CN203092953U

CN203092953U - pouring gate-adjustable hot runner mold

Info

Publication number: CN203092953U
Application number: CN 201220076208
Authority: CN
Inventors: 李象烈
Original assignee: SINO MOULD COMPONENT (DONGGUAN) CO Ltd
Current assignee: SINO MOULD COMPONENT (DONGGUAN) CO Ltd
Priority date: 2012-03-02
Filing date: 2012-03-02
Publication date: 2013-07-31
Anticipated expiration: 2022-03-02

Abstract

The utility model discloses a pouring gate-adjustable hot runner mold which comprises a splitter plate and a hot sprue; the hot nozzle is internally provided with a valve needle which is driven by injection molding pressure in a melt plastic runner and regulates the size of a pouring gate of the hot nozzle; the root part of the valve needle is installed on a valve needle fixing device which is fixed in the melt plastic runner of the splitter plate; and the tail end of the valve needle fixing device is provided with an elastic element. Compared with the prior art, the pouring gate-adjustable hot runner mold provided by the utility model regulates the size of the pouring gate by adopting the injection molding pressure as the driving force, drives the valve needle to move by adopting the injection molding pressure, and enlarges the pouring gate surface in injection molding; the outer shearing force of the pouring gate is decreased in injection molding of plastic elements, and the appearances of the plastic elements are flawless. On the premise of guaranteeing the performances, quality and appearances of the plastic elements, the abrasion to a mold is reduced. After injection molding, the valve needle resets, and the problems of unattractive appearance of the pouring gate and ultra high pouring gate are prevented.

Description

The adjustable hot runner mould of cast gate

Technical field

The utility model relates to the hot runner mould field, especially relates to the self-adjustable TOP-TIP system of a kind of cast gate size.

Background technology

In the injection moulding industry, the size of mould gate generally is set with fixed numbers, to satisfy the requirement of injection moulding.In the time can not satisfying the demands, generally satisfy product requirement by the size that changes cast gate.But when cast gate is excessive, can cause cast gate not attractive in appearance, cast gate is drawn high, and appearance requirement can not get guaranteeing; When cast gate was too small, the product injection moulding was not full, and cast gate place shearing force is excessive, and is serious to die wear, dissolved plastic solution and broke, and also can occur spraying and crawl, caused producing corrugated vestige or other blemish on the plastic surface.

The utility model content

The technical problems to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, and proposes a kind of TOP-TIP, regulates the heat flow passage sprue size by the mode that adopts injection pressure to make driving force.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: the adjustable hot runner mould of a kind of cast gate, comprise flow distribution plate and Re Zui, and be provided with the needle that is subjected to the hot mouth cast gate of the adjusting size that injection pressure drives in the melt plastic cement runner in the described hot mouth.

In the adjustable hot runner mould of described cast gate, the root of described needle is installed on the described needle fixator, and described needle fixator places the melt plastic cement runner of described flow distribution plate, and the tail end of described needle fixator is provided with flexible member; Be full of the state of the melt plastic cement of injection pressure at runner, described needle fixator is opened runner at the effect lower compression flexible member of injection pressure, drives on the needle to move, and it is big that hot mouth cast gate becomes; Finish the state that runner does not have injection pressure when injection moulding, described needle fixator closed flow under the effect of flexible member promotes needle and moves down, and the tip of needle is reset to cast gate, and cast gate recovers original size.

In the adjustable hot runner mould of described cast gate, it is the taper round platform that matches with the needle runner that described needle fixator is subjected to the leading portion of injection pressure effect, and the end diameter of taper round platform is less than the aperture of needle runner, and this small end places in the needle runner; The back segment that described needle fixator and flow distribution plate are slidingly matched is a cylinder, and this cylinder places in the slideway of the fixator of needle described in the flow distribution plate; The slideway of described needle fixator is positioned at the top of needle runner, and coaxial with the needle runner; The root of described needle is fixed in the stepped hole at described needle fixator center, the dead in line of the axis of needle and described needle fixator.

In the adjustable hot runner mould of described cast gate, described flexible member is a butterfly spring, and this butterfly spring is arranged in the slideway of described needle fixator, fits with the tail end of described needle fixator in the big footpath of butterfly spring.

In the adjustable hot runner mould of described cast gate, the path of described butterfly spring and the loading end of supporting cover fit, and this supporting cover is used for described needle fixator and butterfly spring are installed in the slideway of needle fixator described in the described flow distribution plate.

In the adjustable hot runner mould of described cast gate, described supporting cover is fixed on the upper surface of described flow distribution plate by screw.

