A pole-type sensor injection-molding process

Abstract

The application relates to a kind of pole type sensor injection molding processes, comprising: injection molding resin body; The surface of the resin body needs to be coated with silicone rubber, and a coupling agent is applied; The solid silicone rubber is injected outside the resin body: the resin body is fixed in the silica gel mold, the solid silicone rubber is injected into the cavity of the silica gel mold using an injection molding machine, the solid silicone rubber enters between the resin body and the cavity wall of the silica gel mold from multiple points on one side of the umbrella skirt of the resin body, and exhausts from the other side of the umbrella skirt of the resin body; After the glue is injected, the silicone rubber is preliminarily vulcanized at a certain temperature for a certain time in the silica gel mold to form a silicone rubber injection body, the mold is opened, the silicone rubber injection body is taken out, and it is baked until the silicone rubber is completely vulcanized, and the pole type sensor injection is completed. The injection molding process can use solid silicone rubber, and the molding effect of the entire pole type sensor is better, the service life is longer, and the cost is lower.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pole type sensor injection molding, in particular to a pole type sensor injection molding process. BACKGROUND

[0002] The existing pole type sensor is used for 10kV pole-mounted switch and runs in outdoor environment, and is directly irradiated by sunlight. The injection molding shell of the existing pole type sensor is a combination of epoxy resin and silicone rubber from the inside to the outside. The silicone rubber is located at the outermost layer and is used to resist direct sunlight, prevent cracking and powdering of the epoxy resin caused by long-term exposure to sunlight, and shorten the service life. The injection material of the existing pole type sensor generally uses liquid silicone rubber, which has the problems of high price, low tear strength and easy dust adsorption. If solid silicone rubber is used, the above problems can be avoided, but the injection pressure in the solid silicone rubber injection molding process is larger, and the injection pressure is easy to concentrate, which causes the pressure of the inner shell at a certain position to be too large and causes damage to the epoxy resin. SUMMARY

[0003] The present application provides a pole type sensor injection molding process, which makes the forming effect of the entire pole type sensor better and has a longer service life.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] A pole type sensor injection molding process using a resin mold for injecting epoxy resin and a silicone rubber mold for injecting silicone rubber, comprising:

[0006] Injection resin body: fixing each part of the pole type sensor in the resin mold, filling the inner cavity of the resin mold with epoxy resin using an injection machine, keeping the resin mold at a certain temperature for a certain time to preliminarily cure the epoxy resin to form a resin body blank, opening the mold, baking the resin body blank to completely cure to form a resin body, and cooling to room temperature;

[0007] Applying a coupling agent to the surface of the resin body that needs to be coated with silicone rubber;

[0008] Injecting solid silicone rubber outside the resin body: fixing the resin body in the silicone rubber mold, injecting solid silicone rubber into the inner cavity of the silicone rubber mold using an injection machine, the silicone rubber enters between the resin body and the inner cavity wall of the silicone rubber mold from multiple points on one side of the umbrella skirt of the resin body, and exhausts from the other side of the umbrella skirt of the resin body, after the injection is completed, keeping the silicone rubber mold at a certain temperature for a certain time to preliminarily vulcanize the silicone rubber to form a silicone rubber injection body, opening the mold, taking out the silicone rubber injection body, baking it to completely vulcanize the silicone rubber, and completing the injection of the pole type sensor.

[0009] Preferably, the glass transition temperature value of the epoxy resin is greater than the vulcanization temperature value of the silicone rubber.

[0010] Preferably, after the resin mold cavity is filled with the epoxy resin, the preliminary curing and the thorough curing of the resin body are as follows:

[0011] The resin mold is kept at 115℃ for 40 minutes to 1 hour to preliminarily cure the epoxy resin to form a resin body blank;

[0012] The mold is opened, the resin body blank is taken out, and the resin body is placed in an oven at 90℃ for 12 hours to thoroughly cure the epoxy resin to form the resin body.

[0013] Preferably, after the silicone mold cavity is filled with the silicone rubber, the preliminary vulcanization and the thorough vulcanization of the silicone rubber are as follows:

[0014] The silicone mold is kept at 95℃ for 40 minutes to 1 hour to preliminarily vulcanize the silicone rubber to form a silicone rubber injection body;

[0015] The mold is opened, the silicone rubber injection body is taken out, and the silicone rubber injection body is placed in an oven at 70℃ for 12 hours to thoroughly vulcanize the silicone rubber, and then cooled to room temperature, and the pole type sensor injection is completed.

