A molding die and molding method for sealing rubber cap

Abstract

The present invention discloses a molding die for a sealing rubber cap, comprising a cover body; the cover body is provided with a cavity groove for buckling the cover on the periphery of a part to be sealed after filling the sealant and a through hole connected to the cavity groove; a positioning part for cooperating with the part to be sealed covered by the cavity groove after being inserted into the through hole to position the cover body and the part to be sealed; the positioning part is removed from the through hole after positioning, and the cover body is separated from the sealing rubber cap and removed after the sealing rubber cap is molded. The mold uses the positioning part to position and install the cover body, so that the cavity groove and the sealant therein are arranged at a preset position relative to the part to be sealed, ensuring that the sealing rubber cap molded by the sealant has a preset thickness to meet the use requirements; after the sealing rubber cap is molded, the cover body and the positioning part are separated from the sealing rubber cap and the part to be sealed to prevent the product from falling off automatically when used. The present invention also provides a molding method for a sealing rubber cap using the molding die of the above-mentioned sealing rubber cap, which can accurately form a sealing rubber cap with high quality, good sealing performance and safety outside the part to be sealed.

Description

Technical Field

[0001] The present invention relates to the field of fastener sealing, and in particular to a molding die for a sealing rubber cap. The present invention also relates to a molding method using the molding die for the sealing rubber cap. Background Art

[0002] With the development of modern aviation technology, a large number of new fasteners such as high-locking bolts and nuts are widely used in aircraft manufacturing. In order to improve the sealing performance of fasteners and at the same time play a lightning protection effect, it is necessary to use qualified aviation sealants to seal during the installation of fasteners to seal humidity and provide critical corrosion protection.

[0003] The sealing of aircraft fasteners is mostly done manually, which is a time-consuming and labor-intensive process. Due to the difficulty of manual operation and the variability in the use of sealants among technicians, it is easy to cause holes or excessive use of sealants during use. Therefore, sealing caps are used.

[0004] However, the existing sealing cap is prone to position deviation when covered on the fastener, resulting in uneven thickness of the adhesive layer around the fastener, which not only affects the sealing effect, but also, especially when the thickness of the local adhesive layer is too thin to reach the preset value, the sealing cap and the adhesive layer inside it cannot meet the performance requirements of lightning protection and are easily punctured, posing a serious safety hazard. Summary of the invention

[0005] The object of the present invention is to provide a sealing rubber cap forming die, which can accurately form a sealing rubber cap with a qualified thickness on the periphery of a sealed component, ensure the strength and sealing performance of the sealing rubber cap, and at the same time avoid the generation of bubbles in the sealing rubber cap, thereby improving the quality of the sealing rubber cap. Another object of the present invention is to provide a sealing rubber cap forming method using the above-mentioned sealing rubber cap forming die.

[0006] To achieve the above object, the present invention provides a molding die for a sealing rubber cap, comprising:

[0007] The cover body is provided with a cavity groove for buckling the cover on the periphery of the sealed member after filling the sealant, and the cover body is also provided with a through hole communicating with the cavity groove;

[0008] The positioning portion is used to cooperate with the part to be sealed covered by the cavity after being inserted into the through hole to position the cover body and the part to be sealed; the positioning portion is removed from the through hole after the cover body and the part to be sealed are positioned, and the cover body is separated from the sealing rubber cap and removed after the sealant is cured to form a cover buckled on the sealing rubber cap of the part to be sealed.

[0009] Preferably, the positioning portion includes a plurality of sub-positioning portions distributed circumferentially along the opening direction of the cavity; the sub-positioning portions surround and clamp the component to be sealed to achieve circumferential positioning of the cover body and the component to be sealed.

[0010] Preferably, the through hole is arranged on the opposite side of the mouth of the cavity.

[0011] Preferably, at least one of the sub-positioning portions has a bending structure surrounding and abutting against the component to be sealed in the circumferential direction of the cavity opening.

[0012] Preferably, the through hole includes a plurality of sub-through holes corresponding one-to-one to the sub-positioning portions for insertion therein.

[0013] Preferably, the insertion directions of all the sub-through holes are perpendicular or inclined to the opening direction of the cavity.

[0014] Preferably, the through hole is arranged on the opposite side of the mouth of the cavity, and the positioning portion penetrating the through hole is inserted into the positioning groove of the component to be sealed facing the through hole to achieve positioning of the cover body and the component to be sealed.

[0015] Preferably, the positioning portion comprises a blocking section for blocking the through hole when inserted into the through hole.

[0016] Preferably, the positioning portion is connected to a cover portion for facilitating an operator to pull the positioning portion.

[0017] Preferably, the cover portion and the cover body are integrally formed.

[0018] Preferably, a handle is further provided on the outer side of the cover body.

[0019] Preferably, the handle is arc-shaped and both ends are connected to the cover body, so as to operate the handle to deform the cover body after the sealant is cured.

[0020] Preferably, the outer surface of the cover body is provided with scale lines for calibrating the injection amount of the sealant.

[0021] The present invention also provides a method for forming a sealing rubber cap, using the above-mentioned molding die for the sealing rubber cap, comprising:

[0022] S1: injecting sealant into the cavity of the cover;

[0023] S2: buckle the cover body filled with sealant to cover the outer periphery of the sealed component, and insert the positioning part of the through hole of the cover body into cooperation with the sealed component to realize the positioning of the cover body and the sealed component;

[0024] S3: removing the positioning portion, and removing the air and excess sealant in the cavity from the through hole;

[0025] S4: After the sealant is cured to form a sealant cap, the cover body is separated from the sealant cap and removed.

[0026] Preferably, the step S1 specifically includes:

[0027] S11: inserting the positioning portion into the through hole of the cover body to block the through hole;

[0028] S12: The mouth of the glue gun is pressed against the bottom surface of the cavity of the cover body to start injecting the sealant, and as the amount of the sealant injected increases, the mouth of the glue gun is moved along the inner wall of the cavity toward the mouth of the cavity;

[0029] S13: When the sealant plane in the cavity is flush with the scale line on the outer surface of the cavity, the injection of the sealant is stopped.

