Mining housing body, housing, sensor, and manufacturing process for mining housing body

Abstract

The present invention relates to the technical field of mining housings, in particular to a mining housing body, a housing, a sensor, and a manufacturing process for a mining housing body. The mining housing body comprises an outer housing body, wherein an inner housing body is injection-molded in the outer housing body, and the inner housing body has filleted corner portions; arc support portions are provided in a recessed manner and correspond to the filleted corner portions of the inner housing body; and each reinforcing bottom sheet is connected to both the arc support portion and a bottom surface of the outer housing body. The arc support portions can support the inner housing body, so as to assist the filleted corner portions in resisting contraction forces transmitted from side walls of the inner housing body. The bonding forces between the reinforcing bottom sheets and the bottom surface of the outer housing body can match the arc support portions and be dispersed on the filleted corner portions in a height direction, so as to further resist the contraction forces transmitted from the side walls of the inner housing body. Inner support sheets can, on one hand, reinforce the arc support portions, so as to increase the bonding forces between the arc support portions and the outer housing body, and on the other hand, support the arc support portions and the filleted corner portions, so as to reduce the possibility of the filleted corner portions cracking or being separated from the outer housing body.

Description

Mining shell, housing, sensor and mining shell manufacturing process Technical Field

[0001] The present invention relates to the technical field of mining shells, and in particular to a mining shell, a shell, a sensor and a manufacturing process of the mining shell. Background Art

[0002] Mining electronic equipment operates in harsh environments, and the complex underground coal mine environment poses challenges to the IP protection, strength, and electromagnetic shielding performance of electronic equipment housings. Furthermore, GB / T3836-2021 also imposes stringent testing requirements on equipment housings used in explosive environments, including impact resistance, drop resistance, flame retardancy, heat resistance, cold resistance, and high and low temperature shock.

[0003] Metal casings used in mining applications typically utilize stainless steel welding or stretching processes. This results in poor consistency in the internal waterproof sealing structure and mounting studs, making it difficult to guarantee protective performance. Furthermore, metal casings must maintain a certain wall thickness to meet strength requirements, resulting in heavy weight. Plastic casings used in mining applications suffer from weaknesses such as low structural strength, poor electromagnetic shielding performance, and the need for flame retardant modification. As coal mine safety requirements for equipment stability continue to rise, there is an urgent need for a composite waterproof casing suitable for mining electronic equipment that combines strength, protection, lightweight, consistent design, stability, reliability, and environmental adaptability.

[0004] Nano-injection molding is a new technology that achieves a strong bond between plastic and metal. Injection molding requires the use of a T-treatment process to form nano-scale holes on the metal surface, and then injecting plastic into the nano-holes, using the anchor effect to achieve plastic-metal bonding.

[0005] The nano-injection molding process requires the nano-scale plastic to possess high fluidity and low shrinkage. High mold temperature and high pressure are required for injection molding. Metal parts must be preheated before injection to ensure the plastic can quickly fill the nano-voids before the injection molding cools. Furthermore, a pre-processed adhesive structure must be machined into the metal part to strengthen the bond between the plastic and the metal. After injection molding, the product undergoes a long annealing and baking process to eliminate internal stresses in the metal and plastic. Overall, the complex process, multiple steps, and high cost of nano-injection molding have hindered its widespread adoption.

[0006] Currently, nanoinjection molding is primarily used for flat, thin-walled structures such as lithium battery covers and mobile phone casings. These products require a small injection volume, and injection shrinkage is limited to two dimensions. The metal-plastic bond is strengthened by a glue-stretching structure, making the molding process relatively simple. Large, deep-frame waterproof casings, on the other hand, are more complex structures. Besides simple mounting studs, they also require complex sealing and protective structures. The rounded corners of deep-frame waterproof casings are particularly susceptible to shrinkage stress from the sidewalls, leading to separation between the plastic corners and the casing.

[0007] Summary of the Invention

[0008] In order to solve the technical problems in the prior art, the present invention provides a mining shell, a shell, a sensor and a manufacturing process of the mining shell.

[0009] The technical solution adopted by the present invention to solve its technical problems is: a mining outer shell, comprising an outer shell; an inner shell, the inner shell is injection-molded in the outer shell, and the inner shell is provided with a rounded corner; an arc support portion, the arc support portion is concavely arranged and corresponds to the rounded corner of the inner shell; a reinforcing bottom plate, the reinforcing bottom plate is connected to the arc support portion and the bottom surface of the outer shell at the same time, and the reinforcing bottom plate is not connected to the inner shell; an inner support plate, the inner support plate is arranged between the arc support portion and the inner shell, and is located at the bottom of the arc support portion, and the inner support plate is connected to the inner shell, the arc support portion and the outer shell at the same time.

[0010] In the mining shell of the present invention, the arc support portion can support the inner shell, helping the fillet portion to resist the contraction force transmitted from the side wall of the inner shell. The bonding force between the reinforcing bottom plate and the bottom surface of the outer shell can cooperate with the arc support portion and be dispersed on the fillet portion along the height direction, further resisting the contraction force transmitted from the side wall of the inner shell. At the same time, the reinforcing bottom plate is not connected to the inner shell, which can avoid the possibility of the contraction stress on the reinforcing bottom plate being transmitted to the inner shell, thereby preventing it from aggravating the contraction force on the arc support portion. The arc support portion can use the full bonding force of the reinforcing bottom plate plastic to resist the contraction force it is subjected to. In addition, the inner support plate can, on the one hand, strengthen the arc support portion and increase the bonding force between the arc support portion and the outer shell, and on the other hand, support the arc support portion and the fillet portion, helping the fillet portion to resist the contraction force of the inner shell side wall, reducing the possibility of the fillet portion cracking or separation from the outer shell.

[0011] Furthermore, a closing stud is connected to the inner support plate, and a first embedded nut is provided in the closing stud, and the first embedded nut is suitable for connecting with the cover plate; the closing stud is connected to the arc support part through a reinforcing rib; the reinforcing ribs are arranged in pairs.

[0012] Through the above solution, the reinforcing ribs can support the arc support portion and enhance the structural strength of the closing stud. Moreover, because the reinforcing ribs are not connected to the rounded corner portion, the shrinkage force borne by the rounded corner portion will not be increased.

[0013] Furthermore, a first wrapping layer is provided on the inner shell, and the first wrapping layer is connected to the end surface of the outer shell.

[0014] Through the above solution, the first wrapping layer is used to increase the bonding area between the metal and the plastic, providing tensile stress for the rounded corners on all sides to resist the shrinkage force. In addition, the first wrapping layer can be used as a mounting and fixing surface connected to the cover plate. The flatness of the plastic-molded first wrapping layer as a fixing surface is higher than the flatness of the end face of the outer shell, which can reduce the requirements for the flatness of the end face of the outer shell and reduce the difficulty of processing the outer shell.

[0015] Furthermore, a reduction groove is provided on the inner side of the arc portion, and the reduction groove is arranged along the height direction.

[0016] Through the above solution, the wall thickness of the arc portion is locally reduced through the reduction groove. Since the bonding force only takes effect at the bonding surface between the outer shell and the inner shell, local reduction of the wall thickness will not affect the bonding force there, but it can reduce the inherent shrinkage force generated by injection molding here.

[0017] Furthermore, a protruding portion is provided on the side surface of the reinforcing bottom plate, and the protruding portion is connected to the bottom surface of the outer shell.

[0018] Through the above solution, the ejection part can, on the one hand, increase the bonding force between the bottom plate and the inner bottom surface of the outer shell, and on the other hand, facilitate the push of the ejector pin. Compared with the ejector pin directly leaning against the inner bottom surface of the outer shell, the bearing capacity of the ejection part after being combined with the inner bottom surface of the outer shell is stronger, and the outer shell is not easily deformed.

