Die changing mechanism for MIM part machining

Abstract

The utility model relates to the technical field of die changing mechanisms, in particular to a die changing mechanism for MIM part machining, which comprises a die box, an L-shaped plate, a movable sliding block and an electric lead screw, the L-shaped plate is fixedly arranged at one end of an opening of the die box, the movable sliding block is slidably mounted in the die box through the electric lead screw, and the electric lead screw is mounted in the die box. The lower die replacing and positioning device comprises a mounting plate, positioning sliding blocks, limiting blocks, first telescopic pieces and second telescopic pieces, the mounting plate is fixedly connected with the movable sliding blocks, the positioning sliding blocks are slidably connected with the mounting plate and mounted on the four edges of the mounting plate, and the limiting blocks are fixedly connected with the positioning sliding blocks; and the first telescopic pieces are connected with the mounting plate and mounted on the two opposite sides of the mounting plate, and the second telescopic pieces are mounted on the other two opposite sides of the mounting plate, so that the effects that the lower die is more rapidly replaced, positioned and mounted, and the machining efficiency is improved are achieved.

Description

Technical Field

[0001] This utility model relates to the field of mold changing mechanism technology, and in particular to a mold changing mechanism for machining MIM parts. Background Technology

[0002] MIM (Metal Injection Molding) is a molding method that involves injecting a plasticized mixture of metal powder and its binder into a mold. MIM product injection first mixes the selected powder and binder, then connects the mold mounting platform to the injection molding machine for processing. The mixture is then granulated and injected into the desired shape. During the actual processing, the mold needs to be changed at some point. The connection between the mold mounting platform and the injection molding machine makes it inconvenient to change between different molds, thus reducing mold changeover efficiency.

[0003] The prior art CN221773505U discloses a mold changing mechanism for MIM part processing, including a worktable. A mold box is fixedly installed on the top of one side of the worktable, and an L-shaped plate is fixedly installed on the top of the worktable near the mold box. A first sliding groove is opened at the bottom of the mold box, and a second sliding groove is opened at the top of the L-shaped plate. The first sliding groove and the second sliding groove are connected. By threading the threaded rod to the slot position of the bottom of the lower mold of different sizes into one of the threaded holes of a plurality of symmetrical threaded holes on the corresponding partition plate, it is convenient to clamp the lower mold of different sizes onto the partition plate, thereby better stabilizing the lower mold on the partition plate. This ensures the overall stability of the mold while reducing the difficulty of operation and improving the efficiency of workers in changing lower molds of different sizes.

[0004] However, the connection between the lower mold and the partition plate in the above technologies is complicated, and each of them requires a slot to be set at the bottom of the lower mold, and the installation, disassembly and replacement are relatively complicated. Utility Model Content

[0005] The purpose of this utility model is to provide a mold changing mechanism for processing MIM parts, which solves the problems of the cumbersome connection method between the lower mold and the partition in the prior art, the need to set a slot at the bottom of different lower molds, and the cumbersome installation, disassembly and replacement.

[0006] To achieve the above objectives, this utility model provides a mold changing mechanism for MIM part processing, including a mold box, an L-shaped plate, a movable slider, and an electric lead screw. The L-shaped plate is fixedly mounted at one open end of the mold box, and the movable slider is slidably mounted inside the mold box via the electric lead screw.

[0007] It also includes a lower mold changing and positioning device;

[0008] The lower mold changing and positioning device includes a mounting plate, a positioning slider, a limiting block, a first telescopic member, and a second telescopic member. The mounting plate is fixedly connected to the moving slider and is located on top of the moving slider. The positioning slider is slidably connected to the mounting plate and is installed on the four sides of the mounting plate. The limiting block is fixedly connected to the positioning slider and is located on opposite sides of the positioning slider. The first telescopic member is connected to the mounting plate and is installed on opposite sides of the mounting plate. The second telescopic member is installed on the other opposite sides of the mounting plate.

[0009] The first telescopic component includes a first fixed cylinder, a first connecting rod, and a first telescopic spring. The first fixed cylinder is fixedly connected to the mounting plate and is located on both sides of the mounting plate. One end of the first connecting rod is slidably connected to the first fixed cylinder, and the other end of the first connecting rod is fixedly connected to the positioning slider. The first telescopic spring is installed inside the first fixed cylinder, and one end of the first telescopic spring is fixedly connected to the first connecting rod.

