CN203805308U - Hot melting head structure - Google Patents

Abstract

A hot-melt head structure, which is used for heat-melting nuts into screw posts, the hot-melt head structure includes: a plastic tube, which is a hollow cylinder with one end open, and the open end of the plastic tube has a ring Edge, when hot-melting, the outer edge of the open end of the plastic tube is used to press against the edge of the screw column, so as to limit the stroke of the nut entering the screw column; the main body of the hot melt is located at In the plastic tube, one end of the hot melt is connected to the end of the plastic tube away from the open end, and the other end of the hot melt is flush with the open end of the plastic tube. The structure of the hot-melt head of the utility model can effectively guarantee the standard of the hot-melt nut, thus avoiding the problem that the nut hot-melt is not in place due to the inaccurate control stroke of the cylinder in the prior art, thus ensuring the quality of the product and at the same time Improve work efficiency.

Description

Hot melt head structure

【Technical field】

The utility model relates to a hot-melt head structure, in particular to a hot-melt head structure capable of hot-melting nuts.

【Background technique】

Most of the shells of currently formed 3C products are made of plastic. However, in the product assembly process, it is inevitable to use nails, that is, to embed nuts into the plastic parts, so that the screws can pass through the nuts. It is convenient to lock the matching shells together.

Therefore, in order to realize the assembly of the product, the screw column (BOSS column) will be formed in the plastic part first, and then the nut (Nut) will be melted into the screw column through the existing hot-melt head structure, but the existing technology The head of the medium heat fusion head structure is flat and has no effective position structure, so the cylinder is only used to control the stroke of the nut entering the screw column during heat fusion, but when the cylinder is used for a long time, it will cause the cylinder The travel of the screw is less and less accurate, so that after heat melting the nut into the screw column, it is often found that the upper surface of the nut is sometimes lower than the upper surface of the screw column, and sometimes higher than the upper surface of the screw column. The upper surface of the above-mentioned screw column far exceeds the standard, thus resulting in a large number of defective products.

In view of this, it is necessary to provide a hot-melt head structure to solve the inaccuracy of the existing hot-melt head structure when the nut is hot-melted.

【Content of invention】

Therefore, the purpose of this utility model is to provide a structure of a hot-melt head to solve the above problems.

In order to achieve the above purpose, the utility model provides a hot-melt head structure, which is applied to heat-melt nuts into screw columns, and the hot-melt head structure includes:

A plastic tube, which is a hollow cylinder with one end open, the open end of the plastic tube has an outer edge, and the outer edge of the open end of the plastic tube is used to press against the edge of the screw column during hot melting, Thereby being used to limit the stroke of the nut entering the screw column;

Hot melt, its main body is set in the plastic tube, one end of the hot melt is connected to the end of the plastic tube away from the open end, and the other end of the hot melt is flush with the open end of the plastic tube .

Preferably, the structure of the hot-melt head also includes a heat-insulating tube, the heat-insulating tube is arranged in the plastic tube and sleeved on the hot-melt body, and the inner wall of the heat-insulating tube and the hot-melt body There is a gap between them.

Preferably, the heat insulation pipe is made of ceramics.

Preferably, the hot melt is a copper core or an iron core.

The hot-melt head structure of the utility model is provided with a plastic tube outside the hot melt, so when the nut is implanted into the screw column with the hot-melt head, when the outer edge of the plastic tube is pressed against the edge of the screw column, Since the other end of the hot melt is flush with the open end of the plastic tube, it can be seen that the nut has been implanted in place in the screw column, so the hot melt head structure is hot melted at this time, which can be well Ensure that the surface of the nut is flush with the surface of the screw column, and the phenomenon of being higher or lower than the surface of the screw column in the prior art will not appear.

Compared with the prior art, the structure of the hot-melt head of the utility model can effectively guarantee the standard of the hot-melt nut, thus avoiding the problem in the prior art that the nut hot-melt is not in place due to the inaccurate control stroke of the cylinder, Therefore, the quality of the product is guaranteed and the work efficiency is improved at the same time.