[0016] Preferably, it further includes the steps of: first preheating the solid silicone rubber to a certain temperature to reduce its viscosity, and then injecting it into the silicone mold.

[0017] Preferably, it further includes the steps of: after the silicone rubber fills the silicone mold cavity, the silicone mold is quickly opened once to release the gas in the mold cavity, and then preliminary vulcanization is performed.

[0018] Preferably, after the resin body is placed in the silicone mold, there is a uniform gap of 3mm between the resin body and the silicone mold cavity.

[0019] Preferably, the silicone mold includes an upper mold, a middle frame, and a lower mold, the upper mold is fixed to the injection end of the injection machine, and the steps of fixing the resin body in the silicone mold include:

[0020] The upper part, the middle part, and the bottom part of the resin body are all sealed and fixed on the middle frame, and the two form an integral body;

[0021] The resin body fixed on the middle frame is placed flat in the clamping position of the lower mold, the upper mold fixed on the injection machine is pressed down and tightly pressed with the lower mold, and the closing of the silicone mold is completed.

[0022] Preferably, the silicone mold includes an upper mold, a middle frame, and a lower mold, the upper mold is fixed to the injection end of the injection machine by screws, the middle frame includes a rectangular outer frame, a middle support cylinder, an upper support cylinder, a bottom support column, and a support block, the bottom support column is of T-shaped structure, the rectangular outer frame is detachable and connected by four support rods through screws, and the steps of fixing the resin body on the middle frame include:

[0023] The middle support cylinder and the upper support cylinder are respectively screwed on the middle extending screw rod and the upper extending screw rod of the resin body, and an O-shaped sealing ring is sleeved between the middle support cylinder and the middle end face of the resin body, and an O-shaped sealing ring is sleeved between the upper support cylinder and the upper side wall of the resin body;

[0024] The bottom support column small end is passed through the support block, the support block is in abutment with the bottom support column large end and connects the two, then the bottom support column large end is put into the mounting hole in the bottom of the resin body, the support block is in abutment with the bottom end face of the resin body, and an O-shaped sealing ring is arranged between the two and sleeved on the outer circumferential side of the bottom support column;

[0025] Then, the four support rods are connected with the middle extending screw rod end face, the upper extending screw rod end face and the bottom support column small end of the resin body through screws, and the four support rods are connected to form a rectangular outer frame.

[0026] Preferably, the upper mold in the silica gel mold is provided with a glue injection port, and the mold closing surface of the upper mold and the lower mold forms a plurality of glue injection channels and exhaust channels, one end of the glue injection channel is in communication with the glue injection port, the other end flows to the resin body umbrella skirt, and the glue injection channel and the exhaust channel are located on the two sides of the resin body umbrella skirt, respectively.

[0027] Compared with the prior art, the application has the following beneficial effects:

[0028] 1. The solid silicone rubber is used as the outermost coating layer of the pole type sensor, which can effectively resist the damage of ultraviolet rays to the internal epoxy resin, thereby ensuring the service life of the epoxy resin shell of the entire pole type sensor.

[0029] 2. The glue injection technology scheme is to inject glue from multiple points at the resin body umbrella skirt, and the glue injection points are uniformly distributed at the resin body umbrella skirt, wherein the resin body umbrella skirt is a circular arc surface, the dispersion surface is large, the glue injection pressure can be effectively dispersed, the resin body is uniformly stressed, and the situation that a part of the resin body is cracked due to concentrated stress is avoided; and the glue injection technology scheme in the embodiment further includes glue injection on one side of the umbrella skirt and air exhaust on the other side of the umbrella skirt, which can effectively exhaust air, so that the forming effect of the entire pole type sensor is better. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the specific embodiments or prior art of the present application, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0031] Figure 1 The injection molding process block diagram of the embodiment in the present application;

[0032] Figure 2 The whole schematic diagram of the silicone mold of the device of the embodiment in the present application is shown in the figure;

[0033] Figure 3 The partial schematic diagram of the silicone mold of the device of the embodiment in the present application is shown in the figure;

[0034] Figure 4 The schematic diagram of the middle frame fixed resin body of the embodiment in the present application is shown in the figure;

[0035] Figure 5 The schematic diagram of the middle frame, resin body and lower mold fixation of the embodiment in the present application is shown in the figure;

[0036] Figure 6 The schematic diagram of the bottom support column and support block connection of the embodiment in the present application is shown in the figure;

[0037] Figure 7 The schematic diagram of the resin body of the embodiment in the present application is shown in the figure.

