A mold for making a semi-solid screen support

Abstract

The application discloses a mold for manufacturing a semi-solid screen support, which comprises a die casting machine plate, a sprue bush assembly and a mold blank are arranged on the inner side of the die casting machine plate, a mold core is inlaid in the mold blank, a groove body which is in communication with each other is arranged at the center position of the mold blank and the center position of the mold core, and the groove body is matched with the sprue bush assembly; the sprue bush assembly comprises a protruding nozzle fixing assembly, the nozzle fixing assembly and the die casting machine plate form a channel which is in communication with each other and extends into the mold core, the channel is used for placing a injection nozzle so that the injection nozzle extends into the mold core, the mold is modularized, the hot runner design in the prior art is overcome, the pouring equipment is directly connected to the mold cavity, directly contacts the product, the material of the sprue is saved, the cost is greatly reduced, semi-solid center pouring is realized, the sand hole problem of the pouring position of the appearance surface of the oil injection appearance part is improved, and the die casting quality of the product is improved.

Description

Technical Field

[0001] This invention relates to the field of magnesium alloy die casting technology, and in particular to a mold for manufacturing semi-solid screen brackets. Background Technology

[0002] Thiomolding, a semi-solid die-casting technology for magnesium alloys, originated in the United States in the late 1980s. The material used differs from the magnesium ingots used in high-pressure casting; it primarily consists of non-dendritic magnesium alloy particles. This technology involves reheating these non-dendritic magnesium alloy particles to a solid-liquid coexistence zone. Through a screw-driven shearing and stirring process similar to plastic injection molding, a semi-solid spherical crystalline slurry is formed, which is then injected into a mold cavity to create the magnesium alloy metal workpiece. The entire manufacturing process, from melting the magnesium alloy particles, shearing and stirring to form the semi-solid slurry, and then die-casting, involves no contact with air except within the mold cavity. Thiomolding of magnesium alloys has the following characteristics: good mechanical properties due to the semi-solid spherical crystalline structure; low material temperature; low thermal stress; long mold life; and fewer shrinkage cavities in the product. The porosity is low, and the semi-solid flow is dominated by viscous liquid laminar flow. Compared with the jet atomization of high pressure casting, there is less air entrapment and more exhaust. The porosity is low and the pores are relatively concentrated. High pressure casting has high porosity, but the pores are relatively dispersed and fine.

[0003] Therefore, existing die-casting molds are suitable for high-pressure cold chamber die casting. The sprue bushing is usually very large, and the sprue is usually poured from the side of the product. The size of the remaining sprue is usually very large. However, most semi-solid die-casting products do not have such a large space reserved, which makes it impossible to change most products to semi-solid center sprue die casting. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention aims to provide a mold for manufacturing semi-solid screen brackets, enabling semi-solid center injection and improving product die-casting quality.

[0005] In view of this, a mold for manufacturing a semi-solid screen bracket is provided, including a die-casting machine plate, a sprue sleeve assembly and a mold blank are provided on the inner side of the die-casting machine plate, a mold core is embedded in the mold blank, and a groove is provided at the center of the mold blank and the center of the mold core, the groove matching the sprue sleeve assembly; the sprue sleeve assembly includes a protruding nozzle fixing assembly, the nozzle fixing assembly and the die-casting machine plate forming a channel that communicates with each other and extends into the mold core; the channel is used to place the injection nozzle so that it extends into the mold core.

[0006] Further, the nozzle fixing assembly comprises a nozzle sleeve, a nozzle fixing sleeve is arranged in the nozzle sleeve, a top surface of the nozzle fixing sleeve is fixedly connected with a cover plate, one side of the cover plate away from the nozzle fixing sleeve is provided with a protruding structure, and the protruding structure is connected with the mold core.

[0007] Further, a first through hole is arranged on the top surface of the nozzle fixing sleeve, and a second through hole is arranged on the top surface of the protruding structure, wherein the inner diameter of the second through hole is smaller than the inner diameter of the first through hole.

