An external mold forming mold for a special-shaped conformal cooling water channel mold for casting

Abstract

The present invention discloses an outer mold forming mold for a special-shaped conformal cooling water channel mold for casting, including an upper sand mold and a combined forming frame. The upper sand mold covers the top of the combined forming frame. A sand cavity is provided at the top of the upper sand mold, and a mold forming cavity is provided at the top of the combined forming frame. An inner cavity sand mold is provided at the center of the mold forming cavity. A plurality of layers of independent conformal water channel sand cores are vertically arranged on the surrounding side walls of the inner cavity sand mold. A casting port for rain-type pouring along the periphery of the top of the mold forming cavity is provided in the upper sand mold. The present invention facilitates the rapid cooling and forming of the outer mold. The formed outer mold is internally provided with a plurality of layers of independent annular conformal cooling water channels, which facilitates the rapid and uniform heat dissipation and temperature reduction when the outer mold forms products. The rain-type casting port facilitates uniform casting and improves the feeding efficiency. The combined forming frame made of an overall metal material facilitates heat dissipation and disassembly.

Description

Technical Field

[0001] The present invention specifically relates to a forming mold with a follow-up cooling water channel outer mold, and specifically to an outer mold forming mold for a special-shaped conformal cooling water channel mold for casting. Background Technique

[0002] When a general cup-shaped product is formed, it requires the cooperation of an outer mold and an inner mold. The outer mold generally has a core cavity, and the inner mold is generally a core body. The core body is inserted into the core cavity to form a cup-shaped cavity for forming. Generally, the outer mold generally adopts a casting molding process. The casting mold of the outer mold is generally integrally formed by machining a metal block, with a long processing cycle and high consumables. Moreover, a single outer mold casting mold can only be applicable to a single specification of the outer mold. Different outer molds require different outer mold forming molds, resulting in a high production cost. In addition, the general cooling water channel inside the outer mold is a single channel, and the temperature drop difference on both sides of the inlet and outlet water is large, resulting in uneven cooling and easily affecting the forming effect.

[0003] During the casting process of the outer mold forming mold, a sand mold for feeding and venting is covered on the top of the mold cavity. Currently, the casting cavity of the general upper sand mold is mostly a single channel, and the casting liquid is directly poured into the cavity through the casting cavity, which affects the core sand or internal chills inside the cavity and easily leads to uneven casting. Generally, the feeding area of the riser is limited and the feeding effect is poor.

[0004] Therefore, in view of the above problems, we need an outer mold forming mold for a special-shaped conformal cooling water channel mold for casting. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] The purpose of the present invention is to provide an outer mold forming mold for a special-shaped conformal cooling water channel mold for casting, so as to solve the problems raised in the above background technique.

[0007] (2) Technical Solutions

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] An outer mold forming mold for a special-shaped conformal cooling water channel mold for casting, comprising an upper sand mold and a combined forming frame body. The upper sand mold covers the top of the combined forming frame body. A sand cavity is provided at the top of the upper sand mold, and a mold forming cavity is provided at the top of the combined forming frame body. An inner cavity sand mold is provided at the center of the mold forming cavity. A plurality of layers of independent conformal water channel sand cores are provided on the vertical side walls around the inner cavity sand mold. Metal core supports are provided on both sides of the conformal water channel sand cores. Inner chill irons are respectively provided at the four corners of the mold forming cavity. A casting port for rain watering around the top of the mold forming cavity is provided in the upper sand mold. The combined forming frame body is surrounded by multiple stacked detachable metal frames and a bottom plate. The conformal water channel sand core includes an annular water channel and side inlet and outlet water channels integrally connected to both sides of the annular water channel. The annular water channel is horizontally arranged around the outer side wall of the inner cavity sand mold. Water channel holes for the side inlet and outlet water channels to pass through are provided on the outer side wall of the combined forming frame body. The outer ends of the side inlet and outlet water channels pass through and block the water channel holes. The plurality of layers of conformal water channel sand cores provided form a cooling water channel cavity around the inner cavity sand mold. The detachable metal frame includes two oppositely arranged screw adjusting blocks and an inner clamping block perpendicularly arranged between the screw adjusting blocks and clamped between the screw adjusting blocks. The inner clamping block and the screw adjusting blocks are mutually buckled to form a vertically communicating frame body. An adjusting screw for bringing the screw adjusting blocks closer is provided between the two sides of the oppositely arranged screw adjusting blocks.

