CN211679936U

CN211679936U - Die casting die insert structure

Info

Publication number: CN211679936U
Application number: CN202020204221.1U
Authority: CN
Inventors: 朱洪军; 张世恩; 程瑞; 曲太旭
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2020-02-21
Filing date: 2020-02-21
Publication date: 2020-10-16
Anticipated expiration: 2030-02-21

Abstract

The utility model provides a die casting die insert structure, include: the insert is connected with a movable die of the die, and the side core inserting structure is connected with the insert; wide grooves are symmetrically arranged on two sides of the middle position of a movable die of the die in the length direction, and inserts are arranged in the wide grooves; a tapered arc-shaped long groove is formed in the inner side of a movable die of the die in the length direction, and a side surface core inserting structure is arranged in the arc-shaped long groove; the insert is of a circular truncated cone structure with demoulding inclination, the middle part of the insert is provided with a through hole, and the through hole is a tapered conical hole; the side surface core inserting structure is a tapered conical structure, and one end of a conical tip of the side surface core inserting structure is inserted into the conical hole of the insert and is connected with the conical hole in a matching way; the insert and the side core inserting structure are positioned by axial center; one side of the insert is provided with a mistake-proofing groove, so that a worker can recognize the direction and prevent the forward and reverse from being reversed. The utility model discloses increase the inserts, improve the product percent of pass, the percent of pass is from original 50% improvement to 98%.

Description

Die casting die insert structure

Technical Field

The utility model relates to a die casting die technical field especially relates to a die casting die insert structure.

Background

The problem of shrinkage cavity generated by high-pressure casting of aluminum alloy is always a difficult problem for engineering technicians, and one important reason for generating the defect of shrinkage cavity is that the local material of a casting is too thick, so that a large amount of heat is released when aluminum liquid is converted from a liquid state to a solid state, namely a thermal node. The material at the hot spot is solidified and shrunk to generate irregular shrinkage cavities. The shrinkage cavity greatly reduces the strength and the service life of the automobile die-casting part.

In the die casting field, various schemes are provided for solving the problem of shrinkage cavity, including improving a pouring gate structure, enhancing cooling conditions, optimizing die casting process parameters and the like, wherein one very effective scheme is to add a die insert at a local hot spot and reduce the local thickness of a casting through the added insert in the die, so that the volume of the hot spot is reduced, and the purpose of reducing the shrinkage cavity is achieved.

The design of an insert in the die-casting die is a difficulty of die design, and the shape design of the insert, the accurate positioning of the insert and a die body, the tolerance of the matching part of the insert and the die, and the error prevention and pretreatment of the insert in the circulating process are key contents of an insert structure.

As shown in fig. 1, a schematic view of an engine hood is provided, and for convenience of mold design, a design means is generally adopted to design the part as a solid structure, as shown in fig. 2, and then a middle hole is machined through machining. The process means not only generates a large amount of shrinkage defect waste products, but also wastes a large amount of aluminum alloy materials, and has low economic benefit.

Therefore, in view of the above, there is a need to provide a new insert structure to solve the deficiencies of the prior art.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned technical problem, an insert structure for a die casting mold is provided. The utility model discloses mainly utilize to increase inserts and side lock pin structure in the mould to play and improve the product percent of pass, improve aluminum alloy material utilization ratio. The utility model discloses a technical means as follows:

a die casting mold insert structure comprising: the insert is connected with a movable die of the die, and the side core inserting structure is connected with the insert;

wide grooves are symmetrically formed in two sides of the middle position of the movable die of the die in the length direction, and the inserts are arranged in the wide grooves; a tapered arc-shaped long groove is formed in the inner side of the movable mold of the mold in the length direction, and the side surface core inserting structure is arranged in the arc-shaped long groove;

the insert is of a round table structure with demoulding inclination, a through hole is formed in the middle of the insert, and the through hole is a tapered conical hole;

the side ferrule structure is a tapered conical structure, and one end of a conical tip of the side ferrule structure is inserted into the conical hole of the insert and is in fit connection with the conical hole; the insert and the side core inserting structure are positioned in an axial center manner;

one side of the insert is provided with a mistake-proofing groove, so that a worker can recognize the direction and prevent the forward and reverse from being reversed.

