Injection mold with easy disassembly

Abstract

The utility model provides a kind of injection mold convenient to split, it is related to injection mold structure technology, specifically discloses mounting seat and fixed mould, fixed mould is installed on the side wall of mounting seat, the outside wall of fixed mould is provided with several movable moulds, several movable moulds are set on the outside of fixed mould along the circumferential direction of fixed mould, several movable moulds successively assembled are similar circular table structure, the side of similar circular table structure deviating from mounting seat has feed inlet, and the inside of similar circular table structure has main body chamber, the bottom of main body chamber is closed after the partial embedding of fixed mould in main body chamber, the top of fixed mould is provided with with the auxiliary body chamber that communicates with main body chamber, mounting seat is equipped with for guiding several movable moulds synchronous movement guide structure, the synchronous radial movement of all movable moulds is realized by the cooperation of guide groove and guide strip under the cooperation of the 4 movable moulds around fixed mould;Make movable mould when opening mould can quickly, consistently separate.

Description

Technical Field

[0001] This utility model relates to the field of injection mold structure technology, and more specifically, to an injection mold that is easy to disassemble. Background Technology

[0002] In the field of precision plastic mold manufacturing, rotating products (such as bottle caps, gears, and decorative parts) often require the assembly of multiple parts. Traditional processing methods typically employ a split-mold structure, where each part constituting the cavity is individually machined before assembly. However, ensuring strict concentricity and roundness after assembly is difficult, leading to decreased geometric accuracy in the final product. This affects assembly and performance, and breaks are easily created at the joints between parts, resulting in noticeable seams or uneven areas on the product surface, severely impacting appearance quality and surface roughness. This is especially true for products requiring high gloss or mirror finishes. Utility Model Content

[0003] The purpose of this utility model is to provide an injection mold that is easy to disassemble, which addresses the shortcomings of the prior art and solves the problems mentioned in the background.

[0004] The technical solution of this utility model is implemented as follows:

[0005] This utility model provides an injection mold that is easy to disassemble, including a mounting base and a fixed mold. The fixed mold is mounted on the side wall of the mounting base. Several movable molds are arranged around the outer side of the fixed mold. The movable molds are arranged around the outside of the fixed mold in a circumferential direction. The movable molds are assembled in sequence in a frustum-like structure. The frustum-like structure has a feed port on the side away from the mounting base. The frustum-like structure has a main cavity. The fixed mold is partially embedded in the main cavity and then the bottom of the main cavity is closed. The top of the fixed mold has a secondary cavity that communicates with the main cavity. The mounting base is provided with a guide structure for guiding the synchronous movement of the movable molds.

[0006] In some technical solutions of this utility model, the top of the frustum-like structure is detachably provided with a sprue mold, a portion of which is embedded in the inlet, and the sprue mold is connected to the main cavity.

[0007] In some technical solutions of this utility model, an ejection channel is provided in the fixed mold along its axial direction, the ejection channel is connected to the secondary body cavity, and a guide tube structure is provided in the ejection channel.

[0008] In some technical solutions of this utility model, a cooling chamber structure is provided between the outer wall of the conduit structure and the inner wall of the ejection channel, and a channel structure communicating with the chamber structure is provided on the outer wall of the fixed mold.

[0009] In some technical solutions of this utility model, patterned structures are formed on the internal surface of the moving mold.

[0010] In some technical solutions of this utility model, a fixed seat is sleeved on the outer side wall of the fixed mold, and an installation port adapted to the fixed seat is opened on the side wall of the mounting seat.

[0011] In some technical solutions of this utility model, the guide structure includes guide grooves corresponding to a number of moving molds. The guide grooves are arranged on the side wall of the mounting base along the radial direction of the fixed mold. The moving molds are slidably arranged in the guide grooves. Two guide strips are installed in the guide grooves. Limiting grooves that fit the guide strips are opened on both sides of the moving molds.

[0012] In some technical solutions of this utility model, a slanted guide hole is provided in the split mold. The angle between the reverse extension line of the slanted guide hole and the axis of the fixed mold is an acute angle. A matching slanted guide post is inserted into the slanted guide hole. A through hole is provided on the side wall of the mounting base. The slanted guide post is inserted into the through hole and extends outward.

