A quick mold core changing mold

Abstract

The utility model discloses a kind of quick core-changing mould, it includes upper die assembly and lower die assembly, the upper die assembly includes female mould insert piece;The lower die assembly includes male mould insert piece, jacking die group and insert core assembly, the male mould insert piece, the female mould insert piece and the insert core assembly are enclosed to form the closed cavity of shaped product;The inside of male mould insert piece is provided with movable cavity, the jacking die group includes insert piece jacking plate that is movably arranged in the movable cavity, the first jacking rod that insert piece jacking plate is upward jacked in mold opening time in succession and ejects the male mould insert piece, second jacking rod is fixed on insert piece jacking plate and top end extends to the upper surface of male mould insert piece upward;In mold closing state, the jacking die group has the movable space of upward movement in the movable cavity.The utility model is designed with modular insert piece and double jacking system, realizes the quick replacement and efficient production of mould, significantly improves die-changing efficiency and product yield.

Description

Technical Field

[0001] This utility model relates to the field of molding dies, and in particular to a quick-change mold core die. Background Technology

[0002] In the field of precision injection molding, the ability to quickly change mold cores has become a key technical requirement for enabling rapid production of multiple varieties and small batches of products. Existing quick mold change solutions mostly adopt a bolt-fastened mold core insert structure. When the product and mold core need to be disassembled at the same time, the mold change process requires the disassembly of a large number of connecting parts, which is cumbersome and time-consuming.

[0003] Existing patent CN201346833Y discloses an ejection mechanism for an injection mold. This mechanism drives a lower ejector plate and an upper ejector plate via ejector pins, which in turn drive primary and secondary ejector pins for secondary ejection. Its design purpose is limited to ejecting the molded product from the mold core, completing demolding. This mechanism completely lacks the function of ejecting the mold insert itself. In the context of modern mold making, which emphasizes flexibility and rapid mold changeover, simply ejecting the product is far from sufficient. To achieve rapid mold changeover, it is necessary to be able to quickly and automatically eject the entire mold insert for replacement.

[0004] Existing patent CN202420985554.0 discloses an injection mold base for easy mold core disassembly. It uses a method of driving an ejector rod by striking the lower and upper ejector plates to knock the mold core out of the mounting slot. This is essentially a purely manual, impact-based ejection method, entirely dependent on the operator's experience and physical strength. The ejection force and direction are difficult to control precisely, posing a risk of damaging the precision mating surfaces of the mold core or even causing personal injury. This non-standardized manual operation cannot be integrated into modern automated production units, severely restricting production efficiency and contradicting the high efficiency and standardization goals of rapid mold changeovers. Furthermore, it does not provide any fast and precise mold core installation and positioning solution.

[0005] Therefore, it is necessary to design a new utility model to solve the above-mentioned technical problems. Utility Model Content

[0006] The main purpose of this utility model is to provide a quick mold core change mold. This utility model achieves quick mold replacement and efficient production through modular insert design, magnetic positioning and double lifting system, which significantly improves mold replacement efficiency and product yield.

[0007] This utility model achieves the above objectives through the following technical solution: a quick mold core changing mold, comprising: an upper mold assembly and a lower mold assembly; The upper mold assembly includes a female mold insert; The lower mold assembly includes a male mold insert, a lifting module, and a core assembly. The male mold insert, the female mold insert, and the core assembly together form a closed cavity for the molded product. The male mold insert has a movable cavity inside. The lifting module includes an insert lifting plate that is movably disposed in the movable cavity, a first lifting rod that lifts the insert lifting plate upward and ejects the male mold insert when the mold is opened, and a second lifting rod that is fixed on the insert lifting plate and extends upward to the upper surface of the male mold insert. In the mold closed state, the lifting module has an upward movement space within the movable cavity.

[0008] Furthermore, the lower mold assembly also includes a mold frame and a male mold positioning frame disposed on the mold frame for positioning the male mold insert. The male mold positioning frame is provided with a male mold positioning groove, and the male mold insert is located in the male mold positioning groove.

[0009] Furthermore, the lower surface of the male mold insert is provided with a strong magnetic component for quickly positioning and fixing the male mold insert to the mold frame.