【Description of drawings】

FIG. 1 is a schematic diagram of the structure of the hot-melt head of the present invention.

FIG. 2 is a schematic cross-sectional view of the structure of the hot-melt head of the present invention.

【Detailed ways】

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

In order to achieve the above purpose, please refer to Fig. 1 and Fig. 2, the hot-melt head structure 100 provided by the present invention is applied to heat-melt nuts into screw columns, and the hot-melt head structure 100 includes:

The plastic tube 110 is a hollow cylinder with one end open, and the open end of the plastic tube 110 has an outer edge 1101, and the outer edge 1101 of the open end of the plastic tube 110 is used to press against the The edge of the screw column, thereby used to limit the stroke of the nut entering the screw column;

Hot melt 120, its main body is set in the plastic tube 110, one end of the hot melt 120 is connected with the end of the plastic tube 110 away from the open end, the other end of the hot melt 120 is connected with the The opening ends of the plastic tubes 110 are flush.

Wherein, the hot-melt head structure 100 also includes a heat-insulation tube 130, the heat-insulation tube 130 is arranged in the plastic tube 110 and sleeved on the hot-melt body 120, the inner wall of the heat-insulation tube 130 is in contact with the There is a space between the hot melts 120 .

Wherein, the heat insulating pipe 130 is made of ceramics.

Wherein, the hot melt 120 is a copper core or an iron core.

During hot melting, the other end of the hot melt 120 absorbs the nut, and the nut is implanted into the screw column. During the implantation process, when the outer edge 1101 of the open end of the plastic tube 110 is pressed against the At the edge of the screw column, it can be seen that the nut has been implanted in place at this time, and the hot-melt head structure 100 is thermally fused at this time, so that the surface of the nut and the surface of the screw column can be well ensured. , the phenomenon of being higher or lower than the surface of the screw column in the prior art will not appear.

In this embodiment, since the hot melt 120 has a very high temperature during hot melting, the material of the plastic tube 110 is selected as a high temperature resistant resin. A layer of heat insulating pipe 130 made of ceramics is added between the melts 120, thereby ensuring the service life of the utility model to a greater extent.

In this embodiment, if the periphery of the screw post has an interference structure, the structure of the hot-melt head is limited by the interference structure and cannot perform thermal fusion. Therefore, in this embodiment, the open end of the plastic tube 110 can be divided It is divided into several parts, and a corresponding space is left between each part to adapt to the interference structure around the screw column.

Compared with the prior art, the hot-melt head structure 100 of the present utility model can effectively guarantee the standard of the hot-melt nut, thus avoiding the problem in the prior art that the nut hot-melt is not in place due to the inaccurate control stroke of the cylinder , thus ensuring the quality of the product while improving work efficiency.

It should be pointed out that the utility model is not limited to the above-mentioned embodiments, and any simple modification, equivalent change and modification made by any skilled person familiar with the profession based on the technical solution of the utility model to the above-mentioned embodiments all fall into the scope of the utility model. scope of protection.

Claims (4)

1. a hot melt header structure, it is applied to screw nut hot melting, in screw column, it is characterized in that, described hot melt header structure comprises:

Plastic pipe, it is the hollow cylinder of an end opening, and the openend of described plastic pipe has a circle outer edge, when hot melt, the outer edge of described plastic pipe openend is used for being pressed on the edge of described screw column, thereby for limiting described nut, enters the stroke of described screw column;

Hot melt, its main body is located in described plastic pipe, and one end of described hot melt is connected with described plastic pipe one end away from described openend, and the other end of described hot melt is concordant with described plastic pipe openend.

2. hot melt header structure according to claim 1, is characterized in that, described hot melt header structure also comprises an instlated tubular, and described instlated tubular is located in described plastic pipe and is sheathed on described hot melt, between described instlated tubular inwall and described hot melt, has spacing.

3. hot melt header structure according to claim 2, is characterized in that, the material of described instlated tubular is pottery.

4. hot melt header structure according to claim 1, is characterized in that, described hot melt is copper core or iron core.