CN203198179U

CN203198179U - Exhaust structure

Info

Publication number: CN203198179U
Application number: CN 201320179664
Authority: CN
Inventors: 符岳衡; 黄扬
Original assignee: Mitac Precision Technology Kunshan Ltd
Current assignee: Mitac Precision Technology Kunshan Ltd
Priority date: 2013-04-11
Filing date: 2013-04-11
Publication date: 2013-09-18
Anticipated expiration: 2023-04-11

Abstract

The utility model discloses an exhaust structure applied to a mould. The exhaust structure comprises a body in which a plurality of exhaust sheet grooves are formed, and exhaust sheets arranged in the exhaust sheet grooves of the body respectively. Compared with the prior art, for the exhaust structure, the exhaust sheets are arranged in the exhaust sheet grooves of the body respectively, so that the accumulated tolerance can not be caused and burrs are prevented from being generated in the production process; meanwhile, the body and the exhaust sheets are adjustable in both length and width, so that the batch production can be achieved, the processing cost can be reduced, and the mould can be conveniently assembled and taken out.

Description

Exhaust structure

[technical field]

The utility model relates to a kind of exhaust structure, is specifically related to a kind of exhaust structure that is applied in the mould.

[background technology]

When injection mo(u)lding plastic parts product, make die cavity produce gas along with the injection of melt plastic cement liquid, this gas mainly comprises: existing air in die cavity and the running gate system, the moisture that contains in the plastic raw materials at high temperature evaporates the steam that produces, the gas that some additive volatilization produces in the gas that plastics produces under the high temperature and the plastics.When injection moulding, if these gases can not from die cavity, discharge in time, then when shaped article these gases can produce pore, gas line, cavity on the surface of product, burn, the great number of issues such as bubble.

At present, mainly be to utilize the exhaust sheet to carry out exhaust in the mould.Please jointly consult Fig. 1, Fig. 2, a kind of exhaust structure schematic diagram, Fig. 2 that Fig. 1 illustrates prior art illustrates the structural representation of the exhaust sheet in Fig. 1 exhaust structure.

The exhaust structure of prior art comprises some exhaust sheets 10 among Fig. 1, and these some exhaust sheets 10 are linked together by the alignment pin (not shown), and finally are fixed in the mould by screw 14.Laterally be provided with the degree of depth on the sheet of exhaust described in Fig. 2 10 and be the first row air drain 11 of 0.5mm and vertically be provided with the second row air drain 12 that the degree of depth is 0.05mm.When injection molding product, gas can be discharged by first row air drain 11 and second row air drain 12, has the dowel hole 13 for alignment pin (not shown) serial connection on the described exhaust sheet 10.

Yet, being connected in series owing to exhaust sheet 10 passes through the alignment pin (not shown) mutually in this exhaust structure, if the machining tolerance of each exhaust sheet 10 is 0.01mm, then in Fig. 1 26 exhaust sheets 10 as example, it is 0.26mm that the rear maximum of serial connection can reach cumulative limit, can not satisfy the required precision of second row air drain 12, thereby cause the problem of overflow in the production process glue and then generation burr.Adopt simultaneously this exhaust structure, in lock screw 14, owing to being comprised of multi-disc exhaust sheet 10, group is bad clamping immediately.

In view of this, be necessary to provide in fact a kind of novel exhaust structure, to solve the problems referred to above in the existing exhaust structure.

[summary of the invention]

Therefore, the purpose of this utility model provides a kind of exhaust structure, and this exhaust structure can solve that above-mentioned cumulative limit is large, easily produce the vertical hard problem of burr and exhaust sheet group in the production process.

In order to achieve the above object, exhaust structure of the present utility model is applied in the mould, and this exhaust structure comprises:

Body has several exhaust film traps on it;

The exhaust sheet is located at respectively in the exhaust film trap of described body.

Optionally, have several screw holes on the described body, described body cooperates screwed lock to be located in the mould by described screw hole.

Optionally, described exhaust structure also has alignment pin, has positional punch on the described body, has locating hole on the described exhaust sheet, and described locating hole is corresponding with described positional punch position, and described alignment pin is arranged in described positional punch and the described locating hole.

Optionally, has hanging platform on the described exhaust sheet.

Optionally, have first row air drain and second row air drain on the described exhaust sheet, described second row air drain is extended by a side of described first row air drain, and the depth dimensions of described first row air drain is greater than the depth dimensions of described second row air drain.

