A kind of manufacturing mold of submarine cable test water terminal sealing ring

Abstract

A kind of seal ring manufacturing mould of sea cable test water terminal, belong to the technical field of submarine cable manufacturing.It is characterized in that, including container base, inner embedded ring, cylinder, stainless steel clamp, container base is composed of half structure along radial direction by first half mould, second half mould, the parting surface of first half mould is provided with recessed structure, the parting surface of second half mould is provided with the protruding structure matched with the recessed structure;Inner embedded ring is arranged in the inside of container base, for limiting the outer diameter size of sealing ring;Cylinder is detachably installed in the center of container base, for limiting the inner hole size of sealing ring;Stainless steel clamp is sleeved on the outer circular surface of container base, for locking first half mould and second half mould closed.The utility model realizes sealing ring quick demoulding, size precision adjustable, significantly improve safety, convenience and mould service life.

Description

Technical Field

[0001] This utility model relates to a mold for manufacturing a sealing ring for a test water terminal of a submarine cable, belonging to the field of submarine cable manufacturing technology. Background Technology

[0002] In the withstand voltage test of marine cables, the test water terminal is a critical component, and its sealing performance directly affects the accuracy and reliability of the test results. O-rings are a commonly used core component to ensure this performance. These rings are made from silicone rubber as the base material. Before curing, silicone rubber exhibits strong fluidity and must be mixed and formulated with a specific ratio of curing agent, and its final shape is defined by a suitable mold.

[0003] Currently, most traditional molds widely used in the industry adopt an integral structure (as shown in Figure 1). However, this integral structure has revealed some demolding-related problems in practical applications: 1. Safety: The integral structure requires a large external force to be applied to the sealing ring during demolding. If the force is not properly controlled, the hand can easily collide with the edge of the mold or the operating table.

[0004] 2. Convenience: When demolding, you need to hold a blade and carefully cut along the gap between the sealing ring and the inner wall of the mold to separate the adhered parts. This process requires a high level of skill to avoid scratching the mold and cutting the sealing ring. You need to repeatedly adjust the cutting angle and force. After cutting, you need to use tools such as pry bars to pry the mold and then slowly remove the sealing ring. The whole process takes at least 10-20 minutes, which is inefficient.

[0005] 3. Cost-effectiveness: After silicone rubber cures, its molecules form chemical bonds with the mold surface, significantly increasing adhesion and thus greatly raising the resistance during demolding. Even with careful force application during demolding, uneven force can easily damage the sealing ring edges and scratch the surface, leading to a lower finished product yield. Furthermore, the contact and friction between the pry bar and the mold's inner wall inevitably leave scratches, compromising the mold's surface smoothness, significantly reducing mold reusability, increasing equipment procurement costs, and consuming production time. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of the existing technology by providing a mold for manufacturing a sealing ring for a submarine cable test water terminal, enabling rapid demolding of the sealing ring, precise and adjustable dimensions, and significantly improving safety, convenience, and mold lifespan.

[0007] The technical solution of this utility model is as follows: A mold for manufacturing a sealing ring for a test underwater cable terminal is provided. The mold is a modular design, and its main structure includes a container base, an inner ring, a cylinder, and a stainless steel clamp. The container base is composed of a first half mold and a second half mold joined radially to form a half-structure. The parting surface of the first half mold has a recessed structure, and the parting surface of the second half mold has a protruding structure that mates with the recessed structure. An embedded ring is disposed inside the container base to limit the outer diameter of the sealing ring. A cylinder is detachably installed at the center of the container base to limit the inner diameter of the sealing ring. A stainless steel clamp is placed on the outer circumferential surface of the container base to lock the first half mold and the second half mold closed.

[0008] In the above scheme, the first half mold and the second half mold are detachable splicing structures, which together form the basic load-bearing frame of the mold. When assembling the entire mold, the concave and convex parting surfaces of the two half molds are spliced ​​together first, then the cylinder is locked with stainless steel clamps and installed, and finally the inner ring is inserted. All components work together to form the combined molding structure of the mold.

[0009] The container base and inner ring are made of aluminum, utilizing aluminum's low density and high machining precision to ensure the overall structural strength and dimensional accuracy of the mold. The cylinder is made of plastic, and its core function is to provide a pre-drilled hole structure for the sealing ring forming process. That is, through its own cylindrical structure, a circular hole matching the diameter of the cylinder is formed during the sealing ring forming process, thereby meeting the sealing ring's requirement for a specific hole diameter.