[0010] Furthermore, the male mold positioning frame is also provided with a clip to prevent the male mold insert from moving upward with the upper mold assembly when the mold is opened; a limiting groove is provided on the side of the male mold insert near the clip, and a second limiting protrusion is provided on the clip that can extend into the limiting groove.

[0011] Furthermore, the insert assembly includes a support slide rail disposed on the mold frame, a slider horizontally slidably disposed on the support slide rail, and an insert disposed at the movable end of the slider; the end surface of the insert constitutes part of the inner wall surface of the closed cavity.

[0012] Furthermore, the slider is provided with a plug hole, and the upper mold assembly is provided with a plug-in component that is inserted into the plug hole and drives the slider to slide horizontally; the plug-in component is provided with a first driving inclined surface and a second driving inclined surface opposite to each other; the plug hole has a first guide inclined surface and a second guide inclined surface that are provided inside the first driving inclined surface and the second driving inclined surface.

[0013] Furthermore, the insert is quick-change mounted on the slider. The insert has a first through groove and a first protrusion designed to extend along the X direction. The slider has a second through groove designed to extend along the X direction for the first protrusion to be inserted into and a second protrusion for the first through groove to be inserted into.

[0014] Furthermore, the upper mold assembly also includes a flow channel system for the inflow of material and a female mold positioning frame for positioning the female mold insert.

[0015] Furthermore, the female mold positioning frame is provided with a U-shaped clearance groove for the insertion core to pass through.

[0016] Furthermore, the flow channel system includes a first flow channel plate, a second flow channel plate, and a third flow channel plate, with the first flow channel plate and the second flow channel plate connected by vertical nails.

[0017] Compared with the prior art, the advantages of this utility model of a quick-change mold core are as follows: (1) Good flow channel sealing, accurate positioning, and convenient maintenance: The automatic alignment and tight fit between the flow channel plates are achieved by the inverted conical lower end of the vertical nail and the conical surface of the mounting hole, which effectively prevents the leakage of powder metallurgy materials containing metal particles; the fit between the boss and the groove ensures the alignment accuracy of the flow channel. Compared with the traditional bolt connection, this structure does not require repeated calibration, which significantly reduces maintenance costs and time.

[0018] (2) Reliable insert positioning and fast mold change: The female mold insert achieves axial positioning through the interlocking of the first limiting protrusion and the stepped groove; the male mold insert achieves rapid adsorption and positioning with the mold frame through a strong magnetic component, and provides additional axial positioning during mold opening in combination with the hook structure of the spring clip. This positioning method, combined with magnetic fixation, realizes the second-level positioning and rapid replacement of inserts, which greatly improves the mold change efficiency and is especially suitable for small-batch, multi-variety production scenarios. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the exploded structure of this embodiment; Figure 2 This is an exploded structural diagram of the flow channel system in this embodiment; Figure 3 This is a three-dimensional structural diagram of the positioning frame for the mother mold in this embodiment; Figure 4 This is a three-dimensional structural diagram of the lower mold assembly in this embodiment; Figure 5 This is a cross-sectional view of the ferrule assembly in this embodiment; Figure 6 This is an exploded view of the ferrule assembly in this embodiment; Figure 7 This is a three-dimensional structural diagram of the lower mold assembly in this embodiment; Figure 8 This is a three-dimensional structural diagram of the male mold insert and the female mold insert in this embodiment; Figure 9 This is a partial cross-sectional structural diagram of this embodiment; The diagram is marked as follows: 100-Quick mold core change mold; 1-Upper mold assembly, 11-Runner system, 111-First runner plate, 1111-First feed hole, 112-Second runner plate, 1121-Boss, 1122-Mounting hole, 113-Third runner plate, 1131-Flow channel, 11311-Second feed hole, 1132-Groove, 114-Vertical pin, 12-Mother mold insert, 121-Feed channel, 122-First limiting protrusion, 13-Mother mold positioning frame, 131-Mother mold positioning groove, 1311-Step groove, 132-U-shaped clearance groove; 2-Lower mold assembly, 21-Mold base, 22-Male mold insert, 221-Second lifting system, 2211-Fitting pad, 2212-Second lifting rod, 2213-Ejector pin fixing plate, 2215-Limiting and leveling plate, 222-Strong magnetic assembly, 223-Limiting groove, 2231-Second limiting protrusion, 224-Moving cavity, 23-Male mold positioning frame, 231-Male mold positioning groove, 232-Clip magazine, 24-Lifting module, 241-Insert lifting plate. 242-First lifting rod, 243-Second lifting rod, 25-Insertion assembly, 251-Support slide rail, 252-Slider, 2521-Insertion hole, 25211-First guide slope, 25212-Second guide slope, 2522-Second through groove, 2523-Second protrusion, 253-Insertion piece, 2531-First drive slope, 2532-Second drive slope, 254-Insertion, 2541-First through groove, 2542-First protrusion; 3-Closed cavity. Detailed Implementation

