CN212072690U

CN212072690U - Waterproof construction of secondary usefulness of moulding plastics

Info

Publication number: CN212072690U
Application number: CN202020518839.5U
Authority: CN
Inventors: 谢庆伟; 王衍辉; 郑昕斌; 王文娟; 肖杰; 雷其英
Original assignee: Ningde Dannuo Xicheng Technology Co ltd
Current assignee: Ningde Dannuo Xicheng Technology Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-12-04
Anticipated expiration: 2030-04-10

Abstract

The utility model relates to a mechanical design technical field especially relates to a waterproof construction that secondary was moulded plastics and is used. Through the edge integrated into one piece protruding portion at the mould mold insert that once moulds plastics and form to the filler piece of forming of moulding plastics at the secondary wraps up completely the protruding portion produces when moulding plastics the cooling and embraces tightly the power, reaches the water-proof effects who improves the secondary and mould plastics, through actual detection, adopts the utility model provides a waterproof construction's that secondary was moulded plastics automobile-used equipment can reach IP67 grade.

Description

Waterproof construction of secondary usefulness of moulding plastics

Technical Field

The utility model relates to a mechanical design technical field especially relates to a waterproof construction that secondary was moulded plastics and is used.

Background

The secondary injection molding can make the surface of the product full of soft feeling and can also increase the functionality and added value of the product. Over the past 10 years, secondary injection molding technology has drastically changed consumer product aesthetic standards, design considerations, and functional requirements. The two-shot technique is known for creating "soft-feel surfaces", but it also has many other functions, such as: ergonomic design, bi-color appearance, brand identification, and improved features. By using the technology, the functions of the product can be increased, such as noise reduction, shock absorption, water resistance and collision prevention.

At present, the secondary injection molding technology is often used on vehicle equipment, and although a certain waterproof grade can be achieved, the requirement of IP67 cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: provided is a waterproof structure for secondary injection molding, which can achieve IP67 level.

In order to solve the technical problem, the utility model discloses a technical scheme be:

the waterproof structure for secondary injection molding is arranged in the plastic shell, a mold insert formed by primary injection molding is arranged in the plastic shell, an integrally formed protruding portion is arranged at the edge of the mold insert, filling pieces formed by secondary injection molding are arranged on the surface of the mold insert and the inner side wall of the plastic shell, and the protruding portion is completely wrapped by the filling pieces.

Furthermore, the free end of the protruding part is provided with a bending part different from the protruding direction of the protruding part.

Furthermore, the protruding portion is perpendicular to the side of the mold insert, and the bending portion is perpendicular to the protruding portion and extends towards the inner direction of the plastic shell.

Furthermore, a metal connecting piece penetrating through the filling piece is embedded in the mold insert, and the metal connecting piece is far away from the protruding portion.

Further, the metal connecting piece is provided with at least two turning parts on the part positioned in the mold insert.

Furthermore, the quantity of portion of turning is two, metal connecting piece is including the first linkage segment, second linkage segment and the third linkage segment that connect gradually, first linkage segment sets up with plastic housing internal surface is perpendicular, the second linkage segment sets up with first linkage segment is perpendicular, and the third linkage segment sets up with the second linkage segment is perpendicular.

The beneficial effects of the utility model reside in that:

the utility model provides a waterproof construction that secondary was moulded plastics and is used, edge integrated into one piece protruding portion through the mould mold insert that once moulds plastics and form to the packing that forms is moulded plastics at the secondary wraps up completely the protruding portion produces the power of holding tightly when moulding plastics the cooling, reaches the water-proof effects who improves the secondary and mould plastics, through the actual detection, adopts the utility model provides a waterproof construction's that secondary was moulded plastics automobile-used equipment can reach IP67 grade.

