CN219378967U - Forming density adjustable pressurizing die - Google Patents

Abstract

The utility model discloses a compression mold with adjustable molding density, which comprises a female mold, wherein the female mold comprises a matched through hole, the matched through hole is connected with a lower mold in a sliding manner, a floating mold is connected in the matched through hole in a sliding manner, and a compression cavity is formed between the matched through hole and the lower mold as well as between the matched through hole and the floating mold. The utility model provides a compression mold with adjustable molding density, which can control the cavity depth in areas with different heights, so as to fill different amounts of powder, accurately apply different pressurizing forces to the areas with different heights in a product, control the density uniformity among the areas, and form a step structure by matching a floating mold with a lower mold, so that the areas are vertically pressed, and compared with an integral cantilever beam structure, the compression mold has better compression resistance, is relatively independent among the parts, and is convenient to maintain and replace.

Description

Forming density adjustable pressurizing die

Technical Field

The utility model relates to the technical field of magnetic powder core production, in particular to a compression mold with adjustable molding density.

Background

The magnetic powder is mainly alloy powder, and has higher hardness; the powder is approximately spherical, the binding force between the particles is weak, the magnetic powder can be pressed and molded only by the pressure of 1000-2000 MPa, and the pressure impact on the die is extremely large; the density of the metallic magnetic powder core product is very sensitive to the effect of properties, the desired density being obtained between press forming processes, and the subsequent processing steps have no way to increase the density to change the properties. The existing dies on the market mainly adopt integral dies, so that the deep filling amount of a concave die cavity is fixed, more cantilever structures exist in the integral dies, the concave die cantilever is easy to crush when pressurized, the service life of the die is greatly reduced, and the density values among all areas of a product are difficult to be independently adjusted due to the fact that the numerical values of pressurizing force are uniform and a plurality of step structures exist in the concave die, so that the requirement on the precision of the powder placement amount is extremely high, and the production efficiency is low.

For example, publication No. CN213877813U discloses a flexible molding device for preparing a green annular amorphous magnetic powder core, comprising a device body including a lower die and an upper die for pressing a magnetic powder core, the upper die being connected with a precession mechanism for driving the upper die to precess downward; the screwing mechanism comprises a screwing rod fixedly connected with the upper die, a hydraulic rod connected with a hydraulic cylinder in a rotating way through a rotary joint and a rotating assembly for driving the screwing rod to rotate; the rotating assembly comprises a transmission shaft which is connected with the precession rod through a transmission gear set for transmission, and the transmission shaft penetrates through a fixing frame fixedly connected with the hydraulic rod and is in rotating connection with the fixing frame; the transmission shaft is fixedly connected with a sliding block at the tail end, a guide plate is nested in the sliding block, a sliding groove for the sliding block to slide is formed in the guide plate, a rolling gear is fixedly sleeved on the transmission shaft, and a rack matched with the rolling gear is arranged on the inner wall of the sliding groove. However, in practical application, when a product with a step structure is pressed, due to the fact that height difference exists among all areas of the product, when the upper die presses the whole product, powder quantity among all areas is different, density numerical values among all areas cannot be accurately controlled, all pressing forces are concentrated on the lower die, and the step structure in a pressing cavity is easy to crush, so that production is affected.

Disclosure of Invention

Aiming at the problems that the cantilever beam structure of the die cavity of the integral die is easy to crush and the density of each region of a product cannot be accurately controlled in the prior art, the utility model provides the pressurizing die with adjustable molding density, which can control the cavity depth in regions with different heights so as to fill different amounts of powder, can accurately apply different pressurizing forces to the regions with different heights in the product so as to control the uniform density among the regions, and forms a step structure through the cooperation of the floating die and the lower die, so that each region is vertically pressed.

In order to achieve the above purpose, the present utility model adopts the following technical scheme.

The utility model provides a shaping density adjustable pressurization mould, includes the die, the die is including the cooperation through-hole, cooperation through-hole sliding connection has the lower mould, the sliding connection has the floating die in the cooperation through-hole, be formed with adjustable pressurization die cavity between cooperation through-hole and lower mould, the floating die. The lower die and the floating die are respectively connected to different driving devices in the process, and can move independently, so that the upper die and the floating die can be matched with the upper die according to the requirement to generate different pressurizing forces, the heights of the lower die and the floating die can be independently adjusted in the powder placing stage, the quantity of powder which can be placed in the region can be controlled, the density of the region can be controlled in the subsequent pressurizing process, the problem that the integral type adjustable pressurizing cavity can not regulate the density in a segmented mode, and the product is cracked, layered and unstable due to overlarge density difference among the regions is solved.

