Die-casting die for automobile part production

Abstract

The utility model belongs to the technical field of die-casting dies, and relates to a die-casting die for producing automobile parts, which comprises a pouring gate, a main pouring gate is connected to the middle of the pouring gate, two groups of branch pouring gates are mounted at one end, far away from the pouring gate, of the main pouring gate, and inner pouring gates are arranged at one ends of the two branch pouring gates. The ends, close to the inner pouring gate, of the two branch pouring gates are both connected with forming cavities, exhaust modules are arranged on the top faces of the forming cavities, and overflow discharging modules are arranged in the middles of the forming cavities. By changing the positions of the main pouring gate and the branch pouring gates, the feeding direction of a metal solution can be changed, so that the metal solution can quickly fill a processing area, the flow state of the solution is smoother and more stable, the risk of forming a wrapping roll in the solution is greatly reduced, the air hole defect of a product is reduced, and the qualified rate of the product is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to die casting die technical field relates to a die casting die for automobile parts production. BACKGROUND

[0002] Die casting die is the core tool of metal liquid under high pressure high speed filling and solidification forming, directly influences the precision, performance, cost and production efficiency of die casting, and plays an indispensable important role in the production process of automobile parts.

[0003] The traditional die casting die's gating system generally adopts the center runner design, when the high temperature metal liquid impacts the center of the cavity at high speed, the radial vortex ring effect is easily caused, the residual air in the cavity, the demolding agent volatile gas and the coating decomposition gas are rolled into the metal liquid inside to form the turbulent bubble group, especially when the filter cover and other cylindrical sealing performance parts in the automobile parts need to be die cast, therefore, the similar products require high machining surface porosity, thus under the influence of the center runner design, the product porosity defect is easily caused, and the product qualified rate is reduced. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that the traditional die casting die's gating system generally adopts the center runner design, when the high temperature metal liquid impacts the center of the cavity at high speed, the radial vortex ring effect is easily caused, the residual air in the cavity, the demolding agent volatile gas and the coating decomposition gas are rolled into the metal liquid inside to form the turbulent bubble group, especially when the filter cover and other cylindrical sealing performance parts in the automobile parts need to be die cast, therefore, the similar products require high machining surface porosity, thus under the influence of the center runner design, the product porosity defect is easily caused, and the product qualified rate is reduced.

[0005] The utility model contents die casting die for automobile parts production, including injection gate, the main runner is connected in the injection gate middle part, two groups of sub-runners are installed to the main runner away from the injection gate one end, the inner gate is arranged in one end of two sub-runners, the forming cavity is connected in one end of two sub-runners close to the inner gate, the exhaust module group is set up in the forming cavity top surface, the overflow module group is set up in the forming cavity middle part.

[0006] The exhaust module group includes multiple main exhaust pipes, gas collecting bag and sub-exhaust pipe, one end of the main exhaust pipe is connected to the forming cavity top surface, the gas collecting bag is connected to one end of the main exhaust pipe away from the forming cavity, and the sub-exhaust pipe is installed on the other end of the gas collecting bag.

[0007] The overflow module group includes multiple main overflow pipes and slag collecting bag, and the main overflow pipe is installed in the middle part of the forming cavity, and the slag collecting bag is installed on one end of the main overflow pipe away from the forming cavity.

[0008] The overflow module further comprises a sub-overflow pipeline, one end of the sub-overflow pipeline is connected to the middle part of the slag collecting ladle, and the end of the sub-overflow pipeline away from the slag collecting ladle is communicated to the outside of the die casting mold.

[0009] The end of the sub-runner away from the main runner is connected to the side of the top surfaces of the two forming cavities close to each other.

[0010] Both of the sub-runners are fan-shaped.

[0011] Compared with the prior art, the beneficial effects of the utility model are that: by changing the positions of the main runner and the sub-runner, the feeding direction of the metal solution can be changed, the processing area can be quickly filled, the solution flow is more smooth and stable, the risk of forming a wrap is greatly reduced, product porosity defects are reduced, and product qualification rate is improved.

[0012] By setting the sub-runner as a fan shape, the kinetic energy of the main runner can be dispersed into multiple sub-flows, the linear attenuation of the filling speed is realized, the vortex and air wrapping defects caused by the speed difference are eliminated, and appearance defects such as flow marks and cold shuts of the formed product are further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0014] Fig. 1 It is the die casting mold pouring system structure schematic view of the utility model.

[0015] Fig. 2 It is the sectional structure schematic view of the sub-runner of the utility model.

[0016] Fig. 3 It is the structure schematic view of the exhaust module of the utility model.

[0017] Fig. 4 It is the structure schematic view of the overflow module of the utility model.

[0018] In the drawing: 1, pouring gate;11, main runner;12, sub-runner;13, forming cavity;14, inner gate;15, main exhaust pipeline;16, gas collecting bag;17, sub-exhaust pipeline;18, main overflow pipeline;19, slag collecting ladle;111, sub-overflow pipeline. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model.

[0020] In order to make the person in the technical field better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings.

[0021] It should be noted that the embodiments and the features and technical schemes in the embodiments in the utility model can be combined with each other without conflict.

[0022] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0023] Embodiment one

[0024] As Figs. 1-4 shown, a die-casting die for automobile parts production, including injection gate 1, the middle part of injection gate 1 is connected with main runner 11, two groups of sub-runners 12 are installed at the end of main runner 11 away from injection gate 1, the one end of two sub-runners 12 is provided with inner gate 14, the one end of two sub-runners 12 close to inner gate 14 is connected with forming cavity 13, the top surface of forming cavity 13 is provided with exhaust module, the middle part of forming cavity 13 is provided with overflow module.

