CN203448669U

CN203448669U - Forming die used for magnetic powder core

Info

Publication number: CN203448669U
Application number: CN201320417777.9U
Authority: CN
Inventors: 樊旭哲
Original assignee: SHENZHEN POCO MAGNETIC CO Ltd
Current assignee: SHENZHEN POCO MAGNETIC CO Ltd
Priority date: 2013-07-12
Filing date: 2013-07-12
Publication date: 2014-02-26
Anticipated expiration: 2023-07-12

Abstract

The utility model provides a forming die used for a magnetic powder core. The forming die comprises a middle die, an upper punch die and a lower punch die, a middle die hole is formed in the center of the middle die, the upper punch die is inserted into the middle die hole from the upper side of the middle die, the lower punch die is inserted into the middle die hole from the lower side of the middle die, a gap is reserved between the punching face of the upper punch die and the punching face of the lower punch die to form a die cavity, and heating wires are embedded into the middle die and connected to a power supply. The forming die used for the magnetic powder core can effectively improve strength and density of the product and reduce the reject ratio.

Description

Mould for powder core

Technical field

The utility model relates to powder core production application field, relates in particular to a kind of mould for powder core.

Background technology

Powder core can be widely used in the production of the various electronic devices and components such as communication, the energy, auto industry, household appliances, automatically-controlled door control and inductor, wave filter, transformer, inverter, particularly, in the nineties in last century, this new product of Switching Power Supply is used by large-scale popularization.As a kind of good inductance core, on various switch power modules, be widely used as the various inductance elements such as filtering, current stabilization, energy storage.

As Fig. 1, traditional powder core mould is without heating system, the powder of inserting in die cavity is that high pressure is compressing at normal temperatures, there is following problem in this mould: raw meal is at normal temperatures during pressurized, compacting extrudate density is out low, the product strength of producing is poor, lacks type more in handling process, and fraction defective is high.

In Fig. 1: 1 is middle mould; 2 is upper trimming die; 3 is lower punch die; 4 is die cavity.

Utility model content

The purpose of this utility model is to overcome the defect of prior art, the mould for powder core that provide a kind of product strength of compacting high, density is large, fraction defective is few.

The utility model is achieved in that a kind of mould for powder core, comprise middle mould, upper trimming die and lower punch die, described Zhong Mo center has middle nib, described upper trimming die therefrom mould upside inserts in described middle nib, described lower punch die therefrom mould downside inserts in described middle nib, between the stamping surface of described upper trimming die and the stamping surface of described lower punch die, leave space and form die cavity, in described middle mould, be embedded with heater strip, described heater strip is connected to power supply.

Further, described power supply is temperature control power supply.

Further, described middle nib is ring mould hole.

Further, described heater strip is annular-heating silk.

Further, described die cavity is embedded with an annular-heating silk for one week.

The utility model provides a kind of mould for powder core, utilize the raw meal principle that compressing intensity is high when heating, density is large, at middle mould, embed heater strip, by power supply, heater strip is switched on so that heater strip temperature raises, mold heated is arrived to uniform temperature, when inserting powder, powder also can be heated to uniform temperature, and with the object of the compacting that reaches a high temperature, the product strength after moulding is high, density is large, and fraction defective declines.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

The powder core forming die structure schematic diagram that Fig. 1 provides for the utility model background technology;

The structural representation of the mould for powder core that Fig. 2 provides for the utility model embodiment;

The heating wire structure schematic diagram that Fig. 3 provides for the utility model embodiment.

The specific embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.

As Fig. 2, the utility model embodiment provides a kind of mould for powder core, by hydraulic press, carry out die mould, comprise middle mould 100, upper trimming die 200 and lower punch die 300, described Zhong Mo 100 centers have middle mould 100 holes, described upper trimming die 200 therefrom mould 100 upsides inserts in described middle mould 100 holes, described lower punch die 300 therefrom mould 100 downsides inserts in described middle mould 100 holes, between the stamping surface of the stamping surface of described upper trimming die 200 and described lower punch die 300, leave space and form die cavity 400, in described middle mould 100, be embedded with heater strip 500, described heater strip 500 is connected to power supply.The utility model utilizes the raw meal principle that compressing intensity is high when heating, density is large, at middle mould 100, embed heater strip 500, by power supply, heater strip 500 is switched on so that heater strip 500 temperature raise, by mold heated, to uniform temperature, when inserting powder, powder also can be heated to uniform temperature, object with the compacting that reaches a high temperature, product strength after moulding is high, and density is large, and fraction defective declines.

Embodiment at the utility model for the mould of powder core, described power supply is temperature control power supply, use temperature control power supply heater strip 500 can be heated to the temperature of setting and remain unchanged, so that mould keeps constant high temperature, and then make raw meal when compacting, keep constant high temperature, can avoid like this raw meal in when compacting, because temperature is uneven, to cause the problems such as goods internal fissure is too much, improve goods yields.

When the powder core that will suppress is annular, middle mould 100 holes in described middle mould 100 are ring mould hole, corresponding, as Fig. 3, heater strip 500 is also annular-heating silk 600, and annular-heating silk 600 is embedded in middle mould 100, heater strip 500 one end are connected to power supply, preferred embodiment at the utility model for the mould of powder core, for raw meal is heated evenly when compressing, can inlay an annular-heating silk 600 for 400 1 weeks at die cavity.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. the mould for powder core, comprise middle mould, upper trimming die and lower punch die, described Zhong Mo center has middle nib, described upper trimming die therefrom mould upside inserts in described middle nib, described lower punch die therefrom mould downside inserts in described middle nib, leaves space and form die cavity between the stamping surface of described upper trimming die and the stamping surface of described lower punch die, it is characterized in that, in described middle mould, be embedded with heater strip, described heater strip is connected to power supply.

2. the mould for powder core as claimed in claim 1, is characterized in that: described power supply is temperature control power supply.

3. the mould for powder core as claimed in claim 1, is characterized in that: described middle nib is ring mould hole.

4. the mould for powder core as claimed in claim 3, is characterized in that: described heater strip is annular-heating silk.

5. the mould for powder core as claimed in claim 4, is characterized in that: described die cavity is embedded with an annular-heating silk for one week.