[0019] Furthermore, a waterproof rib is provided on the end surface of the inner shell, and the waterproof rib is arranged around the circumference of the inner shell and is in a closed state. The waterproof rib is suitable for cooperating with the cover plate.

[0020] Through the above technical solution, the waterproof ribs are easy to cooperate with the cover plate, thereby improving the stability and sealing of the connection between the outer shell and the cover plate.

[0021] Furthermore, an injection-molded nut portion is provided on the reinforcing bottom plate, a second embedded nut is provided in the injection-molded nut portion, the second embedded nut is in hard contact with the inner bottom surface of the outer shell, and the second embedded nut is suitable for connecting to the circuit board.

[0022] Through the above solution, the injection-molded nut portion facilitates the relative fixation of the second embedding nut and the outer shell by injection molding, and the hard contact between the second embedding nut and the inner bottom surface of the outer shell facilitates the conduction between the outer shell and the second embedding nut. Since the second embedding nut is later used to install the circuit board, it is convenient to achieve conduction between the outer shell and the circuit board, and it is convenient for the circuit board to be grounded through the metal outer shell, which can improve the electromagnetic compatibility of the internal electronic components.

[0023] Furthermore, a spring is provided in the injection-molded nut portion, and the spring is in hard contact with the second embedded nut and the outer shell at the same time, so that the second embedded nut and the outer shell are conductive. At the same time, the spring has a buffering effect and can also reduce the requirements for the assembly and manufacturing accuracy of the second embedded nut, especially reducing the flatness requirement of the four second embedded nuts. There is no need to ensure that the four embedded nuts are in the same plane, which can be achieved by using the spring.

[0024] Through the above solution, the spring is used to achieve effective conduction between the second embedded nut and the outer shell, thereby avoiding contact conduction failure caused by size fluctuation of the second embedded nut.

[0025] Furthermore, a perspective window is provided on the outer shell, and a perspective observation window is also connected to the outer shell. The perspective observation window covers the perspective window and fits with the outer surface of the outer shell. A sealing groove is provided on the perspective observation window, and an observation window sealing ring is provided in the sealing groove.

[0026] Furthermore, a hot-pressed cylinder is provided on the perspective observation window, and a hot-pressed hole for the hot-pressed cylinder to pass through is provided on the bottom surface of the outer shell. The hot-pressed hole is arranged around the perspective window, and the part of the hot-pressed cylinder passing through the hot-pressed hole is deformed by hot pressing and anchored on the inner surface of the outer shell.

[0027] Furthermore, the first embedded nut is welded to the inner bottom surface of the outer shell.

[0028] Through the above technical solution, the first embedded nut is welded to the inner surface of the outer shell, and the first embedded nut can be used to support the cover stud, and then support the arc support part and the rounded corner part, to help bear the shrinkage force exerted on the rounded corner part, and the shrinkage force exerted on the rounded corner part is not greater than the bonding force between the rounded corner part and the outer shell.

[0029] Furthermore, a transparent window support sheet is injection-molded on the transparent window, and the hot pressing holes are arranged on the transparent window support sheet.

[0030] Through the above solution, the hot pressing holes are set on the transparent window support sheet, so that no holes need to be opened on the outer shell, which reduces the production difficulty of the outer shell. At the same time, the flatness of the plastic-molded transparent window support sheet is higher than that of the outer shell, and the fixation of the transparent observation window is more reliable.

[0031] Furthermore, the transparent window supporting film is connected to the reinforcing bottom film.

[0032] Through the above solution, after the transparent window support piece is connected to the reinforcing bottom piece, the supporting force of the arc support portion can be increased, and the overall strength of the inner shell can be increased.

[0033] Furthermore, a transparent window fitting ring is provided on the transparent window support sheet, and the transparent window fitting ring is arranged to fit the side wall of the transparent window.

[0034] Through the above technical solution, the transparent window bonding ring can increase the bonding force between the transparent window support sheet and the outer shell, and increase the strength and stability of the transparent window support sheet.

[0035] A mining shell cover plate is used in conjunction with the above-mentioned mining shell body, and comprises a cover plate body connected to the shell body.

[0036] Furthermore, the cover body is provided with side edges along its circumference; a plastic frame is provided inside the cover body, and the plastic frame is arranged close to the cover body and the side edges at the same time; a second wrapping layer is connected to the plastic frame, and the second wrapping layer is connected to one end of the side edge away from the cover body, and the second wrapping layer is suitable for abutting against the outer shell.

[0037] Furthermore, a sealing groove is provided on the plastic frame, and the sealing groove is arranged around the circumference of the cover body to form a closed ring, and a sealing ring is provided in the sealing groove.

[0038] Furthermore, the four corner points of the cover body are provided with rounded corners, the cover body is provided with a screw hole, a screw connecting portion is provided in the sealing groove, the screw connecting portion is arranged close to the rounded corner, and the screw connecting portion is provided with interconnected connecting holes and countersunk holes, and the connecting holes and countersunk holes are coaxially arranged with the screw holes; an avoidance hole is provided on the sealing ring, and the screw connecting portion is arranged in the avoidance hole.

[0039] Through the above solution, connecting holes and countersunk holes are provided on the plastic frame, so that the heads of the bolts connecting the shell and the cover plate can be sunk into the countersunk holes, thereby improving the overall aesthetics.

[0040] Furthermore, the plastic frame is provided with a reinforcement block, which is connected to the cover body. There are four reinforcement blocks, which are respectively located in the middle of each side of the cover body.

[0041] Through the above technical solution, the reinforcement block can improve the bonding force between the plastic frame and the cover body, and at the same time improve the strength of the plastic frame. At the same time, the reinforcement block is located at the weld line, which can enhance exhaust and facilitate the flow of molten plastic during injection molding.

[0042] A mining shell comprises the above-mentioned mining shell shell and a cover plate, wherein the cover plate is connected to the mining shell shell.

[0043] A calibration device adopts the above-mentioned mining shell as its shell.

[0044] A mining shell manufacturing process, based on the above-mentioned mining shell, includes the following steps:

[0045] S1. Stamping: stamping the metal plate to obtain the outer shell;

[0046] S2, chemical treatment, treating the inner surface of the outer shell with a treatment solution to form nano-scale pores;

[0047] S3, preheating, placing the outer shell into the mold and preheating it through the mold;

[0048] S4, injection molding, injection molding the inner surface of the outer shell to obtain the inner shell;

[0049] S5, demoulding, taking the outer shell out of the mold;

[0050] S6, machining, removing the gate on the outer shell by machining;

[0051] S7, polishing, polishing and brushing the outer shell;

[0052] S8, cleaning, performing ultrasonic cleaning on the outer shell;

[0053] S9, hot-melt assembly of the perspective observation window: install the perspective observation window on the outer shell by hot-melt.

[0054] Through the above technical solution, after the inner shell is formed and cooled, the outer shell is subjected to surface drawing and polishing, and then ultrasonic cleaning is performed in warm water. During the surface drawing and polishing process, the local instantaneous high temperature on the outer surface of the outer shell can be transmitted from the outside to the nanopores on the inner wall, but it will not affect the plastic body of the inner shell. Local instantaneous high temperature can help eliminate the surface stress between the metal substrate and the plastic. After drawing and polishing, ultrasonic cleaning is performed in warm water. The ultrasonic oscillation during ultrasonic cleaning can increase the crystallinity of nano-scale crystalline plastics (PBT or PPS) and improve its dimensional stability. The post-processing steps of surface polishing, drawing and ultrasonic cleaning can not only ensure the appearance of the outer shell, but also eliminate the long-term high-temperature baking process in the traditional nano injection molding process, greatly improving production efficiency.