Furthermore, two ends of the insert are flat surfaces and are connected with two end surfaces of the wide groove in a matched mode.

Furthermore, the insert has a demoulding slope, namely the diameter of the large end of the excircle of the insert is larger than that of the small end of the excircle of the insert; the range of the demoulding inclination is 0.5-2 degrees.

Further, the diameter of the large end is 38-40mm, and the diameter of the small end is 37-39 mm.

Further, the width of the insert is 18 mm.

Further, the axis of the conical hole of the insert coincides with the central axis of the side ferrule structure.

Further, the large taper end opening of the conical hole faces the side surface core inserting structure.

Furthermore, the large taper end opening of the conical hole and the large excircle end of the insert are located on the same side.

Further, the diameters of both ends of the conical hole are 14.2mm and 9.38mm, respectively.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model provides a die casting die insert structure increases this insert in the mould, can improve the product percent of pass, and the percent of pass is from original 50% improvement to 98%.

2. The utility model provides a die casting die insert structure improves aluminum alloy material utilization ratio, and auto parts's intermediate hole is the blind hole originally, has adopted the inserts now, and the aftertreatment inserts is pressed out, and each auto parts consequently saves 100 grams of quality.

3. The utility model provides a die casting die insert structure, for the round platform structure, convenient follow-up operation removes the insert from the foundry goods middling pressure.

4. The utility model provides a die casting die insert structure, the axial positioning of which is a side core-pulling central positioning structure, the positioning of two ends is skillfully utilizing the demoulding inclination of a movable mould, and two ends of the insert are flat surfaces matched with the flat surfaces; the positioning structure is simple and reliable.

Based on the above reason the utility model discloses can extensively promote in fields such as die casting die.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic illustration of a prior art cast blank for an engine hood.

FIG. 2 is a schematic view of a prior art engine cover having a central opening.

Fig. 3 is a schematic view of the assembly profile structure of the present invention.

Fig. 4 is a schematic diagram of an orthographic projection structure of the assembly of the present invention.

Fig. 5 is a sectional view of the movable mold of the middle mold of the present invention.

Fig. 6 is the connection schematic diagram of the movable mold, the insert and the side insert core structure of the middle mold of the present invention.

Fig. 7 is a schematic structural view of the insert of the present invention.

Fig. 8 is a cross-sectional view of the inventive insert.

Fig. 9 is an enlarged view of a position a in the present invention.

In the figure: 1. an insert; 2. a movable die of the die; 3. a side face core inserting structure; 4. a conical bore; 5. and (4) a groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 3-9, the utility model provides a novel practical die casting die insert 1 structure, include: an insert 1 connected to a moving die 2 of the die and a side insert core structure 3 connected to the insert 1.

Wide grooves are symmetrically formed in two sides of the middle position of the movable mold 2 of the mold in the length direction, and the inserts 1 are arranged in the wide grooves; the inner side of the movable mold 2 of the mold in the length direction is provided with a tapered arc-shaped long groove, and the side surface core-inserting structure 3 is arranged in the arc-shaped long groove.

The insert 1 is of a round table structure with demoulding inclination, a through hole is formed in the middle of the insert, and the through hole is a tapered conical hole 4; the radial design of the insert 1 is conical, radially symmetrical and rotatable.

The side surface core inserting structure 3 is a tapered conical structure, and after the side surface core inserting structure is installed as a mold, the tapered direction of the side surface core inserting structure 3 is consistent with the tapered direction of the arc-shaped long groove. One end of the conical tip of the side ferrule structure 3 is inserted into the conical hole 4 of the insert 1 and is connected with the conical hole 4 in a matching way; the insert 1 and the side surface core inserting structure 3 are positioned by axial centers.

One side of the insert 1 is provided with a mistake-proofing groove 5, so that a worker can recognize the direction and prevent the forward and reverse directions from being reversed.

