Die-casting die insert inner expansion type expansion mechanism and die-casting die

Abstract

The application discloses a die-casting die insert inner expansion type expansion mechanism and a die-casting die, wherein the die-casting die insert inner expansion type expansion mechanism comprises a bushing and a nest, a expansion part capable of moving along the radial direction of the bushing is arranged on the circumferential side surface of the bushing, the nest is sleeved on the bushing in the axial direction of the bushing and is located at the position corresponding to the expansion part, and the inner side wall of the nest is provided with a matching part capable of limiting the expansion part in position. The expansion part arranged on the circumferential side surface of the bushing is matched with the matching part to limit the position and fix the nest, and the mechanism for fixing the nest by means of the skirt edge pressing of the movable die bushing and the fixed die bushing is replaced, so that the problem of excessive machining allowance caused by the existing mechanism for fixing the nest is solved.

Description

Technical Field

[0001] This invention relates to the field of die casting mold technology, and in particular to a die casting mold insert internal expansion tensioning mechanism and a die casting mold. Background Technology

[0002] In die casting, when inserts are needed, they are first fixed in the die casting mold, and then die casting is performed using a die casting machine to cast the die casting part and the insert together. This method can make full use of the properties of various materials (such as strength, hardness, corrosion resistance, wear resistance, magnetic permeability, electrical conductivity, etc.) to meet the requirements of use under different conditions, and can also make up for the shortcomings caused by the poor manufacturability of die casting parts, thus solving the die casting problem of parts with special technical requirements.

[0003] Currently, the common method for fixing sleeve-type inserts involves providing a skirt on the insert, which is then secured by a moving mold insert and a fixed mold insert that together press against the skirt. However, because this additional skirt is required, this fixing method results in excess machining allowance after the casting is die-cast. Summary of the Invention

[0004] The main objective of this invention is to propose an internal expansion tensioning mechanism for die-casting mold inserts and a die-casting mold, aiming to solve the problem of excessive machining allowance caused by existing fixed nesting mechanisms.

[0005] To achieve the above objectives, the present invention proposes an internal expansion tensioning mechanism for die-casting mold inserts, wherein the internal expansion tensioning mechanism for die-casting mold inserts includes: The sleeve has a tensioning portion on its peripheral side that can move radially therein; and... The nested part is fitted onto the sleeve along the axial direction of the sleeve at the position corresponding to the tensioning part. The inner sidewall of the nested part is provided with a mating part, which can cooperate with the tensioning part for limiting.

[0006] Optionally, the peripheral side of the insert is provided with a plurality of elastic elements, and the plurality of elastic elements are spaced apart along the circumferential direction of the insert; The tensioning part includes a plurality of the elastic elements.

[0007] Optionally, the nested inner sidewall is provided with annular grooves corresponding to the positions of the multiple elastic elements, for accommodating the multiple elastic elements; The mating part includes the annular groove.

[0008] Optionally, at least some of the elastic elements are located on the same circumferential cross section to form an elastic element group, and multiple elastic element groups are provided and spaced apart along the axial direction of the insert. Correspondingly, multiple annular grooves are provided.

[0009] Optionally, along the nested splicing direction, in the elastic element groups on adjacent circumferential cross sections, the elastic force of the elastic element in the front elastic element group is less than the elastic force of the elastic element in the rear elastic element group.

[0010] Optionally, a plurality of the elastic elements are embedded on the peripheral side surface of the insert.

[0011] Optionally, the elastic element includes spring steel balls or pneumatic steel balls.

[0012] Optionally, the insert includes a moving mold insert and / or a fixed mold insert.

[0013] Optionally, the nesting includes a steel sleeve.

[0014] The present invention also provides a die-casting mold, the die-casting mold including an internal expansion tensioning mechanism for the die-casting mold insert, the internal expansion tensioning mechanism for the die-casting mold insert comprising: The sleeve has a tensioning portion on its peripheral side that can move radially therein; and... The nested part is fitted onto the sleeve along the axial direction of the sleeve at the position corresponding to the tensioning part. The inner sidewall of the nested part is provided with a mating part, which can cooperate with the tensioning part for limiting.

[0015] In the technical solution provided by the present invention, a tensioning part that can move radially is provided on the peripheral side of the insert, and the nest is then sleeved on the insert along the axial direction of the insert at the position corresponding to the tensioning part. The tensioning part moves radially and engages with the mating part to achieve tensioning, thereby limiting the nest and fixing the nest to the insert. This replaces the mechanism that uses a moving mold insert and a fixed mold insert to press and fix the skirt added to the nest, reducing the use of inserts and eliminating the need to add an extra skirt to the nest, thus solving the problem of excessive machining allowance caused by the existing fixed nest mechanism. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A perspective view of an embodiment of the internal expansion tensioning mechanism for die-casting mold inserts provided by the present invention; Figure 2 for Figure 1 A three-dimensional schematic diagram of the internal expansion tensioning mechanism (without nesting) of the die-casting mold insert; Figure 3 for Figure 1 A cross-sectional schematic diagram of the internal expansion tensioning mechanism of the die-casting mold insert; Figure 4 A cross-sectional schematic diagram of another embodiment of the internal expansion tensioning mechanism for die-casting mold inserts provided by the present invention; Figure 5 This is a schematic cross-sectional view of a die-casting mold insert fixing mechanism in the prior art; Figure 6 This is a partial cross-sectional schematic diagram of the die-casting mold insert internal expansion tensioning mechanism provided by the present invention in the casting after die casting.

