Car sound insulation cover injection mold

Abstract

The utility model relates to the technical field of automobile parts production, and in particular to a mold for injection molding a soundproof cover for a vehicle. In order to solve the problem that the mounting holes of the existing soundproof covers for vehicles are easy to break during installation, the utility model proposes an injection mold for a soundproof cover for a vehicle, which includes a mold core, and the mold core includes a fixed mold core and a movable mold core that are buckled together. The model insert on the fixed mold core extends into the movable mold cavity on the movable mold core, and the model insert and the movable mold cavity are matched to form a mold cavity; an overflow groove is provided in the mold cavity, and the overflow groove is close to the injection gate. In this way, an overflow groove is provided in the mold cavity. During the injection molding process, after the injection molding rubber filled in the mold cavity fills the mold cavity, the excess injection molding rubber can overflow into the overflow groove, thereby avoiding the occurrence of weld marks at the mounting holes of the soundproof cover for a vehicle formed by injection molding, and further effectively solving the problem of the mounting holes of the soundproof cover for a vehicle being broken due to the defects of weld marks.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts production, in particular to a mold for injection molding a sound insulation cover for a vehicle. Background Art

[0002] With the development of social economy and technology, automobile configurations are becoming increasingly rich. Vehicle soundproofing covers are one of the important parts of automobiles, and are widely used in engine compartments and trunks. They have the functions of sound insulation, dust prevention, water seepage prevention and shock absorption. They are used to eliminate engine noise from combustion, gears and valves, maintain and protect the microenvironment in the car, and protect the electromechanical devices and other items in the car.

[0003] Existing vehicle sound insulation covers such as Figure 1 As shown, the vehicle soundproof cover is installed and fixed through the mounting hole 01. However, since the mounting hole 01 is far away from the gate position 02, and the thickness of the material at the edge of the mounting hole is 4.5mm, when the vehicle soundproof cover is formed by injection molding using the existing injection mold, after the mold is closed, the injection molding rubber is prone to form a weld mark at the mounting hole 01 in the process of filling the mold cavity in the injection mold; since the cover shell of the existing vehicle soundproof cover is relatively thin, in order to meet the injection molding requirements of the existing vehicle soundproof cover, the mold cavity depth in the injection mold is relatively small, and during the injection molding process, the injection molding rubber is difficult to fill and is prone to material shortage, resulting in a low appearance qualification rate of the vehicle soundproof cover formed by injection molding. It can be seen that when the existing vehicle soundproof cover is formed by injection molding, weld marks are prone to appear at the mounting hole 01, and it is easy to break during installation; the injection molding rubber is difficult to fill, and the appearance qualification rate is low. Utility Model Content

[0004] In order to solve the problem that the mounting holes of the existing vehicle sound insulation covers are easy to break during installation, the utility model proposes an injection mold for a vehicle sound insulation cover, the injection mold for the vehicle sound insulation cover includes a mold core, the mold core includes a fixed mold core and a movable mold core that are buckled, the model insert on the fixed mold core extends into the movable mold cavity on the movable mold core, and the model insert and the movable mold cavity are matched to form a mold cavity; an overflow groove is provided in the mold cavity, and the overflow groove is close to the injection gate. In this way, an overflow groove is provided in the mold cavity, and during the injection molding process, after the injection molding rubber filled in the mold cavity fills the mold cavity, the excess injection molding rubber can overflow into the overflow groove, thereby avoiding the occurrence of weld marks at the mounting holes of the vehicle sound insulation cover formed by injection molding, and further effectively solving the problem of the mounting holes of the vehicle sound insulation cover being broken due to the defects of weld marks.

[0005] Preferably, the overflow groove is close to the end of the mold cavity. In this way, the overflow bag formed by injection molding is close to the end of the vehicle sound insulation cover, which is convenient for production or installation personnel to manually remove the overflow bag. Furthermore, the inner diameter of the overflow groove is 10mm and the depth is 15mm. In this way, the inner diameter of the overflow groove is 10mm, the depth is 15mm, and the volume is relatively large. Before the injection molding rubber fully fills the overflow groove, the injection molding rubber can fully fill the mold cavity, thereby improving the qualified rate of eliminating weld marks.

