A rotary insert molding apparatus

Abstract

The present application relates to a kind of rotary inserts insert forming device of class, including piston cylinder, elastic reset component, outside elastic support and inside elastic support, piston cylinder is coaxially arranged between center recess and the outer surface of insert cylinder body part A, the upper end of piston cylinder is blocked, the lower end is open, piston cylinder is movable along the hole depth direction of center recess, elastic reset component applies downward elastic reset force to piston cylinder;Outside elastic support is arranged between upper side annular area and the outer surface of insert cylinder body part B;Inside elastic support is arranged between center protruding column and the inner surface of insert cylinder body part A, inside elastic support is also arranged between lower side annular area and the inner surface of insert cylinder body part B.In insert installation process, it can effectively guarantee insert centering, deviation correction, deflection correction, store original size deviation and local deformation etc., protect product accurate positioning;While storing stress deformation, eliminating stress deflection in forming process, ensure accurate forming.

Description

Technical Field

[0001] This invention relates to the field of insert molding technology, and in particular to an insert molding apparatus for rotary inserts. Background Technology

[0002] Insert molding refers to a molding process in which resin is injected into a mold after a pre-prepared insert of a different material is inserted, and the molten material and the insert are bonded together to form an integrated product.

[0003] Currently, in the field of insert molding, the inserts used are usually small in size, relatively simple in structure, and have high dimensional accuracy. The installation and positioning of the inserts in the mold are relatively simple and controllable. However, for the in-mold molding of some large inserts with large dimensional deviations, large shape errors, and complex structures, the installation, positioning, deviation storage, stress storage, shape control, and property control become very difficult.

[0004] For example, in the production of large, complex, and rotating multi-layered free-form surface structures, the inserts themselves are made of fragile materials such as ceramics and glass, which have a high specific gravity. The shape and dimensional errors of these products are uncontrollable. Even for the same model and batch, the cumulative radial and axial dimensional deviations can reach 10mm or more, with an average deviation of 3-6mm. Similarly, in the production of complex multi-umbrella-shaped workpieces made of glass and ceramics, controlling the shape and dimensions of the workpiece is extremely difficult. Even for a single model and batch of workpieces, the average dimensional deviation of the final fired product can reach 3-6mm, with a maximum of 10mm, and the shape is even more uncontrollable. According to traditional insert mold design techniques and methods, the challenges in installation, positioning, calibration, deviation correction, and storage are fundamental and technical problems that cannot be solved by existing technologies. Furthermore, after nearly 10 years of effort, some companies have achieved a molded insert yield of less than 10%, making industrial-scale production impossible.

[0005] Besides insert installation and positioning, another key aspect of in-mold molding is that the inserts will not shift, deflect, twist, deform, or break due to the filling pressure during the filling process of the molding material. This places higher demands on the strength and rigidity of the inserts themselves, and also requires them to be able to withstand appropriate pressure without breaking. However, for inserts that are heavy and brittle, the pressure threshold is relatively low.

[0006] Furthermore, even within in-mold molding, the stress on inserts comes from both the mold clamping force and the material filling pressure. Traditional in-mold molding processes, such as injection molding, compression molding, and injection compression, utilize thermoplastic or thermosetting materials that are generally in a viscous flow state during filling (for thermosetting materials, this refers to the matrix material), making molding relatively easy and the molding pressure controllable. However, for certain special solid materials, they remain solid or clay-like during filling. While they possess certain viscosity, elasticity, and plasticity, the filling pressure will undoubtedly increase significantly. This is especially true for large, complex products with a molding thickness of less than 5mm, posing a fundamental challenge to the installation and positioning of inserts. In addition, if the solid material also exhibits thermosetting properties, subsequent curing shrinkage and temperature stress will significantly impact the positioning accuracy, strength, and deformation of the mold insert. Technically, eliminating these process interference factors and achieving shape and property control in in-mold insert molding becomes extremely difficult.

[0007] Currently, in the field of insert molding, inserts are generally smaller, lighter, and simpler in structure than ordinary products, and their dimensional accuracy is relatively high. The installation and positioning of in-mold inserts are relatively simple and controllable. However, for the in-mold molding of some large, complex inserts with large dimensional deviations, large shape errors, high specific gravity, and fragile parts, the installation, positioning, error storage, stress storage, and shape and property control of inserts are extremely difficult. In addition, extreme working conditions such as uncontrollable shape and large dimensional dispersion of products in the same batch make insert installation, calibration, and shape and dimensional deviation buffer design fundamental challenges and technical problems that existing technologies cannot solve. Summary of the Invention

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the difficulty in molding large, complex, large dimensional deviation, large shape error, high specific gravity, and fragile inserts in the prior art.

