Metal powder small-batch sintering mold

Abstract

The utility model discloses a small-batch sintering die for metal powder. The small-batch sintering die comprises a forming die, a pressurizing module and an induction heating module, the forming die is composed of an outer frame, a comb tooth positioning plate, a partition plate, a side plate and a pressing strip, and a plurality of closed spaces are formed to be filled with metal powder. An induction heating coil is arranged on the periphery of the forming die to provide heat required by sintering; and pressing plates are arranged on the upper and lower sides and connected with a press machine to provide pressure required by forming. The device is reasonable in structure and scientific in working mode, and solves the technical problem of firing and forming of small-batch metal powder.

Description

Technical Field

[0001] The utility model relates to the field of production and processing, in particular to a small batch sintering die for metal powder. Background Art

[0002] Powder metallurgy is an industrial technology for producing metal materials, composite materials and various types of products, and is widely used in various fields. However, the process characteristics of powder metallurgy determine that this process has significant cost advantages only when used for mass production by professional manufacturers, and the cost is very high for small sample trial production and small quantity production.

[0003] In view of this, we propose a metal powder small batch sintering mold to solve the problem of high powder metallurgy cost in small sample trial production and small quantity production. Summary of the invention

[0004] In order to solve the problem of high powder metallurgy cost in the above-mentioned small-scale trial production and small-scale production, the utility model discloses a small-batch sintering mold for metal powder. The technical solution of the utility model is implemented as follows:

[0005] A metal powder small batch sintering die, comprising a forming die, a pressurizing module and an induction heating module;

[0006] The forming mold is arranged in the pressurizing module, and the induction heating module is arranged on the side of the forming mold;

[0007] The molding die comprises an outer frame, two comb-tooth positioning plates, at least two partitions, two side plates and at least two pressure strips;

[0008] The comb teeth positioning plate and the side plate close the inner side wall of the outer frame;

[0009] The comb tooth positioning plate includes at least two tooth grooves;

[0010] The partitions are fixed in the tooth grooves, and the pressure strips are arranged between the partitions to form a cavity for filling metal powder.

[0011] Preferably, the outer frame is made of metal, and the comb positioning plate, the partition plate, the side plate and the pressure strip are all made of graphite.

[0012] Preferably, the outer frame is provided with set screws.

[0013] Preferably, the end surface of the forming die contacting the pressure strip is provided with a heat insulation plate for connecting to a press.

[0014] Preferably, the induction heating module comprises an induction coil circumferentially surrounding the forming mold.

[0015] When this embodiment is used, the molding die is first assembled. Among them, the pressure strip is installed on the lower side first, and the pressure strip on the upper side is installed after the metal powder is filled. The molding die is placed in the pressurizing module and the induction heating module is installed. The induction heating module is started, and the outer frame generates eddy currents and heats up under the action of the current of the induction heating module, thereby heating the molding die. While heating, the pressurizing module applies pressure. When the temperature and pressure reach the set value, the product molding is completed, and the molding die is demolded after cooling.

[0016] The utility model is simple and reasonable, easy to operate, long in service life and can be repeatedly used, has low cost, and can meet the production needs of small batches of metal products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of a metal powder small batch sintering mold;

[0020] Figure 2 A top view of a forming die of an embodiment of a metal powder small batch sintering die;

[0021] Figure 3 It is a side view of a forming mold of an embodiment of a metal powder small batch sintering mold, wherein the dotted line in the figure represents the shape of the bead inside the outer frame, and the gap between the upper and lower bead is the empty cavity for accommodating the metal powder;

[0022] In the above drawings, the figure numbers represent:

[0023] 1. Molding mold;

[0024] 1a-outer frame; 1b-comb positioning plate; 1c-partition plate, 1d-side plate; 1e-pressing strip;

[0025] 2. Pressurization module;

[0026] 3. Induction heating module. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example

