A mold with a local pressure device

Abstract

The utility model discloses a kind of mould with partial pressurizing device, including fixed mould and movable mould, the fixed mould and movable mould are all including mould body, each the mould body side surface is all equipped with mould cavity, each the mould body inside is all equipped with installation cavity, each the mould cavity corresponding need pressurizing portion inner wall is all equipped with modular installation groove, the modular installation groove is detachably connected with modular pressurizing component, by modular design, partial pressurizing component and mould body are realized detachable integration by modular installation groove, clamping structure and quick release connection, without disassembling entire mould, modular pressurizing component can be individually disassembled, maintained and replaced, simplify operation process, shorten maintenance time, reduce the precision loss risk caused by frequent disassembly mould, also improve the versatility and production flexibility of mould, reduce the equipment investment cost when multi-species production, avoid the problem that traditional integrated partial pressurizing mould is inconvenient to maintain, poor adaptability.

Description

Technical Field

[0001] This utility model relates to the field of molds, and more specifically, to a mold with a local pressure device. Background Technology

[0002] Currently, in molds with localized pressurization functions, the integration of the localized pressurization device with the mold body is generally high, often consisting of a rigid connection or a one-piece molding structure. When the localized pressurization device wears out or malfunctions and needs replacement or maintenance, it is often necessary to disassemble the entire mold (including the main structures of the fixed mold and the moving mold). This not only involves cumbersome and time-consuming procedures but may also damage the mold's precision due to frequent disassembly, increasing maintenance costs. At the same time, for aluminum alloy die-casting parts produced in multiple varieties and small batches, the localized pressurization positions and structures of different products vary. Traditional integrated structures are difficult to adapt quickly to different needs, requiring the redesign or modification of the entire mold, which limits production flexibility and efficiency and cannot meet the requirements of convenient equipment maintenance and product adaptability in modern production.

[0003] How to invent a mold with a local pressure device to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a mold with a local pressure device, which aims to improve the problems of high integration between the local pressure device and the mold body, the need to disassemble the entire mold for maintenance and replacement, which leads to cumbersome operation, time consumption, damage to precision, increased costs, and difficulty in quickly adapting to the production of various types of aluminum alloy die castings, thus limiting flexibility and efficiency.

[0005] This utility model is implemented as follows: A mold with a local pressure device includes a fixed mold and a moving mold. Both the fixed mold and the moving mold include mold bodies. Each mold body has a mold cavity on one side surface and an installation cavity inside. Each mold cavity has a modular installation groove on the inner wall corresponding to the part to be pressured. A modular pressure assembly is detachably connected to the modular installation groove. A guide limiting tube communicating with the installation cavity is provided on one side inner wall of the modular installation groove. The modular pressure assembly includes a sealing positioning cover plate. The sealing positioning cover plate is detachably connected to the modular installation groove through a snap-fit ​​structure. A docking hole coaxially arranged with the guide limiting tube is opened on the surface of the sealing positioning cover plate. A pressure head is inserted into the docking hole. The pressure head is slidably connected to the guide limiting tube and connected to a driving device through a double-limit quick-release structure at its end. The driving device is fixedly installed on one side inner wall of the installation cavity.

[0006] In a preferred embodiment of this utility model, the pressure head has an insertion hole at one end facing the modular mounting groove, and a rod is inserted into the insertion hole. The rod is fixedly connected to the end of the piston rod of the driving device. The pressure head and the rod are respectively provided with a radial limiting structure and an axial limiting structure.

[0007] In a preferred embodiment of this utility model, the radial limiting structure includes a radial limiting slide bar integrally disposed on the inner wall of one side of the guide limiting tube and a radial limiting groove formed on the outer wall of one side of the pressure head, wherein the radial limiting slide bar and the radial limiting groove are slidably engaged.

[0008] In a preferred embodiment of this utility model, the axial limiting structure includes a locking block integrally disposed on the outer walls of both sides of the insertion rod end and an insertion groove formed on the inner walls of both sides of the insertion hole. Each insertion groove has an axial limiting locking groove formed at one end inside the insertion hole. The cross-sectional shape of each locking block is consistent with the cross-sectional shape of the insertion groove and slides with the insertion groove. The structure and size of each axial limiting groove are consistent with the locking block.