[0018] Explanation of icon numbers: 100. Tensioning mechanism; 1. Sleeve; 11. Tensioning part; 111. Elastic element; 111a. Spring steel ball; 12. Moving mold sleeve; 13. Fixed mold sleeve; 2. Nesting; 21. Mating part; 211. Ring groove; 22. Steel sleeve; 23. Skirt; 3. Excess machining allowance; 4. Casting.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] In die casting, when inserts are needed, they are first fixed in the die casting mold, and then die casting is performed using a die casting machine to cast the die casting part and the insert together. This method can make full use of the properties of various materials (such as strength, hardness, corrosion resistance, wear resistance, magnetic permeability, electrical conductivity, etc.) to meet the requirements of use under different conditions, and can also make up for the shortcomings caused by the poor manufacturability of die casting parts, thus solving the die casting problem of parts with special technical requirements.

[0024] Currently, the common method for fixing sleeve-type inserts involves providing a skirt on the insert, and then connecting the moving mold insert and the fixed mold insert to jointly press the skirt against the insert for fixation. However, because an additional skirt is required, this fixing method results in excess machining allowance after the die-casting process. To solve the above problems, this invention provides an internal expansion tensioning mechanism for die-casting mold inserts. Figures 1 to 4 This invention provides a specific embodiment of an internal expansion tensioning mechanism for a die-casting mold insert.

[0025] Please see Figures 1 to 3 The die-casting mold insert internal expansion tensioning mechanism 100 includes a sleeve 1 and a nest 2. The sleeve 1 has a tensioning part 11 that can move radially on its peripheral side. The nest 2 is sleeved on the sleeve 1 along the axial direction of the sleeve 1 at the position corresponding to the tensioning part 11. The inner side wall of the nest 2 is provided with a mating part 21, which can cooperate with the tensioning part 11 to limit the movement.

[0026] It should be noted that, please refer to Figure 5, which is a cross-sectional schematic diagram of the existing die-casting mold insert fixing mechanism. The existing method of fixing the nest 2 involves pressing and fixing the skirt 23 added to the nest 2 by the moving mold insert 12 and the fixed mold insert 13. Please refer to [further details omitted]. Figure 6This is a partial cross-sectional schematic diagram of the die-casting mold insert internal expansion tensioning mechanism 100 provided by the present invention on the casting 4 after die casting. The dotted circle indicates the excess machining allowance 3, which is the excess machining allowance 3 that the die-casting mold insert internal expansion tensioning mechanism 100 provided in this embodiment can reduce compared with the existing fixed mechanism. By reducing the excess machining allowance 3, the processing time is reduced, the production efficiency is improved, and the production cost is reduced.

[0027] In the technical solution provided by the present invention, a tensioning part 11 that can move radially is provided on the peripheral side of the insert 1, and the nest 2 is sleeved on the insert 1 along the axial direction of the insert 1 at the position corresponding to the tensioning part 11. The tensioning part 11 moves radially and engages with the mating part 21 to achieve a limiting position of the nest 2, so that the nest 2 is fixed on the insert. This replaces the mechanism of pressing and fixing the skirt 23 added to the nest 2 by the moving mold insert 12 and the fixed mold insert 13, which reduces the use of inserts and eliminates the need to add an extra skirt 23 to the nest 2, thus solving the problem of excessive machining allowance caused by the existing mechanism for fixing the nest 2.

[0028] Specifically, please refer to Figure 2 and Figure 3 The insert 1 has a plurality of elastic elements 111 on its circumferential side. The plurality of elastic elements 111 are spaced apart along the circumferential direction of the insert 1. The tensioning part 11 includes a plurality of elastic elements 111. By providing a plurality of elastic elements 111, the tensioning force on the inner sidewall of the nest 2 is increased, thereby improving the stability of the nest 2 confined within the insert 1. Furthermore, the elastic elements 111 are spaced apart along the circumferential direction of the insert 1, so that the inner sidewall of the nest 2 can be subjected to force in the circumferential direction to achieve force balance.