[0038] Explanation of reference signs:

[0039] 1, upper mold; 11, glue injection port; 2, middle frame; 21, rectangular outer frame; 22, upper support cylinder; 23, middle support cylinder; 24, bottom support column; 25, support block; 3, lower mold; 4, glue inlet channel; 5, exhaust channel; 6, resin body. DETAILED DESCRIPTION

[0040] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should be noted that unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] As shown in Figures 1-7 The present application provides a kind of pole type sensor injection molding process, and it is realized by resin mold, silica gel mold and injection molding machine, wherein the injection molding machine and resin mold cooperate to realize the injection molding of epoxy resin and initially form resin body, then the injection molding machine and silica gel mold cooperate to realize the injection of silicone rubber outer layer outside resin body, so as to realize the injection of pole type sensor, the specific steps are as follows:

[0044] Injection resin body: fix each part of pole type sensor at corresponding position in resin mold, then use injection molding machine to inject epoxy resin into the cavity of resin mold through glue injection port of resin mold, after filling material, inject silicone rubber in resin mold at a certain temperature for a certain time, so that epoxy resin is initially cured to form resin body blank, then open mold, put resin body blank into oven and bake at a certain temperature for a certain time, so that resin body blank is completely cured to form resin body, then take out and cool to room temperature, complete the injection of resin body.Each part includes capacitor voltage divider, current coil, vacuum arc chamber and other parts that pole type sensor should have; Resin mold uses mold for injection of resin body.

[0045] Then apply coupling agent on the surface of resin body that needs to be coated with solid silicone rubber. The coupling agent is silane coupling agent, which can enhance the bonding strength between composite materials and improve the resistance to humidity and other adverse environmental conditions.

[0046] Injection of solid silicone rubber outside resin body: first fix the resin body in the silica gel mold, then inject the solid silicone rubber into the silica gel mold through the injection molding machine, the silicone rubber enters between the resin body and the inner wall of the silica gel mold from multiple points on the umbrella skirt side of the resin body, after the silicone rubber fills the inner cavity of the silica gel mold, keep it at a certain temperature for a certain time in the silica gel mold, so that the silicone rubber is initially vulcanized to form a silicone rubber injection body, then open the mold and take out the silicone rubber injection body, put it into the oven and bake at a certain temperature for a certain time, so that the silicone rubber is completely vulcanized, the silicone rubber injection is completed, and the entire pole type sensor injection is completed.

[0047] During the injection molding process of the aforementioned pole-type sensor, the solid silicone rubber is injected. This embodiment employs a glue injection technique that injects glue from multiple points along the resin shed, with the injection points evenly distributed throughout the shed. The shed is a circular arc with a large dispersion surface, effectively distributing the injection pressure and ensuring uniform stress on the resin body, thereby preventing uneven stress on the resin body, which could lead to cracking in a particular area due to concentrated stress. Furthermore, this embodiment employs a glue injection technique that includes multiple glue injection points located on one side of the shed. This single-sided approach aims to prevent a small amount of air remaining after injection, which could result in material shortages. Glue is injected on one side of the shed, while air is exhausted on the other side, effectively discharging air. Furthermore, the pole-type sensor utilizes silicone rubber as its outermost coating, effectively resisting UV damage to the internal epoxy resin, thereby ensuring the service life of the entire pole-type sensor epoxy resin shell.

[0048] The glass transition temperature of the epoxy resin used above is greater than the vulcanization temperature of the silicone rubber. The vulcanization temperature here refers to the temperature at which the silicone rubber is rapidly vulcanized. In this embodiment, the glass transition temperature of the epoxy resin is greater than that of the rubber by more than 110°C, specifically 115°C, and the vulcanization temperature of the silicone rubber is 90°C. The temperature difference is used to ensure that the vulcanization temperature during the solid silicone rubber injection process will not cause the resin body to vitrify, thereby avoiding damage to the resin body.

