CN201320826Y

CN201320826Y - Improved die

Info

Publication number: CN201320826Y
Application number: CNU2008201827083U
Authority: CN
Inventors: 郑光能
Original assignee: Zhongshan Longcheng Daily Products Co Ltd
Current assignee: Zhongshan Longcheng Daily Products Co Ltd
Priority date: 2008-12-23
Filing date: 2008-12-23
Publication date: 2009-10-07
Anticipated expiration: 2018-12-23

Abstract

The utility model discloses an improved plastic injection forming die comprising a die body, wherein an air channel which is corresponding to a die nest and the position of a material way is arranged inside the die body, at least one venting push-out bolt is arranged on an outlet end in an inlaid mode, a middle sleeve thereof is connected with the air venting bolt and is connected with an air pushing piston, a vacuum blowing dividing valve which is traversed through a seat hole is arranged in a seat body, a joint piece is connected on the inner side of the seat body and is connected with the inlet end, and a pin joint piece is arranged on the external side. Under the state of die matching, air in the die and melting plastic gas can be pumped out by the vacuum blowing dividing valve, high-pressure air blown by the vacuum blowing dividing valve can prompt the venting bolt to be pushed out through the air channel, thereby the die of the utility model has the functions of pumping vacuum air and assisting for demold, can effectively reduce the injection forming time and also can improve the quality of plastic products.

Description

A kind of improved mould

Technical field

The utility model relates to a kind of mould, particularly relates to the improved plastics ejection shaping die that a kind of inside is provided with gas passage.

Background technology

The quality of plastics ejection shaping die has often determined the quality of plastic products.Along with the development trend of product " light, thin, short, little ", make mould also change development to so-called " precision die ".In the process of ejection formation, penetrate quality for avoiding the extraneous factor influence, for example form hole at product surface, perhaps produce bubble in inside, traditional practice is that plastic grain is carried out freeze drying or vacuum dehumidifying, to remove the moisture content in the material.But, hole or bubble removal that this method still can't be effectively, thereby effect and not obvious with product.Trace it to its cause, be because in the forming process of plastic grain, it is inner just to have included gas or moisture content, so this plastic grain is when melting in the heating part of Jet forming machine, gas can be present in the form of bubble in the plastics feed liquid of fusion, can't remove.Therefore, in injecting mould after, still can in product, form hole or bubble, this is the problem that need overcome.

In addition, traditional mould adopts the vapour-pressure type knock pin as demolding assistant tool when die sinking sometimes.But, be airtight conditions between this vapour-pressure type knock pin and die cavity and the material road, thereby air and the gas in the molten plastic liquid in die cavity and the material road can't be extracted out, to form vacuum state.Therefore, how this knock pin being made and can be allowed gas pass through and intercept the plastics feed liquid, is the difficult problem that those skilled in the art face jointly.

The utility model content

For overcoming above-mentioned defective, the purpose of this utility model provide a kind of can allow to expect and the fusion feed liquid in gas discharge and can intercept simultaneously the mould of the improvement of feed liquid, and it has and vacuumizes and the dual-use function of the auxiliary demoulding.

To achieve these goals, the utility model provides a kind of mould of improvement, and it comprises: die ontology, and its inside is provided with gas passage, this passage inherence offers at least one port of export respectively corresponding to the appropriate position in die cavity and material road, and the passage outside forms arrival end; At least one ventilative bolt that ejects, it is embedded in the port of export and in its housing and forms step-shaped hole, one of the one side socket of this step-shaped hole only has gas permeability and the ventilative bolt that can't feed liquid passes through, one side of being somebody's turn to do ventilative bolt is thus with this step-shaped hole sealing, opposite side socket extensible member and connection push away the gas piston, make extensible member between the inwall that pushes away gas piston and step-shaped hole; Vacuum air blowing flow divider, its pedestal inside is provided with a seat hole of running through, one of inboard connection is connected part, makes this vacuum air blowing flow divider to be connected with the arrival end of gas passage thus, and arranged outside has one to be used to allow the articulated part of gas by the die ontology turnover.