[0030] Preferably, the step S2 specifically includes:

[0031] S21: Covering the cover body filled with sealant from top to bottom on the periphery of the component to be sealed;

[0032] S22: The cover body is rotated downward to make the positioning portion and the component to be sealed reach a matching state, thereby achieving the positioning of the cover body and the component to be sealed.

[0033] Preferably, the step S22 further includes:

[0034] The cover body is continuously spun to allow the sealant to form a continuous annular sealant ring at the outer edge of the mouth of the cavity.

[0035] Preferably, the step S4 specifically includes:

[0036] After the sealant is cured to form a sealant cap, the handle disposed on the cover body is operated to deform the cover body and rotate the cover body to remove the cover body.

[0037] Compared with the above background technology, the molding die of the sealing rubber cap provided by the present invention comprises a cover body and a positioning portion.

[0038] A cavity and a through hole are arranged in the cover body. The cavity is used to fill the sealant and after the sealant is filled, the cover is buckled on the periphery of the component to be sealed; the through hole is connected with the cavity.

[0039] The positioning portion is used to be inserted into the through hole and cooperate with the sealed component covered by the cavity to achieve the positioning of the cover body and the sealed component, thereby ensuring that each part of the sealing rubber cap cured and formed in the gap between the cavity and the sealed component has a preset thickness.

[0040] When using the molding mold of the sealing cap, since the sealant is sticky, the sealant can be filled in the cavity before the positioning part is inserted into the through hole, or the sealant can be filled after the positioning part is inserted into the through hole; the cover body filled with sealant is buckled on the outer periphery of the part to be sealed, so that the positioning part inserted into the through hole cooperates with the part to be sealed, thereby realizing the positioning of the cover body and the part to be sealed; after the positioning is completed, the positioning part is removed from the through hole, so that the through hole remains connected with the outside world, and the excess air and sealant in the cavity are discharged from the through hole to avoid the formation of holes after the sealant is cured; while waiting for the sealant to cure into a sealing cap, the cover body is separated from the sealing cap and removed.

[0041] The molding die of the above-mentioned sealing rubber cap accurately positions the cover body and the part to be sealed through the positioning part, so that the inner wall of the cavity in the cover body and the part to be sealed have a preset distance, and the sealing rubber cap formed by solidifying in the gap between the cavity and the part to be sealed also has a preset thickness, and there will be no local thin wall thickness phenomenon, thereby ensuring the quality and sealing effect of the sealing rubber cap; after the positioning part is removed from the through hole, the excess air and sealant in the cavity can be discharged through the through hole, which, on the one hand, avoids the formation of holes in the molded sealing rubber cap due to the inclusion of air, and on the other hand, facilitates the discharge of excess sealant, thereby ensuring the amount of glue used in the sealing rubber cap.

[0042] In addition, since the cover body and the positioning part are both parts of the mold, after the sealing cap is formed and sealed to the periphery of the part to be sealed, the cover body and the positioning part do not need to be retained outside the sealing cap, and both can be removed relative to the sealing cap and the part to be sealed, thereby avoiding the risk of accidental detachment of the cover body and the positioning part during subsequent use of the product.

[0043] The molding method of the sealing rubber cap provided by the present invention uses the above-mentioned molding mold. When using this method to seal the part to be sealed, only the molded sealing rubber cap is retained on the periphery of the part to be sealed, thereby improving safety. In addition, the molded sealing rubber cap can meet the wall thickness requirements and has high quality and good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0045] Figure 1 This is a schematic structural diagram of a molding die for a first sealing rubber cap provided by the present invention;

[0046] Figure 2 for Figure 1 A schematic diagram of the structure in which the middle positioning part and the through hole are in a separated state;

[0047] Figure 3 for Figure 1 The structural schematic diagram of the molding die of the sealing rubber cap shown is in a positioning state;

[0048] Figure 4 A schematic structural diagram of a molding die for a second sealing rubber cap provided by the present invention;

[0049] Figure 5 This is a schematic structural diagram of a molding die for a third sealing rubber cap provided by the present invention;

[0050] Figure 6 This is a schematic structural diagram of a molding die for a fourth sealing rubber cap provided by the present invention;

[0051] Figure 7 This is a schematic structural diagram of a fifth type of molding die for a sealing rubber cap provided by the present invention;

[0052] Figure 8 This is a schematic structural diagram of a molding die for a sixth sealing rubber cap provided by the present invention;

[0053] Fig. 9 It is a schematic diagram of assembling the sub-positioning portion with a bending structure and the component to be sealed in the molding die of the fifth and sixth sealing rubber caps provided by the present invention;

[0054] Fig.10 This is a schematic structural diagram of a seventh type of molding die for a sealing rubber cap provided by the present invention;

[0055] Fig.11 This is a schematic diagram of assembling a sub-positioning portion with a bending structure and a component to be sealed in a molding die of a seventh sealing rubber cap provided by the present invention;

[0056] Fig.12 A schematic flow chart of a method for forming a sealing rubber cap provided by an embodiment of the present invention;

[0057] Among them, 01-part to be sealed, 11-through hole, 12-cavity groove, 2-positioning part, 21-sealing section, 22-base, 3-handle, 4-cover. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0060] Please refer to Figures 1 to 12 , Figure 1 This is a schematic structural diagram of a molding die for a first sealing rubber cap provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure in which the middle positioning part and the through hole are in a separated state; Figure 3 for Figure 1 The structural schematic diagram of the molding die of the sealing rubber cap shown is in a positioning state; Figure 4 A schematic structural diagram of a molding die for a second sealing rubber cap provided by the present invention; Figure 5 This is a schematic structural diagram of a molding die for a third sealing rubber cap provided by the present invention; Figure 6 This is a schematic structural diagram of a molding die for a fourth sealing rubber cap provided by the present invention; Figure 7 This is a schematic structural diagram of a fifth type of molding die for a sealing rubber cap provided by the present invention; Figure 8 This is a schematic structural diagram of a molding die for a sixth sealing rubber cap provided by the present invention; Fig. 9 It is a schematic diagram of assembling the sub-positioning portion with a bending structure and the component to be sealed in the molding die of the fifth and sixth sealing rubber caps provided by the present invention; Fig.10 This is a schematic structural diagram of a seventh type of molding die for a sealing rubber cap provided by the present invention; Fig.11 This is a schematic diagram of assembling a sub-positioning portion with a bending structure and a component to be sealed in a molding die of a seventh sealing rubber cap provided by the present invention; Fig.12 A schematic flow chart of a method for forming a sealing rubber cap provided in an embodiment of the present invention.