[0049] Specifically, after the inner cavity of the resin mold is filled with epoxy resin, the specific steps for the initial curing and thorough curing of the resin body are as follows: maintain the temperature of the resin mold at 115°C for 40 minutes to 1 hour to allow the epoxy resin to be initially cured to form a resin body blank, then open the mold, take out the resin body blank from the resin mold, and bake the resin body blank in an oven at a temperature of 90°C for 12 hours to allow the epoxy resin to be thoroughly cured, and then cool to room temperature to finally form a resin body to ensure the integrity of the shape of the resin body.

[0050] Specifically, the specific steps of silicone rubber injection are as follows: before injecting solid silicone rubber through the injection machine, the solid silicone rubber needs to be preheated to a certain temperature, specifically 40℃-50℃, which can reduce the viscosity of the silicone rubber and make it easier to inject it into the silicone mold. After the silicone rubber fills the silicone mold cavity from the resin body umbrella skirt, the silicone mold maintains a temperature of 95℃ for 40 minutes to 1 hour to allow the silicone rubber to be initially vulcanized to form a silicone rubber injection body, then open the mold, take out the silicone rubber injection body from the silicone mold, and place the silicone rubber injection body in an oven at a temperature of 70℃ and bake it for 12 hours to completely vulcanize the silicone rubber, then cool it to room temperature, and the silicone rubber injection is completed, and the entire pole-type sensor injection is completed.

[0051] Preferably, after the silicone rubber fills the inner cavity of the silicone mold, the silicone mold needs to be quickly opened and closed once, and then initially vulcanized, so that the water vapor generated in the cavity can be discharged before vulcanization to avoid material shortages and bubbles. It can also be closed again to reshape the silicone rubber between the silicone mold and the resin body to avoid material shortages and ensure the integrity of the silicone rubber injection shape outside the resin body.

[0052] Specifically, the heating and heat preservation of the resin mold and the silicone mold can be achieved by electric heating, and the cooling can be achieved by a cold water circulation machine.

[0053] Specifically, in this embodiment, after the resin body is placed in the silicone mold, a uniform gap of 3 mm is formed between the resin body and the inner cavity of the silicone mold, so that the thickness of the formed silicone rubber wall is 3 mm.

[0054] Specifically, the resin mold adopts an existing epoxy resin injection mold, such as Figures 2-7 As shown, the above-mentioned silicone mold includes an upper mold 1, a middle frame 2 and a lower mold 3, wherein the upper mold 1 is fixed to the injection end of the injection molding machine by screws, and the middle frame 2 includes a rectangular outer frame 21, a middle support cylinder 23, an upper support cylinder 22, a bottom support column 24 and a support block 25. The bottom support column 24 is a T-shaped structure. The rectangular outer frame 21 is detachable and is connected by four support rods through screws. The steps of fixing the resin body 6 on the middle frame 2 include:

[0055] The middle support cylinder 23 and the upper support cylinder 22 are respectively threadedly connected to the screw extending from the middle part and the screw extending from the upper part of the resin body 6, and an O-ring is provided between the middle support cylinder 23 and the middle end surface of the resin body 6, and an O-ring is provided between the upper support cylinder 22 and the upper side wall of the resin body 6;

[0056] The small end of the bottom support column 24 is passed through the support block 25, and the support block 25 is abutted against the large end of the bottom support column 24 and the two are connected. Then the large end of the bottom support column 24 is placed into the mounting hole at the bottom of the resin body 6. The support block 25 is abutted against the bottom end surface of the resin body 6, and an O-ring is provided between the two, which is sleeved on the outer circumference of the bottom support column 24;

[0057] Then, four support rods are connected to the screw end face extending from the middle of the resin body 6, the screw end face extending from the upper part of the resin body 6 and the small end of the bottom support column 24 by screws, and the four support rods are connected by screws to form a rectangular outer frame 21.

[0058] In addition, the screw end face extending from the middle of the resin body 6, the screw end face extending from the upper part of the resin body 6, and the small end of the bottom support column 24 are located in the installation groove provided on the side wall of the support block 25, making the installation of the resin body 6 more secure.