[0055] Furthermore, during injection molding, the glue inlet is arranged at the rounded corner, and each rounded corner corresponds to a glue inlet. After the inner shell is molded, the glue inlet is cut off.

[0056] Through the above technical solution, the glue inlet is set near the rounded corners on all sides, strengthening the bonding strength between the rounded corners and the outer shell, helping it resist the shrinkage stress transmitted from the side walls of the inner shell. Nano injection molding requires very high plastic fluidity to ensure that the injection colloid quickly fills the nano-voids before the injection is cooled. Because the plastic at the glue inlet has just entered the outer shell and has not yet been cooled by the mold temperature, it has stronger fluidity, resulting in better bonding strength at the gate. At the same time, multiple rounded corners are provided, and multiple glue inlets are also provided. The design of multiple glue inlets can reduce filling and plastic cooling time, and improve plastic fluidity and bonding strength.

[0057] Furthermore, during injection molding, the first parting line of the mold is arranged along the side wall, the rounded corner portion and the arc support portion of the inner shell.

[0058] The above technical solution can enhance injection molding venting and improve bonding strength. By arranging the first parting line along the sidewalls, rounded corners, and arc support portions of the inner shell, a larger exhaust area can be provided for residual gas within the outer shell cavity as much as possible. Residual gas within the outer shell cavity can be smoothly discharged along the flow direction of the plastic injection molding, avoiding the problem of trapped gas, ensuring that the injection molding colloid and the nanopores are tightly bonded, and enhancing bonding strength.

[0059] Furthermore, during injection molding, an ejector pin is provided in the mold, and the ejector pin is suitable for abutting against the ejection portion.

[0060] Furthermore, during injection molding, a limiting rod is provided on the mold, and the limiting rod is arranged on the end face of the outer shell along the circumference of the outer shell; the limiting rod is provided with a first step, a second step and a third step, the first step abuts against the end face of the outer shell, the second step is suitable for being inserted into the inner shell, and the third step is suitable for abutting against the end face of the waterproof rib. After the inner shell is formed, when the second step is pulled out of the inner shell, an empty groove is formed on the inner shell.

[0061] With this technical solution, during nano-injection molding, the outer shell needs to be placed in the mold before injection molding. Positional deviation can lead to separation issues. However, the positioning rods, arranged along the outer shell's circumference and on its end faces, ensure the maximum possible positioning accuracy between the outer shell and the inner shell. The positioning rods also facilitate venting, preventing air from being trapped in the nano-scale pores and improving injection molding quality and bonding strength.

[0062] Furthermore, during injection molding, the mold is provided with an ejector rod, and the ejector rod is arranged on the end face of the outer shell along the circumference of the outer shell; the ejector rod is provided with a fourth step, a fifth step and a sixth step, the fourth step abuts against the end face of the outer shell, the fifth step is suitable for abutting against the wrapping layer, and the sixth step is suitable for abutting against the end face of the waterproof rib edge.

[0063] Through the above technical solution, the ejector rod can assist in supporting the outer shell, further improving the positioning accuracy between the outer shell and the inner shell, and at the same time facilitating the ejection of the injection-molded outer shell from the mold. At the same time, the setting of the ejector rod can also help with exhaust, avoiding air trapping in the nanopores and enhancing the bonding strength.

[0064] Furthermore, during preheating, the mold is provided with a sleeve matching the second embedded nut. When the mold is closed, the sleeve presses against the second embedded nut, so that the second embedded nut presses against the outer shell, and then the outer shell and the mold core in the mold press against each other, so that the mold core with higher heat can quickly heat the outer shell.

[0065] Through the above technical solution, after the mold is closed, the sleeve presses against the outer shell, so that the shell and the mold core are effectively tightly fitted and limited, ensuring that the outer shell is quickly heated by the high-temperature mold core inside the mold. This can eliminate the process of preheating metal parts outside the mold in traditional nano injection molding processes, greatly improving production efficiency.

[0066] Furthermore, during preheating, a spring is arranged on the top of the sleeve. When the mold is closed, the spring is in hard contact with the second embedded nut and the inner bottom surface of the outer shell at the same time. After injection molding, the spring is embedded in the injection molded nut part.

[0067] Furthermore, after the outer shell is demolded, the outer shell is subjected to temperature-equalizing shaping by a temperature-equalizing cooling and shaping tooling. The temperature-equalizing cooling and shaping tooling includes a temperature-equalizing inner core and a temperature-equalizing cover. The temperature-equalizing inner core is inserted into the inner shell and is fitted with the inner shell. The temperature-equalizing cover is in hard contact with the bottom surface of the main shell and is connected to the temperature-equalizing inner core by bolts.

[0068] With the above technical solution, after the outer shell and the inner shell are ejected from the mold, the overall temperature is relatively high. During the cooling process, the outer shell is made of metal, has high thermal conductivity, and has a large contact area with the air, so it cools quickly, while the inner shell is made of plastic, has poor thermal conductivity, and has a small contact area with the air, so it cools slowly. At the same time, the side walls of the inner shell with a small amount of glue cool down quickly, while the rounded corners with a large amount of glue cool down slowly. The difference in cooling speed will lead to a difference in shrinkage, which in turn causes the overall concave deformation of the shell, exacerbating the shrinkage force on the rounded corners. Therefore, after the inner shell is inserted into the temperature-averaging inner core, the temperature-averaging inner core, the outer shell, and the temperature-averaging cover are fixedly connected using bolts. The temperature-averaging inner core accelerates the cooling of the inner shell, thereby ensuring that the cooling speeds of the outer shell and the inner shell are consistent, reducing shrinkage stress. In addition, the temperature-averaging shaping tool can also ensure the overall dimensional stability of the outer shell and the inner shell, and provide support.

[0069] Furthermore, when the perspective observation window is hot-melt assembled, the observation window sealing ring is placed in the sealing groove, the hot-pressed cylinder is passed through the hot-pressing hole reserved on the outer shell, and the perspective observation window is fit to the outer shell. Then, the part of the hot-pressed cylinder passing through the hot-pressing hole is pressed by the hot-pressing plate, so that the diameter of the part of the hot-pressed cylinder passing through the hot-pressing hole is increased and in hard contact with the inner bottom surface of the outer shell, so as to fix the perspective observation window on the outer shell.

[0070] The beneficial effects of the present invention are:

[0071] 1. The arc support portion can support the inner shell and help the fillet portion resist the shrinkage force transmitted from the side wall of the inner shell. The bonding force between the reinforcing bottom plate and the bottom surface of the outer shell can cooperate with the arc support portion and be dispersed on the fillet portion along the height direction, further resisting the shrinkage force transmitted from the side wall of the inner shell. At the same time, the reinforcing bottom plate is not connected to the inner shell, which can avoid the possibility of the inherent shrinkage stress on the reinforcing bottom plate being transferred to the inner shell, thereby preventing it from aggravating the shrinkage force on the arc support portion. The arc support portion can use the entire bonding force between the reinforcing bottom plate and the outer shell to resist the shrinkage force it bears. In addition, the inner support plate can, on the one hand, strengthen the arc support portion and increase the bonding force between the arc support portion and the outer shell; on the other hand, it can support the arc support portion and the fillet portion, helping the fillet portion to resist the shrinkage force of the inner shell side wall and reducing the possibility of cracking or separation of the fillet portion from the outer shell.

