CN204095074U

CN204095074U - The exhaust apparatus of injection mold

Info

Publication number: CN204095074U
Application number: CN201420546650.1U
Authority: CN
Inventors: 王伟明
Original assignee: SHENZHEN XINHAOYUAN ELECTRONIC & TECHNOLOGY INDUSTRIAL Co Ltd
Current assignee: Shenzhen Xinhaoyuan Precision Technology Co ltd
Priority date: 2014-09-23
Filing date: 2014-09-23
Publication date: 2015-01-14
Anticipated expiration: 2024-09-23

Abstract

The utility model discloses a kind of exhaust apparatus of injection mold, the core comprising cavity plate, moving platen and be contained on described moving platen, wherein, the top of described core has groove, be inlaid with sintering metal block inside described groove, inside described core, be positioned at immediately below described sintering metal block and have first row pore, the bottom of described first row pore has first row air drain, and described first row pore and described first row air drain are mutually vertical in the axial direction.Implement the utility model and there is following beneficial effect: inside core, inlay sintering metal block, do not take up room in addition while smooth Exhaust Gas, mould structure is compacter, exhaust is reliable rapidly, can injection pressure be reduced, reduce the shaping and dwell time, eliminate product internal stress, prevent deformation of products, also can not impact part strength.

Description

The exhaust apparatus of injection mold

Technical field

The utility model relates to the technical field of injection mold, relates in particular to a kind of exhaust apparatus of injection mold.

Background technology

Due to closely cooperating of mold parting surface, almost form vacuum structure, very large pretightening force is subject to when die sinking, cause die sinking difficulty, in addition in the gas produced due to moulding material high temperature and mold cavity, fast poly-pressure can cause burning, current mark, lack material, the phenomenons such as air-breathing, cause the defects such as part deformation, and prior art utilizes thimble usually, mold inserts etc. are exhausted, these exhaust structures cannot provide enough surf zones to hold issuable a large amount of gas, can only be used for discharging small amounts of gases, if increase their gap, then easily cause flash phenomena, affect product appearance, and can detail rigidity be reduced, have influence on production.

Utility model content

The purpose of this utility model is, for the problems referred to above, provides a kind of and can discharge rapidly a large amount of gas and be easy to the exhaust apparatus of injection mold changed.

For achieving the above object, the utility model adopts following technical scheme:

A kind of exhaust apparatus of injection mold, the core comprising cavity plate, moving platen and be contained on described moving platen, wherein, the top of described core has groove, be inlaid with sintering metal block inside described groove, inside described core, be positioned at immediately below described sintering metal block and have first row pore, the bottom of described first row pore has first row air drain, and described first row pore and described first row air drain are mutually vertical in the axial direction.

Further, the cross-sectional area of described first row pore is less than the cross-sectional area of described first row air drain.

Further, also comprise one-level runner, the cold slug well end of described one-level runner is connected with second row pore, and the end of described second row pore is also connected with second row air drain, and the cross-sectional area of described second row pore is less than the cross-sectional area of described second row air drain.

Implement the utility model and there is following beneficial effect: owing to being inlay sintering metal block inside core, do not take up room in addition, make the mould features compact structure, the good permeability of sintering metal block, a large amount of gases produced when can discharge rapidly stream filling, thus reduction injection pressure, reduce the shaping and dwell time, eliminate product internal stress, prevent deformation of products, its exhaust effect is obvious, also can not impact part strength.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the upward view of the utility model cavity plate.

In figure: 1, cavity plate; 2, moving platen; 3, core; 4, sintering metal block; 5, first row pore; 6, first row air drain; 7, one-level runner; 8, second row pore; 9, second row air drain.

Detailed description of the invention

Detailed description of the invention of the present utility model is described in detail below in conjunction with accompanying drawing.

As shown in Figure 1, a kind of exhaust apparatus of injection mold, comprise cavity plate 1, moving platen 2, core 3 and the one-level runner 7 shown in Fig. 2, core 3 is contained on moving platen 2, the end of one-level runner 7 is cold slug well, plastics can by the gas extrusion in runner in cold slug well and die cavity in stowing operation, simultaneously own with air in filler, stoped plastic flow to not produce atmospheric pressure and affected plastic outward appearance, the end of cold slug well has aperture, form the passage parallel with one-level runner 7, i.e. second row pore 8, the cross section size of second row pore 8 is less than the overflow edge value of plastics, if cuboid, its degree of depth should between 0.01mm to 0.02mm, length is at 3mm to 5mm, width is also between 3 to 5mm, material specifically used according to plastic carries out value, in order to gas is drawn outside mould smoothly, second row pore 8 end also offers the cross-sectional area second row air drain 9 larger than it, the length of second row air drain 9 extends to form boundary, gas enters second row pore 8 from cold slug well, then discharge through second row air drain 9.For the mould with more multi-stage diffluence road, this kind of mode can be adopted equally to be exhausted at runner cold slug well end, sprue then utilizes the gap between sprue puller and template to be exhausted.

The top of core 3 has groove, and sintering metal block 4 is embedded in inside this groove.Sintering metal block 4 adopts a kind of metal material with pore structure to make, to die venting, there is good effect, be arranged on the position that plastic vent ratio is more difficult, inlay into for inside the core 3 of this plastic shaping, do not take up room in addition, mould structure is compacter, the first row pore 5 for being vented is offered in its below, first row pore 5 runs through core 3, bottom it, namely the position contacted with core plate has the first row air drain 6 of horizontal direction, to while extend to form boundary, the cross-sectional area of first row pore 5 is less than the cross-sectional area of first row air drain 6, both are orthogonal in the axial direction.The replacing of sintering metal block 4 is also very simple, only needs again to inlay one piece of same entering, and cleans under available cleaning agent drenches from top to bottom at ordinary times, avoids the hole between plastics blocking sintering metal block 4.Due to the contact surface of cavity plate 1 and moving platen 2, namely have space between die joint, partial air also can along this space Natural excrement.

Wherein, the shape of cross section of first row pore 5, first row air drain 6, second row pore 8 and second row air drain 9 can be any one in rectangle, square, trapezoidal, circular and ellipse.

The utility model is not limited to above-mentioned detailed description of the invention; anyone can draw other various forms of products under enlightenment of the present utility model; above-mentioned detailed description of the invention is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, also can make a lot of form, these all belong within protection of the present utility model.

Claims

1. the exhaust apparatus of an injection mold, the core (3) comprising cavity plate (1), moving platen (2) and be contained on described moving platen (2), it is characterized in that: the top of described core (3) has groove, sintering metal block (4) is inlaid with inside described groove, described core (3) the inside, be positioned at immediately below described sintering metal block (4) and have first row pore (5), the bottom of described first row pore (5) has first row air drain (6), and described first row pore (5) and described first row air drain (6) are mutually vertical in the axial direction.

2. the exhaust apparatus of injection mold according to claim 1, is characterized in that: the cross-sectional area of described first row pore (5) is less than the cross-sectional area of described first row air drain (6).

3. the exhaust apparatus of injection mold according to claim 1, it is characterized in that: also comprise one-level runner (7), the cold slug well end of described one-level runner (7) is connected with second row pore (8), the end of described second row pore (8) is also connected with second row air drain (9), and the cross-sectional area of described second row pore (8) is less than the cross-sectional area of described second row air drain (9).