[0061] The present invention provides a molding die for a sealing rubber cap, comprising a cover body and a positioning portion 2.

[0062] The cover body is provided with a cavity 12 for filling sealant and a through hole 11 connected to the cavity 12. After the sealant is filled in the cavity 12, the cover is buckled on the outer periphery of the sealed component 01, and the sealant is squeezed between the cavity 12 and the gap between the sealed component 01.

[0063] The positioning portion 2 is used to extend into the cavity 12 along the through hole 11 and cooperate with the sealed component 01 covered by the cavity 12. The relative position of the positioning portion 2 and the sealed component 01 is used to ensure the relative position of the cover body and the sealed component 01, thereby achieving the positioning of the cover body and the sealed component 01.

[0064] It should be noted that, depending on the specific setting form of the positioning portion 2 and the different assembly relationship between the positioning portion 2 and the through hole 11, the positioning portion 2 can be inserted into the through hole 11 before the cavity 12 is filled with sealant. When the cavity 12 covers the part to be sealed 01, the positioning portion 2 moves with the cavity 12 toward the part to be sealed 01 and cooperates with the part to be sealed 01. It can also be inserted into the through hole 11 after the cavity 12 filled with sealant covers the part to be sealed 01.

[0065] In summary, compared with the existing sealing caps, the molding mold of the sealing rubber cap provided by the present invention accurately positions the cover body and the part to be sealed 01 through the positioning part 2 and the through hole 11, thereby ensuring that the wall thickness of the sealing rubber cap after molding meets the requirements; the through hole 11 is used for the positioning part 2 to be installed and positioned, and secondly, it is used to discharge the air and excess sealant in the cavity 12 to ensure the amount of sealant used in the sealing rubber cap; after completing the sealing of the part to be sealed 01, the cover body and the positioning part 2 serving as the mold are separated from the sealing rubber cap and removed, and only the sealing rubber cap is retained on the periphery of the part to be sealed 01, thereby eliminating the risk of the cover body and the positioning part 2 falling off when the product containing the part to be sealed 01 is used.

[0066] The forming mold of the sealing rubber cap provided by the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0067] According to different matching modes between the positioning portion 2 and the component to be sealed 01 , the present invention provides the following specific embodiments of the molding die for the sealing rubber cap.

[0068] Please refer to Figure 1 , Figure 2 and Figure 3 In the first specific embodiment, the positioning portion 2 and the through hole 11 are both set as one, and the through hole 11 is set on the opposite side of the mouth of the cavity 12, and the end of the positioning portion 2 inserted into the through hole 11 is inserted into the positioning groove of the sealed component 01 to achieve the positioning of the cover body and the sealed component 01.

[0069] In this embodiment, a positioning groove is provided on the top of the component 01 to be sealed, that is, on the side facing the through hole 11. After a positioning portion 2 is inserted into the cavity groove 12 along a through hole 11, the end of the positioning portion 2 cooperates with the positioning groove to ensure that the end of the positioning portion 2 can be inserted into the positioning groove, and the end of the positioning portion 2 inserted into the positioning groove can limit the displacement of the component 01 to be sealed relative to the positioning portion 2, thereby realizing the positioning of the positioning portion 2 and the component 01 to be sealed. Since the middle part of the positioning portion 2 passes through the through hole 11, the positioning of the cover body and the component 01 to be sealed is also realized.

[0070] For the convenience of operation, the positioning part 2 further includes a blocking section 21 for blocking the through hole 11 when inserted into the through hole 11. The positioning part 2 provided with the blocking section 21 can block the through hole 11 after being inserted into the through hole 11, thereby sealing the cavity 12 from the end of the cover body provided with the through hole 11, ensuring that the sealant filled in the cavity 12 can be retained in the cavity 12 for a long time without leakage.

[0071] Among them, the blocking section 21 can be specifically set as a shaft with a cross-sectional size not less than the size of the through hole 11, and sealing is achieved through the interference fit of the shaft hole; for example, when the through hole 11 is a circular hole, the blocking section 21 is a cylinder; the blocking section 21 can also be set as a first annular step surface set downward, which is used to cooperate with a second annular step surface set upward in the through hole 11, so as to achieve sealing.

[0072] When the sealing section 21 is used to seal the through hole 11 by means of shaft-hole matching, in order to facilitate the insertion of the positioning part 2 into the through hole 11, the radial dimension of the positioning part 2 gradually expands from the head end of the positioning part 2 to the end of the positioning part 2. That is to say, when the positioning part 2 begins to be inserted into the through hole 11, the radial dimension of the positioning part 2 is smaller than the dimension of the through hole 11 and can smoothly enter the through hole 11; when the sealing section 21 in the middle of the positioning part 2 begins to enter the through hole 11, the radial dimension of the sealing section 21 gradually expands to be larger than the radial dimension of the through hole 11, and the sealing section 21 is stuck in the through hole 11 and cannot move or rotate. At this time, the positioning part 2 and the through hole 11 complete the sealing assembly.

[0073] After the positioning portion 2 is inserted into the through hole 11 and the through hole 11 is sealed with the sealing section 21, sealant can be filled into the cavity grooves 12 of multiple cover bodies at one time. After the multiple cover bodies are filled with sealant, all the cover bodies are buckled one by one on the periphery of the multiple parts 01 to be sealed, thereby realizing batch operation in a single step and improving work efficiency.

[0074] For the convenience of operation, the positioning part 2 is connected to the cover part 4 , and the operator can drive the positioning part 2 to move by pulling the cover part 4 , so as to conveniently insert the positioning part 2 into the through hole 11 , pull the positioning part 2 out of the through hole 11 , or move the positioning part 2 in the through hole 11 .

[0075] The positioning part 2 can also be rotatably connected to the cover part 4 . Of course, the rotation axis should coincide with the central axis of the positioning part 2 to avoid interfering with the operator's operation of the positioning part 2 .

