CN219105783U

CN219105783U - Injection molding busbar with high sealing performance

Info

Publication number: CN219105783U
Application number: CN202223553600.XU
Authority: CN
Inventors: 夏明慧; 施卫建; 马汀; 许统财; 季文帅
Original assignee: Interplex Suzhou Precision Engineering Ltd
Current assignee: Interplex Suzhou Precision Engineering Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-30
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses an injection molding busbar with high tightness, which comprises a busbar for transmitting electric power or signals, wherein an injection molding part is coated at the middle section of the busbar, the injection molding part is used for insulation, installation and fixation, a sealing strip is arranged between the busbar and the injection molding part, and the sealing strip is one or two of an elastic adhesive tape, an elastic adhesive ring, a double-wall heat-shrinkable tube and a three-wall heat-shrinkable tube which are arranged in a winding manner; through the mode, the sealing strip is simple in structure, the contact position of the busbar and the injection molding piece is free of a groove, a bulge or a hole structure, the sealing strip structure is coated on the outer surface of the busbar and is completely coated inside the injection molding piece, the sealing strip has good elasticity, can be well bonded with the busbar and the injection molding piece, excellent sealing performance is provided, the working environment on two sides of the busbar is isolated or one side of the medium is isolated through the sealing structure, the pressure is arranged on the side of the medium, leakage is prevented, and the sealing strip is simple in structure manufacture, high in efficiency and free of influence on an injection molding process.

Description

Injection molding busbar with high sealing performance

Technical Field

The utility model relates to the technical field of injection molding busbar, in particular to an injection molding busbar with high sealing performance.

Background

The injection molding busbar is used in the fields of traditional automobiles, new energy automobiles, electrical equipment and the like, and is particularly applied to occasions in which one end is immersed in a pressurized liquid environment and the other end is in a normal pressure environment or is isolated from the environments at two ends of the injection molding busbar.

In the prior art, two sealing modes of the injection molding busbar are usually adopted, the first mode is to use a rubber sealing ring, the elasticity of the rubber sealing ring is utilized to endow sealing performance, the sealing performance is completely dependent on the elastic deformation of the sealing ring, but the used busbar is in a round bar shape, and a groove is designed on the round bar to fix the sealing ring. In addition, a plurality of concave-convex parts are designed on the busbar, the tightness is improved by increasing the contact area between the busbar and the injection molding material and prolonging the gap length, and the defect that the tightness is poor is that the busbar has complex structural design, high cost and influence on the current-carrying capacity.

Disclosure of Invention

The utility model aims to solve the problems of limitation and high cost of the injection molding busbar seal.

In order to solve the technical problems, the utility model adopts a technical scheme that: the utility model provides a female row of moulding plastics with high leakproofness, including being used for transmitting electric power or signal female row, female middle section cladding of arranging has the injection molding, the injection molding is used for insulating and the fixed effect of installation, be provided with the sealing strip between female row and the injection molding, the sealing strip is one kind or two kinds of combination in the elastic adhesive tape, elastic adhesive ring, double-walled pyrocondensation pipe, the three-walled pyrocondensation pipe of winding setting.

Preferably, the busbar is linear or I-shaped, the injection molding piece comprises a sealing table and a positioning disc which are integrally molded by engineering plastic in an injection molding mode, and the sealing strip is sealed in the positioning disc.

Preferably, the winding thickness of the sealing strip is 1 mm-3 mm.

Preferably, the elastic adhesive tape and the elastic adhesive ring are polymethyl methacrylate, and both sides are sticky.

Preferably, the double-wall heat-shrinkable tube is composed of two layers, wherein the inner layer is a modified hot melt adhesive, and the outer layer is irradiation crosslinking polyolefin; the three-wall heat shrinkage pipe is composed of three layers, wherein the inner layer is a modified hot melt adhesive, the middle layer is irradiation crosslinking polyolefin, and the outer layer is a high-melting-point modified hot melt adhesive.

The beneficial effects of the utility model are as follows:

the injection molding busbar with high sealing performance provided by the utility model has the advantages that the structure is simple, the contact position of the busbar and the injection molding piece is free of a groove, a bulge or a hole structure, the sealing strip structure is coated on the outer surface of the busbar and is completely coated inside by the injection molding piece, the injection molding busbar has good elasticity, the sealing strip can be well bonded with the busbar and the injection molding piece, excellent sealing performance is endowed, the working environment at two sides of the busbar is isolated or one side medium is isolated through the sealing structure, the pressure is arranged at the medium side, leakage is prevented, the structure is simple to manufacture, the efficiency is high, the injection molding process is not influenced, the cost is low, the effect is good, and the technical popularization value is good.

Drawings

FIG. 1 is a schematic view of an injection molding busbar with high sealing performance;

FIG. 2 is a schematic diagram of an I-shaped busbar according to the present utility model;

FIG. 3 is a schematic view of a busbar of the present utility model in a straight line configuration;

the components in the drawings are marked as follows:

1. a busbar; 2. an injection molding; 21. a sealing table; 22. a positioning plate; 3. and (5) a sealing strip.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

Examples:

as shown in fig. 1 and fig. 2, an injection molding busbar with high tightness comprises a busbar 1, wherein the busbar 1 is a copper bar or an aluminum bar and is used for transmitting power or signals, the busbar 1 is linear or I-shaped, the two ends of the linear busbar are moderate in size, and rubber rings or sleeves are easy to sleeve; the terminal of the I-shaped busbar is large in size, and a rubber ring or a sleeve with proper size cannot be sleeved. The middle section of the busbar 1 is coated with the injection molding part 2, the injection molding part 2 is formed by injection molding of an injection molding machine, the busbar has good high temperature resistance, oil resistance, hydrolysis resistance and other performances, the contact position of the busbar 1 and the injection molding part 2 has no structures such as bulges, grooves, hollows, corners and the like, no special design is adopted, the structure and the material are the same as those of other positions, and the whole busbar carrying capacity is the same.

