CN100343034C

CN100343034C - Exhaustive metal die

Info

Publication number: CN100343034C
Application number: CNB2005100375662A
Authority: CN
Inventors: 陈特夫
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-28
Filing date: 2005-09-28
Publication date: 2007-10-17
Anticipated expiration: 2025-09-28
Also published as: CN1743160A

Abstract

The present invention discloses a metal mold with an ability of exhaust. The inner wall of a metal mold cavity has micropore ventilating pieces, miniature exhaust vents or micro-fine exhaust slots, and air is discharged out of the mold cavity from exhaust passages; a closed inner cavity can be arranged, which has the function of clearing powder adhered to the surface of an aeration layer. By adopting the structure, the present invention can easily and directly eliminate air existing in a mold cavity and product raw materials from working surfaces of a metal mold cavity during a forming process of a product, and thereby, the purposes of eliminating defects, improving product quality, increasing productivity and reducing costs can be achieved.

Description

But a kind of metal die of exhaust

Technical field

The present invention relates to the technical field of mould, more specifically saying so a kind ofly is raw material compacting and has the Tool and Die Technology of degassing function with the powder material, is applicable to industries such as powder metallurgy, ceramic, emery wheel manufacturing.

Background technology

Traditional plastics, rubber, pottery and emery wheel goods are subjected in the metal die cavity in the molded process, because a variety of causes, make to be present in the die cavity or the air in the goods powder can not be drained, and cause product defect.Tired gas, ripples line, misrun, burr and pore as plastics, rubber; Phenomenons such as the layering of ceramic, bubble or cracking.Thereby cause product rejection or reduce to substandard products.In order to address this problem, the applicant has applied for that on November 29th, 2002 name is called " but metal die of a kind of exhaust " patent of invention, this application for a patent for invention is to be provided with micro-porous permeable spare or fine exhaust seam at the metal pattern cavity wall, have exhaust trench at coupled place again, communicate with atmosphere by steam vent.Aforesaid way can address the above problem effectively, but in the practice, also has certain defective, and is limited as leaving area, and long-term the use, its air-permeable member is more easily stopped up, and influences product quality, the comparatively complicated trouble of its processing and manufacturing simultaneously and assembling, cost is higher, easily adhesion between product and mould.

Summary of the invention

Purpose of the present invention is exactly the metal die with degassing function that provide for the deficiency that solves prior art a kind of has better permeability, the while is lower-cost and has anti-adhesion effects.

The present invention adopts following technical solution to realize above-mentioned purpose:

But be somebody's turn to do the metal die of exhaust, it comprises die matrix, metal die cavity, is provided with air-permeable member at the metal pattern cavity wall, and this air-permeable member is the non-metallic fibers material air-permeable layer that is arranged on the mold work surface.

The working face back side in non-metallic fibers material air-permeable layer also is provided with the rigidity air permeable plate; Air permeable plate is to be densely covered with the sheet metal or the rigidity organic material that connect aperture to make; The one side that described die matrix contacts with the rigidity air permeable plate has the plurality of rows air flue.

Described exhaust duct communicates with the die matrix external environment condition; Also airtight inner chamber can be set in die matrix, exhaust duct communicates with this airtight inner chamber; Can also be for an airtight container being arranged in exhaust mould outer setting, this container communicates with exhaust duct by pipeline.

Described die matrix medial surface is provided with fine raceway groove or aperture.

The beneficial effect that the present invention adopts above-mentioned technical solution to reach really is: but the mould of this exhaust can be present in the die cavity and the goods raw material in gas in the product molding process, because of the bigger air-permeable layer of area is arranged, directly get rid of at an easy rate, reached the elimination defective and have anti-adhesion effects, improve the quality of products, increase output and reduce cost from the working face of metal die cavity.The fiber air-permeable layer is positioned at the mold work surface, directly contacts with powder.According to need of work, that air-permeable layer can be done is grease proofing, waterproof, antistatic, release treatment.Exhaust duct and airtight inner chamber or outside airtight container are connected, and after the inner chamber product molding shed operating pressure, sealing gas oppositely poured die cavity, can remove the powder that attaches to the air-permeable layer surface; Thereby make fiber air-permeable layer of the present invention be difficult for blockage phenomenon, can not influence product quality.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention 1.

Fig. 2 is the structural representation of the embodiment of the invention 2.

The specific embodiment

Embodiment 1:

By shown in Figure 1, but a kind of metal die of exhaust, and it comprises fiber air-permeable layer 1, rigidity air permeable plate 2, die matrix 3, exhaust duct 4; The gas in the metal die cavity is discharged to the outside of die matrix by the various approach of exhaust duct; Fiber air-permeable layer 1 is positioned at the mold work surface, the reverse side of air-permeable layer 1 working face is provided with rigidity air permeable plate 2, rigidity air permeable plate 2 supports air-permeable layer 1 shape that remains unchanged when work, the another side of rigidity air permeable plate 2 contacts with die matrix 3, die matrix 3 inside are provided with exhaust duct 4, and exhaust duct 4 communicates with die matrix 3 external environment conditions.

Embodiment 2:

As shown in Figure 2, in die matrix, set in advance an airtight inner chamber 5, discharge gas by air-permeable layer 1 when the volume size of inner chamber should guarantee mold work and enter operating pressure when being compressed reaction pressure that the back produces in the airtight inner chamber 5 less than product molding, the connection of air-permeable layer 1, rigidity air permeable plate 2, die matrix 3 is with embodiment 1, and exhaust passage 4 communicates with airtight inner chamber 5.

Embodiment 3:

The difference of present embodiment and embodiment 2 is: closed container of the outer setting of exhaust mould, and the gas of discharging with pipeline and exhaust mould is communicated with, and to substitute the airtight inner chamber 5 of die matrix inside, other are identical with embodiment 2.

As other embodiments of the invention, the present invention can also directly be provided with the composite fibre air-permeable layer on the die matrix working face, fine raceway groove is set on the die matrix medial surface, can be fine aperture also, and rigidity air permeable plate or ventilative groove need be set; Directly absorb gas and bounce pressure, thereby make the dust abscission that attaches on the composite fibre air-permeable layer by fine raceway groove or fine aperture.

Claims

But 1, a kind of metal die of exhaust, it comprises die matrix, metal die cavity, be provided with air-permeable member at the metal pattern cavity wall, this air-permeable member is the non-metallic fibers material air-permeable layer that is arranged on the mold work surface, also is provided with the rigidity air permeable plate at the working face back side of non-metallic fibers material air-permeable layer; Air permeable plate is to be densely covered with the sheet metal or the rigidity organic material that connect aperture to make; The one side that described die matrix contacts with the rigidity air permeable plate has the plurality of rows air flue, it is characterized in that: airtight inner chamber is set in die matrix, exhaust duct communicates with this airtight inner chamber, and exhaust mould outer setting has an airtight container, and this container communicates with exhaust duct by pipeline.
But 2, the metal die of exhaust according to claim 1 is characterized in that: described die matrix medial surface is that non-metallic fibers material air-permeable layer phase-contact surface is provided with fine raceway groove or aperture.