Metal gravity casting mold for suspension wire fixing hook

Abstract

The invention provides a metal gravity casting mold for a suspension wire fixing hook, which is used for casting the suspension wire fixing hook, the suspension wire fixing hook comprises a mounting seat and a suspension wire hook which are connected with each other, and comprises a horizontally arranged lower mold, and the lower mold is provided with a casting cavity for molding the suspension wire fixing hook; the casting cavity comprises a suspension wire hook cavity and is used for forming a suspension wire hook; the suspension wire hook cavity is horizontally arranged; and the outer side of the suspension wire hook cavity is connected with a blind riser. The device has the beneficial effects that 1, the suspension wire hook cavity is horizontally arranged, so that the phenomenon that the casting head is subjected to reverse feeding due to the gravity action of molten metal during cooling and solidification can be avoided; 2, the blind riser enables the top part of the suspension wire hook to obtain the feeding effect of molten metal of the blind riser at the upper end when the top part is cooled and solidified, so that the internal defects such as shrinkage porosity are reduced, and the casting quality is improved;

Description

Technical Field

[0001] The present invention relates to the technical field of molds, in particular to the casting of railway catenary parts, and specifically to a gravity die casting mold for a wire fixing hook made of metal mold. Background Art

[0002] The mounting seat and the wire hook of the railway catenary wire fixing hook are connected to each other. The mounting seat is used for the installation and fixation of the wire fixing hook, and the wire hook is used for connecting and fixing the catenary wire. The wire fixing hook is generally formed by casting.

[0003] The traditional gravity die casting mold for the wire fixing hook made of metal mold, such as Figure 4 As shown, the mold cavity is arranged vertically. During the casting filling process, the riser needs to compensate for the shrinkage of the wire hook in the bottom cavity. And there is no heat insulation groove between the riser of the wire hook in the bottom cavity and the first wire hook. As a result, during the cooling and solidification process of the casting mold, the molten aluminum in the wire hook cavity reversely compensates for the shrinkage of the bottom riser under the action of gravity, resulting in shrinkage cavity and porosity defects at the back position of the wire hook. Moreover, due to the hot spot existing in the hook part of the wire fixing hook during casting cooling, and neither of the upper and lower risers can effectively compensate for the shrinkage of the corresponding hot spot part of the wire hook, it is easy to generate porosity at the top of the wire hook, resulting in the risk of fracture of the wire hook during use. Summary of the Invention

[0004] In order to solve the technical problems in the background art, the present invention discloses a gravity die casting mold for a wire fixing hook made of metal mold.

[0005] The present invention provides a gravity die casting mold for a wire fixing hook made of metal mold, which is used for casting a wire fixing hook. The wire fixing hook includes a mounting seat and a wire hook connected to each other, and includes a lower mold arranged horizontally. The lower mold is provided with a casting cavity for forming the wire fixing hook.

[0006] The casting cavity includes a wire hook cavity for forming the wire hook.

[0007] The wire hook cavity is arranged horizontally.

[0008] An internal riser is connected to the outside of the wire hook cavity.

[0009] The beneficial effects of the above settings are as follows: 1. By changing the vertical arrangement of the hanging wire hook cavity to a horizontal arrangement, the problem of reverse feeding of the riser by molten metal due to gravity during cooling and solidification is effectively avoided, thus significantly reducing the shrinkage cavity and porosity defects in the back area of the hanging wire hook; 2. An implicit riser is innovatively arranged outside the hanging wire hook cavity, and an independent feeding channel is constructed for the hot spot area during the cooling of the hook top; when the molten metal at the top of the hanging wire hook solidifies and shrinks, the molten metal in the implicit riser can directly perform directional feeding on the hot spot part through the feeding power formed by the temperature gradient, solving the technical bottleneck that the traditional upper and lower risers cannot effectively cover the hot spot area, and significantly reducing the porosity hidden danger at the top of the hook; 3. Through the dual optimization of the cavity layout and the feeding structure, the hanging wire fixed hook cast by this mold can achieve sequential solidification, avoiding internal defects caused by insufficient feeding, and making the internal structure of the casting more dense; 4. The horizontally arranged cavity structure combined with the implicit riser design makes the flow and feeding of molten metal more controllable, reduces the complexity of the casting process, and improves the production stability and efficiency at the same time.

[0010] Furthermore, a reinforcing rib is integrally formed at the top of the hanging wire hook; a reinforcing rib cavity is arranged at the connection of the hanging wire hook cavity and the implicit riser for the formation of the reinforcing rib. The reinforcing rib can improve the strength of the hanging wire hook, improve the stress condition of the hanging wire hook, and improve the mechanical properties of the product.

[0011] Furthermore, it also includes an upper mold; U-shaped openings are arranged on one side of both the upper mold and the lower mold facing away from the hanging wire hook cavity, and the two U-shaped openings are spliced into a rectangular hole; a rear mold is inserted into the rectangular hole; a hanging wire fixed casting reserved hole mold and a U-shaped bolt casting reserved hole mold are arranged on the side of the rear mold close to the hanging wire hook cavity. Using the casting reserved hole for the U-shaped bolt hole on the product bottom plate is convenient for machining positioning and reduces the machining amount; using the casting reserved hole for the hanging wire fixed hole can also make the wall thickness at this place more uniform, avoid generating casting hot spots during cooling and solidification, and improve the density of the casting.