[0009] To solve the above-mentioned technical problems, the present invention provides an insert forming apparatus for a rotary insert, wherein the rotary insert includes an insert cylindrical portion A and an insert cylindrical portion B coaxially arranged, one end of the insert cylindrical portion A is closed and the other end is open, one end diameter of the insert cylindrical portion B is smaller than the other end diameter, and the open end of the insert cylindrical portion A is connected to the smaller diameter end of the insert cylindrical portion B. The insert forming apparatus includes:

[0010] The upper mold has a parting surface with a central recess and an upper annular area. The upper annular area surrounds the outside of the central recess, and the central recess is recessed relative to the upper annular area.

[0011] The lower mold has a parting surface with a central protrusion and a lower annular area. The lower annular area surrounds the outside of the central protrusion, and the central protrusion protrudes relative to the lower annular area.

[0012] After the upper mold and the lower mold are engaged, they form a cavity, and the parting surface of the upper mold is in contact with the parting surface of the lower mold. The rotary insert is disposed in the cavity. The insert cylindrical part A extends into the central recess, and the central protrusion extends into the inner side of the insert cylindrical part A. The upper annular area is located on the outer side of the insert cylindrical part B, and the lower annular area is located on the inner side of the insert cylindrical part B.

[0013] The insert forming apparatus further includes:

[0014] A positioning assembly includes a piston cylinder and an elastic reset component. The piston cylinder is coaxially disposed between the central concave hole and the outer surface of the insert cylinder A. The upper end of the piston cylinder is sealed and the lower end is open. The piston cylinder is movable along the depth direction of the central concave hole. The elastic reset component applies a downward elastic reset force to the piston cylinder.

[0015] An outer support assembly, the outer support assembly including an outer elastic support body, the outer elastic support body being disposed between the upper annular region and the outer surface of the insert cylindrical portion B;

[0016] An inner elastic support is provided between the central protrusion and the inner surface of the insert cylinder A, and the inner elastic support is also provided between the lower annular area and the inner surface of the insert cylinder B.

[0017] In one embodiment of the present invention, the central concave hole extends through the upper surface of the upper mold, and a pressure plate is detachably connected to the upper port of the central concave hole, and the piston cylinder is connected to the pressure plate.

[0018] In one embodiment of the present invention, a first guide post is connected to the lower side of the pressure plate, and a first guide sleeve is connected to the upper end of the piston cylinder. The first guide sleeve is slidably connected to the first guide post, and the first guide sleeve is also slidably connected to the central concave hole in an irremovable manner.

[0019] In one embodiment of the present invention, a second guide post is also connected to the lower side of the pressure plate, and the elastic reset component is a spring sleeved on the second guide post, with the two ends of the spring respectively abutting against the pressure plate and the first guide sleeve.

[0020] In one embodiment of the present invention, the outer elastic support is an outer elastic sealing ring, and the inner elastic support is an inner elastic sealing ring.

[0021] In one embodiment of the present invention, one of the inner elastic sealing rings is a first inner elastic sealing ring, which is disposed at the junction of the insert cylinder portion A and the insert cylinder portion B.

[0022] In one embodiment of the present invention, the junction of the inner surface of the insert cylinder A and the inner surface of the insert cylinder B is a conical surface, the outer contour of the longitudinal section of the first inner elastic sealing ring is an isosceles trapezoid, and the junction of the insert cylinder A and the insert cylinder B matches the shape of the first inner elastic sealing ring.

[0023] In one embodiment of the present invention, the open end of the insert cylinder A extends into the small-diameter end of the insert cylinder B, the longitudinal section of the first inner elastic sealing ring is saddle-shaped, and the junction of the insert cylinder A and the insert cylinder B matches the shape of the first inner elastic sealing ring.

[0024] In one embodiment of the present invention, one of the inner elastic sealing rings is a second inner elastic sealing ring, which is disposed between the insert cylindrical portion B and the lower annular region.

[0025] In one embodiment of the present invention, a wear-resistant ring is further provided between the upper annular region and the outer surface of the insert cylindrical portion B.

