Bubble discharging structure and mold

Abstract

The utility model discloses a bubble discharging structure and a mold, and relates to the technical field of casting molding, the bubble discharging structure comprises a first exhaust channel, a storage tank and a second exhaust channel; the first exhaust channel is communicated with the pouring cavity; the first exhaust channel is communicated with the bottom of the storage tank; two ends of the second exhaust channel are respectively communicated with the storage tank and the outside atmosphere; according to the bubble discharging structure provided by the utility model, in the process of carrying out material injection casting molding in the mold, along with the continuous increase of materials in the casting cavity, the materials can extrude gas in the cavity, so that the gas sequentially passes through the first exhaust channel, the material storage tank and the second exhaust channel and is finally discharged. When the pouring cavity is filled with materials and overflows into the material storage groove, bubbles mixed in the materials can be effectively separated from the materials in the material storage groove and escape, and finally the bubbles are exhausted through the second exhaust channel. The design can obviously reduce the existence probability of bubbles in the material, so that the production quality of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of casting molding processes, and particularly to a bubble exhaust structure and a mold. Background Art

[0002] The production process of epoxy castings is indeed a complex and delicate technological process, which involves precise control and coordinated operation of multiple links, significantly increasing the difficulty of process control. From the preparation of raw materials, the precise proportioning of mixing ratios, to the strict monitoring of parameters such as temperature, pressure, and time during the casting process, each link directly affects the quality of the final product.

[0003] During the actual production process of castings, the generation of bubbles is one of the most common and troublesome problems. This is mainly because during the casting process, the tiny air originally present inside the mold is squeezed by the rapidly injected epoxy resin material. It is difficult for this air to be quickly discharged, so it will float upward in the cavity and gather at certain high points of the mold, eventually forming bubbles on the surface or inside of the product. These bubbles not only damage the appearance beauty of the product, but may also lead to a decrease in its mechanical strength and impaired insulation performance, becoming potential safety hazards. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to overcome the deficiencies in related technologies. The utility model provides a bubble exhaust structure and a mold.

[0005] The utility model provides the following technical solutions:

[0006] A bubble exhaust structure is arranged on a mold. The bubble exhaust structure includes a first exhaust channel, a material storage tank, and a second exhaust channel.

[0007] The first exhaust channel is opened on the mold. The first exhaust channel is located above the casting cavity of the mold, and one end of the first exhaust channel is communicated with the upper part of the casting cavity; the material storage tank is arranged on the mold. The material storage tank is located above the first exhaust channel, and the end of the first exhaust channel far away from the casting cavity is communicated with the bottom of the material storage tank; the second exhaust channel is opened on the mold. The second exhaust channel is located above the material storage tank, one end of the second exhaust channel is communicated with the top of the material storage tank, and the other end of the second exhaust channel is communicated with the external atmosphere.

[0008] As a further improvement of the above technical solution, the first exhaust channel is arranged in a reciprocating and bending manner.

[0009] As a further improvement of the above technical solution, the horizontal cross-sectional area of the bottom of the material storage tank is larger than the cross-sectional area of the first exhaust channel.

[0010] As a further improvement of the above technical solution, the top of the material storage tank is a conical top, and the second exhaust passage communicates with the highest point of the conical top.

[0011] As a further improvement of the above technical solution, the second exhaust passage is horizontally arranged.

[0012] As a further improvement of the above technical solution, a buffer portion is provided on the second exhaust passage, and the inner cross-sectional area of the buffer portion is larger than the inner cross-sectional area of the non-buffer portion of the second exhaust passage.

[0013] As a further improvement of the above technical solution, both ends of the buffer portion communicate with the non-buffer portion of the second exhaust passage respectively.

[0014] As a further improvement of the above technical solution, the first exhaust passage, the material storage tank, and the second exhaust passage are all formed by enclosing the fixed mold and the movable mold of the mold.

[0015] As a further improvement of the above technical solution, the first exhaust passage is divided into two parts, which are respectively opened on the fixed mold and the movable mold; the material storage tank and the second exhaust passage are both opened on the end face of the fixed mold close to the movable mold.