[0012] For a conventional mold, due to the vertical arrangement of its casting cavity, it occupies a large space, can only cast two products at the same time, and has a low qualified rate of castings and a low utilization rate. Based on this, a further improvement is as follows: the casting cavities are set as four horizontally spaced arrangements; the two middle casting cavities are symmetrically arranged, and the hook parts of their hanging wire hook cavities are opposite; the two outer casting cavities are symmetrically arranged, and the hook parts of their hanging wire hook cavities are opposite.

[0013] The beneficial effects of the present invention are:

[0014] The present invention changes the vertical arrangement of the hanging wire hook cavity to a horizontal arrangement, effectively avoiding the problem of reverse feeding of the riser by molten metal due to gravity during cooling and solidification, thus significantly reducing the shrinkage cavity and porosity defects in the back area of the hanging wire hook;

[0015] The present invention innovatively sets a blind riser outside the cavity of the suspension hook, constructs an independent feeding channel for the hot spot area during the cooling of the hook top; when the molten metal at the top of the suspension hook solidifies and shrinks, the molten metal in the blind riser can directly perform directional feeding on the hot spot part through the feeding power formed by the temperature gradient, solving the technical bottleneck that the traditional upper and lower pouring risers cannot effectively cover the hot spot area, and significantly reducing the shrinkage porosity hidden danger at the top of the hook;

[0016] Through the dual optimization of the cavity layout and the feeding structure, the suspension fixed hook cast by this mold can achieve sequential solidification, avoiding internal defects caused by insufficient feeding and making the internal structure of the casting more compact;

[0017] Through the combination of the horizontally arranged cavity structure and the blind riser design, the flow and feeding of the molten metal are more controllable, reducing the complexity of the casting process, while improving the production stability and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the drawings and embodiments.

[0019] Figure 1 is the structural schematic diagram of the present invention;

[0020] Figure 2 is the structural schematic diagram of another perspective of the present invention with the upper mold hidden;

[0021] Figure 3 is Figure 2 the enlarged view of part A in

[0022] Figure 4 is the structural schematic diagram of the traditional mold with the upper mold hidden;

[0023] Figure 5 is the structural schematic diagram of the traditional mold;

[0024] Figure 6 is the structural schematic diagram of another perspective of the traditional mold;

[0025] Figure 7 is the structural schematic diagram of the suspension fixed hook;

[0026] Figure 8 is the connection structural schematic diagram of the suspension fixed hook and the U-shaped bolt;

[0027] Figure 9 is the exploded view of the present invention;

[0028] Figure 10 is the exploded view of another perspective of the present invention;

[0029] In the figure: 1, lower die; 2, casting cavity; 3, upper die; 4, U-shaped opening; 5, rear die; 6, reserved hole die for fixing suspension wire casting; 7, reserved hole die for U-bolt casting; 21, cavity of suspension wire hook; 22, blind riser; 23, cavity of stiffening rib; 30, mounting seat; 40, suspension wire hook; 50, stiffening rib; 60, U-bolt hole; 70, fixing hole for suspension wire. Specific embodiments

[0030] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0031] The present invention discloses a gravity casting mold for a metal type of a suspension wire fixing hook, which is used for casting a suspension wire fixing hook. As Figure 7 shown, the suspension wire fixing hook includes a mounting seat 30 and a suspension wire hook 40 that are connected to each other. The top of the suspension wire hook 40 is connected with a stiffening rib 50 that is integrally formed and oblong. The stiffening rib 50 and the suspension wire hook 40 are coplanar. The stiffening rib 50 can improve the strength of the suspension wire hook 40, improve the stress condition of the suspension wire hook 40, and improve the mechanical properties of the product. Two U-bolt holes 60 are provided on the mounting seat 30. As Figure 8 shown, they are fixedly connected to the U-bolt holes and fixedly installed on a round pipe. A suspension wire fixing hole 70 is provided outside one of the U-bolt holes 60.

[0032] As Figures 1-3 , Figure 9 and Figure 10 shown, the mold includes a horizontally arranged lower die 1 and an upper die 3. A casting cavity 2 for forming a suspension wire fixing hook is formed between the lower die 1 and the upper die 3; the casting cavity 2 includes a cavity 21 of a suspension wire hook for forming the suspension wire hook 40.

[0033] Among them, the cavity 21 of the suspension wire hook is horizontally arranged, effectively avoiding the problem of reverse feeding of the riser by the metal liquid due to the gravity during cooling and solidification, thus significantly reducing the shrinkage cavity and porosity defects in the back region of the suspension wire hook 40.

