Die casting mold for aluminum alloy

Abstract

The utility model provides a kind of die casting die for aluminum alloy, it is related to mould field, including movable mould and fixed mould, the four symmetries of movable mould and fixed mould are equipped with first guide mechanism and second guide mechanism;The first guide mechanism is made of locating post fixed on movable mould and auxiliary guide bush arranged on fixed mould;The second guide mechanism is guide pillar guide bush;When clamping, the first guide mechanism contacts first, the preliminary positioning of movable mould and fixed mould is completed and bears main locking force;The second guide mechanism contacts after the first guide mechanism completes preliminary positioning, realizes the secondary accurate positioning of movable mould and fixed mould.The application is worked by setting two sets of guide mechanism in stages, the first guide mechanism contacts first and bears main locking force, to avoid clamping impact damage mould;Second guide mechanism secondary accurate positioning eliminates cumulative error, improves positioning accuracy;Double mechanism division of labor reduces guide wear, prolongs mould life.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular to a die-casting mold for aluminum alloys. Background Technology

[0002] In modern industrial production, aluminum alloys are widely used in automobile manufacturing, aerospace, and electronic equipment due to their excellent properties such as low density, high strength, and corrosion resistance. Die casting, as a crucial process in aluminum alloy forming, relies heavily on the performance of its molds to determine the quality and production efficiency of die-cast aluminum alloy parts.

[0003] Currently, most existing aluminum alloy die-casting molds use a single guiding system, such as a guide post and guide sleeve structure. During mold opening and closing, a single guiding system lacks an effective buffering mechanism, resulting in a large impact force at the moment of mold closing. This not only damages the mold but also affects the forming quality of the die-cast parts. Furthermore, after prolonged use, the single guiding structure is prone to wear, leading to a decrease in guiding accuracy and failing to meet the production requirements of high-precision aluminum alloy die-cast parts. In addition, frequent impacts and friction accelerate the wear of the guiding components, shorten the mold's service life, and increase maintenance costs and downtime.

[0004] Therefore, a die-casting mold for aluminum alloys is proposed. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by setting up two sets of guiding mechanisms that work in stages. The first guiding mechanism first contacts and bears the main clamping force, avoiding impact damage to the mold during mold closing; the second guiding mechanism performs secondary precision positioning to eliminate accumulated errors and improve positioning accuracy; the division of labor between the two mechanisms reduces wear on the guiding components and extends the mold life.

[0006] To solve the above-mentioned technical problems, this utility model solves the problems of mold closing impact, insufficient positioning accuracy, and easy wear of guide components caused by a single guide system through the following technical solution.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A die-casting mold for aluminum alloy includes a moving mold and a fixed mold. The moving mold and the fixed mold are symmetrically provided with a first guide mechanism and a second guide mechanism around their perimeters. The first guide mechanism consists of a positioning post fixed on the moving mold and an auxiliary guide sleeve disposed on the fixed mold. The second guide mechanism consists of a guide post and a guide sleeve. When the mold is closed, the first guide mechanism contacts the second guide mechanism first, completing the initial positioning of the moving mold and the fixed mold and bearing the main clamping force. The second guide mechanism contacts the first guide mechanism after the first guide mechanism has completed the initial positioning, realizing the secondary precise positioning of the moving mold and the fixed mold.

[0009] Preferably, the height of the positioning post is greater than the height of the guide post in the guide sleeve, forming a height difference to ensure that the first guiding mechanism makes contact first.

[0010] Preferably, the surface of the positioning post is provided with a self-lubricating groove for embedding solid lubricant.

[0011] Preferably, a spring structure is provided between the positioning post and the fixed mold. One end of the spring structure is fixed to the positioning post, and the other end is connected to a movable spring seat. When the mold is closed, the spring seat presses against the inner surface of the fixed mold to form a pre-tightening force.

[0012] Preferably, an annular groove is formed on the outer periphery of the positioning post, and the spring structure is installed around the annular groove.

[0013] Preferably, the positioning pins are symmetrically distributed at the four corners and the middle of the long side of the moving mold, with a quantity of at least four, and the auxiliary guide sleeve is correspondingly provided at the positioning pin mating position of the fixed mold.

[0014] Preferably, the moving mold is provided with a T-shaped groove around its perimeter, and an installation sleeve is embedded in the groove. The bottom of the positioning post is threadedly connected to the installation sleeve by a screw.

[0015] Preferably, the end of the positioning post is provided with a guide slope.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The die-casting mold for aluminum alloy provided in this application uses two sets of guiding mechanisms to work in stages. The first guiding mechanism first contacts and bears the main clamping force to avoid impact damage to the mold when the mold is closed. The second guiding mechanism performs secondary precision positioning to eliminate accumulated errors and improve positioning accuracy. The division of labor between the two mechanisms reduces wear on the guiding components and extends the mold life.

