Injection mold insert heat treatment fixture

Abstract

The utility model discloses an injection mold insert heat treatment fixture, including outer frame, insert cushion block and bolt, the rectangular area of outer frame enclosure is the clamping area of insert, and the threaded through -hole is processed on at least one lateral wall of outer frame, and a plurality of threaded through -holes are along the length direction distribution of outer frame lateral wall, and insert cushion block is supported and is installed on the inner lateral wall of outer frame through threaded through -hole, and the detachable connection between insert cushion block and outer frame, and the parallel close -fit between insert cushion block outside surface and the inner lateral wall of outer frame, the outside surface of insert cushion block is equipped with a plurality of positioning hole, and the threaded through -hole on the lateral wall of outer frame is one -to -one corresponding between positioning hole, and a plurality of bolts are respectively passed through corresponding threaded through -hole and are tightly in the positioning hole of insert cushion block, the inner lateral surface of insert cushion block is tightly insert outer surface, and the lateral outer frame lateral wall of insert cushion block and opposite side will insert clamping and fix in the clamping area, this fixture can reduce the deformation of insert because of self weight and uneven cooling, improve the heat treatment stability of insert.

Description

Technical Field

[0001] This utility model belongs to the field of heat treatment technology for injection molds, and specifically relates to a heat treatment fixture for injection mold inserts. Background Technology

[0002] During injection molding or die casting, molds are subjected to repeated scouring and friction from molten plastic or metal. If the inserts are not hard enough, the cavity surface will wear quickly, leading to dimensional errors, surface scratches, and a shortened mold life. Therefore, heat treatment of mold inserts is a crucial step in mold manufacturing. Heat treatment optimizes the insert material by refining grains, homogenizing the microstructure, eliminating internal stress, and enhancing mechanical properties through heating, holding, and cooling. Mold inserts are prone to deformation during heat treatment, primarily due to two reasons: first, the temperature difference between the workpiece surface and core during heating and cooling causes asynchronous expansion and contraction, generating internal stress and deformation; second, the different specific volumes of different microstructures during phase transformation lead to inconsistent volume changes, resulting in internal stress deformation. Therefore, stable tooling fixtures are essential for controlling insert deformation during heat treatment. Existing fixing methods generally involve simple binding with iron wire or temporary welding of the insert to a bracket. This not only damages the workpiece but also fails to eliminate the internal stress of the insert during heat treatment and lacks support, which can easily lead to deformation of the insert. Utility Model Content

[0003] To address the aforementioned problems and technical requirements, this utility model provides a heat treatment fixture for injection mold inserts. This fixture can support and fix the mold inserts, minimizing deformation caused by their own weight and uneven cooling, and improving the heat treatment stability of the inserts.

[0004] The technical solution of this utility model is as follows: a heat treatment fixture for injection mold inserts, including an outer frame, insert pads, and bolts. The rectangular area enclosed by the outer frame is the clamping area of ​​the insert. At least one side wall of the outer frame is machined with threaded through holes, and multiple threaded through holes are distributed along the length of the side wall of the outer frame. The insert pads are supported and installed on the inner side wall of the outer frame through the threaded through holes. The insert pads and the outer frame are detachably connected. The outer side of the insert pads is parallel and close to the inner side wall of the outer frame. The outer side of the insert pads is provided with multiple positioning holes, and the positioning holes correspond one-to-one with the threaded through holes on the side wall of the outer frame. The front end face of the bolts is flat, and multiple bolts pass through the corresponding threaded through holes and are pressed into the positioning holes of the insert pads. The inner side of the insert pads presses against the outer surface of the inserts, and the insert pads and the opposite side wall of the outer frame clamp and fix the inserts in the clamping area. The system employs an outer frame and insert pads. The outer frame provides stable support, while the insert pads apply pressure to the inserts, clamping and fixing them in place. The insert pads and outer frame together provide stable support for the inserts, preventing them from deforming during heat treatment due to their own weight and the lack of external restraint.

[0005] Furthermore, the inner surface of the insert pad is provided with a contoured groove that corresponds to the pressure-bearing part of the insert. The contoured groove can fit between the insert and the pad, providing better positioning of the insert and improving the clamping effect.

[0006] Furthermore, the outer frame is a one-piece rectangular frame. Several threaded through holes are machined on the two vertical sidewalls of the outer frame. Two vertical and adjacent inner sidewalls of the outer frame each support and connect to an insert pad. The two insert pads and the two inner sidewalls without insert pads together clamp an insert. The two insert pads provide four-sided clamping for the insert, resulting in more stable clamping for larger inserts or inserts that can withstand clamping forces on all four sides.

[0007] Furthermore, a lifting lug is installed on each side of the top surface of the outer frame, and the outer frame and the clamped insert are suspended in the heat treatment furnace through the lifting lug.