[0025] Exhaust module includes multiple main exhaust pipes 15, gas collecting bag 16 and sub-exhaust pipe 17, one end of main exhaust pipe 15 is connected to the top surface of forming cavity 13, gas collecting bag 16 is connected to the end of main exhaust pipe 15 away from forming cavity 13, sub-exhaust pipe 17 is installed at the other end of gas collecting bag 16.

[0026] Overflow module includes multiple main overflow pipes 18 and slag collecting bag 19, main overflow pipes 18 are installed in the middle part of forming cavity 13, slag collecting bag 19 is installed at the end of main overflow pipes 18 away from forming cavity 13.

[0027] Overflow module also includes sub-overflow pipe 111, one end of sub-overflow pipe 111 is connected to the middle part of slag collecting bag 19, and the end of sub-overflow pipe 111 away from slag collecting bag 19 is communicated to the outside of die-casting die.

[0028] The end of sub-runner 12 away from main runner 11 is connected to the side of the top surface of two forming cavities 13 close to each other.

[0029] When the cylindrical sealing performance automobile parts such as filter cover needs to be pressure die cast, the metal solution is injected into the injection gate 1, at this time the solution will flow into the main runner 11 inside, and finally flow into the molding cavity 13 through the sub-runner 12. When the metal solution is filled in the molding cavity 13, the injection is stopped, and the mold is closed for pressure casting.

[0030] During the pressure casting process, the excess gas in the molding cavity 13 flows into the gas pocket 16 through the main exhaust pipe 15, and finally flows into the sub-exhaust pipe 17. The gas in the molding cavity 13 is discharged through the sub-exhaust pipe 17 to release the compressed gas in the molding cavity 13 and maintain the stability of the pressure gradient.

[0031] At the same time, the main overflow pipe 18 can discharge the impurities in the molding cavity 13, such as the oxide inclusions required for pressure casting, cold material, and release agent residue, to the slag pocket 19, and then discharge through the sub-overflow pipe 111, so as to reduce the flow marks and hard point defects caused by impurities.

[0032] And by changing the position of the main runner 11 and the sub-runner 12, the sub-runner 12 is connected to the side of the molding cavity 13, which can reduce the high-speed straight flow of the metal solution along the radial direction to the center of the molding cavity, and can form a vortex ring similar to a water flow vortex in the cylindrical structure. The gas is wrapped into the processing surface inner wall to form a wrapped gas hole, so that the metal solution is injected along the tangent direction or parallel direction of the processing surface, and the flow direction is consistent with the profile of the molding cavity 13. The inertial force drives the metal liquid to fill the wall, reduces the turbulence caused by vertical impact, and is like slowly pouring water along the cup wall with a straw, compared with directly pouring water into the bottom of the cup, the former has fewer bubbles.

[0033] This step changes the feeding direction of the metal solution by changing the position of the main runner 11 and the sub-runner 12, so that the metal solution can quickly fill the processing area, the solution flow is more smooth and stable, the risk of internal wrapping is greatly reduced, and the product porosity defect is reduced, and the product yield is improved.

[0034] Example two

[0035] As shown in Figs. 1-4 The two sub-runners 12 are both fan-shaped.

[0036] When working, the sub-runner 12 is set to fan-shaped, which means that the dynamic balance control of the metal liquid filling process is realized through geometric shape optimization. This step can disperse the kinetic energy of the main runner 11 into multiple sub-flows by setting the sub-runner 12 to fan-shaped, realize linear attenuation of the filling speed, eliminate vortex and gas wrapping defects caused by speed difference, and further reduce the appearance defects such as flow marks and cold separation of the molded product.

[0037] The preferred embodiments disclosed above are only used to help describe the utility model. The preferred embodiments do not describe all the details and do not limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. A die casting mold for producing an automobile part, comprising a sprue (1), characterized in that: The middle part of the injection gate (1) is connected with a main runner (11), the end of the main runner (11) away from the injection gate (1) is installed with two groups of sub-runners (12), the end of the two sub-runners (12) is provided with an inner gate (14), the end of the two sub-runners (12) close to the inner gate (14) is connected with a forming cavity (13), the top surface of the forming cavity (13) is provided with an exhaust die group, and the middle part of the forming cavity (13) is provided with an overflow die group.

2. A die casting mold for producing an automobile part according to claim 1, characterized in that: The exhaust die group comprises a plurality of main exhaust pipes (15), a gas collecting bag (16) and a sub-exhaust pipe (17), one end of the main exhaust pipe (15) is connected to the top surface of the forming cavity (13), the gas collecting bag (16) is connected to the end of the main exhaust pipe (15) away from the forming cavity (13), and the sub-exhaust pipe (17) is installed at the other end of the gas collecting bag (16).

3. A die casting mould for producing an automobile component as claimed in claim 1, wherein: The overflow die group comprises a plurality of main overflow pipes (18) and a slag collecting bag (19), the main overflow pipe (18) is installed in the middle part of the forming cavity (13), and the slag collecting bag (19) is installed at the end of the main overflow pipe (18) away from the forming cavity (13).

4. A die casting mold for producing an automobile part according to claim 3, characterized in that: The overflow die group further comprises a sub-overflow pipe (111), one end of the sub-overflow pipe (111) is connected to the middle part of the slag collecting bag (19), and the end of the sub-overflow pipe (111) away from the slag collecting bag (19) is communicated with the outside of the die casting mold.

5. A die casting mold for producing an automobile part according to claim 1, characterized in that: The end of the sub-runner (12) away from the main runner (11) is connected to the side of the top surface of the two forming cavities (13) close to each other.

6. A die casting mold for producing an automobile part according to claim 1, characterized in that: The two sub-runners (12) are both in the shape of a fan.

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