[0076] Considering the small size of the cover body, the cover 4 and the positioning part 2, in order to facilitate operation and avoid the loss of any of the aforementioned parts, the cover body and the cover 4 can be integrally formed. Of course, in this embodiment, the cover body and the cover 4 should be made of elastic material, so that the cover 4 has sufficient deformation when rotating around the cover body, so that the positioning part 2 can be inserted into and pulled out of the through hole 11 when the cover 4 rotates around the cover body.

[0077] The positioning part 2 can be specifically configured as a strip structure such as a positioning pin. The shape and size of the cover 4 are not specifically limited. Compared with the strip shape of the positioning part 2, it can be configured as a block, a plate, or other shapes, as long as the cover 4 protrudes radially relative to the positioning part 2, so that the operator can pinch the cover 4 to move the cover 4 and the positioning part 2.

[0078] Preferably, the extension direction of the cover 4 can intersect with the extension direction of the positioning portion 2. For example, the cover 4 is set to be plate-shaped, and the positioning portion 2 is perpendicular to one side end surface of the cover 4. When the positioning portion 2 is inserted along the through hole 11, the end of the cover 4 connected to the positioning portion 2 is laid on the hole end of the through hole 11 facing outward. When the positioning portion 2 extends into the through hole 11, the cover 4 is straightly distributed compared to the side of the cover body with the through hole 11, which is conducive to placing multiple covers filled with sealants aside at an angle with the cover 4 facing downward, which is convenient for batch operation.

[0079] A handle 3 may be further provided on the outer side of the cover body to facilitate the operator to hold the cover body.

[0080] The functions of the handle 3 are specifically embodied in the following aspects: 1. When filling the cavity 12 with sealant, the cover body can be held by the handle 3 to facilitate the injection of sealant. Especially when the cover body is made of elastic material, it can prevent the operator's fingers from directly squeezing the cover body and deforming the cover body, thereby affecting the control of the amount of sealant injected; 2. When inserting the positioning part 2 into the through hole 11, the cover body is fixed relative to the operator by the handle 3, which facilitates the rapid insertion of the positioning part 2 into the through hole 11; 3. When separating and removing the cover body from the periphery of the formed sealant cap, it is convenient to drive the cover body to move by the handle 3.

[0081] The handle 3 can be further set to an arc shape, and both ends are connected to the cover body; when the sealant is cured to form a sealing cap on the periphery of the sealed component 01, the handle 3 is operated to pull the cover body until the cover body is deformed relative to the sealing cap, and the contact surface between the cover body and the sealing cap that were originally tightly fitted is partially separated, and air enters from the separation point between the cover body and the sealing cap and diffuses inward, making it convenient to quickly separate the cover body and the sealing cap.

[0082] Exemplarily, when the handle 3 is set to one, opposite forces can be applied to both ends of the handle 3 so that torque can be applied to the cover body through the handle 3, so that the contact surface between the part of the cover body connected to the handle 3 and the sealing rubber cap is used as a shear plane, so that the cover body surface and the sealing rubber cap surface are relatively displaced, or the handle 3 is pulled toward the side away from the cover body, so that the handle 3 drives the cover body to expand and deform outward until the cover body and the sealing rubber cap are partially separated; when the handle 3 is set to two or more, torque can also be applied to the cover body through different handles 3 at the same time.

[0083] In order to conveniently control the injection amount of the sealant in the cavity 12, a scale line can be set on the outer surface of the cover body. When the plane of the sealant filled in the cavity 12 is flush with the scale line, the sealant in the cavity 12 reaches the preset injection amount. Usually, the sealant in the cavity 12 that reaches the preset injection amount can form a sealant cap with a qualified wall thickness, and the excess sealant left is minimized, thereby reducing the workload of subsequent removal of the excess sealant and reducing costs.

[0084] Due to the difference in the model of the sealed component 01 and the difference in the wall thickness of the required sealing rubber cap, the capacities marked by the scale lines of the same model of cover body are different.

[0085] In the second specific embodiment, please refer to Figure 2 , Figure 3 , Figure 7 and Fig.10 The positioning portion 2 includes two or more sub-positioning portions; the through hole 11 includes a plurality of sub-through holes whose number is equal to the sub-positioning portions, and all the sub-through holes are located on the opposite side of the mouth of the cavity 12.

[0086] In this embodiment, at least one of all the sub-positioning parts has a bending structure in the circumferential direction of the opening direction of the cavity 12. After the sub-positioning part is inserted into the cavity 12 along the sub-through hole, its bending structure surrounds and abuts against the part to be sealed 01, thereby achieving the positioning of the part to be sealed 01. In other words, at least one sub-positioning part surrounds the part to be sealed 01 inserted into the cavity 12 with a curved surface or a folded surface. In this way, the number of sub-positioning parts can be set to two, so that at least one sub-positioning part is bent toward the part to be sealed 01 in the cavity 12, thereby abutting against the part to be sealed 01, and all sub-positioning parts play a role in positioning the part to be sealed 01 together.

[0087] According to the difference in the specific bending structure of the sub-positioning portion in the second specific embodiment, it is derived that Figure 7 and Fig.10 Two specific implementation schemes.

[0088] against Figure 7 In a specific embodiment, at least one sub-positioning portion is configured as a curved surface, and accordingly, the sub-through hole corresponding to the sub-positioning portion is configured as an arc shape matching the shape of the sub-positioning portion. Fig. 9 When the sub-positioning portion is fitted to the to-be-sealed component 01 which is a columnar structure and has an arc-shaped side wall, the bending structure of the sub-positioning portion is completely fitted to the arc-shaped side wall of the to-be-sealed component 01 to achieve surface-to-surface contact.

[0089] against Fig.10In a specific embodiment, at least one sub-positioning portion is configured as a folding surface, and the number of bends of the sub-positioning portion and the bending angle between two adjacent surfaces are also set according to the sealed component 01. Accordingly, the sub-through hole corresponding to the sub-positioning portion is configured as a folding line that matches the shape of the sub-positioning portion. For example, if the sub-positioning portion is bent once, that is, the sub-positioning portion has two adjacent and intersecting folding surfaces, reference can be made to Fig.11 When the sub-positioning portion is attached to the to-be-sealed component 01 which is a columnar structure and has an arc-shaped side wall, the bent structure portion of the sub-positioning portion is attached to the arc-shaped side wall of the to-be-sealed component 01, and the contact of the entire sub-positioning portion is discontinuous.

