A mold processing device for producing an electrical insulation member and a processing method thereof

Abstract

The application discloses a mold processing equipment for electrical insulation piece production and a processing method thereof, and belongs to the technical field of mold processing equipment.The device comprises a processing fixed machine tool, a pressing assembly, a polishing assembly and a mold.The device replaces conventional mechanical contact type polishing with fluid carrying magnetic particles, forms a polishing gap by extending a cavity block into a mold cavity, drives two polishing liquids by double-circuit independent circulation, cooperates with graded filtration and Hall sensor closed-loop control, simultaneously separates the polishing gap into two sections by a ring-shaped sealing member, performs micro-cutting on large-diameter particles in the upper section and fine polishing on small-diameter particles in the lower section, and adjusts the magnetic field intensity by a magnetic coil to realize roughness gradient transition, so that the surface of the mold cavity has an optimal window for vacuum adsorption and inhibition of field intensity concentration during collapse demolding;after the gradient morphology is transferred to the umbrella skirt, the micro-texture on the rain-approaching surface enhances the hydrophobic self-cleaning performance, the low roughness on the rain-backing surface reduces dirt adhesion, and the sufficient surface flashover voltage margin of the insulation piece under high-pressure working conditions is ensured.

Description

Technical Field

[0001] This invention relates to the field of mold processing equipment technology, and in particular to a mold processing equipment and processing method for the production of electrical insulation components. Background Technology

[0002] Electrical insulation components are key parts of high-voltage transmission lines. The insulating skirts of composite insulators are usually made of thermosetting insulating materials such as silicone rubber, epoxy resin or BMC / SMC, which are cross-linked and cured in a mold at high temperature. The surface quality of the inner wall of the mold cavity directly determines the demolding reliability and electrical performance of the insulating skirt. Therefore, high-precision grinding is required on the inner wall of the mold cavity during the mold manufacturing process.

[0003] However, existing mold processing equipment and grinding processes face multiple technical difficulties when handling molds for such insulating parts: First, the structural characteristics of the insulating skirt itself determine that its corresponding mold cavity has a large depth dimension. Conventional mechanical grinding heads or tools are limited by accessibility and rigidity, making it difficult to effectively and uniformly grind the entire depth range of the mold cavity. The bottom of the deep cavity often becomes a grinding blind zone. Second, during the curing process, thermosetting insulating materials form chemical adhesion with the cavity surface dominated by covalent and hydrogen bonds, and do not undergo significant volume shrinkage and springback after curing. When the surface roughness of the cavity is too low, a vacuum adsorption effect is formed between the product and the cavity, causing the demolding force to rise sharply. When the roughness is too high, the micro-protrusions on the skirt surface generate a field strength concentration effect under a high electric field, which greatly reduces the surface flashover voltage. The superposition of the above-mentioned demolding mechanical constraints and surface discharge physical constraints requires that the surface roughness of the inner wall of the mold cavity must be precisely controlled within the optimal window range that balances both. Existing grinding equipment cannot solve the basic problem of insufficient accessibility of deep cavities, and it also lacks the ability to precisely and controllably adjust the surface roughness during the grinding process. Summary of the Invention

[0004] This invention provides a mold processing equipment and method for the production of electrical insulation components, which can solve the fundamental problem that existing grinding equipment cannot solve the problem of insufficient accessibility to deep cavities, and also lacks the ability to precisely and controllably adjust the surface roughness during the grinding process.

[0005] A mold processing device for producing electrical insulation components includes: a fixed processing machine tool with a storage box installed at its bottom; a pressing assembly mounted on the fixed processing machine tool; a grinding assembly disposed on the fixed processing machine tool, the grinding assembly including a drive circulation block and a sealing grinding block, the drive circulation block being mounted on the upper side of the sealing grinding block, and a cavity block being installed at the bottom of the sealing grinding block; and a mold disposed below the grinding assembly, the mold having a mold cavity; wherein the cavity block matches the mold cavity and extends into the mold cavity, a grinding gap is formed between the outer wall of the cavity block and the inner wall of the mold cavity, and works with the drive circulation block and the storage box to achieve segmented differentiated grinding of the inner wall of the mold cavity.

[0006] Preferably, the pressing assembly includes a pressing table, which is mounted on a machining fixed machine tool. A servo motor is mounted on the pressing table, and a reciprocating lead screw is mounted on the output end of the servo motor. A screw sleeve is mounted around the reciprocating lead screw, and a pressing block is mounted around the screw sleeve. The pressing block is connected to a drive circulation block.

[0007] Preferably, a pair of limiting rods are installed on the pressing platform, and a pair of limiting rings are installed around the pressing block, with the limiting rods and limiting rings being slidably connected.

[0008] Preferably, both ends of the storage box are connected to integrated tubes, and each pair of integrated tubes is connected to the drive circulation block.

[0009] Preferably, the storage box is provided with an upper polishing chamber, a lower polishing chamber and a cleaning chamber, each of which is equipped with an electric valve. The upper polishing chamber is provided with upper polishing fluid, the lower polishing chamber is provided with lower polishing fluid, and the cleaning chamber is provided with cleaning fluid.

[0010] Preferably, the upper polishing fluid contains upper polishing magnetic particles, and the lower polishing fluid contains lower polishing magnetic particles. The particle size of the upper polishing magnetic particles is larger than that of the lower polishing magnetic particles. The upper polishing magnetic particles are irregularly angular particles, and the lower polishing magnetic particles are spherical particles.

[0011] Preferably, the drive circulation block has a first drive cavity and a second drive cavity, and a first drive pump and a second drive pump are respectively installed in the first drive cavity and the second drive cavity. The integrated tube is provided with a first hose connected to the first drive cavity and a second hose connected to the second drive cavity. The first hose and the second hose are respectively connected to the upper grinding cavity and the lower grinding cavity, and both the first hose and the second hose are connected to the cleaning cavity.

[0012] Preferably, an annular seal is installed at the outer end of the cavity block, which divides the grinding gap into an upper grinding gap and a lower grinding gap. A grinding channel is provided on the cavity block, and multiple upper grinding channels and multiple lower grinding channels are provided in the grinding channel. The upper grinding channels are all connected to the upper grinding gap and the first flexible tube, and the lower grinding channels are all connected to the lower grinding gap and the second flexible tube. Multiple uniformly distributed magnetic coils are embedded in the area of ​​the cavity block corresponding to the upper grinding gap. The leads of the magnetic coils are led out to the outside of the cavity block and connected to an external adjustable power supply.

[0013] Preferably, the bottom end of the sealing grinding block is equipped with multiple positioning rods, and the mold is provided with multiple positioning grooves that match the positioning rods.

