CN202241546U - A forming mold for making a mold core rod with cemented carbide material - Google Patents

Abstract

The utility model discloses a forming die with carbide material preparation mould core bar belongs to electronic component basic magnetic material product and makes technical field. The utility model discloses an improvement on the used forming die basis of magnetic blank product is made to prior art. The improvement point is mainly characterized in that one end of a mold core rod is made into an external thread structure, in addition, a hard alloy material is used for making an alloy core with an internal thread structure, the alloy core is connected with the external thread of the thread end of the core rod, and meanwhile, a female mold alloy is embedded in the inner wall of a through hole of a female mold, so that the magnetic powder slurry is in direct contact with the alloy core and frequently moves in the process of pressing the magnetic powder slurry into a blank product in a forming mold. Due to the characteristic of hardness of the hard alloy material, the abrasion of the alloy core is effectively reduced, the precision of a formed blank product is ensured, the product quality is improved, and the service life of the die is prolonged.

Description

A forming mold for making a mold core rod with cemented carbide material

technical field

The utility model relates to a molding die, in particular to a molding die for making a mold core rod with a hard alloy material, and belongs to the technical field of electronic component manufacturing.

Background technique

It is the obligatory responsibility of the magnetic material manufacturing industry to use magnetic materials to manufacture various magnetic products with different specifications and shapes to meet the market demand of electronic communications, home appliances, automobile manufacturing and other industries. With the development of science and technology, magnetic products not only have a wider range of applications, but also require higher precision. As we all know, magnetic products of different specifications and shapes are manufactured by using magnetic raw materials. The usual process is to make various raw materials that constitute the performance requirements of magnetic products according to a certain proportion, and then put them together for crushing, stirring and other processes. The slurry is pressed into a rough product through a mold equipped with the required product shape and size requirements, and then manufactured through sintering and other processes. Therefore, for the quality and dimensional accuracy requirements of magnetic products, the accuracy requirements of pressed blank products are particularly important. In the prior art, the material of the core rod in the forming mold for manufacturing the magnetic blank product is generally made of ordinary steel. Because the magnetic powder slurry is pressed into the rough product in the mold, the core rod moves back and forth in the mold cavity most frequently, and thus suffers the fastest wear. The direct result of the wear of the core rod is that the precision of the pressed blank product is reduced, which in turn affects the product quality.

Contents of the invention

In order to solve the above existing problems, the utility model provides a molding die which adopts hard alloy material to make a mold core rod. With this molding die, in the process of pressing the blank product, the die alloy inlaid with the alloy core and the inner wall of the through hole of the die is in direct contact with the magnetic powder slurry, and the alloy core moves up and down in the magnetic powder slurry to every A product is pressed. Since the alloy core is made of hard alloy material, its own hardness characteristics effectively reduce the wear of the core rod in the forming mold, ensure the precision of the forming blank product, and increase the service life of the mold . The molding die for making mold core rods with cemented carbide materials is realized through the following technical scheme: a molding die for making mold core rods with cemented carbide materials, which mainly includes an upper mold, a concave mold, a lower mold and a core rod. The upper mold is a convex mold structure, the concave mold is a through hole structure and the inner wall of the through hole is inlaid with a concave mold alloy made of an alloy material. The outer diameter of the upper die is equal to the inner diameter of the die alloy. The lower mold is a convex mold and has a through-hole structure. The core rod passes through the through hole of the lower mold, and one end of the core rod is provided with an external thread structure in the mold cavity. The alloy core made of alloy material has an internal thread structure, and the alloy core and the threaded end of the core rod are connected by threads. The outer diameter of the lower mold is equal to the inner diameter of the die alloy, and the lower die is arranged in the through hole of the die alloy and is slidably connected. The position of the lower mold in the through hole of the die alloy constitutes the space size of the cavity, and the size of the cavity space depends on the size of the manufactured magnetic blank product. That is to say, the space size of the cavity can be determined by the position of the lower die in the through hole of the die alloy. When the magnetic powder slurry is injected into the cavity, the blank product is pressed by the movement of the upper and lower molds, and the alloy core exits the mold-shaped blank product to complete the pressing. During the entire process of pressing the magnetic powder slurry into a blank product, the alloy core is in direct contact with the magnetic powder slurry and moves repeatedly until the blank product is pressed. Due to the hardness characteristics of the alloy material itself, the wear resistance of the mold core rod in the forming mold is greatly enhanced. It ensures the precision of the forming blank product, improves the product quality and prolongs the service life of the forming mold.