Optionally, the degree of depth of described first row air drain is 0.5mm.

Optionally, the degree of depth of described second row air drain is 0.02mm.

Compared to prior art, exhaust structure of the present utility model, owing to being that each exhaust sheet is located in the exhaust film trap of body, therefore can not cause cumulative limit, avoid producing aborning burr, body and exhaust sheet length and width all can be done adjusted size simultaneously, can realize mass production, cut down finished cost, group is vertical joins mould and takes out all convenient.

[description of drawings]

Fig. 1 illustrates a kind of exhaust structure schematic diagram of prior art.

Fig. 2 illustrates the structural representation of the exhaust sheet in Fig. 1 exhaust structure.

Fig. 3 illustrates the front view of the utility model exhaust structure.

Fig. 4 illustrates the top view of the utility model exhaust structure.

Fig. 5 illustrates the side view of the utility model exhaust structure.

Fig. 6 illustrates the A-A of exhaust sheet among Fig. 4 to cut-away view.

[specific embodiment]

Please jointly consult Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, side view, Fig. 6 that top view, Fig. 5 that front view, Fig. 4 that Fig. 3 illustrates the utility model exhaust structure illustrates the utility model exhaust structure illustrates the utility model exhaust structure illustrate the A-A of exhaust sheet among Fig. 4 to cut-away view.

Body 20 has several exhaust film traps 21 on it;

Exhaust sheet 22 is located at respectively in the exhaust film trap 21 of described body 20.

Compared to prior art, exhaust structure of the present utility model owing to being that each exhaust sheet 22 is located in the exhaust film trap 21 of body 20, therefore can not cause cumulative limit, avoids producing aborning burr; Body 20 and exhaust sheet 22 length and width all can be done adjusted size simultaneously, can realize mass production, cut down finished cost; Moreover since be installed in mold insert (exhaust sheet 22) in the body 20 after, join again mould, therefore group is vertical joins mould and takes out all convenient.

Wherein, have several screw holes 23(on the described body 20 and for example be two herein), described body 20 cooperates screw 24 to be locked in the mould by described screw hole 23.

Wherein, described exhaust structure can also have the alignment pin (not shown), has positional punch 25 on the described body 20, has locating hole 26 on the described exhaust sheet 22, described locating hole 26 is corresponding with described positional punch 25 positions, described alignment pin (not shown) is arranged in described positional punch 25 and the described locating hole 26, thereby reaches the location to described exhaust sheet 22.

Wherein, can also have hanging platform 27 on the described exhaust sheet 22.Thereby it is better fixing to reach described exhaust sheet 22.

Wherein, generally can have first row air drain 28 and second row air drain 29 on the described exhaust sheet 22, described second row air drain 29 is extended by a side of described first row air drain 28, and the depth dimensions of described first row air drain 28 is greater than the depth dimensions of described second row air drain 29.The degree of depth of described second row air drain 29 need to guarantee that generally gas can discharge and can not overflow the fluid that moulding is used.The degree of depth of described first row air drain 28 for example is 0.5mm, and the degree of depth of described second row air drain 29 for example is 0.02mm.

Claims

1. an exhaust structure is applied to it is characterized in that in the mould, and this exhaust structure comprises:

Body has several exhaust film traps on it;

2. exhaust structure as claimed in claim 1 is characterized in that, has several screw holes on the described body, and described body cooperates screwed lock to be located in the mould by described screw hole.

3. exhaust structure as claimed in claim 1, it is characterized in that, described exhaust structure also has alignment pin, has positional punch on the described body, has locating hole on the described exhaust sheet, described locating hole is corresponding with described positional punch position, and described alignment pin is arranged in described positional punch and the described locating hole.

4. exhaust structure as claimed in claim 1 is characterized in that, has hanging platform on the described exhaust sheet.

5. such as each described exhaust structure among the claim 1-4, it is characterized in that, have first row air drain and second row air drain on the described exhaust sheet, described second row air drain is extended by a side of described first row air drain, and the depth dimensions of described first row air drain is greater than the depth dimensions of described second row air drain.

6. exhaust structure as claimed in claim 5 is characterized in that, the degree of depth of described first row air drain is 0.5mm.

7. exhaust structure as claimed in claim 5 is characterized in that, the degree of depth of described second row air drain is 0.02mm.