Exhaust structure of a housing mold

Abstract

The utility model discloses a kind of exhaust structure of shell mould, including fixed mould plate and movable mould plate, fixed mould plate and movable mould plate are enclosed to form the cavity for forming shell product after moulding, movable exhaust insert is equipped in fixed mould plate inside corresponding cavity edge, installation slot that is adapted with movable exhaust insert is opened in fixed mould plate inside, movable exhaust insert moves along the depth direction of installation slot;Fixed mould plate is equipped with negative pressure exhaust device on the side away from cavity, negative pressure exhaust device is equipped with negative pressure interface and exhaust main passage, one end of exhaust main passage is communicated with movable exhaust insert, the other end is connected with negative pressure interface, for gas export to negative pressure interface;Exhaust main passage is equipped with gas-permeable component inside.The utility model solves the problem of aluminum chip blockage by movable exhaust insert, keeps exhaust passage unobstructed;Negative pressure exhaust device realizes active air extraction, improves cavity gas discharge efficiency;Gas-permeable component filters gas impurities, further avoids exhaust blockage.

Description

Technical Field

[0001] This utility model relates to, but is not limited to, the field of die-casting mold technology, and in particular to a venting structure for a shell mold. Background Technology

[0002] Traditional die-casting molds often employ fixed venting blocks or inserts. During actual production, aluminum shavings are generated from the flow of molten metal during die casting. These shavings tend to accumulate in the venting grooves of the fixed venting blocks, leading to blockages and poor venting over time. Poor venting prevents gases from escaping from the mold cavity, resulting in defects such as porosity and undercasting in the shell product, and in severe cases, even product scrap. Furthermore, traditional venting structures rely solely on natural gas overflow for venting. However, the high-pressure environment inside the mold cavity during die casting cannot be quickly expelled by natural overflow. This not only affects the molding accuracy and surface quality of the shell product but also prolongs the molding cycle and reduces production efficiency. Utility Model Content

[0003] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims. This invention aims to at least solve one of the technical problems existing in the prior art. To this end, embodiments of this invention provide a venting structure for a shell mold, which can effectively solve the problems of venting blockage and low venting efficiency in traditional die-casting molds, thereby improving the molding quality and production efficiency of shell products.

[0004] This utility model embodiment provides a venting structure for a shell mold, including a fixed template and a movable template. After the fixed template and the movable template are closed, they form a cavity for molding a shell product. A movable venting insert is provided on the inner side of the fixed template corresponding to the edge of the cavity. An installation groove adapted to the movable venting insert is opened inside the fixed template, and the movable venting insert moves along the depth direction of the installation groove. A negative pressure venting device is provided on the side of the fixed template away from the cavity. The negative pressure venting device is provided with a negative pressure interface and a main venting channel. One end of the main venting channel is connected to the movable venting insert, and the other end is connected to the negative pressure interface for exporting gas to the negative pressure interface. A venting component is provided inside the main venting channel.

[0005] According to some embodiments of the present invention, the movable venting insert is fitted against the inner wall of the cavity on the side facing the cavity, and a return spring is provided between the end of the movable venting insert away from the cavity and the bottom of the mounting groove.

[0006] According to some embodiments of the present invention, the movable exhaust insert has an exhaust branch channel inside, one end of which extends to the mating surface between the movable exhaust insert and the cavity, and the other end is connected to the main exhaust channel.

[0007] According to some embodiments of the present invention, the breathable component is embedded in the main exhaust channel and located between the movable exhaust insert and the negative pressure interface.

[0008] According to some embodiments of the present invention, the movable exhaust insert is provided with sliders on both outer walls, and the inner wall of the mounting groove is provided with a sliding groove corresponding to the slider. The slider and the sliding groove are slidably engaged to guide the movable exhaust insert to move along the depth direction of the mounting groove.