Thus, under the matched moulds state, air in the die ontology and the gas in the fusion feed liquid can enter gas passage by ventilative bolt, and are extracted out by vacuum air blowing flow divider; The pressure-air that is blown into by vacuum air blowing flow divider is then by gas passage, and pushes away the gas piston and compress extensible member, impels ventilative bolt to be ejected, and gases at high pressure allowed penetrate product cooling and curing, and will penetrate product in die opening state and eject.

The beneficial effects of the utility model are, have according to mould of the present utility model and to vacuumize and the function of the auxiliary demoulding, not only can shorten the time of ejection formation effectively, also can avoid when the demoulding, because of solidifying the infull variation that causes, and can improve the quality of plastic products thus.In addition, mould of the present utility model can be in order to avoid use mould release, thus compliance with environmental protection requirements.

Description of drawings

Fig. 1 is the schematic perspective view according to improvement mould of the present utility model;

Fig. 2 a is the expression ventilative cutaway view that ejects a kind of state of bolt shown in Figure 1;

Fig. 2 b is the expression ventilative another kind of state cutaway view that ejects bolt shown in Figure 1;

Fig. 3 a is the three-dimensional exploded view of expression vacuum air blowing flow divider shown in Figure 1;

Fig. 3 b is the cutaway view of expression vacuum air blowing flow divider shown in Figure 1; And,

Fig. 4 is according to the bleed cutaway view of bolt of material bone of the present utility model.

The specific embodiment

Below with reference to the accompanying drawings preferred implementation of the present utility model is elaborated.

Shown in Fig. 1 to 4, mainly comprise die ontology 1, at least one ventilative bolt 2 and vacuum air blowing flow divider 3 of ejecting according to improvement mould of the present utility model.

Particularly, die ontology 1 is made up of male model and master mold, and at its plastics ejection formation position that will carry out, the below as die cavity 11 and material road 12 is provided with a gas passage 13.This gas passage 13 offers at least one and is arranged on the port of export 131 corresponding to the appropriate position in die ontology 1 and material road 12, be used to put and be positioned such that the described ventilative bolt 2 that ejects, and its arrival end 132 is connected with vacuum air blowing flow divider 3.In addition, reach the purpose of bleeding fast in the die ontology 1, a bleed-off passage 15 is set accordingly in the position of clout groove 14 in order to make.This bleed-off passage 15 has the material mouth end 151 and the outside port of export 152 of at least one inside, wherein, and described material mouth end 151 is used to put and the positioning material bone is bled bolt 4; 152 of the outside ports of export are (not shown by pipeline, be generally flexible pipe fitting) be connected to a non-return valve 34 that communicates with vacuum air blowing flow divider 3, so that the gas in the mould is passed through bleed-off passage 15, pipeline and non-return valve 34 sucking-offs, by vacuum air blowing flow divider 3, and by a vavuum pump extraction.

Ventilative eject bolt 2 and be arranged in the port of export 131 of gas passage 13, it is provided with the step-shaped hole 22 of a perforation in the housing 21 that is step.A ventilative bolt 23 in one side intercalation of this step-shaped hole 22, and this ventilative bolt is made by ventilative metal material, for example forms with nano level metal powder sintering, makes it have gas permeability, and can't be for liquid, especially the molten plastic feed liquid is passed through.Extensible member 24 of terminal socket that should ventilative bolt 23, spring for example, and with push away gas piston 25 and be connected, make extensible member 24 between pushing away between gas piston 25 and the step-shaped hole 22.Push away gas piston 25 by pad 28 of bolt 26 sockets, and locking ground is fixed on the end of the bolt 23 of breathing freely, makes between itself and the step-shaped hole 22 and leave a gap, pass through with supplied gas.The ventilative end that ejects the housing 21 of bolt 2 is equipped with a sealing ring 27 that is used to oppress the end edge of the port of export 131, to form gas-tight seal.In addition, the top 231 of ventilative bolt 23 all is back taper with the peristome of step-shaped hole 22, thereby avoids in the ventilative bolt 23 retraction step-shaped holes 22.In addition, in order satisfy to penetrate the demand of carving characters on the product, be carved with type matrix 232 at the end face of the head 231 of ventilative bolt 23, thus can be in die cavity this being carved characters is molded on the surface of penetrating product.