[0010] The embedded ring is a key component of the container base system. Its main functions include two aspects: first, it plays a precise role in limiting the maximum forming size of the sealing ring, ensuring that the sealing ring will not exceed the preset size range due to excessive material flow during the forming process; second, it provides a stable support structure for the forming of silicone rubber, ensuring that the silicone rubber can maintain the preset shape and size accuracy during the curing process.

[0011] Preferably, the first half-mold and the second half-mold are respectively provided with positioning screw holes at corresponding positions on the parting surface. The first half-mold and the second half-mold are fixed relative to each other by screwing positioning screws into the corresponding positioning screw holes. The positioning screw holes penetrate through the bottom of the two half-molds, and the outer ends of the positioning screw holes are located in the annular groove. After splicing, positioning screws are inserted from the side of the half-mold for fixation to ensure that the two half-molds are firmly connected.

[0012] Preferably, the outer circumferential surface of the container base is provided with an annular groove, and the stainless steel clamp is fitted into the annular groove. The cross-sectional dimensions of the annular groove are adapted to the cross-sectional dimensions of the stainless steel clamp, so that the stainless steel clamp can be completely fitted into the annular groove and form surface contact with the outer circumferential surface of the base. When the stainless steel clamp is tightened along the annular groove, the concave and convex parting surfaces of the two half molds can be driven to fit tightly together by radial constraint force, forming a complete circular closed structure, thereby forming a closed container forming cavity.

[0013] Preferably, the first half-mold and the second half-mold are provided with demolding grooves at the outer periphery of the parting surface. The groove opening is perpendicular to the parting surface, and the depth of the demolding groove is 8mm. When demolding is required, a straight tool can be inserted into the demolding groove, and the two half-molds can be separated along the parting surface by applying axial separation force, thereby realizing the opening and closing action of the mold.

[0014] Preferably, the top surface of the inner ring has two symmetrically distributed threaded holes for screwing in a screw to form a grip. This symmetrical structure, with the central axis of the inner ring as a reference, ensures balanced force distribution. In actual operation, the screw portion can be screwed into the threaded hole, at which point the exposed screw portion constitutes a handle structure that is easy to grip. By gripping this handle, the operator can more conveniently complete the installation and removal of the inner ring, effectively improving operational efficiency.

[0015] Preferably, the outer circular surface of the embedded ring is a conical surface that is larger at the top and smaller at the bottom (i.e., the outer diameter of the embedded ring gradually decreases from top to bottom), forming a first draft angle. The surface of the embedded ring that contacts the inner wall of the container base is designed with a slope. This slope structure allows the embedded ring to slide smoothly into the corresponding position on the inner wall of the container base during installation, guided by the slope. At the same time, during disassembly, the guiding effect of the slope can reduce the frictional resistance with the inner wall of the container base, achieving easy separation and significantly reducing the operational difficulty during assembly and disassembly.

[0016] Preferably, the inner circular surface of the embedded ring is a conical surface that is larger at the top and smaller at the bottom (i.e., the inner diameter of the embedded ring gradually decreases from top to bottom), forming a second draft angle. The surface of the embedded ring that contacts the silicone rubber is also provided with a draft angle. This draft angle design plays an important role in the demolding process after the sealing ring is formed: when it is necessary to remove the sealing ring from the embedded ring, the draft angle of the contact surface between the silicone rubber and the embedded ring can form a natural demolding guide, allowing the sealing ring to slide outward along the draft angle under its own elasticity or slight external force. This effectively avoids deformation or damage to the sealing ring due to uneven force during demolding, ensuring the dimensional accuracy and appearance quality of the formed sealing ring.

[0017] Preferably, the cylinder and the container base are respectively provided with mounting screw holes at corresponding positions. By screwing bolts into the corresponding mounting screw holes, the cylinder can be detachably installed on the container base. The protruding structure of the second half mold is provided with mounting screw holes. The axis of the mounting screw holes is perpendicular to the mounting reference plane of the plastic cylinder. In specific assembly, bolts can be inserted through the mounting screw holes at the bottom of the second half mold and screwed into the mounting screw holes at the bottom of the plastic cylinder. This achieves a detachable fixed connection between the plastic cylinder and the container base, thereby limiting the axial and radial displacement of the plastic cylinder during the mold operation process and ensuring the dimensional stability of the molding chamber.