The two ends of the insert 1 are flat surfaces and are connected with the two end surfaces of the wide groove in a matched mode. The fact that the insert 1 has the demolding inclination means that the diameter of the large end of the excircle of the insert 1 is larger than that of the small end of the excircle of the insert. Wherein the range of the demoulding inclination is 0.5-2 degrees. The diameter of the big end is 39mm, and the diameter of the small end is 38 mm. The width of the insert 1 is 18mm and there are tolerances, an upper deviation of-0.04 and a lower deviation of-0.06.

The axis of the conical hole 4 of the insert 1 coincides with the central axis of the side core-inserting structure 3. The large taper end opening of the conical hole 4 faces the side surface ferrule structure 3. The opening of the large taper end of the conical hole 4 and the large end of the excircle of the insert 1 are positioned on the same side. The diameters of two ends of the conical hole 4 are 14.2mm and 9.38mm respectively, and the end with the diameter of 9.38mm has tolerance, the upper deviation is +0.02, and the lower deviation is 0.

The casting production working process comprises the following steps: the method comprises the steps of placing an insert 1 into a manipulator, introducing a side face insert core structure 3 into the insert 1, positioning, mold closing, casting, injecting, maintaining pressure, mold opening, pushing a casting out of a mold and placing the insert 1 into the manipulator.

The insert 1 needs to be placed towards the left side of the mold strictly according to the scribing direction when placed in the mold, otherwise the side core-inserting structure 3 will collide with the small-taper hole end of the conical hole 4 of the insert 1, and the side core-inserting structure 3 will be damaged.

Each casting containing the insert 1 is pressed out in a subsequent cleaning process. When the insert 1 is removed, the mold release inclination is required, and the mold release inclination of the insert 1 is embodied on the excircle with the large end phi 39mm and the small end phi 38 mm. The insert 1 is cast in the vehicle part after the die-casting production, and subsequently, the insert 1 needs to be taken out of the vehicle part, and the demoulding inclination can reduce the pressure removal force.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A die casting die insert structure, comprising: the insert structure comprises an insert (1) connected with a movable die (2) of the die and a side core inserting structure (3) connected with the insert (1);

wide grooves are symmetrically formed in two sides of the middle position of the movable mold (2) of the mold in the length direction, and the inserts (1) are arranged in the wide grooves; the inner side of the movable mold (2) of the mold in the length direction is provided with a tapered arc-shaped long groove, and the side surface core inserting structure (3) is arranged in the arc-shaped long groove;

the insert (1) is of a circular truncated cone structure with demoulding inclination, a through hole is formed in the middle of the insert, and the through hole is a tapered conical hole (4);

the side ferrule structure (3) is a tapered conical structure, and one end of a conical tip of the side ferrule structure (3) is inserted into the conical hole (4) of the insert (1) and is connected with the conical hole (4) in a matched manner; the insert (1) and the side core inserting structure (3) are positioned in an axial center manner;

one side of the insert (1) is provided with a mistake-proofing groove (5), so that a worker can recognize the direction and prevent the forward and reverse from being reversed.

2. The die-casting die insert structure as claimed in claim 1, wherein two ends of the insert (1) are flat surfaces and are in fit connection with two end surfaces of the wide groove.

3. The die casting die insert structure as claimed in claim 1 or 2, wherein the insert (1) has a draft angle that means that the diameter of the large end of the outer circle of the insert (1) is larger than the diameter of the small end; the range of the demoulding inclination is 0.5-2 degrees.

4. A die casting die insert structure as claimed in claim 3 wherein the diameter of the large end is 38-40mm and the diameter of the small end is 37-39 mm.

5. A die casting mould insert structure according to claim 3, characterized in that the width of the insert (1) is 18 mm.

6. A die casting mould insert structure according to claim 3, characterized in that the axis of the conical bore (4) of the insert (1) coincides with the central axis of the side core-insert structure (3).

7. The die casting mold insert structure as claimed in claim 6, characterized in that the largely tapered end of the conical bore (4) opens towards the side core insert structure (3).

8. A die casting mould insert structure as claimed in claim 7, characterised in that the large taper end opening of the conical bore (4) is on the same side as the outer large end of the insert (1).

9. A die casting mould insert structure as claimed in claim 8, characterised in that the diameter of the conical bore (4) at both ends is 14.2mm and 9.38mm respectively.