A molding die for molybdenum disilicide heating element

Abstract

This utility model discloses a molding die for molybdenum disilicide heating elements, relating to the field of mold technology. It includes an upper mold assembly, a lower mold assembly, a quick-release locking mechanism, a guiding and positioning device, a detachable mold core insert, and an ejection mechanism. The upper and lower mold assemblies together form a molding cavity. The quick-release locking mechanism consists of a side-mounted locking arm and a corresponding locking tongue. One end of each locking arm is hinged to the upper mold assembly, and the other end of the locking arm has a locking groove. The locking arm achieves integrated locking or unlocking with the locking tongue by flipping. The detachable mold core insert is locked by vertically sliding into the slot and a lateral pin. Different specifications of mold cores can be quickly replaced without disassembling the entire mold, simplifying the mold core maintenance process and reducing production costs.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a molding die for molybdenum disilicide heating elements. Background Technology

[0002] In the field of high-temperature electric heating element manufacturing, molybdenum disilicide (MoSi2) is widely used in the molding of electric furnaces and industrial heating devices due to its excellent high-temperature resistance and electrical conductivity. However, existing production processes mostly adopt extrusion molding, which requires the addition of a large amount of binders. In order to produce higher purity molybdenum disilicide heating elements, very few additives are needed, and existing extrusion molding methods are difficult to meet the molding requirements. Based on this, this utility model provides a molding die structure in which the upper and lower die components are quickly locked without tools by a side-mounted quick-release locking arm and locking tongue, V-shaped guide positioning, vertical sliding detachable die core, and linear push rod ejection. This significantly improves the ease of disassembly, positioning accuracy, and mold change efficiency, and enhances the wear resistance and demolding reliability of the die. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a molybdenum disilicide heating element molding die, which solves the problems mentioned in the background.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a molybdenum disilicide heating element molding die, comprising an upper mold assembly, a lower mold assembly, a quick-release locking mechanism, a guide positioning device, a detachable mold core insert, and an ejection mechanism. The upper mold assembly and the lower mold assembly together form a molding cavity. The quick-release locking mechanism consists of a side-mounted locking arm and a corresponding locking tongue. One end of each locking arm is hinged to the upper mold assembly, and the other end of the locking arm has a locking groove. The locking arm can be flipped to achieve integrated locking or unlocking with the locking tongue. The guide positioning device includes a guide pin disposed on the side wall of the upper mold assembly and a guide hole disposed on the side wall of the lower mold assembly. The guide pin is inserted into the guide hole, and the clearance is controlled within a certain range. The mold core is designed with a precision range of 0.05 to 0.2 mm to ensure high-precision alignment during mold opening and closing. The detachable mold core insert engages with the side walls of the upper and lower mold assemblies via a vertically sliding groove. It is pressed in and positioned when closed and locked by a lateral pin. A locking rod is threaded onto the side of the lower mold assembly, with one end of the rod penetrating the pin from the outside of the lower mold assembly. To remove the mold core, simply pull the pin horizontally; different mold core sizes can be quickly replaced. The ejection mechanism includes a push rod located at the bottom of the lower mold assembly and a push plate that slides along a straight line. The push rod is detachably mounted to the bottom plate of the lower mold assembly via a positioning pin. After the mold is opened, the push rod is pushed in using an external handle, driving the push plate to eject the molded part along the straight line.

[0005] As a further technical solution of this utility model, the parting surface of the upper mold assembly and the lower mold assembly adopts a V-shaped concave-convex structure, which is automatically guided by the oblique guide and reduces the jamming of the parting surface.

[0006] As a further technical solution of this utility model, the locking arm and the locking tongue of the quick-release locking mechanism are not connected by a spring. After the locking arm is hinged, it relies on leverage to achieve locking. A ratchet scale mark is provided on the back of the locking arm to indicate the locking position.

[0007] As a further technical solution of this utility model, the tolerance of the sliding slot and the mold core insert is controlled within 0.1mm to ensure accurate positioning and convenient replacement.

[0008] As a further technical solution of this utility model, the push rod and the push plate are connected by a straight guide on both sides, and the detachable positioning pin hole is hard nitrided to improve wear resistance and ensure smooth ejection.

[0009] As a further technical solution of this utility model, the upper mold assembly and the lower mold assembly are made of high-temperature alloy casting, and the inner surface of the molding cavity is treated with hard nitriding or carburizing to improve wear resistance and prevent the molded parts from adhering.