[0009] In a preferred embodiment of this utility model, the snap-fit ​​structure includes a plurality of positioning slots formed on the bottom surface of the modular mounting groove and a plurality of snap plates integrally formed on the bottom surface of the sealing positioning cover. The number and position of the plurality of positioning slots and snap plates are all one-to-one. Each snap plate is inserted into the corresponding positioning slot. The top surface of the sealing positioning cover is also provided with a plurality of connecting screw holes. The side surface of the mold body is provided with a plurality of limiting holes, the number and position of which correspond one-to-one with the connecting screw holes. Each limiting hole is fitted with a fixing bolt, and one end of each fixing bolt is threaded into the corresponding connecting screw hole.

[0010] In a preferred embodiment of this utility model, a contact plate is integrally provided at the end of the pressure head away from the insertion hole, and the surface structure of the contact plate facing the mold cavity corresponds to the overall structure of the inner wall of the mold cavity.

[0011] In a preferred embodiment of this utility model, the sealing and positioning cover plate has a receiving groove corresponding to the contact plate on the side surface facing the inside of the mold cavity.

[0012] The beneficial effects of this utility model are as follows: The mold with a local pressure device obtained by the above design can be detachably integrated with the mold body through modular design by means of modular mounting slots, snap-fit ​​structures and quick-release connections. The modular pressure component can be disassembled, maintained and replaced separately without disassembling the entire mold, which simplifies the operation process, shortens the maintenance time, reduces the risk of precision loss caused by frequent mold disassembly, improves the versatility and production flexibility of the mold, reduces the equipment investment cost when producing multiple varieties, and avoids the problems of inconvenient maintenance and poor adaptability of traditional integrated local pressure molds. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional schematic diagram of the overall structure provided by the embodiment of this utility model; Figure 2 A three-dimensional schematic cross-sectional view of the overall structure of the mold provided for an embodiment of this utility model; Figure 3 A schematic perspective view of the overall cross-sectional structure of the mold body provided for an embodiment of this utility model; Figure 4 A schematic perspective view of the overall cross-sectional structure of the sealing and positioning cover plate provided for an embodiment of this utility model; Figure 5 A schematic perspective view of the overall connection structure of the pressure head and insertion rod provided for an embodiment of this utility model; Figure 6 A three-dimensional schematic cross-sectional view of the pressure head provided for an embodiment of this utility model; Figure 7 A three-dimensional cross-sectional view of the overall locked state of the pressure head and insertion rod provided for the embodiment of this utility model.

[0015] In the diagram: 1-Mold body; 2-Modular pressurizing assembly; 3-Drive device; 101-Mold cavity; 102-Mounting cavity; 103-Modular mounting groove; 105-Guide limiting tube; 106-Radial limiting slide bar; 107-Positioning slot; 108-Limiting hole; 201-Sealing positioning cover plate; 202-Docking hole; 203-Pressure head; 204-Insertion hole; 205-Insertion rod; 206-Clamping block; 207-Insertion groove; 208-Axial limiting groove; 209-Radial limiting groove; 210-Contact plate; 211-Clamping plate; 212-Connecting screw hole; 213-Fixing bolt. Detailed Implementation

[0016] 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] Please see Figures 1 to 7 This utility model provides a technical solution: a mold with a local pressure device, including a fixed mold and a moving mold, both of which include a mold body 1. Each mold body 1 has a mold cavity 101 on one side surface and an installation cavity 102 inside. Each mold cavity 101 has a modular installation groove 103 on the inner wall corresponding to the part to be pressured. The modular installation groove 103 is detachably connected to a modular pressure assembly 2. A guide limiting tube communicating with the installation cavity 102 is provided on the inner wall of one side of the modular installation groove 103. 105. The modular pressurizing assembly 2 includes a sealing and positioning cover plate 201. The sealing and positioning cover plate 201 is detachably connected to the modular mounting groove 103 via a snap-fit ​​structure. The surface of the sealing and positioning cover plate 201 is provided with a docking hole 202 coaxially arranged with the guide limiting tube 105. A pressurizing head 203 is inserted into the docking hole 202. The pressurizing head 203 is slidably connected to the guide limiting tube 105 and connected to the driving device 3 through a double-limit quick-release structure at its end. The driving device 3 is fixedly installed on the inner wall of one side of the mounting cavity 102.