[0008] Further, a nozzle positioning sleeve is embedded on the mold core, and the protruding structure is tightly inserted with the nozzle positioning sleeve.

[0009] Further, a bottom surface of the cover plate is provided with an annular groove, a copper ring is arranged in the annular groove, and the copper ring abuts against the nozzle fixing sleeve.

[0010] Further, the nozzle sleeve assembly further comprises a nozzle sleeve fixing plate, a through hole is arranged on the nozzle sleeve fixing plate, and the nozzle fixing assembly is embedded on the through hole.

[0011] Further, the nozzle fixing assembly further comprises a nozzle sleeve shell, the nozzle sleeve shell covers the cover plate, and the nozzle sleeve is screw-connected on the nozzle sleeve fixing plate.

[0012] Further, both ends of the nozzle sleeve fixing plate are respectively connected with fixed side plates, and the two fixed side plates are fixed on the die casting machine plate.

[0013] Further, the groove body comprises a circular groove body in the middle and strip-shaped groove bodies respectively extending to both sides.

[0014] Further, the nozzle fixing assembly is placed in the circular groove body, and the two fixed side plates are respectively placed in the two strip-shaped groove bodies.

[0015] The application has the beneficial effects that the embodiment of the application provides a mold for manufacturing a semi-solid screen support, which comprises a die casting machine plate, a sprue bushing assembly and a mold blank are arranged on the inner side of the die casting machine plate, a mold core is inlaid in the mold blank, a groove body is arranged at the center position of the mold blank and the center position of the mold core and is in communication with each other and matches the sprue bushing assembly, the sprue bushing assembly comprises a protruding nozzle fixing assembly, the nozzle fixing assembly and the die casting machine plate form a channel in communication with each other and extending into the mold core, the channel is used for placing a injection nozzle to extend into the mold core, the mold is modularly designed, the hot runner design in the prior art is overcome, the high-pressure cold chamber die casting is changed into semi-solid die casting, the product side pouring is changed into product center pouring, the pouring equipment is directly connected to the mold cavity and directly contacts the product, the redundant sprue material is saved, the material utilization rate is improved, the cost is greatly reduced, the semi-solid center pouring is realized, the sand hole problem of the appearance pouring of the appearance part of the oil injection is improved, and the die casting quality of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.

[0017] Figure 1 The overall structure of the mold for manufacturing a semi-solid screen support provided by the embodiment of the application is shown in a sectional view.

[0018] Figure 2 The explosion view of the sprue bushing assembly of the mold for manufacturing a semi-solid screen support provided by the embodiment of the application is shown.

[0019] Figure 3 The explosion view of the sprue bushing assembly and the mold blank of the mold for manufacturing a semi-solid screen support provided by the embodiment of the application is shown.

[0020] Figure 4 The structure schematic diagram of the sprue bushing assembly of the mold for manufacturing a semi-solid screen support provided by the embodiment of the application installed on the die casting machine plate is shown.

[0021] Figure 5 The explosion view of the connection of the sprue bushing assembly and the sprue positioning sleeve of the mold for manufacturing a semi-solid screen support provided by the embodiment of the application is shown.

[0022] Figure 6 The rear view of the cover plate of the mold for manufacturing a semi-solid screen support provided by the embodiment of the application is shown.

[0023] Figure: 100, injection nozzle; 200, channel; 1, die casting machine plate; 2, nozzle sleeve assembly; 20, nozzle fixing assembly; 201, nozzle sleeve; 202, nozzle fixing sleeve; 203, cover plate; 2030, annular groove; 2031, copper ring; 204, protruding structure; 205, first through hole; 206, second through hole; 207, nozzle sleeve shell;

[0024] 21, nozzle sleeve fixing plate; 22, fixed side plate;

[0025] 3, die; 4, die core; 40, nozzle positioning sleeve; 5, groove; 50, circular groove; 51, strip-shaped groove. DETAILED DESCRIPTION

[0026] The embodiment of the present application provides a mold for manufacturing a semi-solid screen support, realizes semi-solid center pouring, and improves product die casting quality.