[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0021] Please refer to Figures 1 to 9 This embodiment provides a quick-change mold core 100, which includes an upper mold assembly 1 and a lower mold assembly 2. After the two are closed, they form a closed cavity 3 for product molding. The upper mold assembly 1 includes a runner system 11, a female mold insert 12, and a female mold positioning frame 13. The runner system 11 is used to transport materials. The female mold insert 12, as one of the fixed mold forming components, is precisely positioned by the female mold positioning frame 13. The lower mold assembly 2 includes a mold frame 21, a male mold insert 22, a male mold positioning frame 23, a lifting module 24, and a core insertion assembly 25. The mold frame 21 provides basic support for the lower mold assembly 2. The male mold insert 22, the female mold insert 12, and the core insertion assembly 25 together form a closed cavity 3. The male mold positioning frame 23 is used to limit the installation position of the male mold insert 22. The lifting module 24 is used to eject the product and the insert. The core insertion assembly 25 is used to form the side structure of the product.

[0022] In the mold-closed state, the material is injected into the closed cavity 3 through the flow channel system 11. After the material cools and solidifies, the mold is opened, the upper mold assembly 1 moves upward, the lower surface of the product is attached to the surface of the male mold insert 22, and the upper surface of the product is pressed against the insert assembly 25. Then, through the lifting module 24, the product and the male mold insert 22 are separated from the mold.

[0023] The flow channel system 11 adopts a three-section plate structure, including a first flow channel plate 111, a second flow channel plate 112, and a third flow channel plate 113. The plates are precisely matched to achieve stable material delivery and rapid assembly and disassembly. Specifically, the first flow channel plate 111 and the second flow channel plate 112 are connected by vertical nails 114. The second flow channel plate 112 has corresponding mounting holes 1122 that are adapted to the vertical nails 114. The third flow channel plate 113 has several material channels 1131. The lower end of the vertical nail 114 is designed as an inverted conical structure that is narrower at the top and wider at the bottom, forming a conical surface fit with the inner wall of the mounting hole 1122. During assembly, the second flow channel plate 112 is pulled upwards. Compared with traditional bolt connections, this structure does not require repeated calibration. The second flow channel plate 112 has a downwardly extending boss 1121 at its bottom, and the upper surface of the third flow channel plate 113 has a groove 1132 that matches the size of the boss 1121. This enables the two plates to be radially and quickly positioned, ensuring the alignment accuracy of the flow channels. At the same time, after the boss 1121 is inserted into the groove 1132, the end faces of the two plates fit tightly together, forming an annular sealing area, which can effectively prevent material from overflowing from the gap between the plates.

[0024] Both the first flow channel plate 111 and the second flow channel plate 112 have a first inlet hole 1111 that runs vertically through them, serving as the main channel for material transport. One end of the flow channel 1131 is precisely aligned vertically with the first inlet hole 1111, and the other end extends to the second inlet hole 11311. The material enters the flow channel 1131 through the first inlet hole 1111, and then is injected into the feeding channel 121 of the mother mold insert 12 through the second inlet hole 11311, and finally enters the closed cavity 3.

[0025] The female mold positioning frame 13 has several female mold positioning grooves 131, and one side of each female mold positioning groove 131 has a stepped groove 1311 extending downward from the top. The upper surface of the female mold insert 12 has a first limiting protrusion 122 that matches the stepped groove 1311. During assembly, the female mold insert 12 is placed into the female mold positioning groove 131 from top to bottom, and the first limiting protrusion 122 is fastened to the stepped groove 1311 to form an axial limit, preventing the insert from detaching downward from the female mold positioning frame 13 under injection pressure.