[0018] The mold cavity 101 is precision machined according to the three-dimensional model of the casting to be formed to ensure the contour accuracy; the dimensions of the mounting cavity 102 are designed according to the specifications of the drive device 3, with sufficient space reserved for the fixation and maintenance of the drive device 3; the depth and width of the modular mounting groove 103 are adapted to the modular pressurizing component 2, and its inner wall is polished to reduce assembly resistance; the guide limit tube 105 is made of wear-resistant alloy, and its inner wall is smooth to reduce friction when the pressurizing head 203 slides; the drive device 3 can be selected as a hydraulic cylinder or electric push rod according to actual needs, and is fixed to the mounting seat preset on the inner wall of the mounting cavity 102 by bolts; the modular pressurizing component 2 is assembled with the modular mounting groove 103 through a snap-fit ​​structure, and the overall disassembly and assembly process does not require disassembly of other parts of the fixed mold or moving mold, and can be operated by a single person.

[0019] Please see Figures 2 to 7 The pressure head 203 has an insertion hole 204 at one end facing the modular mounting groove 103. An insertion rod 205 is inserted into the insertion hole 204. The insertion rod 205 is fixedly connected to the end of the piston rod of the drive device 3. The pressure head 203 and the insertion rod 205 are respectively provided with a radial limiting structure and an axial limiting structure.

[0020] The inner wall of the insertion hole 204 is honed to reduce friction with the insertion rod 205. The insertion rod 205 is made of high-strength alloy steel, and the radial limiting structure maintains a proper fit when the pressure head 203 slides, preventing relative rotation between the pressure head 203 and the insertion rod 205. The axial limiting structure can reliably withstand axial force when the driving device 3 drives the pressure head 203 to extend or retract, preventing the pressure head 203 from disengaging from the insertion rod 205. In practical applications, the extension and retraction stroke of the driving device 3 is set according to the local pressure requirements of the casting, ensuring that the pressure head 203 can accurately act on the target area.

[0021] Furthermore, the radial limiting structure includes a radial limiting slide 106 integrally disposed on the inner wall of one side of the guide limiting tube 105 and a radial limiting slide groove 209 opened on the outer wall of one side of the pressure head 203, wherein the radial limiting slide 106 and the radial limiting slide groove 209 are in sliding engagement.

[0022] The radial limiting slide 106 and the guide limiting tube 105 are integrally formed. The depth and width of the radial limiting slide groove 209 are 0.02-0.05mm larger than those of the radial limiting slide 106 to ensure smooth sliding without radial wobble. During assembly, the alignment error between the radial limiting slide 106 and the radial limiting slide groove 209 is controlled within 0.1mm to ensure that the pressure head 203 is radially constrained throughout the entire stroke, avoiding pressure position deviation caused by rotation.

[0023] Furthermore, the axial limiting structure includes a locking block 206 integrally disposed on the outer walls of both sides of the end of the insertion rod 205 and an insertion groove 207 opened on the inner walls of both sides of the insertion hole 204. Each insertion groove 207 has an axial limiting groove 208 opened on one side inside the insertion hole 204. The cross-sectional shape of each locking block 206 is consistent with the cross-sectional shape of the insertion groove 207 and slides with the insertion groove 207. The structure and size of each axial limiting groove 208 are consistent with those of the locking block 206.

[0024] The end of the locking block 206 is rounded to facilitate insertion into the slide groove 207. The length of the slide groove 207 is 5-10mm longer than the locking block 206 to ensure that the locking block 206 can be fully inserted. The axial limiting groove 208 extends circumferentially along the inner wall of the insertion hole 204, with a length matching the locking block 206 and a depth deeper than the slide groove 207, forming an axial step to achieve limiting. In actual operation, after the locking block 206 is inserted along the slide groove 207, rotating the pressure head 203 will allow the locking block 206 to enter the axial limiting groove 208, and axial fixation can be completed without tools. When disassembling, rotating in the opposite direction will separate the locking block.

