Bonding method and equipment for metal casing and plastic parts

A technology of metal casing and bonding method, which is applied in the field of bonding metal casing and plastic parts and equipment, can solve problems such as metal casing deformation, achieve the effect of solving thermal expansion deformation, simple operation, and stable performance

Active Publication Date: 2011-12-28
苏州常阀阀门设备检修有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the defect that the existing metal casing and plastic parts bonding method will seriously deform the metal casing, so as to provide a non-deformable or less deformable metal casing and plastic part bonding method and its application equipment for the method

Method used

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  • Bonding method and equipment for metal casing and plastic parts
  • Bonding method and equipment for metal casing and plastic parts
  • Bonding method and equipment for metal casing and plastic parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The size of the metal shell involved in the present invention is (length 344×width 214 millimeters), without reinforcement inside, and the middle part is designed with (105×8×0.2 millimeters) LOGO ABC.

[0037] 1) Put the metal shell on the pre-pressing machine for pre-pressing, set the pre-pressing pressure to 0.3Mpa, the temperature to 80°C, and the pre-pressing time to 7S. The hot melt adhesive is 3M 725.

[0038] 2) Hot pressing, after placing the plastic parts and the metal shell on the lower mold, fix the metal shell on the lower mold with locks, pressure plates and side pressure strips, and heat press it with the hot pressing upper mold. The hot pressing pressure is 0.3Mpa, the temperature is 150°C, the hot pressing time is 18S, and the cooling water temperature is 25°C.

[0039] 3) Cold pressing, move the hot-pressed lower die directly below the cold-pressing upper die, and cold-press it with the cold-pressing upper die. The cold pressing pressure is 0.4Mpa, t...

Embodiment 2

[0042] The size of the metal shell involved in the present invention is (length 344×width 214 millimeters), and there is no reinforcement inside.

[0043] 1) Put the metal shell on the pre-pressing machine for pre-pressing, set the pre-pressing temperature to 80°C, and the pre-pressing time to 7S. The hot melt adhesive is 3M 725.

[0044] 2) Hot pressing, after placing the plastic parts and the metal shell on the lower mold, fix the metal shell on the lower mold with locks, pressure plates and side pressure strips, and heat press it with the hot pressing upper mold. The hot pressing pressure is 0.4Mpa, the temperature is 140°C, the hot pressing time is 10S, and the cooling water temperature is 30°C.

[0045] 3) Cold pressing, move the hot-pressed lower die directly below the cold-pressing upper die, and cold-press it with the cold-pressing upper die. The cold pressing pressure is 0.5Mpa, the temperature is 25°C, the cold pressing time is 10S, and the cooling water temperatur...

Embodiment 3

[0048] The size of the metal shell involved in the present invention is (length 344×width 214 millimeters), without reinforcement inside, and the middle part is designed with (105×8×0.2 millimeters) LOGO ABC.

[0049] 1) Put the metal shell on the pre-pressing machine for pre-pressing, set the pre-pressing temperature to 80°C, and the pre-pressing time to 7S. The hot melt adhesive is 3M 725.

[0050] 2) Hot pressing, after placing the plastic parts and the metal shell on the lower mold, fix the metal shell on the lower mold with locks, pressure plates and side pressure strips, and heat press it with the hot pressing upper mold. The hot pressing pressure is 0.3Mpa, the temperature is 195°C, the hot pressing time is 20S, and the cooling water temperature is 25°C.

[0051] 3) Cold pressing, move the hot-pressed lower die directly below the cold-pressing upper die, and cold-press it with the cold-pressing upper die. The cold pressing pressure is 0.6Mpa, the temperature is 30°C, ...

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Abstract

The invention provides a method for bonding a metal shell and a plastic component. The method comprises the following steps: pre-pressing hot melt adhesive in a part of region on the surface of the metal shell to form a hot-melting area with pre-pressed hot melt adhesive and a non-hot-melting area without pre-pressed hot melt adhesive; mounting a plastic component on the hot-melting area; performing the hot melting on the metal shell, wherein the hot melting includes hot-pressing and the cool-pressing; continuously cooling the non-hot-melting area in the hot melting process, enabling the hot-melting area and the non-hot-melting area to be stressed simultaneously with equal pressure. The invention further provides a device for bonding the metal shell and the plastic component. The device comprises an upper die, a lower die, a fixing device and a cooling device, wherein the upper die is divided into a hot-pressing upper die and a cool-pressing upper die, the lower die is used for holding the metal shell, the fixing device is used for fixing the metal shell on the lower die, and the cooling device is connected with the lower die and is used for cooling the non-hot-melting area. According to the method provided by the invention when the non-hot-melting area on the metal surface is cooled, an external force is used to maintain the pressure for stabilizing the metal plane so as to reduce the deformation.

Description

technical field [0001] The invention relates to a bonding method and equipment for a metal shell and a plastic part. Background technique [0002] At present, there are two commonly used bonding methods for metal casings and plastic parts of electronic products: dispensing and double-sided adhesive bonding. Dispensing is prone to glue overflow, and the metal casing of electronic products is a first-class surface, which has very strict requirements on appearance. It is difficult to meet the requirements for appearance with dispensing, and the dispensing process has high requirements on the flatness of materials. The glue is uneven, which will directly affect its appearance and bonding strength. At the same time, because the glue needs a certain curing time, for dispensing glue on a surface with a complex structure and a large area, it takes a long time, the efficiency is low, and a large number of fixtures need to be used. Double-sided adhesive lamination is simple, takes a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/72
Inventor 董菁唐倩张华刘启顺
Owner 苏州常阀阀门设备检修有限公司
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