[0027] In order to make the invention purposes, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the following described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0028] The technical solutions of the present application will be further described in combination with the drawings and through specific embodiments.

[0029] Embodiment:

[0030] Since the die casting mold of the prior art is suitable for high-pressure cold chamber die casting, the nozzle sleeve for pouring is usually large, pouring is generally performed from the side of the product, and the size of the residual nozzle is usually large. However, most of the semi-solid die casting products do not have such a large space reserved, and semi-solid die casting cannot be realized. Therefore, a mold for manufacturing a semi-solid screen support is developed.

[0031] As shown in Figures 1-6 , the mold comprises a nozzle sleeve, a nozzle sleeve fixing plate, a nozzle sleeve shell, a nozzle sleeve fixing sleeve, a cover plate, a nozzle sleeve fixing assembly, and a nozzle sleeve. Figure 1The utility model provides a kind of die for making semi-solid screen support, and provide a kind of die for making semi-solid screen support, including die casting machine plate 1, the die casting machine plate 1 inside is equipped with sprue bush assembly 2 and die blank 3, the die blank 3 is inlayed with mould core 4, the center position of the die blank 3 and the center position of the mould core 4 are equipped with the groove 5 of intercommunication, the groove 5 and the sprue bush assembly 2 are matched;Sprue bush assembly 2 includes protruding nozzle fixed assembly 20, and the nozzle fixed assembly 20 and the die casting machine plate 1 form the channel 200 of intercommunication and extend to the mould core 4;The channel 200 is used to place injection nozzle 100 so that it extends to the mould core 4.

[0032] In specific embodiments, by the structure improvement of die, first set up sprue bush assembly 2 on die casting machine plate 1, sprue bush assembly 2 is connected by nozzle fixed assembly 20 and die blank 3 and mould core 4, by the insertion of nozzle fixed assembly 20 and groove 5, so that nozzle fixed assembly 20 and mould core 4 are communicated, so that injection nozzle 100 reaches mould product cavity by channel 200 and carries out pouring, modularization of die is not needed, hot runner design can be saved, pouring equipment can be directly connected to mould cavity, directly contact with product, save redundant sprue material, reduce cost, at the same time, high-pressure cold chamber die casting is changed to semi-solid die casting, product side pouring is changed to product center pouring, improve the sand hole problem of oil injection appearance part appearance surface pouring, improve product production quality.

[0033] Further, the nozzle fixed assembly 20 includes a sprue bush 201, the sprue bush 201 is provided with a nozzle fixing sleeve 202, the top surface of the nozzle fixing sleeve 202 is fixedly connected with a cover plate 203, one side of the cover plate 203 away from the nozzle fixing sleeve 202 is provided with a protruding structure 204, and the protruding structure 204 is connected with the mould core 4.

[0034] Specifically, the nozzle fixed assembly 20 includes a sprue bush 201, the sprue bush 201 is provided with a nozzle fixing sleeve 202, the top surface of the nozzle fixing sleeve 202 is fixedly connected with a cover plate 203, one side of the cover plate 203 away from the nozzle fixing sleeve 202 is provided with a protruding structure 204, and the protruding structure 204 is connected with the mould core 4.

[0035] Further, the top surface of the nozzle fixing sleeve 202 is provided with a first through hole 205, and the top surface of the protruding structure 204 is provided with a second through hole 206, and the inner diameter of the second through hole 206 is smaller than the inner diameter of the first through hole 205.