With reference to figure 2a, because ventilative bolt 23 is to be made by ventilative metal material, therefore, when in die ontology 1, bleeding, gas is by the head 231 of ventilative bolt 23, and and step-shaped hole 22 and push away the gap between the gas piston 25 and enter gas passage 13, and by hereinafter the vacuum air blowing flow divider of describing in detail 3 being extracted out.Shown in Fig. 2 b, when pressure-air enters gas passage 13 by vacuum air blowing flow divider 3, make air-flow that promotion is pushed away gas piston 25, and compression extensible member 24, eject ventilative bolt 23 thus, pressure-air is blowed to penetrate product (comprising the material bone).Like this, can quicken to penetrate the cooling and the curing of product, and it can be released die cavity 11 and material road 12, form the function of the auxiliary demoulding thus.

Shown in Fig. 3 a and 3b, vacuum air blowing flow divider 3 comprises that inside is provided with the pedestal 31 in a seat hole 311 of running through, and its of inboard connection is connected part 32, is connected with gas passage 13 thus; The outside connects an articulated part 33, forms a gas passage thus, makes that gas can be by die ontology 1 turnover.Consider the convenience of assembling, with the mode that is threadably engaged with above-mentioned articulated part 33 be connected part 32 and be fixed on the pedestal 31.In addition, pedestal 31 also is provided with an opening 312 that communicates with seat hole 311 in a side at least, so that in conjunction with non-return valve 34.The joint outer part 341 of this non-return valve 34 is connected with above-mentioned bleed-off passage 15 by pipeline, makes the gas in the die ontology 1 bleed bolt 4 and detached fast by the material bone.Connector 341 is provided with ball valve 342, spheroid 343 according to priority successively and has the check catch 344 at least one hole 345 in opening 312.When non-return valve 34 is when bleeding state, the spheroids 343 in the ball valve 342 prop up check catch 344 and form the gap because of suction, so that the gas in the die ontology 1 is extracted out, make it to be discharged by articulated part 33 by hole 345, opening 312 and seat hole 311.Otherwise when articulated part 33 was sent into pressure-air, spheroid 343 made pressure-air can't enter bleed-off passage 15 ball valve 342 sealings.

As shown in Figure 4, the material bone bolt 4 of bleeding has the pedestal 41 that a side is provided with connecting hole 411, can utilize bolt that this pedestal 41 is fixed on material mouthful end 151 1 sides.The opposite side of this pedestal 41 has a locating hole 412, and this locating hole 412 is the positioning sleeve 42 of inverted T-shaped in order to set one, and overlaps in the feeding mouth end 151, thereby compressing sealing ring 43 is to form gas-tight seal.The central authorities of this positioning sleeve 42 form the step keyhole 421 that connects, and in order to set a bolt of being made by ventilative metal material equally 44 of bleeding, make that the gas in the die ontology 1 can enter in the bleed-off passage 15 by the material bone bolt 4 of bleeding.

Thus, by adopting the utility model, the mould of improvement is had vacuumize and the dual-use function of the auxiliary demoulding, when vacuumizing, can the gas that reach in the mould in the molten plastic feed liquid be extracted out by the ventilative bolt and the bolt of bleeding, cause the defective that in penetrating product, forms hole or bubble to avoid gas; Subsequently, pressure-air is entered in the mould by gas passage, by means of ejecting of ventilative bolt, makes gas quicken the cooling and the curing of ejaculation product, and it is ejected die cavity and material road, thereby has the function of the auxiliary demoulding.Like this, except can effectively shortening ejection formation the time, also can avoid when the demoulding, because of solidifying the infull variation that causes, and mould can be in order to avoid use mould release, thus compliance with environmental protection requirements.

