CN201249509Y

CN201249509Y - Screw bolt plastic helical gear mold

Info

Publication number: CN201249509Y
Application number: CNU2008201210312U
Authority: CN
Inventors: 孙武剑
Original assignee: Ningbo Shuanglin Mould Co Ltd
Current assignee: Ningbo Shuanglin Mould Co Ltd
Priority date: 2008-07-08
Filing date: 2008-07-08
Publication date: 2009-06-03
Anticipated expiration: 2018-07-08

Abstract

The utility model relates to a screw bolt plastic helical gear mold. A fixed mold core below a flow passage insert at the bottom of a stripping plate, a helical gear cavity and a movable mold cavity are sequentially sleeved at the center of a fixed mold plate from top to bottom; a screw bolt insert sequentially penetrates through the central holes of a movable mold plate, a movable soleplate and a movable mold cavity plate; the end part of the screw bolt insert extends into the movable mold cavity, the helical gear cavity and the blind hole of the fixed mold cavity; a slide block arranged below the movable mold cavity is formed by combining two opposite round shapes outside the periphery of the screw bolt insert; and the helical gear cavity, the plastic helical gear cavity at the center of the movable mold cavity and a large-shaft sleeve cavity are communicated with a flow passage. The end part of the screw bolt insert, the helical gear and the large shaft sleeve have high positioning precisions and no mutual interferences, so the coaxiality of a finished product is high, and the requirements of the production of high-precision screw bolt helical gears can be met; and without a special device, the finished product can be taken out without limit only by utilizing the movable slide block and the retreat of a curved pin and an inclined wedge.

Description

Screw rod plastic beveled wheel mold

Technical field

The utility model relates to a kind of mould mechanical manufacturing field, especially a kind of screw rod beveled wheel mold with injection mo(u)lding.

Prior art

Mould is the important technological equipment of producing various industrial products, along with developing rapidly and plastic products applying of plastic cement industry at industrial departments such as space flight, aviation, electronics, machinery, boats and ships and automobiles, product is more and more higher to the requirement of mould, the requirement that traditional mould design can't adapt to model change and improve the quality.Plastic beveled wheel is compared with metal gear, has advantages such as in light weight, that noise is low, and self lubricity is good.But because the special construction of king bolt angle plastic beveled wheel, in actual production, exist many technical barriers such as demoulding difficulty all to be difficult to solve.Especially those are used for the screw rod helical gear of some special installation of automobile industry, because the head of screw rod inserts and be in the last helical gear of screw rod inserts and the concentricity of large shaft sleeve must reach very high, therefore traditional mould is because equipment precision is not high enough, so the product percent defective of producing is very high, production efficiency is extremely low, causes product cost higher.Chinese patent on July 7th, 2004 the disclosed patent No. be " 03249303.7 ", " plastic beveled wheel mould ", it adopts core to be contained in the tapered core, gear ring is fixedlyed connected with mold insert by bearing pin, mold insert is enclosed within the taper core, with it movingly, and cooperate with moving platen by bearing, fixed head be contained in moving platen below, and be connected with backing plate with bearing pin, push rod passes backing plate and tapered core, withstand under the helical gear, during the demoulding, first pull-up die cover plate, make between moving platen and the fixed head and open, core is extracted out from helical gear, and push rod moves up then, makes helical gear release gear ring and rotates mould.Should " plastic beveled wheel mould " though simple in structure, can be used for the less plastic beveled wheel of shot volume.But for the injection screw helical gear is inapplicable.So far, this screw rod helical gear depends on external import substantially, and annual country all needs to spend a large amount of foreign exchanges from this type component of external import.

The utility model content

The purpose of this utility model is at the defective of above-mentioned prior art and deficiency, for the mould mechanical manufacturing field provides a kind of setting accuracy on work height, is the mould of plastic beveled wheel at the screw rod relative position, for a new road is walked out in the product production domesticization.

The technical measures taked of the utility model are for achieving the above object: this screw rod plastic beveled wheel mold, it comprises dynamic model part and cover half part, the Bottom clamp plate of described dynamic model part, the dynamic model backing plate, the dynamic model cavity plate is screwed mutually, described cover half partly comprises the top clamping plate and the stripper plate of connection fastened to each other, the cover half die cavity that it is characterized in that the runner mold insert below of stripper plate bottom, on helical gear die cavity and the dynamic model die cavity, set gradually the mutual suit of step-like contact-making surface down and be pressed in the center of cover half die cavity, the screw rod inserts is interspersed in Bottom clamp plate successively by screw bolt seat, the dynamic model backing plate, the centre bore of dynamic model cavity plate, the dynamic model die cavity is stretched in its end, in the blind hole of helical gear die cavity and cover half die cavity, place dynamic model die cavity below by the two toroidal shape slide blocks of splitting and close in screw rod inserts periphery, the plastics large shaft sleeve end cavity at the plastic beveled wheel cavity at helical gear die cavity center and dynamic model die cavity center communicates with runner.