[0036] Specifically, by setting the second through hole 206 on the top surface of the protruding structure 204 on the cover plate 203 smaller than the inner diameter of the first through hole 205, the pouring gate is further reduced, and the protruding structure 204 is connected with the mold core 4, so that the size of the water gap after the product is pressure cast is reduced, realizing center pouring. In addition, in the process of manufacturing similar appearance pressure castings, if there is a small space, for example, a 51mm space, in the product, the mold can be designed using the scheme of the embodiment.

[0037] Further, the mold core 4 is embedded with a gate positioning sleeve 40, and the protruding structure 204 and the gate positioning sleeve 40 are tightly inserted.

[0038] Specifically, the protruding structure 204 is fixedly connected with the gate positioning sleeve 40, which can be inserted, so as to tightly connect the gate sleeve assembly 2 and the mold core 4.

[0039] Further, the bottom surface of the cover plate 203 is provided with an annular groove 2030, and a copper ring 2031 is arranged in the annular groove 2030. The copper ring 2031 abuts against the nozzle fixed sleeve 202.

[0040] Specifically, the annular groove 2030 is arranged on the bottom surface of the cover plate 203. The material of the fixed cover plate 203 is steel. The copper ring 2031 is placed in the annular groove 2030, forming a steel ring at the innermost part, a copper ring 2031 around the steel ring, and the copper ring 2031 being a consumable material. The nozzle fixed sleeve 202 is sleeved on the nozzle 100. The top surface of the nozzle fixed sleeve 202 directly contacts the copper ring 2031. The semi-solid magnesium alloy material is pressed into the product cavity through the innermost steel ring of the fixed cover plate 203. According to the principle of thermal expansion and cold contraction, the copper ring directly contacting the top surface of the nozzle fixed sleeve 202 is soft and consumable, so that the service life of the steel fixed cover plate 203 is prolonged. Only the copper ring with low replacement cost needs to be replaced, thereby reducing the cost.

[0041] Further, the gate sleeve assembly 2 further comprises a gate sleeve fixing plate 21, and a through hole is formed in the gate sleeve fixing plate 21. The nozzle fixed assembly 20 is embedded in the through hole.

[0042] Specifically, the nozzle fixed assembly 20 is installed through the gate sleeve fixing plate 21, and the nozzle fixed assembly 20 is fixed by installing the gate sleeve 201 in the through hole.

[0043] Further, the nozzle fixed assembly 20 further comprises a gate sleeve shell 207, and the gate sleeve shell 207 covers the cover plate 203 and the gate sleeve 201. The gate sleeve 201 is screw-connected on the gate sleeve fixing plate 21.

[0044] Specifically, the cover plate 203 and the gate sleeve 201 are fixed through the gate sleeve shell 207.

[0045] Further, the two ends of the sprue bush fixing plate 21 are respectively connected with fixed side plates 22, and the two fixed side plates 22 are fixed on the die casting machine plate 1.

[0046] Specifically, the fixed side plates 22 facilitate the installation of the sprue bush fixing plate 21 on the die casting machine plate 1, and since the sizes of the two fixed side plates 22 are greater than those of the mold core 4, the sprue bush assembly 2 can be conveniently disassembled from the mold core 4.

[0047] Further, the groove 5 includes a middle circular groove 50 and strip-shaped grooves 51 extending to the two sides respectively.

[0048] Specifically, the groove 5 includes the middle circular groove 50 and the strip-shaped grooves 51 on the two sides, and the shape of the sprue bush assembly 2 matches that of the groove 5, facilitating the installation.

[0049] Specifically, the nozzle fixing assembly 20 is placed in the circular groove 50, and the two fixed side plates 22 are respectively placed in the two strip-shaped grooves 51.

[0050] In addition, the sprue bush shell 207 and the sprue bush fixing plate 21 are fixed in a threaded connection, thereby stably installing the sprue bush assembly, and the cover plate 203 and the top surface of the sprue bush 22 are fixed in a threaded connection.