[0018] The diameter of the circular hole on the sealing ring is determined by the diameter of the cable used in the actual test. When the diameter of the test cable changes, the size of the circular hole of the sealing ring can be adjusted by replacing it with a plastic cylinder of the corresponding diameter, so that the sealing ring can be adapted to cables of different diameters, thus improving the versatility and flexibility of the mold.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: 1) Safety: The mold of this utility model is designed with the operator's safety in mind. Its edges are chamfered to eliminate the risk of scratches and avoid accidental injury during operation. At the same time, the embedded ring is specially equipped with a lifting grip to provide a more stable grip point, effectively preventing the mold from slipping and falling due to unstable grip when picking it up, thus fundamentally reducing the probability of crushing injuries.

[0020] 2) Convenience: During the installation phase, the modular mold design allows for easy assembly through simple splicing, significantly reducing preparation time. Demolding eliminates the need for carefully separating the sealing ring from the mold's inner wall with tools; components easily separate, and the sealing ring is directly ejected thanks to the modular structure. The entire process is smooth and efficient, significantly improving production efficiency. Furthermore, the angled structure of the embedded ring further reduces frictional resistance between the sealing ring and the mold, making demolding even easier and smoother.

[0021] 3) Cost-effectiveness: This utility model's mold excels in reducing costs and improving efficiency. It eliminates damage such as scratches and deformation caused by prying, significantly extending the mold's lifespan, reducing equipment procurement costs, and minimizing time and labor costs associated with maintenance. Furthermore, the smoother and gentler demolding process effectively improves the quality of the sealing ring, resulting in a clean and intact finished product without tears, deformation, or other defects. Dimensional stability is also greatly enhanced, effectively increasing the product's pass rate.

[0022] 4) Innovation: The modular design allows for greater exposure of the sealing ring's stress area, changing the traditional concentrated stress points in molds. During demolding, the dispersed force ensures more even distribution of stress on the sealing ring, avoiding damage to the mold and sealing ring caused by the forceful pulling and dragging of traditional demolding methods. This innovative design not only protects the mold and product but also optimizes subsequent production. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the mold structure in the background art; Figure 2 This is a schematic diagram of the first half-mold and the second half-mold before they are assembled in this utility model; Figure 3 This is a schematic diagram of the installation of the cylinder and the container base in this utility model; Figure 4 This is a schematic diagram showing the installation of the stainless steel clamp and the container base in this utility model; Figure 5 This is a schematic diagram showing the installation of the embedded ring and the container base in this utility model; Figure 6 This is a diagram showing the usage state of this utility model; Figure 7 This is a schematic diagram of the cylinder structure in this utility model; In the diagram: Container base 1, first half mold 1-1, second half mold 1-2, positioning screw hole 1-3, annular groove 1-4, mounting screw hole 1-5, demolding groove 1-6, inner ring 2, threaded hole 2-1, cylinder 3, mounting screw hole 3-1, stainless steel clamp 4, sealing ring 5. Detailed Implementation

[0024] A mold for manufacturing a sealing ring for a submarine cable test water terminal includes a container base 1, an inner ring 2, a cylinder 3, and a stainless steel clamp 4.

[0025] The container base 1 is made of aluminum, such as Figure 2 , Figure 3 As shown, a half-mold structure is formed by radially joining a first half-mold 1-1 and a second half-mold 1-2. The parting surface of the first half-mold has a recessed structure, and the parting surface of the second half-mold has a protruding structure that mates with the recessed structure. Positioning screw holes 1-3 are respectively provided at corresponding positions on the parting surfaces of the first and second half-molds. The positioning screw holes penetrate the bottom of both half-molds, and the outer ends of the positioning screw holes are located within an annular groove. By screwing positioning screws into the corresponding positioning screw holes, the first and second half-molds are relatively fixed.

[0026] The outer circumferential surface of the container base is provided with annular grooves 1-4. The cross-sectional dimensions of the annular grooves are adapted to the cross-sectional dimensions of the stainless steel clamps, allowing the stainless steel clamps to be completely fitted into the annular grooves and form surface contact with the outer circumferential surface of the base (e.g., ...). Figure 4 , Figure 5 (As shown).

[0027] The first and second mold halves are provided with demolding grooves 1-6 at the outer periphery of the parting surface. The groove openings are perpendicular to the parting surface, and the depth of the demolding grooves is 8mm. When demolding is required, a straight tool can be inserted into the demolding groove to apply external force to separate the two mold halves along the parting surface.

[0028] The inner ring 2 is made of aluminum, such as Figure 5 As shown, it is set inside the container base to limit the outer diameter of the sealing ring; the top surface of the inner ring has two symmetrically distributed threaded holes 2-1, into which the screw can be screwed, and the exposed screw part forms a handle structure that is easy to hold, facilitating the installation and removal of the inner ring.