[0026] Compared with the prior art, the above-mentioned technical solution of the present invention has the following advantages: The insert molding device for rotary inserts of the present invention, after the insert is placed into the lower mold, the insert contacts the elastic ring and the inner elastic sealing ring, and automatically centers and presses under its own gravity. During the downward movement of the upper mold, the piston cylinder corrects the axial deviation of the insert. After the mold is closed, the elastic ring on the inner side of the insert is further compressed for calibration and coordinated deformation, storing the radial and axial dimensional deviations of the insert. The outer elastic sealing ring and the inner elastic sealing ring press the insert up and down, further storing the axial deviation of the insert. At the same time, the insert is installed, positioned and the molded product is sealed. During the production process, the axial pressure of the insert and the product can be buffered and eliminated by the spring, elastic ring, outer elastic sealing ring and inner elastic sealing ring; the radial stress can be eliminated or stored by the coordinated operation of the piston cylinder, spring, elastic ring, etc., thereby ensuring that the insert is not easily damaged during the molding process and the product molding quality is reliable. Attached Figure Description

[0027] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0028] Figure 1 This is a front view of the insert forming apparatus for rotary inserts disclosed in Embodiment 1 of the present invention;

[0029] Figure 2 This is a side view of the insert forming apparatus for a rotary insert disclosed in Embodiment 1 of the present invention;

[0030] Figure 3 This is a front view of the insert forming apparatus for rotary inserts disclosed in Embodiment 2 of the present invention.

[0031] Explanation of reference numerals in the accompanying drawings: 1. Insert; 11. Insert cylinder A; 12. Insert cylinder B; 2. Upper mold; 21. Central recess; 22. Upper annular area; 3. Lower mold; 31. Central protrusion; 32. Lower annular area; 41. Piston cylinder; 42. Elastic reset component; 43. Outer elastic support; 44. Inner elastic support; 45. Pressure plate; 46. First guide post; 47. First guide sleeve; 48. Second guide post; 49. Wear-resistant ring. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0033] Example 1: See Figure 1 and Figure 2 As shown, an insert forming apparatus for a rotary insert is disclosed. The rotary insert 1 includes an insert cylindrical portion A11 and an insert cylindrical portion B12 coaxially arranged. One end of the insert cylindrical portion A11 is closed, and the other end is open. The diameter of one end of the insert cylindrical portion B12 is smaller than the diameter of the other end. The open end of the insert cylindrical portion A11 is connected to the smaller diameter end of the insert cylindrical portion B12. The insert forming apparatus includes:

[0034] The upper mold 2 has a central recessed hole 21 and an upper annular area 22 on its parting surface. The upper annular area 22 surrounds the outside of the central recessed hole 21, and the central recessed hole 21 is recessed relative to the upper annular area 22.

[0035] The lower mold 3 has a parting surface with a central protrusion 31 and a lower annular area 32. The lower annular area 32 surrounds the outside of the central protrusion 31, and the central protrusion 31 protrudes relative to the lower annular area 32.

[0036] After the upper mold 2 and the lower mold 3 are aligned, they form a cavity and the parting surface of the upper mold 2 contacts the parting surface of the lower mold 3. The rotary insert 1 is placed in the cavity. The insert cylindrical part A11 extends into the central recess 21, and the central protrusion 31 extends into the inner side of the insert cylindrical part A12. The upper annular area 22 is located on the outer side of the insert cylindrical part B12, and the lower annular area 32 is located on the inner side of the insert cylindrical part B12.

[0037] The insert forming apparatus also includes:

[0038] The positioning assembly includes a piston cylinder 41 and an elastic reset component 42. The piston cylinder 41 is coaxially disposed between the central concave hole 21 and the outer surface of the insert cylinder A11. The upper end of the piston cylinder 41 is sealed and the lower end is open. The piston cylinder 41 is movable along the depth direction of the central concave hole 21. The elastic reset component 42 applies a downward elastic reset force to the piston cylinder 41.

[0039] The outer support assembly includes an outer elastic support 43, which is disposed between the upper annular region 22 and the outer surface of the insert cylindrical portion B12.

[0040] The inner elastic support 44 is disposed between the central protrusion 31 and the inner surface of the insert cylinder portion A11, and the inner elastic support 44 is also disposed between the lower annular area 32 and the inner surface of the insert cylinder portion B12.

