CN215551212U

CN215551212U - Mould of square graphite crucible in four holes

Info

Publication number: CN215551212U
Application number: CN202120957637.5U
Authority: CN
Inventors: 刘洋; 赵长青; 常建伟; 霍红旗
Original assignee: Wuzhi Hongqiao Carbon LLC
Current assignee: Wuzhi Hongqiao Carbon LLC
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2022-01-18
Anticipated expiration: 2031-05-06

Abstract

The utility model relates to the technical field of graphite crucible manufacturing, and provides a graphite crucible manufacturing device which comprises an upper die and a lower die, wherein the lower die is provided with a cavity; the upper die comprises an upper die plate, an insert, four die cores and a pressing plate, wherein the insert is fixedly arranged on the lower surface of the upper die plate, and the contour of the insert is matched with the inner contour of the cavity; the four die cores are arranged on the insert, and the length between the four die cores and the insert can be adjusted; the pressing plate is movably sleeved on the insert and is elastically connected with the lower surface of the upper die plate, and the upper surface of the lower die is provided with a plane matched with the pressing plate; the center of the upper plane of the upper template is fixedly provided with a die handle, and two guide mechanisms are arranged between the upper template and the lower die. The device has the advantages of simple and reasonable structure, difficult material overflow in the extrusion process, high density of the formed blank body and no defect.

Description

Mould of square graphite crucible in four holes

Technical Field

The utility model relates to the technical field of graphite crucible manufacturing, in particular to a mold of a square graphite crucible with four holes.

Background

The graphite crucible has good thermal conductivity and high temperature resistance, and has small thermal expansion coefficient and certain strain resistance to rapid heating and rapid cooling in the high-temperature use process. Has strong corrosion resistance to acid and alkaline solutions and excellent chemical stability. The graphite crucible has the excellent performance, so the graphite crucible is widely used for smelting alloy tool steel and smelting non-ferrous metals and alloys thereof in the industrial departments of metallurgy, casting, machinery, chemical industry and the like.

The traditional graphite crucible is generally a cylindrical cavity, and the forming method is generally hand molding or spinning forming. The square graphite crucible with four holes is in the shape of a special-shaped graphite crucible with four square cavities, a blank manufactured by adopting a traditional hand molding method is low in density and unstable in quality, the rate of finished products of the square graphite crucible with four holes is seriously influenced, and the service life of the square graphite crucible with four holes is seriously influenced, but the spinning forming method is not suitable for the square graphite crucible with four holes.

At present, a square graphite crucible with four holes is mainly processed by adopting an extrusion molding method, the extrusion molding method mainly adopts a mold for molding, a traditional extrusion mold generally comprises an upper mold and a lower mold, the upper mold is provided with a mold core, the lower mold is provided with a cavity, the upper mold is connected to a pressure head of a press, before processing, a graphite crucible raw material is placed in the cavity, and the mold core descends to be matched with the cavity for extruding the raw material, so that the molding of a blank is realized; the cross-shaped partition is arranged in the square graphite crucible with four holes, so that the requirement on the compactness of the blank is high; the last mould of square graphite crucible in four holes needs four cores, it is when cooperating with the lower mould die cavity, extrude graphite crucible raw materials, graphite crucible raw materials first step is not carried out the compactness and compresses, but is extruded to both sides by the core earlier, the raw materials is extruded from the lower mould edge very easily, when leading to last lower mould compound die, inside raw materials is not enough, lead to fashioned square graphite crucible idiosome density ratio lower, finally lead to the square graphite crucible in four holes that final sintering formed intensity low, the defect is many, short service life.

In addition, the requirements on the cavity depth of the graphite crucible are different at present according to different use scenes, and the current treatment scheme mainly carries out production by repeated die opening, so that the cost is high and the utilization rate is low.

Therefore, a forming mold for a square graphite crucible with four holes is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a die for a square graphite crucible with four holes, which aims to solve the problems in the background technology.

In order to achieve the purpose, the utility model adopts the following technical scheme: a mold of a square graphite crucible with four holes comprises an upper mold and a lower mold, wherein the lower mold is provided with a cavity; the upper die comprises an upper die plate, an insert, four die cores and a pressing plate, wherein the insert is fixedly arranged on the lower surface of the upper die plate, and the contour of the insert is matched with the inner contour of the cavity; the four die cores are arranged on the insert, and the length between the four die cores and the insert can be adjusted; the pressing plate is movably sleeved on the insert and is elastically connected with the lower surface of the upper die plate, and the upper surface of the lower die is provided with a plane matched with the pressing plate; the center of the upper plane of the upper template is fixedly provided with a die handle, and two guide mechanisms are arranged between the upper template and the lower die.

Preferably, the guide mechanism comprises a guide post and a guide post hole matched with the guide post; the guide posts of the two guide mechanisms are arranged on two sides of the upper surface of the lower die in a non-centrosymmetric manner, and the guide post holes are arranged on the upper die plate.

Preferably, the insert is provided with mounting blind holes with the same number as the mold core, the inner contour of the mounting blind holes is matched with the outer contour of the mold core, the mold core part is arranged in the mounting blind holes, the bottom of the mold core is fixedly connected with the upper template and the insert through bolts, and a rigid or elastic adjusting block is sleeved on a bolt body between the upper end part of the mold core and the inner bottom of the mounting blind holes.

Preferably, the pressing plate is movably connected with the upper template through a limiting bolt, and a spring is sleeved on a bolt body between the pressing plate and the upper template.