More than disclosed only be preferred embodiment of the present utility model, can not limit rights protection scope of the present utility model with this certainly.Be appreciated that the equivalent variations of doing according to the essence that limits in the utility model appended claims and scope, still belong to the scope that the utility model is contained.

Claims

1. improved mould comprises:

Die ontology (1), its inside are provided with gas passage (13), and this passage inherence offers at least one port of export (131) respectively corresponding to the appropriate position in die cavity (11) and material road (12), and the passage outside forms arrival end (132);

At least one ventilative bolt (2) that ejects, it is embedded in and forms step-shaped hole (22) in the described port of export (131) and in its housing, one of the one side socket of this step-shaped hole (22) only has gas permeability and the ventilative bolt (23) that can't feed liquid passes through, one side of being somebody's turn to do ventilative bolt (23) is sealed described step-shaped hole (22) thus, opposite side socket extensible member (24) and connection push away gas piston (25), make described extensible member (24) between the inwall that pushes away gas piston (25) and step-shaped hole (22);

Vacuum air blowing flow divider (3), a seat hole (311) of running through is set in its pedestal (31) inside, its of inboard connection is connected part (32), makes described vacuum air blowing flow divider (3) to be connected with the arrival end (132) of described gas passage (13) thus; Arranged outside has one to be used to allow the articulated part (33) of gas by described die ontology (1) turnover,

Thus, at the matched moulds state, air and the gas in the fusion feed liquid in the described die ontology (1) can enter described gas passage (13) by described ventilative bolt (23), and are extracted out by described vacuum air blowing flow divider (3); The pressure-air that is blown into by described vacuum air blowing flow divider (3) then passes through described gas passage (13), and promote describedly to push away gas piston (25) and compress described extensible member (24), impel described ventilative bolt (23) to be ejected, gases at high pressure are allowed penetrate the product cooling and solidify, and will penetrate product in die opening state and eject.

2. the mould of improvement according to claim 1 is characterized in that, described ventilative bolt (23) is sintered into by the nano level metal powder.

3. the mould of improvement according to claim 1 is characterized in that, the top of described ventilative bolt (231) all are back taper with the peristome of step-shaped hole (22).

4. the mould of improvement according to claim 1 is characterized in that, there is type matrix (232) on surface, the top of described ventilative bolt (231).

5. the mould of improvement according to claim 1 is characterized in that, described push away gas piston (25) by bolt (26) socket pad (28) and locking be fixed on the end of described ventilative bolt (23).

6. the mould of improvement according to claim 1 is characterized in that, the described ventilative inboard socket sealing ring of bolt (2) (27) that ejects.

7. the mould of improvement according to claim 1 further comprises the structure of bleeding, and this structure of bleeding comprises:

At least one bleed-off passage (15), this bleed-off passage (15) corresponding to clout groove (14) position be arranged on the described die ontology (1), its inside offers at least one material mouth end (151), the outside is the port of export (152);

At least one non-return valve (34), it can be arranged in the opening (312) that communicates of seat hole (311) with described vacuum air blowing flow divider (3), and the port of export (152) by pipeline and described bleed-off passage (15) is connected;

At least one material bone bolt (4) of bleeding, set positioning sleeve (42) in its pedestal (41) and be arranged on described material mouth end (151) regularly, a bolt of bleeding (44) that only has gas permeability and can't feed liquid pass through is set at the top of the step keyhole (421) of described positioning sleeve (42)

When vacuumizing, the air in the described die ontology (1) is extracted out by described vacuum air blowing flow divider (3) by the described bolt of bleeding (44), bleed-off passage (15), pipeline and described non-return valve (34).

8. the mould of improvement according to claim 7 is characterized in that, described positioning sleeve (42) socket sealing ring (43).

9. the mould of improvement according to claim 7 is characterized in that, the described bolt of bleeding (44) is to be formed by nano level metal powder sintering.