VGP pouring device and pouring equipment

Abstract

The invention discloses a VGP pouring device and pouring equipment, and relates to the technical field of pouring equipment. The VGP pouring device comprises a vacuum box, a mold and a flow guide piece. A pouring groove is formed in the upper end of the vacuum box; the mold is arranged in the vacuum box, a feeding channel communicated with a cavity in the mold is formed in the upper end of the mold, and an upper opening of the feeding channel is located below the pouring groove; the flow guide piece is arranged between the feeding channel and the pouring groove; materials entering the vacuum box through the pouring groove fall on the flow guide piece, can be dispersed firstly, and then enter the cavity through the feeding channel. According to the VGP pouring device provided by the invention, the contact range of the material and the vacuum environment in the vacuum box is conveniently expanded by dispersing through the flow guide piece in a free falling body material injection mode, so that residual tiny bubbles in the material are quickly separated out, and the quality of a final poured and molded product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pouring equipment, in particular to a VGP pouring device and pouring equipment. BACKGROUND

[0002] In the process of material pouring forming by using VPG (Vacuum Pressure Gelation) pouring process, the whole process needs to strictly follow the established operation specification to ensure product quality. The material is drawn out from the pre-prepared tank, injected into the lower end of the vacuum box through the conveying pipeline. After the material enters the vacuum box, it will move along the established pipeline and finally input into the mold cavity. In this specific space of the mold cavity, the material begins to form according to the pre-designed shape. After a certain period of curing treatment, the material gradually solidifies and finally forms a product that meets the requirements.

[0003] However, in the production and transportation of materials, due to various factors, a certain amount of bubbles will inevitably be generated inside the material. Under the current operation mode, the content of these bubbles generated inside the material can only be determined by the nature of the material itself. That is, if the material itself has good exhaust performance, the bubble content may be relatively low; on the contrary, if the material has poor exhaust performance, the bubble content will be higher. These bubbles cannot be effectively degassed in the existing process. The existence of bubbles will seriously affect the quality of the final product, for example, it may cause the insulation performance of the product to decrease, the mechanical strength to decrease, and thus affect the reliability and stability of the product in actual use. SUMMARY

[0004] Therefore, the purpose of the present application is to overcome the deficiencies in the related art, and the present application provides a VGP pouring device and pouring equipment.

[0005] The present application provides the following technical solutions: A VGP pouring device, comprising a vacuum box, a mold, and a flow guide.

[0006] The upper end of the vacuum box is provided with a pouring groove; the mold is installed in the vacuum box, the upper end of the mold is provided with a feeding channel communicating with the cavity in the mold, and the upper opening of the feeding channel is located below the pouring groove; the flow guide is arranged between the feeding channel and the pouring groove; the material entering the vacuum box through the pouring groove first falls on the flow guide and is dispersed, and then enters the cavity through the feeding channel.

[0007] As a further improvement of the above technical solution, the flow guide is conical, and the tip of the flow guide is upwardly arranged, and the lower end of the flow guide has a smaller diameter than the upper opening of the feeding channel.

[0008] As a further improvement of the above technical solution, the feeding channel is frustoconical, and the lower opening of the feeding channel has a smaller diameter than the upper opening of the feeding channel.

[0009] As a further improvement of the above technical solution, the flow guide has a plurality of support members uniformly distributed on the side wall, and the flow guide is supported on the inner side wall of the feeding channel through the support members.

[0010] As a further improvement of the above technical solution, the included angle between the two generatrices of the flow guide is α, and the value of α satisfies 40°≤α≤70°.

[0011] As a further improvement of the above technical solution, the tip of the flow guide is a circular arc transition.

[0012] As a further improvement of the above technical solution, the diameter of the circular arc surface of the tip of the flow guide is not greater than the diameter of the pouring groove.

[0013] As a further improvement of the above technical solution, the VGP pouring device further comprises a material conveying assembly, the material conveying assembly comprises a material tank, the lower end of the material tank is connected to the upper opening of the pouring groove through a material conveying pipe, and the material conveying pipe is provided with a material valve.

[0014] As a further improvement of the above technical solution, the upper end of the material tank is provided with a gas inlet, and the gas inlet is in communication with a pressurizing device.

[0015] The application further provides a pouring device comprising the VGP pouring device according to any one of the above.

[0016] Compared with the related art, the application has the following beneficial effects: The VGP pouring device provided by the application can be used to manufacture various products by using the pouring forming process in actual production process.

[0017] After the vacuum chamber is evacuated, the material injection process begins. The pre-prepared material is slowly injected into the vacuum chamber through a casting tank located above it. Once inside, the material falls freely towards the feed channel on the mold directly below the casting tank. During this process, the material is obstructed by the guide components between the casting tank and the feed channel. Upon contact with these components, the material is blocked and dispersed. The initially concentrated material gradually spreads out under the influence of the guide components, forming a more dispersed state.