[0013] Compared with the prior art, this utility model has at least the following advantages or beneficial effects: By using four moving molds surrounding the fixed mold in conjunction with guide grooves and guide strips, synchronous radial movement of all moving molds is achieved; this allows the moving molds to separate quickly and consistently during mold opening, significantly simplifying operation and solving the problem of difficult demolding of traditional complex molds. The guide structure composed of guide grooves and guide strips ensures that the moving molds can only slide radially, guaranteeing accurate alignment of multiple moving molds during mold closing. The resulting "quasi-frustum structure" is tightly closed, effectively reducing flash and burrs on injection molded products, improving product dimensional accuracy and stability. The cooling chamber formed by the guide tube structure on the outside of the ejector pin and the ejection channel can be connected to a cooling system to accelerate heat dissipation from the fixed mold, shorten the molding cycle, or reduce air bubbles using a vacuum exhaust system, improving product density and enhancing product internal quality. The ejector pin is pushed by a servo pusher structure, ensuring uniform thrust and avoiding product deformation or damage caused by improper manual or mechanical ejection, thus ensuring product integrity after demolding. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the moving mold and the fixed mold in this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the injection cavity formed by the combination of the moving mold and the fixed mold of this utility model.

[0016] Figure 3 This is a cross-sectional view of the moving mold and the fixed mold in this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the mold in this utility model.

[0018] Figure 5 This is a top view of the fixed mold in this utility model.

[0019] Figure 6 for Figure 5 Schematic sectional view along the AA direction.

[0020] Figure 7 for Figure 5 Schematic sectional view along the middle BB direction.

[0021] Figure 8 This is a three-dimensional structural diagram of the combined moving mold in this utility model.

[0022] Figure 9 This is a three-dimensional structural diagram of the main cavity formed by the combination of the moving mold in this utility model.

[0023] Figure 10 This is a three-dimensional structural diagram of a single moving mold in this utility model.

[0024] Figure label:

[0025] 1. Moving mold; 2. Angled guide hole; 3. Guide groove; 4. Angled guide post; 5. Sprue mold; 6. Mounting base; 7. Fixed mold; 8. Fixing base; 9. Guide bar; 10. Split mold; 12. Conduit structure; 13. Chamber structure. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0028] Example

[0029] This utility model provides an injection mold that is easy to disassemble, such as Figures 1-10As shown, the device includes a mounting base 6 and a fixed mold 7. The fixed mold 7 is mounted on the side wall of the mounting base 6. Several moving molds 1 are arranged around the outer side wall of the fixed mold 7. The moving molds 1 are arranged around the outer side of the fixed mold 7 in a circumferential manner. The moving molds 1 are assembled in a frustum-like structure. The moving molds 1 are distributed circumferentially on the outer side wall of the fixed mold 7 and the four moving molds 1 are separated synchronously by a guide structure. This avoids the difficulty of demolding caused by the complex structure of traditional molds. When the frustum-like structure is closed, it fits tightly, reducing flash of the injection molded product and improving the dimensional stability of the product. The frustum-like structure has a feed port on the side away from the mounting base 6. The frustum-like structure has a main cavity. The fixed mold 7 is partially embedded in the main cavity and then the bottom of the main cavity is closed. The top of the fixed mold 7 has a secondary cavity that communicates with the main cavity. The mounting base 6 is provided with a guide structure for guiding the synchronous movement of the moving molds 1. By arranging four moving molds 1 around a fixed mold 7 to form a frustum-like structure, and using a guiding structure to achieve synchronous radial movement of the four moving molds 1, a closed injection cavity is formed when the mold is closed, and the moving molds 1 are quickly separated to remove the product when the mold is opened. In the mold closing stage: the moving molds 1 slide along the guide groove 3 of the mounting base 6 towards the center of the fixed mold 7, assembling into a frustum-like structure. The top of the fixed mold 7 is embedded in the bottom of the main cavity, forming a closed injection space composed of the main cavity and the secondary cavity. In the injection stage: molten material is injected into the main cavity from the inlet, filling the secondary cavity and cooling to form the mold. In the mold opening stage: the guiding structure guides the moving molds 1 to slide outward synchronously, the frustum-like structure separates, exposing the molded part, and then the product is ejected.