Described two both sides of splitting the toroidal slide block are equipped with the curved pin that is leaned on mutually by oblique contract respectively.

Described screw rod inserts is by the two arranged side by side centre bores that place Bottom clamp plate, dynamic model backing plate, dynamic model cavity plate, its end is stretched into respectively in the blind hole of the dynamic model die cavity, helical gear die cavity and the cover half die cavity that are set up in parallel, and supporting with it two plastic beveled wheel cavitys arranged side by side and plastics large shaft sleeve end cavity communicate with runner respectively.

On the contact-making surface of described helical gear die cavity and cover half die cavity ball and retainer are housed.

Between described stripper plate and the top clamping plate and between dynamic model cavity plate and cover half cavity plate, the stripper plate distance screws is housed respectively.

The utility model is because screw rod inserts end is located by cast gate mold insert blind hole, and helical gear die cavity and dynamic model die cavity are by cover half die cavity and cover half core location, and positioning relation does not disturb mutually mutually.Make the concentricity of plastic beveled wheel, large shaft sleeve and screw rod inserts very high, can satisfy the needs of production high accuracy product.The utility model shaping mould does not need special device, utilizes the slide block of only placing movable side, curved pin, oblique contract to give up the throne, and not taken out by restriction ground.

Description of drawings

Fig. 1 is a cross section view of the present utility model.

Fig. 2 is A-A cutaway view of Fig. 1.

Fig. 3 is B-B cutaway view of Fig. 1.

Fig. 4 is C-C cutaway view of Fig. 3.

The specific embodiment

As shown in the figure, the utility model partly is made up of dynamic model part and cover half.See Fig. 1, Fig. 4, screw rod inserts 16 in the described dynamic model part is interspersed in among screw moving clamping plate 15 fastened to each other, dynamic model backing plate 14, the dynamic model cavity plate 12 by screw bolt seat 17, dynamic model die cavity 10 is stretched into successively by slide block 11 in the end of screw rod inserts, helical gear die cavity 9 and being opened in the blind hole of cover half die cavity 6 bottoms.The center bore inner wall of described helical gear die cavity 9 is provided with the helical gear line, and the center of dynamic model die cavity 10 is an axle sleeve hole.The centre bore of helical gear die cavity 9 links to each other with the central shaft trepanning of dynamic model cavity plate 12.Described slide block 11 is by two split circular and closes and form that its center two semi-circular hole are pinned the axle of screw rod inserts 16.The vertical two ends of slide block are provided with the slide block pressing plate 23 that is fixed on the dynamic model cavity plate 12, and the slide block arranged outside has the two curved pins 25 that fix with cover half cavity plate 7, and the arranged outside of curved pin has the wedge 26 of fixedlying connected with cover half cavity plate 7.Described cover half partly comprises with distance screws 2 fixedly connected top clamping plate 3 and stripper plate 4, and the cover half cavity plate 7 that links to each other with stripper plate.The cover half core 18, helical gear die cavity 9 and the dynamic model die cavity 10 upper and lower mutual suits of step-like contact-making surface that set gradually that are arranged in the cover half die cavity 6 at cover half cavity plate 7 centers compress.Runner mold insert 19 is positioned at the top of stripper plate 4 belows, cover half die cavity 6 and cover half core 18.Hot mouth 1 is in the centring ring center on the top clamping plate.On the runner mold insert, offer the runner 21 that links to each other with hot mouth 1.The coaxial setting of centre bore of screw rod inserts 16 and cover half core 18 bottom blind holes, helical gear die cavity 9, dynamic model die cavity 10.The plastic beveled wheel cavity 22 at helical gear die cavity 9 and dynamic model die cavity 10 centers links to each other side by side with large shaft sleeve end cavity, and communicates with runner 21.On the upper and lower contact-making surface of cover half die cavity 6 and helical gear die cavity 9, ball and retainer 27 are housed, cover half die cavity 6 and helical gear die cavity 9 are closely pasted mutually.With distance screws 13 dynamic model cavity plate 12 and cover half cavity plate 7, stripper plate 4 are fixedly connected sequentially mutually.The cover half cavity plate 7 that is positioned at stripper plate 4 belows is provided with spring base, is set with compression spring 5 on the distance screws 13 in the spring base.On cover half cavity plate 7, load onto resin shutter 8.At the top clamping plate 3 of mould and the outside of Bottom clamp plate 15 thermal insulation board 20 and thermal insulation board 20 ' are housed respectively, so that the hot flow path insulation.Be fixed with lock module 24 between top clamping plate outside mould and the dynamic model cavity plate.