[0026] The male mold positioning frame 23 has several corresponding male mold positioning slots 231, which are precisely aligned vertically with the female mold positioning slots 131. A strong magnetic component 222 is installed on the lower surface of the male mold insert 22. When the strong magnetic component 222 contacts the upper surface of the mold frame 21, it can instantly generate an adsorption force, realizing the rapid positioning and fixing of the male mold insert 22. Compared with the traditional mechanical bolt fixing, the mold changing efficiency is significantly improved. To prevent the upper mold assembly 1 from pulling the male mold insert 22 upward and detaching it during mold opening, a spring clip 232 is fixed on the male mold positioning frame 23. The middle part is fixed to the male mold positioning frame 23 by bolts. A limiting groove 223 is opened on the side of the male mold insert 22 near the spring clip 232. The spring clip 232 is provided with a second limiting protrusion 2321 that can extend into the limiting groove 223.

[0027] To ensure that each female mold positioning slot 131 corresponds to one male mold positioning slot 231 and one insert assembly 25, and that the quantities of all four remain consistent, this embodiment only describes one set of female mold positioning slots 131, male mold positioning slots 231, and insert assemblies 25.

[0028] A U-shaped clearance groove 132 is provided on the female mold positioning frame 13. The U-shaped clearance groove 132 extends from the side near the insert assembly 25 to the female mold positioning groove 131 along the Y direction.

[0029] The insert assembly 25 includes a support slide rail 251 disposed on the mold frame 21, a slider 252 slidably disposed on the support slide rail 251, an insert 253 inserted into the slider 252 and one end disposed on the upper mold assembly 1, and an insert 254 disposed at the movable end of the slider 252.

[0030] The connector 253 is provided with a first driving inclined surface 2531 and a second driving inclined surface 2532 opposite to each other; the slider 252 is provided with a plug hole 2521 for inserting the connector 253, and the plug hole 2521 has a first guide inclined surface 25211 and a second guide inclined surface 25212 corresponding to the first driving inclined surface 2531 and the second driving inclined surface 2532. When the mold is closed, the upper mold assembly 1 drives the insert 253 to move downward. At this time, the first driving inclined surface 2531 and the first guide inclined surface 25211 slide in contact, and the slider 252 drives the insert 254 to insert into the U-shaped relief groove 132 along the Y direction, extending into the enclosed area of ​​the female mold insert 12 and the male mold insert 22 to form part of the closed cavity 3. When the mold is opened, the upper mold assembly 1 drives the insert 253 to move upward. At this time, the second driving inclined surface 2532 and the second guide inclined surface 25212 slide against each other, and the slider 252 drives the insert 254 to disengage from the U-shaped relief groove 132 along the opposite direction of the Y axis to complete the subsequent demolding work of the product.

[0031] In this embodiment, the end surface of the insert 254 forms part of the inner wall surface of the closed cavity 3, which can form the side structure of the product. When the required side structure of the product is different, the insert 254 needs to be replaced. Therefore, in this embodiment, the insert 254 is quick-change mounted on the slider 252. Specifically, the insert 254 is provided with a first through groove 2541 and a first protrusion 2542 designed to extend through in the X direction. The slider 252 is provided with a second through groove 2522 and a second protrusion 2523 designed to extend through in the X direction at the corresponding position. During installation, the first through groove 2541 and the second protrusion 2523 are aligned, and the second through groove 2522 and the first protrusion 2542 are aligned. Then, the insert 254 is slid along the X direction so that the first protrusion 2542 is engaged in the second through groove 2522 and the second protrusion 2523 is engaged in the first through groove 2541. When removing, simply slide the insert 254 along the X direction so that the first protrusion 2542 is disengaged from the second through groove 2522 and the second protrusion 2523 is disengaged from the first through groove 2541, and it can be successfully removed and replaced.

[0032] This embodiment enables the product to detach from the mold insert 22 in two steps, satisfying the process requirements of molding, demolding, and mold changing. In addition, the mold insert 22 has an active cavity 224 for installing the lifting module 24, which can also limit the range of motion of the lifting module 24.