[0009] According to some embodiments of the present invention, the end face of the movable venting insert facing the cavity is provided with a cleaning protrusion, and the cleaning protrusion extends along the length direction of the movable venting insert.

[0010] According to some embodiments of this utility model, the inner diameter of the exhaust branch channel gradually increases from the end near the cavity to the end near the main exhaust channel, forming a flared structure.

[0011] According to some embodiments of this utility model, when the fixed template and the moving template are closed, the inner sidewall of the moving template presses against the movable venting insert, so that the movable venting insert compresses the reset spring and retracts into the mounting groove.

[0012] According to some embodiments of the present invention, the fixed template has a guide post on its end face facing the moving template, and the moving template has a guide hole corresponding to the guide post, with the guide post inserted into the guide hole.

[0013] The present invention has at least the following beneficial effects: the movable venting insert can move relative to the mounting groove of the fixed template, and can scrape off the aluminum shavings attached to the edge of the cavity when the mold is opened, thereby avoiding the accumulation of aluminum shavings that block the venting channel and ensuring the long-term smooth operation of the venting system; the negative pressure venting device forms an active air intake mechanism through the main venting channel and the negative pressure interface, which can quickly extract the high-pressure gas in the cavity, thereby improving the venting efficiency, reducing the residual time of gas in the cavity, and thus improving the molding quality of the shell product; the venting component in the main venting channel can filter fine impurities in the gas, while ensuring smooth gas passage, further preventing the venting channel from being blocked by the accumulation of impurities, and maintaining the stability of the venting system.

[0014] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0016] Figure 1 This is an overall schematic diagram of the venting structure of the shell mold provided in one embodiment of the present utility model; Figure 2 This is a schematic diagram of the internal venting structure of a shell mold provided in one embodiment of the present invention; Figure 3 This is a schematic diagram of exhaust provided in one embodiment of the present invention; Figure 4 This is a schematic diagram of the mold closing of the shell mold provided in one embodiment of the present invention; Reference numerals: Fixed template 110; Moving template 120; Movable exhaust insert 210; Mounting groove 220; Negative pressure interface 230; Main exhaust channel 240; Branch exhaust channel 310. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0022] See Figure 1 , Figure 1 This is a schematic diagram of the overall venting structure of a shell mold according to an embodiment of the present invention. The venting structure includes a fixed template 110 and a movable template 120. After the fixed template 110 and the movable template 120 are closed, they enclose a cavity for molding the shell product. The shape of the cavity perfectly matches the shape of the shell product to be molded. In other words, the portion of the fixed template 110 corresponding to the cavity and the portion of the movable template 120 corresponding to the cavity together constitute the core structure of the mold. Its core function is to achieve the molding of the shell product by enclosing and forming the cavity.

[0023] Furthermore, combined Figure 2 As shown, a movable venting insert 210 is provided on the inner side of the fixed template 110 corresponding to the edge of the cavity. The shape of the movable venting insert 210 matches the contour of the cavity edge, ensuring that the sealing of the cavity will not be affected after mold closing. An installation groove 220 adapted to the movable venting insert 210 is provided inside the fixed template 110. The movable venting insert 210 can move along the depth direction of the installation groove 220. Specifically, the movable venting insert 210 can move flexibly within the installation groove 220 in the direction close to or away from the cavity. A negative pressure venting device is provided on the side of the fixed template 110 away from the cavity. The negative pressure venting device includes a negative pressure interface 230 and a main venting channel 240. The negative pressure interface 230 can be used to connect to an external negative pressure source (such as a negative pressure generator). The main venting channel 240 is a channel opened inside the fixed template 110. One end of it is connected to the inside of the movable venting insert 210, and the other end is fixedly connected to the negative pressure interface 230. It can be used to exhaust the gas in the cavity to the negative pressure interface 230.

[0024] Furthermore, a venting component is provided inside the main exhaust channel 240. The venting component can be made of porous ceramic material, and its outer diameter is adapted to the inner diameter of the main exhaust channel 240, and it fits tightly against the inner wall of the main exhaust channel 240.

