CN210190429U - Stereo set part injection mold - Google Patents

Abstract

The utility model relates to a stereo set part injection mold, last mould and bed die including mutual lock, the inside mould cavity that is formed with of bed die, go up the mould bottom and seted up redundant chamber and the passageway of moulding plastics, redundant chamber with mould cavity intercommunication, the passageway of moulding plastics with mould cavity intercommunication, it moulds plastics the mouth to go up the mould lateral wall, mould plastics the mouth with the passageway intercommunication of moulding plastics, the bottom edge of going up the mould has seted up the broach groove, redundant chamber and the passageway three of moulding plastics are arranged along same straight line, the broach groove cooperation has the cutting knife. Through the excessive injection of the melt, redundant blocks are formed in a redundant cavity and an injection molding channel of the upper die, impurities and air bubbles float up to the redundant blocks through physical action in the cooling process, and the redundant blocks are cut off when the die is opened, so that the high-quality injection molding part can be obtained.

Description

Stereo set part injection mold

Technical Field

The utility model relates to an injection moulding field especially relates to stereo set part injection mold.

Background

Audio is commonly used in home entertainment, outdoor activities, vehicle equipment, or personal equipment. The shape, size and quality grade of the material can be changed according to different applicable environments. It is known that the quality of music equipment and audio components greatly affects the tone quality and quality, and thus the processing requirements of audio components are relatively high.

The plastic process is developed day by day, and the parts of stereo set also adopt injection molding process production, can practice thrift the cost simultaneously, and the part of moulding plastics takes advantage on characteristics such as local tone. The challenge is the delicate injection molding part fabrication process. According to the design and the size demand of different stereo sets, more and more audio components with exquisite size and complex structure are obtained by processing through an injection molding process, and the injection molding components processed through the traditional injection molding process have defects. Because the mold is small and the requirement on the dimensional precision is high, the problems of bubbles and impurities which are common in injection molding are particularly obvious in the injection molding parts.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model adopts the following technical scheme: the utility model provides a stereo set part injection mold, includes the last mould and the bed die of mutual lock, the inside mould chamber that is formed with of bed die, go up the mould bottom and seted up redundant chamber and the passageway of moulding plastics, redundant chamber with mould chamber intercommunication, the passageway of moulding plastics with mould chamber intercommunication, go up the mould lateral wall and seted up the mouth of moulding plastics, the mouth of moulding plastics with the passageway intercommunication of moulding plastics, the bottom edge of going up the mould has seted up the broach groove, redundant chamber and the passageway three of moulding plastics are arranged along same straight line, broach groove cooperation has the cutting knife.

Further, the length of the cutting knife is greater than or equal to the length of the die cavity.

Furthermore, a boosting plate is arranged at the tail end of the cutting knife.

Furthermore, the middle section of the injection molding channel expands outwards to form a redundant space.

Furthermore, the redundant cavity is arranged in an inverted boss shape.

The utility model discloses a theory of operation does: the problem of air bubbles in the injection-molded part is improved by providing redundant cavities in the mold and by over-injecting during injection molding. The injection molding opening of the mold is designed on the side wall of the upper mold with a higher relative position, and the mold cavity is positioned in the lower mold with a lower relative position, so that high-low fall is generated. The redundant cavity and the injection channel are designed at the bottom of the upper mold. When the upper die is buckled with the lower die, the redundant cavity is communicated with the die cavity; the injection molding channel is communicated with the mold cavity. And after the injection molding gun head is inserted into the injection molding opening, molten plastic is injected, the melt flows through the injection molding channel from top to bottom and fills the mold cavity, the mold cavity overflows through excessive injection, and the overflowing part of the melt flows into the redundant cavity and the injection molding channel. During cooling, the melt is at rest, and the bubbles and lighter floating dust impurities naturally float up into the redundant cavity and the injection channel. After cooling is completed, a cutting knife is inserted between the upper die and the lower die, and the injection molding piece formed by attaching the cutting knife cuts off the waste material part with impurities and bubbles, which is formed by solidification in the redundant cavity and the injection molding channel. The injection molded parts are finished with high quality, precise dimensions, no air bubbles and no impurities. In the design process, in order to reduce the resistance received by the cutting knife, the design of the joint of the redundant cavity communicated with the die cavity is relatively narrow, and the cutting is easy. The same treatment is carried out at the interface of the injection molding channel and the mold cavity. However, considering that the design needs to store the excessive injected melt in the redundant cavity and the injection channel, the redundant cavity is designed into an inverted boss shape and has a structure with a wide upper part and a narrow lower part. The injection molding channel is designed to be a structure with a wide middle part and narrow two ends. And finally, in order to easily insert the cutting knife, a boosting plate is additionally arranged at the tail part of the cutting knife.