[0016] As a further improvement of the above technical solution, a sealing strip is installed on the end face of the fixed mold close to the movable mold, and the sealing strip surrounds the outside of the first exhaust passage and the material storage tank.

[0017] As a further improvement of the above technical solution, the sealing strip is made of silica gel material.

[0018] The present invention also provides a mold, including the air bubble exhausting structure described in any one of the above.

[0019] Compared with the related art, the beneficial effects of the present invention are:

[0020] The air bubble exhausting structure provided by the present invention, during the process of injection molding with material injection in the mold, as the material continuously increases in the casting cavity, pressure is generated on the existing gas in the cavity, forcing these gases to flow smoothly along the preset first exhaust passage and first enter the material storage tank. The material storage tank not only serves as a temporary passage for gases but also is a key place for bubble separation. When the material continuously pours in and gradually fills the cavity, finally part of the material will overflow into the material storage tank, forming a relatively stable liquid level. The existence of this liquid level provides sufficient space and time for the tiny bubbles mixed in the material to float and separate. Under the action of buoyancy, the bubbles break away from the main body of the material, rise to the liquid level and effectively escape into the air, which greatly reduces the possibility of bubbles being captured by the final product.

[0021] Immediately afterwards, the material after bubble separation continues to remain in the storage tank, waiting for the next stage of processing or treatment. The pure material that has completely got rid of the bubble trouble further consolidates the quality foundation of the product through the subsequent technological process. At the same time, the bubbles and the remaining gas in the storage tank continue to be discharged out of the mold system orderly along the second exhaust channel, ensuring the cleanliness and high efficiency of the entire injection molding environment, thereby improving the final production quality of the product.

[0022] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes detailed descriptions as follows. Description of the Drawings

[0023] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0024] Figure 1 Shows a perspective structural schematic diagram of the bubble exhaust structure on the fixed mold in one embodiment of the present utility model;

[0025] Figure 2 Shows a perspective structural schematic diagram of the bubble exhaust structure on the moving mold in one embodiment of the present utility model.

[0026] Main Element Symbol Description:

[0027] 100 - First exhaust channel; 200 - Mold; 201 - Pouring cavity; 210 - Fixed mold; 211 - Injection port; 220 - Moving mold; 300 - Storage tank; 310 - Bottom; 320 - Top; 400 - Second exhaust channel; 410 - Buffer part; 500 - Sealing strip. Detailed Embodiment

[0028] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as limiting the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0031] In the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, the first feature being "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 being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0033] Embodiment 1

[0034] Combined with Figure 1 、 Figure 2 As shown, this embodiment provides a bubble exhaust structure disposed on the mold 200. The bubble exhaust structure includes a first exhaust channel 100, a material storage tank 300, and a second exhaust channel 400.

[0035] The first exhaust passage 100 is formed in the mold 200. The first exhaust passage 100 is located above the pouring cavity 201 of the mold 200. One end of the first exhaust passage 100 communicates with the upper part of the pouring cavity 201. The material storage tank 300 is arranged on the mold 200. The material storage tank 300 is located above the first exhaust passage 100. The end of the first exhaust passage 100 away from the pouring cavity 201 communicates with the bottom 310 of the material storage tank 300. The second exhaust passage 400 is formed in the mold 200. The second exhaust passage 400 is located above the material storage tank 300. One end of the second exhaust passage 400 communicates with the top 320 of the material storage tank 300. The other end of the second exhaust passage 400 communicates with the external atmosphere.