Drawings

FIG. 1 is a schematic structural view of a waterproof structure for secondary injection molding of the present invention;

FIG. 2 is a top view of the waterproof structure for secondary injection molding of the present invention;

fig. 3 is a bottom view of the waterproof structure for secondary injection molding of the present invention;

fig. 4 is a cross-sectional view of a mold insert formed by one-shot injection molding of the present invention;

FIG. 5 is a product structure diagram of the waterproof structure for secondary injection molding of the present invention;

FIG. 6 is a cross-sectional view of FIG. 5;

description of reference numerals:

1. a mold insert; 11. a metal connecting member; 12. a protrusion; 121. a bending section;

2. and a filling member.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Please refer to fig. 1-6, the utility model provides a pair of waterproof construction that secondary was used of moulding plastics sets up in the plastic housing, the mould mold insert that once moulds plastics and form has in the plastic housing, the edge of mould mold insert has integrated into one piece's protruding portion, mould mold insert surface and plastic housing inside wall all are equipped with the filling member that the secondary was moulded plastics and is formed, the filling member wraps up the protruding portion completely.

From the above description, the beneficial effects of the present invention are:

According to the above description, add the kink at the free end of protruding portion, can increase the area of contact between the packing piece that the secondary was moulded plastics and the mould mold insert that once moulds plastics and form, promote and connect closely, and simultaneously, the kink is inequality with the extending direction of protruding portion, can increase the quantity of buckling, show that the contact surface between packing piece and the mould mold insert is nonlinear line, can promote the degree of difficulty of flowing through of moisture gap between the two, thereby effectively prevent to be located the inside electronic components of equipment and wet or lead to the short circuit by the water logging, the problem of damage, through above-mentioned structure, effectively promote waterproof performance, through the actual measurement, can satisfy IP67 standard.

It can be known from the above description that metal connecting piece is used for carrying out the electricity with the electronic components who sets up in both sides and connects, metal connecting piece keeps away from the protruding portion setting, can increase the length of flowing through of moisture from one side to opposite side, and then promotes the degree of difficulty of flowing through.

Can know from above-mentioned description, through above-mentioned structure, even partial moisture gets into from gap between filler outside and the metal connecting piece, nevertheless can be obstructed when the portion of turning round for moisture is difficult to get into inboardly, and then avoids lieing in the inside electronic components of equipment and wet or lead to the problem of short circuit, damage by the water logging, through above-mentioned structure, effectively promotes metal connecting piece's waterproof performance, through the actual measurement, can satisfy IP67 standard.

Referring to fig. 1 to 6, a first embodiment of the present invention is:

the utility model provides a pair of waterproof construction of usefulness is moulded plastics to secondary sets up in the plastic casing.

The method comprises the steps that injection molding is carried out in a mold smaller than a plastic shell in advance, a mold insert 1 embedded with a metal connecting piece 11 is formed, the metal connecting piece 11 is used for electrically connecting electronic components arranged on two sides of the plastic shell, and meanwhile, an integrally-formed protruding portion 12 is arranged at the edge of the mold insert 1, wherein the metal connecting piece is far away from the protruding portion, the flowing length of water from one side to the other side can be increased, and the flowing difficulty is further improved.

The free end of the projection 12 is provided with a bend 121 different from the direction of projection of the projection. The method specifically comprises the following steps: the protruding portion is perpendicular to the side of the mold insert where the protruding portion is located, and the bending portion is perpendicular to the protruding portion and extends towards the direction of the inside of the plastic shell. And then placing the mold insert into the plastic shell, so that the plastic shell is internally provided with the mold insert formed by one-time injection molding.

And the surface of the mold insert and the inner side wall of the plastic shell are both provided with filling pieces 2 formed by secondary injection molding, and the protruding parts 12 are completely wrapped by the filling pieces 2.