[0018] After the material is spread out, its contact area with the vacuum environment inside the vacuum chamber increases. Due to the pressure difference between the vacuum environment and the inside of the material, the tiny air bubbles remaining in the material will quickly precipitate out under the action of this pressure difference.

[0019] After being guided by the flow guide, the material continues to fall along the predetermined path and smoothly enters the mold cavity through the feeding channel. Inside the cavity, the material fills and shapes according to the mold's form. Finally, after a certain molding time, the material completely solidifies, forming a product that meets the design requirements.

[0020] In summary, the above-described casting process for materials, through a series of scientific and reasonable operations such as vacuuming, material dispersion using guide components, and bubble extraction using a vacuum environment, can effectively reduce the residual bubble content in the material, thereby significantly improving the production quality of the product and providing a reliable and efficient solution for the production of related products.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the VGP casting device from one perspective is shown in one embodiment of the present invention.

[0024] Explanation of key component symbols: 100 - vacuum tank; 110 - pouring channel; 200 - mold; 210 - cavity; 220 - feeding passage; 300 - flow guide; 310 - support; 400 - feeding assembly; 410 - tank; 411 - gas inlet; 420 - feeding pipe; 421 - valve. DETAILED DESCRIPTION

[0025] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters throughout the figures denote the same elements or elements having the same function. The embodiments described below are merely exemplary for the purpose of explaining the present application and are not to be construed as limiting the present application.

[0026] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are merely for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0027] In addition, the terms "first", "second", etc. are used only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0028] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0030] As shown in Figure 1 The embodiment of the present application provides a VGP pouring device, which comprises a vacuum box 100, a mold 200 and a flow guide 300.

[0031] The upper end of the vacuum box 100 is provided with a pouring groove 110; the mold 200 is arranged in the vacuum box 100, and the upper end of the mold 200 is provided with a feeding channel 220 in communication with a cavity 210 in the mold 200; the upper opening of the feeding channel 220 is located below the pouring groove 110; the flow guide 300 is arranged between the feeding channel 220 and the pouring groove 110; the material entering the vacuum box 100 through the pouring groove 110 falls on the flow guide 300 and can be dispersed first, and then enters the cavity 210 through the feeding channel 220.

[0032] The VGP pouring device provided by the embodiment can be used to manufacture various products by using a pouring forming process in actual production. First, an operator needs to pretreat the vacuum box 100. Specifically, the operator starts a vacuum air extraction device to gradually extract the gas in the vacuum box 100 and create a vacuum environment.

[0033] After the vacuum extraction operation of the vacuum box 100 is completed, the material injection link is entered. The prepared material is slowly injected into the vacuum box 100 through the pouring groove 110 arranged above the vacuum box 100. After the material enters the vacuum box 100, it moves by free fall and approaches the feeding channel 220 on the mold 200 located directly below the pouring groove 110. In this process, the material is blocked by the flow guide 300 between the pouring groove 110 and the feeding channel 220. When the material contacts the flow guide 300, it is blocked and dispersed. The originally relatively concentrated material is gradually spread under the action of the flow guide 300 and forms a relatively dispersed state.

[0034] After the material spreads, its contact range with the vacuum environment in the vacuum box 100 increases. Due to the pressure difference between the vacuum environment and the inside of the material, the small bubbles remaining in the material will quickly separate from the material under the action of this pressure difference.

[0035] After being processed by the flow guide 300, the material continues to fall along the established path, smoothly passes through the feeding channel 220, and enters the cavity 210 of the mold 200. In the cavity 210, the material is filled and formed according to the shape of the mold 200. Finally, after a certain time of forming treatment, the material completely solidifies to form a product that meets the design requirements.

[0036] In some specific embodiments, the flow guide 300 is conical, and the tip of the flow guide 300 is arranged upward. When the material falls from above and falls on the conical surface of the flow guide 300, due to the special shape of the conical surface, the material will be evenly dispersed around the conical surface, achieving the effect of uniform dispersion and spreading. This uniform dispersion and spreading is crucial for the separation of bubbles in the material, as it can increase the contact area of the material with the vacuum environment, making it easier and faster for small bubbles remaining in the material to separate from the material, thereby ensuring that the separation of bubbles in the material reaches the best state. The lower end diameter of the flow guide 300 is smaller than the upper opening diameter of the feeding channel 220, to ensure that the material dispersed and spread by the flow guide 300 can all smoothly fall into the feeding channel 220 during the falling process. In this way, on the one hand, it avoids the waste of material caused by the material failing to enter the feeding channel 220 during the falling process, reducing production costs; on the other hand, it also prevents the material from scattering in other locations in the vacuum box 100, thereby avoiding pollution of the internal environment of the vacuum box 100 caused by residual material, ensuring the cleanliness and normal operation of the vacuum box 100.

