Plane exhaust structure of die-casting die

Abstract

The utility model relates to a die-casting die plane exhaust structure which structurally comprises an outer die, an inner die and a cylinder, a forming cavity is defined by the outer die and the inner die, the forming cavity is in a long pipe shape with a plane top, a long hole with the inner diameter smaller than the outer diameter of the forming cavity is coaxially formed above the forming cavity, the cylinder is arranged in the long hole, and the bottom end of the cylinder extends to the top end of the forming cavity. A deslagging step is arranged at the bottom end of the cylinder. And an exhaust gap is formed between the column body above the deslagging step and the long hole. And a first-stage slag collecting step and a second-stage slag collecting step of which the inner diameters are sequentially increased are arranged on the inner side of the long hole above the exhaust gap. The die-casting die has the advantages that the structural design is reasonable, die-casting slag and bubbles of a long-pipe-shaped product structure with the top end being a plane can be effectively removed, the shrinkage cavity and air leakage conditions are reduced, and the die-casting quality can be effectively improved.

Description

Technical Field

[0001] This utility model relates to a planar venting structure for die-casting molds, specifically a planar venting structure for die-casting molds of long tubular products. Background Technology

[0002] In die casting production, for long tubular structures with flat tops, existing technologies generally use ordinary venting and slag removal structures. However, due to the long and thin structure of the product, there are gas shrinkage cavities and air leakage during die casting, resulting in poor overall and end forming quality of the product structure and affecting the stability of product quality. Utility Model Content

[0003] This utility model proposes a planar venting structure for die-casting molds, which aims to overcome the above-mentioned shortcomings of the existing technology, reduce gas shrinkage cavities and air leakage, and improve product quality.

[0004] The technical solution of this utility model is a planar venting structure for a die-casting mold. The structure includes an outer mold, an inner mold, and a column. The outer mold and inner mold form a molding cavity, which is an elongated tube with a flat top. An elongated hole with an inner diameter smaller than the outer diameter of the molding cavity is coaxially provided above the molding cavity. The column is placed inside the elongated hole, with its bottom end extending to the top of the molding cavity. A slag-removing step is provided at the bottom end of the column. During die casting, the product body is die-cast within the molding cavity. Die-casting slag and air bubbles move upwards, effectively removing die-casting slag and air bubbles, reducing shrinkage cavities and air leakage, and improving die-casting quality.

[0005] Preferably, the gap between the column above the slag discharge step and the elongated hole is the venting gap.

[0006] Preferably, the inner side of the elongated hole above the exhaust gap is provided with a first-stage slag collection step and a second-stage slag collection step with successively increasing inner diameters.

[0007] The advantages of this utility model are: the reasonable structural design can effectively eliminate die casting slag and air bubbles in long tubular products with a flat top, reduce shrinkage cavities and air leakage, and effectively improve die casting quality. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the planar venting structure of the die-casting mold of this utility model.

[0009] In the figure, 1 is the outer mold, 11 is the elongated hole, 111 is the venting gap, 112 is the first-level slag collection step, 113 is the second-level slag collection step, 2 is the inner mold, 21 is the forming cavity, 3 is the column, 31 is the slag discharge step, 4 is the product body, 41 is the end plane, and 42 is the annular slag discharge section. Detailed Implementation

[0010] The present invention will be further described in detail below with reference to embodiments and specific implementation methods.

[0011] like Figure 1 As shown, a planar venting structure for a die-casting mold includes an outer mold 1, an inner mold 2, and a column 3. The outer mold 1 and the inner mold 2 form a molding cavity 21, which is a long tube with a top plane. An elongated hole 11 with an inner diameter smaller than the outer diameter of the molding cavity 21 is coaxially provided above the molding cavity 21. The column 3 is provided inside the elongated hole 11, and the bottom end of the column 3 extends to the top end of the molding cavity 21. A slag discharge step 31 is provided at the bottom end of the column 3. The space between the column 3 above the slag discharge step 31 and the elongated hole 11 is a venting gap 111. The inner side of the elongated hole 11 above the venting gap 111 is provided with a first-stage slag collection step 112 and a second-stage slag collection step 113 with successively increasing inner diameters.

[0012] According to the above structure, during die casting, the product body 4 is die cast in the molding cavity 21. The die casting slag and bubbles move upward and pass through the slag discharge area formed by the slag discharge step 3 and the elongated hole 11, the venting gap 111, the primary slag collection area formed by the primary slag collection step 112 and the elongated hole 11, and the secondary slag collection area formed by the secondary slag collection step 113 and the elongated hole 11. The end plane 41 at the top of the product body 4 forms an annular slag discharge part 42, which can effectively drive away the die casting slag and bubbles. The die casting production of the product can be achieved by machining off the annular slag discharge part 42.

[0013] All of the components described above are existing technologies, and those skilled in the art can use any model and existing design that can achieve their corresponding functions.

[0014] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A die casting mold planar exhaust structure characterized by, It includes outer mold (1), inner mold (2) and cylinder (3), outer mold (1) and inner mold (2) form forming cavity (21), forming cavity is long tube shape with top plane, long hole (11) with smaller inner diameter than the outer diameter of forming cavity (21) is coaxially arranged above forming cavity (21), cylinder (3) is arranged in long hole (11), cylinder (3) bottom end extends to the top end of forming cavity (21), and cylinder (3) bottom end is provided with deslagging step (31).

2. The flat vent structure of a die casting mold according to claim 1, wherein The cylinder (3) above the deslagging step (31) and the long hole (11) are an exhaust gap (111).

3. A planar vent structure for a die casting mold as defined in claim 2, wherein The inner side of the long hole (11) above the exhaust gap (111) is provided with a first-stage slag collecting step (112) and a second-stage slag collecting step (113) with increasing inner diameters.

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