[0030] In some technical solutions of this utility model, a sprue mold 5 is detachably provided on the top of the frustum-like structure. The sprue mold 5 is partially embedded in the inlet, and the sprue mold 5 is connected to the main cavity. The detachable design of the sprue mold 5 and the frustum-like structure allows the gating system to be connected to the main cavity by fitting the sprue mold 5 into the inlet, and allows for quick replacement. In specific operation, the sprue mold 5 is installed on the top of the frustum-like structure, and its lower end is embedded in the inlet to form an injection channel. After injection molding is completed, the sprue mold 5 can be disassembled separately to clean residual material or to replace it with a different type (such as a point gate or side gate). By replacing the sprue mold 5 or adjusting the pattern of the moving mold 1, different product requirements can be met.

[0031] In some technical solutions of this utility model, an ejection channel is provided in the fixed mold 7 along its axial direction, and the ejection channel is connected to the secondary body cavity.

[0032] In some technical solutions of this utility model, a cooling chamber structure 13 is provided between the outer wall of the conduit structure 12 and the inner wall of the ejection channel. A channel structure communicating with the chamber structure 13 is provided on the outer wall of the fixed mold 7. The conduit structure 12 and the ejection channel form a cooling chamber, which is connected to a cooling / exhausting system through an external channel to achieve mold temperature control or exhaust, realize directional cooling to improve heat dissipation efficiency, and shorten the molding cycle of the product. In specific operation, it is divided into a cooling stage and an injection stage. During the cooling stage, the cooling medium is injected into the chamber through the channel structure and flows around the conduit to accelerate the heat dissipation of the fixed mold 7. During the injection stage, the chamber structure 13 can be connected to a vacuum pump to extract the gas in the main chamber, reduce bubble defects, and improve the density of the product.

[0033] An ejector rod is inserted inside the conduit structure 12. After mold opening, the ejector rod moves upward along the ejection channel, contacts the bottom of the product and applies a pushing force, causing the product to detach from the secondary body cavity. After separating from the moving mold 1, it falls freely or is picked up by a robot. During the process of the ejector rod pushing the molded part out of the secondary body cavity through the axial ejection channel of the fixed mold 7, the ejector rod is pushed by a servo pusher structure to ensure that the pushing force is uniform, avoiding deformation or damage to the product caused by manual ejection. The above structure realizes automated demolding, and the use of mechanical ejection reduces manual operation and improves production efficiency.

[0034] In some technical solutions of this utility model, patterned structures are formed on the inner surface of the moving mold 1. The patterned structure on the inner surface of the moving mold 1 directly forms textures or markings on the product surface. During injection molding, the molten material fills the patterned structure, and after cooling, the corresponding texture is replicated on the product surface. After mold opening, the pattern automatically ejects along with the moving mold 1, requiring no further processing. The patterned structure on the inner surface of the moving mold 1 can also be processed using an electrical discharge machining (EDM) machine to form complex patterns.

[0035] In some technical solutions of this utility model, a fixed seat 8 is sleeved on the outer side wall of the fixed mold 7. The fixed seat 8 has a sleeve-like structure, and an installation opening adapted to the fixed seat 8 is opened on the side wall of the mounting seat 6. The fixed mold 7 is inserted into the installation opening of the mounting seat 6 through the outer fixed seat 8 to prevent the fixed mold 7 from shaking or shifting. When the mold is closed, the radial force applied by the moving mold 1 to the fixed mold 7 is distributed from the fixed seat 8 to the mounting seat 6 to prevent the fixed mold 7 from shifting and to ensure that the fixed mold 7 maintains its positional accuracy during high-pressure injection molding. The fixed mold 7 and the fixed seat 8 are modularly designed, and the fixed mold 7 can be quickly disassembled and replaced.

[0036] In some technical solutions of this utility model, the guiding structure includes guide grooves 3 corresponding one-to-one with several moving molds 1. The guide grooves 3 are arranged radially along the fixed mold 7 on the side wall of the mounting base 6. The moving molds 1 are slidably disposed in the guide grooves 3. Two guide strips 9 are installed in the guide grooves 3. Limiting grooves adapted to the guide strips 9 are opened on both sides of the moving molds 1. The guide grooves 3 and guide strips 9 cooperate to restrict the moving molds 1 to slide only radially along the fixed mold 7, prevent the moving molds 1 from deviating, and ensure the alignment accuracy of the four moving molds 1 after alignment. The limiting grooves on both sides of the moving molds 1 and the guide strips 9 arranged in the guide grooves 3 form an interlock. When sliding, the guide strips 9 provide linear constraints, so that multiple moving molds 1 move synchronously under the drive of the mold opening structure in the guide grooves 3. When closed, they form a tight frustum-like structure under the constraint of the mold opening structure. The surface contact between the guide strips 9 and the limiting grooves improves the wear resistance.

