CN218361641U

CN218361641U - Door frame type powder metallurgy injection molding product sintering back extrusion shaping die

Info

Publication number: CN218361641U
Application number: CN202222475120.XU
Authority: CN
Inventors: 张克峰; 焦春; 刘大业
Original assignee: Hangzhou Zhijian Technology Co ltd
Current assignee: Hangzhou Zhijian Technology Co ltd
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-01-24
Anticipated expiration: 2032-09-19

Abstract

A door frame type powder metallurgy injection molding product sintering back extrusion shaping mold belongs to the technical field of powder metallurgy injection molding product shaping molds. The device comprises an upper die assembly, a lower die assembly, a push plate assembly, an upper die fixing plate and a lower die fixing plate; the upper die assembly comprises an upper die plate and an upper die core arranged on the upper die plate, and a group of upper extrusion assemblies are arranged in the upper die core and are arranged on an upper die fixing plate; the lower die component comprises a lower die plate and a lower die core arranged on the lower die plate, and a group of lower extrusion components corresponding to the upper extrusion components are arranged in the lower die core. The shaping space formed between the die cavity of the die core and the insert core rod of the utility model is based on the shape of the inner hole of the product and the shape of the outer side of the product, and can shape the outline shapes of the inner side and the outer side of the product; meanwhile, the upper end face and the lower end face of the product are pressed by matching with end face extrusion between the upper insert and the lower insert, and the two end faces and the thickness of the product are shaped; and further realize the synchronous shaping operation of the product in all directions and sizes.

Description

Door frame type powder metallurgy injection molding product sintering back extrusion shaping die

Technical Field

The utility model belongs to the technical field of powder metallurgy injection moulding product plastic mould, concretely relates to door frame type powder metallurgy injection moulding product sintering back extrusion plastic mould.

Background

The metal powder injection molding technology MIM is a novel powder metallurgy molding technology formed by introducing the modern plastic injection molding technology into the field of powder metallurgy. The mould can be used for injection molding of blanks and rapidly manufacturing structural parts with high density, high precision and three-dimensional complex shapes through sintering, so that the design concept can be rapidly and accurately materialized into products with certain structural and functional characteristics, and the parts can be directly produced in batches.

The door frame type powder metallurgy injection molding product is easy to deform in size after sintering due to structural characteristics, and the deformed product needs to be shaped; the shaping operation is respectively carried out on the outer frame, the inner hole or the plane by adopting a step-by-step shaping mode in the shaping production of the workshop at present, the transportation turnover of products is increased and the processing period is prolonged by adopting the existing production mode; the structure that sets up slider all around is also adopted to carry out synchronous plastic, but the plastic size of this scheme can't be accurate assurance, and the yield is low, stability is relatively poor.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem that exists among the prior art, the utility model aims to provide a door frame powder metallurgy injection moulding product sintering back extrusion plastic mould, it can the synchronous plastic of multi-direction size, operating stability is good, the precision is high.

The utility model provides a following technical scheme:

a door frame type powder metallurgy injection molding product extrusion shaping die after sintering sequentially comprises an upper die fixing plate, an upper die assembly, a lower die assembly, a push plate assembly and a lower die fixing plate from top to bottom;

the upper die assembly comprises an upper die plate and an upper die core arranged on the upper die plate, a group of upper extrusion assemblies are arranged in the upper die core, and the upper extrusion assemblies are arranged on an upper die fixing plate and comprise upper pressing rods and upper inserts sleeved on the outer sides of the upper pressing rods;

the lower die assembly comprises a lower die plate and a lower die core arranged on the lower die plate, a group of lower extrusion assemblies corresponding to the upper extrusion assemblies are arranged in the lower die core, and each lower extrusion assembly comprises a core insert rod and a lower insert sleeved on the outer side of the core insert rod; a product cavity is arranged on the lower die core, and a shaping space is formed between the product cavity and the upper end part of the insert core rod; the push plate assembly comprises a group of push pipes which are sleeved on the outer side of the lower insert and driven by an external driving piece.

Furthermore, the upper die core is provided with a through hole for the upper extrusion assembly to pass through, and the size of the upper die core hole is smaller than the overall size of the product.

Furthermore, the size of the inner cavity of the product cavity is matched with the overall size of the product, and a guide structure is arranged at the upper end of the inner cavity of the lower mold core.

Furthermore, the overall dimension of the core inserting rod is matched with the dimension of an inner hole of a product, and the upper end part of the core inserting rod is provided with a guide structure.