The metal connecting piece 11 has at least two bent portions at a portion thereof located in the mold insert. In this embodiment, the quantity of turning portion is two, metal connecting piece is including the first linkage segment, second linkage segment and the third linkage segment that connect gradually, first linkage segment and the perpendicular setting of plastics casing inner surface, the second linkage segment sets up with first linkage segment is perpendicular, and the third linkage segment sets up with the second linkage segment is perpendicular. Through above-mentioned structure, even partial moisture gets into from gap between filler outside and the metal connecting piece, nevertheless can be obstructed when turning round the portion for moisture is difficult to get into inboardly, and then avoids lieing in the inside electronic components of equipment and wets or by the water logging and leads to the problem of short circuit, damage, through above-mentioned structure, effectively promotes metal connecting piece's waterproof performance, through the actual measurement, can satisfy IP67 standard.

In this embodiment, the edge of the opening that the filler 2 surface that the secondary was moulded plastics and is formed corresponding metal connecting piece 11 and worn out is equipped with the direction inclined plane, the highest department on direction inclined plane compares the lowest department on direction inclined plane is closer to the opening setting, the hydrophobic material of coating on the surface on direction inclined plane. Through above-mentioned structural design, can avoid moisture to get into in the gap between opening and the metal connecting piece as far as possible, further promote waterproof performance. In practical design, the inclination of the inclined surface ranges from 45 ° to 60 °, preferably 60 °. The hydrophobic material adopts any one of PTFE, FEP, ECTE, ETFE and PFA in fluorocarbon paint, and is common weather-resistant insulating hydrophobic paint.

It should be noted that IP67 is capable of resisting soaking in water with a depth of 1 meter for 30 minutes, while in production, the test in water is often converted into a gas-tight test, and by verification, gas with a pressure value of 10000 pa is input into the product, and when the detected gas leakage does not exceed 150 pa, the product is considered to be qualified IP 67.

When the air pressure value of the air is 10000 Pa, the air leakage (Pa) detection of the four joints of the primary injection molding and the secondary injection molding is finished within 3 seconds after the air inflation for 10 seconds, and the detected related data are as shown in the following table 1.

Sample numbering	1	2	3	4
					Existing solutions	275 Pa	221 Pa	320 Pa	285 Pa
This scheme	56 Pa	62 Pa	73 Pa	68 Pa

TABLE 1

According to the data in the table 1, it is obvious that the waterproof structure for secondary injection molding provided by the scheme can obviously improve the waterproof performance and meet the IP67 standard.

To sum up, the utility model provides a waterproof construction that secondary was moulded plastics and is used through the edge integrated into one piece protruding portion at the mould mold insert that once moulds plastics and form to the filler piece that the secondary was moulded plastics and is formed wraps up completely the protruding portion produces when moulding plastics the cooling and embraces the power, reaches the water-proof effects who improves the secondary and mould plastics, through actual detection, adopts the utility model provides a waterproof construction's that secondary was moulded plastics and automobile-used equipment can reach IP67 grade.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. The waterproof structure for secondary injection molding is arranged in a plastic shell, and a mold insert formed by primary injection molding is arranged in the plastic shell.

2. The waterproof structure for secondary injection molding according to claim 1, wherein the free end of the protrusion is provided with a bent portion different from a protruding direction of the protrusion.

3. The waterproof structure for secondary injection molding according to claim 2, wherein the protruding portion is perpendicular to a side surface of the mold insert, the bent portion is perpendicular to the protruding portion, and the bent portion extends toward an inner direction of the plastic housing.

4. The waterproof structure for secondary injection molding according to claim 1, wherein a metal connecting member penetrating through the filler is fitted on the mold insert, and the metal connecting member is disposed away from the protrusion.

5. The waterproof structure for two-shot molding according to claim 4, wherein the metal connecting member has at least two bent portions at a portion thereof located in the mold insert.

6. The waterproof structure for secondary injection molding according to claim 5, wherein the number of the turn portions is two, the metal connecting member includes a first connecting section, a second connecting section and a third connecting section which are connected in sequence, the first connecting section is arranged perpendicular to the inner surface of the plastic shell, the second connecting section is arranged perpendicular to the first connecting section, and the third connecting section is arranged perpendicular to the second connecting section.