[0029] The outer surface of the inner ring is a conical surface that is larger at the top and smaller at the bottom (i.e., the outer diameter of the inner ring gradually decreases from top to bottom), forming the first draft angle. The inner surface of the inner ring is a conical surface that is larger at the top and smaller at the bottom (i.e., the inner diameter of the inner ring gradually decreases from top to bottom), forming the second draft angle.

[0030] Cylinder 3 is made of plastic, such as Figure 7 As shown, the bottom of the mold has a mounting screw hole 3-1, and the protruding structure of the second half mold has a mounting screw hole 1-5. During assembly, the bolt can be inserted through the mounting screw hole at the bottom of the second half mold and screwed into the mounting screw hole at the bottom of the plastic cylinder to achieve a detachable fixed connection between the cylinder and the container base.

[0031] like Figures 2 to 7 As shown, the assembly process of the mold of this utility model is as follows: First, the two half-molds are spliced ​​together according to the concave-convex fit relationship to ensure that the parting surfaces of the two are completely aligned. The positioning screws are inserted from the side and pass through the corresponding positioning screw holes on the two half-molds to achieve the initial positioning of the container base. Then, screw the screws into the screw holes at the bottom of the plastic cylinder to achieve a fixed connection between the plastic cylinder and the base; Next, stainless steel clamps are installed in the annular groove around the container base. By tightening the clamp screws, radial constraint force is applied, so that the two half molds form a closed structure that fits together as a whole. Finally, the embedded ring is placed inside the assembled container base, so that the inner wall of the mold fits tightly against its inclined mating surface.

[0032] After confirming that the mold assembly is correct, silicone rubber is injected. Once the silicone rubber has completely cured and formed a solid sealing ring that perfectly fits the mold cavity, the subsequent demolding operation can begin. The demolding process is carried out in the following steps: First, unscrew and remove the bottom screw that secures the plastic cylinder; Then, loosen the screws of the stainless steel clamp, release the radial restraint force, and remove the clamp. Next, remove the positioning screws of the two half molds, insert a flathead screwdriver into the demolding groove at the joint of the two half molds, and pry the parting surface by lever to separate the two semi-circular bases. Finally, remove the inner ring, and remove the plastic cylinder and the formed sealing ring by pushing, thus completing the entire molding cycle.

Claims

1. A mold for manufacturing a sealing ring for a submarine cable test underwater terminal, characterized in that, include: The container base is composed of a first half mold and a second half mold joined together radially to form a half structure. The parting surface of the first half mold is provided with a recessed structure, and the parting surface of the second half mold is provided with a protruding structure that cooperates with the recessed structure. An inner ring, disposed inside the container base, is used to define the outer diameter of the sealing ring; A cylinder, detachably mounted at the center of the container base, is used to define the inner diameter of the sealing ring; A stainless steel clamp is fitted onto the outer circular surface of the container base to lock and close the first half mold and the second half mold.

2. The mold for manufacturing a sealing ring for a submarine cable test water terminal according to claim 1, characterized in that, The first half mold and the second half mold are respectively provided with positioning screw holes at corresponding positions on the parting surface. The first half mold and the second half mold are fixed relative to each other by screwing positioning screws into the corresponding positioning screw holes.

3. The mold for manufacturing a test underwater terminal sealing ring for a submarine cable according to claim 1, characterized in that, The outer circular surface of the container base is provided with an annular groove, and the stainless steel clamp is fitted into the annular groove.

4. The mold for manufacturing a test underwater terminal sealing ring for a submarine cable according to claim 1, characterized in that, The first half mold and the second half mold are provided with demolding grooves at the outer periphery of the parting surface, and the groove opening direction is perpendicular to the parting surface.

5. The mold for manufacturing a sealing ring for a submarine cable test water terminal according to claim 1, characterized in that, The top surface of the inner ring has two symmetrically distributed threaded holes for screwing in a screw to form a grip.

6. The mold for manufacturing a test underwater terminal sealing ring for a submarine cable according to claim 1, characterized in that, The outer circular surface of the embedded ring is a conical surface that is larger at the top and smaller at the bottom, forming the first draft angle.

7. The mold for manufacturing a sealing ring for a submarine cable test water terminal according to claim 1, characterized in that, The inner circular surface of the embedded ring is a conical surface that is larger at the top and smaller at the bottom, forming a second draft angle.

8. The mold for manufacturing a sealing ring for a submarine cable test water terminal according to claim 1, characterized in that, The cylinder and the container base are respectively provided with mounting screw holes at corresponding positions. By screwing bolts into the corresponding mounting screw holes, the cylinder can be detachably installed on the container base.

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