[0010] As a further technical solution of this utility model, a telescopic rod 1 is fixedly connected to the bottom surface of the lower mold assembly, a limiting rod is bolted to one side of the telescopic rod 1, a base plate is fixedly connected to the bottom surface of the telescopic rod 1, and a telescopic rod 2 is bolted to the four corners of the bottom surface of the lower mold assembly. A foot pad is fixedly connected to the bottom surface of the telescopic rod 2.

[0011] This utility model provides a molding die for molybdenum disilicide heating elements, which has the following advantages compared with the prior art:

[0012] 1. The molybdenum disilicide heating element molding die designed in this paper has a tool-free quick-release locking mechanism consisting of a side-mounted locking arm and a locking tongue. This mechanism allows the upper and lower dies to be locked or unlocked simply by flipping the locking arm, which greatly shortens the mold opening and closing and maintenance time and improves the mold changeover efficiency.

[0013] 2. The molybdenum disilicide heating element molding die designed in this paper uses a detachable mold core insert that slides vertically into the slot and is locked by a side pin. Different specifications of mold cores can be quickly replaced without disassembling the entire mold, which simplifies the mold core maintenance process and reduces production costs.

[0014] 3. The molybdenum disilicide heating element molding die designed in this paper uses a linear push rod and push plate ejection mechanism at the bottom of the lower die, which is installed by a detachable positioning pin and slides along the guide line to achieve stable and uniform ejection of the molded part, reducing manual intervention and demolding damage.

[0015] 4. The molybdenum disilicide heating element molding die designed in this paper, with four corner telescopic support rods in conjunction with adjustable feet and limit rods, not only ensures the levelness and stability of the die during assembly and operation, but also facilitates fixed connection with external auxiliary equipment and adapts to various production site layouts. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a molybdenum disilicide heating element molding die;

[0017] Figure 2 A schematic diagram showing the disassembled structure of a molybdenum disilicide heating element molding die;

[0018] Figure 3 A schematic cross-sectional elevation view of a molding die for a molybdenum disilicide heating element;

[0019] Figure 4 A schematic diagram of the upper mold assembly structure of a molybdenum disilicide heating element molding die;

[0020] Figure 5 A molding die for a molybdenum disilicide heating element Figure 3 Enlarged structural diagram.

[0021] In the diagram: 1. Upper mold assembly; 2. Lower mold assembly; 3. Quick-release locking mechanism; 31. Locking arm; 33. Locking tongue; 4. Guide positioning device; 41. Guide pin; 42. Guide hole; 5. Mold core insert; 52. Pin; 6. Ejection mechanism; 61. Push rod; 62. Push plate; 7. Telescopic rod one; 8. Telescopic rod two. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution for molding a molybdenum disilicide heating element:

[0024] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the system includes an upper mold assembly 1, a lower mold assembly 2, a quick-release locking mechanism 3, a guide and positioning device 4, a detachable mold core insert 5, and an ejection mechanism 6. When closed, the upper mold assembly 1 forms a completely enclosed molding cavity with the lower mold assembly 2 through the parting surface. Simultaneously, the tolerance of the guide groove and the retaining groove is controlled within 0.1mm to ensure no shaking and good sealing, improving the sealing and molding uniformity of the mold, and maintaining stable machining at high temperatures, ensuring a smooth surface and accurate dimensions of the molded part. The upper mold assembly 1 and the lower mold assembly 2 together enclose the molding cavity. The quick-release locking mechanism 3 consists of a side-mounted locking arm 31 and a corresponding locking tongue 33. One end of each locking arm 31 is hinged to the upper mold assembly 1, and the other end of the locking arm 31 has a locking groove. The locking arm 31 engages and disengages from the locking tongue 33 by flipping. The operator manually flips the locking arm 31 outward, using leverage to engage the locking groove with the locking tongue 33, and confirms that it is locked in place by using the scale markings. To release, the locking arm 31 is flipped in the opposite direction for quick unlocking. There is no spring between the locking arm 31 and the locking tongue 33, which reduces the failure rate and allows for quick locking and unlocking without tools and with one hand, significantly shortening the mold assembly and disassembly time and meeting the needs of high-frequency mold changes. The guide positioning device 4 includes a guide pin 41 set on the side wall of the upper mold assembly 1 and a corresponding guide hole 42 set on the side wall of the lower mold assembly 2. The guide pin 41 is inserted into the guide hole 42, and the fit clearance is controlled within the range of 0.05 to 0.2 mm. To ensure high-precision alignment during mold opening and closing, a detachable mold core insert 5 is provided. This insert 5 engages with the side walls of the upper mold assembly 1 and lower mold assembly 2 via a vertically sliding groove. When closed, it is pressed in for positioning and locked by a lateral pin 52. A locking rod is threaded onto the side of the lower mold assembly 2, with one end of the rod penetrating through the pin 52 from the outside. To remove the mold core, simply pull the pin 52 horizontally. This allows for quick replacement of different mold core specifications. The mold core insert 5 is slid vertically into the groove, and after closing the mold, the top of the module is slightly pressed into a positioning step. The lateral pin 52 is then inserted through the hole in the side wall of the lower mold assembly to lock it in place. For replacement, simply pull out the pin 52, and the entire mold core module can be smoothly removed. It supports quick and error-free insertion and removal, reduces manual adjustment errors, enables convenient switching between multiple product specifications, and reduces downtime. The ejection mechanism 6 includes a push rod 61 located at the bottom of the lower mold assembly 2 and a push plate 62 that slides in a straight line. The push rod 61 is detachably installed on the bottom plate of the lower mold assembly 2 via a positioning pin. After the mold is opened, the push rod 61 is pushed in through an external handle, driving the push plate 62 to eject the molded part in a straight line. After the mold is opened, the operator pushes the push rod 61 in through an external handle, pushing the push plate 62 forward along the guide rail to evenly eject the molded part from the mold cavity. The push rod 61 can be disassembled after resetting for cleaning or replacement, achieving stable and even ejection of the molded part without the need for additional tools or manual squeezing, improving demolding reliability and protecting the integrity of the molded part.

[0025] like Figure 1As shown, the parting surface of the upper mold assembly 1 and the lower mold assembly 2 adopts a V-shaped concave-convex structure, which is automatically guided by the oblique guide and reduces the jamming of the parting surface.

[0026] like Figure 4 As shown, the locking arm 31 of the quick-release locking mechanism 3 is not connected to the locking tongue 33 by a spring. After the locking arm 31 is hinged, it is locked by lever force. A ratchet scale mark is provided on the back of the locking arm 31 to indicate the locking position.

[0027] like Figure 3 As shown, the tolerance of the sliding slot and the mold core insert 5 is controlled within 0.1mm to ensure accurate positioning and convenient replacement.

[0028] like Figure 5 As shown, the push rod 61 and the push plate 62 are connected by guide lines on both sides. The detachable positioning pin holes are hard nitrided to improve wear resistance and ensure smooth ejection.

[0029] like Figure 1 As shown, the upper mold assembly 1 and the lower mold assembly 2 are made of high-temperature alloy casting. The inner surface of the molding cavity is treated with hard nitriding or carburizing to improve wear resistance and prevent the molded parts from sticking.

[0030] like Figure 5 As shown, a telescopic rod 7 is fixedly connected to the bottom surface of the lower mold assembly 2. A limiting rod is bolted to one side of the telescopic rod 7. A base plate is fixedly connected to the bottom surface of the telescopic rod 7. Telescopic rods 8 are bolted to the four corners of the bottom surface of the lower mold assembly 2. Foot pads are fixedly connected to the bottom surface of the telescopic rods 8. By lifting the bottom surface of the lower mold assembly 2, the telescopic rods 7 and 8 extend. Several limiting holes are opened on the outer side of the telescopic rods 7 and 8. The limiting rods pass through the limiting holes on the outer side of the telescopic rods 7 and 8 and rotate to fix the telescopic rods 7 and 8.