[0018] The self-lubricating grooves of the locating pins, filled with lubricant, reduce friction and minimize pin wear. The spring structure provides a buffer preload, absorbing impact energy during mold closing. Annular grooves fix the spring position, enhancing the stability of the buffer structure. The symmetrical arrangement of the locating pins improves positioning uniformity and increases mold closing rigidity. Detachable connections facilitate individual replacement of worn locating pins, reducing maintenance costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention in the mold-open state;

[0022] Figure 3 This is a schematic diagram of the structure of the moving mold of this utility model;

[0023] Figure 4 This is a partial cross-sectional structural diagram of the moving mold of this utility model;

[0024] Figure 5 This is a schematic diagram of the disassembled structure of the positioning column at the moving mold of this utility model;

[0025] Figure 6 This is a cross-sectional structural diagram of the positioning column at the moving mold of this utility model.

[0026] Drawing number explanation: 1. Moving mold; 2. Fixed mold; 3. Guide post and guide sleeve; 4. Positioning post; 41. Guide slope; 42. Screw; 43. Self-lubricating groove; 44. Annular groove; 5. Mounting sleeve; 6. Auxiliary guide sleeve; 7. Spring structure; 71. Spring seat one. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0029] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0030] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0031] Example:

[0032] Please see Figure 1-6 A die-casting mold for aluminum alloy includes a moving mold 1 and a fixed mold 2. The moving mold 1 and the fixed mold 2 are symmetrically provided with a first guide mechanism and a second guide mechanism around their perimeters. The first guide mechanism consists of a positioning post 4 fixed on the moving mold 1 and an auxiliary guide sleeve 6 provided on the fixed mold 2. The second guide mechanism consists of a guide post and a guide sleeve 3. When the mold is closed, the first guide mechanism contacts the second guide mechanism first, completing the initial positioning of the moving mold 1 and the fixed mold 2 and bearing the main clamping force. The second guide mechanism contacts the first guide mechanism after the first guide mechanism has completed the initial positioning, realizing the secondary precise positioning of the moving mold 1 and the fixed mold 2.

[0033] The die-casting mold for aluminum alloys in this application is mainly composed of components such as moving mold 1, fixed mold 2, first guide mechanism, and second guide mechanism. The following is a detailed description of its structure and working principle.

[0034] The mold body consists of a moving mold 1 and a fixed mold 2, which are precisely matched through two sets of independent guiding mechanisms. The first and second guiding mechanisms are symmetrically arranged around the perimeter of the moving mold 1 and the fixed mold 2, forming a composite guiding system. The first guiding mechanism consists of a positioning pin 4 fixed on the moving mold 1 and an auxiliary guide sleeve 6 set on the fixed mold 2, providing initial positioning and bearing the main clamping force. The height of the positioning pin 4 is greater than the height of the guide pin in the guide sleeve 3, creating a clear height difference to ensure that the first guiding mechanism contacts first during mold closing.

[0035] The locating post 4 has a self-lubricating groove 43 on its surface, into which a solid lubricant such as molybdenum disulfide or graphite is embedded to reduce friction and wear. A guide slope 41 is provided at the end of the locating post, serving the function of the locating post 4. A spring structure 7 is provided between the locating post 4 and the moving mold 1. One end of the spring structure 7 is fixed to the bottom of the locating post 4, and the other end is connected to a movable spring seat 71. An annular groove 44 is formed on the outer periphery of the locating post 4, and the spring structure 7 is installed around it to ensure stability when the spring is compressed. During mold closing, the surface of the spring seat 71 presses against the inner surface of the fixed mold 2, forming a preload force to buffer the impact of mold closing.

[0036] Positioning pins 4 are symmetrically distributed at the four corners and the middle of the long side of the moving mold 1, with a minimum number of 4 (e.g., 4 or 6). Auxiliary guide sleeves 6 are correspondingly set at the mating positions of the fixed mold 2. T-shaped grooves are opened around the moving mold 1, and detachable mounting sleeves 5 are embedded in the grooves. The bottom of the positioning pins 4 is threadedly connected to the mounting sleeves 5 by screws 42, which facilitates the individual replacement of worn positioning pins 4.

[0037] The second guiding mechanism adopts the traditional guide post and guide sleeve 3 structure, but through the timing coordination with the first guiding mechanism, it only undertakes the function of fine positioning and does not directly bear the initial mold closing impact force.

