CN108202136A - The flow passage structure of die casting - Google Patents

Abstract

The invention relates to a flow channel structure, in particular to a flow channel structure of a die-casting mold. The flow channel structure of the die-casting mold of the present invention, the die-casting mold has a flow channel structure, a cavity and an exhaust structure set up in sequence, one end of the cavity has a deep hole, and the vertical cross-sectional area of the part of the flow channel structure is along the The flow direction of the material gradually becomes smaller, the glue inlet of the flow channel structure is in a single flow direction, pointing directly to the position of the cavity, and the width of the exhaust structure is slightly smaller than the width of the cavity. The runner structure of the die-casting mold of the present invention will not become the end of the flow at the deep hole during molding, the gas in the cavity will not be wrapped in the deep hole, and the deep hole on one side of the cavity will no longer generate air, Cold material phenomenon.

Description

Runner structure of die casting mold

【Technical field】

The invention relates to a flow channel structure, in particular to a flow channel structure of a die-casting mold.

【Background technique】

Some metal workpieces are usually formed by die casting, such as the seat belt mandrel of a car.

Please refer to FIG. 1 . FIG. 1 shows a schematic diagram of a runner structure of a die-casting mold in the prior art. One end of the product 10 formed by this die-casting mold has a boss 11, so one end corresponding to the cavity on the mold has a deep hole. Cavity 15, the exhaust structure 13 on one side of the cavity 15, and the deep hole is arranged at one end of the cavity 15.

The current flow channel structure 12 adopts a single-directional glue inlet 14, pointing to the position of the deep hole, so that the position of the deep hole can be filled quickly by using the angle factor, so that the air in the position of the deep hole can be removed in time by the filling speed, and the air in the position of the deep hole can be avoided Wind phenomenon.

However, if the glue position at the head end of the protruding post 11 of the product 10 is too thin, the soup stock in the deep hole position cannot be filled quickly, so that the air in the deep hole cannot be discharged, thereby becoming a flowing die end, making the produced product 10 Cause wind and cold material phenomenon at the position of the deep hole.

In view of this, it is necessary to develop a flow channel structure of a die-casting mold to solve the above-mentioned problems of air trapping and cold material at the position of the deep hole.

【Content of invention】

Therefore, the object of the present invention is to provide a flow channel structure of a die-casting mold, which can solve the problem that the produced product is prone to wind and cold material when the die-casting mold in the prior art has deep holes on the side of the cavity.

In order to achieve the above object, the flow channel structure of the die-casting mold of the present invention has a flow channel structure, a cavity and an exhaust structure set up in sequence, one end of the cavity has a deep hole, and the vertical part of the flow channel structure The straight cross-sectional area gradually becomes smaller along the direction of soup stock flow, the glue inlet of the runner structure is in a single flow direction, pointing straight to the position of the cavity, and the width of the exhaust structure is slightly smaller than the width of the cavity.

Optionally, the runner structure includes a main channel and a branch channel, the main channel is connected to the nozzle of the die-casting mold, one end of the branch channel is connected to the main channel, and the other end is connected to the glue inlet, and the vertical cross-sectional area of the main channel is Gradually get smaller.

Optionally, the width of the main channel changes from wide to narrow along the flow direction.

Optionally, the thickness of the main channel changes from thick to thin along the flow direction.

Compared with the prior art, the runner structure of the die-casting mold of the present invention is designed as a gradual change because the vertical cross-sectional area of the runner structure gradually decreases, which can accelerate the filling, and the glue inlet is designed as Single pointing directly to the position of the cavity increases the cross-sectional area of filling, and the width of the exhaust structure is designed to be slightly smaller than the width of the cavity, which increases the cross-sectional area of exhaust during the filling process. Therefore, the deep hole will not become the end of the flow during molding, the gas in the cavity will not be wrapped in the deep hole, and the deep hole on the side of the cavity will no longer have the phenomenon of air entrainment and cold material.