[0010] A further solution: The casting port is provided at the four peripheral edges of the inner bottom surface of the sand cavity, and the bottom of the casting port communicates with the top of the inner part of the mold forming cavity. Air vent holes communicating with the mold forming cavity are vertically downwardly provided at the four corners of the top surface of the sand cavity.

[0011] A further solution: The bottom plate includes a frame bottom plate, and a device plate is fixed at the center position of the top surface of the frame bottom plate. The detachable metal frame is integrally pressed on the top surface of the frame bottom plate, and the bottom circle of the inner side wall of the detachable metal frame is fitted and clamped around the outer side wall of the device plate.

[0012] A further solution: A plurality of inner sinking grooves for clamping the inner chill iron and the inner cavity sand mold are provided.

[0013] A further solution: A plurality of layers of metal core supports for supporting the inner cavity sand mold are provided in the vertical direction inside the mold forming cavity. A plurality of insertion holes are provided on the inner side wall of the combined forming frame body, and the metal core supports horizontally abut against the outer side wall of the inner cavity sand mold through the insertion holes.

[0014] A further solution: The horizontal cross-sectional area of the sand cavity is smaller than the horizontal cross-sectional area of the mold forming cavity.

[0015] Compared with the prior art, the present invention provides an outer mold forming mold for a special-shaped conformal cooling water channel mold for casting, having the following beneficial effects:

[0016] 1. Facilitate the rapid cooling and molding of the outer mold. The formed outer mold is internally provided with multiple layers of independent annular conformal cooling water channels, which is convenient for the rapid and uniform heat dissipation and temperature reduction when the outer mold forms products.

[0017] 2. The rain - type casting gate facilitates uniform casting and buffers the impact of the casting liquid on the inside of the mold cavity.

[0018] 3. The upper sand mold with multiple risers facilitates the rapid discharge of exhaust gas and improves the feeding efficiency.

[0019] 4. The integrally formed metal combination frame facilitates heat dissipation and disassembly, reduces the processing cost and cycle of half of the cavity, reduces the consumables of the cavity mold, can be used repeatedly, and can be flexibly assembled according to the cavity size. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the outer mold forming mold of the special - shaped conformal cooling water channel mold for casting.

[0021] Figure 2 It is an exploded view of the upper sand mold and the combination forming frame in the outer mold forming mold of the special - shaped conformal cooling water channel mold for casting.

[0022] Figure 3 It is a schematic structural diagram of the combination forming frame in the outer mold forming mold of the special - shaped conformal cooling water channel mold for casting.

[0023] Figure 4 It is a schematic internal structural diagram of the combination forming frame in the outer mold forming mold of the special - shaped conformal cooling water channel mold for casting.

[0024] Figure 5 It is a schematic structural diagram of the frame bottom plate in the outer mold forming mold of the special - shaped conformal cooling water channel mold for casting.

[0025] Wherein: upper sand mold 1, vent hole 10, casting gate 11, combination forming frame 2, screw adjusting block 20, inner clamping block 21, adjusting screw 22, frame bottom plate 23, device plate 24, internal chills 3, conformal water channel core 4, annular water channel 40, side inlet - outlet water channel 41, inner cavity sand mold 5, metal core support 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1

[0028] Please refer to Figures 1 to 4 Figures 1 to 4 , in the embodiment of the present invention, an outer mold forming mold for a special-shaped conformal cooling water channel mold for casting includes an upper sand mold 1 and a combined forming frame 2. The upper sand mold 1 covers the top of the combined forming frame 2. A sand cavity is provided at the top of the upper sand mold 1. A mold forming cavity is provided at the top of the combined forming frame 2. An inner cavity sand mold 5 is provided at the center of the mold forming cavity. A plurality of layers of independent conformal water channel sand cores 4 are vertically provided on the peripheral side walls of the inner cavity sand mold 5. Metal core supports 6 are provided on both sides of the conformal water channel sand core 4. Inner chill irons 3 are respectively provided at the four corners of the mold forming cavity. A casting port 11 for rain watering is provided along the periphery of the top of the mold forming cavity in the upper sand mold 1. The combined forming frame 2 is surrounded by a multi-layer stacked detachable metal frame and a bottom plate. The inner chill iron 3 can be made of a similar metal material with a melting point lower than that of the molten metal to be cast. For example, when casting aluminum alloy, the inner chill iron 3 is an aluminum rod; when casting steel parts, the inner chill iron 3 is an iron rod. It can absorb a large amount of heat of the molten metal during the casting process, thereby playing a role in quickly cooling the temperature in the mold and making the molten metal solidify evenly, avoiding the generation of shrinkage cavities after the molten metal solidifies. And after the inner chill iron 3 absorbs a certain amount of heat, it will melt itself, so as to ensure that the mold can be smoothly removed after cooling;