[0008] Furthermore, the outer frame includes support rods and movable sidewalls. Clamping rods are connected to both ends of the support rods, and the ends of the clamping rods are threaded. The support rods and clamping rods are coaxially integrated parts. The two support rods are arranged in parallel. The two movable sidewalls are inserted into the support rods from the clamping rods at both ends. The movable sidewalls are locked to the support rods by fastening nuts. The fastening nuts are threadedly connected to the ends of the clamping rods, and the fastening nuts securely press the movable sidewalls against the end faces of the support rods. The work area enclosed by the two support rods and the two movable sidewalls is the clamping area for the insert. This fixture can only clamp the insert from two opposite surfaces, making it suitable for clamping slender or cylindrical inserts.

[0009] Furthermore, the movable sidewall is machined with threaded through holes, and the insert pad and the movable sidewall are connected by bolts.

[0010] Furthermore, both the outer frame and the insert pads are made of heat-resistant steel.

[0011] The beneficial effects of this utility model are as follows: 1) This fixture uses a fixed outer frame and movable insert pads to fix and clamp the insert. Depending on the shape of the insert, insert pads that are compatible with the thickness of the insert and the shape of the groove and insert can be selected for installation. This improves the clamping stability. The freely combinable outer frame and insert pads also improve the flexibility and practicality of this fixture. 2) This fixture has two forms. When the insert is cylindrical or slender, only support is needed at both ends, so one insert pad can be set. The support rods that make up the outer frame can also be replaced according to the length of the insert. When the insert is blocky or has similar longitudinal and transverse dimensions, an integrated outer frame and two insert pads can be set. This can effectively support and fix the insert from four directions. The stably supported insert can effectively resist heat treatment deformation and maintain its original shape and performance during heat treatment. 3) The outer frame surrounding the insert prevents the insert from being collided with and protects the internal insert during movement and furnace loading. Attached Figure Description

[0012] Figure 1 This is an assembly drawing of Embodiment 1 of the heat treatment fixture for injection mold inserts of this utility model; Figure 2 This is a partial disassembly diagram of Embodiment 1 of the heat treatment fixture for injection mold inserts of this utility model; Figure 3 This is a schematic diagram of the outer side of Embodiment 2 of the heat treatment fixture for injection mold inserts of this utility model; Figure 4 This is a schematic diagram of the inner side of Embodiment 2 of the heat treatment fixture for injection mold inserts of this utility model; The markings in the diagram are: outer frame 1, threaded through hole 11, insert pad 2, positioning hole 21, bolt 3, clamping area 4, lifting lug 5, support rod 6, clamping round rod 61, fastening nut 7, movable side wall 8. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] like Figure 1-2 The diagram shown is a structural diagram of Embodiment 1; The injection mold insert heat treatment fixture includes an outer frame 1, insert pads 2, and bolts 3. The rectangular area enclosed by the outer frame 1 is the clamping area 4 of the insert. At least one side wall of the outer frame 1 is machined with threaded through holes 11, and multiple threaded through holes 11 are distributed along the length of the side wall of the outer frame. The insert pads 2 are supported and installed on the inner side wall of the outer frame through the threaded through holes 11. The insert pads 2 and the outer frame 1 are detachably connected. The outer side of the insert pads 2 is parallel and close to the inner side wall of the outer frame. The outer side of the insert pads 2 is provided with multiple positioning holes 21, and the positioning holes 21 correspond one-to-one with the threaded through holes 11 on the side wall of the outer frame. The front end face of the bolts 3 is flat, and multiple bolts 3 pass through the corresponding threaded through holes 11 and are tightened in the positioning holes 21 of the insert pads 2. The inner side of the insert pads 2 presses against the outer surface of the insert, and the insert pads 2 and the opposite side wall of the outer frame clamp and fix the insert in the clamping area 4.

[0015] The outer frame 1 includes support rods 6 and movable sidewalls 8. Clamping rods 61 are connected to both ends of the support rods 6. The ends of the clamping rods 61 are threaded. The support rods 6 and clamping rods 61 are coaxially integrated parts. The two support rods 6 are arranged in parallel. The two movable sidewalls 8 are inserted into the support rods 6 from the clamping rods 61 at both ends. The movable sidewalls 8 are locked to the support rods 6 by fastening nuts 7. The fastening nuts 7 are threadedly connected to the ends of the clamping rods 61, and the fastening nuts 7 tighten and fix the movable sidewalls 8 against the end faces of the support rods. The work area enclosed by the two support rods 6 and the two movable sidewalls is the clamping area 4 for the insert. This fixture can only clamp the insert from two opposite sides, and is suitable for clamping slender or cylindrical inserts. Threaded through holes 11 are machined on the movable sidewalls. The insert pad 2 and the movable sidewalls 8 are connected by bolts 3.

[0016] Both the outer frame 1 and the insert pad 2 are made of heat-resistant steel. The inner surface of the insert pad 2 is provided with a contour groove (not shown in the figure) that corresponds to the pressure part of the insert. In practical applications, contour grooves of different shapes can be customized according to the shape of the insert to be clamped. When clamping a certain insert, an insert pad with the corresponding contour groove is selected. This can effectively improve the utilization rate of the fixture and enable it to be used with various inserts for heat treatment processing.