【Description of drawings】

FIG. 1 is a schematic diagram of a runner structure of a die-casting mold in the prior art.

FIG. 2 is a structural schematic diagram of a preferred embodiment of the runner structure of the die-casting mold of the present invention.

【Detailed ways】

Please refer to FIG. 2 . FIG. 2 is a structural schematic diagram of a preferred embodiment of the runner structure of the die-casting mold of the present invention.

In the flow channel structure of the die-casting mold of the present invention, the product 100 formed by the die-casting mold has a boss 110 at one end, and the die-casting mold has a flow channel structure 120, a cavity 150 and an exhaust structure 130 set up in sequence. The cavity 150 One end of the channel structure 120 has a deep hole forming boss 110, and the local vertical cross-sectional area of the channel structure 120 gradually becomes smaller along the direction of soup flow, and the glue inlet 140 of the channel structure 120 is in a single flow direction, pointing directly to the shape. At the position of the cavity 150 , the width of the exhaust structure 130 is slightly smaller than the width of the cavity 150 .

Wherein, the runner structure 120 includes a main channel 121 and a branch channel 122, the main channel 121 is connected to the nozzle 160 of the die-casting mold, one end of the branch channel 122 is connected to the main channel 121, and the other end is connected to the glue inlet 140, for better To accelerate the filling, the vertical cross-sectional area of the main channel 121 gradually decreases along the direction of soup flow.

Wherein, the width of the main channel 121 is narrowed from wide along the direction of soup flow, so that the vertical cross-sectional area of the main channel 121 is gradually reduced, or the thickness of the main channel 121 is changed from thick to thin along the direction of soup flow, The vertical cross-sectional area of the main flow channel 121 is gradually reduced, or both are changed simultaneously so that the vertical cross-sectional area of the main flow channel 121 is gradually reduced.

As a result, the vertical cross-sectional area of the flow channel structure 120 gradually becomes smaller, that is, it is designed as a gradual change type, which can accelerate the action during the filling process of the soup, and play the role of accelerating the filling, reducing the flow length ratio caused by too long And cause the occurrence of cold material.

The glue inlet 140 is designed to point directly to the position of the cavity 150, which increases the cross-sectional area of filling and can be filled evenly, so that the position of the deep hole and other positions can be filled at the same time, and there will be no problems caused by uneven filling. There is accumulation of cold material in the deep hole.

The width of the exhaust structure 130 is designed to be slightly smaller than the width of the cavity 150, and the cross-sectional area of the exhaust is increased. During the filling process, the temperature of the soup can be effectively maintained and no turn-up will occur, causing air entrainment and entrapment. The phenomenon of wind occurs.

Compared with the prior art, the flow channel structure of the die-casting mold of the present invention does not become the end of the flow at the deep hole during molding, the gas in the cavity 150 will not be wrapped in the deep hole, and the side of the cavity 150 There is no longer any wind or cold material in the deep hole.

Claims (4)

1. A runner structure of a die-casting mold, the die-casting mold has a runner structure, a cavity and an exhaust structure set up in sequence, one end of the cavity has a deep hole, it is characterized in that the vertical part of the runner structure The straight cross-sectional area gradually becomes smaller along the direction of soup stock flow, the glue inlet of the runner structure is in a single flow direction, pointing straight to the position of the cavity, and the width of the exhaust structure is slightly smaller than the width of the cavity. 2. The runner structure of the die-casting mold according to claim 1, wherein the runner structure comprises a main runner and a runner, the main runner is connected to the nozzle of the die-casting mold, and one end of the runner is connected to the main runner, The other end is connected to the glue inlet, and the vertical cross-sectional area of the main channel gradually decreases along the direction of soup flow. 3 . The runner structure of the die-casting mold according to claim 2 , wherein the width of the main runner changes from wide to narrow along the direction of soup flow. 4 . 4. The runner structure of the die-casting mold according to claim 2 or 3, wherein the thickness of the main runner changes from thick to thin along the direction of soup flow.