[0010] The second telescopic component includes a second fixed cylinder, a second connecting rod, and a second telescopic spring. The second fixed cylinder is fixedly connected to the mounting plate and is located on the other two sides of the mounting plate. One end of the second connecting rod is slidably connected to the second fixed cylinder, and the other end of the second connecting rod is fixedly connected to the positioning slider. The second telescopic spring is installed inside the second fixed cylinder, and one end of the second telescopic spring is fixedly connected to the second connecting rod.

[0011] The mounting plate has a short limiting groove and a long limiting groove. The short limiting groove is located on opposite sides of the mounting plate and cooperates with the positioning slider and the limiting block. The long limiting groove is located on the other opposite sides of the mounting plate and cooperates with the positioning slider and the limiting block.

[0012] The mounting plate also has a first fixing hole and a second fixing hole, wherein the first fixing hole cooperates with the first fixing cylinder; and the second fixing hole cooperates with the second fixing cylinder.

[0013] This utility model discloses a mold changing mechanism for MIM part processing. The lower mold changing and positioning device is driven by an electric screw to move the movable slider to the L-shaped plate position, pushing one or two of the positioning sliders. The first and second telescopic members extend, forcefully clamping the lower mold between the four positioning sliders until the bottom of the lower mold abuts against the top of the mounting plate. The elastic extension force of the first and second telescopic members causes the positioning sliders to press against the four sides of the outer wall of the lower mold, thereby achieving clamping and positioning of the lower mold. When changing the lower mold, simply pull it upwards to replace it with the next lower mold. Therefore, the lower mold changing and positioning device enables faster replacement and installation of the lower mold, improving processing efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the structure of a mold changing mechanism for machining MIM parts according to this utility model.

[0016] Figure 2 This is a schematic diagram of the lower mold changing and positioning device of this utility model.

[0017] Figure 3 This is a top view of the lower mold changing and positioning device of this utility model.

[0018] In the diagram: 101-Mold box, 102-L-shaped plate, 103-Moving slider, 104-Electric lead screw, 105-Mounting plate, 106-Positioning slider, 107-Limiting block, 108-First fixed cylinder, 109-First connecting rod, 110-First telescopic spring, 111-Second fixed cylinder, 112-Second connecting rod, 113-Second telescopic spring, 114-Short limiting groove, 115-Long limiting groove, 116-First fixing hole, 117-Second fixing hole. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Please see Figures 1 to 3 ,in Figure 1 This is a schematic diagram of the structure of a mold changing mechanism for machining MIM parts according to this utility model. Figure 2 This is a structural schematic diagram of the lower mold changing and positioning device of this utility model. Figure 3This is a top view of the lower mold changing and positioning device of this utility model.

[0021] This utility model discloses a mold changing mechanism for MIM part processing, comprising a mold box 101, an L-shaped plate 102, a movable slider 103, an electric lead screw 104, and a lower mold changing and positioning device. The lower mold changing and positioning device includes a mounting plate 105, a positioning slider 106, a limiting block 107, a first telescopic component, and a second telescopic component. The first telescopic component includes a first fixed cylinder 108, a first connecting rod 109, and a first telescopic spring 110. The second telescopic component includes a second fixed cylinder 111, a second connecting rod 112, and a second telescopic spring 113. The mounting plate 105 has a short limiting groove 114 and a long limiting groove 115, and also has a first fixing hole 116 and a second fixing hole 117. This solution solves the problems of cumbersome connection methods between the lower mold and the partition in the prior art, which require slots to be set at the bottom of different lower molds, and cumbersome installation and disassembly. It is understood that the aforementioned solution can quickly change and position the lower mold using the lower mold changing and positioning device, improving processing efficiency.

[0022] In this embodiment, the L-shaped plate 102 is fixedly provided at one end of the opening of the mold box 101, and the movable slider 103 is slidably installed in the mold box 101 through the electric lead screw 104, which is installed in the mold box 101. The mold box 101 is used to install the movable slider 103, the electric lead screw 104, and the lower mold replacement and positioning device. The top of the mold box 101 has an opening for connecting to an external extrusion tube, allowing raw materials to enter the syringe of the upper mold through a metal hose. The upper mold, which is installed at the top of the inner cavity of the mold box 101 by an electric telescopic rod, moves downward to coincide with the lower mold. Injection processing is performed in the cavity formed by the upper and lower molds through the syringe, thereby realizing the injection processing of MIM parts. The lower mold is installed and positioned by the lower mold replacement and positioning device, and the movable slider 103 is driven by the rotation of the electric lead screw 104 to slide horizontally in the mold box 101, moving the movable slider 103 to the position of the L-shaped plate 102 for lower mold replacement. After replacement, the electric lead screw 104 is rotated in the opposite direction to move the movable slider 103 into the mold box 101, aligning the replaced lower mold on the lower mold replacement and positioning device with the upper mold, and then processing is performed.