[0014] The method for processing molds for producing electrical insulation components includes the following steps: S1: Installation and positioning: Place the mold on the lower side of the grinding component on the machining fixed machine tool, start the servo motor, and drive the pressing block through the reciprocating screw to drive the driving circulation block and the sealing grinding block to move down, so that the positioning rod is inserted into the positioning groove to complete the alignment, the cavity block extends into the mold cavity, and a grinding gap is formed between the outer wall of the cavity block and the inner wall of the mold cavity. The annular seal divides the grinding gap into an upper grinding gap and a lower grinding gap. S2: Upper section rough grinding: Open the electric valve of the upper grinding chamber, start the first drive pump, and pump the upper grinding liquid into the upper grinding gap through the first hose and the upper grinding channel for circulation. At the same time, adjust the output current of the external adjustable power supply to control the magnetic coil to generate a magnetic field of preset intensity, so that the upper grinding magnetic particles gather and stick to the inner wall of the upper section of the mold cavity under the action of the magnetic field. The irregular angular structure and large particle size of the upper grinding magnetic particles are used to rough grind the inner wall of the upper section of the mold cavity. S3: Lower section fine grinding: Open the electric valve of the lower grinding chamber, start the second drive pump, and pump the lower grinding fluid through the second hose into the lower grinding gap for circulation. Utilize the spherical structure and small particle size of the lower grinding magnetic particles to perform fine grinding on the inner wall of the lower section of the mold cavity. S2 and S3 can be performed simultaneously to achieve segmented and differentiated grinding of the inner wall of the mold cavity. S4: Circulation Cleaning: After polishing is completed, close the electric valves of the upper polishing chamber and the lower polishing chamber, open the electric valve of the cleaning chamber, and pump the cleaning fluid into the upper polishing gap and the lower polishing gap through the first drive pump and the second drive pump respectively, to circulate and wash away the residual polishing magnetic particles and debris on the inner wall of the mold cavity. The cleaning fluid carrying the residue flows back to the storage tank through the integrated pipe. S5: Demolding Inspection: After cleaning, close the electric valve of the cleaning chamber and the first and second drive pumps, start the servo motor to drive in reverse, and drive the pressing block to move upward through the reciprocating screw, so that the cavity block exits the mold cavity, the positioning rod disengages from the positioning groove, remove the mold, and inspect the grinding quality of the inner wall of the mold cavity. S6: Cyclic processing: If the test results do not meet the preset accuracy requirements, repeat steps S1 to S5, and adjust the current of the magnetic coil according to the test results to change the magnetic field strength, adjust the grinding pressure of the upper grinding magnetic particles on the inner wall of the upper section of the mold cavity, until the grinding accuracy of the inner wall of the mold cavity meets the production requirements of electrical insulation parts, and complete the mold processing.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This invention sets a cavity block at the bottom of the sealed grinding block and extends it into the mold cavity to form a grinding gap between it and the inner wall of the mold cavity. The fluid carries magnetic particles into the entire depth range of the mold cavity to replace the conventional mechanical contact grinding, which solves the bottleneck of deep cavity accessibility. The upper grinding cavity and the lower grinding cavity in the storage box are isolated from each other to store two different grinding fluids. Two independent drive pumps in the drive circulation block drive the two grinding fluids to circulate in their respective closed loops through their own independent hoses and grinding channels. The invention also uses closed-loop control methods such as graded filtration components in the integrated pipe return pipe section to intercept grinding debris, Hall sensor to monitor the concentration of residual particles in real time, and alternating demagnetization treatment after grinding to ensure that the entire depth range of the inner wall of the mold cavity can be thoroughly, uniformly and without secondary pollution.

[0016] (2) The present invention physically divides the grinding gap into an upper grinding gap and a lower grinding gap by installing an annular seal at the outer end of the cavity block. The upper section uses large-diameter irregular angular particles for micro-cutting, and the lower section uses small-diameter spherical particles for rolling and fine polishing. A magnetic coil is embedded in the area of ​​the cavity block corresponding to the upper grinding gap. The magnetic field strength is precisely controlled by an external adjustable power supply so that the roughness of the upper section wall is locked within the optimal window range that can open a sufficient micro air gap channel between the product and the cavity to disintegrate the vacuum adsorption effect when the thermosetting material is demolded, and does not affect the surface quality of the product due to excessive micro-protrusion height. The natural attenuation of the magnetic field along the axial direction makes the roughness transition smoothly from the upper section to the lower section and naturally connect with the fine polishing level. Thus, the gradient surface morphology required to ensure smooth demolding can be obtained in a single processing flow.

[0017] (3) After the gradient surface morphology of the present invention is transferred to the surface of the insulating umbrella skirt through the mold, the micro-texture of the rain-facing surface of the umbrella skirt, which is inherited from the moderately rough area of ​​the upper section of the mold cavity, can enhance the hydrophobicity of the lotus leaf effect, and promote the rainwater to carry the dirt particles to roll off to achieve passive self-cleaning. The low roughness surface of the rain-facing surface and the root transition area of ​​the umbrella skirt, which is inherited from the highly smooth area of ​​the lower section of the mold cavity, effectively reduces the adhesion and embedding of dirt particles. At the same time, the height of the micro-protrusions on all surfaces is controlled within a safe range that does not cause a significant field strength concentration effect, so that the insulating parts maintain sufficient surface flashover voltage margin under high voltage operating conditions. Finally, the mold processing accuracy, demolding reliability and electrical safety and anti-pollution flashover performance of the insulating products are synergistically improved. Attached Figure Description