[0090] It should be noted that the above two different implementation schemes are described by taking at least one sub-positioning portion with a bending structure as an example. The contact method between the sub-positioning portion with a bending structure and the sealed component 01 can refer to Fig. 9 and Fig.11 Obviously, it also includes the situation that a plurality or even all of the sub-positioning portions have a bent structure and are in contact with the peripheral side of the sealed component 01, for example Fig. 9 and Fig.11 The two sub-positioning parts both have a bending structure and surround and abut against the sealed component 01. Other related implementation methods can refer to the former and will not be repeated here.

[0091] In summary, according to the specific shape of the bending structure and the specific shape of the side wall of the sealed component 01, there are two specific positioning modes of the sub-positioning portion with the bending structure and the sealed component 01: complete fit and partial fit. Fig. 9 and Fig.11 The matching relationship is described as an example. In addition to these two matching relationships, other implementation methods of using a sub-positioning portion with a bending structure to achieve the positioning of the sealed component 01 all fall within the protection scope of this application.

[0092] The specific arrangement of one or more of the blocking section 21, the cover 4, the handle 3 and the scale lines may refer to the arrangement in the first specific embodiment, and will not be described in detail here.

[0093] In the third specific embodiment, please refer to Figure 4 The positioning portion 2 includes at least three sub-positioning portions; the through hole 11 includes a plurality of sub-through holes, and all of the sub-through holes are located on the opposite side of the mouth of the cavity 12.

[0094] The number of all sub-through holes is not less than the number of all sub-positioning parts, and one sub-through hole can be inserted into just one sub-positioning part. Exemplarily, the number of sub-through holes can be equal to the number of sub-positioning parts, so that all sub-positioning parts can be inserted into all sub-through holes in a one-to-one correspondence.

[0095] Please refer to Figure 2 and Figure 4 ( Figure 4 The middle cover 4, the handle 3, the sealed component 01, and the sealing section 21 are not shown. Figure 2 In the example), since all the sub-through holes are arranged on the opposite side of the mouth of the cavity 12, and the top end of the component 01 to be sealed gradually enters the cavity 12 along the mouth, when all the sub-positioning parts are inserted from the opposite side of the mouth toward the mouth, the extension direction of all the sub-positioning parts is parallel to the extension direction of the component 01 to be sealed, the wall surface of any sub-positioning part is in contact with the outer periphery of the component 01 to be sealed, and all the sub-positioning parts are clamped around the outer periphery of the component 01 to be sealed, so as to realize the circumferential positioning of the component 01 to be sealed.

[0096] In this embodiment, any sub-positioning part is provided with a blocking section 21, so as to block all the sub-through holes one by one, so as to ensure that the bottom end of the inner wall of the cavity 12 is sealed to prevent leakage of sealant; and to achieve a fixed connection between any sub-positioning part and the cover body, so that all the sub-positioning parts move synchronously when the cover body is moved.

[0097] The specific configuration of the blocking section 21 can refer to the configuration in the first specific embodiment, and will not be described in detail here.

[0098] In this embodiment, one or more of the cover 4, the handle 3 and the scale lines may be further provided, and the specific arrangement may also refer to the arrangement in the first specific embodiment.

[0099] Please refer to Figure 5 The fourth specific embodiment provided by the present invention is similar to the third specific embodiment. The similarities are that the positioning portion 2 includes at least three sub-positioning portions and the through hole 11 includes multiple sub-through holes, and one sub-through hole is only for inserting one sub-positioning portion; the difference is that all the sub-through holes are arranged on the wall surface of the cover body in the circumferential direction of the opening direction of the cavity 12. In other words, the insertion direction of any sub-through hole is perpendicular or inclined to the opening direction of the cavity 12.

[0100] Please refer to Figure 2 and Figure 5 ( Figure 5 The middle cover 4, the handle 3, the sealed component 01, and the sealing section 21 are not shown. Figure 2 In the example above, when the insertion direction of all sub-through holes is perpendicular or inclined to the opening direction of the cavity 12, the end face of the sub-positioning portion inserted into the cavity 12 along the sub-through hole contacts the peripheral side of the component 01 to be sealed, and the end face of all sub-positioning portions surrounds and clamps the component 01 to be sealed as the center, thereby realizing the circumferential positioning of the cover body and the component 01 to be sealed.

[0101] The circumferential direction of the opening direction of the cavity 12 specifically refers to the circumferential direction of the extension direction of the cavity 12 in the cover body; more specifically, in order to enable the cover body provided with the cavity 12 to be buckled on the periphery of the sealed component 01, the cavity 12 is not a closed cavity provided in the cover body, but is open toward one side of the cover body, thereby forming a semi-closed cavity with an opening, and the cavity 12 extends from the opening to the inside of the cover body. Figure 5 For example, the cavity 12 faces Figure 5 The circumferential direction of the opening direction of the cavity 12 is Figure 5 The circumferential direction in the up and down directions.

[0102] In this embodiment, the specific arrangement of the blocking section 21 of any sub-positioning portion, the specific arrangement of the cover portion 4 connected to all sub-positioning portions, and the specific arrangement of the scale lines can all be expanded with reference to the second specific embodiment.

[0103] As for the specific setting method of the handle 3, considering that the insertion direction of all the sub-positioning parts in this embodiment is perpendicular or inclined to the opening direction of the cavity 12, in order to avoid interference, the handle 3 and all the sub-through holes can be spaced apart up and down, or spaced apart along the direction surrounding the wall of the cover body.

[0104] This embodiment can use the same material or inner wall structure as the previous specific embodiment, so as to quickly and completely remove the cover body from the periphery of the cured sealing rubber cap.

[0105] In the fifth specific embodiment, please refer to Figure 6 The positioning portion 2 includes at least three sub-positioning portions; one through hole 11 is provided and is located on the opposite side of the mouth of the cavity 12, and all the sub-positioning portions are inserted into one through hole 11.