[0023] The mounting plate 105 is fixedly connected to the movable slider 103 and located on top of the movable slider 103. The positioning slider 106 is slidably connected to the mounting plate 105 and installed on the four sides of the mounting plate 105. The limiting block 107 is fixedly connected to the positioning slider 106 and located on opposite sides of the positioning slider 106. The first telescopic member is connected to the mounting plate 105 and installed on opposite sides of the mounting plate 105. The second telescopic member is installed on the other opposite sides of the mounting plate 105. The short limiting groove 114 is provided on opposite sides of the mounting plate 105 and cooperates with the positioning slider 106 and the limiting block 107. The long limiting groove 115 is provided on the other opposite sides of the mounting plate 105 and cooperates with the positioning slider 106 and the limiting block 107. The first fixing hole 116 cooperates with the first fixing cylinder 108. The second fixing hole 117 cooperates with the second fixing cylinder 111.The mounting plate 105 is fixedly mounted on the top of the movable slider 103. The mounting plate 105 has short limiting grooves 114 and long limiting grooves 115 with upward openings at the center of each of its four sides. The two short limiting grooves 114 are located on opposite sides of the longer portion of the mounting plate 105, and the two long limiting grooves 115 are located on opposite sides of the shorter portion of the mounting plate 105. The width of both the short limiting grooves 114 and the long limiting grooves 115 matches the width of the positioning slider 106, and the length of the short limiting groove 114 is less than the width of the movable slider 103. The long limiting groove 115 and the short limiting groove 114 are both symmetrically provided with sliding grooves that cooperate with the limiting block 107, which are used to limit the sliding passage of the positioning slider 106 and the limiting block 107. The first telescopic member is installed in each of the two short limiting grooves 114, and the mounting plate 105 is provided with the first fixing hole 116 communicating with the short limiting groove 114 for installing the first telescopic member. The sliding connection of the positioning slider 106 is realized through the first telescopic member. The second telescopic component is installed in the mounting plate 105, and the mounting plate 105 is provided with the second fixing hole 117 communicating with the long limiting groove 115 for installing the second telescopic component. The second telescopic component connects to the other two positioning sliders 106. The positioning sliders 106 are slidably positioned by the first telescopic component and the second telescopic component. Therefore, the lower mold changing positioning device drives the moving slider 103 to the position of the L-shaped plate 102 by the electric screw 104, pushing one or two positioning sliders 106. The first telescopic component and the second telescopic component extend, forcefully clamping the lower mold between the four positioning sliders 106 until the bottom of the lower mold abuts against the top of the mounting plate 105. The elastic telescopic force of the first telescopic component and the second telescopic component drives the positioning sliders 106 to press against the four sides of the outer wall of the lower mold, thereby achieving clamping and positioning of the lower mold. When changing the lower mold, it is only necessary to pull the lower mold upward and replace it with the next lower mold. Thus, the lower mold changing positioning device can achieve faster replacement and positioning of the lower mold, improving processing efficiency.

[0024] Secondly, the first fixing cylinder 108 is fixedly connected to the mounting plate 105 and located on both sides of the mounting plate 105; one end of the first connecting rod 109 is slidably connected to the first fixing cylinder 108, and the other end of the first connecting rod 109 is fixedly connected to the positioning slider 106; the first telescopic spring 110 is installed inside the first fixing cylinder 108, and one end of the first telescopic spring 110 is fixedly connected to the first connecting rod 109. The first fixing cylinder 108 is fixedly installed inside the matching first fixing hole 116, the inner cavity of the first fixing cylinder 108 is adapted to the insertion end of the first connecting rod 109, and the first telescopic spring 110 is fixedly provided in the inner cavity of the first fixing cylinder 108. The first telescopic spring 110 is fixedly connected to the first connecting rod 109. The elastic extension and contraction of the first telescopic spring 110 drives the first connecting rod 109 to move horizontally, thereby driving the positioning slider 106 fixedly connected to the first connecting rod 109 to move.

