CN203391238U - A mold exhaust structure - Google Patents

Abstract

A mold exhaust structure is installed in a mold core, and the exhaust structure includes a base and a breathable steel that fits and covers the surface of the base; a groove is provided on the surface of the base that contacts the breathable steel, and a cooling water channel and an air intake and exhaust pipe that communicates with the groove are provided inside the base. The mold exhaust structure provided by the utility model breaks the limitations of the existing exhaust insert exhaust, solves the weld line problem of the product, and improves the product yield.

Description

A mold exhaust structure

technical field

The utility model relates to a mold exhaust structure. the

Background technique

For products with high appearance requirements, such as mobile phone casings, because there is air in the mold cavity, it is necessary to make exhaust inserts to exhaust the mold. The existing exhaust inserts are in the form of single exhaust, and the exhaust is not sufficient. It is easy to cause residual air in the cavity, produce weld lines, and affect the appearance of the product. the

Contents of the invention

In order to overcome the deficiencies and existing problems of the prior art, the utility model provides a mold exhaust structure which can effectively improve the welding line problem of the product and improve the yield rate of the product. the

The utility model is achieved through the following technical solutions:

A mold exhaust structure, installed in the mold core, the exhaust structure includes a base and a breathable steel that fits and covers the surface of the base; grooves are opened on the surface of the base that is in contact with the breathable steel, The inside of the base is provided with a cooling water channel and suction and exhaust pipes communicating with the groove.

The groove is serpentine or S-shaped. the

The surface of the base that is in contact with the air-permeable steel is provided with clamping grooves around, and the air-permeable steel is provided with protrusions engaged with the clamping grooves. the

The clamping part of the exhaust structure is provided with a screw hole, and the screw hole extends from the bottom surface of the base to the inside of the air-permeable steel, and is locked by screws. the

The exhaust structure described in the utility model is installed in the mold core, and the air-permeable steel is not only used as an insert for plastic parts, but also can discharge the gas in the cavity; the surface in contact with the air-permeable steel on the base is provided with serpentine or The groove is connected with the suction and exhaust pipes, and the air in the cavity is sucked out through the suction and exhaust pipes before injection molding, so that the cavity can be in a negative pressure state, and the product is prevented from forming a weld line; after the injection molding is completed, the product is ejected, Blow air through the suction and exhaust pipes to blow away the impurities in the gaps of the breathable steel and enter the next suction and exhaust cycle; the serpentine or S-shaped groove increases the ventilation area of the breathable steel, so that the gas from the cavity can be discharged more quickly. And it is more convenient to blow out the impurities in the breathable steel after the product is ejected. the

Description of drawings

Fig. 1 is a schematic diagram of the structure of the utility model base;

Fig. 2 is a schematic diagram of the overall structure of the utility model.

In the figure: 1-base, 2-breathable steel, 3-suction and exhaust pipes, 4-cooling water channel, 5-groove, 6-clip slot, 7-protrusion, 8-screw hole. the

Detailed ways

In order to facilitate the understanding of those skilled in the art, the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a mold exhaust structure is inlaid and installed in the mold core. The exhaust structure includes a base 1 and a breathable steel 2 that is attached to the surface of the base 1. The surface of the breathable steel 2 is connected to the surface of the base 1. The mold cavity is flush; the surface of the base 1 in contact with the air-permeable steel 2 is provided with a groove 5 , and the inside of the base 1 is provided with a cooling water channel 4 and a suction and exhaust pipe 3 communicating with the groove 5 . Before injection molding, the air in the cavity is sucked out through the suction and exhaust pipeline 3, so that the cavity forms a negative pressure state, and the product is prevented from forming a weld line; The impurities in the gap are blown away and enter the next suction and exhaust cycle. The groove 5 is serpentine or S-shaped, and the serpentine or S-shaped groove 5 increases the ventilation area of the air-permeable steel 2, so that the gas in the cavity can be discharged more quickly, and it is more convenient to blow out the air-permeable steel after the product is ejected. Internal impurities. the

The surface of the base 1 that is in contact with the air-permeable steel 2 is provided with a clamping groove 6 around, and the breathable steel 2 is provided with a protrusion 7 that is engaged with the clamping groove 6, and the clamping groove 6 and the protrusion 7 are positioned in cooperation to ensure precision. the

The clamping part of the exhaust structure is provided with a screw hole 8, and the screw hole 8 extends from the bottom surface of the base 1 to the inside of the air-permeable steel 2, and is locked by screws. the

The contents mentioned in the above embodiments are not limitations of the present utility model, any obvious replacements are within the protection scope of the present utility model without departing from the inventive concept of the present utility model. the

Claims (4)

1. a die venting structure, is installed in die, it is characterized in that: described exhaust structure comprises that pedestal (1) and laminating are covered in the lip-deep ventilative steel of pedestal (1) (2); The upper surface contacting with ventilative steel (2) of described pedestal (1) offers groove (5), the suction and discharge pipeline (3) that pedestal (1) inside is provided with cooling water channel (4) and communicates with groove (5).

2. die venting structure according to claim 1, is characterized in that: described groove (5) is snakelike or S shape.

3. die venting structure according to claim 2, is characterized in that: the upper surperficial surrounding contacting with ventilative steel (2) of described pedestal (1) is provided with buckling groove (6), and ventilative steel (2) is provided with the projection (7) with buckling groove (6) phase clamping.

4. die venting structure according to claim 3, is characterized in that: the wedging position of described exhaust structure is provided with screw (8), and described screw (8) extends to ventilative steel (2) inside from pedestal (1) bottom surface, by screw, is locked.

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