[0036] In the bubble exhaust structure provided in this embodiment, during the process of injection molding in the mold 200, material is injected into the pouring cavity 201 from the injection port 211. As the material continuously increases in the pouring cavity 201, pressure is generated on the existing gas in the cavity, forcing these gases to flow smoothly along the preset first exhaust passage 100 and first enter the material storage tank 300. When the material continues to pour in and gradually fills the cavity, finally part of the material will overflow into the material storage tank 300, forming a relatively stable liquid level. The existence of this liquid level provides sufficient space and time for the tiny bubbles mixed in the material to float and separate. Under the action of buoyancy, the bubbles break away from the main body of the material, rise to the liquid level and effectively dissipate into the air. This process greatly reduces the possibility of bubbles being trapped by the final product. Then, the material after bubble separation continues to remain in the material storage tank 300, waiting for the next stage of processing or treatment, while the pure material that has completely got rid of the bubble trouble further consolidates the quality foundation of the product through the subsequent process flow. At the same time, the bubbles and the remaining gas in the material storage tank 300 continue to be discharged out of the mold 200 system along the second exhaust passage 400 in an orderly manner, ensuring the cleanliness and high efficiency of the entire injection molding environment, thereby improving the final production quality of the product.

[0037] In some specific embodiments, the first exhaust passage 100 is arranged in a reciprocating and bending manner. By cleverly designing the first exhaust passage 100 into a multi-segment folding and continuously bending form, not only the space utilization is optimized, but also the efficiency and effect of the exhaust process are greatly enhanced.

[0038] When the material in the casting cavity 201 is gradually filled under pressure and approaches the saturated state, the excess gas and entrained bubbles will naturally float upward and seek an escape path. At this time, once these bubbles enter the reciprocatingly bent first exhaust passage 100, they will undergo a series of complex flow and collision processes. At each turn and bend of the passage, the bubbles in the material are forced to collide at high speed with the hard and smooth inner wall of the first exhaust passage 100, and this physical effect effectively promotes the fragmentation and separation of the bubbles, enabling the small bubbles that might have been trapped inside the material to be released.

[0039] In addition, the design of the reciprocatingly bent passage also creates more path turning points and surface areas, providing more opportunities and space for the bubbles to escape. These additional surface areas not only increase the contact frequency between the bubbles and the wall surface, but also further disturb the microstructure inside the material by changing the direction and speed of the material flow, helping the bubbles to break away from the main body of the material more thoroughly.

[0040] In some specific embodiments, the horizontal cross-sectional area of the bottom 310 of the storage tank 300 is larger than the cross-sectional area of the first exhaust passage 100; specifically, the relatively large horizontal cross-sectional area of the bottom 310 forms a significant "buffer zone" relative to the cross-sectional area of the first exhaust passage 100. When the gas entrained in the material and the excess material overflow from the first exhaust passage 100 and enter the storage tank 300, this area can effectively slow down the flow rate of the material and reduce the direct impact, thus achieving a smooth transition.

[0041] Furthermore, the relatively large horizontal cross-sectional area of the bottom 310 of the storage tank 300 also brings another important advantage: it enables a relatively large material liquid surface area to be maintained inside the storage tank 300. This feature is crucial for enhancing the rate of gas overflowing from the material. As the liquid surface of the material rises, the pressure distribution inside the material becomes more uniform, which is conducive to the bubbles rising more easily to the surface of the material under the action of buoyancy and bursting and releasing. At the same time, the relatively large material liquid surface also increases the chance of contact between the bubbles and the surface of the material, accelerating the process of gas release from the material.

[0042] In some specific embodiments, the top 320 of the storage tank 300 is a conical top, and the second exhaust passage 400 is connected to the highest point of the conical top; by shaping the top end of the storage tank 300 into a cone, using the principle of physics that gas and bubbles tend to float upward and gather in areas with a higher liquid surface or obvious shape changes in a liquid.

[0043] Specifically, when the material accumulates in the storage tank 300 and gradually stabilizes, the bubbles contained therein and the gas escaping from the interior of the material will naturally be affected by buoyancy and move upward. Due to the geometric characteristics of the conical top, these bubbles and gases will gradually converge towards the center of the conical top during the upward movement, forming a relatively concentrated area. This design not only simplifies the process of collecting bubbles and gases but also improves the efficiency of gas collection.