[0037] In some specific embodiments, the feeding channel 220 is a circular truncated cone, and the lower opening diameter of the feeding channel 220 communicating with the cavity 210 is smaller than the upper opening diameter of the feeding channel 220. When the material enters the feeding channel 220 from above, due to the larger upper opening diameter, the material will be in a relatively spread state at the initial stage of entering, which is connected with the situation of the material being dispersed and spread by the flow guide 300. As the material continues to flow downward in the feeding channel 220, the channel diameter gradually decreases, and the material will naturally change from the spread state to the converging state.

[0038] In the process of gradually changing the material state, the precipitation of bubbles in the material is extremely beneficial. On the one hand, when the material flows in the spread state in the feeding channel 220, the contact area with the vacuum environment in the vacuum box 100 is still large, which can make the residual bubbles in the material continue to precipitate; on the other hand, due to the design of the circular truncated cone of the feeding channel 220, the time of the material in the spread state in the vacuum box 100 is prolonged. Compared with the straight channel, the circular truncated cone makes the flow path of the material longer at the same falling height, so that there is more time for the bubbles to escape from the material.

[0039] Through this design, the final content of bubbles in the material can be further reduced. Because of the reduction of bubbles, the material can be more uniformly and tightly filled after entering the cavity 210, and the internal structure of the molded product is more compact, thereby effectively improving the quality of the product and meeting higher production standards and use requirements.

[0040] In some specific embodiments, the side wall of the flow guide 300 is uniformly distributed with a plurality of support members 310, and the flow guide is supported on the inner side wall of the feeding channel 220 through the support members 310, so as to ensure the stability of the relative position between the flow guide 300 and the feeding channel 220.

[0041] In some specific embodiments, the included angle between the two generatrix of the flow guide 300 is α, and the value of α satisfies: 40°≤α≤70°. On the one hand, when α is in this interval, the moving speed of the material on the conical surface of the flow guide 300 can be ensured to be within a reasonable range. If α is too large, the conical surface of the flow guide 300 is too flat, and the moving speed of the material on the conical surface will be too slow, which will cause the time of the entire pouring process to be prolonged and the production efficiency to be reduced; on the contrary, if α is too small, the conical surface of the flow guide 300 is too steep, and the moving speed of the material on the conical surface will be too fast, and the material may not be able to fully contact with the vacuum environment, which is not conducive to the precipitation of bubbles.

[0042] On the other hand, this value range can also take into account the spread and stay time of the material on the conical surface of the flow guide 300. A suitable α value can make the material have enough time to spread during the process of sliding along the conical surface, increase the contact area with the vacuum environment, so that the small bubbles remaining in the material have sufficient time to precipitate. If the spread and stay time is too short, the bubbles cannot be completely precipitated, which will affect the quality of the product; and if the spread and stay time is too long, the pouring efficiency will be reduced.

[0043] By controlling the value of α in the range of 40°≤α≤70°, the moving speed and the spread and stay time of the material on the conical surface of the flow guide 300 can be considered at the same time, so as to ensure that the bubble precipitation effect of the material in this embodiment is optimal, and the pouring process has high efficiency, which meets the needs of actual production.

[0044] In some specific embodiments, the tapered tip portion of the flow guide 300 is a circular arc transition. During the pouring of the material, the material falls from above and directly contacts the tapered tip portion of the flow guide 300. If the tapered tip of the flow guide 300 is sharp, the material will be subjected to a sudden and strong blocking force at the moment of contact. This sudden blocking force can cause the material to be subjected to a large impact, causing the material to be uneven during the dispersion process, and some of the material may be unable to achieve good dispersion due to the excessive impact force, thereby affecting the subsequent spreading state of the material.

[0045] However, after adopting the circular arc transition design, when the material contacts the tapered tip of the flow guide 300, the blocking force experienced by the material is gradually changed due to the smoothness of the circular arc surface, and the process is more gentle. This gentle blocking method allows the material to disperse more evenly after being blocked. The material can be evenly spread on the tapered surface of the flow guide 300 according to the expected design, increasing the contact area with the vacuum environment and creating favorable conditions for the outgassing of bubbles in the material, thereby ensuring that the dispersion and spreading effect of the material reaches the ideal state and improving the quality and stability of the entire pouring forming process.

[0046] In some specific embodiments, the diameter of the circular arc surface of the tapered tip portion of the flow guide 300 is not greater than the diameter of the pouring slot 110. The diameter of the circular arc surface of the tapered tip portion of the flow guide 300 is not greater than the diameter of the pouring slot 110, to ensure the dispersion of the material while ensuring the dispersion and falling speed of the material along the flow guide 300.