[0018] Figure 1 A three-dimensional structural diagram of the mold processing equipment provided by the present invention; Figure 2 This is a three-dimensional structural diagram of the pressing component provided by the present invention; Figure 3 A three-dimensional side view of the mold processing equipment provided by the present invention; Figure 4 This is a three-dimensional structural diagram of the grinding component provided by the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the storage box provided by the present invention; Figure 6 A three-dimensional structural diagram of the sealing grinding block provided by the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the cavity block provided by the present invention; Figure 8 A three-dimensional structural diagram of the annular seal provided by the present invention; Figure 9 A schematic diagram of the three-dimensional structure of the grinding channel provided by the present invention; Figure 10 This is a schematic diagram of the polishing fluid flow direction provided by the present invention; Figure 11 This is a schematic diagram of the molded insulating component structure provided by the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Machining stationary machine tool; 2. Pressing assembly; 3. Grinding assembly; 4. Mold; 5. Drive circulation block; 6. Sealing grinding block; 21. Pressing table; 22. Servo motor; 23. Reciprocating lead screw; 24. Pressing block; 25. Limiting rod; 26. Limiting ring; 41. Mold cavity; 42. Positioning groove; 51. Integrated tube; 52. Storage box; 61. Cavity block; 62. Positioning rod; 63. Grinding channel; 64. Annular seal; 65. Grinding fluid inlet; 66. Grinding fluid outlet; 71. Insulating skirt; 72. Upper surface; 73. Lower surface. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 5 As shown in the figure, an embodiment of the present invention provides a mold processing equipment for the production of electrical insulation components, comprising: a processing fixed machine tool 1, with a storage box 52 installed at the bottom end of the processing fixed machine tool 1; a pressing assembly 2, which is installed on the processing fixed machine tool 1; a grinding assembly 3, which is disposed on the processing fixed machine tool 1, and includes a drive circulation block 5 and a sealing grinding block 6, with the drive circulation block 5 installed on the upper side of the sealing grinding block 6 and a cavity block 61 installed at the bottom end of the sealing grinding block 6; and a mold 4, which is disposed on the lower side of the grinding assembly 3, with a mold cavity 41 opened on the mold 4; wherein, the cavity block 61 matches the mold cavity 41 and extends into the mold cavity 41, and a grinding gap is formed between the outer wall of the cavity block 61 and the inner wall of the mold cavity 41, and works with the drive circulation block 5 and the storage box 52 to achieve segmented differentiated grinding of the inner wall of the mold cavity 41.

[0022] like Figure 2 As shown, the pressing assembly 2 includes a pressing table 21, which is mounted on the machining fixed machine tool 1. A servo motor 22 is mounted on the pressing table 21. A reciprocating lead screw 23 is mounted on the output end of the servo motor 22. A screw sleeve is mounted around the reciprocating lead screw 23. A pressing block 24 is mounted around the screw sleeve. The pressing block 24 is connected to the drive circulation block 5.

[0023] A pair of limit rods 25 are installed on the pressing table 21, and a pair of limit rings 26 are installed around the pressing block 24. The limit rods 25 and the limit rings 26 are slidably connected.

[0024] In the process of processing molds for producing electrical insulation components, the grinding assembly 3 needs to carry the cavity block 61 on the sealing grinding block 6 into the mold cavity 41 precisely, and continuously provide stable and controllable downward pressure during the grinding operation, so that the outer wall of the cavity block 61 and the inner wall of the mold cavity 41 always maintain a uniform grinding gap.

[0025] This solution includes a pressing component 2, which includes a pressing table 21. The pressing table 21 is mounted on the machining fixed machine tool 1, providing a fixed installation reference for the entire pressing drive system.

[0026] When the servo motor 22 is started, its output drives the reciprocating screw 23 to rotate. The helical pair between the reciprocating screw 23 and the screw sleeve converts the rotational motion into the linear reciprocating motion of the screw sleeve along the axis of the reciprocating screw 23. The screw sleeve then drives the pressing block 24 to make precise vertical displacement. The pressing block 24 then transmits the displacement to the drive circulation block 5, thereby driving the entire grinding assembly 3 to make controllable feeding and retraction relative to the mold 4.

[0027] Because the servo motor 22 can perform closed-loop precision control of speed, angle and torque, and with the fixed pitch transmission ratio between the reciprocating screw 23 and the screw sleeve, the feed amount and downward pressure of each step of the pressing block 24 can be precisely set and adjusted in real time. This ensures that the cavity block 61 in the sealing grinding block 6 maintains the preset grinding gap throughout the entire process of extending into the mold cavity 41. In addition, the sealing grinding block 6 is equipped with a sealing gasket, which also forms a sealed space when it comes into contact with the mold 4, avoiding the deviation of grinding amount in each section due to insufficient feed accuracy.

[0028] Meanwhile, a pair of limiting rods 25 are installed on the pressing platform 21, and a pair of limiting rings 26 are installed around the pressing block 24. The limiting rods 25 and the limiting rings 26 are slidably connected. The pair of limiting rods 25 are symmetrically arranged on both sides of the pressing block 24. During the process of the pressing block 24 moving up and down with the screw sleeve, the pair of limiting rings 26 always slides in a straight line along the corresponding limiting rods 25. The two limiting rods 25 together form a double-sided rigid guiding constraint on the pressing block 24.

[0029] The core function of this guiding constraint mechanism is that, on the one hand, the sliding fit between the limiting rod 25 and the limiting ring 26 provides the pressing block 24 with an additional linear guide independent of the reciprocating screw 23 screw pair, effectively eliminating the radial movement and circumferential deflection around the screw axis that may occur when the screw sleeve is subjected to lateral force, so that the movement trajectory of the pressing block 24 is strictly constrained in the vertical straight direction.

[0030] On the other hand, when the polishing fluid circulates at high speed in the polishing gap and applies irregular lateral impact force to the cavity block 61, the impact force is transmitted upward to the pressing block 24 through the sealing polishing block 6 and the driving circulation block 5. A pair of limiting rods 25 can simultaneously bear and disperse these lateral loads from both sides, preventing the pressing block 24 and the polishing assembly 3 below it from shifting or swinging laterally. This ensures that the cavity block 61 always remains coaxially centered in the mold cavity 41, and that the polishing gap remains highly consistent in both the circumferential and axial directions.

[0031] Through the precision feed drive composed of the aforementioned servo motor 22, reciprocating lead screw 23, screw sleeve and pressing block 24, and the double-sided anti-deviation guide constraint composed of a pair of limit rods 25 and a pair of limit rings 26, the pressing component 2 can achieve precise and controllable vertical feed of the grinding component 3, while effectively suppressing the sway and vibration caused by fluid impact during the grinding operation. This provides a reliable mechanical guarantee for the uniformity and stability of the grinding gap between the cavity block 61 and the mold cavity 41, so that the subsequent segmented differentiated grinding process can be carried out under consistent and controllable gap conditions, ultimately improving the grinding accuracy and surface quality of the inner wall of the mold cavity 41.

[0032] like Figure 5 As shown, both ends of the storage box 52 are connected to integrated tubes 51, and each pair of integrated tubes 51 is connected to the drive circulation block 5.

[0033] The storage box 52 is equipped with an upper grinding chamber, a lower grinding chamber, and a cleaning chamber. Electric valves are installed in the upper grinding chamber, the lower grinding chamber, and the cleaning chamber. The upper grinding chamber contains upper grinding fluid, the lower grinding chamber contains lower grinding fluid, and the cleaning chamber contains cleaning fluid.

[0034] like Figure 6 As shown, the upper polishing fluid contains upper polishing magnetic particles, and the lower polishing fluid contains lower polishing magnetic particles. The particle size of the upper polishing magnetic particles is larger than that of the lower polishing magnetic particles. The upper polishing magnetic particles are irregularly angular particles, while the lower polishing magnetic particles are spherical particles.

