process is used, the injection pressure is 76-82 MPa, and the pressure holding time is 6-8S.

7. A metal framework and polyurethane composite integral sealing element is characterized by being prepared by adopting the bonding process of the metal framework and polyurethane according to any one of claims 1 to 6.

Technical Field

The invention relates to the technical field of composite material preparation, in particular to a bonding process of a metal framework and polyurethane.

Background

Polyurethanes, which are polymers containing urethane groups in the main chain of a macromolecule, are called polyurethanes, and are classified into two major classes, polyester polyurethanes and polyether polyurethanes. Polyurethanes have many excellent properties and therefore have a wide range of uses.

The application of any material has its limitations, and the development of composite technology integrates the advantages of different materials and improves the resistance of a single material to its working environment. The polyurethane material has excellent wear resistance, but has high friction coefficient, large internal heat generation, poor heat conduction effect of a contact surface and rapid heat accumulation, so that the mechanical property of the polyurethane material is reduced.

In order to meet the market demand, the applicant develops a polyurethane and metal material composite integral sealing element, the framework adopts high-performance high-strength SPCC cold-rolled steel, the high-performance high-strength SPCC cold-rolled steel is turned and formed, and then the high-performance high-strength SPCC cold-rolled steel is integrally bonded with polyurethane injection molding encapsulation, so that the product has better sealing performance and lighter weight.

The bonding process of the metal framework and the polyurethane used at present has the following problems:

the metal material has low surface crystallinity and surface energy, so that the problem of insufficient bonding force and degumming problem caused by bonding with the polyurethane material is solved, the partial slight degumming of the product can cause the failure of the whole sealing element, and the high-strength bonding property is extremely important.

Based on the situation, the invention provides a bonding process of a metal framework and polyurethane, which can effectively solve the problems.

Disclosure of Invention

The invention aims to provide a bonding process of a metal framework and polyurethane. According to the bonding process of the metal framework and the polyurethane, the metal material is treated by ultrasonic waves, and the surface energy of the metal material is improved by gluing; the surface of the metal material can be cleaned from pollution and residues through ultrasonic treatment, the surface of the metal material is activated through gluing treatment, and the surface energy and the hydrophilicity are improved, so that the bonding strength of the polyurethane material on the metal surface is enhanced, the polyurethane and the metal framework can be well compounded together to form a composite material, the composite bonding is firm, the mechanical property is good, the problem of bonding the polyurethane and the high-strength metal material is solved, and the product degumming phenomenon is reduced; the advantages of two different materials of polyurethane and a metal framework can be integrated, and the resistance of a single material to the working environment of the material is improved.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

a bonding process of a metal framework and polyurethane comprises the following steps:

s1, processing and forming metal framework

Turning and molding a metal material, and processing to obtain a metal framework with a specific shape;

s2, cleaning the surface of the metal framework

Then, cleaning dirt and waste residue on the surface of the metal framework by ultrasonic treatment of the metal framework obtained in the step S1;

s3, coating adhesive on the surface of the metal framework

Gluing the surface of the metal framework processed in the step S1, and drying; then placing the glued metal framework into an injection mold, and fixing the position of the metal framework;

s4, preparation of metal framework and polyurethane composite integral sealing element

Weighing polyurethane, drying at 80-100 ℃ until the water content is less than 0.05%, then feeding the polyurethane into an injection molding machine for melting, then injecting the polyurethane into an injection mold with the metal framework by adopting an injection molding process, bonding and compounding the polyurethane and the surface of the metal framework, and coating the metal framework to obtain the metal framework and polyurethane composite integral sealing element.

According to the bonding process of the metal framework and the polyurethane, the metal material is treated by ultrasonic waves, and the surface energy of the metal material is improved by gluing; the surface of the metal material can be cleaned from pollution and residues through ultrasonic treatment, the surface of the metal material is activated through gluing treatment, and the surface energy and the hydrophilicity are improved, so that the bonding strength of the polyurethane material on the metal surface is enhanced, the polyurethane and the metal framework can be well compounded together to form a composite material, the composite bonding is firm, the mechanical property is good, the problem of bonding the polyurethane and the high-strength metal material is solved, and the product degumming phenomenon is reduced; the advantages of two different materials of polyurethane and a metal framework can be integrated, and the resistance of a single material to the working environment of the material is improved.

The bonding process of the metal framework and the polyurethane is simple, convenient to operate and low in cost.

Preferably, in step S1, the metal material is SPCC cold rolled steel.

Preferably, in step S3, the surface of the metal skeleton processed in step S1 is coated with glue to a thickness of 0.8 to 1.2 mm.

Preferably, in step S3, the glue used for gluing on the surface of the metal framework processed in step S1 is an aqueous polyurethane adhesive.

Preferably, in the step S3, the drying is performed at 80-85 ℃ for 4-6 min.

Preferably, in step S4, the injection molding process is adopted, the injection pressure is 76 to 82MPa, and the dwell time is 6 to 8S.

The invention also provides a metal framework and polyurethane composite integral sealing element which is prepared by adopting the bonding process of the metal framework and the polyurethane.

Compared with the prior art, the invention has the following advantages and beneficial effects:

according to the bonding process of the metal framework and the polyurethane, the metal material is treated by ultrasonic waves, and the surface energy of the metal material is improved by gluing; the surface of the metal material can be cleaned from pollution and residues through ultrasonic treatment, the surface of the metal material is activated through gluing treatment, and the surface energy and the hydrophilicity are improved, so that the bonding strength of the polyurethane material on the metal surface is enhanced, the polyurethane and the metal framework can be well compounded together to form a composite material, the composite bonding is firm, the mechanical property is good, the problem of bonding the polyurethane and the high-strength metal material is solved, and the product degumming phenomenon is reduced; the advantages of two different materials of polyurethane and a metal framework can be integrated, and the resistance of a single material to the working environment of the material is improved.

The bonding process of the metal framework and the polyurethane is simple, convenient to operate and low in cost.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.

The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.