[0047] In some specific embodiments, the VGP pouring device further comprises a material conveying assembly 400, which comprises a material tank 410. The lower end of the material tank 410 is connected to the upper opening of the pouring slot 110 through a material conveying pipe 420. The material conveying pipe 420 is provided with a material valve 421. By operating the material valve 421, the amount of material entering the pouring slot 110 can be flexibly controlled according to actual production needs, thereby ensuring the stability of the material conveying of the pouring slot of the vacuum box 100. Whether in continuous production or intermittent production, the material valve 421 can play a role, so that the conveying of the material always remains stable, avoiding pouring quality problems caused by unstable material conveying.

[0048] In some specific embodiments, the upper end of the tank 410 is provided with a gas inlet 411, which is in communication with a pressurizing device; in actual production operation, the pressurizing device can generate compressed air, which is delivered to the inside of the tank 410 through the gas inlet 411. The reason for choosing compressed air as the power for material delivery is that compressed air has many advantages. It is widely available and easy to obtain, and the cost is relatively low; at the same time, the pressure and flow of compressed air can be accurately controlled and adjusted by the pressurizing device, which can meet the needs of different materials and different production conditions.

[0049] When the compressed air enters the tank 410, it will form a certain pressure in the tank 410. Under the action of this pressure, the material in the tank 410 will be uniformly pushed, so as to be smoothly and continuously delivered to the pouring groove 110. Compared with the traditional gravity or other simple mechanical way of delivering material, using compressed air to deliver material can effectively avoid unstable conditions such as blockage and flow interruption of the material during delivery. The material can enter the pouring groove 110 at a uniform speed and flow rate, ensuring the uniformity of the material distribution in the pouring groove 110, and thus providing a good foundation for the subsequent pouring forming process.

[0050] This smooth and continuous material delivery method can greatly ensure the quality of pouring forming. Because if the material delivery is unstable, it may cause the amount of material in the pouring groove 110 to be uneven, resulting in uneven density of the formed product, and defects such as loose and hollow, which affect the strength and performance of the product. By using compressed air as the delivery power, the stability of material delivery is ensured, so that the internal structure of the formed product is more dense and uniform, thereby improving the overall quality of the product.

[0051] The embodiments of the present application also provide a pouring device comprising the VGP pouring device in the above embodiments, which has all the beneficial effects of the VGP pouring device, which will not be described in detail here.

[0052] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0053] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that variations, modifications, substitutions and changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A VGP casting device, characterized in that, include: A vacuum chamber (100) is provided with a casting groove (110) at its upper end. A mold (200) is installed inside the vacuum chamber (100). The upper end of the mold (200) is provided with a feeding channel (220) that communicates with the cavity (210) inside the mold (200). The upper opening of the feeding channel (220) is located below the casting groove (110). A flow guide (300) is disposed between the feed channel (220) and the casting tank (110); The material entering the vacuum chamber (100) through the casting tank (110) falls onto the guide member (300) and is first dispersed, and then enters the cavity (210) through the feeding channel (220).

2. The VGP casting apparatus according to claim 1, characterized in that, The guide (300) is tapered, with the tip of the guide (300) facing upwards, and the lower diameter of the guide (300) is smaller than the upper opening diameter of the feed channel (220).

3. The VGP casting apparatus according to claim 2, characterized in that, The feeding channel (220) is frustum-shaped, and the diameter of the lower opening of the feeding channel (220) that connects to the cavity (210) is smaller than the diameter of the upper opening of the feeding channel (220).

4. The VGP casting apparatus according to claim 3, characterized in that, The guide (300) has multiple support members (310) evenly distributed on its side wall, and the guide (300) is mounted on the inner side wall of the feed channel (220) through the support members (310).

5. The VGP casting apparatus according to claim 2, characterized in that, The angle between the guide element (300) and the two generatrices is α, and the value of α satisfies: 40°≤α≤70°.

6. The VGP casting apparatus according to claim 2, characterized in that, The cone tip of the guide (300) has a rounded transition.

7. The VGP casting apparatus according to claim 6, characterized in that, The diameter of the arc surface of the cone tip of the guide (300) is not greater than the diameter of the casting groove (110).

8. The VGP casting apparatus according to any one of claims 1 to 7, characterized in that, The VGP casting device also includes a material conveying assembly (400), which includes a material tank (410). The lower opening of the material tank (410) is connected to the upper opening of the casting tank (110) through a material conveying pipe (420). A material valve (421) is provided on the material conveying pipe (420).

9. The VGP casting apparatus according to claim 8, characterized in that, The upper end of the material tank (410) is provided with an air inlet (411), which is connected to a pressurizing device.

10. A casting device, characterized in that, Includes the VGP casting apparatus as described in any one of claims 1 to 9.

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