Preferably, a guide groove is arranged in the matching through hole, a guide key is arranged on the floating die, and the guide key is connected with the guide groove in a clamping way and can slide relatively. The guide way can carry out the relative slip between guide way and the guide key to the guide way provides the direction spacing for the guide key, avoids floating mould production displacement in the cooperation through-hole, and the guide effect that the guide way provided can make the drawing of patterns process more smooth, thereby avoids the product to take place the skew shake and drop.

Preferably, the lower die comprises a plurality of segment dies, and each segment die can independently slide in the matched through hole. The lower die is divided into a plurality of sections of dies, the plurality of sections of dies can independently slide, so that product step structures with different heights can be independently controlled, meanwhile, the plurality of sections of dies are not required to be connected together due to relative independence, the generation of a cantilever beam structure is avoided, each section of dies can independently bear force, the force bearing direction is the vertical direction, and the force bearing effect is good.

Preferably, the floating die is provided with a forming through hole, and the sectional die is sleeved in the forming through hole and can slide relatively. Because the lower die is provided with a plurality of sectional dies, the sectional dies penetrate through forming through holes on the floating die, the floating die can still ensure the flatness of the structure of the lower die when the lower die faces the forming of multi-step products, the corresponding step shape does not appear, and the integral compressive capacity of the floating die is improved.

Preferably, the side wall of the lower die is attached to the floating die and can slide relatively. The lateral wall of lower mould is laminated with the unsteady mould, avoids producing the clearance each other, leads to the pressurization not thoroughly, and the powder drops, simultaneously owing to laminate each other between the two, can carry out relative spacing to cooperate with the cooperation through-hole, thereby make unsteady mould and lower mould slip in the cooperation through-hole can remain stable.

Preferably, the female die is a movable female die, and the movable female die can relatively move up and down with the lower die. Different from the traditional fixed female die, the female die in the scheme is a movable female die, when the floating die, the lower die and the upper die are stationary, the movable female die can move up and down, so that other dies are exposed, after the product is pressurized and formed, the movable female die moves downwards, at the moment, the upper die and the lower die are stationary and continuously fix the formed product, so that the stability of the product is ensured, when the product is completely exposed, the upper die and the floating die can be moved, so that the product taking is more flexible and convenient, the floating die can move along with the movable female die in the downward movement process, the product can be prevented from being pressurized again in the product jacking process by the lower die only by virtue of the movement of the movable female die, and the problem that the upper die and the lower die need to debug synchronous movement rates of the upper die and the lower die in the movement process is avoided, so that the whole process is simpler and stable.

Preferably, the die further comprises an upper die, wherein the cross section shape of the upper die is the same as that of the adjustable pressurized cavity. The integral product is molded by pressurizing the upper die in the die, and the partial molding density is adjusted by locally pressurizing the lower die and the floating die, so that the shape of the upper die is required to be the same as that of the adjustable pressurizing cavity, the upper die can slide in the adjustable pressurizing cavity, and the required pressurizing force is generated, wherein if a plane is arranged in the product, the upper die corresponds to the plane part of the pressurized product, and the step structure of the upper die is avoided, so that the structural strength is reduced.

The beneficial effects of the utility model are as follows:

(1) The lower die and the floating die are separated, so that the local position of a product can be pressurized by independently adjusting the lower die and the floating die on the basis of pressurizing the upper die, and therefore, different filling amounts can be set, different areas can generate different densities, and the overall structural strength of the product is improved;

(2) The lower die and the floating die are separated and can be independently adjusted, so that the existence of a cantilever structure or a step structure of the die is avoided, the compression resistance of a single die is improved, the cost of independent maintenance is lower, the combination of the dies is more flexible, the shape diversity of the adjustable pressurized cavity is realized, and the application range is improved;

(3) The product is separated through the downward movement of the movable female die, so that the product is prevented from being subjected to jacking force again after compression molding, the synchronous rate of the upper die and the lower die in the jacking process is not required to be adjusted, the fixing is kept, the debugging cost is saved, the production efficiency is improved, and the separation stability of the product is ensured.

Drawings

Fig. 1 is an exploded view of the present utility model.

Fig. 2 is a cross-sectional view of the present utility model.

Fig. 3 is a first isometric view of the utility model.

Fig. 4 is a schematic structural view of the female die in example 1.

Fig. 5 is a second isometric view of the utility model.

Fig. 6 is a schematic structural diagram of embodiment 2.

