Method for manufacturing photovoltaic connector

Abstract

The invention provides a method for manufacturing a photovoltaic connector, comprising the following steps of: connecting a connector conductive body with a cable conductive body; placing the connector conductive body and the cable conductive body in a forming mold I, melting plastic I and then injecting into the forming mold I, cooling and taking out to finish the injection molding of a connection layer so as to form a connector body, wherein the melting temperature of the plastic I is between 180 DEG C and 250 DEG C; melting plastic II and then injecting into a forming mold II, cooling and taking out to finish the injection molding of a tapered end so as to form the tapered end, wherein the melting temperature of the plastic II is between 160 DEG C and 230 DEG C; and placing the tapered end and the connector body in a forming mold III, melting plastic III and then injecting into the forming mold III, cooling and taking out to finish the injection molding of a sealing layer so as to form the finished connector product, wherein the melting temperature of the plastic III is between 100 DEG C and 150 DEG C. In the invention, the technical process is simple; and the components of the plastic materials are not limited and are wider in choice, thereby having high flexibility in the actual production and being beneficial to controlling the cost.

Description

technical field [0001] The invention relates to the field of connectors, in particular to a method for making a photovoltaic connector. Background technique [0002] With the enhancement of people's awareness of environmental protection, the photovoltaic industry has developed rapidly in recent years. Photovoltaic power generation mainly relies on cells placed in the sun to obtain direct current through photoelectric conversion, and then connects inverters through photovoltaic connectors to form alternating current that can be used directly. Photovoltaic connectors are generally installed in harsh outdoor environments, so photovoltaic connectors must have good performance such as high temperature resistance, low temperature resistance and corrosion resistance, and must also have considerable hardness to achieve compression and deformation resistance. In addition, the heating of the conductor cannot be ignored. [0003] Due to the above reasons, the current photovoltaic conn...

AI Technical Summary

Problems solved by technology

But this kind of production method has very fatal defects. The outer protective layer of the cable has limited high temperature resistance, generally below 180 ° C, and the plastic with a melting temperature above 200 ° C can easily damage the outer protective layer of the cable during the injection molding process, especially The outer protective layer of the cable at the edge of the connector shell is obviously damaged, and this part is often subject to torsion during use. The cable with the outer protective layer is easily broken under the long-term influence of torsion, resulting in serious consequences such as electric leakage.

If the plastic of the connector shell is replaced by a plastic material with a low melting temperature, the problem of damage to the outer protective layer of the cable can be solved well, but the low melting temperature brings about poor high temperature resistance, especially the part directly wrapped around the conductor, which is conductive Experience the large amount of heat that will cause the temperature of the wrapped plastic shell to rise, and the low melting temperature of the wrapped plastic shell will lead to direct melting by the conductor and cause serious consequences

Therefore, the housing of the photovoltaic connector needs to meet the high temperature resistance of the conductor wrapping part and the low melting temperature of the contact part with the cable. Obviously, it is difficult to meet these requirements by using a single injection molding process of a plastic material