Mold and method for manufacturing automotive sound-insulation pads

Abstract

The invention relates to a mold and method for manufacturing automotive sound-insulation pads. The mold comprises a fixed mold and a movable mold which are opposite to each other, wherein the fixed mold comprises a fixed mold body; the fixed mold body is provided with a first molded surface which faces the movable mold; a sound-insulation layer which is placed on the first molded surface can be formed in a vacuum adsorption manner; the movable mold comprises a movable mold body, a pressing plate and a trimming cutter; the pressing plate is movably arranged on the movable mold body; the trimming cutter is fixedly arranged on the movable mold body; in the direction, which is opposite to the movable mold, of the fixed mold, a region covered by the projection of the first molded surface to the movable mold is a second molded surface; the trimming cutter is positioned on the periphery of the second molded surface; after being heated, the trimming cutter is used for trimming the edge of a sound-insulation pad after the sound-insulation pad is subjected to mould pressing to form a sound-insulation pad with the required profile. In a process of manufacturing sound-insulation pads by using the mold, the circumstance that sound-absorbing cotton is broken due to incomplete filling and poor drawability of the sound-absorbing cotton in the whole process is avoided.

Description

Technical field

[0001] The invention relates to the technical field of molds, in particular to a mold and a method for manufacturing automobile soundproof pads. Background technique

[0002] The sound insulation pad of the car front wall inner panel is installed on the inner side of the sheet metal between the engine compartment and the passenger compartment, and is an important part to isolate the noise of the engine compartment. Sound insulation pads are usually composed of two functional layers: sound insulation layer and sound absorption layer. The sound insulation layer material generally uses high-density EVA or other hard cotton felt materials, while the sound-absorbing layer material uses low-density foamed or loose sound-absorbing cotton. Among the different design combinations of the two layers of materials, the combination of "EVA + sound-absorbing cotton" has more excellent acoustic performance, especially in dealing with high-frequency whistling of hybrid or pure el...

Examples

Embodiment 1

[0050] The embodiment of the present invention provides a mold for manufacturing automobile sound insulation pads, reference figure 1 , The mold for manufacturing automobile sound-insulating pads of this embodiment includes: a fixed mold A and a movable mold B that are relatively disposed; the mold has an inner cavity that is the same as the part to be molded, and the material is placed in the cavity during molding. After a period of holding pressure, the mold is separated from the parting line position and the pressed parts are taken out; at this time, one side of the mold is fixed, called a fixed mold, and the other side moves away from the fixed mold when the mold is opened, called a movable mold.

[0051] In this embodiment, the fixed mold A includes a fixed mold body 2, which is fixed on the fixed mold frame 1 by bolts (not shown in the figure), and the fixed mold body 2 does not move during the process of manufacturing the sound insulation pad. The fixed mold body 2 has a fi...

Embodiment 2

[0079] The embodiment of the present invention provides a method for manufacturing an automobile sound insulation pad, which includes: vacuum-adsorbing and molding the sound insulation layer; placing a sound absorption layer on the molded sound insulation layer; molding the sound absorption layer and the sound insulation layer to form the sound insulation pad; The sound insulation pad is trimmed, and the sound insulation pad is punched after or when the sound insulation pad is formed into a desired shape.

[0080] This embodiment will describe in detail the processing process of the sound insulation pad with the combination of "EVA + sound-absorbing cotton".

[0081] The first step, such as figure 2 Show and combine figure 1 , Send the heated EVA sheet 16 into the mold and make it fit naturally along the upper surface of the first profile 2a;

[0082] The second step, such as image 3 Show and combine figure 1 , Turn on the vacuum pump to vacuum the air chamber 3. At the same time, ...

Technical field

[0001] The invention relates to the technical field of molds, in particular to a mold and a method for manufacturing automobile soundproof pads. Background technique

[0002] The sound insulation pad of the car front wall inner panel is installed on the inner side of the sheet metal between the engine compartment and the passenger compartment, and is an important part to isolate the noise of the engine compartment. Sound insulation pads are usually composed of two functional layers: sound insulation layer and sound absorption layer. The sound insulation layer material generally uses high-density EVA or other hard cotton felt materials, while the sound-absorbing layer material uses low-density foamed or loose sound-absorbing cotton. Among the different design combinations of the two layers of materials, the combination of "EVA + sound-absorbing cotton" has more excellent acoustic performance, especially in dealing with high-frequency whistling of hybrid or pure el...

Examples

Embodiment 1

[0050] The embodiment of the present invention provides a mold for manufacturing automobile sound insulation pads, reference figure 1 , The mold for manufacturing automobile sound-insulating pads of this embodiment includes: a fixed mold A and a movable mold B that are relatively disposed; the mold has an inner cavity that is the same as the part to be molded, and the material is placed in the cavity during molding. After a period of holding pressure, the mold is separated from the parting line position and the pressed parts are taken out; at this time, one side of the mold is fixed, called a fixed mold, and the other side moves away from the fixed mold when the mold is opened, called a movable mold.

[0051] In this embodiment, the fixed mold A includes a fixed mold body 2, which is fixed on the fixed mold frame 1 by bolts (not shown in the figure), and the fixed mold body 2 does not move during the process of manufacturing the sound insulation pad. The fixed mold body 2 has a fi...

Embodiment 2

[0079] The embodiment of the present invention provides a method for manufacturing an automobile sound insulation pad, which includes: vacuum-adsorbing and molding the sound insulation layer; placing a sound absorption layer on the molded sound insulation layer; molding the sound absorption layer and the sound insulation layer to form the sound insulation pad; The sound insulation pad is trimmed, and the sound insulation pad is punched after or when the sound insulation pad is formed into a desired shape.

[0080] This embodiment will describe in detail the processing process of the sound insulation pad with the combination of "EVA + sound-absorbing cotton".

[0081] The first step, such as figure 2 Show and combine figure 1 , Send the heated EVA sheet 16 into the mold and make it fit naturally along the upper surface of the first profile 2a;

[0082] The second step, such as image 3 Show and combine figure 1 , Turn on the vacuum pump to vacuum the air chamber 3. At the same time, ...

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