[0106] Please refer to Figure 2 and Figure 6 ( Figure 6 The middle cover 4, the handle 3, the sealed component 01, and the sealing section 21 are not shown. Figure 2 In the example), when all the sub-positioning parts are inserted into the cavity 12 along the aforementioned through hole 11 and cooperate with the part to be sealed 01, the extension direction of all the sub-positioning parts is parallel to the extension direction of the part to be sealed 01, the wall surface of any sub-positioning part is in contact with the outer periphery of the part to be sealed 01, and all the sub-positioning parts surround and clamp the part to be sealed 01, thereby realizing the circumferential positioning of the cover body and the part to be sealed 01.

[0107] In this embodiment, the cross-sectional dimension of the through hole 11 must be significantly larger than the sum of the cross-sectional areas of all sub-positioning portions, so that a gap is reserved in the centers of all sub-positioning portions inserted into the same through hole 11 for the top end of the sealing member 01 to extend into.

[0108] In order to prevent the sealant filled in the cavity 12 from leaking from the through hole 11, all the sub-positioning parts can be inserted into the through hole 11 before filling the sealant, thereby reducing the actual size of the through hole 11. Combined with the characteristics of the sealant itself, the sealant can be prevented from leaking. Further, all the sub-positioning parts can be fixed as a whole, and a base 22 is provided in the middle of all the sub-positioning parts. On the one hand, the base 22 fixes all the sub-positioning parts as a whole in the form of a ring, and on the other hand, it is used to be inserted into the same through hole 11 with all the sub-positioning parts, thereby blocking the gap between all the sub-positioning parts and the through hole 11, making it convenient to inject glue into the cavity 12.

[0109] The base 22 can be regarded as the blocking section 21 of all the sub-positioning parts, so as to achieve a sealed connection between all the sub-positioning parts and the through hole 11 .

[0110] On this basis, all the sub-positioning parts and / or the base 22 are connected to the cover 4. That is to say, since all the sub-positioning parts are fixedly connected to the base 22, the cover 4 can be fixed to all the sub-positioning parts, or the base 22 can be fixed to the cover 4, or the base 22 and all the sub-positioning parts can be fixed to the cover 4 at the same time, so that the operator can realize the synchronous movement of all the sub-positioning parts by pulling the cover 4, so as to quickly and accurately insert and pull out all the sub-positioning parts into and out of the through hole 11.

[0111] This embodiment can further include one or more of the cover 4, the handle 3, and the scale lines. It should be noted that, no matter the positioning part 2, the sub-positioning part or the base 22, the aforementioned structures will be removed from the through hole 11 after positioning, and the sealant has not yet solidified.

[0112] In the sixth specific embodiment, please refer to Figure 2 , Figure 3 and Figure 8 The positioning portion 2 includes two or more sub-positioning portions, any sub-positioning portion has a bending structure along the circumferential direction of the opening direction of the cavity 12, and all the sub-positioning portions are bent toward the to-be-sealed component 01 in the cavity 12, so that any sub-positioning portion is attached to the circumferential side of the to-be-sealed component 01, and together play a positioning role; one through hole 11 is provided and is located on the opposite side of the mouth of the cavity 12, and all the sub-positioning portions are inserted into one through hole 11.

[0113] This specific embodiment can be understood in combination with the second specific embodiment and the fifth specific embodiment. Any sub-positioning portion is set as a curved surface and a folded surface, so even if only two sub-positioning portions are set, the positioning of the to-be-sealed component 01 in the cavity 12 can still be achieved and the positioning effect can be ensured; and only one through hole 11 is set, which can simplify the structure of the cover body.

[0114] For the convenience of operation, the fifth specific embodiment can also be referred to, in which all the sub-positioning parts in the embodiment are fixed to the cover 4, and the cover 4 is used to realize one-time operation of all the sub-positioning parts. At the same time, the cover 4 can also seal or partially seal the through hole 11 to prevent the sealant in the cavity 12 from leaking.

[0115] Similarly, the specific arrangement of one or more of the blocking section 21, the cover 4, the handle 3 and the scale lines can refer to the arrangement in the first specific embodiment, and will not be described in detail here.

[0116] The present invention also provides a method for forming a sealing rubber cap, using the molding die of the sealing rubber cap provided by any of the above embodiments, please refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig.10 ,include:

[0117] S1: injecting sealant into the cavity 12 of the cover body;

[0118] S2: The cover body filled with sealant is buckled and covered on the outer periphery of the to-be-sealed component 01, and the positioning portion 2 inserted into the through hole 11 cooperates with the to-be-sealed component 01 to achieve positioning of the cover body and the to-be-sealed component 01;

[0119] S3: removing the positioning portion 2 and removing the air and excess sealant in the cavity 12 from the through hole 11;

[0120] S4: After the sealant is cured to form a sealant cap, the cover body is separated from the sealant cap and removed.

[0121] When forming a sealing cap around the sealed component 01 using the above method, firstly, glue is injected into the cavity 12 of the cover body to ensure that the sealant injected into the cavity 12 is not less than the preset injection amount, so as to avoid the problem of insufficient wall thickness or incomplete sealing cap after molding due to too little sealant; then the cover body injected with sealant is buckled on the periphery of the component 01 to be sealed. During this process, the positioning part 2 inserted into the through hole 11 of the cover body cooperates with the component 01 to ensure that the cover body buckled on the periphery of the component 01 to be sealed is accurately positioned with the component 01 to be sealed; after the positioning is completed, the positioning part 2 is removed from the through hole 11, and the air and excess sealant in the cavity 12 are discharged through the through hole 11 to avoid air accumulation in the sealant, forming cavities in the sealing cap after the sealant is cured, which affects the sealing effect and service life of the sealing cap, while ensuring that the amount of sealant in the cavity 12 is not excessive, which affects the quality of the sealing cap.

[0122] It should be noted that, in the step of buckling the cover body onto the outer periphery of the component to be sealed 01, the specific form of the positioning portion 2 cooperating with the component to be sealed 01 in the aforementioned step may also be different depending on the specific arrangement of the positioning portion 2.