[0072] 2. The composite double-layer shell based on nano injection molding has the advantages of high strength, light weight, good protection performance, good production consistency, excellent electromagnetic shielding performance, and simple production process. It is very suitable for use in electronic equipment underground in coal mines;

[0073] 3. By using a combination of preheating in the mold, cooling and shaping, wire drawing and polishing, and ultrasonic cleaning, while ensuring the bonding strength, the process of nano injection molding is simplified, including preheating of metal parts outside the mold, high-temperature baking and other processes, shortening the processing cycle and difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] The present invention will be further described below with reference to the accompanying drawings and examples.

[0075] FIG1 is a schematic structural diagram of the overall mining shell body according to the present invention.

[0076] FIG2 is a schematic diagram of an exploded structure embodying a perspective observation window in the present invention.

[0077] FIG3 is a schematic diagram showing the structure of a hot-pressed cylinder after hot pressing in the present invention.

[0078] FIG4 is a schematic diagram of the cross-sectional structure of the first wrapping layer in the present invention.

[0079] FIG5 is a schematic structural diagram of a transparent window support sheet according to the present invention.

[0080] FIG6 is a schematic diagram showing the overall structure of the mining shell cover in the present invention.

[0081] FIG. 7 is a schematic diagram of the exploded structure of the plastic skeleton and the sealing ring in the present invention.

[0082] FIG8 is a schematic diagram of the partial structure of the screw hole, the connection hole and the countersunk hole in the present invention.

[0083] FIG9 is a schematic diagram of a partial cross-section structure of the second wrapping layer in the present invention.

[0084] FIG10 is a schematic structural diagram of a mining shell according to the present invention.

[0085] FIG11 is a schematic structural diagram of the sleeve and ejector pin in the present invention.

[0086] FIG. 12 is a schematic structural diagram of a limit rod according to the present invention.

[0087] FIG13 is a schematic structural diagram of the ejector rod in the present invention.

[0088] FIG14 is a schematic structural diagram of the first parting line in the present invention.

[0089] FIG15 is a schematic structural diagram of the sleeve in the present invention.

[0090] FIG16 is a schematic structural diagram of a uniform temperature cooling and shaping tooling according to the present invention.

[0091] FIG17 is a schematic structural diagram of the push plate, the ejector block and the push pin in the present invention.

[0092] FIG18 is a schematic structural diagram of the second parting line in the present invention.

[0093] FIG19 is a schematic structural diagram of the first ejector rod and the second ejector rod in the present invention.

[0094] In the figure: 1. Outer shell; 11. Perspective window; 12. Hot pressing hole; 13. Perspective observation window; 131. Sealing groove; 132. Observation window sealing ring; 133. Hot pressing cylinder; 2. Inner shell; 31. Fillet; 311. Reduction groove; 32. Arc support; 33. Reinforced bottom plate; 331. Ejector; 332. Injection nut; 333. Second embedded nut; 34. Inner support; 341. Cover stud; 342. First embedded nut; 343. Reinforcement rib; 35. First wrapping layer; 36. Waterproof rib; 37. Perspective window support; 38. Perspective window fitting ring; 4. Cover plate; 41. Side; 411. Screw hole; 42. Plastic Skeleton; 421, second wrapping layer; 422, screw connection part; 4221, connection hole; 4222, countersunk hole; 423, reinforcement block; 424, sealing groove; 425, sealing ring; 4251, avoidance hole; 5, limit rod; 51, first step; 52, second step; 53, third step; 6, ejector rod; 61, fourth step; 62, fifth step; 63, sixth step; 7, ejector pin; 71, sleeve; 72, first parting line; 73, temperature-uniform core; 74, temperature-uniform cover; 75, second parting line; 761, push plate; 762, ejector block; 763, push pin; 771, first ejector rod; 772, second ejector rod; 78, gate. DETAILED DESCRIPTION

[0095] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0096] In a first aspect, the present invention discloses an outer shell for mining.

[0097] Referring to Figures 1 to 4, a mining shell includes an outer shell 1 and an inner shell 2. The inner shell 2 is injection molded inside the outer shell 1. The inner shell 2 is provided with a fillet portion 31 and an arc support portion 32. The arc support portion 32 is concave and arranged opposite to the fillet portion 31. There are four groups of fillet portions 31 and arc support portions 32. A reinforcing bottom plate 33 is integrally formed at the bottom of the arc support portion 32. The reinforcing bottom plate 33 is bonded to the inner bottom surface of the outer shell 1 by injection molding, but is not connected to the side wall of the inner shell 2. An inner support plate 34 is integrally formed between the arc support portion 32 and the inner shell 2. The inner support plate 34 is located at the bottom of the arc support portion 32 and is bonded to the inner bottom surface of the outer shell 1 by injection molding. The material of the outer shell 1 can be 304, with a wall thickness of 1-1.5 mm.

[0098] The arcuate support portion 32 supports the inner shell 2, helping the fillet 31 resist the contraction force transmitted from the inner shell 2 sidewalls. The bonding force between the reinforcing plate 33 and the bottom surface of the outer shell 1 cooperates with the arcuate support portion 32, distributing it along the height of the fillet 31 and further resisting the contraction force transmitted from the inner shell 2 sidewalls. Furthermore, the reinforcing plate 33 is not connected to the inner shell 2, which prevents the inherent contraction stress on the reinforcing plate 33 from being transferred to the inner shell 2, thereby preventing the contraction force on the arcuate support portion 32 from being aggravated. The arcuate support portion 32 can utilize the full bonding force between the reinforcing plate 33 and the outer shell 1 to resist the contraction force it is experiencing. Furthermore, the inner support plate 34 not only strengthens the arcuate support portion 32 and increases its bonding force with the outer shell 1, but also supports the arcuate support portion 32 and the fillet 31, helping the fillet 31 resist the contraction force of the inner shell 2 sidewalls and reducing the possibility of the fillet 31 cracking or separating from the outer shell 1.

[0099] A closing stud 341 is integrally formed on the inner support plate 34, and a first embedded nut 342 is provided inside the closing stud 341, and the first embedded nut 342 is suitable for connecting with the cover plate. During injection molding, the positions of the outer shell 1 and the first embedded nut 342 are first determined by the mold, and then the closing stud 341 is molded by injection molding. At this time, the first embedded nut 342 is also covered and fixed by the closing stud 341. The closing stud 341 is connected to the arc support portion 32 by reinforcing ribs 343, and the reinforcing ribs 343 are arranged in pairs. The reinforcing ribs 343 can support the arc support portion 32 and enhance the structural strength of the closing stud 341. Because the reinforcing ribs 343 are not connected to the fillet portion 31, they will not increase the contraction force borne by the fillet portion 31. In this embodiment, there are four groups of closing studs 341 and first embedded nuts 342, and they are located at the four corner points of the inner shell 2.

[0100] A first wrapping layer 35 is integrally formed on the inner shell 2. The first wrapping layer 35 is injection-molded with the end face of the outer shell 1. The first wrapping layer 35 is used to increase the bonding area between the metal and the plastic, providing tensile stress to resist the shrinkage force for the rounded corners 31 on all sides. In addition, the first wrapping layer 35 can serve as a mounting and fixing surface connected to the cover plate. The flatness of the plastic-molded first wrapping layer 35 as a fixing surface is higher than the flatness of the end face of the outer shell 1, which can reduce the requirements for the flatness of the end face of the outer shell 1 and reduce the processing difficulty of the outer shell 1.

[0101] A reduction groove 311 is defined inside the fillet 31 and extends along its height. The reduction groove 311 locally reduces the wall thickness of the fillet 31. Because the bonding force only takes effect at the interface between the outer shell 1 and the inner shell 2, this localized reduction in wall thickness does not affect the bonding force at that location, but does reduce the inherent shrinkage force generated by injection molding at that location.