[0051] In summary, the embodiment of the present application provides a mold for manufacturing a semi-solid screen support, which comprises a die casting machine plate, a sprue bush assembly and a mold blank are arranged on the inner side of the die casting machine plate, a mold core is embedded in the mold blank, a groove that is in communication with the mold core is arranged at the center position of the mold blank and the center position of the mold core, and the groove and the sprue bush assembly match each other; the sprue bush assembly comprises a protruding nozzle fixing assembly, the nozzle fixing assembly and the die casting machine plate form a channel that is in communication and extends into the mold core, and the channel is used for placing a injection nozzle so as to extend into the mold core. The mold is modularly designed, overcomes the hot runner design in the prior art, makes the pouring equipment directly connected to the mold cavity and directly contacted with the product, saves the material of the sprue, greatly reduces the cost, realizes the semi-solid center pouring, improves the sand hole problem at the pouring position of the appearance surface of the oil injection appearance part, and improves the die casting quality of the product.

[0052] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A mold for manufacturing a semi-solid screen bracket, characterized in that, The die casting machine includes a die casting machine plate (1), on the inner side of which a sprue sleeve assembly (2) and a mold blank (3) are provided. A mold core (4) is embedded in the mold blank (3). A groove (5) is provided at the center of the mold blank (3) and at the center of the mold core (4). The groove (5) matches the sprue sleeve assembly (2). The sprue sleeve assembly (2) includes a protruding nozzle fixing assembly (20). The nozzle fixing assembly (20) and the die casting machine plate (1) form a channel (200) that is interconnected and extends into the mold core (4). The channel (200) is used to place the injection nozzle (100) so that it extends into the mold core (4). The nozzle fixing assembly (20) includes a sprue sleeve (201), a nozzle fixing sleeve (202) is provided inside the sprue sleeve (201), a cover plate (203) is fixedly connected to the top surface of the nozzle fixing sleeve (202), and a protruding structure (204) is provided on the side of the cover plate (203) away from the nozzle fixing sleeve (202), and the protruding structure (204) is connected to the mold core (4); The nozzle fixing sleeve (202) has a first through hole (205) on its top surface and a second through hole (206) on its top surface. The inner diameter of the second through hole (206) is smaller than the inner diameter of the first through hole (205).

2. The mold for manufacturing a semi-solid screen bracket according to claim 1, characterized in that, The mold core (4) is fitted with a gate positioning sleeve (40), and the protruding structure (204) and the gate positioning sleeve (40) are tightly connected.

3. The mold for manufacturing a semi-solid screen bracket according to claim 1, characterized in that, The bottom surface of the cover plate (203) is provided with an annular groove (2030), and a copper ring (2031) is provided in the annular groove (2030). The copper ring (2031) abuts against the nozzle fixing sleeve (202).

4. The mold for manufacturing a semi-solid screen bracket according to claim 1, characterized in that, The sprue sleeve assembly (2) also includes a sprue sleeve fixing plate (21), on which a through hole is provided, and the nozzle fixing assembly (20) is embedded in the through hole.

5. The mold for manufacturing a semi-solid screen bracket according to claim 4, characterized in that, The nozzle fixing assembly (20) also includes a sprue sleeve housing (207), which covers the cover plate (203), and the sprue sleeve (201) is threadedly connected to the sprue sleeve fixing plate (21).

6. The mold for manufacturing a semi-solid screen bracket according to claim 4, characterized in that, The two ends of the gate sleeve fixing plate (21) are respectively connected to the fixing side plates (22), and the two fixing side plates (22) are fixed on the die casting machine plate (1).

7. The mold for manufacturing a semi-solid screen bracket according to claim 1, characterized in that, The trough (5) includes a central circular trough (50) and strip-shaped troughs (51) extending to both sides.

8. The mold for manufacturing a semi-solid screen bracket according to claim 7, characterized in that, The nozzle fixing assembly (20) is placed inside the circular groove (50), and the two fixing side plates (22) are respectively placed inside the two strip grooves (51).

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