In the figure: the die 1, 11 is matched with the through hole, 12 is guided to be grooved, 13 is moved to be grooved, 2 is lower die, 21 is segmented, 3 is floated, 31 is guided to key, 32 is formed through hole, 4 is adjustable to pressurize the die cavity, 5 is upper die, 6 products.

Detailed Description

The utility model is further described below with reference to the drawings and specific embodiments.

Example 1:

as shown in fig. 1 and 4, a compression mold with adjustable molding density comprises a female mold 1, wherein the female mold 1 comprises a matching through hole 11, the matching through hole 11 is connected with a lower mold 2 in a sliding manner, a floating mold 3 is connected in the matching through hole 11 in a sliding manner, and an adjustable compression cavity 4 is formed between the matching through hole 11 and the lower mold 2 as well as between the matching through hole 11 and the floating mold 3; the side wall of the lower die 2 is attached to the floating die 3 and can slide relatively; the die also comprises an upper die 5, and the cross section shape of the upper die 5 is the same as that of the adjustable pressurizing cavity 4.

The lower die 2 and the floating die 3 which can slide are arranged in the quota and the through hole, the height difference exists between the lower die 2 and the floating die 3, the cavity formed by the through hole 11, the lower die 2 and the floating die 3 is matched with the adjustable pressurized cavity 4, the die also comprises an upper die 5, after powder is placed in the adjustable pressurized cavity 4, the upper die 5 is used for extruding downwards, in the process, the lower die 2 and the floating block are respectively connected on different driving devices and can move independently, therefore, the upper die 5 and the floating block can be matched with the upper die 5 according to the requirement to generate different pressurizing forces, in the powder placing stage, the heights of the lower die 2 and the floating block can be independently adjusted to control the quantity of the powder which can be placed in the region, in the subsequent pressurizing process, the density of the area can be controlled, the problems that the integral adjustable pressurizing cavity 4 cannot adjust the density in a segmented mode, and the product 6 is cracked, layered and unstable in performance due to overlarge density difference among the areas are avoided, meanwhile, after the product 6 is pressed and molded, the upper die 5, the lower die 2 and the floating die 3 are moved upwards to enable the upper die 5, the lower die 2 and the floating die 3 to protrude out of the upper plane of the female die 1, and then the floating die 3 is moved downwards, so that the whole product 6 can be ejected after being molded, the efficiency of taking the product 6 is greatly improved, and the product 6 is always kept in a stable state due to the fact that the upper die 5 and the lower die 2 are continuously fixed in the demolding process; the side wall of the lower die 2 is attached to the floating die 3, so that gaps are avoided, the pressurization is incomplete, powder falls, meanwhile, the two are attached to each other, relative limiting can be performed, and the floating die 3 and the lower die 2 are matched with the matched through hole 11, so that the sliding of the floating die 3 and the lower die 2 in the matched through hole 11 can be kept stable; the integral product 6 is molded by pressurizing the upper die 5, and the partial molding density is adjusted by locally pressurizing the lower die 2 and the floating die 3, so that the shape of the upper die 5 is required to be the same as that of the adjustable pressurizing cavity 4, and the upper die 5 can slide in the adjustable pressurizing cavity 4, so that the required pressurizing force is generated, wherein if a plane is arranged in the product 6, the upper die 5 corresponds to the plane part of the pressurized product 6, and the structural strength reduction caused by the step structure of the upper die 5 is avoided.

As shown in fig. 4 and 5, a guide groove 12 is provided in the mating through hole 11, and a guide key 31 is provided on the floating die 3, and the guide key 31 is engaged with the guide groove 12 and is slidable relative to the guide groove. The guide way 12 and the guide key 31 can slide relatively, the guide way 12 provides direction limitation for the guide key 31, the floating die 3 is prevented from generating displacement in the matched through hole 11, the demolding process can be smoother due to the guide effect provided by the guide way 12, and the product 6 is prevented from being inclined and jittered to fall.

As shown in fig. 2 and 3, the lower die 2 includes three segment dies 21, and each segment die 21 can slide independently in the corresponding through hole 11; the floating die 3 is provided with a forming through hole 32, one of the segmented dies 21 is sleeved in the forming through hole 32 and can slide relatively, and the other two segmented dies are arranged on two sides of the floating die.