[0037] In some technical solutions of this utility model, an oblique guide hole 2 is provided in the moving mold. The angle between the reverse extension line of the oblique guide hole 2 and the axis of the fixed mold 7 is an acute angle. An adapted oblique guide post 4 is inserted into the oblique guide hole 2. A through opening is provided on the side wall of the mounting base 6. The oblique guide post 4 is inserted through the through opening and extends outward. The oblique guide post 4 cooperates with the oblique guide hole 2. When the mold is opened, the oblique guide post 4 slides in the oblique guide hole 2, pushing the moving mold 1 to move outward. The axial component force generated by the oblique guide post 4 causes the product to gradually separate from the inner surface of the moving mold 1, reducing the risk of the product sticking to the inner surface of the moving mold 1. It also helps to avoid the obstruction caused by complex textures or undercut structures when the product is separated from the mold, and reduces the demolding resistance.

[0038] Two mounting grooves are symmetrically provided on the outer side wall of the fixed mold 7, and a split mold 10 is detachably installed in the mounting groove. When demolding the injection molded material, the split mold 10 first exits from the mounting groove, reducing the contact area between the injection mold and the fixed mold, which facilitates the subsequent demolding process.

[0039] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An injection mold that is easy to disassemble, characterized in that, The system includes a mounting base (6) and a fixed mold (7). The fixed mold (7) is mounted on the side wall of the mounting base (6). Several moving molds (1) are arranged around the outer side wall of the fixed mold (7). The moving molds (1) are arranged around the outside of the fixed mold (7) in a circumferential direction. The moving molds (1) are assembled in sequence in a frustum-like structure. The frustum-like structure has a feed port on the side away from the mounting base (6). The frustum-like structure has a main cavity. The fixed mold (7) is partially embedded in the main cavity and then closes the bottom of the main cavity. The top of the fixed mold (7) has a secondary cavity that communicates with the main cavity. The mounting base (6) is provided with a guide structure for guiding the synchronous movement of the moving molds (1).

2. The injection mold for easy disassembly according to claim 1, characterized in that, The top of the frustum-like structure is detachably provided with a sprue mold (5), a portion of which is embedded in the feed inlet, and the sprue mold (5) is connected to the main body chamber.

3. The injection mold for easy disassembly according to claim 1, characterized in that, The fixed mold (7) has an ejection channel along its axial direction, the ejection channel is connected to the auxiliary body chamber, and a guide tube structure (12) passes through the ejection channel.

4. The injection mold for easy disassembly according to claim 3, characterized in that, A cooling chamber structure (13) is provided between the outer wall of the conduit structure (12) and the inner wall of the ejection channel, and a channel structure communicating with the chamber structure (13) is provided on the outer wall of the fixed mold (7).

5. The injection mold for easy disassembly according to claim 1, characterized in that, The moving mold (1) has patterned structures on its internal surface.

6. The injection mold for easy disassembly according to claim 1, characterized in that, The outer side wall of the fixed mold (7) is fitted with a fixed seat (8), and the side wall of the mounting seat (6) is provided with an installation port that is compatible with the fixed seat (8).

7. A disassembly-friendly injection mold according to any one of claims 1-6, characterized in that, The guiding structure includes guide strips (9) corresponding to a plurality of moving molds (1). A guide groove (3) is provided on the side wall of the mounting base (6) along the radial direction of the fixed mold (7). The moving mold (1) is slidably disposed in the guide groove (3). The guide strip (9) is installed in the guide groove (3) corresponding to it. Limiting grooves adapted to the guide strip (9) are opened on both sides of the moving mold (1).

8. The injection mold for easy disassembly according to claim 7, characterized in that, The moving mold has an oblique guide hole (2). The angle between the reverse extension line of the oblique guide hole (2) and the axis of the fixed mold (7) is an acute angle. An oblique guide post (4) is inserted through the oblique guide hole (2). A through hole is opened on the side wall of the mounting base (6). The oblique guide post (4) extends outward after passing through the through hole.

9. The injection mold for easy disassembly according to claim 1, characterized in that, Two mounting slots are symmetrically provided on the outer side wall of the fixed mold (7), and a split mold (10) is detachably provided in the mounting slot.

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