[0123] Exemplarily, when the positioning portion 2 can block the through hole 11, the positioning portion 2 is preferentially inserted into the through hole 11 before the injection of glue, thereby blocking the cavity 12 from the side of the cover body provided with the through hole 11, and avoiding the problem of leakage of the sealant injected into the cavity 12. Since the positioning portion 2 has been inserted into the through hole 11 before the injection of glue and maintains a sealed connection relationship with the through hole 11, the positioning portion 2 moves synchronously with the cover body during the process of buckling the cover body on the part to be sealed 01, and the process of buckling the cover body toward the part to be sealed 01 is equivalent to the process of the positioning portion 2 moving toward the part to be sealed 01. When the positioning portion 2 cooperates with the part to be sealed 01, the positioning and buckling are completed at the same time.

[0124] When the positioning portion 2 can only be inserted along the through hole 11 but cannot block the through hole 11 , the positioning portion 2 can be inserted into the through hole 11 before or after the glue injection.

[0125] The former is similar to the implementation process that the positioning part 2 can block the through hole 11, and will not be described in detail here; for the latter, step S2 actually includes two steps: buckling the cover body and inserting the positioning part 2. In the step of inserting the positioning part 2, the positioning part 2 is inserted into the cavity 12 from the through hole 11 and cooperates with the sealing member covered by the cavity 12, so as to realize the positioning of the cover body and the positioning part 2. In the above steps, the movement of the cover body is relatively separated from the movement of the positioning part 2. Since the sealant has not yet solidified during the positioning process, the position of the cover body relative to the to-be-sealed member 01 can be adjusted through the positioning part 2 and the through hole 11, so as to ensure the accurate positioning of the cover body and the to-be-sealed member 01.

[0126] Wherein, step S1 may further include:

[0127] S11: inserting the positioning portion 2 into the through hole 11 of the cover body to block the through hole 11;

[0128] S12: The glue gun mouth is pressed against the bottom surface of the cavity 12 of the cover body to start injecting the sealant, and as the injection amount of the sealant increases, the glue gun mouth is moved along the inner wall of the cavity 12 toward the mouth of the cavity 12;

[0129] S13: When the sealant plane in the cavity 12 is flush with the scale line on the outer surface of the cavity 12, the injection of the sealant is stopped.

[0130] In this embodiment, the positioning portion 2 can block the through hole 11. Before injecting glue, the positioning portion 2 is first inserted into the through hole 11 and blocks the through hole 11, so that all parts of the cavity 12 except the mouth are closed surfaces; after blocking the through hole 11, sealant is injected into the cavity 12. In this process, in order to improve the quality of glue injection and avoid mixing too much air into the sealant during the glue injection process, the glue gun mouth can be pressed against the bottom surface of the cavity 12 to start glue injection. As the amount of sealant injected increases, the glue gun mouth moves along the inner wall of the cavity 12 toward the mouth of the cavity 12, so that the air in the cavity 12 is smoothly discharged from the inside to the outside; when the glue gun mouth and the plane of the sealant injected into the cavity 12 by the glue gun mouth are flush with the scale line on the outer surface of the cavity 12, the sealant in the cavity 12 reaches the preset value. At this time, the glue gun is closed to complete the glue injection.

[0131] During the glue injection process, the moving speed of the glue gun nozzle can be adjusted according to the specific shape of the cavity 12 to prevent air from accumulating at the diameter change of the cavity 12 and failing to be discharged in time.

[0132] Furthermore, the above step S2 may include:

[0133] S21: Cover the cover body filled with sealant from top to bottom on the outer periphery of the component to be sealed 01;

[0134] S22: The cover body is rotated downward to make the positioning portion 2 and the component to be sealed 01 reach a matching state, thereby achieving the positioning of the cover body and the component to be sealed 01.

[0135] In the previous embodiment, the positioning part 2 has been inserted into the through hole 11 before the glue is injected, so the positioning part 2 moves with the cover body during the process of buckling the cover body. However, according to the different ways in which the positioning part 2 realizes positioning, step S22 has slight differences.

[0136] For example, when the through hole 11 is arranged on the opposite side of the mouth of the cavity 12, the extension direction of the positioning portion 2 is the same as the extension direction of the to-be-sealed component 01, so when the cover is rotated downward, the positioning portion 2 moves downward synchronously with the cover. When the cover completely covers the to-be-sealed component 01, the end of the positioning portion 2 cooperates with the positioning groove, or the entire positioning portion 2 surrounds the circumference of the to-be-sealed component 01.

[0137] When the insertion direction of the through hole 11 is perpendicular or inclined to the opening direction of the cavity 12, the cover body moves downward relative to the sealed part 01, while the positioning portion 2 inserted from the through hole 11 moves horizontally or tilted downward. At this time, the movement of the cover body and the movement of the positioning portion 2 are in different directions and cannot be achieved at the same time. Therefore, in the process of rotating the cover body downward to make the positioning portion 2 match the sealed part 01, it specifically includes two steps: rotating the cover body downward until the cover is completely buckled with the sealed part 01, and pushing the positioning portion 2 toward the sealed part 01 until the end of the positioning portion 2 abuts against the sealed part 01.

[0138] On the basis of the above embodiment, in order to ensure that the cover body completely covers the to-be-sealed component 01, so that the sealant in the cavity 12 is completely and evenly wrapped around the periphery of the to-be-sealed component 01, step S22 further includes:

[0139] The cover body is continuously pressed so that the sealant forms a continuous annular sealant ring at the outer edge of the mouth of the cavity 12 .

[0140] In this embodiment, it is considered that when injecting glue into the cavity 12, the sealant gathers on the bottom surface of the cavity 12 away from the mouth, and in order to make the sealant cap formed after the sealant is fixed to seal the to-be-sealed component 01, the to-be-sealed component 01 needs to completely enter the cavity 12 from the mouth of the cavity 12, in other words, the cavity 12 and the sealant therein need to completely cover the to-be-sealed component 01. Therefore, in this step, the cover body is continuously spun until the sealant in the cover body flows from the bottom of the cavity 12 to the mouth of the cavity 12, and flows spirally toward the mouth, so as to ensure that the circumference of the to-be-sealed component 01 is evenly covered.

[0141] In the above process, being able to form a continuous annular sealing rubber ring on the outer edge of the mouth means that the sealant in the gap between the cavity 12 and the sealed component 01 flows evenly along the entire inner wall of the cavity 12, and the sealant fills the gap between the cavity 12 and the sealed component 01.