The working principle of this application does: the lower die is arranged on a workbench of a press, a die shank of an upper die is fixedly connected with a press head of the press, a designed amount of graphite crucible raw material is put into a lower die cavity, the upper die moves towards the lower die along a guide mechanism under the driving of the press head, a pressing plate presses the upper surface of the lower die firstly, a core contacts the graphite crucible raw material and extrudes the graphite crucible raw material, when the graphite crucible raw material is extruded upwards, the pressing plate blocks the raw material from overflowing, an insert and the core continue to extrude the raw material downwards, the edge of the insert is in contact sealing with the inner side edge of the pressing plate to further prevent the raw material from overflowing, meanwhile, the surface of the insert and the core continue to extrude the raw material downwards, and finally the press moves to a set stroke to complete the extrusion of the raw material, so that the forming of a square graphite crucible blank with four holes is realized.

When the depth of the cavity of the graphite crucible needs to be adjusted, the mold core can be detached, the rigid or elastic adjusting block is replaced by the adjusting block with different thickness or elastic strength, and the length of the part, exposed out of the insert, of the mold core can be achieved through fastening of the bolt, so that the adjustment of the depth of the cavity of the square graphite crucible with the four holes finally is achieved.

The device has the advantages of simple and reasonable structure, difficult material overflow in the extrusion process, high density of the formed blank body and no defect.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic view of an opening structure of the upper mold in fig. 1.

Fig. 3 is a top view of fig. 1.

Fig. 4 is a bottom view of the upper die of fig. 1.

Fig. 5 is a top view of the lower die of fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the following description of embodiments thereof, which is provided for helping those skilled in the art to more fully, accurately and deeply understand the concept and technical scheme of the present invention and to facilitate the implementation thereof.

Example 1

Referring to fig. 1 to 5, the mold for the square graphite crucible with four holes comprises an upper mold 1 and a lower mold 2, wherein the lower mold is provided with a cavity 201; the upper die 1 comprises an upper die plate 101, an insert 102, four die cores 103 and a pressure plate 104, wherein the insert is fixedly arranged on the lower surface of the upper die plate, and the contour of the insert is matched with the inner contour of a cavity; the four die cores are arranged on the insert, and the length between the four die cores and the insert can be adjusted; the pressing plate is movably sleeved on the insert and is elastically connected with the lower surface of the upper die plate, and the upper surface of the lower die is provided with a plane matched with the pressing plate; the center of the upper plane of the upper template is fixedly provided with a template handle 3, and two guide mechanisms 4 are arranged between the upper template and the lower template.

Specifically, the guide mechanism comprises a guide post 401 and a guide post hole 402 matched with the guide post; the guide posts of the two guide mechanisms are arranged on two sides of the upper surface of the lower die in a non-centrosymmetric manner, and the guide post holes are arranged on the upper die plate.

Specifically, the insert 102 is provided with mounting blind holes 1021 with the same number as the number of the mold cores, the inner contour of the mounting blind holes is matched with the outer contour of the mold core, the mold core part is arranged in the mounting blind holes, the bottom of the mold core is fixedly connected with the upper mold plate and the insert through bolts 1022, and a bolt body between the upper end part of the mold core and the inner bottom of the mounting blind hole is sleeved with a spring elastic adjusting block 1023.

Specifically, the pressing plate is movably connected with the upper die plate through a limiting bolt 5, and a spring 6 is sleeved on a bolt body between the pressing plate and the upper die plate.

The utility model is described above with reference to the accompanying drawings as an example, in so far as it is a insubstantial improvement in the method concept and technical solutions of the utility model; the present invention is not limited to the above embodiments, and can be modified in various ways.

Claims

1. The utility model provides a mould of square graphite crucible in four holes, includes mould and lower mould, its characterized in that: the lower die is provided with a cavity; the upper die comprises an upper die plate, an insert, four die cores and a pressing plate, wherein the insert is fixedly arranged on the lower surface of the upper die plate, and the contour of the insert is matched with the inner contour of the cavity; the four die cores are arranged on the insert, and the length between the four die cores and the insert can be adjusted; the pressing plate is movably sleeved on the insert and is elastically connected with the lower surface of the upper die plate, and the upper surface of the lower die is provided with a plane matched with the pressing plate; the center of the upper plane of the upper template is fixedly provided with a die handle, and two guide mechanisms are arranged between the upper template and the lower die.

2. The mold of a square graphite crucible with four holes as claimed in claim 1, wherein: the guide mechanism comprises a guide post and a guide post hole matched with the guide post; the guide posts of the two guide mechanisms are arranged on two sides of the upper surface of the lower die in a non-centrosymmetric manner, and the guide post holes are arranged on the upper die plate.

3. The mold of a square graphite crucible with four holes as claimed in claim 2, wherein: the insert is provided with mounting blind holes with the same number as the mold core, the inner contour of the mounting blind holes is matched with the outer contour of the mold core, the mold core part is arranged in the mounting blind holes, the bottom of the mold core is fixedly connected with the upper template and the insert through bolts, and a rigid or elastic adjusting block is sleeved on a bolt body between the upper end part of the mold core and the inner bottom of the mounting blind holes.

4. The mold of a square graphite crucible with four holes as claimed in claim 3, wherein: the pressing plate is movably connected with the upper die plate through a limiting bolt, and a spring is sleeved on the bolt body between the pressing plate and the upper die plate.