[0035] The drive circulation block 5 has a first drive chamber and a second drive chamber. The first drive chamber and the second drive chamber are respectively installed in the first drive chamber and the second drive chamber. The integrated tube 51 is provided with a first hose connected to the first drive chamber and a second hose connected to the second drive chamber. The first hose and the second hose are respectively connected to the upper grinding chamber and the lower grinding chamber, and both the first hose and the second hose are connected to the cleaning chamber.

[0036] like Figures 7 to 11 As shown, an annular seal 64 is installed at the outer end of the cavity block 61. The annular seal 64 divides the grinding gap into an upper grinding gap and a lower grinding gap. A grinding channel 63 is provided on the cavity block 61. Multiple upper grinding channels and multiple lower grinding channels are provided in the grinding channel 63. The upper grinding channels are all connected to the upper grinding gap and the first hose. The lower grinding channels are all connected to the lower grinding gap and the second hose. The grinding direction of the upper grinding fluid and the lower grinding fluid is to flow in through the grinding fluid inlet 65 and then flow out through the grinding fluid outlet 66. Multiple evenly distributed magnetic coils are embedded in the area of ​​the cavity block 61 corresponding to the upper grinding gap. The leads of the magnetic coils are led out to the outside of the cavity block 61 and connected to an external adjustable power supply.

[0037] In particular, since the mold processed in this solution is mainly used to form the insulating shed 71 of the composite insulator of high-voltage transmission line, and the structural characteristics of the insulating shed 71 itself determine that its corresponding mold cavity 41 has a large depth dimension, conventional mechanical grinding heads or tools are limited by accessibility and rigidity, making it difficult to penetrate into the entire depth range of the mold cavity 41 to carry out effective and uniform grinding, and the bottom of the deep cavity often becomes a grinding blind zone.

[0038] At the same time, the molding die for the insulating umbrella skirt 71 faces a unique contradiction in surface roughness control that does not exist in thermoplastic molds.

[0039] Insulating umbrella skirts 71 are typically made of thermosetting insulating materials such as silicone rubber, epoxy resin, or BMC / SMC, which are cross-linked and cured in the mold at high temperature. During the curing process, these materials form a chemical adhesion with the cavity surface dominated by covalent bonds and hydrogen bonds, rather than the physical adhesion maintained by van der Waals forces after the thermoplastic plastic cools down. Furthermore, thermosetting materials do not undergo significant volume shrinkage and springback after curing, and the product cannot automatically detach from the cavity wall by cooling shrinkage like thermoplastic products.

[0040] When the surface roughness of the cavity is too low, such as Ra < 0.05 μm, which is close to a mirror state, an extremely tight surface-to-surface fit is formed between the product and the cavity at the microscale. The wall lacks micro-air gap channels formed by micro-protrusions and valleys, and the external atmospheric pressure cannot penetrate into the bonding interface to balance the internal and external pressure difference. As a result, a significant vacuum adsorption effect is generated between the product and the cavity, causing the demolding force to increase instead of decrease and rise sharply. In severe cases, it can lead to tearing of the product surface or damage to the inner wall of the cavity.

[0041] Therefore, for molds used to form thermosetting insulating materials, the inner wall of the cavity must maintain a moderate micro-rough texture to disrupt the vacuum bonding state.

[0042] However, the roughness cannot be increased indefinitely. The insulating skirt 71 has been in long-term service on high-voltage transmission lines, and its surface micro-morphology directly affects the surface discharge characteristics. Under the action of a high electric field, the surface micro-protrusions generate a field strength concentration effect, and the local electric field strength can be several times or even tens of times the average value, which greatly reduces the surface flashover voltage. If the roughness is too high, such as Ra>0.4μm, it will lead to insufficient electrical safety margin of the insulating component.

[0043] The superposition of the above-mentioned mechanical constraints for demolding and physical constraints for surface discharge determines that the surface roughness of the inner wall of the mold cavity 41 must be precisely controlled within an optimal window range that balances demolding reliability and electrical safety, preferably Ra 0.10~0.25μm.

[0044] Within this window range, the micro-protrusions on the wall can both create sufficient micro-air gap channels between the product and the cavity to break the vacuum adsorption effect and ensure smooth demolding, and prevent the excessive height of the protrusions from causing significant electric field concentration on the surface of the insulating umbrella skirt 71, thus endangering its electrical performance.

[0045] Furthermore, the environmental loads borne by different areas of the insulating umbrella skirt 71 under actual service conditions are fundamentally different: the upper surface 72 of the insulating umbrella skirt 71, i.e. the rain-facing surface, is directly subjected to rainwater impact and atmospheric pollution deposition. Appropriate micro-roughness can enhance the hydrophobicity of the lotus leaf-like effect, causing water droplets to roll off with the dirt particles, thus achieving passive self-cleaning; the lower surface 73 of the insulating umbrella skirt 71, i.e. the rain-shielding surface, is shielded by the upper umbrella skirt, and rainwater is not easily washed directly to it, but it is easy for dirt to accumulate continuously in a dry state. A smoother surface is required to reduce the adhesion and embedding of dirt particles.

[0046] This means that the inner wall of the mold cavity 41 needs to exhibit a gradient surface morphology distribution from moderate roughness near the upper limit of the window to highly smoothness near the lower limit of the window within the above-mentioned optimal window range. However, existing grinding equipment and processes cannot solve the fundamental problem of insufficient accessibility of deep cavities, nor can they achieve the above-mentioned gradient control of surface roughness along the depth direction in a single process.

[0047] To this end, the present invention sets up an independent supply and circulation drive system for the polishing medium, which consists of a storage box 52, an integrated tube 51, a drive circulation block 5, and the internal flow channels and magnetic coils of the cavity block 61. This system replaces conventional mechanical contact polishing with fluid carrying magnetic particles into the entire depth range of the mold cavity 41, overcoming the bottleneck of deep cavity accessibility. Furthermore, it achieves gradient customization of surface morphology through zoned liquid supply and controllable adjustment of the magnetic field.

[0048] Both ends of the storage tank 52 are connected to integrated pipes 51. Each pair of integrated pipes 51 is connected to the drive circulation block 5, forming a bidirectional flow path from the storage tank 52 through the integrated pipes 51 to the drive circulation block 5 and back to the storage tank 52. The storage tank 52 is provided with three independent liquid storage areas: an upper grinding chamber, a lower grinding chamber, and a cleaning chamber. Electric valves are installed in the upper grinding chamber, the lower grinding chamber, and the cleaning chamber to independently control the flow of liquid in each chamber.

[0049] The upper polishing chamber contains upper polishing fluid, the lower polishing chamber contains lower polishing fluid, the cleaning chamber contains cleaning fluid, the upper polishing fluid contains upper polishing magnetic particles, and the lower polishing fluid contains lower polishing magnetic particles.