[0102] An ejector portion 331 is integrally formed on the side of the reinforcing bottom plate 33 and connected to the bottom surface of the outer shell 1. This ejector portion 331 not only strengthens the bonding strength between the reinforcing bottom plate 33 and the inner bottom surface of the outer shell 1, but also provides a support for the ejector pins 7. Compared to ejector pins 7 directly abutting the inner bottom surface of the outer shell 1, the combined ejector portion 331 and the inner bottom surface of the outer shell 1 provide a stronger load-bearing capacity and are less susceptible to deformation of the outer shell 1. Providing multiple ejector portions 331 allows for simultaneous ejection of multiple ejector pins 7, improving the smoothness of the movement of the outer shell 1 and inner shell 2 during ejection.

[0103] A waterproof rib 36 is integrally formed on the end face of the inner shell 2. The waterproof rib 36 is arranged around the circumference of the inner shell 2 and is in a closed state. The waterproof rib 36 is suitable for cooperating with the cover plate, thereby improving the stability and sealing of the connection between the outer shell 1 and the cover plate.

[0104] An injection-molded nut portion 332 is integrally formed on the reinforcing plate 33. A second embedded nut 333 is positioned within the injection-molded nut portion 332, which forms hard contact with the bottom surface of the outer shell 1. The injection-molded nut portion 332 facilitates securing the second embedded nut 333 to the outer shell 1 through injection molding. The hard contact between the second embedded nut 333 and the inner bottom surface of the outer shell 1 facilitates electrical connection between the outer shell 1 and the second embedded nut 333. Since the second embedded nut 333 is later used to mount a circuit board, this facilitates electrical connection between the outer shell 1 and the circuit board, facilitating grounding of the circuit board through the metal outer shell 1 and improving the electromagnetic compatibility of the internal electronic components. In this embodiment, four reinforcing plates 33, four injection-molded nut portions 332, and four second embedded nuts 333 are provided, with each reinforcing plate 33 having a set of injection-molded nut portions 332 and second embedded nuts 333.

[0105] In another embodiment, a spring is provided within the injection-molded nut portion 332, and the spring is in hard contact with both the second insert nut 333 and the outer shell 1, thereby ensuring electrical connection between the second insert nut 333 and the outer shell 1. The spring ensures effective electrical connection between the second insert nut 333 and the outer shell 1, thereby preventing contact failure caused by dimensional fluctuations of the second insert nut 333.

[0106] Referring to Figures 1 to 3, the outer shell 1 is provided with a perspective window 11. A perspective observation window 13 is also affixed to the outer bottom surface of the outer shell 1. The perspective observation window 11 is covered by a sealing groove 131, which contains an observation window sealing ring 132. A heat-pressing cylinder 133 is integrally formed on the perspective observation window 13. Several heat-pressing cylinders 133 are arranged in an array circumferentially around the perspective window 11. Heat-pressing holes 12 are provided on the bottom surface of the outer shell 1 for the heat-pressing cylinders 133 to pass through. Multiple heat-pressing holes 12 are arranged in an array circumferentially around the perspective window 11, corresponding one-to-one with each heat-pressing cylinder 133. During installation, the perspective observation window 13 is fitted onto the outer bottom surface of the outer shell 1. At this time, the front end of the hot pressing cylinder 133 passes through the hot pressing hole 12. Then, the part of the hot pressing cylinder 133 passing through the hot pressing hole 12 is deformed by hot pressing and anchored on the inner surface of the outer shell 1, thereby fixing the perspective observation window 13 to the outer shell 1.

[0107] In another embodiment, the first embedded nut 342 can be welded to the inner bottom surface of the outer shell 1. By welding the first embedded nut 342 to the inner surface of the outer shell 1, the first embedded nut 342 can support the cover stud 341, thereby supporting the arc support portion 32 and the rounded corner portion 31, and helping to withstand the contraction force exerted on the rounded corner portion 31. The contraction force exerted on the rounded corner portion 31 is no greater than the bonding force between the rounded corner portion 31 and the outer shell 1.

[0108] In another embodiment, referring to FIG5 , a window support sheet 37 is injection molded onto the see-through window 11, and the hot-pressing holes 12 are provided on the window support sheet 37. Providing the hot-pressing holes 12 on the window support sheet 37 eliminates the need for holes in the outer shell 1, reducing the manufacturing difficulty of the outer shell 1. Furthermore, the plastic-molded window support sheet 37 has a higher flatness than the outer shell 1, making the fixation of the see-through observation window 13 more reliable. The window support sheet 37 is integrally injection molded with the reinforcing bottom sheet 33, which increases the support force for the arc support portion 32 and the overall strength of the inner shell 2. A window fitting ring 38 is also integrally molded onto the window support sheet 37. The window fitting ring 38 is configured to fit against the sidewall of the see-through window 11. The window fitting ring 38 strengthens the bonding force between the window support sheet 37 and the outer shell 1, enhancing the strength and stability of the window support sheet 37.

[0109] The side walls of the outer shell can be provided with blind holes or through holes to facilitate the installation of other components. The inner shell can also be provided with ribs to facilitate the positioning or positioning of other components, such as providing installation space for speakers.

[0110] In a second aspect, the present invention discloses a mining shell.

[0111] 6 to 9 , a mining shell, used in conjunction with the above-mentioned mining shell body, includes a cover plate body 4 , which is connected to the shell body 1 by screws.

[0112] The cover body 4 has a side edge 41 integrally formed along its circumference. A plastic frame 42 is injection-molded within the cover body 4 and positioned in close proximity to both the cover body 4 and the side edge 41. A second wrapping layer 421 is integrally formed on the plastic frame 42 and connected to the end of the side edge 41 distal from the cover body 4. The second wrapping layer 421 is adapted to abut against the outer shell.

[0113] A sealing groove 424 is provided on the plastic frame 42 and is arranged around the circumference of the cover body 4 to form a closed ring. A sealing ring 425 is provided in the sealing groove 424 to improve the sealing between the cover body 4 and the outer shell 1.

[0114] The four corners of the cover plate 4 are rounded. Screw holes 411 are provided on the cover plate 4. Screw connection portions 422 are located within the sealing grooves 424. Screw connection portions 422 are positioned close to the rounded corners. Interconnecting connection holes 4221 and countersunk holes 4222 are provided on the screw connection portions 422. Both connection holes 4221 and countersunk holes 4222 are coaxially arranged with screw holes 411. Countersunk holes 4222 facilitate sinking the heads of the bolts connecting the outer shell 1 to the cover plate, enhancing the overall aesthetics. Connection holes 4221 facilitate the passage of bolts connecting the outer shell 1 to the cover plate 4. A clearance hole 4251 is provided on the sealing ring 425, and the screw connection portion 422 is located within the clearance hole 4251.

[0115] The plastic frame 42 is also provided with a reinforcement block 423, which is connected to the cover body 4. Four reinforcement blocks 423 are provided, one located in the middle of each side of the cover body 4. The reinforcement blocks 423 facilitate improving the bonding strength between the plastic frame 42 and the cover body 4, while also increasing the strength of the plastic frame 42.

[0116] The cover body 4 can be made of 304 material with a wall thickness of 1-1.5 mm.

[0117] In a third aspect, the present invention discloses a mining shell.

[0118] A mining shell, referring to FIG10 , comprises the above-mentioned mining shell body and a cover plate, wherein the cover plate is connected to the mining shell body by bolts.

[0119] In a fourth aspect, the present invention discloses a sensor.

[0120] A sensor adopts the above-mentioned mining shell as its shell.

[0121] In a fifth aspect, the present invention discloses a process for manufacturing a mining shell.

[0122] A manufacturing process for a mining shell, based on the above-mentioned mining shell, with reference to Figures 11 to 15, includes the following steps:

[0123] S1 , stamping: stamping the metal plate to obtain an outer shell 1 .