The lower die 2 is divided into a plurality of sections of dies, the sections of dies can independently slide, so that the step structures of products 6 with different heights can be independently controlled, meanwhile, the sections of dies are not required to be connected together due to relative independence, the generation of a cantilever beam structure is avoided, each section of dies can independently bear force, the force bearing direction is vertical, the force bearing effect is good, one section of dies 21 penetrates through a forming through hole 32 on the floating die 3, the floating die 3 can be ensured to be still ensured to be smooth in structure when facing the forming of the multi-step product 6, the corresponding step shape is not generated, and the integral compression resistance of the floating die 3 is improved.

The assembly and working process of the pressing mold with adjustable molding density in this embodiment are as follows: in the embodiment, the lower die 2 and the floating die 3 are slidably connected in the female die 1, wherein the lower die 2 corresponds to a convex portion in the product 6, the floating die 3 corresponds to a concave portion in the product 6, therefore, the horizontal position of the lower die 2 is lower than the horizontal position of the floating die 3 in the vertical direction, the lower die 2 comprises three sections of segmented dies 21, two segmented dies 21 are positioned at two sides of the floating die 3, the other segmented dies 21 penetrate through forming through holes 32 of the floating die 3, the die parts can slide relatively, an adjustable pressurizing cavity 4 is formed between the floating die 3 and the lower die 2, during the working process, the position relationship between the segmented dies 21 and the floating die 3 is firstly adjusted, powder is filled in the adjustable pressurizing cavity, the powder in each area is distributed according to the required density after the molding, then the upper die 5 starts to be pressed down, the lower die 2 and the floating die 3 are locally pressurized according to the set density value, thus the density control for the product 6 is realized, the risk of extrusion deformation of the die parts is reduced, after the product 6 is pressurized, the die parts are pressed and the die parts are driven by the lower die 2 and the die 5 is continuously moved in the process of holding the die 6, and the die is continuously moved in the process of holding the die 6.

Example 2:

as shown in fig. 6, unlike in embodiment 1, the female die 1 is a movable female die 13 in this embodiment, and the movable female die 13 can be moved up and down relative to the lower die 2. Unlike the traditional fixed die 1, the die 1 in this scheme is the movable die 13, when the floating die 3, the lower die 2, the upper die 5 is static, the movable die 13 can be moved up and down, thereby make other dies appear, after the product 6 is pressurized and formed, the movable die 13 moves down, at this moment, the upper die 5 and the lower die 2, the floating die 3 is static and continuously fix the formed product 6, the stability of the product 6 is ensured, when the product 6 is all exposed, the upper die 5 and the floating die 3 can be moved, so that the product 6 is more flexible and convenient to take, wherein the floating die 3 can move along with the movable die 13 in the downward movement process of the movable die 13, only the upper die 5 and the lower die 2 are relied on for fixing, the product 6 can be prevented from being pressurized again in the process of lifting the product 6 through the lower die 2, and meanwhile, the problem that the upper die 5 and the lower die 2 need to debug the synchronous movement rate of the two in the movement process is avoided, so that the whole process is simpler and more stable.

In addition to the above embodiments, the technical features of the present utility model may be rearranged and combined within the scope of the claims and the disclosure of the present utility model to form new embodiments, which may be realized by those skilled in the art without inventive effort, and thus, embodiments of the present utility model not described in detail should be considered as embodiments of the present utility model within the scope of the protection of the present utility model.

Claims (7)

1. The utility model provides a shaping density adjustable pressurization mould, its characterized in that, including the die, the die is including the cooperation through-hole, cooperation through-hole sliding connection has the lower mould, cooperation through-hole sliding connection has the floating die, be formed with adjustable pressurization die cavity between cooperation through-hole and lower mould, the floating die.

2. The pressing mold with adjustable molding density according to claim 1, wherein a guide groove is provided in the mating through hole, and a guide key is provided on the floating mold, and the guide key is engaged with the guide groove and is capable of sliding relatively.

3. A compression mold with adjustable molding density as claimed in claim 1, wherein said lower mold comprises a plurality of segmented molds, each of said segmented molds being independently slidable within mating through holes.

4. A pressing die with adjustable molding density according to claim 3, wherein the floating die is provided with a molding through hole, and the segmented die is sleeved in the molding through hole and can slide relatively.

5. The adjustable mold according to claim 1, wherein the side wall of the lower mold is attached to the floating mold and is slidable relative to the floating mold.

6. A compression mold with adjustable molding density according to any one of claims 1-5, wherein the female mold is a movable female mold, and the movable female mold is movable up and down with respect to the lower mold.

7. The adjustable density compression mold of any one of claims 1-5, further comprising an upper mold having a cross-sectional shape that is the same as the shape of the adjustable compression cavity.