[0050] The grinding magnetic particles are composite magnetic abrasives of sintered silicon carbide and carbonyl iron powder. The matrix is ​​carbonyl iron powder to provide ferromagnetic response, and the surface is inlaid with silicon carbide microcrystals to provide micro-cutting edges. The particles are irregularly angular in shape, with a particle size preferably of 80-150 μm, a Vickers hardness preferably of HV800-1200, and a saturation magnetization preferably of 1.2-1.8T.

[0051] The selection logic for the above parameters is as follows: the lower limit of the particle size range of 80μm ensures that the depth of the micro-cutting groove formed when the edge tip contacts the wall surface is not less than Ra 0.10μm, so as to obtain sufficient micro-rough texture to destroy the vacuum bonding state between the cavity and the thermosetting product and ensure the reliability of demolding; the upper limit of the particle size range of 150μm, combined with the upper limit of the magnetic field strength, ensures that the depth of the micro-cutting groove formed under the maximum normal clamping force does not exceed Ra 0.25μm, avoids the micro-protrusions transferred to the rain-facing surface of the insulating umbrella skirt 71 from causing excessive field strength concentration effect under high electric field, and ensures the surface flashover voltage margin.

[0052] The Vickers hardness range ensures that the silicon carbide cutting edge has sufficient micro-cutting capability against the hardened steel inner wall of the die cavity 41 without the particles themselves being crushed and dulled.

[0053] The saturation magnetization range ensures that the particles have sufficient magnetic response strength in the magnetic field generated by the magnetic coil, so that they can be effectively oriented along the direction of the magnetic field lines and pressed against the wall to form a rigid abrasive cluster.

[0054] The magnetic particles used for grinding are carbonyl iron powder matrix spherical abrasives. The particle surface is polished to a highly spherical state, the particle size is preferably 10-30μm, and the saturation magnetization intensity is preferably 1.0-1.6T.

[0055] Small-diameter spherical particles do not have the micro-cutting ability of sharp edges. Under the action of a magnetic field, they only act on the inner wall of the lower section of the mold cavity 41 by rolling and micro-polishing, and process the wall surface roughness to a high smoothness level of Ra 0.08~0.12μm. This allows the back rain surface and root transition area of ​​the molded insulating umbrella skirt 71 to obtain a surface quality that reduces dirt embedding and micro-crack initiation points near the lower limit of the optimal window.

[0056] Encapsulating the two abrasive media with distinct functions in separate, isolated chambers within the storage tank 52, and controlling their on / off states independently via electric valves within each chamber, provides the material basis for subsequent zoned liquid supply and prevention of cross-contamination of the abrasive media.

[0057] The drive circulation block 5 has a first drive chamber and a second drive chamber. The first drive chamber and the second drive chamber are respectively installed in the first drive chamber and the second drive chamber. The integrated tube 51 is provided with a first hose connected to the first drive chamber and a second hose connected to the second drive chamber. The first hose and the second hose are respectively connected to the upper grinding chamber and the lower grinding chamber, and both the first hose and the second hose are connected to the cleaning chamber.

[0058] The reason why the drive circulation block 5 has two isolated drive chambers with independent drive pumps instead of using a single pump body to drive them is that the upper and lower polishing fluids each have independent power sources and completely isolated flow pipelines. This allows the two polishing fluids, which carry magnetic particles of different sizes and shapes, to always flow in their own closed loops throughout the entire circulation path without crossing each other, thus preventing cross-contamination problems such as large-diameter angular particles being mixed into the fine polishing loop or small-diameter spherical particles being mixed into the coarse polishing loop.

[0059] In addition, the two independently driven pumps can adjust the flow rate and pressure according to the different grinding process requirements of the upper and lower grinding gaps, so that the grinding fluid circulation speed of the upper coarse grinding area and the lower fine polishing area can be optimized independently, rather than being constrained by the uniform output parameters of the same pump body.

[0060] An annular seal 64 is installed at the outer end of the cavity block 61. When the cavity block 61 is driven into the mold cavity 41 by the pressing component 2, the annular seal 64 fits tightly against the inner wall of the mold cavity 41, physically separating the grinding gap between the outer wall of the cavity block 61 and the inner wall of the mold cavity 41 into an upper grinding gap and a lower grinding gap.

[0061] The sealing and separating function of the annular seal 64 is a key prerequisite for achieving differentiated grinding in different zones. Only by establishing a reliable fluid sealing barrier between the upper grinding gap and the lower grinding gap can it be ensured that the upper grinding fluid carrying large-diameter irregular angular particles circulates only within the upper grinding gap and acts on the inner wall of the upper section of the mold cavity 41, while the lower grinding fluid carrying small-diameter spherical particles circulates only within the lower grinding gap and acts on the inner wall of the lower section of the mold cavity 41. The two grinding media each perform their respective functions and do not cross the boundaries of each other.

[0062] The cavity block 61 has a grinding channel 63, and the grinding channel 63 has multiple upper grinding channels and multiple lower grinding channels. The upper grinding channels are all connected to the upper grinding gap and the first flexible tube, and the lower grinding channels are all connected to the lower grinding gap and the second flexible tube.

[0063] Multiple upper grinding channels are evenly distributed around the cavity block 61 and open into the upper grinding gap, so that the upper grinding liquid can be evenly released along multiple channels to the upper grinding gap after entering the cavity block 61 from the first drive pump through the first hose, ensuring that the upper grinding magnetic particles form a uniform circumferential covering grinding effect on the inner wall of the upper section of the mold cavity 41.

[0064] Similarly, multiple lower polishing channels evenly distribute the lower polishing fluid to the lower polishing gaps, achieving uniform and fine polishing of the inner wall of the lower section of the mold cavity 41. After the polishing fluid completes the polishing action on the inner wall of the mold cavity in its respective gap, it flows into the corresponding hose in the integrated pipe 51 through the corresponding polishing channel on the other side, and flows back to the corresponding chamber in the storage box 52, forming a complete independent closed loop.

[0065] Multiple evenly distributed magnetic coils are embedded in the area of ​​the cavity block 61 corresponding to the grinding gap. The leads of the magnetic coils are led out to the outside of the cavity block 61 and connected to an external adjustable power supply.

[0066] When an external adjustable power supply supplies current to the magnetic coil, the magnetic coil generates a radially distributed magnetic field in the upper grinding gap area. Under the action of this magnetic field, the upper grinding magnetic particles in the upper grinding fluid are oriented along the direction of the magnetic field lines and gather towards the inner wall of the upper section of the mold cavity 41. The sharp edges press against the wall surface to form a magnetic abrasive cluster with a certain rigidity, thereby performing micro-cutting of the wall surface with controllable strength.