[0029] Furthermore, to avoid excessive interference between the multiple elastic elements 111 and the inner wall of the nest 2 when the nest 2 is fitted, the inner wall of the nest 2 is provided with an annular groove 211 corresponding to the positions of the multiple elastic elements 111, for accommodating the multiple elastic elements 111. The mating part 21 includes the annular groove 211. During the process of the nest 2 being fitted onto the insert 1, the elastic elements 111 are compressed by force. When the nest 2 is completely fitted onto the insert 1, the multiple elastic elements 111 correspond to the annular groove 211 and are tightened and locked into the annular groove 211, thereby achieving the limiting and fixing of the nest 2. Moreover, the multiple elastic elements 111 are accommodated in the groove, which can further restrict the movement of the nest 2 in its axial direction.

[0030] Specifically, please refer to Figure 4In another embodiment of the present invention, at least some of the elastic elements 111 are located on the same circumferential cross section to form a group of elastic elements 111. Multiple groups of elastic elements 111 are provided and spaced apart along the axial direction of the insert 1. Correspondingly, multiple annular grooves 211 are provided. Since the multiple elastic elements 111 in each group of elastic elements 111 are located on the same circumferential cross section, the multiple elastic elements 111 in each group can cooperate with one annular groove 211. Furthermore, by providing multiple groups, when the nest 2 is fitted onto the insert 1, it needs to be fitted one group at a time, which enhances the stability of the limiting and can prevent the nest 2 from falling off due to damage to individual elastic elements 111.

[0031] Furthermore, to facilitate manual placement of the nest 2 onto the insert 1, in the adjacent circumferential cross-sections of the nest 2, the elastic force of the elastic element 111 in the front group of the elastic element 111 is less than that in the rear group of the elastic element 111. This reduces the external force required when manually placing the nest 2, making it easier to place. Additionally, when placing it backwards, the interference of the front group of elastic elements 111 on the backward placement process is also reduced. This allows the tensioning mechanism 100 to place the nest 2 onto the insert 1 more conveniently and effortlessly while maintaining sufficient limiting capability.

[0032] Specifically, during the process of the nest 2 being fitted onto the insert 1, multiple elastic elements 111 will be compressed due to contact with the inner sidewall of the nest 2. When the compression space is insufficient, the elastic elements 111 may be crushed by the nest 2. In order to provide sufficient compression space for the elastic elements 111, multiple elastic elements 111 are embedded on the peripheral side of the insert 1.

[0033] It should be noted that the elastic element 111 is not specifically limited. Specifically, in this embodiment, the elastic element 111 includes spring steel ball 111a or pneumatic steel ball.

[0034] Specifically, the insert 1 includes a moving mold insert 12 and / or a fixed mold insert 13. During die casting, the nest 2 can be fixed to the moving mold insert 12 or the fixed mold insert 13, or fixed to both the moving mold insert 12 and the fixed mold insert 13. In this embodiment, the nest 2 is fitted onto the moving mold insert 12.

[0035] Specifically, the nesting 2 includes a steel sleeve 22.

[0036] In addition, the present invention also provides a die casting mold, the die casting mold including the die casting mold insert internal expansion tensioning mechanism 100. The specific structure of the die casting mold insert internal expansion tensioning mechanism 100 is as described in the above embodiments. Since the die casting mold insert internal expansion tensioning mechanism 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A type of internal expansion tensioning mechanism for a die-casting mold insert, characterized in that, include: The sleeve has a tensioning part that can move radially along its peripheral side; as well as, Nested, the nest is fitted onto the sleeve along the axial direction of the sleeve at the position corresponding to the tensioning part, and the inner sidewall of the nest is provided with a mating part, which can cooperate with the tensioning part for limiting position; The peripheral side of the insert is provided with a plurality of elastic elements, which are spaced apart along the circumference of the insert. The tensioning part includes a plurality of the elastic elements; The nested inner sidewall is provided with annular grooves corresponding to the positions of the multiple elastic elements, for accommodating the multiple elastic elements; The mating part includes the annular groove; At least some of the elastic elements are located on the same circumferential cross section to form an elastic element group, and multiple elastic element groups are provided and spaced apart along the axial direction of the insert. Correspondingly, multiple annular grooves are provided. Along the nested splicing direction, in the elastic element groups on adjacent circumferential cross sections, the elastic force of the elastic element in the front elastic element group is less than the elastic force of the elastic element in the rear elastic element group.

2. The internal expansion tensioning mechanism of the die-casting mold insert as described in claim 1, characterized in that, Multiple elastic elements are embedded on the peripheral side surface of the insert.

3. The internal expansion tensioning mechanism for die-casting mold inserts as described in claim 1, characterized in that, The elastic element includes spring steel balls or pneumatic steel balls.

4. The internal expansion tensioning mechanism for die-casting mold inserts as described in claim 1, characterized in that, The inserts include moving mold inserts and / or fixed mold inserts.

5. The internal expansion tensioning mechanism for die-casting mold inserts as described in claim 1, characterized in that, The nesting includes a steel sleeve.

6. A die-casting mold, characterized in that, Includes the internal expansion tensioning mechanism of the die casting mold insert as described in any one of claims 1-5.

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