[0025] Meanwhile, the second fixing cylinder 111 is fixedly connected to the mounting plate 105 and located on the other two sides of the mounting plate 105; one end of the second connecting rod 112 is slidably connected to the second fixing cylinder 111, and the other end of the second connecting rod 112 is fixedly connected to the positioning slider 106; the second telescopic spring 113 is installed inside the second fixing cylinder 111, and one end of the second telescopic spring 113 is fixedly connected to the second connecting rod 112. The second fixing cylinder 111 is fixedly installed inside the matching second fixing hole 117. The inner cavity of the second fixing cylinder 111 is adapted to the extension end of the second connecting rod 112, and the inner cavity of the second fixing cylinder 111 is fixedly provided with the second telescopic spring 113. The second telescopic spring 113 is fixedly connected to the second connecting rod 112. The elastic extension and contraction of the second telescopic spring 113 drives the second connecting rod 112 to move horizontally, thereby driving the positioning slider 106 fixedly connected to the second connecting rod 112 to move.

[0026] When using the mold changing mechanism for MIM part processing according to this utility model, the lower mold changing and positioning device drives the movable slider 103 to the position of the L-shaped plate 102 via the electric lead screw 104, pushing one or two of the positioning sliders 106. The first telescopic member and the second telescopic member extend, forcefully clamping the lower mold between the four positioning sliders 106 until the bottom of the lower mold abuts against the top of the mounting plate 105. The elastic telescopic force of the first telescopic member and the second telescopic member drives the positioning sliders 106 to press against the four sides of the outer side wall of the lower mold, thereby achieving clamping and positioning of the lower mold. When changing the lower mold, it is only necessary to pull the lower mold upward and replace it with the next lower mold. Thus, the lower mold changing and positioning device enables faster replacement and installation of the lower mold, improving processing efficiency.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A die changing mechanism for MIM part processing, comprising a die box, an L-shaped plate, a moving slider and an electric screw rod, the L-shaped plate is fixedly arranged at the opening end of the die box, the moving slider is slidingly arranged in the die box through the electric screw rod, and the electric screw rod is arranged in the die box, characterized in that, it further comprises a lower die replacement positioning device; the lower die replacement positioning device comprises a mounting plate, a positioning slider, a limiting block, a first telescopic member and a second telescopic member, the mounting plate is fixedly connected with the moving slider and located at the top of the moving slider, the positioning slider is slidingly connected with the mounting plate and arranged at four edges of the mounting plate, the limiting block is fixedly connected with the positioning slider and located at opposite sides of the positioning slider, the first telescopic member is connected with the mounting plate and arranged at opposite sides of the mounting plate, and the second telescopic member is arranged at opposite other sides of the mounting plate.

2. The die changing mechanism for MIM part processing according to claim 1, characterized in that, the first telescopic member comprises a first fixed cylinder, a first connecting rod and a first telescopic spring, the first fixed cylinder is fixedly connected with the mounting plate and located at two sides of the mounting plate, one end of the first connecting rod is slidingly connected with the first fixed cylinder, the other end of the first connecting rod is fixedly connected with the positioning slider, and the first telescopic spring is arranged in the first fixed cylinder and one end of the first telescopic spring is fixedly connected with the first connecting rod.

3. The die changing mechanism for MIM part processing according to claim 1, characterized in that, the second telescopic member comprises a second fixed cylinder, a second connecting rod and a second telescopic spring, the second fixed cylinder is fixedly connected with the mounting plate and located at other two sides of the mounting plate, one end of the second connecting rod is slidingly connected with the second fixed cylinder, the other end of the second connecting rod is fixedly connected with the positioning slider, and the second telescopic spring is arranged in the second fixed cylinder and one end of the second telescopic spring is fixedly connected with the second connecting rod.

4. The die changing mechanism for MIM part processing according to claim 1, characterized in that, the mounting plate has short limiting grooves and long limiting grooves, the short limiting grooves are arranged at opposite sides of the mounting plate and matched with the positioning slider and the limiting block, and the long limiting grooves are arranged at opposite other sides of the mounting plate and matched with the positioning slider and the limiting block.

5. The die changing mechanism for MIM part processing according to claim 4, characterized in that, the mounting plate further has a first fixing hole and a second fixing hole, the first fixing hole is matched with the first fixed cylinder, and the second fixing hole is matched with the second fixed cylinder.

Images