[0034] A blind riser 22 is connected to the outside of the cavity 21 of the suspension wire hook, and the blind riser 22 is also horizontally arranged. By innovatively arranging the blind riser 22 outside the cavity 21 of the suspension wire hook, an independent feeding channel is constructed for the hot spot area during the cooling of the top of the hook; when the molten metal at the top of the suspension wire hook 40 solidifies and shrinks, the liquid metal in the blind riser 22 can directly perform directional feeding on the hot spot part through the feeding power formed by the temperature gradient, solving the technical bottleneck that the traditional upper and lower risers cannot effectively cover the hot spot area, and significantly reducing the porosity hidden danger at the top of the hook.

[0035] Through the dual optimization of the cavity layout and feeding structure, the hanging wire fixing hook cast by this mold can achieve sequential solidification, avoiding internal defects caused by insufficient feeding, and making the internal structure of the casting more dense. Moreover, through the horizontally arranged cavity structure combined with the design of the blind riser 22, the flow and feeding of the molten metal are more controllable, reducing the complexity of the casting process, while improving production stability and efficiency.

[0036] A reinforcing rib cavity 23 is provided at the connection between the hanging wire hook cavity 21 and the blind riser 22 for forming the reinforcing rib 50.

[0037] The casting cavities 2 are arranged in four horizontally spaced apart; the two middle casting cavities 2 are symmetrically arranged, and the hook parts of their hanging wire hook cavities 21 are opposite; the two outer casting cavities 2 are symmetrically arranged, and the hook parts of their hanging wire hook cavities 21 are opposite to each other. Compared with the traditional mold as Figure 4 described, since its casting cavities 2 are vertically arranged, it occupies a large space, can only cast two products at the same time, and the qualified rate of the casting is not high, and the utilization rate is low. The layout of the casting cavities 2 in this embodiment greatly improves the output without expanding the volume of the mold.

[0038] On one side of the upper mold 3 and the lower mold 1 facing away from the hanging wire hook cavity 21, U-shaped openings 4 are provided, and the two U-shaped openings 4 are spliced into a rectangular hole; a rear mold 5 is inserted into the rectangular hole; on one side of the rear mold 5 close to the hanging wire hook cavity 21, a hanging wire fixing casting reserved hole mold 6 and a U-shaped bolt casting reserved hole mold 7 are provided for forming the hanging wire fixing hole 70 and the U-shaped bolt hole 60 respectively. Using the U-shaped bolt casting reserved hole mold 7 for the U-shaped bolt hole 60 on the product bottom plate is convenient for machining positioning and reduces the machining amount; using the hanging wire fixing casting reserved hole mold 6 for the hanging wire fixing hole 70 can make the wall thickness of the casting more uniform, avoid generating casting hot spots during the cooling and solidification process, and improve the density of the casting.

[0039] As Figures 4-6 shown, a traditional mold includes an upper mold 3, a lower mold 1, a front mold and a rear mold 5, which is a front and rear core-pulling structure, with a complex structure and high requirements for the gravity casting tilting machine. The specific requirements are: 1. For front and rear side core-pulling, an oil cylinder needs to be set on each side for mold opening and closing; 2. Compared with rear core-pulling, the mold opening and closing stroke is larger for front and rear side core-pulling. And the mold in this embodiment is only composed of the upper mold 3, the lower mold 1 and the rear mold 5, with a simpler structure.

[0040] Inspired by the above ideal embodiments based on the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A gravity die casting mold for a wire fixing hook made of metal, which is used for casting a wire fixing hook. The wire fixing hook comprises a mounting seat (30) and a wire hanging hook (40) which are connected to each other. It is characterized in that: It includes a horizontally arranged lower die (1), and the lower die (1) is provided with a casting cavity (2) for forming a wire hanging fixing hook. The casting cavity (2) includes a wire hanging hook cavity (21) for forming the wire hanging hook (40). The wire hanging hook cavity (21) is horizontally arranged. A blind riser (22) is connected to the outside of the wire hanging hook cavity (21).

2. The gravity die casting mold for the suspension wire fixing hook according to claim 1, wherein: A integrally formed reinforcing rib (50) is connected to the top of the wire hanging hook (40). A reinforcing rib cavity (23) is provided at the connection between the wire hanging hook cavity (21) and the blind riser (22) for forming the reinforcing rib (50).

3. The gravity die casting mold for the wire fixing hook according to claim 2, characterized in that: It also includes an upper die (3). U-shaped openings (4) are provided on one side of the upper die (3) and the lower die (1) facing away from the wire hanging hook cavity (21), and the two U-shaped openings (4) are spliced into a rectangular hole. A rear die (5) is inserted into the rectangular hole. On one side of the rear die (5) close to the wire hanging hook cavity (21), a wire hanging fixing casting reserved hole die (6) and a U-shaped bolt casting reserved hole die (7) are provided.

4. The gravity die casting mold for the wire fixing hook according to claim 1, characterized in that: The casting cavities (2) are set to be four arranged at intervals in the horizontal direction. The two middle casting cavities (2) are symmetrically arranged, and the hook parts of their wire hanging hook cavities (21) are opposite. The two outer casting cavities (2) are symmetrically arranged, and the hook parts of their wire hanging hook cavities (21) are opposite to each other.

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