Furthermore, the lower part of the mandrel bar is provided with a guide pipe and a support rod, the mandrel bar, the guide pipe and the support rod are fixedly connected to form a whole, and the guide pipe is sleeved on the outer sides of the mandrel bar and the support rod and used for movably guiding the push pipe.

Furthermore, the upper die core, the upper insert, the lower die core, the lower insert and the guide pipe are all installed in a limiting mode through limiting rods.

Furthermore, the push plate assembly further comprises a push plate top plate and a bottom plate, the lower insert is mounted on the push plate top plate, and the push plate top plate is provided with a limiting block, a group of guide rods and a buffer spring sleeved on the guide rods.

Further, the lower mould fixed plate is installed on the equipment base, and its below is equipped with the external driving piece that is used for jacking push pedal bottom plate, is equipped with the via hole that the external driving piece of being convenient for passes through on the lower mould fixed plate.

Through adopting above-mentioned technique, compare with prior art, the beneficial effects of the utility model are as follows:

1) In the utility model, the shaping space formed between the product cavity on the lower die core and the insert core rod can be used for shaping the outline shapes of the inner side and the outer side of the product based on the shape of the product cavity on the lower die core and the shape of the outer side of the insert core rod; and simultaneously, the upper end surface and the lower end surface of the product and the thickness of the product are reshaped by matching with the end surface extrusion between the upper insert and the lower insert; further realizing the synchronous shaping operation of the product in all directions and sizes;

2) In the utility model, the guiding structure is arranged at the upper end of the inner cavity of the product cavity on the lower die core and the upper end of the plunger rod, so that the product can conveniently enter the shaping space through preliminary positioning, prepressing and extruding;

3) The utility model discloses in, can carry out spacing installation fast to last mould benevolence, last mold insert, lower mould benevolence, lower mold insert and stand pipe through the gag lever post that sets up, improve the efficiency of installation and dismantlement effectively.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic view of the lower mold insert of the present invention;

fig. 5 is a schematic structural view of the stop lever according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments of the specification. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in order to provide a better understanding of the present invention to the public, certain specific details are set forth in the following detailed description of the invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.

Referring to fig. 1-5, a door frame type powder metallurgy injection molding product extrusion shaping mold after sintering is mounted and fixed on a hydraulic press, and comprises an upper mold fixing plate 6, an upper mold assembly 1, a lower mold assembly 2, a push plate assembly 3 and a lower mold fixing plate 4 from top to bottom in sequence.

Specifically, the upper mold assembly 1 is mounted on the upper mold fixing plate 6, and includes an upper mold plate 101, an upper mold core 102, and a set of upper extrusion assemblies. The upper mold core 102 is disposed on the upper mold plate 101, and a set of through holes is formed thereon, through which the upper extrusion assembly penetrates the upper mold core 102. The upper extrusion assembly comprises an upper pressing rod 103 and an upper insert 104, the upper pressing rod 103 is fixedly installed on the upper die fixing plate 101 through a screw, and the upper insert 104 is sleeved on the outer side of the upper pressing rod 103 and is installed on the upper die plate in a limiting mode through a limiting rod 5.

Specifically, the lower mold assembly 2 includes a lower mold plate 201, a lower mold core 202 and a lower extrusion assembly. The lower mold core 202 is disposed on the lower mold plate 201, and a set of through holes is formed thereon, through which the lower extrusion assembly penetrates the lower mold core 202. The lower extrusion assembly comprises a plug rod 203 and a lower insert 204, and the lower insert 204 is sleeved on the outer side of the plug rod 203; the lower end of the inserting core rod 203 is provided with a support rod 207, the outer side of the support rod 207 is sleeved with a guide tube 206, the lower end of the guide tube 206 is limited and installed on the lower die fixing plate 4 through a limiting rod 5, and the upper end of the guide tube is connected with the inserting core rod 203.

Wherein, the lower mold core 202 is provided with a product cavity 205, when a product is shaped, in a shaping space formed between the product cavity 205 and the upper end part of the insertion core rod 203, the upper end of the inner cavity of the product cavity 205 is provided with an inclined guide structure, and the size of the inner cavity is matched with the external dimension of the product. Meanwhile, the external dimension of the mortise rod 203 is matched with the inner hole dimension of a product, and the upper end part of the mortise rod 203 is also provided with an inclined guide structure.