[0041] The aforementioned rotary insert is a large, complex, multi-layered freeform surface structure. The aforementioned piston cylinder and elastic reset component can correct and fine-tune the rotary insert, and the aforementioned outer elastic support and inner elastic support can absorb deformation.

[0042] The insert molding device for rotary inserts of the present invention, after the insert is placed in the lower mold, the insert contacts the inner elastic support and automatically centers and presses itself under its own gravity. During the downward movement of the upper mold, the piston cylinder corrects the axial deviation of the insert. After the mold closes, the inner elastic support on the inner side of the insert is further compressed for calibration and coordinated deformation, storing the radial and axial dimensional deviations of the insert. The outer elastic support and the inner elastic support press the rotary insert together, further storing the axial deviation of the rotary insert, and simultaneously realizing the installation and positioning of the insert. During the production process, the axial pressure of the insert and the product can be buffered and eliminated by the elastic reset component, the outer elastic support, and the inner elastic support. The radial stress of the insert and the product can be eliminated or stored by the coordinated operation of the piston cylinder, the elastic reset component, the outer elastic support, and the inner elastic support, thereby ensuring that the insert is not easily damaged during the molding process and the product molding quality is reliable.

[0043] After the rotary insert is positioned, an injection space is formed around the lower free end of the insert cylinder B. After thermoplastic or thermosetting material is injected into the injection space, an overlay layer is formed on the outer side of the insert cylinder B near the lower end.

[0044] The aforementioned rotary inserts are brittle, fragile, easily deformable under stress, large, or have large dimensional deviations. By incorporating an axial-radial adaptive positioning mechanism, an axial-radial adaptive adjustment mechanism, an elastic ring, an outer elastic sealing ring, and an inner elastic sealing ring, dimensional deviations can be stored.

[0045] In this preferred embodiment, the central recess 21 penetrates the upper surface of the upper mold 2, and a pressure plate 45 is detachably connected to the upper port of the central recess 21. The piston cylinder 41 is connected to the pressure plate 45. By setting the pressure plate, the pressure plate and positioning components can be assembled first, and then the pressure plate can be connected and fixed to the upper mold.

[0046] In this preferred embodiment, a first guide post 46 is connected to the lower side of the pressure plate 45, and a first guide sleeve 47 is connected to the upper end of the piston cylinder 41. The first guide sleeve 47 is slidably connected to the first guide post 46, and is also slidably connected to the central recess 21 without detachment. The central recess includes an upper section and a lower section. The diameter of the upper section of the central recess is larger than the diameter of the lower section. The size of the first guide sleeve matches the size of the upper section of the central recess, and the size of the piston cylinder matches the size of the lower section of the central recess. In this way, the piston cylinder can slide up and down relative to the upper mold, but cannot detach from the upper mold downwards.

[0047] In this preferred embodiment, a second guide post 48 is connected to the lower side of the pressure plate 45. The elastic reset component 42 is a spring sleeved on the second guide post 48, with both ends of the spring abutting against the pressure plate 45 and the first guide sleeve 47, respectively. Between the pressure plate and the piston cylinder, one is fixedly connected to the second guide post, while the other slides relative to the second guide post. When the second guide post is fixedly connected to the pressure plate, the second guide post and the piston cylinder can slide relative to each other. When the second guide post is fixedly connected to the piston cylinder, the second guide post and the pressure plate can slide relative to each other. By providing a third guide post, the spring will not fall off, and the direction of the elastic reset force is stable.

[0048] In this preferred embodiment, the outer elastic support 43 is an outer elastic sealing ring, and the inner elastic support 44 is an inner elastic sealing ring. The elastic sealing ring provides better elastic support and can be purchased as a finished product. In other embodiments, both the outer and inner elastic supports can be granular, with multiple outer supports evenly distributed circumferentially to achieve uniform contact with the outer surface of the insert cylinder portion B, and multiple inner elastic supports evenly distributed circumferentially to achieve uniform contact with the inner surfaces of both the insert cylinder portion A and the insert cylinder portion B.