[0044] More critically, by arranging the second exhaust passage 400 at the highest point of the conical top and directly connecting it thereto. Such a layout arrangement ensures that when the bubbles and gases accumulate at the conical top to a certain extent, they can be quickly and smoothly discharged outside the storage tank 300 through the second exhaust passage 400. This design not only reduces the residence time of the gas in the storage tank 300, reduces the adverse impact of the gas on the quality of the material, but also significantly improves the efficiency and stability of the overall production process.

[0045] In some specific embodiments, the second exhaust passage 400 is horizontally arranged; the horizontally arranged second exhaust passage 400 first ensures that during the process of the material or gas entering from its inlet and flowing along the passage, a relatively stable flow state can be maintained. This stable flow is crucial for promoting gas-liquid separation because it reduces the turbulence phenomenon caused by sudden changes in flow velocity or sharp changes in direction, thus facilitating the coalescence and upward movement of bubbles and the stable sinking of the liquid part.

[0046] As the material or gas continuously flows in the horizontally arranged second exhaust passage 400, the bubbles will gradually move upward towards the upper part of the passage due to their lower density, while the liquid part will sink due to the action of gravity. This natural separation process is fully developed and continued in the horizontal passage, further improving the efficiency of gas-liquid separation. In addition, the horizontal arrangement helps to reduce the residence time of the material in the passage and reduces the risk of physical or chemical changes that the material may undergo due to long-term contact.

[0047] More importantly, by horizontally arranging the second exhaust passage 400, the possibility of the material spraying out from this passage can be effectively reduced. This is because the horizontal passage reduces the impact force and instability of the material flow, making the liquid part of the material more inclined to flow slowly along the wall surface of the passage under the action of gravity and separation force, rather than escaping in a spraying form. This design not only protects the cleanliness of the production environment but also avoids material waste and potential safety hazards.

[0048] In some specific embodiments, a buffer portion 410 is provided on the second exhaust passage 400, and the inner cross-sectional area of the buffer portion 410 is larger than that of the non-buffer portion of the second exhaust passage 400; both ends of the buffer portion 410 are communicated with the non-buffer portion of the second exhaust passage 400. By introducing the buffer portion 410 into the second exhaust passage 400, refined management of the flow process of materials and gases is achieved. The buffer portion 410 can not only effectively absorb and disperse the impact energy from the upstream, reducing the impact on the downstream, but also enable the materials and gases to maintain a more stable flow rate and state during the outward discharge process.

[0049] In some specific embodiments, the first exhaust passage 100, the material storage tank 300, and the second exhaust passage 400 are all formed by enclosing the fixed mold 210 and the movable mold 220 of the mold 200. When the mold 200 completes its production tasks such as injection molding or die casting, the fixed mold 210 and the movable mold 220 will be separated according to a pre-set procedure. At this time, the first exhaust passage 100, the material storage tank 300, and the second exhaust passage 400, which were originally tightly wrapped inside the mold 200, are exposed, enabling the operator to easily reach the inner walls of these components. This design greatly facilitates the cleaning of these key areas because the operator can directly clean the inside of the channels and tanks thoroughly without disassembling the complex structure of the mold 200, effectively removing possible residual material residues, oil stains, or other impurities during the production process.

[0050] In addition, since the first exhaust passage 100, the material storage tank 300, and the second exhaust passage 400 are all directly formed by enclosing the fixed mold 210 and the movable mold 220, their shapes, sizes, and positions can be precisely controlled and adjusted during the mold 200 design stage. This high degree of customization not only meets the process requirements under different production needs but also ensures that the mold 200 can maintain stable performance and reliable quality during use.

[0051] In some specific embodiments, the first exhaust passage 100 is divided into two parts and is respectively opened on the fixed mold 210 and the movable mold 220, ensuring that the first exhaust passage 100 can maintain reliable communication with the casting cavity regardless of the state of the mold 200; the material storage tank 300 and the second exhaust passage 400 are both opened on the end face of the fixed mold 210 close to the movable mold 220. This layout also helps to improve the use stability of the material storage tank 300 and the second exhaust passage 400 because they are on the fixed mold 210 of the mold 200 and do not need to move during the opening and closing process of the mold 200, and the impact and vibration they receive are relatively small, thus extending the service life of the mold 200.

