CN205278459U - Check valve for rubber of moulding plastics - Google Patents

Abstract

The utility model relates to a valve, the utility model discloses a check valve for rubber of moulding plastics, which comprises the following components: a valve body, the valve body is connected on the section of thick bamboo of moulding plastics and is established between screw rod and cylinder, a valve seat is arranged in the valve body, be equipped with the case on the disk seat, be connected with the valve rod that passes the valve body on the disk seat, it has the striker plate to articulate on the valve body of case below, be equipped with the elastic component between striker plate and the valve body, the arch has set firmly on the valve body between striker plate and the disk seat, protruding and striker plate sets up relatively, striker plate and bellied length sum are greater than the bore of valve body, this patent application is compared with prior art, and the cylinder is when the extrusion plastic, and the setting of check valve has prevented that partial plastic from being extrudeed on the screw rod to make the plastic can not apply the effort to the screw rod, reduced the damage of screw rod, improved the life of screw rod.

Description

Injection molded elastomer check valve

Technical field

The utility model relates to a kind of valve, has been specifically related to a kind of injection molded elastomer check valve.

Background technology

The method that plastic cement is shaped is a lot, but it is the most general with the use of injection molding method, especially in recent years for continuous research and the improvement of forming machine, by manual, semi-automatic and arrive and automatically changed, but the difference because of formed machining character, must there is various multi-form forming mill, to adapt to different working conditions, even if in the forming mill of same specification, also can be different because of the design of each producer, and form is different.

Generally, universal injection moulding machine basic structure comprises three major parts, i.e. ejecting device, close die device (lock mould and stripper apparatus) and hydrostatic transmission and electrical control system, wherein ejecting device is the cardiac component of injection moulding machine, its effect ensures timing, quantitatively heating material plasticizing and melting, then with certain pressure and faster speed the molten plastic being equivalent to a shot is injected in mold cavity, penetrate the complete melt also being had one period of dwell time to shrink because of cooling to supplement a part in die cavity, make goods closely knit and prevent material reflux in die cavity. therefore, ejecting device must ensure that plastics evenly plastify, and has enough injection pressure and dwell pressure.

These ejecting devices required can be met and mainly contain plunger tpe, plunger one screw, screw etc., wherein screw ejecting device, comprise injection moulding cylinder, injection moulding cylinder is communicated with hopper, screw rod 10 it is provided with in injection moulding cylinder, it is provided with cylinder 11 in the left side injection moulding cylinder of screw rod 10, as shown in Figure 2, when cylinder 11 place transported to by plastic cement by screw rod 10, when plastic cement amount reaches a certain amount of, screw rod 10 stops rotating, start cylinder 11, plastic cement is injected in mould by cylinder 11, and because screw rod 10 is adjacent with cylinder, cylinder is when extruding plastic cement, part plastic cement can be compressed on screw rod 10, and screw rod 10 is applied pressure, screw rod 10 is caused damage, reduce screw rod 10 work-ing life.

Practical novel content

The utility model is intended to provide a kind of injection molded elastomer check valve increased work efficiency.

Injection molded elastomer check valve in this scheme, comprise valve body, valve body is connected on injection moulding cylinder and is located between screw rod and cylinder, is provided with valve seat in valve body, and valve seat is provided with spool, spool is connected with the valve rod through valve body, valve body below valve seat is hinged with blocking material plate, between blocking material plate and valve body, is provided with elasticity part, the valve body between blocking material plate and valve seat is installed with projection, protruding and blocking material plate is oppositely arranged, and blocking material plate and protruding length sum are greater than the bore of valve body.

Know-why and the useful effect of this scheme be: check valve place transported to by plastic cement by screw rod, and enter in valve body, by control valve rod, spool being separated with valve seat, and is opened by the opening of valve seat, plastic cement enters in the valve body below valve seat by opening, plastic cement contacts with blocking material plate, and press blocking material plate swung downward, blocking material plate not with projection contacts, plastic cement flows in the injection moulding cylinder of valve body outside through blocking material plate.

Then plastic cement enters in cylinder, start cylinder, plastic cement is injected in mould by cylinder, because cylinder is connected with valve body, so part plastic cement will have in squeezed inlet valve body, plastic cement contacts with blocking material plate subsequently, elasticity part it is provided with between blocking material plate and valve body, blocking material plate will be kept certain height, now plastic cement is by upwardly blocking material plate, blocking material plate upwards swings, it is oppositely arranged with blocking material plate because of protruding again, blocking material plate and protruding length sum are greater than the bore of valve body, so blocking material plate will with projection contacts and offset, make to be closed below valve seat, therefore plastic cement can not contact with valve seat, more can not enter into above valve seat by the opening of valve seat, and pass through valve body, plastic cement is contacted with screw rod.

Compared with prior art, cylinder is when extruding plastic cement, and the setting of check valve, prevents part plastic cement to be compressed on screw rod, and makes plastic cement screw rod can not be applied reactive force, decrease the damage of screw rod, it is to increase the work-ing life of screw rod.