[0049] In this preferred embodiment, one of the inner elastic sealing rings is a first inner elastic sealing ring, which is located at the junction of the insert cylinder portion A11 and the insert cylinder portion B12. The first inner elastic sealing ring can be supported both between the insert cylinder portion A and the central protrusion, and between the insert cylinder portion B and the lower annular area, thus simplifying the structure of the inner support assembly. A locating pin is provided on the lower mold, and the central protrusion is sleeved on the outside of the locating pin. The central protrusion is a cylinder, which can achieve a good fit with the insert cylinder portion A. Specifically, since the central protrusion is sleeved on the outside of the locating pin, the outer diameter of the central protrusion is larger than the outer diameter of the locating pin. A certain gap is reserved between the lower end of the central protrusion and the parting surface of the lower mold. The lower annular end face of the central protrusion, the parting surface of the lower mold, and the outer surface of the locating pin form an annular groove. The annular end face of the central protrusion and the parting surface of the lower mold serve as the sidewalls of the annular groove, and the outer surface of the locating pin serves as the bottom of the annular groove. The first inner elastic ring is positioned in the annular groove on the central protrusion. In other embodiments, the two inner elastic sealing rings may each be a third inner elastic sealing ring and a fourth elastic sealing ring. The third inner elastic sealing ring is located between the insert cylinder portion A11 and the central protrusion, and the fourth inner elastic sealing ring is located between the insert cylinder portion B12 and the lower annular area.

[0050] In this preferred embodiment, the junction between the inner surfaces of the insert cylinder portion A11 and the inner surfaces of the insert cylinder portion B12 is a conical surface. The longitudinal cross-sectional outer contour of the first inner elastic sealing ring is an isosceles trapezoid. The junction between the insert cylinder portion A11 and the insert cylinder portion B12 matches the shape of the first inner elastic sealing ring. The upper port diameter of the conical surface is smaller, the lower port diameter is larger, the upper radial dimension of the outer surface of the first inner elastic sealing ring is smaller, and the lower radial dimension of the outer surface of the first inner elastic sealing ring is larger.

[0051] In this preferred embodiment, one of the inner elastic sealing rings is a second inner elastic sealing ring, which is located between the insert cylinder portion B12 and the lower annular region 32. The first inner elastic sealing ring mainly serves as an elastic support, while the second inner elastic sealing ring provides both elastic support and sealing. The outer elastic sealing ring also provides elastic support and sealing. The second and outer elastic sealing rings isolate the injection space from other parts of the cavity, achieving product sealing.

[0052] Structural principle:

[0053] 1. Rotational inserts: Irregular, complex, large rotating bodies (Ф≥390mm), wall thickness 12-20mm, large average dimensional deviation (≥3-6mm), maximum up to 7mm; brittle, fragile, and easily deformable inserts.

[0054] 2. Product: Made of plastic and rubber, with a coating thickness of 2-8mm.

[0055] 3. Outer edge axial and radial adaptive positioning mechanism: pressure plate, spring, second guide post, piston cylinder, central concave hole, first guide post.

[0056] 4. Inner hole radial and axial adaptive adjustment mechanism: central protrusion, positioning pin, inner elastic sealing ring.

[0057] 5. Sealing and calibration mechanism: outer elastic sealing ring and second inner elastic sealing ring.

[0058] 6. Rigid clamping mechanism: upper mold, lower mold, base.

[0059] 7. Process: The molding processes applicable to this invention include injection molding, injection compression molding, and compression molding.

[0060] Assembly relationship:

[0061] 1. Upper mold: The pressure plate is connected to the upper mold with screws; the inner cavity of the piston cylinder is clearance-fitted with the insert cylinder part A of the rotary insert, and the outer side is transition-fitted with the central concave hole. The height dimension of the piston cylinder is calculated according to the axial deviation of the product and transition-fitted with the first guide post; the outer elastic sealing ring is interference-fitted with the annular groove on the upper annular area.

[0062] 2. Lower mold: The central protrusion is threadedly fastened to the positioning pin; the positioning pin is threadedly fastened to the lower mold; it is interference-fitted with the first inner elastic sealing ring and the positioning pin, the upper end of the first inner elastic sealing ring is pressed by the central protrusion, and the lower end of the first inner elastic sealing ring is limited by the lower mold; the second inner elastic sealing ring is interference-fitted with the annular groove on the lower annular area.

[0063] Mechanism of action:

[0064] 1. Preform assembly and rough positioning: Open the mold parting surface and the lower end surface of the upper mold, and put in the insert according to the structure shown in the figure. The inner hole of the insert cylinder A is fitted onto the central convex post and the lower mold, and contacts the inner elastic sealing ring. Under its own gravity, it automatically centers and is pressed.