[0059] The silicone mold is formed by setting the middle frame 2 outside the upper mold 1 and the lower mold 3, so that the middle frame 2 fixes the resin body 6 to form a whole, so that the resin body 6 has greater supporting force, which is used to resist the glue injection pressure when the silicone rubber is injected, so that the resin body 6 is more stable in the silicone rubber injection; and the O-shaped sealing ring is arranged at the connection between the upper part, the middle part and the lower part of the resin body 6 and the rectangular outer frame 21, so as to avoid the silicone rubber entering the inner cavity of the resin body 6 during the glue injection process.

[0060] Specifically, the upper mold 1 has an upper end face with a glue injection port 11, the upper mold 1 and the lower mold 3 both have corresponding clamping positions, after the upper mold 1 and the lower mold 3 are combined, the upper and lower clamping positions form a glue injection cavity, and the resin body 6 is installed in the glue injection cavity, and the rectangular outer frame 21 is located on the outer peripheral side of the upper mold 1 and the lower mold 3,

[0061] After the upper mold 1 and the lower mold 3 are combined, three through holes are formed around the upper mold 1 and the lower mold 3 for placing the upper supporting cylinder 22, the middle supporting cylinder 23 and the small end of the bottom supporting column 24, and the sizes are matched, so that the resin body 6 can be suspended in the glue injection cavity, and a gap of 3mm is formed between the outer side wall of the resin body 6 and the cavity wall of the glue injection cavity.

[0062] Specifically, the upper mold 1 in the silicone mold is provided with a glue injection port 11, the upper mold 1 has a glue injection channel communicated with the glue injection port 11, and after the upper mold 1 and the lower mold 3 are combined, a plurality of glue injection channels 4 and a plurality of exhaust channels 5 are formed at the combined surface of the upper mold 1 and the lower mold 3, the exhaust channels 5 are communicated with the outside, and specifically, the exhaust channels 5 also have the function of blocking the flow of silicone rubber, which is not described in detail as prior art, one end of the glue injection channel 4 is communicated with the glue injection channel, and the other end flows to the umbrella skirt of the resin body 6, and the glue injection channel 4 and the exhaust channel 5 are respectively located on both sides of the umbrella skirt of the resin body 6.

[0063] In the embodiment, as shown in Figures 4-5 The middle frame 2 can fix two resin bodies 6 at a time, the middle parts of the resin bodies 6 are respectively fixed on the opposite two supporting rods, the upper parts and the lower parts of the resin bodies 6 are respectively installed on the opposite two supporting rods, the four supporting rods form the middle frame 2, and after the corresponding upper mold 1 and the lower mold 3 are combined, two glue injection cavities are formed for placing the two resin bodies 6, the glue injection port 11 and the glue injection channel are located between the two glue injection cavities, the glue injection channels 4 are located in the middle and are divided into two groups, the two groups of glue injection channels 4 correspond to the two glue injection cavities respectively, the silicone rubber enters the two groups of glue injection channels 4 from the glue injection port 11 through the glue injection channel, and flows to both sides and flows into the corresponding glue injection cavities, and the glue injection is completed.

[0064] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application, and any non-essential changes and replacements made by those skilled in the art on the basis of the present application are within the scope of protection of the present application.

Claims

1. A pole-type sensor injection molding process, characterized in that: include: Injection resin body: Fix the various parts of the pole-type sensor in the resin mold, use an injection machine to fill the inner cavity of the resin mold with epoxy resin, maintain a certain temperature in the resin mold for a certain time, so that the epoxy resin is initially solidified to form a resin body blank, open the mold, bake the resin body blank until it is completely solidified to form a resin body, and cool it to room temperature; Apply coupling agent to the surface of the resin body that needs to be coated with silicone rubber; Inject solid silicone rubber outside the resin body: fix the resin body in the silicone mold, use an injection machine to inject solid silicone rubber into the inner cavity of the silicone mold, and the silicone rubber enters between the resin body and the inner cavity wall of the silicone mold from multiple points on one side of the resin body shed, and is exhausted from the other side of the resin body shed. After the glue is injected, it is kept at a certain temperature in the silicone mold for a certain time to make the silicone rubber initially vulcanized to form a silicone rubber injection body. Open the mold, take out the silicone rubber injection body, and bake it until the silicone rubber is completely vulcanized. The injection of the pole type sensor is completed.