[0017] In Example 1, when the insert is cylindrical or slender, only support is needed at both ends. An insert pad can be set, and the support rods that make up the outer frame can also be replaced according to the length of the insert. This improves the flexibility and versatility of the fixture and makes it suitable for clamping workpieces of various lengths.

[0018] like Figure 3-4 The diagram shown is a structural diagram of Embodiment 2; The injection mold insert heat treatment fixture includes an outer frame 1, insert pads 2, and bolts 3. The rectangular area enclosed by the outer frame 1 is the clamping area 4 of the insert. At least one side wall of the outer frame 1 is machined with threaded through holes 11, and multiple threaded through holes 11 are distributed along the length of the side wall of the outer frame. The insert pads 2 are supported and installed on the inner side wall of the outer frame through the threaded through holes 11. The insert pads 2 and the outer frame 1 are detachably connected. The outer side of the insert pads 2 is parallel and close to the inner side wall of the outer frame. The outer side of the insert pads 2 is provided with multiple positioning holes 21, and the positioning holes 21 correspond one-to-one with the threaded through holes 11 on the side wall of the outer frame. The front end face of the bolts 3 is flat, and multiple bolts 3 pass through the corresponding threaded through holes 11 and are tightened in the positioning holes 21 of the insert pads 2. The inner side of the insert pads 2 presses against the outer surface of the insert, and the insert pads 2 and the opposite side wall of the outer frame clamp and fix the insert in the clamping area 4.

[0019] The outer frame 1 is a one-piece rectangular frame. Several threaded through holes 11 are machined on the two vertical side walls of the outer frame 1. Two vertical and adjacent inner side walls of the outer frame 1 each support and connect to an insert pad 2. The two insert pads 2 and the two inner side walls without insert pads together clamp an insert. The two insert pads 2 provide four-sided clamping for the insert, resulting in more stable clamping for larger inserts or inserts that can withstand clamping forces on all four sides. A lifting lug 5 is installed on each side of the top surface of the outer frame 1, suspending the outer frame 1 and the clamped insert in the heat treatment furnace via the lifting lugs 5.

[0020] Example 2 is applicable when the insert is a block or has similar longitudinal and transverse dimensions. An integrated outer frame and two insert pads 2 can be set up so that the insert can be effectively supported and fixed from four directions. The insert, which is stably supported and fixed, can effectively resist heat treatment deformation and maintain its original shape and performance during heat treatment.

[0021] The above descriptions are merely several preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations and substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A heat treatment fixture for injection mold inserts, characterized in that: The device includes an outer frame, insert pads, and bolts. The rectangular area enclosed by the outer frame serves as the clamping area for the insert. At least one side wall of the outer frame has a threaded through hole, and multiple threaded through holes are distributed along the length of the side wall of the outer frame. The insert pads are supported and installed on the inner side wall of the outer frame through the threaded through holes. The insert pads and the outer frame are detachably connected. The outer side of the insert pads is parallel and close to the inner side wall of the outer frame. The outer side of the insert pads has multiple positioning holes, which correspond one-to-one with the threaded through holes on the side wall of the outer frame. The front end face of the bolts is flat, and multiple bolts pass through the corresponding threaded through holes and are tightened into the positioning holes of the insert pads. The inner side of the insert pads presses against the outer surface of the insert, and the insert pads and the opposite side wall of the outer frame clamp and fix the inserts within the clamping area.

2. The heat treatment fixture for injection mold inserts according to claim 1, characterized in that: The inner side of the insert pad is provided with a contoured groove that matches the pressure-bearing part of the insert.

3. The heat treatment fixture for injection mold inserts according to claim 1, characterized in that: The outer frame is a rectangular frame formed in one piece. Several threaded through holes are machined on the two vertical side walls of the outer frame. Two vertical and adjacent inner side walls of the outer frame support and connect an insert pad. The two insert pads and the inner side walls of the two insert pads without insert pads clamp an insert together.

4. The heat treatment fixture for injection mold inserts according to claim 3, characterized in that: A lifting lug is installed on each side of the top surface of the outer frame, and the outer frame and the clamped insert are suspended in the heat treatment furnace through the lifting lug.

5. The heat treatment fixture for injection mold inserts according to claim 1, characterized in that: The outer frame includes support rods and movable sidewalls. Clamping rods are connected to both ends of the support rods, and the ends of the clamping rods are threaded. The support rods and clamping rods are coaxial integral parts. The two support rods are arranged in parallel. The two movable sidewalls are inserted into the support rods from the clamping rods at both ends. The movable sidewalls are locked to the support rods by fastening nuts. The fastening nuts are threadedly connected to the ends of the clamping rods, and the fastening nuts tighten and fix the movable sidewalls against the end faces of the support rods. The work area enclosed by the two support rods and the two movable sidewalls is the clamping area for the insert.

6. The heat treatment fixture for injection mold inserts according to claim 5, characterized in that: The movable sidewall is machined with threaded through holes, and the insert pad and the movable sidewall are connected by bolts.

7. The heat treatment fixture for injection mold inserts according to claim 1, characterized in that: The outer frame and insert pads are both made of heat-resistant steel.

Images