[0124] S2. Chemical treatment: Alkaline and acid washing are performed on the outer shell 1. The inner surface of the outer shell 1 is then treated with a treatment solution to form nanoscale pores. The treatment solution includes sodium acetate, sodium phosphate, disodium hydrogen phosphate, EDTA, and water. The sodium acetate content is 20-40 g / L, the sodium phosphate content is 5-30 g / L, the disodium hydrogen phosphate content is 10-30 g / L, the EDTA content is 1-20 g / L, and the remainder is water.

[0125] S3, preheating, placing the outer shell 1 into the mold and preheating it through the mold.

[0126] The glue inlet during injection molding is set at the rounded corner 31. Since there are four rounded corners 31, there are also four glue inlets. The glue inlet is set near the rounded corners 31 on all sides to enhance the bonding strength between the rounded corners 31 and the outer shell 1, helping it to resist the shrinkage stress transmitted from the side wall of the inner shell 2. Nano injection molding has very high requirements on the fluidity of the plastic to ensure that the injection colloid quickly fills the nano-voids before the injection is cooled. The plastic at the glue inlet has just entered the outer shell 1 and has not yet been cooled by the mold temperature, so it has stronger fluidity, so the bonding strength at the gate is also better. At the same time, the design of multiple glue inlets can reduce the filling and plastic cooling time, and improve the fluidity and bonding strength of the plastic. After the inner shell 2 is injection molded, the gate 78 formed by the glue inlet can be removed by CNC.

[0127] Specifically, referring to Figures 1 and 11 to 13 , the mold is provided with a limiting rod 5 , which is arranged on the end face of the outer shell 1 along the circumference of the outer shell 1 . The limiting rod 5 is provided with a first step 51 , a second step 52 , and a third step 53 . The first step 51 abuts against the end face of the outer shell 1 , the second step 52 is adapted to be inserted into the inner shell 2 , and the third step 53 abuts against the end face of the waterproof rib 36 . After the inner shell 2 is formed, when the second step 52 is removed from the inner shell 2 , a vacant groove 79 is formed in the inner shell 2 . The mold is provided with an ejector rod 6 , which is arranged on the end face of the outer shell 1 along the circumference of the outer shell 1 . The ejector rod 6 is provided with a fourth step 61 , a fifth step 62 , and a sixth step 63 . The fourth step 61 abuts against the end face of the outer shell 1 , the fifth step 62 abuts against the first wrapping layer 35 , and the sixth step 63 abuts against the end face of the waterproof rib 36 . During nano-injection molding, the outer shell 1 needs to be placed in the mold before injection molding. Positional deviation can lead to separation issues. However, the positioning rods 5 are arranged along the circumference of the outer shell 1 on its end face, ensuring the maximum possible positioning accuracy between the outer shell 1 and the inner shell 2. The ejector rods 6 provide additional support for the outer shell 1, further improving the positioning accuracy between the outer shell 1 and the inner shell 2.

[0128] The mold is further provided with an ejector pin 7 , which is suitable for abutting against the ejection portion 331 , so as to facilitate ejecting the outer shell 1 and the inner shell 2 from the mold together when demolding.

[0129] 14 , the first parting line 72 of the mold is arranged along the side wall, the rounded corner portion 31 and the arc support portion 32 of the inner shell 2, which can provide as much discharge area as possible for the residual gas inside the cavity of the outer shell 1. The residual gas inside the cavity of the outer shell 1 can be discharged smoothly along the flow direction of the plastic injection molding, avoiding the problem of trapped gas, ensuring that the injection colloid is tightly combined with the nanopores, and enhancing the bonding strength.

[0130] 11 and 15 , the mold is provided with a sleeve 71 that matches the second embedded nut 333. When the mold is closed, the sleeve 71 presses against the second embedded nut 333, so that the second embedded nut 333 presses against the outer shell 1, and then the outer shell 1 is pressed against the core in the mold, so that the core with higher heat can quickly heat the outer shell 1, and the outer shell 1 can be preheated through the mold. This can eliminate the process of separately preheating metal parts outside the mold in the traditional nano injection molding process, thereby greatly improving production efficiency.

[0131] During injection molding, the mold positions and limits the outer shell 1 through the limiting rod 5 and the ejector rod 6, and then limits the first embedded nut 342 and the second embedded nut 333 through the sleeve 71. Each first embedded nut 342 and the second embedded nut 333 corresponds to a sleeve 71, and the sleeve 71 can be a stepped sleeve 71. Then the mold is closed. When closing the mold, the sleeve 71 presses against the second embedded nut 333, so that the second embedded nut 333 presses against the outer shell 1, and then the outer shell 1 is pressed against the mold core in the mold, so that the mold core with a higher temperature can quickly heat the outer shell 1, and the outer shell 1 is preheated through the mold.

[0132] S4, injection molding. After preheating is completed, injection molding is performed through the glue inlet. After the mold cavity between the outer shell 1 and the mold core is filled, injection molding is stopped and the inner shell 2 is allowed to solidify.

[0133] The nano-injection molding material used during injection molding can be modified nano-grade PBT or PPS.

[0134] S5, demoulding. After the inner shell 2 is solidified, the molds are separated, and the outer shell 1 is ejected from the mold core by the ejector pin 7. Then, the outer shell 1 and the inner shell 2 that are combined into one are taken away.

[0135] S6, machining, removing the gate left by the glue inlet on the inner shell 2 by machining;

[0136] S7, uniform temperature cooling and shaping: after the outer shell 1 is ejected from the mold, the outer shell 1 is subjected to uniform temperature shaping by a uniform temperature cooling and shaping tool.

[0137] Specifically, with reference to Figure 16, the temperature-averaging cooling and shaping tooling includes a temperature-averaging inner core 73 and a temperature-averaging cover 74. The temperature-averaging inner core 73 is inserted into the inner shell 2 and is fitted with the inner shell 2. The temperature-averaging cover 74 is in hard contact with the bottom surface of the main shell, and is connected to the temperature-averaging inner core 73 through bolts passing through the perspective window 11, thereby reliably fitting the temperature-averaging inner core 73 to the inner shell 2. In order to ensure that all parts of the inner shell 2 can be cooled evenly, the side walls of the temperature-averaging hot core are all adapted to the inner shell 2, ensuring that the fillet 31, the injection-molded nut portion 332, etc. on the inner shell 2 can fit with the temperature-averaging hot core, ensuring the uniformity of cooling and reducing the generation of stress. In addition, the temperature-averaging shaping tooling can also provide support to ensure the overall dimensional stability of the outer shell 1 and the inner shell 2.

[0138] S8: Polishing: External housing 1 is polished and brushed. During the brushing and polishing process, the localized transient high temperature on the outer surface of external housing 1 can be transferred from the outside to the nanopores in the inner wall without affecting the plastic body of inner housing 2. This localized transient high temperature helps eliminate surface stress between the metal substrate and the plastic.

[0139] S9. Cleaning: Ultrasonic cleaning of the outer shell 1. After brushing and polishing, ultrasonic cleaning is performed in warm water. The ultrasonic vibrations during ultrasonic cleaning can increase the crystallinity of the nano-crystalline plastic (PBT or PPS) and improve its dimensional stability. The post-processing steps of surface polishing, brushing, and ultrasonic cleaning can not only maintain the appearance of the outer shell 1, but also eliminate the long-term high-temperature baking process in traditional nano-injection molding processes, greatly improving production efficiency.