[0025] Preferably, both the fixed template 110 and the moving template 120 can be made of H13 hot work die steel to give the structure good high temperature resistance and wear resistance.

[0026] In one feasible embodiment, the side of the movable venting insert 210 facing the cavity is completely fitted with the inner wall of the cavity when the mold is closed, ensuring the sealing of the cavity after mold closing and preventing molten metal leakage; a return spring is provided between the end of the movable venting insert 210 away from the cavity and the bottom of the mounting groove 220, and the return spring can be used to push the movable venting insert 210 towards the cavity when the mold is opened.

[0027] In a feasible embodiment, one end of the return spring can be fixedly connected to the end face of the movable exhaust insert 210 by welding, and the other end can be fixedly connected to the bottom of the mounting groove 220 by snap-fit, ensuring that the return spring will not fall off during long-term compression and rebound.

[0028] In one feasible embodiment, the movable venting insert 210 has an internal venting branch channel 310. One end of the venting branch channel 310 extends through to the mating surface between the movable venting insert 210 and the cavity, and the other end extends to the end face of the movable venting insert 210 away from the cavity, communicating with the main venting channel 240. This channel guides gas from the venting branch channel 310 into the main venting channel 240, ensuring that gas in the cavity can smoothly pass through the venting branch channel 310 into the main venting channel 240. Figure 3 As shown, during molding, the compressed high-pressure air in the cavity first flows into the main exhaust channel 240 through the exhaust branch channel 310, and then is actively discharged to the outside of the cavity under the action of the negative pressure device, thereby achieving active and efficient exhaust.

[0029] In one feasible embodiment, the exhaust branch channel 310 is a through channel and is evenly distributed along the length direction of the movable exhaust insert 210.

[0030] In one feasible embodiment, the venting component is embedded in the main exhaust channel 240 and located between the movable exhaust insert 210 and the negative pressure port 230. The venting component is used to allow gas to pass through and block impurities from entering the negative pressure port 230.

[0031] In one feasible embodiment, a high-temperature resistant sealing ring is provided between the two ends of the venting component and the inner wall of the main exhaust channel 240 to further enhance the sealing performance and prevent gas leakage from the gap.

[0032] In one feasible embodiment, the movable exhaust insert 210 has symmetrically arranged sliders on both outer walls, and the inner wall of the mounting groove 220 has a groove corresponding to the slider. The slider and the groove slide in a sliding fit to guide the movable exhaust insert 210 to move smoothly along the depth direction of the mounting groove 220. Specifically, the cross-sectional shape of the groove is adapted to the slider, and the length direction of the groove is consistent with the moving direction of the movable exhaust insert 210. The slider is embedded in the groove, which can limit the movement trajectory of the movable exhaust insert 210 and prevent it from deviating.

[0033] In one feasible embodiment, the end face of the movable venting insert 210 facing the cavity is provided with cleaning protrusions. The cleaning protrusions extend along the length direction of the movable venting insert 210 and are spaced apart along the width direction of the movable venting insert 210. They are mainly used to clean residual impurities at the edge of the cavity when the movable venting insert 210 moves.

[0034] In one feasible embodiment, the inner diameter of the exhaust branch channel 310 gradually increases from the end near the cavity to the end near the exhaust main channel 240, forming a flared structure to reduce the flow resistance of gas from the cavity into the exhaust main channel 240.

[0035] In one feasible embodiment, the inner wall of the flared structure is a smoothly transitioning conical surface. This structural design can reduce the flow resistance of gas in the exhaust branch channel 310, accelerate the gas discharge speed, and further improve the exhaust efficiency.