[0006] Preferably, the top surface of the mold insert is provided with a top surface rib groove, and the side wall of the mold insert is provided with a side wall rib groove. In this way, the top surface rib groove is provided on the top surface of the mold insert, and the side wall rib groove is provided on the side wall, so that reinforcing ribs can be formed on the inner bottom and side wall of the vehicle sound insulation cover formed by injection molding, thereby improving the cover body strength of the vehicle sound insulation cover formed by injection molding. Furthermore, three rows of the top surface rib grooves are provided on the top surface of the mold insert, and a glue feed point is provided in the middle of the top surface rib groove near the injection molding gate. In this way, adding multiple glue feed points on the top surface of the mold insert can increase the glue feed at the top of the mold insert during the injection molding process, thereby solving the problem of low appearance qualification rate of the vehicle sound insulation cover formed by injection molding due to insufficient injection molding glue filling at the top of the mold insert. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structure of an existing vehicle sound insulation cover;

[0008] Figure 2 It is a structural schematic diagram of a vehicle sound insulation cover formed by injection molding using the vehicle sound insulation cover injection mold of the utility model;

[0009] Figure 3 The utility model is a structural schematic diagram of the fixed mold core in the injection mold of the vehicle sound insulation cover. DETAILED DESCRIPTION

[0010] Next, combine Figure 2 and 3 , the injection mold of the vehicle sound insulation cover of the utility model is described in detail.

[0011] like Figure 2As shown, the injection mold for a vehicle sound insulation cover of the utility model includes a mold core, and the mold core includes a fixed mold core 1 and a movable mold core (not shown in the figure) that are fastened together. The model insert 11 on the fixed mold core 1 extends into the movable mold cavity on the movable mold core, and the model insert 11 and the movable mold cavity are matched to form a mold cavity; an overflow groove 12 is provided in the mold cavity, and the overflow groove 12 is close to the injection gate 13. In this way, an overflow groove 12 is provided in the mold cavity, and during the injection molding process, after the injection molding rubber filled in the mold cavity fills the mold cavity, the excess injection molding rubber can overflow into the overflow groove 12, thereby avoiding the occurrence of weld marks at the mounting holes of the vehicle sound insulation cover formed by injection molding, and further effectively solving the problem of the mounting holes of the vehicle sound insulation cover being broken due to the defects of weld marks. Preferably, the overflow groove 12 is close to the end of the mold cavity. In this way, Figure 3 As shown, the overflow bag 21 formed by injection molding is close to the end of the vehicle sound insulation cover 2, which is convenient for production or installation personnel to manually remove the overflow bag 21. Preferably, the inner diameter of the overflow groove 12 is 10mm and the depth is 15mm. In this way, the inner diameter of the overflow groove 12 is 10mm and the depth is 15mm, and the volume is relatively large. Before the injection molding rubber fully fills the overflow groove 12, the injection molding rubber can fully fill the mold cavity, thereby improving the qualified rate of eliminating weld marks. Preferably, a top surface rib groove 111 is provided on the top surface of the model insert 11, and a side wall rib groove 112 is provided on the side wall of the model insert. In this way, the top surface rib groove 111 is provided on the top surface of the model insert 11, and the side wall rib groove 112 is provided on the side wall, and the reinforcing ribs formed on the inner bottom and side wall of the vehicle sound insulation cover formed by injection molding can improve the cover body strength of the vehicle sound insulation cover formed by injection molding. Preferably, three rows of top rib grooves 111 are provided on the top surface of the model insert 11, and a glue feeding point 113 is provided in the middle of the top rib groove near the injection gate 13. In this way, by adding a plurality of glue feeding points 113 on the top surface of the model insert 11, the glue feeding at the top of the model insert 11 during the injection molding process can be increased, thereby solving the problem of low appearance qualification rate of the vehicle sound insulation cover formed by injection molding due to insufficient injection molding glue filling at the top of the model insert 11.

Claims

1. A vehicle sound insulation cover injection mold, characterized in that: The injection mold for the vehicle sound insulation cover includes a mold core, which includes a fixed mold core and a movable mold core that are snapped together. The model insert on the fixed mold core extends into the movable mold cavity on the movable mold core, and the model insert and the movable mold cavity are matched to form a mold cavity; an overflow groove is provided in the mold cavity, and the overflow groove is close to the injection gate.

2. The vehicle sound insulation cover injection mold according to claim 1, characterized in that: The overflow groove is close to the end of the mold cavity.

3. The vehicle sound insulation cover injection mold according to claim 1 or 2, characterized in that: The inner diameter of the overflow trough is 10 mm and the depth is 15 mm.

4. The vehicle sound insulation cover injection mold according to claim 3, characterized in that: The top surface of the model insert is provided with a top surface rib groove, and the side wall of the model insert is provided with a side wall rib groove.

5. The vehicle soundproof cover injection mold according to claim 4, characterized in that: Three rows of top rib grooves are arranged on the top surface of the model insert, and a glue feeding point is arranged in the middle of the top rib groove close to the injection gate.

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