In order to improve production efficient, be preferably in and settle two screw rod inserts 16 arranged side by side in the mould.Shown in Fig. 1,4, these two screw rod inserts are interspersed in after Bottom clamp plate 15, dynamic model backing plate 14, dynamic model cavity plate 12 stretch into dynamic model die cavity 10, helical gear die cavity 9 successively by screw bolt seat 17 respectively, and its end places the blind hole of cover half core 18.

Fig. 2 is A-A cutaway view of Fig. 1.From figure, can know top clamping plate 3, cover half cavity plate 7, cover half die cavity 6, dynamic model die cavity 10, helical gear cavity plate 7, helical gear die cavity 9, helical gear cavity 22 and the relative position of screw rod inserts 16 in mould of finding out the cover half part.

Fig. 2 is B-B cutaway view of Fig. 1.From figure, can know moving clamping plate 15, dynamic model cavity plate 12, slide block 11, dynamic model die cavity 10 and the relative position of screw rod inserts in mould of finding out the dynamic model part.

During matched moulds, injection machine is partly pushed dynamic model to cover half part matched moulds, the plastics of fusion enter cavity helical gear die cavity and the dynamic model die cavity by hot mouth 1 from hot flow path, and the helical gear cavity 22 of screw rod inserts and the large shaft sleeve end cavity that is attached thereto are filled up the back cooling forming.

During die sinking, injection machine discharges mold clamping force, and cover half cavity plate 7 is at first separated with stripper plate 4 under the screen resilience effect of spring 5, makes stub bar and product break (disengaging die cavity), and runner is pulled out from runner mold insert 19.Continue die sinking, under the effect of distance screws 2 and resin shutter 8, top clamping plate 3 and stripper plate 4 are separated, stub bar comes off from drawing stock column, drops out between stripper plate 4 and cover half cavity plate 7.Continue die sinking, behind the dead stripper plate stroke of distance screws 2 limits, cover half cavity plate 7 is separated with dynamic model cavity plate 12, until reaching the die sinking distance that injection machine is set.When cover half cavity plate 7 was separated with dynamic model cavity plate 12, curved pin 25 can drive slide block 11 and slip off toward both sides, and the screw rod plastic beveled wheel finished product can take out with artificial (or manipulator) from mould like this, was reentered into the screw rod inserts, entered next circulation.

Claims

1, a kind of screw rod plastic beveled wheel mold, it comprises dynamic model part and cover half part, the Bottom clamp plate (15) of described dynamic model part, dynamic model backing plate (14), dynamic model cavity plate (12) is screwed mutually, described cover half partly comprises the top clamping plate (3) and the stripper plate (4) of connection fastened to each other, the cover half die cavity (18) that it is characterized in that runner mold insert (19) below of stripper plate (4) bottom, on helical gear die cavity (9) and the dynamic model die cavity (10), set gradually the mutual suit of step-like contact-making surface down and be pressed in the center of cover half die cavity (6), screw rod inserts (16) is interspersed in Bottom clamp plate (15) successively by screw bolt seat (17), dynamic model backing plate (14), the centre bore of dynamic model cavity plate (12), dynamic model die cavity (10) is stretched in its end, in the blind hole of helical gear die cavity (9) and cover half die cavity (18), place the slide block by two toroidals of splitting (11) of dynamic model die cavity below and close in screw rod inserts periphery, the plastics large shaft sleeve end cavity at the plastic beveled wheel cavity at helical gear die cavity (9) center and dynamic model die cavity (10) center communicates with runner (21).

2, screw rod plastic beveled wheel mold according to claim 1 is characterized in that described two both sides of splitting toroidal slide block (11) are equipped with the curved pin (25) that is leaned on mutually by oblique contract (26) respectively.

3, screw rod plastic beveled wheel mold according to claim 1 and 2, it is characterized in that described screw rod inserts (16) is by the two arranged side by side centre bores that place Bottom clamp plate, dynamic model backing plate, dynamic model cavity plate, its end is stretched into respectively in the blind hole of the dynamic model die cavity, helical gear die cavity and the cover half die cavity that are set up in parallel, and supporting with it two plastic beveled wheel cavitys arranged side by side and plastics large shaft sleeve end cavity communicate with runner respectively.

4, screw rod plastic beveled wheel mold according to claim 3 is characterized in that on the contact-making surface of described helical gear die cavity and cover half die cavity ball and retainer (27) being housed.

5, screw rod plastic beveled wheel mold according to claim 4, it is characterized in that between described stripper plate (4) and the top clamping plate (3) and dynamic model cavity plate (12) and cover half cavity plate (7), stripper plate (4) between distance screws (2,13) is housed respectively.