[0033] The lifting module 24 includes an insert lifting plate 241 that is movably disposed in the movable cavity 224, a first lifting rod 242 that lifts the insert lifting plate 241 upward during mold opening and then ejects the male mold insert 22, and a second lifting rod 243 that is fixed on the insert lifting plate 241 and extends upward to the upper surface of the male mold insert 22; and in the mold closing state, the lifting module 24 has an upward movement space in the movable cavity 224.

[0034] Ejection is performed in steps. First, the product is ejected: after the mold opens, the first lifting rod 242 pushes the insert lifting plate 241, and the insert lifting plate 241 simultaneously drives the second lifting rod 243 to move upward. The top of the second lifting rod 243 contacts the lower surface of the product, ejecting the product from the upper surface of the male mold insert 22, and the product separation is completed. Second, the male mold insert 22 is ejected: after the product is separated, the insert lifting plate 241 abuts against the top inner wall of the movable cavity 224 in the male mold insert 22. The first lifting rod 242 continues to move upward, and the insert lifting plate 241 continues to move upward until the male mold insert 22 is lifted off the male mold positioning groove 231 under the action of the lifting force. The operator can directly remove the insert for replacement. After the new insert is replaced, the lifting module 24 is reset, and the strong magnetic component 222 is re-adsorbed and fixed, completing the mold change process.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A quick-change mold core assembly, comprising an upper mold assembly and a lower mold assembly, characterized in that: The upper mold assembly includes a female mold insert; The lower mold assembly includes a male mold insert, a lifting module, and a core assembly. The male mold insert, the female mold insert, and the core assembly together form a closed cavity for the molded product. The male mold insert has a movable cavity inside. The lifting module includes an insert lifting plate that is movably disposed in the movable cavity, a first lifting rod that lifts the insert lifting plate upward and ejects the male mold insert when the mold is opened, and a second lifting rod that is fixed on the insert lifting plate and extends upward to the upper surface of the male mold insert. In the mold-closed state, the lifting module has an upward movement space within the movable cavity.

2. The quick-change mold core as described in claim 1, characterized in that: The lower mold assembly further includes a mold frame and a male mold positioning frame disposed on the mold frame for positioning the male mold insert. The male mold positioning frame is provided with a male mold positioning groove, and the male mold insert is located in the male mold positioning groove.

3. The quick-change mold core as described in claim 2, characterized in that: The lower surface of the male mold insert is provided with a strong magnetic component for quickly positioning and fixing the male mold insert to the mold frame.

4. The quick-change mold core as described in claim 2, characterized in that: The male mold positioning frame is also provided with a clip to prevent the male mold insert from moving upward with the upper mold assembly when the mold is opened; a limiting groove is provided on the side of the male mold insert near the clip, and a second limiting protrusion is provided on the clip that can extend into the limiting groove.

5. The quick-change mold core as described in claim 2, characterized in that: The insert assembly includes a support slide rail disposed on the mold frame, a slider horizontally slidably disposed on the support slide rail, and an insert disposed at the movable end of the slider; the end surface of the insert constitutes part of the inner wall surface of the closed cavity.

6. The quick-change mold core as described in claim 5, characterized in that: The slider is provided with a plug hole, and the upper mold assembly is provided with a plug-in component that is inserted into the plug hole and drives the slider to slide horizontally; the plug-in component is provided with a first driving slope and a second driving slope opposite to each other; the plug hole has a first guide slope and a second guide slope corresponding to the first driving slope and the second driving slope.

7. The quick-change mold core as described in claim 5, characterized in that: The insert is quick-change mounted on the slider. The insert has a first through groove and a first protrusion designed to extend along the X direction. The slider has a second through groove designed to extend along the X direction for the first protrusion to be inserted into and a second protrusion for the first through groove to be inserted into.

8. The quick-change mold core as described in claim 1, characterized in that: The upper mold assembly also includes a flow channel system for the inflow of material and a female mold positioning frame for positioning the female mold insert.

9. The quick-change mold core as described in claim 8, characterized in that: The female mold positioning frame is provided with a U-shaped clearance groove for the insertion core to pass through.

10. The quick-change mold core as described in claim 8, characterized in that: The flow channel system includes a first flow channel plate, a second flow channel plate, and a third flow channel plate, with the first flow channel plate and the second flow channel plate connected by vertical nails.

Images