[0029]

[0029] The conformal water channel sand core 4 includes an annular water channel 40 and side inlet and outlet water channels 41 integrally connected to both sides of the annular water channel 40. The annular water channel 40 is horizontally arranged around the outer side wall of the inner cavity sand mold 5. Water channel holes for the side inlet and outlet water channels 41 to pass through are provided on the outer side wall of the combined forming frame 2. The outer ends of the side inlet and outlet water channels 41 pass through and block the water channel holes. The plurality of layers of conformal water channel sand cores 4 provided form a cooling water channel cavity around the inner cavity sand mold 5. The side inlet and outlet water channels 41 provided facilitate the inlet and outlet of water from the side wall of the combined forming frame 2 into and out of the annular water channel 40;

[0030]

[0030] The detachable metal frame includes two oppositely arranged screw adjusting blocks 20 and an inner clamping block 21 vertically arranged between the screw adjusting blocks 20 and clamped between the screw adjusting blocks 20. The inner clamping block 21 and the screw adjusting blocks 20 are mutually buckled into a vertically communicating frame. An adjusting screw 22 for bringing the screw adjusting blocks 20 closer is provided between the two sides of the oppositely arranged screw adjusting blocks 20. When the adjusting screw 22 is tightened, the screw adjusting blocks 20 move closer to each other, and then the screw adjusting blocks 20 tightly clamp the inner clamping block 21 in the middle, and the detachable metal frame forms a tight whole. The screw adjusting blocks 20 and the inner clamping block 21 are both made of metal materials, which can play a role in external cooling and facilitate the rapid cooling during the internal casting and forming of the mold.

[0031] The casting gate 11 is opened at the four peripheral edges of the inner bottom surface of the sand cavity. The bottom of the casting gate 11 communicates with the top of the mold forming cavity. At the four corners of the top surface of the sand cavity, venting openings 10 communicating with the mold forming cavity are vertically opened downward. During casting, the casting liquid is poured into the sand cavity and flows downward along the casting gate 11 at the bottom of the sand cavity to the mold forming cavity. The pouring form of pouring ensures that the mold forming cavity is more evenly filled with the casting liquid. The provided venting openings 10 facilitate the exhaust of waste gas and the feeding efficiency in the mold forming cavity.

[0032] Inside the mold forming cavity, multiple metal core supports 6 for supporting the inner cavity sand mold 5 are provided in the vertical direction. A plurality of insertion holes are opened on the inner side wall of the combined forming frame 2. The metal core supports 6 are horizontally abutted against the outer side wall of the inner cavity sand mold 5 through the insertion holes. In addition to being able to position and support the annular water channel 40, the metal core supports 6 can also be made of the same material as the internal chills 3, so as to play an auxiliary cooling role. In fact, according to the principle that metal cools and solidifies from the outside to the inside, even if the metal core supports 6 melt under the influence of the latent heat of the subsequent molten metal, since the metal surface has cooled and solidified, when the metal core supports 6 melt, the annular water channel 40 will not be displaced or deformed.

[0033] The working principle of the present invention is as follows: Before use, select a screw adjusting block 20 and an inner clamping block 21 with a matching specification according to the size of the mold cavity, and assemble them into a detachable metal frame. Then, stack the detachable metal frames vertically and clamp them on the conformal water channel sand core 4 to form a closed and complete mold forming cavity. Then, place the inner cavity sand mold 5 at the central position of the mold forming cavity. The inner cavity sand mold 5 is supported on the side by the metal core supports 6. The conformal water channel sand core 4 is arranged around the inner cavity sand mold 5 through the water channel holes on the combined forming frame 2. Then, stack the upper sand mold 1 as a whole on the top of the combined forming frame 2. Thus, the entire outer mold forming mold is assembled. During casting, the casting liquid is directly poured into the mold forming cavity of the combined forming frame 2 from the opening at the top of the sand cavity. The casting liquid is quickly cooled and shaped through the cooling effects of the internal chills 3, the conformal water channel sand core 4, and the combined forming frame 2 itself. After cooling and shaping, the combined forming frame 2 and the conformal water channel sand core 4 are removed, and the metal at the venting openings 10 and the casting gate 11 is cut off to separate the upper sand mold 1, then an outer mold with a cavity opened in the center and multiple layers of annular cooling water channels arranged around the inner wall of the cavity is obtained.