[0067] By adjusting the output current of the external adjustable power supply, the magnetic field strength can be changed, thereby precisely controlling the normal clamping force and tangential grinding force of the grinding magnetic particles on the inner wall of the upper section of the mold cavity 41, so that the surface roughness formed after grinding is precisely locked within the optimal window range of Ra 0.10~0.25μm.

[0068] Within this window range, the inner wall of the mold cavity has sufficient microscopic air gap channels to break down the vacuum adsorption effect during the demolding of thermosetting materials and ensure demolding reliability. At the same time, the height of the microscopic protrusions is controlled within a safe range that does not cause significant field strength concentration effects, ensuring the surface flashover voltage margin of the insulating components under high voltage operating conditions.

[0069] Most importantly, the magnetic field generated by the magnetic coil naturally decays along the axial direction. The magnetic field strength is greatest on the wall surface near the dense area of ​​the magnetic coil. The polished magnetic particles are pressed against the wall surface by the strongest magnetic force at this point. The micro-cutting depth is greatest at the edge tip. The micro-roughness formed after polishing is close to the upper limit of the optimal window Ra 0.25μm. As the axial distance increases, the magnetic field gradually weakens to near the annular seal 64, and the pressure of the magnetic particles on the wall surface decreases accordingly. The micro-cutting depth gradually decreases, and the wall surface roughness smoothly transitions to near the lower limit of the optimal window. This smoothly connects with the smooth horizontal surface after the spherical particles in the lower grinding gap are polished. This gradient transition is achieved naturally by relying entirely on the physical attenuation law of the magnetic field, without the need for additional process parameter segmentation settings. Moreover, the roughness is constrained within the optimal window range throughout the process, achieving a synergistic unity between the reliability of demolding and the electrical safety of the insulating products in service during the mold manufacturing process.

[0070] It should be noted that during the grinding process, when the upper and lower grinding magnetic particles perform micro-cutting and roll polishing on the inner wall of the 41 hardened steel mold cavity, micron and submicron steel debris will inevitably be generated. If these debris are not removed after entering the circulation loop with the grinding fluid, they will re-enter the grinding gap as uncontrollable impurity particles, causing random scratches on the wall surface and destroying the precisely controlled roughness gradient.

[0071] To this end, a graded filtration assembly is installed in the return pipe section of the integrated pipe 51. The filtration pore size in the return section connected to the first hose is smaller than the lower limit of the particle size of the upper grinding magnetic particles but larger than the typical size of steel debris. Similarly, the filtration pore size in the return section connected to the second hose is smaller than the lower limit of the particle size of the lower grinding magnetic particles. This utilizes the inherent particle size difference between abrasive particles and debris to achieve the separation function of selectively retaining debris and releasing abrasive particles, ensuring the cleanliness of the circulating grinding fluid. This technology is existing technology and will not be described in detail here.

[0072] Meanwhile, since the inner wall of the mold cavity 41 is made of ferromagnetic steel, the steel debris produced by grinding is also ferromagnetic. Under the action of the magnetic field of the magnetic coil, there is a risk that it will be attracted and gathered on the wall and mixed with magnetic abrasive particles. However, the grinding fluid is always continuously circulating under the action of the driving pump. Before the debris is effectively gathered by the magnetic field, it is carried away by the flowing liquid and flushed out of the grinding gap into the return pipeline and intercepted by the filter component, thus avoiding secondary pollution caused by the accumulation of debris in the magnetic field.

[0073] Furthermore, the ferromagnetic properties of the hardened steel wall of the mold cavity 41 are actually beneficial to the implementation of the magnetic abrasive finishing process during the grinding stage. The steel wall acts as a high-permeability magnetic circuit, which makes the magnetic lines of force form a high-gradient magnetic field at the grinding gap, enhancing the pressing force of the magnetic particles on the wall and the grinding effect. However, after grinding, the inner wall of the mold cavity may remain magnetized. If it is not eliminated, the residual magnetism will adsorb ferromagnetic particulate contaminants in the environment during subsequent injection molding service, thereby endangering the quality of the insulating products.

[0074] Therefore, after the cleaning fluid circulation rinsing is completed and the Hall sensor confirms that the residual magnetic particles have dropped below the safe level, the control system inputs an alternating current with a decreasing amplitude to the magnetic coil, so that the inner wall of the mold cavity 41 experiences an alternating magnetic field with repeated polarity reversals and gradual decay, and finally reduces the residual magnetization intensity of the wall surface to near zero, completing the complete closed-loop process from grinding to mold state restoration.

[0075] The design of both the first and second hoses being connected to the cleaning chamber allows the cleaning fluid to be introduced into two independent circuits by switching the opening and closing states of the electric valves after the grinding operation is completed. This cleans the upper grinding gap, the lower grinding gap, and each section of the pipeline, preventing residual magnetic particles and debris from causing secondary damage to the mold forming surface.

[0076] To ensure the thoroughness and quantifiable verifiability of the cleaning process, a Hall sensor is installed in the return pipe section of the integrated pipe 51, with the detection probe of the Hall sensor facing the inner cavity of the pipe.

[0077] During the rinsing process of the cleaning fluid, if there are still residual magnetic particles in the pipeline or grinding gap, these ferromagnetic particles will cause local magnetic field distortion at the probe when they flow through the detection area of ​​the Hall sensor. Based on this, the Hall sensor outputs a voltage pulse signal related to the number and size of the residual particles. After the signal is collected and analyzed by the external control system, the residual concentration of magnetic particles in the cleaning fluid return can be determined in real time.

[0078] When the Hall sensor output signal is lower than the preset threshold for a continuous preset time period, the control system determines that the residual magnetic particles in the pipeline and grinding gap have been removed to a safe level, issues a cleaning completion command and shuts off the cleaning fluid supply valve and drive pump; conversely, if the signal continues to be higher than the preset threshold, the control system automatically continues the cleaning fluid circulation rinsing until the standard is met.

[0079] This Hall sensor-based online detection mechanism transforms the cleaning process from traditional experience-based timed rinsing to closed-loop control based on real-time quantitative feedback, preventing electrical and mechanical defects caused by residual magnetic particles embedding into the surface of insulating products during subsequent injection molding due to incomplete cleaning.

[0080] It should be noted that the cleaning fluid circulation rinsing stage also relies on the graded filtration components in the return pipe section of integrated pipe 51 to maintain the purity of the cleaning fluid itself. Specifically, when the cleaning fluid flows through the upper or lower grinding gap under the action of the driving pump, it washes away the magnetic particles and steel debris remaining on the inner wall of the mold cavity 41, the surface of the magnetic pole head, and the inner wall of the pipe, and carries them into the return pipe. If these washed-away solid contaminants are directly returned to the cleaning chamber with the cleaning fluid and pumped back into the grinding gap, not only will effective cleaning not be achieved, but the peeled-off particles and debris will also repeatedly impact and scratch the forming surface of the mold cavity 41 during the repeated rinsing process, causing surface damage of the same nature as secondary contamination by grinding debris.