Specifically, the push plate assembly 3 includes a push plate top plate 301 and a bottom plate 306, and the push plate top plate 301 is arranged on the bottom plate 306; the push plate top plate 301 is provided with a group of push pipes 302, a limit block 303, a guide rod 304 and a buffer spring 305 sleeved on the guide rod 304. The bottom plate 306 is driven by a lower cylinder of the hydraulic press, and a push rod of the lower cylinder pushes the bottom plate 306 to drive the whole push plate assembly 3 to lift. The limiting block 303 is used for limiting the rising position of the push plate top plate 301; the guide rod 304 provides a guide for the lifting of the push plate top plate 301.

Specifically, the upper part of the push tube 302 is connected with the lower insert 204 in a limiting manner through a limiting rod 5, and the lower part of the push tube is connected with the push plate top plate 301 in a limiting manner through the limiting rod 5.

The working process of the utility model is as follows:

clamping and fixing the shaping die on a hydraulic press, and controlling the hydraulic press to open the die; placing a product at a guide structure of the lower mold plunger rod 203 according to a designed direction, pre-pressing the product by the upper mold core 102 in a mold pressing and closing process, then, continuously pressing the upper mold insert 104 downwards to completely extrude the product downwards into a shaping space between the plunger rod 203 and the product cavity 205, and at the moment, wrapping the outer frame of the product by the product cavity 205; the upper and lower inserts limit the thickness of the product to correct the upper and lower surfaces of the warped product, the press drives the die to open the die again after the die-closing pressure of the press is kept for a set time, the upper die rises to a set safe distance, the push rod of the lower cylinder of the press pushes the push plate assembly 3 upwards to drive the push pipe 302 in the push plate assembly 3 to push the product, and the limit block 303 on the push plate top plate 301 limits the push height to ensure that the product is just demoulded.

The inner cavity of the product is extruded by the plug rod 203, the shape is extruded by the profiled product cavity 205, the upper end is pressed by the planes of the upper insert and the lower insert, the deformation of the product is corrected to reach the required size, and the stability of the product size shaping is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. A door frame type powder metallurgy injection molding product extrusion shaping die after sintering sequentially comprises an upper die fixing plate, an upper die assembly, a lower die assembly, a push plate assembly and a lower die fixing plate from top to bottom;

the method is characterized in that: the upper die assembly comprises an upper die plate and an upper die core arranged on the upper die plate, a group of upper extrusion assemblies are arranged in the upper die core, and the upper extrusion assemblies are arranged on an upper die fixing plate and comprise upper pressing rods and upper inserts sleeved on the outer sides of the upper pressing rods;

2. The die for extrusion and reshaping of the sintered door frame type powder metallurgy injection molding product as claimed in claim 1, wherein the upper die core is provided with a hole for positioning and guiding the upper extrusion assembly, and the size of the hole in the upper die core is smaller than the external dimension of the product.

3. The die for extrusion and reshaping of the sintered door frame type powder metallurgy injection molding product according to claim 2, wherein the size of the inner cavity of the product cavity is matched with the external size of the product, and the upper end of the inner cavity is provided with a guide structure.

4. The die for extrusion and reshaping of the sintered door frame type powder metallurgy injection molding product according to claim 3, wherein the outer dimension of the plug core rod is matched with the inner bore dimension of the product, and the upper end of the plug core rod is provided with a guide structure.

5. The sintered door frame type powder metallurgy injection molding product extrusion shaping die according to claim 4, wherein the guide tube and the support rod are arranged at the lower part of the mandrel rod, the guide tube and the support rod are fixedly connected to form a whole, and the guide tube is sleeved at the outer side of the mandrel rod and the support rod and used for movably guiding the push tube.

6. The die for extrusion and reshaping of the sintered door frame type powder metallurgy injection molding product according to claim 5, wherein the upper die core, the upper insert, the lower die core, the lower insert and the guide pipe are all installed in a limiting manner through limiting rods.

7. The die for squeezing and shaping the sintered door frame type powder metallurgy injection-molded product according to claim 6, wherein the push plate assembly further comprises a push plate top plate and a bottom plate, the lower insert is mounted on the push plate top plate, and the push plate top plate is provided with a limiting block, a group of guide rods and a buffer spring sleeved on the guide rods.

8. The sintered door frame type powder metallurgy injection molding product extrusion shaping mold according to claim 4, wherein the lower mold fixing plate is installed on an equipment base, an external driving piece used for jacking the push plate bottom plate is arranged below the lower mold fixing plate, and a through hole through which the external driving piece can pass is formed in the lower mold fixing plate conveniently.