[0034] Embodiment 2

[0035] Please refer to Figure 5 , the difference between this embodiment and Embodiment 1 is:

[0036] The bottom plate includes a frame bottom plate 23, and a device plate 24 is fixed at the center position of the top surface of the frame bottom plate 23. The detachable metal frame is integrally pressed on the top surface of the frame bottom plate 23. The bottom circle of the inner side wall of the detachable metal frame fits and clamps around the outer side wall of the device plate 24. The provided frame bottom plate 23 and the device plate 24 together with the multi-layer detachable metal frame integrally enclose a mold forming cavity. This detachable cavity is convenient for disassembly and demolding, reducing the processing cost and material loss of the cavity mold. Moreover, both the combined forming frame body 2 as a whole and the frame bottom plate 23 are made of metal materials, which can play a role in external cooling and facilitate the rapid cooling during the internal casting molding of the mold.

[0037] A plurality of inner sinking grooves for clamping the internal chills 3 and the internal cavity sand mold 5 are formed on the device plate 24.

[0038] The horizontal cross-sectional area of the sand cavity is smaller than that of the mold forming cavity, mainly to ensure that during casting, the casting liquid will not drip onto the edge side of the top opening of the mold forming cavity.

[0039] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0040] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An outer mold forming mold for a special-shaped conformal cooling water channel mold for casting, comprising an upper sand mold (1) and a combined forming frame (2), wherein the upper sand mold (1) covers the top of the combined forming frame (2), a sand cavity is formed at the top of the upper sand mold (1), and a mold forming cavity is formed at the top of the combined forming frame (2), and is characterized in that, There is an inner cavity sand mold (5) at the center of the mold forming cavity. There are multiple layers of independent conformal water channel sand cores (4) arranged vertically on the peripheral side walls of the inner cavity sand mold (5). Metal core supports (6) are arranged on both sides of the conformal water channel sand cores (4). Inner chill irons (3) are respectively arranged at the four corners of the mold forming cavity. There is a casting port (11) in the upper sand mold (1) for rain pouring along the periphery of the top of the mold forming cavity. The combined forming frame body (2) is enclosed by multiple layers of stacked detachable metal frames and a bottom plate. The conformal water channel sand core (4) includes an annular water channel (40) and side inlet and outlet water channels (41) integrally connected to both sides of the annular water channel (40). The annular water channel (40) is horizontally arranged around the outer side wall of the inner cavity sand mold (5). Water channel holes for the side inlet and outlet water channels (41) to pass through are formed on the outer side wall of the combined forming frame body (2). The outer ends of the side inlet and outlet water channels (41) pass through and block the water channel holes. The multiple layers of conformal water channel sand cores (4) arranged form a cooling water channel cavity around the inner cavity sand mold (5). The detachable metal frame includes two oppositely arranged screw adjusting blocks (20) and an inner clamping block (21) arranged vertically between the screw adjusting blocks (20) and perpendicular to the screw adjusting blocks (20). The inner clamping block (21) and the screw adjusting blocks (20) are mutually buckled to form a vertically connected frame body. An adjusting screw (22) for bringing the screw adjusting blocks (20) closer is arranged between the two sides of the oppositely arranged screw adjusting blocks (20).

2. The outer mold forming mold of a special-shaped conformal cooling water channel mold for casting according to claim 1, characterized in that: The casting port (11) is opened at the four peripheral edges of the bottom surface of the sand cavity. The bottom of the casting port (11) communicates with the top of the mold forming cavity. Gas vent holes (10) communicating with the mold forming cavity are vertically opened downward at the four corners of the top surface of the sand cavity.

3. The outer mold forming mold of a special-shaped conformal cooling water channel mold for casting according to claim 1, characterized in that: The bottom plate includes a frame body bottom plate (23). A device plate (24) is fixed at the center position of the top surface of the frame body bottom plate (23). The detachable metal frame is integrally pressed on the top surface of the frame body bottom plate (23). The bottom circle of the inner side wall of the detachable metal frame fits and clamps around the outer side wall of the device plate (24).

4. The outer mold forming mold of the special-shaped conformal cooling water channel mold for casting according to any one of claims 1-3, characterized in that: Multiple layers of metal core supports (6) for supporting the inner cavity sand mold (5) are arranged vertically inside the mold forming cavity. Multiple insertion holes are formed on the inner side wall of the combined forming frame body (2). The metal core supports (6) horizontally abut against the outer side wall of the inner cavity sand mold (5) through the insertion holes.

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