[0029] In a specific embodiment, Figure 1 , Figure 2 and Figure 3 The present invention discloses a small batch sintering mold for metal powder used for making rectangular metal parts, comprising a forming mold 1, a pressurizing module 2 and an induction heating module 3. The forming mold 1 is arranged in the pressurizing module 2, and the induction heating module 3 is arranged on the side of the forming mold 2. The forming mold 1 comprises an outer frame 1a, a comb tooth positioning plate 1b, a partition 1c, a side plate 1d, and a pressure strip 1e; the comb tooth positioning plate 1b and the side plate 1c close the inner side wall of the outer frame 1a; the comb tooth positioning plate 1b comprises at least a plurality of tooth grooves; a plurality of comb tooth positioning plates 1c are fixed in a plurality of tooth grooves, and the pressure strip 1e is arranged between the partitions 1c and constitutes a cavity for filling metal powder.

[0030] In this embodiment, the outer frame 1a is made of heat-resistant steel, and set screws are provided on the adjacent two sides; the comb tooth positioning plate 1b, the partition plate 1c, and the side plate 1d are of the same height, and the height of the outer frame 1a is not greater than the comb tooth positioning plate 1b; the height of the pressure strip 1e is less than half of the height of the comb tooth positioning plate 1b. The difference between the height of the comb tooth positioning plate 1b and the height of the two pressure strips 1e is the final height of the rectangular metal part.

[0031] In a preferred embodiment, the end surface of the pressurizing module 2 contacting the pressure strip 1e is provided with a heat insulation board for connecting to a press. The heat insulation board serves as heat insulation on one hand and as a connection to the press on the other hand. The pressure is balanced by the contact between the heat insulation board and the pressure strip 1e.

[0032] In this embodiment, the induction heating module 3 uses medium frequency current, and the induction coil therein is made into the same shape as the outer frame 1a and surrounds the outer frame 1a at equal distances.

[0033] When in use, first assemble the molding die 1, among which there are two beading strips 1e, first install the bottom beading strip 1e, and after filling the metal powder, install the top beading strip 1e, and tighten the set screws on the outer frame 1a. Place the filled molding die 1 between the two insulation boards of the pressurizing module 2, and at the same time connect the induction coil of the induction heating module 3.

[0034] The induction heating module 3 is started, and the outer frame 1a generates eddy current and heat under the action of the current of the induction coil, thereby heating the molding die 1. When the temperature and pressure reach the set value, the product molding is completed, and the molding die 1 is demoulded after cooling.

[0035] This embodiment can form metal products of required shapes and meet the production needs of small batches. It has a simple and reasonable structure, is easy to operate, has a long life and can be reused, and has low cost. It is suitable for the forming and processing of small batches of powdered metals.

[0036] It should be pointed out that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A metal powder small batch sintering mold, characterized in that: It includes a forming die, a pressurizing module and an induction heating module; The forming mold is arranged in the pressurizing module, and the induction heating module is arranged on the side of the forming mold; The molding die comprises an outer frame, two comb-tooth positioning plates, at least two partitions, two side plates and at least two pressure strips; The comb teeth positioning plate and the side plate close the inner side wall of the outer frame; The comb tooth positioning plate includes at least two tooth grooves; The partitions are fixed in the tooth grooves, and the pressure strips are arranged between the partitions to form a cavity for filling metal powder.

2. A metal powder small batch sintering mold according to claim 1, characterized in that: The outer frame is made of metal, and the comb tooth positioning plate, the partition plate, the side plate and the pressure strip are all made of graphite.

3. A metal powder small batch sintering mold according to claim 1, characterized in that: The outer frame is provided with set screws.

4. The metal powder small batch sintering mold according to claim 1, characterized in that: The end surface of the molding die contacting the pressure strip is provided with a heat insulation plate for connecting to a press.

5. The metal powder small batch sintering mold according to claim 1, characterized in that: The induction heating module includes an induction coil circumferentially surrounding the forming mold.

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