[0025] Furthermore, the snap-fit ​​structure includes several positioning slots 107 formed on the bottom surface of the modular mounting groove 103 and several snap plates 211 integrally formed on the bottom surface of the sealing positioning cover 201. The number and position of the positioning slots 107 and snap plates 211 are all one-to-one. Each snap plate 211 is inserted into the corresponding positioning slot 107. The top surface of the sealing positioning cover 201 is also provided with several connecting screw holes 212. The side surface of the mold body 1 is provided with several limiting holes 108, the number and position of which correspond to the connecting screw holes 212. Each limiting hole 108 is fitted with a fixing bolt 213, and one end of each fixing bolt 213 is threaded into the corresponding connecting screw hole 212.

[0026] The positioning slot 107 has a depth of 5-10mm and its inner wall is deburred. The thickness of the plate 211 is 0.05-0.1mm smaller than that of the positioning slot 107. An intermediate fit is used to ensure accurate positioning and easy insertion and removal. The length of the fixing bolt 213 should be 2 / 3 of the depth of the connecting screw hole 212 to avoid excessive length touching the modular mounting groove 103. During assembly, after the plate 211 is inserted into the positioning slot 107, the gap between the sealing positioning cover 201 and the modular mounting groove 103 is ≤0.03mm to ensure sealing.

[0027] Furthermore, the end of the pressure head 203 away from the insertion hole 204 is also integrally provided with a contact plate 210, and the surface structure of the contact plate 210 facing the mold cavity 101 corresponds to the overall structure of the inner wall of the mold cavity 101.

[0028] The contact plate 210 and the pressure head 203 are formed by integrated forging process and are made of cemented carbide. The surface of the contact plate 210 facing the mold cavity 101 is machined according to the three-dimensional contour of the area to be pressurized on the inner wall of the mold cavity 101 to ensure seamless fit with the inner wall of the mold cavity 101. When the pressure head 203 is in the initial position, the flatness error between the surface of the contact plate 210 and the inner wall of the mold cavity 101 is ≤0.02mm to avoid marks on the surface of the casting. When pressurizing, the pressure of the contact plate 210 is adjusted by the drive device 3 to ensure that the local density of the casting meets the standard.

[0029] Furthermore, the sealing and positioning cover plate 201 has a receiving groove on the side surface facing the inside of the mold cavity 101 that corresponds to the contact plate 210.

[0030] The depth of the receiving groove is consistent with the thickness of the contact plate 210. The fitting gap between the receiving groove and the contact plate 210 is controlled at 0.02-0.03mm to ensure that the contact plate 210 can be fully embedded when it retracts without significant shaking. The edges of the receiving groove are rounded to avoid forming sharp angles with the contact plate 210, which would cause stress concentration. In practical applications, after the contact plate 210 is embedded in the receiving groove, its surface is flush with the surface of the sealing positioning cover plate 201 facing the mold cavity 101, together forming a complete inner wall of the cavity, ensuring the quality of the casting.

[0031] Working principle: First, connect the pressure head 203 to the drive device 3. Because the pressure head 203 cannot rotate when it is in the guide limiting tube 105 due to the cooperation between the radial limiting slide bar 106 and the radial limiting groove 209, the drive device 3 must be started first during connection. This allows its piston rod to drive the insertion rod 205 to extend out of the docking hole 202 and into the mold cavity 101. At this time, the pressure head 203 has not entered the guide limiting tube 105 and can rotate freely. Align the insertion hole 204 of the pressure head 203 with the insertion rod 205, causing the locking block 20... Insert the rod 205 along the insertion groove 207. After it is in place, rotate the pressure head 203 so that the locking block 206 screws into the axial limiting groove 208 to complete the axial limiting. At this time, the angle of the pressure head 203 ensures that the radial limiting groove 209 corresponds to the radial limiting slide bar 106. Then, the piston rod of the drive device 3 retracts, driving the pressure head 203 into the guide limiting tube 105. The radial limiting slide bar 106 slides with the radial limiting groove 209 to limit the radial rotation of the pressure head 203, completing the overall limiting. When the pressure head 203 is not fully extended out of the docking hole 202, the insertion rod 205 and the pressure head 203 are stably connected through the cooperation of the locking block 206 and the axial limiting groove 208, ensuring that the position of the pressure head 203 is without deviation. When localized pressurization is required, the drive device 3 pushes the pressurizing head 203 to extend along the guide limiting tube 105, and the contact plate 210 at its end applies localized pressure to the casting in the mold cavity 101. After the pressure is maintained, the pressurizing head 203 retracts, and the contact plate 210 is embedded in the receiving groove of the sealing positioning cover plate 201, flush with the inner wall of the mold cavity 101. The modular pressurizing assembly 2 is pre-positioned by the clamping plate 211 of the sealing positioning cover plate 201 and the positioning slot 107 of the modular mounting groove 103, and then fixed by the fixing bolts 213. If maintenance is required, the assembly can be removed individually by simply removing the bolts and separating the pressurizing head 203 from the insertion rod 205, without disassembling the entire mold. This ensures the accuracy of localized pressurization and achieves modular disassembly and stable operation.