[0052] In some specific embodiments, a sealing strip 500 is installed on the end face of the fixed mold 210 close to the movable mold 220, and the sealing strip 500 surrounds the outside of the first exhaust channel 100 and the material storage tank 300. When the movable mold 220 slowly approaches the fixed mold 210 for the mold closing operation, the sealing strip 500 plays its key role. As the mold 200 gradually closes, the sealing strip 500 is firmly pressed around the mold closing seam of the first exhaust channel 100 and the material storage tank 300, forming a barrier. This barrier completely isolates the mold closing seam from the casting cavity 201, and can effectively prevent any material or gas carrying bubbles that may leak from the first exhaust channel 100 or the material storage tank 300 from entering the inside of the casting cavity 201, ensuring the production quality of the product.

[0053] In some specific embodiments, the sealing strip 500 is made of silica gel material because it has good wear resistance, high temperature resistance and sealing performance.

[0054] Embodiment 2

[0055] The present utility model also provides a mold 200. The mold 200 adopts different casting cavities 201 according to the shapes of the products to be cast, and includes the air bubble exhausting structure described in Embodiment 1. The mold 200 has all the beneficial effects of the air bubble exhausting structure, and will not be described in detail here.

[0056] In the description of this specification, the description with reference to terms such as "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 utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0057] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. An air bubble exhaust structure is provided on a mold (200), characterized in that, Including: A first exhaust passage (100) is formed on the mold (200). The first exhaust passage (100) is located above the pouring cavity (201) of the mold (200), and one end of the first exhaust passage (100) communicates with the upper part of the pouring cavity (201). A material storage tank (300) is arranged on the mold (200). The material storage tank (300) is located above the first exhaust passage (100), and the end of the first exhaust passage (100) far from the pouring cavity (201) communicates with the bottom (310) of the material storage tank (300). A second exhaust passage (400) is formed on the mold (200). The second exhaust passage (400) is located above the material storage tank (300), one end of the second exhaust passage (400) communicates with the top (320) of the material storage tank (300), and the other end of the second exhaust passage (400) communicates with the external atmosphere.

2. The bubble exhaust structure according to claim 1, wherein, The first exhaust passage (100) is arranged in a reciprocally bent manner.

3. The bubble exhaust structure according to claim 1, wherein The horizontal cross-sectional area of the bottom (310) of the material storage tank (300) is larger than the cross-sectional area of the first exhaust passage (100).

4. The bubble exhaust structure according to claim 1, wherein The top (320) of the material storage tank (300) is a conical top, and the second exhaust passage (400) communicates with the highest point of the conical top.

5. The air bubble exhausting structure according to claim 1, wherein The second exhaust passage (400) is arranged horizontally.

6. The bubble exhaust structure according to claim 5, wherein, A buffer portion (410) is provided on the second exhaust passage (400), and the inner cross-sectional area of the buffer portion (410) is larger than the inner cross-sectional area of the non-buffer portion of the second exhaust passage (400).

7. The air bubble exhaust structure according to claim 6, characterized in that, Both ends of the buffer portion (410) communicate with the non-buffer portions of the second exhaust passage (400) respectively.

8. The bubble exhaust structure according to any one of claims 1 to 7, characterized in that, The first exhaust passage (100), the material storage tank (300), and the second exhaust passage (400) are all formed by enclosing the fixed mold (210) and the movable mold (220) of the mold (200).

9. The bubble exhaust structure according to claim 8, characterized in that A sealing strip (500) is installed on the end face of the fixed mold (210) close to the movable mold (220), and the sealing strip (500) surrounds the outer sides of the first exhaust passage (100) and the material storage tank (300).

10. A mold, characterized in that, Including the air bubble exhausting structure according to any one of claims 1 to 9.

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