As shown in fig. 1 and 2, the injection molding 2 has the functions of insulation and installation and fixation, and the injection molding 2 has the specific structure that: sealing table 21 and positioning disk 22 of engineering plastics integrated into one piece's of moulding plastics are provided with sealing strip 3 between busbar 1 and the injection molding 2, and its winding thickness is preferably between 1mm ~ 3mm, and sealing strip 3 seals in positioning disk 22, and sealing strip 3 sets up to one or two kinds of combinations in winding elasticity sticky tape, elasticity sticky ring, double-walled pyrocondensation pipe, the three-wall pyrocondensation pipe, wherein: the elastic adhesive tape and the elastic adhesive ring are polymethyl methacrylate, and both sides are sticky; the double-wall heat shrinkage pipe consists of two layers, wherein the inner layer is a modified hot melt adhesive, and the outer layer is irradiation crosslinking polyolefin; the three-wall heat shrinkage pipe is formed by three layers, wherein the inner layer is a modified hot melt adhesive, the middle layer is irradiation crosslinking polyolefin, and the outer layer is a high-melting-point modified hot melt adhesive; the busbar with different shapes/different materials is different in the condition of the applicable sealing strip, and the specific steps are as follows:

when the busbar is a copper bar and the size of the terminals at two sides is larger, namely the I-shaped copper bar, a rubber ring or a sleeve with proper size cannot be sleeved, the sealing structure is preferably manufactured by winding an elastic adhesive tape on the busbar, and the temperature resistance is between-40 and 180 ℃; the sealing structure is characterized in that the sealing structure is marked on the busbar, then the elastic viscose tape is used for winding and injection molding is carried out, so that the sealing effect is achieved, the adhesive tape can be compressed under the action of injection molding pressure, the self viscosity and elasticity of the adhesive tape can provide double sealing effects, and the sealing structure well fills and bonds gaps between the busbar and an injection molding piece;

when the busbar is a copper bar and the size of the terminals at two sides is moderate, namely, the linear copper bar, the sealing structure preferably uses an elastic viscose ring as the sealing structure, and the temperature resistance is-40-180 ℃; the special operation is, mark seal structure position on the copper bar earlier, then with elasticity viscose snare in this position, carry out the injection molding again to reach sealed effect, under the effect of injection molding pressure, the rubber ring can be compressed, its self stickness and elasticity can provide double seal effect, seal structure fine packing and bond the gap between copper bar and the piece of moulding plastics.

When the busbar is an aluminum row, the terminal sizes at two sides are moderate, the sleeve is easy, the temperature resistant temperature is between-40 and 125 ℃, the sealing structure is preferably a double-wall heat-shrinkable tube, the sealing structure is firstly marked on the aluminum row, the double-wall heat-shrinkable tube is sleeved at the position and put into a baking oven, the inner glue is melted and adhered to the surface of the aluminum row after heat shrinkage on the aluminum row, injection molding is carried out, and the double-wall heat-shrinkable tube and an injection molding piece are mutually fused to form a co-fusion layer under the action of high temperature, so that the injection molding piece and the double-wall heat-shrinkable tube are well bonded, and the sealing effect is achieved.

When the busbar is an aluminum busbar and the terminal sizes at two sides are moderate, but the injection molding temperature is lower, and a co-melted layer cannot be formed to form a sealed application scene, the temperature resistant temperature is-40-90 ℃, the sealing material is preferably a three-wall heat shrinkage tube, the sealing material is specifically operated to mark the sealing structure position on the copper busbar, the three-wall heat shrinkage tube is sleeved at the position and put into an oven, the temperature is not higher than 90 ℃, the heat shrinkage tube is arranged on the busbar, the inner glue can melt and adhere to the surface of the aluminum busbar, then injection molding is carried out, and the outer glue is mutually fused with an injection molding piece under the action of high temperature to form the co-melted layer, so that the injection molding piece and the three-wall heat shrinkage tube are well bonded, and the sealing effect is achieved.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. Injection molding busbar with high sealing performance is characterized in that: including female row (1) that is used for transmitting electric power or signal, the interlude cladding of female row (1) has injection molding (2), injection molding (2) are used for insulating and installation fixed effect, be provided with sealing strip (3) between female row (1) and injection molding (2), sealing strip (3) are one or two kinds of combinations in the elasticity sticky tape, elasticity sticky ring, double-walled pyrocondensation pipe, the three-wall pyrocondensation pipe that the winding set up.

2. An injection molding busbar with high tightness according to claim 1, characterized in that: the busbar (1) is linear or I-shaped, the injection molding piece (2) comprises a sealing table (21) and a positioning disc (22) which are integrally molded by engineering plastics through injection molding, and the sealing strip (3) is sealed in the positioning disc (22).

3. An injection molding busbar with high tightness according to claim 1, characterized in that: the winding thickness of the sealing strip (3) is 1 mm-3 mm.

4. An injection molding busbar with high tightness according to claim 1, characterized in that: the elastic adhesive tape and the elastic adhesive ring are polymethyl methacrylate, and both sides are sticky.

5. An injection molding busbar with high tightness according to claim 1, characterized in that: the double-wall heat-shrinkable tube consists of two layers, wherein the inner layer is a modified hot melt adhesive, and the outer layer is irradiation crosslinked polyolefin; the three-wall heat shrinkage pipe is composed of three layers, wherein the inner layer is a modified hot melt adhesive, the middle layer is irradiation crosslinking polyolefin, and the outer layer is a high-melting-point modified hot melt adhesive.