The utility model has the advantages that: through the excessive injection of the melt, redundant blocks are formed in a redundant cavity and an injection molding channel of the upper die, impurities and air bubbles float up to the redundant blocks through physical action in the cooling process, and the redundant blocks are cut off when the die is opened, so that the high-quality injection molding part can be obtained.

Drawings

The figures further illustrate the invention, but the embodiments in the figures do not constitute any limitation of the invention.

Fig. 1 is a schematic structural view of an injection mold for a sound component according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1, an embodiment of the utility model provides a sound part injection mold, last mould 1 and bed die 2 including mutual lock, 2 inside are formed with mould chamber 21 of bed die, go up 1 bottoms of mould and seted up redundant chamber 11 and the passageway 12 of moulding plastics, redundant chamber 11 with mould chamber 21 intercommunication, the passageway 12 of moulding plastics with mould chamber 21 intercommunication, go up 1 lateral wall of mould and seted up the mouth of moulding plastics 13, the mouth of moulding plastics 13 with the passageway 12 intercommunication of moulding plastics, the bottom edge of going up mould 1 has seted up the sword groove 14, redundant chamber 11 and the passageway 12 three of moulding plastics are arranged along same straight line, the cooperation of sword groove 14 has cutting knife 3.

Further, the length of the cutting blade 3 is greater than or equal to the length of the die cavity 21.

Further, the tail end of the cutting knife 3 is provided with a boosting plate 31.

Further, the middle section of the injection channel 12 is expanded outwards to form a redundant space.

Furthermore, the redundant cavity 11 is arranged in an inverted boss shape.

The problem of air bubbles in the injection-molded part is improved by providing a redundant cavity 11 in the mold and by over-injecting during injection. The injection opening 13 of the mold is designed in the side wall of the upper mold 1 which is relatively high, while the mold cavity 21 is located in the lower mold 2 which is relatively low, creating a height drop. The redundant chamber 11 and the injection channel 12 are designed at the bottom of the upper mold 1. When the upper die 1 is buckled with the lower die 2, the redundant cavity 11 is communicated with the die cavity 21; the injection channel 12 communicates with the mold cavity 21. And after the injection molding gun head is inserted into the injection molding opening 13, molten plastic is injected, the melt flows through the injection molding channel 12 from top to bottom and fills the mold cavity 21, the excessive injection causes the mold cavity 21 to overflow, and the overflow part flows into the redundant cavity 11 and the injection molding channel 12. During cooling, the melt is at rest, while the gas bubbles and the lighter float dust impurities naturally float upwards into the redundant chamber 11 and the injection channel 12. After cooling, the cutting knife 3 is inserted between the upper die 1 and the lower die 2, and the injection molding piece formed by attaching the cutting knife 3 cuts off the waste material part with impurities and bubbles which is solidified and formed in the redundant cavity 11 and the injection molding channel 12. The injection molded parts are finished with high quality, precise dimensions, no air bubbles and no impurities. In order to reduce the resistance received by the cutting blade 3 during the design process, the interface connecting the redundant cavity 11 to the die cavity 21 is designed to be relatively narrow and easy to cut. The same is done at the interface of the injection channel 12 with the mold cavity 21. However, in consideration of the design that requires storing the excessively injected melt in the redundant cavity 11 and the injection channel 12, the redundant cavity 11 is designed in an inverted boss shape with a wide top and a narrow bottom. The injection channel 12 is designed to be wide in the middle and narrow at two ends. Finally, in order to easily insert the cutting knife 3, a boosting plate 31 is additionally arranged at the tail part of the cutting knife 3.

Redundant blocks are formed in the redundant cavity 11 and the injection channel 12 of the upper die 1 through excessive injection of the melt, impurities and bubbles float up to the redundant blocks through physical action in the cooling process, and the redundant blocks are cut off during die opening to obtain high-quality injection parts.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (5)

1. The utility model provides a stereo set part injection mold which characterized in that: the novel injection molding device comprises an upper mold and a lower mold which are mutually buckled, wherein a mold cavity is formed inside the lower mold, a redundant cavity and an injection molding channel are formed in the bottom of the upper mold, the redundant cavity is communicated with the mold cavity, the injection molding channel is communicated with the mold cavity, an injection molding port is formed in the side wall of the upper mold, the injection molding port is communicated with the injection molding channel, a cutter inserting groove is formed in the edge of the bottom of the upper mold, the cutter inserting groove, the redundant cavity and the injection molding channel are arranged along the same straight line, and a cutting knife is matched with the cutter inserting groove.

2. The audio component injection mold of claim 1, wherein: the length of the cutting knife is greater than or equal to the length of the die cavity.

3. The audio component injection mold of claim 1, wherein: and a boosting plate is arranged at the tail end of the cutting knife.

4. The audio component injection mold of claim 1, wherein: and the middle section of the injection molding channel expands outwards to form a redundant space.

5. The audio component injection mold of claim 1, wherein: the redundant cavity is arranged in an inverted boss shape.

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