[0081] Therefore, when the cleaning fluid flows back through the staged filtration assembly, the filtration assembly traps residual magnetic particles and debris carried in the cleaning fluid on the upstream side of the filter element, allowing only clean cleaning fluid to flow back through the filter element to the cleaning chamber. This ensures that the cleaning fluid pumped back into the grinding gap in each cycle is always in a high-purity state free from solid particle contamination. This makes the rinsing effect monotonically increase with the number of cycles, rather than becoming saturated due to contamination of the cleaning fluid itself. In turn, it ensures that the signal attenuation trend detected by the Hall sensor truly reflects the actual progress of the gradual removal of residual particles in the grinding gap and pipeline, providing a reliable basis for the accuracy of the closed-loop cleaning control criteria.

[0082] like Figure 8 As shown, the bottom of the sealing grinding block 6 is equipped with multiple positioning rods 62, and the mold 4 is provided with multiple positioning grooves 42 that match the positioning rods 62.

[0083] The sealing and grinding block 6 has multiple positioning rods 62 installed at its bottom end. The mold 4 has multiple positioning grooves 42 that match the positioning rods 62. When the sealing and grinding block 6 moves down vertically and closes with the mold 4, each positioning rod 62 is inserted into the corresponding positioning groove 42. The gap between the outer circumferential surface of the positioning rod 62 and the inner wall of the positioning groove 42 is used to achieve precise positioning of the sealing and grinding block 6 relative to the mold 4 in the horizontal plane, ensuring that the axis of the upper magnetic pole head and the integrated tube 51 carried by the sealing and grinding block 6 is coaxially aligned with the axis of the mold cavity 41 with high precision.

[0084] If there is no reliable positioning constraint between the sealing grinding block 6 and the mold 4, the radial eccentricity of the upper magnetic pole head relative to the mold cavity 41 will be randomly distributed during each mold closing operation. This will result in an asymmetrical state in the grinding gap in the eccentric direction, with one side being narrower and the other side being wider. The magnetic particles on the narrower side will be excessively compressed, thus applying excessive cutting force to the wall surface. The particle chain clusters on the wider side will be loose and unable to maintain effective grinding contact. Ultimately, this will form an uneven amount of material removal and roughness difference in the circumferential direction of the inner wall of the mold cavity 41, destroying the axisymmetric accuracy of the roughness gradient.

[0085] The cooperation between multiple positioning rods 62 and positioning grooves 42 provides multi-point over-constraint positioning, eliminating the translational and rotational degrees of freedom of the sealing grinding block 6 in the horizontal plane, so that the coaxial assembly relationship can be reproduced every time the mold is closed, thereby ensuring the circumferential uniformity of the grinding gap and the batch consistency of grinding quality.

[0086] The method for processing molds for manufacturing electrical insulation components includes the following steps: S1: Installation and positioning: Place the mold 4 on the lower side of the grinding component 3 on the machining fixed machine tool 1, start the servo motor 22, and drive the pressing block 24 through the reciprocating screw 23 to drive the driving circulation block 5 and the sealing grinding block 6 to move down, so that the positioning rod 62 is inserted into the positioning groove 42 to complete the alignment, the cavity block 61 extends into the mold cavity 41, and a grinding gap is formed between the outer wall of the cavity block 61 and the inner wall of the mold cavity 41. The annular seal 64 divides the grinding gap into an upper grinding gap and a lower grinding gap. S2: Upper section rough grinding: Open the electric valve of the upper grinding chamber, start the first drive pump, and pump the upper grinding liquid into the upper grinding gap through the first hose and the upper grinding channel for circulation. At the same time, adjust the output current of the external adjustable power supply to control the magnetic coil to generate a magnetic field of preset intensity, so that the upper grinding magnetic particles gather and stick to the inner wall of the upper section of the mold cavity 41 under the action of the magnetic field. The irregular angular structure and large particle size of the upper grinding magnetic particles are used to rough grind the inner wall of the upper section of the mold cavity 41. S3: Lower section fine grinding: Open the electric valve of the lower grinding chamber, start the second drive pump, and pump the lower grinding fluid through the second hose into the lower grinding gap for circulation. Utilize the spherical structure and small particle size of the lower grinding magnetic particles to perform fine grinding on the inner wall of the lower section of the mold cavity 41. S2 and S3 can be performed simultaneously to achieve segmented differentiated grinding of the inner wall of the mold cavity 41. S4: Circulation cleaning: After polishing is completed, close the electric valves of the upper polishing chamber and the lower polishing chamber, open the electric valve of the cleaning chamber, and pump the cleaning fluid into the upper polishing gap and the lower polishing gap through the first drive pump and the second drive pump respectively, to rinse and remove the polishing magnetic particles and debris remaining on the inner wall of the mold cavity 41. The cleaning fluid carrying the residue flows back to the storage tank 52 through the integrated pipe 51. S5: Demolding inspection: After cleaning, close the electric valve of the cleaning chamber and the first and second drive pumps, start the servo motor 22 to drive in reverse, and drive the pressing block 24 to move upward through the reciprocating screw 23, so that the cavity block 61 exits the mold cavity 41, the positioning rod 62 disengages from the positioning groove 42, remove the mold 4, and inspect the grinding quality of the inner wall of the mold cavity 41. S6: Cyclic processing: If the test result does not meet the preset accuracy requirements, repeat S1 to S5, and adjust the current of the magnetic coil according to the test result to change the magnetic field strength, adjust the grinding pressure of the upper grinding magnetic particles on the inner wall of the upper section of the mold cavity 41 until the grinding accuracy of the inner wall of the mold cavity 41 meets the production requirements of electrical insulation parts, and complete the mold processing.

[0087] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A mold processing equipment for producing electrical insulation components, characterized in that, include: A fixed machining tool (1) is provided, and a storage box (52) is installed at the bottom of the fixed machining tool (1). Pressing assembly (2), which is mounted on the machining fixed machine tool (1); Grinding assembly (3), the grinding assembly (3) is set on the machining fixed machine tool (1), the grinding assembly (3) includes a drive circulation block (5) and a sealing grinding block (6), the drive circulation block (5) is installed on the upper side of the sealing grinding block (6), and a cavity block (61) is installed at the bottom end of the sealing grinding block (6). Mold (4), the mold (4) is disposed on the lower side of the grinding assembly (3), and the mold (4) has a mold cavity (41). The cavity block (61) matches the mold cavity (41) and extends into the mold cavity (41). A grinding gap is formed between the outer wall of the cavity block (61) and the inner wall of the mold cavity (41). It works in conjunction with the drive circulation block (5) and the storage box (52) to perform segmented and differentiated grinding on the inner wall of the mold cavity (41).