[0038] Working principle:

[0039] When the moving mold 1 moves towards the fixed mold 2, the positioning pin 4 inserts into the auxiliary guide sleeve 6 first. Since the height of the positioning pin is greater than that of the guide pin, a "first contact" mechanism is formed. The guide slope 41 provides guidance, and the self-lubricating groove 43 on the surface of the positioning pin 4 reduces the frictional resistance during insertion. At the same time, the spring structure 7 is compressed, generating a buffer force to absorb the impact energy at the moment of mold closing, preventing the impact force from acting directly on the guide pin and guide sleeve 3. The first guiding mechanism bears the main clamping force, and at this time, the moving mold 1 and the fixed mold 2 complete the initial positioning.

[0040] As the moving mold 1 continues to move, the guide pillars and guide sleeves 3 begin to contact. Since the first guiding mechanism has already completed the initial positioning, the guide pillars and guide sleeves 3 only need to correct minor deviations to achieve precise positioning. The phased guiding mechanism avoids the cumulative errors of a single guiding system, and the secondary positioning further calibrates the mold closing accuracy, ensuring the accuracy of the die-cast parts' forming dimensions. The positioning pillar 4 cooperates with the spring structure 7. During mold closing, the elastic deformation of the spring structure 7 first absorbs the impact energy, protecting the guide pillars and guide sleeves 3 from direct impact and reducing the risk of deformation. After the first guiding mechanism completes the coarse positioning, the guide pillars and guide sleeves 3 only need to correct minor deviations, avoiding the accuracy degradation problem caused by long-term wear of a single guiding structure. The phased guiding mechanism eliminates positioning errors in layers through a "coarse adjustment + fine adjustment" method.

[0041] The self-lubricating groove 43 reduces frictional wear between the positioning pin 4 and the auxiliary guide sleeve 6, while the spring structure 7 isolates impacts and reduces the wear rate of the guide pin and guide sleeve 3. The detachable mounting sleeve 5 design facilitates individual replacement of worn parts, reducing overall maintenance costs. During mold opening, the moving mold 1 separates from the fixed mold 2, and the positioning pin 4 is first pulled out of the auxiliary guide sleeve 6. The spring structure 7 then restores its deformation, assisting the movement of the positioning pin 4. When the positioning pin 4 wears, the screw 42 can be directly removed for replacement without disassembling the entire guiding system, reducing downtime.

[0042] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A die-casting mold for aluminum alloys, comprising a moving mold (1) and a fixed mold (2), characterized in that: The moving mold (1) and the fixed mold (2) are symmetrically provided with a first guide mechanism and a second guide mechanism around their perimeter; The first guiding mechanism consists of a positioning post (4) fixed on the moving mold (1) and an auxiliary guide sleeve (6) set on the fixed mold (2); The second guiding mechanism is a guide post and guide sleeve (3); When the mold is closed, the first guide mechanism contacts the second guide mechanism first, completes the initial positioning of the moving mold (1) and the fixed mold (2) and bears the main clamping force; the second guide mechanism contacts the first guide mechanism after the first guide mechanism completes the initial positioning, and realizes the secondary precise positioning of the moving mold (1) and the fixed mold (2).

2. The die-casting mold for aluminum alloy according to claim 1, characterized in that: The height of the positioning post (4) is greater than the height of the guide post in the guide sleeve (3), forming a height difference to ensure that the first guiding mechanism makes contact first.

3. The die-casting mold for aluminum alloy according to claim 2, characterized in that: The positioning post (4) has a self-lubricating groove (43) for embedding solid lubricant on its surface.

4. The die-casting mold for aluminum alloy according to claim 1, characterized in that: A spring structure (7) is provided between the positioning post (4) and the fixed mold (2). One end of the spring structure (7) is fixed to the positioning post (4), and the other end is connected to a movable spring seat (71). When the mold is closed, the spring seat (71) presses against the inner surface of the fixed mold (2) to form a pre-tightening force.

5. The die-casting mold for aluminum alloy according to claim 4, characterized in that: The positioning post (4) has an annular groove (44) on its outer periphery, and the spring structure (7) is installed around the annular groove (44).

6. The die-casting mold for aluminum alloy according to claim 5, characterized in that: The positioning pins (4) are symmetrically distributed at the four corners and the middle of the long side of the moving mold (1), with a minimum number of four. The auxiliary guide sleeve (6) is provided at the mating position of the positioning pins (4) of the fixed mold (2).

7. The die-casting mold for aluminum alloy according to claim 6, characterized in that: The moving mold (1) is provided with a T-shaped groove around its perimeter, and an installation sleeve (5) is embedded in the groove. The bottom of the positioning post (4) is threadedly connected to the installation sleeve (5) by a screw (42).

8. The die-casting mold for aluminum alloy according to claim 1, characterized in that: The end of the positioning post (4) is provided with a guide slope (41).

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