In the adjustable hot runner mould of described cast gate, the rear of described needle fixator stepped hole is provided with internal thread, and the internal thread of a grub screw by stepped hole is pressed on the root of needle in the stepped hole of described needle fixator.

In the adjustable hot runner mould of described cast gate, the root of the step cutting pattern that described needle comprises the needle-like body, extended upward by needle-like body tail end and by the downward extended tip of needle-like body head end; Described needle passes the stepped hole at described needle fixator center, and the cast gate place of described hot mouth is touched in the tip of described needle.

In the adjustable hot runner mould of described cast gate, described hot mouth is fixed on the lower surface of described flow distribution plate, and described hot mouth inside is provided with the needle runner that runs through himself, when described flexible member generation deformation, described needle runner can with described melt plastic cement runner vertical connection.

Compared with prior art, the adjustable hot runner mould of cast gate of the present utility model, the mode that adopts injection pressure to make driving force is regulated the cast gate size, move by the injection pressure valve needle, increase gate land during injection moulding, the outer shearing force of cast gate diminishes the flawless scar of plastic outward appearance during the plastic injection.Guaranteeing to have reduced wearing and tearing under the plastic performance quality outward appearance prerequisite to mould.After injection moulding was finished, needle resetted, and avoided the not attractive in appearance and too high problem of cast gate of cast gate.

Description of drawings

Fig. 1 is the cutaway view of embodiment of the present utility model, and the needle fixator has sealed runner among the figure under the effect of flexible member.

Fig. 2 A is the cutaway view of embodiment of the present utility model, the needle fixator state when having opened runner under the effect of injection pressure; Fig. 2 B is the cutaway view of embodiment of the present utility model, the needle tip state when having opened runner under the effect of injection pressure.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment, the utility model is given elaboration further.

Referring to shown in Figure 1, the adjustable hot runner mould of the utility model cast gate comprises flow distribution plate 1 and hot mouth 2, is provided with in the hot mouth to be subjected to the needle 21 that injection pressure drives in the melt plastic cement runner 11, is used to regulate hot mouth cast gate 22 sizes.The root of needle 21 is installed on the needle fixator 3, and needle fixator 3 places the melt plastic cement runner 11 of flow distribution plate 1, and the tail end of needle fixator 3 is provided with flexible member 31.Be full of the state of the melt plastic cement of injection pressure at runner 11, needle fixator 3 is opened runner 11 at the effect lower compression flexible member 31 of injection pressure, drives on the needle 21 to move, and hot mouth cast gate 22 becomes big; Finish when injection moulding, runner 11 does not have the state of injection pressure, and needle fixator 3 is closed flow 11 under the effect of flexible member 4, promotes needle 21 and moves down, and top 211 of needle is reset to cast gate 22, and cast gate 22 recovers original size.

Needle fixator 3 is subjected to the leading portion of injection pressure effect, is the taper round platform 31 that matches with needle runner 23, and the end diameter of taper round platform 31 is less than the aperture of needle runner 23, and this small end places in the needle runner 23.Needle fixator 3 and the back segment that flow distribution plate 1 is slidingly matched are a cylinder 32, and this cylinder 32 places in the slideway of flow distribution plate 1 needle fixator 3; The slideway of needle fixator is positioned at the top of needle runner 23, and coaxial with needle runner 23; The root 212 of needle 21 is fixed in the stepped hole 33 at needle fixator 3 centers, the dead in line of the axis of needle 21 and needle fixator 3.

Flexible member 4 can be butterfly spring, this butterfly spring is arranged in the slideway of needle fixator, fit with the tail end of described needle fixator 31 34 in the big footpath of butterfly spring, the loading end 51 of the path of butterfly spring and supporting cover 5 fits, and this supporting cover 5 is used for needle fixator 3 and butterfly spring are installed in the slideway of flow distribution plate 1 needle fixator 3.

Further, supporting cover 5 can be fixed on the upper surface of flow distribution plate 1 by

screw

52,53.

The rear of needle fixator 3 stepped holes 33 is provided with internal thread, and the internal thread of a grub screw 6 by stepped hole is pressed on the root 212 of needle 21 in the stepped hole 33 of needle fixator 3.The root 212 of the step cutting pattern that needle 21 comprises needle-like body 213, extended upward by needle-like body tail end and by the downward extended tip 211 of needle-like body head end.Needle passes the stepped hole 33 at needle fixator 3 centers, and cast gate 22 places of hot mouth are touched in the tip 211 of described needle 21.