2. The mold processing equipment for producing electrical insulation components as described in claim 1, characterized in that, The pressing assembly (2) includes a pressing table (21), which is mounted on a machining fixed machine tool (1). A servo motor (22) is mounted on the pressing table (21), and a reciprocating lead screw (23) is mounted at the output end of the servo motor (22). A screw sleeve is mounted around the reciprocating lead screw (23), and a pressing block (24) is mounted around the screw sleeve. The pressing block (24) is connected to the drive circulation block (5).

3. The mold processing equipment for producing electrical insulation components as described in claim 2, characterized in that, A pair of limiting rods (25) are installed on the pressing table (21), and a pair of limiting rings (26) are installed around the pressing block (24). The limiting rods (25) and the limiting rings (26) are slidably connected.

4. The mold processing equipment for producing electrical insulation components as described in claim 1, characterized in that, Both ends of the storage box (52) are connected to integrated tubes (51), and each pair of integrated tubes (51) is connected to the drive circulation block (5).

5. The mold processing equipment for producing electrical insulation components as described in claim 4, characterized in that, The storage box (52) is provided with an upper grinding chamber, a lower grinding chamber and a cleaning chamber. Electric valves are installed in the upper grinding chamber, the lower grinding chamber and the cleaning chamber. The upper grinding chamber is provided with upper grinding fluid, the lower grinding chamber is provided with lower grinding fluid and the cleaning chamber is provided with cleaning fluid.

6. The mold processing equipment for producing electrical insulation components as described in claim 5, characterized in that, The upper polishing fluid contains upper polishing magnetic particles, and the lower polishing fluid contains lower polishing magnetic particles. The particle size of the upper polishing magnetic particles is larger than that of the lower polishing magnetic particles. The upper polishing magnetic particles are irregularly angular particles, and the lower polishing magnetic particles are spherical particles.

7. The mold processing equipment for producing electrical insulation components as described in claim 5, characterized in that, The drive circulation block (5) has a first drive cavity and a second drive cavity. The first drive cavity and the second drive cavity are respectively equipped with a first drive pump and a second drive pump. The integrated tube (51) is provided with a first hose connected to the first drive cavity and a second hose connected to the second drive cavity. The first hose and the second hose are respectively connected to the upper grinding cavity and the lower grinding cavity, and both the first hose and the second hose are connected to the cleaning cavity.

8. The mold processing equipment for producing electrical insulation components as described in claim 7, characterized in that, An annular seal (64) is installed on the outer end of the cavity block (61). The annular seal (64) divides the grinding gap into an upper grinding gap and a lower grinding gap. A grinding channel (63) is provided on the cavity block (61). Multiple upper grinding channels and multiple lower grinding channels are provided in the grinding channel (63). The upper grinding channels are all connected to the upper grinding gap and the first flexible tube. The lower grinding channels are all connected to the lower grinding gap and the second flexible tube. Multiple uniformly distributed magnetic coils are embedded in the area of ​​the cavity block (61) corresponding to the upper grinding gap. The leads of the magnetic coils are led out to the outside of the cavity block (61) and connected to an external adjustable power supply.

9. The mold processing equipment for producing electrical insulation components as described in claim 1, characterized in that, The bottom end of the sealing grinding block (6) is equipped with multiple positioning rods (62), and the mold (4) is provided with multiple positioning grooves (42) that match the positioning rods (62).

10. A method for processing a mold for manufacturing electrical insulation components, characterized in that, The method for processing molds for producing electrical insulation components, as described in any one of claims 1 to 9, comprises the following steps: S1: Installation and positioning: Place the mold (4) on the lower side of the grinding assembly (3) on the machining fixed machine tool (1), start the servo motor (22), drive the pressing block (24) through the reciprocating screw (23) to drive the driving circulation block (5) and the sealing grinding block (6) to move down, so that the positioning rod (62) is inserted into the positioning groove (42) to complete the alignment, the cavity block (61) extends into the mold cavity (41), and a grinding gap is formed between the outer wall of the cavity block (61) and the inner wall of the mold cavity (41). The annular seal (64) divides the grinding gap into an upper grinding gap and a lower grinding gap. S2: Upper section rough grinding: Open the electric valve of the upper grinding chamber, start the first drive pump, and pump the upper grinding liquid into the upper grinding gap through the first hose and the upper grinding flow channel for circulation. At the same time, adjust the output current of the external adjustable power supply to control the magnetic coil to generate a magnetic field of preset intensity, so that the upper grinding magnetic particles gather and stick to the inner wall of the upper section of the mold cavity (41) under the action of the magnetic field. Use the irregular angular structure and large particle size of the upper grinding magnetic particles to perform rough grinding on the inner wall of the upper section of the mold cavity (41). S3: Lower section fine grinding: Open the electric valve of the lower grinding chamber, start the second drive pump, and pump the lower grinding liquid through the second hose into the lower grinding gap for circulation. Utilize the spherical structure and small particle size of the lower grinding magnetic particles to perform fine grinding on the inner wall of the lower section of the mold cavity (41). S2 and S3 can be performed simultaneously to achieve segmented differentiated grinding of the inner wall of the mold cavity (41). S4: Circulation cleaning: After polishing is completed, close the electric valves of the upper polishing chamber and the lower polishing chamber, open the electric valve of the cleaning chamber, and pump the cleaning liquid into the upper polishing gap and the lower polishing gap through the first drive pump and the second drive pump respectively, to rinse and remove the polishing magnetic particles and debris remaining on the inner wall of the mold cavity (41). The cleaning liquid carries the residue back to the storage tank (52) through the integrated pipe (51). S5: Demolding test: After cleaning, close the electric valve of the cleaning chamber and the first and second drive pumps, start the servo motor (22) to drive in reverse, and drive the pressing block (24) to move upward through the reciprocating screw (23), so that the cavity block (61) exits the mold cavity (41), the positioning rod (62) disengages from the positioning groove (42), remove the mold (4), and test the grinding quality of the inner wall of the mold cavity (41); S6: Cyclic processing: If the test results do not meet the preset accuracy requirements, repeat steps S1 to S5, and adjust the current of the magnetic coil according to the test results to change the magnetic field strength, adjust the grinding pressure of the upper grinding magnetic particles on the inner wall of the upper section of the mold cavity (41) until the grinding accuracy of the inner wall of the mold cavity (41) meets the production requirements of electrical insulation parts, and complete the mold processing.

Images