[0065] 2. Adaptive fine adjustment: As the upper mold moves down, the insert cylinder A of the rotary insert is fitted into the inner hole of the piston cylinder until the upper end face of the insert cylinder A contacts the bottom of the piston cylinder. As the mold continues to move down and gradually close, the piston cylinder moves up under the combined action of the central concave hole, the first guide post, the spring, and the second guide post. The spring is compressed appropriately to correct the axial deviation of the insert.

[0066] 3. Adaptive storage: During the mold closing process, the first inner elastic sealing ring is further compressed and calibrated to coordinate deformation and store the radial and axial dimensional deviations of the insert; the outer elastic sealing ring and the second inner elastic sealing ring press the insert tightly from top to bottom to further store the axial deviation of the insert, while realizing the installation, positioning and sealing of the molded product.

[0067] 4. Product Protection: During production, the axial pressure on the insert and product can be buffered and eliminated by elastic elements such as springs, outer elastic sealing rings, and inner elastic sealing rings; radial stress can be eliminated or stored by the coordinated operation, deformation, and other mechanisms of the piston cylinder, springs, outer elastic sealing rings, and inner elastic sealing rings. This ensures that the insert is not easily damaged during molding and that the product molding quality is reliable.

[0068] 5. This invention is applicable to brittle, fragile inserts and inserts that are easily deformed under stress.

[0069] Example 2: See Figure 3 As shown in the illustration, in the preferred embodiment of this example, the open end of the insert cylinder A extends into the small-diameter end of the insert cylinder B, the longitudinal section of the first inner elastic sealing ring is saddle-shaped, and the junction of the insert cylinder A and the insert cylinder B matches the shape of the first inner elastic sealing ring.

[0070] In this preferred embodiment, a wear-resistant ring 49 is further provided between the upper annular region and the outer surface of the insert cylinder portion B. The wear-resistant ring has a certain degree of elasticity and is a sacrificial part that can be disassembled and replaced after a certain number of uses.

[0071] In this preferred embodiment, the outer elastic sealing ring is for adjustment purposes, and the second inner elastic sealing ring is not provided.

[0072] Workpiece type: Rotary complex structure, multi-umbrella structure with 2 or 3 umbrellas, each umbrella type has different size and structure, the material is brittle and fragile materials such as porcelain and glass, the product has a high specific gravity, the maximum radial dimension of the product (365mm), the wall thickness is 12-20mm, the dimensional deviation is large, the average dimensional deviation is 3-6mm, and the maximum can reach 10mm; the shape error is large and uncontrollable.

[0073] Mechanism of action:

[0074] 1. Workpiece assembly: Open the upper and lower molds, place the rotary insert according to the structure shown in the figure, and fit it on the central protrusion.

[0075] 2. Coarse positioning: Rotary inserts automatically center under their own gravity, pressing the first inner elastic ring with a certain degree of elasticity.

[0076] 3. Fine adjustment: The bottom end is fixed and the top end moves downward. The insert cylinder A of the rotary insert contacts the wear-resistant ring. The wear-resistant ring has a certain elasticity and is a sacrificial part. It can be disassembled and replaced after a certain number of batches are used. Under the circumferential adjustment of the wear-resistant ring, the workpiece is finely adjusted axially, vertically and centered, and the radial dimensional deviation of the workpiece is eliminated at the same time.

[0077] 4. Secondary fine adjustment: The upper end continues to move downward, the piston cylinder contacts the upper end face of the workpiece, the piston cylinder hugs the workpiece, and at the same time moves upward in the central concave hole together with the first guide sleeve. This process realizes secondary fine adjustment, eliminates radial dimension deviation of the workpiece, and when the upper and lower ends are closed in place, the spring is in a compressed state, pressing the workpiece, and storing the axial dimension deviation of the workpiece.

[0078] 5. Three-stage calibration and locking: The upper and lower ends are completely closed and pressed together. At the same time, the wear-resistant ring, the first inner elastic sealing ring, and the outer elastic sealing ring are pressurized and clamped to further eliminate the axial dimension deviation of the workpiece, and complete the installation, positioning, and calibration of the workpiece.

[0079] 6. Forming protection: During the cold and hot processing of the workpiece, if the workpiece is not subjected to deflection force, it will maintain precise positioning. Once subjected to radial deflection force, the piston cylinder and wear ring will work together to limit deflection, store stress, and protect the workpiece.