[0032] It should be noted that the specific model and specifications of the drive device 3 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0033] The power supply and principle of the drive device 3 are clear to those skilled in the art and will not be described in detail here.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the 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. A mold with a local pressure device, comprising a fixed mold and a movable mold, wherein both the fixed mold and the movable mold include mold bodies, and each mold body has a mold cavity on one side surface, characterized in that, Each mold body has an internal mounting cavity, and each mold cavity has a modular mounting groove on the inner wall of the part to be pressurized. The modular mounting groove is detachably connected to a modular pressurizing component. A guide limiting tube communicating with the mounting cavity is provided on one side of the inner wall of the modular mounting groove. The modular pressurizing component includes a sealing positioning cover plate, which is detachably connected to the modular mounting groove through a snap-fit ​​structure. A docking hole coaxially arranged with the guide limiting tube is provided on the surface of the sealing positioning cover plate. A pressurizing head is inserted into the docking hole. The pressurizing head is slidably connected to the guide limiting tube and connected to the driving device through a double-limit quick-release structure at its end. The driving device is fixedly installed on one side of the inner wall of the mounting cavity.

2. The mold with a local pressure device as described in claim 1, characterized in that: The pressure head has an insertion hole at one end facing the modular mounting slot, and a rod is inserted into the insertion hole. The rod is fixedly connected to the end of the piston rod of the drive device. The pressure head and the rod are respectively provided with a radial limiting structure and an axial limiting structure.

3. The mold with a local pressure device as described in claim 2, characterized in that: The radial limiting structure includes a radial limiting slide bar integrally disposed on the inner wall of one side of the guide limiting tube and a radial limiting slide groove opened on the outer wall of one side of the pressure head, wherein the radial limiting slide bar and the radial limiting slide groove are slidably engaged.

4. The mold with a local pressure device as described in claim 2, characterized in that: The axial limiting structure includes a locking block integrally disposed on the outer wall of both sides of the insertion rod end and an insertion groove opened on the inner wall of both sides of the insertion hole. Each insertion groove is connected to one side with an axial limiting locking groove at one end inside the insertion hole. The cross-sectional shape of each locking block is consistent with the cross-sectional shape of the insertion groove and slides with the insertion groove. The structure and size of each axial limiting groove are consistent with the locking block.

5. The mold with a local pressure device as described in claim 1, characterized in that: The snap-fit ​​structure includes several positioning slots formed on the bottom surface of the modular mounting groove and several snap-fit ​​plates integrally formed on the bottom surface of the sealing positioning cover. The number and position of the positioning slots and snap-fit ​​plates are all one-to-one. Each snap-fit ​​plate is inserted into the corresponding positioning slot. The top surface of the sealing positioning cover is also provided with several connecting screw holes. The side surface of the mold body is provided with several limiting holes, the number and position of which correspond one-to-one with the connecting screw holes. Each limiting hole is fitted with a fixing bolt, and one end of each fixing bolt is threaded into the corresponding connecting screw hole.

6. The mold with a local pressure device as described in claim 1, characterized in that: The end of the pressure head away from the insertion hole is also integrally provided with a contact plate, and the surface structure of the contact plate facing the mold cavity corresponds to the overall structure of the inner wall of the mold cavity.

7. The mold with a local pressure device as described in claim 1, characterized in that: The sealing and positioning cover plate has a receiving groove on the side surface facing the inside of the mold cavity that corresponds to the contact plate.

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