2. The injection molding process of the pole type sensor according to claim 1, characterized in that: The glass transition temperature of epoxy resin is greater than the vulcanization temperature of silicone rubber.

3. The injection molding process of the pole type sensor according to claim 2, characterized in that: After the inner cavity of the resin mold is filled with epoxy resin, the initial curing and complete curing steps of the resin body are as follows: Maintaining the resin mold at a temperature of 115° C. for 40 minutes to 1 hour allows the epoxy resin to initially solidify to form a resin body blank; The mold is opened, the resin body blank is taken out, and the resin body is placed in an oven at a temperature of 90°C for 12 hours to completely cure the epoxy resin to form a resin body.

4. The injection molding process for the pole-type sensor according to claim 3, characterized in that: After the inner cavity of the silicone mold is filled with silicone rubber, the initial vulcanization and complete vulcanization steps of the silicone rubber are as follows: The silicone mold is kept at 95°C for 40 minutes to 1 hour to allow the silicone rubber to be initially vulcanized to form a silicone rubber injection molding; Open the mold, take out the silicone rubber injection molding, and bake it in an oven at 70°C for 12 hours to completely vulcanize the silicone rubber. Then cool it to room temperature, and the injection molding of the pole-type sensor is completed.

5. The injection molding process of the pole type sensor according to claim 1, characterized in that: The method also includes the following steps: preheating the solid silicone rubber to a certain temperature, reducing its viscosity, and then injecting the solid silicone rubber into the silicone mold.

6. The injection molding process for the pole-type sensor according to claim 1, characterized in that: The method further includes the following steps: after the silicone rubber fills the inner cavity of the silicone mold, the silicone mold is quickly opened once, and then preliminary vulcanization is performed.

7. The injection molding process for a pole-type sensor according to claim 1, characterized in that: After the resin body is placed in the silicone mold, there is a uniform gap of 3 mm between the resin body and the inner cavity of the silicone mold.

8. The injection molding process for a pole-type sensor according to any one of claims 1 to 7, characterized in that: The silicone mold includes an upper mold, a middle frame, and a lower mold. The upper mold is fixed to the injection end of the injection molding machine. The steps of fixing the resin body in the silicone mold include: First, seal and fix the upper, middle and bottom parts of the resin body to the middle frame to form a whole; Place the resin body fixed on the middle frame flat on the clamping position of the lower mold, press the upper mold fixed on the injection molding machine down and press it tightly against the lower mold to complete the silicone mold closing.

9. The injection molding process for the pole-type sensor according to claim 8, characterized in that: The silicone mold includes an upper mold, a middle frame, and a lower mold. The upper mold is fixed to the injection end of the injection molding machine by screws. The middle frame includes a rectangular outer frame, an upper support cylinder, a middle support cylinder, a bottom support column, and a support block. The bottom support column is a T-shaped structure. The rectangular outer frame is detachable and connected by four support rods with screws. The steps of fixing the resin body to the middle frame include: The middle support tube and the upper support tube are respectively threadedly connected to the screw extending from the middle part of the resin body and the screw extending from the upper part, and an O-type sealing ring is provided between the middle support tube and the middle end surface of the resin body, and an O-type sealing ring is provided between the upper support tube and the upper side wall of the resin body; Pass the small end of the bottom support column through the support block, and the support block abuts against the large end of the bottom support column and connects the two. Then, place the large end of the bottom support column into the mounting hole at the bottom of the resin body. The support block abuts against the bottom end surface of the resin body, and an O-ring is provided between the two, which is sleeved on the outer circumference of the bottom support column. Then, four support rods are connected to the screw end face extending from the middle of the resin body, the screw end face extending from the upper part of the resin body and the small end of the bottom support column by screws, and the four support rods are connected to form a rectangular outer frame.

10. The injection molding process for the pole-type sensor according to claim 8, characterized in that: The upper mold in the silicone mold is provided with a glue injection port, and the mating surfaces of the upper mold and the lower mold form multiple glue inlet channels and exhaust channels. One end of the glue inlet channel is connected to the glue injection port, and the other end flows to the resin body umbrella skirt, and the glue inlet channel and exhaust channel are respectively located on both sides of the resin body umbrella skirt.

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