[0140] S10. Hot-melt assembly of the perspective observation window 13. Referring to Figures 1 and 2, place the observation window sealing ring 132 in the sealing groove 131, pass the hot-pressing cylinder 133 through the hot-pressing hole 12 reserved on the outer shell 1, and make the perspective observation window 13 fit the outer shell 1. Then, press the part of the hot-pressing cylinder 133 passing through the hot-pressing hole 12 through the hot-pressing plate, so that the diameter of the part of the hot-pressing cylinder 133 passing through the hot-pressing hole 12 increases and is in hard contact with the inner bottom surface of the outer shell 1, so as to fix the perspective observation window 13 on the outer shell 1.

[0141] In a sixth aspect, the present application discloses a process for manufacturing a mining shell cover.

[0142] A manufacturing process for a mining shell cover plate comprises the following steps:

[0143] S1 . Stamping: Stamping the metal plate to obtain a cover plate body 4 having side edges 41 .

[0144] S2. Chemical treatment: Alkaline and acid wash the inner surfaces of the cover body 4 and side edges 41. Then, the inner surfaces of the cover body 4 and side edges 41 are treated with a treatment solution to etch nanoscale pores. The treatment solution includes sodium acetate, sodium phosphate, disodium hydrogen phosphate, EDTA, and water. The sodium acetate content is 20-40 g / L, the sodium phosphate content is 5-30 g / L, the disodium hydrogen phosphate content is 10-30 g / L, the EDTA content is 1-20 g / L, and the remainder is water.

[0145] S3, preheating, placing the cover plate body 4 into the mold, and preheating the cover plate body 4 through the heat on the mold.

[0146] Specifically, referring to Figure 17 , the mold is provided with a supporting mechanism comprising a push plate 761, a top block 762, and a push pin 763. The push plate 761 is in hard contact with the cover body 4, forming a closed space along the circumference of the plastic frame 42 and located within the plastic frame 42. The top block 762 is disposed within the push plate 761 and in hard contact with the cover body 4. The push pin 763 is disposed within the push plate 761 and in hard contact with the cover body 4. The push pin 763 is disposed around the circumference of the push plate 761, providing more uniform support for the cover body 4. Hard contact refers to direct contact or abutment.

[0147] After the mold is closed, the push plate 761, ejector block 762, and push pin 763 press against the cover body 4, ensuring a tight fit and positional positioning between the cover body 4 and the mold core. This ensures that the cover body 4 is rapidly heated by the high-temperature core inside the mold. This eliminates the need for separate preheating of metal parts outside the mold, as is done in traditional nano-injection molding processes, significantly improving production efficiency. Furthermore, the push plate 761 and push pin 763 assist in ejecting the cover body 4 from the mold.

[0148] S4, injection molding, injection molding a plastic skeleton 42 in the cover body 4;

[0149] Specifically, the glue inlets are located at screw holes 411, with each screw hole 411 having a glue inlet. This multiple glue inlet design reduces filling and plastic cooling time, improving plastic fluidity and bonding strength. Placing the glue inlets at screw holes 411, i.e., near the fillet, significantly enhances the plastic bonding strength at the fillet, helping it resist shrinkage stress transmitted from the sidewalls of the plastic frame 42.

[0150] Specifically, referring to Figure 18 , the mold's second parting line 75 is positioned along the inner contour of the sealing groove 424 to enhance injection venting and improve bonding strength. By positioning the second parting line 75 along the inner contour of the sealing groove 424, a larger venting area is provided as much as possible for residual air within the injection molding cavity of the cover plate body 4. Residual air within the injection molding cavity of the cover plate body 4 can be smoothly discharged along the flow direction of the plastic injection molding process, avoiding air entrapment and ensuring a tight bond between the injection molding colloid and the nanopores, thereby enhancing bonding strength.

[0151] The nano-injection molding material used during injection molding can be modified nano-grade PBT or PPS.

[0152] S5, demoulding, ejecting the cover plate body 4 from the mold to release it from the mold.

[0153] Specifically, referring to Figure 19 , the mold is equipped with an ejection mechanism comprising a first ejector pin 771 and a second ejector pin 772 . The first ejector pin 771 is adapted to abut against the screw connection portion 422 , i.e., four first ejector pins 771 are provided; the second ejector pin 772 is adapted to abut against the reinforcement block 423 , i.e., four second ejector pins 772 are provided. After the plastic skeleton 42 solidifies and forms, the first and second ejector pins 771 and 772 eject the entire plastic skeleton 42 and cover plate 4 from the mold, achieving demolding. The presence of a larger number of ejector pins significantly enhances mold venting and improves the plastic bonding strength. Furthermore, it reduces the pressure exerted on the cover plate 4 during ejection, preventing deformation. Furthermore, the second ejector pin 772 abuts against the reinforcement block 423 , leveraging the bearing capacity of the reinforcement block 423 combined with the cover plate 4 to counteract the thrust exerted by the second ejector pin 772 , further reducing the possibility of deformation of the cover plate 4.

[0154] S6. Machining: removing the gate generated by the glue inlet on the cover body 4 by CNC machining, and machining the connecting hole 4221 and the countersunk hole 4222.

[0155] S7: Polishing and brushing: The outer surface of the cover body 4 is polished and brushed to improve the surface quality. During the brushing and polishing process, the localized transient high temperature on the outer surface of the cover body 4 can be transferred from the outside to the nano-pores on the inner wall without affecting the plastic body of the plastic skeleton 42. This localized transient high temperature helps eliminate surface stress between the metal substrate and the plastic.

[0156] S8: Ultrasonic cleaning: Perform ultrasonic cleaning on the cover body 4 to remove impurities on its surface. After brushing and polishing, ultrasonic cleaning is performed in warm water. The ultrasonic vibrations during ultrasonic cleaning can increase the crystallinity of the nano-crystalline plastic (PBT or PPS) and improve its dimensional stability. The post-processing steps of surface polishing, brushing, and ultrasonic cleaning not only maintain the appearance of the cover body 4, but also eliminate the long, high-temperature baking process required in traditional nano-injection molding, greatly improving production efficiency.

[0157] With the above-described preferred embodiments of the present invention as inspiration, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A mining shell, characterized in that: include An outer shell (1); An inner shell (2), the inner shell (2) being injection-molded inside the outer shell (1), and the inner shell (2) being provided with a rounded corner portion (31); A circular arc support portion (32), the circular arc support portion (32) being concavely arranged and corresponding to the rounded corner portion (31) of the inner shell (2); A reinforcing bottom sheet (33), wherein the reinforcing bottom sheet (33) is connected to the arc support portion (32) and the bottom surface of the outer shell (1) at the same time, and the reinforcing bottom sheet (33) is not connected to the inner shell (2); An inner support sheet (34), the inner support sheet (34) is arranged between the circular arc support portion (32) and the inner shell (2), and is located at the bottom of the circular arc support portion (32), and the inner support sheet (34) is simultaneously connected to the inner shell (2), the circular arc support portion (32) and the outer shell (1).

2. The mining shell according to claim 1, characterized in that: The inner support sheet (34) is connected with a cover stud (341), and a first embedded nut (342) is arranged inside the cover stud (341), and the first embedded nut (342) is suitable for connecting with the cover plate; The cover closing stud (341) is connected to the arc support portion (32) via a reinforcing rib (343); The reinforcing ribs (343) are arranged in pairs.