[0142] This embodiment uses the above phenomenon as the basis for detection and judgment. If a continuous annular sealing rubber ring can be formed in step S22, it means that the sealing operation is normal and you can proceed to the next step. If a continuous annular sealing rubber ring cannot be formed in step S22, it means that the sealing operation has failed. After removing the positioning part 2 and the cover body, the uncured sealant on the periphery of the sealed part 01 should be cleaned and the operation should be repeated.

[0143] Further, step S4 in any of the above embodiments specifically includes:

[0144] After the sealant is cured to form a sealant cap, the handle 3 provided on the cover body is operated to deform the cover body and rotate to remove the cover body.

[0145] In this embodiment, a handle 3 is connected to the outer wall of the cover. In order to facilitate the removal of the cover body from the sealing rubber cap and the periphery of the sealed component 01, the operator can deform the cover body by operating the handle 3, and use the air entering the cover body after the cover body is deformed to destroy the vacuum environment between the cavity 12 and the sealing cap cover, so as to facilitate the rapid diffusion of air and separate the strength difference from the sealing cap cover.

[0146] The specific arrangement form of the handle 3 and the specific method of operating the handle 3 can refer to the embodiment of the molding die of the sealing rubber cap mentioned above, and will not be described in detail here.

[0147] The above is a detailed introduction to the molding die and molding method of the sealing rubber cap provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A molding die for a sealing rubber cap, characterized in that: include: A cover body; the cover body is provided with a cavity (12) for buckling the cover on the outer periphery of the to-be-sealed component (01) after being filled with sealant, and the cover body is also provided with a through hole (11) communicating with the cavity (12); A positioning portion (2) for inserting into the through hole (11) and cooperating with the to-be-sealed component (01) covered by the cavity (12) to position the cover body and the to-be-sealed component (01); the positioning portion (2) is removed from the through hole (11) after the cover body and the to-be-sealed component (01) are positioned to allow excess air and sealant in the cavity (12) to be discharged; and the cover body is separated from the sealant cap and removed after the sealant is cured to form a sealant cap that is buckled on the to-be-sealed component (01); The positioning portion (2) comprises a plurality of sub-positioning portions distributed circumferentially along the opening direction of the cavity groove (12); the sub-positioning portions surround and clamp the to-be-sealed component (01) to achieve circumferential positioning of the cover body and the to-be-sealed component (01); The through hole (11) is arranged on the opposite side of the mouth of the cavity (12), and the positioning portion (2) that penetrates the through hole (11) is inserted into the positioning groove (011) on the side of the component to be sealed (01) facing the through hole (11) to achieve positioning of the cover body and the component to be sealed (01).

2. The molding die for the sealing rubber cap according to claim 1, characterized in that: At least one of the sub-positioning portions has a bending structure surrounding and abutting against the component to be sealed (01) in the circumferential direction of the opening direction of the cavity (12).

3. The molding die of the sealing rubber cap according to claim 1, characterized in that: The through hole (11) comprises a plurality of sub-through holes corresponding one-to-one to the sub-positioning portions for insertion.

4. The molding die for the sealing rubber cap according to claim 3, characterized in that: The insertion directions of all the sub-through holes are perpendicular or inclined to the opening direction of the cavity (12).

5. The molding die for the sealing rubber cap according to any one of claims 1 to 4, characterized in that: The positioning portion (2) comprises a blocking section (21) for blocking the through hole (11) when inserted into the through hole (11).

6. The molding die for the sealing rubber cap according to any one of claims 1 to 4, characterized in that: The positioning portion (2) is connected to a cover portion (4) for facilitating an operator to pull the positioning portion (2).

7. The molding die for the sealing rubber cap according to claim 6, characterized in that: The cover portion (4) is integrally formed with the cover body.

8. The molding die for the sealing rubber cap according to any one of claims 1 to 4, characterized in that: A handle (3) is also provided on the outer side of the cover body.

9. The molding die for the sealing rubber cap according to claim 8, characterized in that: The handle (3) is arc-shaped and has two ends connected to the cover body, and is used to operate the handle (3) after the sealant is cured to deform the cover body.

10. The molding die for the sealing rubber cap according to any one of claims 1 to 4, characterized in that: The outer surface of the cover body is provided with scale lines for calibrating the injection amount of the sealant.

11. A method for forming a sealing rubber cap, characterized in that: A molding die for a sealing rubber cap according to any one of claims 1 to 10, comprising: S1: injecting sealant into the cavity (12) of the cover body; S2: buckling the cover body filled with sealant onto the outer periphery of the part to be sealed (01), and inserting the positioning portion (2) of the through hole (11) of the cover body into cooperation with the part to be sealed (01) to achieve positioning of the cover body and the part to be sealed (01); S3: removing the positioning portion (2) and removing air and excess sealant from the cavity (12) through the through hole (11); S4: After the sealant is cured to form a sealant cap, the cover body is separated from the sealant cap and removed.

12. The method for forming a sealing rubber cap according to claim 11, characterized in that: The step S1 specifically includes: S11: inserting the positioning portion (2) into the through hole (11) of the cover body to block the through hole (11); S12: the mouth of the glue gun is pressed against the bottom surface of the cavity (12) of the cover body to start injecting the sealant, and as the amount of sealant injected increases, the mouth of the glue gun is moved along the inner wall of the cavity (12) toward the mouth of the cavity (12); S13: Stop injecting the sealant when the sealant plane in the cavity (12) is flush with the scale line on the outer surface of the cavity (12).

13. The method for forming a sealing rubber cap according to claim 12, characterized in that: The step S2 specifically includes: S21: buckling the cover body filled with sealant onto the outer periphery of the component to be sealed (01) from top to bottom; S22: The cover body is rotated downwards to enable the positioning portion (2) and the component to be sealed (01) to reach a matching state, thereby achieving the positioning of the cover body and the component to be sealed (01).

14. The method for forming a sealing rubber cap according to claim 13, characterized in that: The step S22 further includes: The cover body is continuously spun to allow the sealant to form a continuous annular sealant ring at the outer edge of the mouth of the cavity (12).

15. The method for forming a sealing rubber cap according to any one of claims 11 to 14, characterized in that: The step S4 specifically includes: After the sealant is solidified into a sealant cap, a handle (3) provided on the cover body is operated to deform the cover body and rotate the cover body to remove it.

Images