Hot mouth 2 is fixed on the lower surface of described flow distribution plate 1, and hot mouth 2 inside are provided with the needle runner 23 that runs through himself, when deformation take place in flexible member 4, needle runner 23 can with described melt plastic cement runner 11 vertical connections.

Need to prove that shown in Fig. 2 A, Fig. 2 B, melt plastic cement flows to cast gate from runner 11 during work, because of needle fixator 3 runner is sealed that under the effect of injection pressure, move on the needle 21, disk spring is forced to compression, this moment, runner was opened.The needle fixator drives on the needle and moves, and it is big that cast gate becomes.When injection moulding is finished, when runner did not have injection pressure, disk spring was reduced into free state, and needle fixator 3 moves down closed flow 11, and the tip of needle 21 is reset to cast gate, and cast gate recovers original size.This structure has effectively increased cast gate place diameter when work, reduced the shearing force of plastic cement by cast gate the time, reduces the wearing and tearing to die.The product injection moulding is full, has guaranteed the beautiful of product appearance.

Foregoing; it only is preferred embodiment of the present utility model; be not to be used to limit embodiment of the present utility model; those of ordinary skills are according to main design of the present utility model and spirit; protection domain of the present utility model can carry out corresponding flexible or modification very easily, so should be as the criterion with the desired protection domain of claims.

Claims

1. the adjustable hot runner mould of cast gate comprises flow distribution plate and Re Zui, it is characterized in that, is provided with the needle that is subjected to the hot mouth cast gate of the adjusting size that injection pressure drives in the melt plastic cement runner in the described hot mouth.

2 .The adjustable hot runner mould of cast gate according to claim 1, it is characterized in that, the root of described needle is installed on the needle fixator, and described needle fixator places the melt plastic cement runner of described flow distribution plate, and the tail end of described needle fixator is provided with flexible member; Be full of the state of the melt plastic cement of injection pressure at runner, described needle fixator is opened runner at the effect lower compression flexible member of injection pressure, drives on the needle to move, and it is big that hot mouth cast gate becomes; Finish the state that runner does not have injection pressure when injection moulding, described needle fixator closed flow under the effect of flexible member promotes needle and moves down, and the tip of needle is reset to cast gate, and cast gate recovers original size.

3 .The adjustable hot runner mould of cast gate according to claim 2, it is characterized in that, it is the taper round platform that matches with the needle runner that described needle fixator is subjected to the leading portion of injection pressure effect, and the end diameter of taper round platform is less than the aperture of needle runner, and this small end places in the needle runner; The back segment that described needle fixator and flow distribution plate are slidingly matched is a cylinder, and this cylinder places in the slideway of the fixator of needle described in the flow distribution plate; The slideway of described needle fixator is positioned at the top of needle runner, and coaxial with the needle runner; The root of described needle is fixed in the stepped hole at needle fixator center, the dead in line of the axis of needle and described needle fixator.

4 .The adjustable hot runner mould of cast gate according to claim 3 is characterized in that, described flexible member is a butterfly spring, and this butterfly spring is arranged in the slideway of described needle fixator, fits with the tail end of described needle fixator in the big footpath of butterfly spring.

5 .The adjustable hot runner mould of cast gate according to claim 4, it is characterized in that, the path of described butterfly spring and the loading end of supporting cover fit, and this supporting cover is used for described needle fixator and butterfly spring are installed in the slideway of needle fixator described in the described flow distribution plate.

6 .The adjustable hot runner mould of cast gate according to claim 5 is characterized in that, described supporting cover is fixed on the upper surface of described flow distribution plate by screw.

7 .The adjustable hot runner mould of cast gate according to claim 5, it is characterized in that, the rear of described needle fixator stepped hole is provided with internal thread, and the internal thread of a grub screw by stepped hole is pressed on the root of needle in the stepped hole of described needle fixator.

8 .The adjustable hot runner mould of cast gate according to claim 2 is characterized in that, the root of the step cutting pattern that described needle comprises the needle-like body, extended upward by needle-like body tail end and by the downward extended tip of needle-like body head end; Described needle passes the stepped hole at described needle fixator center, and the cast gate place of described hot mouth is touched in the tip of described needle.

9 .The adjustable hot runner mould of cast gate according to claim 2, it is characterized in that, described hot mouth is fixed on the lower surface of described flow distribution plate, and described hot mouth inside is provided with the needle runner that runs through himself, when described flexible member generation deformation, described needle runner can with described melt plastic cement runner vertical connection.