[0080] This invention addresses the technical challenges of installing, securing, and precisely positioning large, complex, multi-umbrella-shaped components with significant dimensional deviations. It aims to eliminate the adverse effects of original radial and axial dimensional deviations and shape errors during the clamping cycle, and to store unbalanced stress deviations and form and position errors during cold and hot processing and subsequent part removal cycles, thereby protecting the workpiece from damage and providing a feasible assembly solution for the forming and processing of such workpieces.

[0081] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An insert forming apparatus for a rotary insert, the rotary insert comprising an insert cylindrical portion A and an insert cylindrical portion B coaxially arranged, one end of the insert cylindrical portion A being closed and the other end being open, one end of the insert cylindrical portion B having a smaller diameter than the other end, the open end of the insert cylindrical portion A being connected to the smaller diameter end of the insert cylindrical portion B, the insert forming apparatus comprising: The upper mold has a parting surface with a central recess and an upper annular area. The upper annular area surrounds the outside of the central recess, and the central recess is recessed relative to the upper annular area. The lower mold has a parting surface with a central protrusion and a lower annular area. The lower annular area surrounds the outside of the central protrusion, and the central protrusion protrudes relative to the lower annular area. After the upper mold and the lower mold are engaged, they form a cavity, and the parting surface of the upper mold is in contact with the parting surface of the lower mold. The rotary insert is disposed in the cavity. The insert cylindrical part A extends into the central recess, and the central protrusion extends into the inner side of the insert cylindrical part A. The upper annular area is located on the outer side of the insert cylindrical part B, and the lower annular area is located on the inner side of the insert cylindrical part B. The insert forming apparatus is characterized in that it further includes: A positioning assembly includes a piston cylinder and an elastic reset component. The piston cylinder is coaxially disposed between the central concave hole and the outer surface of the insert cylinder A. The upper end of the piston cylinder is sealed and the lower end is open. The piston cylinder is movable along the depth direction of the central concave hole. The elastic reset component applies a downward elastic reset force to the piston cylinder. An outer support assembly, the outer support assembly including an outer elastic support body, the outer elastic support body being disposed between the upper annular region and the outer surface of the insert cylindrical portion B; An inner elastic support is provided between the central protrusion and the inner surface of the insert cylinder A, and the inner elastic support is also provided between the lower annular area and the inner surface of the insert cylinder B.

2. The insert forming apparatus according to claim 1, characterized in that, The central concave hole extends through the upper surface of the upper mold, and a pressure plate is detachably connected to the upper port of the central concave hole. The piston cylinder is connected to the pressure plate.

3. The insert forming apparatus according to claim 2, characterized in that, The lower side of the pressure plate is connected to a first guide post, and the upper end of the piston cylinder is connected to a first guide sleeve. The first guide sleeve is slidably connected to the first guide post, and the first guide sleeve is also slidably connected to the central concave hole in an inseparable manner.

4. The insert forming apparatus according to claim 3, characterized in that, The lower side of the pressure plate is also connected to a second guide post, and the elastic reset component is a spring sleeved on the second guide post, with the two ends of the spring abutting against the pressure plate and the first guide sleeve, respectively.

5. The insert forming apparatus according to claim 1, characterized in that, The outer elastic support is an outer elastic sealing ring, and the inner elastic support is an inner elastic sealing ring.

6. The insert forming apparatus according to claim 5, characterized in that, One of the inner elastic sealing rings is a first inner elastic sealing ring, which is located at the junction of the insert cylinder portion A and the insert cylinder portion B.

7. The insert forming apparatus according to claim 6, characterized in that, The junction between the inner surface of the insert cylinder A and the inner surface of the insert cylinder B is a conical surface. The outer contour of the longitudinal section of the first inner elastic sealing ring is an isosceles trapezoid. The junction between the insert cylinder A and the insert cylinder B matches the shape of the first inner elastic sealing ring.

8. The insert forming apparatus according to claim 6, characterized in that, The open end of the insert cylinder A extends into the small-diameter end of the insert cylinder B. The longitudinal section of the first inner elastic sealing ring is saddle-shaped. The junction of the insert cylinder A and the insert cylinder B matches the shape of the first inner elastic sealing ring.

9. The insert forming apparatus according to claim 5, characterized in that, One of the inner elastic sealing rings is a second inner elastic sealing ring, which is disposed between the insert cylinder portion B and the lower annular area.

10. The insert forming apparatus according to claim 1, characterized in that, A wear-resistant ring is also provided between the upper annular area and the outer surface of the insert cylindrical part B.

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