Further, between valve rod and valve body, it is provided with gasket, when valve rod makes spool be separated with valve seat, valve rod is relative to valve body or slip or rotates, gap between the two easily makes plastic cement flow out, and gasket can make to be formed between valve rod and valve body sealing, avoids plastic cement excessive in valve body.

Further, elasticity part is spring, and spring is a kind of mechanical component utilizing elasticity to carry out work, there is deformation in the part made with resilient material, again recovers original state after removing external force under external force, when cylinder stops extruding plastic cement, blocking material plate, by the elastic force of spring, is easy to recover original state.

Further, in projection, the side of close blocking material plate is provided with rubber pad, and rubber pad can produce micro-deformation, when blocking material plate contacts with rubber pad, rubber pad can produce distortion so that it is more tight that blocking material plate contacts with rubber pad, further ensures plastic cement and can not contact valve seat.

Further, blocking material plate is rubber plate, and equally when blocking material plate contacts with rubber pad, blocking material plate also can deform so that it is more tight that blocking material plate contacts further with rubber pad, further ensures again plastic cement and can not contact valve seat.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model injection molded elastomer check valve embodiment;

Fig. 2 is the schematic diagram of prior art in background technology.

Embodiment

Below by embodiment, the utility model is described in further detail:

Reference numeral in Figure of description comprises: valve body 1, valve rod 2, gasket 3, valve seat 4, spool 5, rubber plate 6, extension spring 7, projection 8, rubber pad 9, screw rod 10, cylinder 11.

Shown in the basic reference drawing 1 of embodiment and Fig. 2: injection molded elastomer check valve, comprise valve body 1, valve body 1 is connected on injection moulding cylinder and is located between screw rod 10 and cylinder 11, valve seat 4 it is provided with in valve body 1, valve seat 4 is provided with spool 5, spool 5 is connected with the valve rod 2 through valve body 1, gasket 3 it is provided with between valve rod 2 and valve body 1, valve body 1 below valve seat 4 is hinged with rubber plate 6, extension spring 7 it is provided with between rubber plate 6 and valve body 1, valve body 1 between rubber plate 6 and valve seat 4 is installed with protruding 8, on protruding 8, the side of close rubber plate 6 is provided with rubber pad 9, protruding 8 are oppositely arranged with rubber plate 6, the length sum of rubber plate 6 and projection 8 is greater than the bore of valve body 1.

Check valve place transported to by plastic cement by screw rod 10, and enter in valve body 1, by control valve rod 2, spool 5 being separated with valve seat 4, and is opened by the opening of valve seat 4, plastic cement enters in the valve body 1 below valve seat 4 by opening, plastic cement contacts with rubber plate 6, and pressing rubber plate 6 swung downward, rubber plate 6 does not contact with protruding 8, and plastic cement flows in the injection moulding cylinder of valve body 1 outside through rubber plate 6.

Then plastic cement enters in cylinder 11, start cylinder 11, plastic cement is injected in mould by cylinder 11, because cylinder 11 is connected with valve body 1, so part plastic cement will have in squeezed inlet valve body 1, plastic cement contacts with rubber plate 6 subsequently, extension spring 7 it is provided with between rubber plate 6 and valve body 1, blocking material plate will be kept certain height, now plastic cement will upwardly upwards swing by rubber plate 6, it is oppositely arranged with rubber plate 6 because of protruding 8 again, the length sum of rubber plate 6 and projection 8 is greater than the bore of valve body 1, so rubber plate 6 by contacting with the rubber pad 9 of projection 8 and offsets, make to be closed below valve seat 4, therefore plastic cement can not contact with valve seat 4, more can not enter into above valve seat 4 by the opening of valve seat 4, and by valve body 1, plastic cement is contacted with screw rod 10.

Above-described is only embodiment of the present utility model, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this. Should be understood that; for a person skilled in the art, under the prerequisite not departing from the utility model structure, it is also possible to make some distortion and improvement; these also should be considered as protection domain of the present utility model, and these all can not affect effect and the practical applicability that the utility model is implemented. The protection domain that this application claims should be as the criterion with the content of its claim, and the embodiment in specification sheets etc. record the content that may be used for explaining claim.

Claims (5)

1. injection molded elastomer check valve, it is characterized in that, comprise valve body, valve body is connected on injection moulding cylinder and is located between screw rod and cylinder, valve seat it is provided with in valve body, valve seat is provided with spool, and spool is connected with the valve rod through valve body, and the valve body below valve seat is hinged with blocking material plate, elasticity part it is provided with between blocking material plate and valve body, being installed with projection on valve body between blocking material plate and valve seat, protruding and blocking material plate is oppositely arranged, and blocking material plate and protruding length sum are greater than the bore of valve body.

2. injection molded elastomer check valve according to claim 1, it is characterised in that: it is provided with gasket between described valve rod and valve body.

3. injection molded elastomer check valve according to claim 2, it is characterised in that: described elasticity part is spring.

4. injection molded elastomer check valve according to claim 3, it is characterised in that: in described projection, the side of close blocking material plate is provided with rubber pad.

5. injection molded elastomer check valve according to claim 4, it is characterised in that: described blocking material plate is rubber plate.