As a preference: the thickness of the alloy core made of cemented carbide and having an internal thread structure is 1-2 mm.

Preferably, the die alloy embedded in the inner wall of the through hole of the die has a thickness of 0.5-1 mm.

Description of drawings

Figure 1 is a structural schematic diagram of the mold core rod forming mold made of cemented carbide material.

Detailed ways

Below in conjunction with accompanying drawing 1, provide embodiment of the present utility model, this technical scheme is described in further detail.

Embodiment 1: As shown in Fig. 1, a kind of molding die that makes mold core rod with cemented carbide material. It mainly consists of upper mold 1, concave mold 3, lower mold 2 and core rod 4. Described patrix 1 is punch structure, and die 3 is through-hole structure and inlays the die alloy 5 that is made of alloy material in the inwall of through hole, and patrix 1 external diameter is equal to the inner diameter of die alloy 5; Lower die 2 It is a punch and has a through-hole structure. The outer diameter of the core rod 4 is equal to the inner diameter of the through hole of the lower die 2 and is flexibly connected. The core rod 4 passes through the through hole of the lower die 2 and is placed in the through hole of the die alloy 5. One end of the core rod 4 in the through hole of the die alloy 5 is provided with an external thread structure, and the alloy core 6 is an internal thread structure, and the alloy core 6 is connected to the external thread end of the core rod 4 by threads. The through hole of the die alloy 5, the alloy core 6 and the position of the lower mold 2 in the through hole of the die alloy 5 form the space size of the cavity, and the size of the cavity can be determined according to the size of the blank product to be pressed. After the magnetic powder slurry is injected into the mold cavity, the pressing of the rough product is completed by the movement of the upper die 1 and the lower die 2 . The mandrel 4 then moves out of the cavity. The blank product is pressed, and the cycle goes on and on. During the entire pressing process, the alloy core 6 at the threaded end of the core rod 4 is directly and repeatedly moved in contact with the magnetic powder slurry. Since the alloy core 6 is made of alloy material, and the hardness characteristic of the alloy material itself greatly enhances the wear resistance of the alloy core 6 which is threadedly connected with the core rod 4 in the molding die, ensuring that the formed blank product Accuracy requirements, improve the quality of the forming blank product, prolong the service life of the mold.

Claims (3)

1. mould of making the mould core bar with Hardmetal materials; Mainly by patrix (1); Die (3), counterdie (2) and core bar (4) are formed, and it is characterized in that: said patrix (1) is a punch structure; Die (3) is that through-hole structure and through-hole wall are inlayed the die alloy made from alloy material (5), and the external diameter of patrix (1) equals the internal diameter of die alloy (5); Said counterdie (2) is for punch and be through-hole structure, and core bar (4) is arranged in the through hole of counterdie (2), and counterdie (2) is arranged in die alloy (5) through hole and is slidingly connected; Said core bar (4) passes the through hole of counterdie (2) and is slidingly connected with it; Core bar (4) places the die cavity end to be arranged to external thread structure, and alloy fuse (6) is a female thread structure, and the internal thread of the male end of core bar (4) and alloy fuse (6) is through being threaded; The space that the internal diameter of die alloy (5) through hole and counterdie (2) position and the alloy fuse (6) in die alloy (5) constitutes is a die cavity; The process that magnetic powder slip injection die cavity inherence is pressed into the blank product is directly to be contacted and repeated moving with magnetic powder slip in die cavity by the alloy fuse.

2. according to claim 1ly a kind ofly make the mould of mould core bar with Hardmetal materials, it is characterized in that: the thickness of the said alloy fuse of being processed by Hardmetal materials (6) with female thread structure is 1～2 mm.

3. a kind of mould with Hardmetal materials making mould core bar according to claim 1, it is characterized in that: the thickness of the die alloy (5) that said die (3) through-hole wall is inlayed is 0.5～1mm.

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