[0036] In a feasible embodiment, when the fixed template 110 and the movable template 120 are closed, the inner sidewall of the movable template 120 will contact the end face of the movable venting insert 210 and apply uniform pressure. Under the action of the pressure, the movable venting insert 210 moves smoothly into the mounting groove 220, while compressing the return spring until the movable venting insert 210 is completely retracted into the mounting groove 220. At this time, the side of the movable venting insert 210 facing the cavity remains flush with the inner wall of the cavity, ensuring the integrity of the inner wall of the cavity and not affecting the product molding.

[0037] In one feasible embodiment, the end face of the fixed template 110 facing the movable template 120 is provided with a guide post, and the movable template 120 is provided with a guide hole at the position corresponding to the guide post. The guide post is inserted into the guide hole and is used to guide the fixed template 110 and the movable template 120 to be accurately aligned during the mold closing process.

[0038] In a feasible embodiment, the working principle of the venting structure of this application is as follows: when the mold is closed, the moving mold plate 110 presses against the movable venting insert 210 to retract into the mounting groove 220, which fits against the cavity to ensure sealing; during molding, the high-pressure air in the cavity enters the main venting channel 240 through the venting branch channel 310 of the movable venting insert 210, and is discharged out of the cavity under the active "suction" action of the negative pressure device, achieving efficient venting; when the mold is opened, the reset spring pushes the movable venting insert 210 to reset, and the cleaning protrusion on its end face simultaneously cleans the impurities on the edge of the cavity, ensuring that the venting channel is unobstructed for a long time.

[0039] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present utility model.

Claims

1. A venting structure for a shell mold, characterized in that, The device includes a fixed mold plate and a movable mold plate. After the fixed mold plate and the movable mold plate are closed, they enclose a cavity for molding a shell product. A movable venting insert is provided on the inner side of the fixed mold plate corresponding to the edge of the cavity. An installation groove adapted to the movable venting insert is opened inside the fixed mold plate. The movable venting insert moves along the depth direction of the installation groove. A negative pressure venting device is provided on the side of the fixed mold plate away from the cavity. The negative pressure venting device is provided with a negative pressure interface and a main venting channel. One end of the main venting channel is connected to the movable venting insert, and the other end is connected to the negative pressure interface for exporting gas to the negative pressure interface. The main exhaust channel is equipped with a ventilation component.

2. The exhaust structure according to claim 1, characterized in that, The movable venting insert is attached to the inner wall of the cavity on the side facing the cavity, and a return spring is provided between the end of the movable venting insert away from the cavity and the bottom of the mounting groove.

3. The exhaust structure according to claim 1, characterized in that, The movable venting insert has an venting branch channel inside. One end of the venting branch channel extends to the mating surface between the movable venting insert and the cavity, and the other end is connected to the main venting channel.

4. The exhaust structure according to claim 1, characterized in that, The ventilated component is embedded in the main exhaust channel and is located between the movable exhaust insert and the negative pressure interface.

5. The exhaust structure according to claim 2, characterized in that, The movable exhaust insert has sliders on both outer walls, and the inner wall of the mounting groove has a groove corresponding to the sliders. The sliders slide in cooperation with the grooves to guide the movable exhaust insert to move along the depth direction of the mounting groove.

6. The exhaust structure according to claim 2, characterized in that, The movable venting insert has a cleaning protrusion on its end face facing the cavity, and the cleaning protrusion extends along the length of the movable venting insert.

7. The exhaust structure according to claim 3, characterized in that, The inner diameter of the exhaust branch channel gradually increases from the end near the cavity to the end near the main exhaust channel, forming a flared structure.

8. The exhaust structure according to claim 1, characterized in that, When the fixed template and the moving template are closed, the inner sidewall of the moving template presses against the movable venting insert, so that the movable venting insert compresses the return spring and retracts into the mounting groove.

9. The exhaust structure according to claim 1, characterized in that, The fixed template has a guide post on its end face facing the moving template, and the moving template has a guide hole corresponding to the guide post, with the guide post inserted into the guide hole.

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