3. The mining shell according to claim 2, characterized in that: The inner shell (2) is provided with a first wrapping layer (35), and the first wrapping layer (35) is connected to the end surface of the outer shell (1); A reduction groove (311) is provided on the inner side of the arc portion, and the reduction groove (311) is arranged along the height direction; A protruding portion (331) is provided on the side surface of the reinforcing bottom sheet (33), and the protruding portion (331) is connected to the bottom surface of the outer shell (1); The end surface of the inner shell (2) is provided with a waterproof rib (36), the waterproof rib (36) is arranged around the circumference of the inner shell (2) and is in a closed state, and the waterproof rib (36) is suitable for cooperating with the cover plate; An injection-molded nut portion (332) is provided on the reinforcing bottom sheet (33), a second embedded nut (333) is provided inside the injection-molded nut portion (332), the second embedded nut (333) is in hard contact with the bottom surface of the outer shell (1), and the second embedded nut (333) is suitable for connecting with a circuit board; A spring is arranged inside the injection-molded nut portion (332), and the spring is in hard contact with the second embedded nut (333) and the outer shell (1) at the same time, so that the second embedded nut (333) and the outer shell (1) are electrically connected. The outer shell (1) is provided with a perspective window (11), and the outer shell (1) is also connected with a perspective observation window (13), the perspective observation window (13) covers the perspective window (11) and is in contact with the outer surface of the outer shell (1), the perspective observation window (13) is provided with a sealing groove (131), and an observation window sealing ring (132) is provided in the sealing groove (131); A hot pressing cylinder (133) is provided on the perspective observation window (13), and a hot pressing hole (12) for the hot pressing cylinder (133) to pass through is provided on the bottom surface of the outer shell (1), and the hot pressing hole (12) is arranged around the perspective window (11), and the portion of the hot pressing cylinder (133) passing through the hot pressing hole (12) is deformed by hot pressing and anchored on the inner surface of the outer shell (1); 4. The mining shell according to claim 2, characterized in that: The first embedded nut (342) is welded to the inner bottom surface of the outer shell (1).

5. The mining shell according to claim 3, characterized in that: A transparent window support sheet (37) is injection molded on the transparent window (11), and the hot pressing hole position (12) is arranged on the transparent window support sheet (37); The transparent window support sheet (37) is connected to the reinforcing bottom sheet (33); A transparent window fitting ring (38) is provided on the transparent window support sheet (37), and the transparent window fitting ring (38) is arranged to fit the side wall of the transparent window (11).

6. A mining shell, used in conjunction with the mining shell body according to any one of claims 1 to 5, characterized in that: It comprises a cover plate body (4), wherein the cover plate body (4) is connected to the outer shell (1).

7. The mining housing according to claim 6, characterized in that: The cover plate body (4) is provided with a side edge (41) along its circumference; a plastic frame (42) is provided inside the cover plate body (4), and the plastic frame (42) is arranged close to the cover plate body (4) and the side edge (41); a second wrapping layer (421) is connected to the plastic frame (42), and the second wrapping layer (421) is connected to an end of the side edge (41) away from the cover plate body (4), and the second wrapping layer (421) is suitable for abutting against the outer shell; The plastic frame (42) is provided with a sealing groove (424), the sealing groove (424) is arranged around the circumference of the cover plate body (4) to form a closed ring, and a sealing ring (425) is provided in the sealing groove (424); The four corner points of the cover plate body (4) are all provided with rounded corners, the cover plate body (4) is provided with a screw hole (411), a screw connection portion (422) is provided in the sealing groove (424), the screw connection portion (422) is provided close to the rounded corner, the screw connection portion (422) is provided with a connecting hole (4221) and a countersunk hole (4222) that are interconnected, and the connecting hole (4221) and the countersunk hole (4222) are both coaxially arranged with the screw hole (411); The sealing ring (425) is provided with an avoidance hole (4251), and the screw connection portion (422) is arranged in the avoidance hole (4251); The plastic frame (42) is also provided with a reinforcing block (423), and the reinforcing block (423) is connected to the cover body (4). There are four reinforcing blocks (423), which are respectively located in the middle of each side of the cover body (4).

8. A sensor, characterized in that: The mining shell as claimed in claim 7 is used as the shell.

9. A manufacturing process for a mining shell, based on the mining shell according to claim 3, characterized in that: The steps include: S1, stamping, stamping the metal plate to obtain an outer shell (1); S2, chemical treatment, treating the inner surface of the outer shell (1) with a treatment solution to form nanoscale pores; S3, preheating, placing the outer shell (1) into a mold and preheating the mold; S4, injection molding, injection molding the inner surface of the outer shell (1) to obtain the inner shell (2); S5, demoulding, taking the outer shell (1) out of the mold; S6, polishing, polishing and drawing the outer shell (1); S7, cleaning, performing ultrasonic cleaning on the outer shell (1); S8, hot-melt assembly of the perspective observation window (13), installing the perspective observation window (13) on the outer shell (1) by hot-melt.

10. The manufacturing process of the mining shell body according to claim 9, characterized in that: During injection molding, the glue inlet is arranged at the rounded corner (31), each rounded corner (31) corresponds to a glue inlet, and after the inner shell (2) is molded, the glue inlet is cut off by machining; During injection molding, the first parting line (72) of the mold is arranged along the side wall, the rounded corner portion (31) and the arc support portion (32) of the inner shell (2); During injection molding, an ejector pin (7) is provided in the mold, and the ejector pin (7) is suitable for abutting against the ejection portion (331); During injection molding, a limiting rod (5) is provided on the mold, and the limiting rod (5) is arranged on the end surface of the outer shell (1) along the circumference of the outer shell (1); The limiting rod (5) is provided with a first step (51), a second step (52) and a third step (53); the first step (51) is in contact with the end surface of the outer shell (1); the second step (52) is suitable for being inserted into the inner shell (2); the third step (53) is suitable for being in contact with the end surface of the waterproof rib (36); after the inner shell (2) is formed, when the second step (52) is pulled out of the inner shell (2), an empty groove is formed on the inner shell (2); During injection molding, the mold is provided with an ejector rod (6), and the ejector rod (6) is arranged on the end surface of the outer shell (1) along the circumference of the outer shell (1); The ejector rod (6) is provided with a fourth step (61), a fifth step (62) and a sixth step (63); the fourth step (61) abuts against the end surface of the outer shell (1); the fifth step (62) is suitable for abutting against the wrapping layer; and the sixth step (63) is suitable for abutting against the end surface of the waterproof rib (36). During preheating, the mold is provided with a sleeve (71) matched with the second embedded nut (333). When the mold is closed, the sleeve (71) presses against the second embedded nut (333), so that the second embedded nut (333) presses against the outer shell (1), thereby pressing the outer shell (1) against the mold core in the mold, so that the mold core with a relatively high temperature can quickly heat the outer shell (1); During preheating, a spring is arranged on the top of the cylinder (71). When the mold is closed, the spring is in hard contact with the second embedded nut (333) and the inner bottom surface of the outer shell (1). After injection molding, the spring is embedded in the injection nut part (332); After the outer shell (1) is ejected from the mold, the outer shell (1) is subjected to temperature-equalizing shaping by a temperature-equalizing cooling shaping tool, wherein the temperature-equalizing cooling shaping tool comprises a temperature-equalizing inner core (73) and a temperature-equalizing cover (74), wherein the temperature-equalizing inner core (73) is inserted into the inner shell (2) and is arranged in close contact with the inner shell (2), and the temperature-equalizing cover (74) is in hard contact with the bottom surface of the main shell and is connected to the temperature-equalizing inner core (73) by bolts; When the perspective observation window (13) is assembled by hot-melt, the observation window sealing ring (132) is placed in the sealing groove (131), the hot-pressing cylinder (133) is passed through the hot-pressing hole (12) reserved on the outer shell (1), and the perspective observation window (13) is made to fit the outer shell (1). Subsequently, the portion of the hot-pressing cylinder (133) passing through the hot-pressing hole (12) is pressed by a hot-pressing plate, so that the diameter of the portion of the hot-pressing cylinder (133) passing through the hot-pressing hole (12) is increased and hard-contacted with the inner bottom surface of the outer shell (1), so that the perspective observation window (13) is fixed to the outer shell (1).

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