[0031] The working principle of this utility model is as follows: When the upper mold assembly 1 and the lower mold assembly 2 are closed, the V-shaped concave-convex parting surface first achieves automatic guidance and pre-alignment of the two components; then the operator flips the locking arm 31, and uses the lever engagement between the locking arm 31 and the locking tongue 33 to tightly lock the upper mold assembly 1 and the lower mold assembly 2 to form a highly sealed molding cavity. During the molding process, the guide pin 41 is continuously inserted into the guide hole 42 to maintain high repeatability positioning accuracy in all directions of the mold cavity. After the molding is completed and the mold is opened, the push rod 61 moves along the guide straight line. The moving push plate 62 moves forward, and the molding part is evenly and smoothly ejected from the mold cavity by linear ejection force, avoiding stress concentration and product damage caused by traditional extrusion ejection. For molding requirements of different specifications, the side pin 52 is first pulled out, and the detachable mold core insert 5 module is slid out vertically. After installing the new mold core insert 5, the pin 52 is inserted again to achieve quick mold change. The telescopic rod 1 7 and telescopic rod 2 8, together with the foot pad 80 and the limiting rod 90, make fine adjustments and fix the position of the mold as a whole, ensuring the precise docking of the tooling and the production line.

[0032] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A forming mold for a molybdenum disilicide electrocaloric element, characterized in that, The system includes an upper mold assembly (1), a lower mold assembly (2), a quick-release locking mechanism (3), a guide positioning device (4), a detachable mold core insert (5), and an ejection mechanism (6). The upper mold assembly (1) and the lower mold assembly (2) together form a molding cavity. The quick-release locking mechanism (3) consists of a side-mounted locking arm (31) and a corresponding locking tongue (33). One end of each locking arm (31) is hinged to the upper mold assembly (1), and the other end of the locking arm (31) is provided with a locking groove. The locking arm (31) can be flipped to achieve integrated locking or unlocking with the locking tongue (33). The guide positioning device (4) includes a guide pin (41) set on the side wall of the upper mold assembly (1) and a guide hole (42) set on the side wall of the lower mold assembly (2). The guide pin (41) is inserted into the guide hole (42), and the fit clearance is controlled between 0.05 and 0.2 mm. The range is mm to ensure high-precision alignment when the mold is opened and closed. The detachable mold core insert (5) is fitted with the side of the molding cavity wall of the upper mold assembly (1) and the lower mold assembly (2) through a vertical sliding groove. When closed, it is pressed in for positioning and locked by a side pin (52). The side of the lower mold assembly (2) is threaded with a locking rod. One end of the locking rod is connected to the pin (52) through the outside of the lower mold assembly (2). When pulled out, only the pin (52) needs to be pulled out horizontally to quickly replace the mold core of different specifications. The ejection mechanism (6) includes a push rod (61) set at the bottom of the lower mold assembly (2) and a push plate (62) that slides along a straight line. The push rod (61) is detachably installed on the bottom plate of the lower mold assembly (2) through a positioning pin. After the mold is opened, the push rod (61) is pushed in through the external handle to drive the push plate (62) to eject the molded part along the straight line.

2. A forming die for molybdenum disilicide heating elements according to claim 1, wherein The parting surfaces of the upper mold assembly (1) and the lower mold assembly (2) adopt a V-shaped concave-convex structure, which is automatically guided by the oblique guide and reduces the jamming of the parting surface.

3. A forming die for molybdenum disilicide heating elements according to claim 1, wherein The locking arm (31) of the quick-release locking mechanism (3) is not connected to the locking tongue (33) by a spring. After the locking arm (31) is hinged, it is locked by lever force. A ratchet scale mark is provided on the back of the locking arm (31) to indicate the locking position.

4. A mold for forming a molybdenum disilicide heating element according to claim 1, wherein The tolerance of the sliding slot and the mold core insert (5) is controlled within 0.1mm to ensure accurate positioning and convenient replacement.

5. The molybdenum disilicide heating element molding die according to claim 1, characterized in that, The push rod (61) and the push plate (62) are connected by guide lines on both sides. The detachable positioning pin holes are hard nitrided to improve wear resistance and ensure smooth ejection.

6. A mold for forming a molybdenum disilicide heating element as defined in claim 1, wherein The upper mold assembly (1) and the lower mold assembly (2) are made of high-temperature alloy casting. The inner surface of the molding cavity is treated with hard nitriding or carburizing to improve wear resistance and prevent the molded parts from adhering.

7. A mold for forming a molybdenum disilicide heating element as defined in claim 1, wherein The bottom surface of the lower mold assembly (2) is fixedly connected to a telescopic rod one (7), a limiting rod is bolted to one side of the telescopic rod one (7), a base plate is fixedly connected to the bottom surface of the telescopic rod one (7), and telescopic rod two (8) is bolted to the four corners of the bottom surface of the lower mold assembly (2). A foot pad is fixedly connected to the bottom surface of the telescopic rod two (8).

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