CN102825747B

CN102825747B - Gum sealing check structure of injection molding machine

Info

Publication number: CN102825747B
Application number: CN201210138519.7A
Authority: CN
Inventors: 胡春生; 侯永平; 隋铁军
Original assignee: Guangdong Yizumi Precision Machinery Co Ltd
Current assignee: Yizhimi Co ltd
Priority date: 2012-05-04
Filing date: 2012-05-04
Publication date: 2014-08-27
Anticipated expiration: 2032-05-04
Also published as: CN102825747A

Abstract

The invention discloses a gum sealing check structure of an injection molding machine. The gum sealing check structure comprises a screw head connected with a screw; a gum washer is sleeved on the screw head; a tubular check ring is sleeved between the head part of the screw head and the gum washer; the check ring comprises a front check ring and a rear check ring; inclined planes are respectively arranged at the connecting end faces of the front check ring and the rear check ring; the inclined plane on the front check ring and the inclined plane on the rear check ring form a groove; the section of the groove is of a V shape or a U shape; the front check ring and the rear check ring are integrally molded; the gum washer is pressed on the screw; the screw head, the front check ring, the rear check ring, the gum washer and the screw are arranged inside a charging barrel; the charging barrel is connected with a jet nozzle flange, and a jet nozzle is inserted on the jet nozzle flange. According to the invention, the contradiction between the contact area and rollback force of the check ring is effectively solved; the gum sealing check structure can be applied to various injection molding machines, and has the characteristics of being simple and reasonable in structure, long in service life, fast in response, accurate in metering, and wide in application range.

Description

A kind of sealing non-return structure of injection machine

Technical field

The present invention relates to the sealing non-return structure of a kind of injection machine, particularly a kind of injection machine.

Background technology

Sealing non-return mechanism is a vitals on injection machine plasticizing apparatus, mainly by crossing glue head, crossing rubber cushion and check ring forms, when carrying out injection action, when namely screw rod pushes away before fast along axis under external force, require check ring energy fast, contact with mistake rubber cushion reliably, cut off colloid return flow path, guarantee the accuracy of ejaculation amount, but when carrying out melten gel action, when when namely screw rod rotates under external force, along with the increase of barrel front end liquid state colloid, screw rod is forced to slowly retreat, screw rod can drive glue head to rotate together with crossing rubber cushion, liquid state colloid is flowed forward along the screw channel of screw rod, promoting check ring moves forward and was squeezed on glue head, and check ring is due to the needs of sealing, gap between it and outside barrel is very little, frictional force is between the two larger, check ring cannot be rotated freely, and cross between glue head and produce relative rotary motion, and then generation wearing and tearing, affected service life.Crossing glue head is the petal structure with a plurality of breach, crossing glue head only contacts with check ring in its seamed edge position, contact area is very little, very easily produce wearing and tearing, as done greatly when increasing contact area between the two crossing glue head seamed edge, can reduce again the rollback power of check ring when injection, affect the sensitivity of check ring sealing.

The check ring that Chinese patent literature CN 201538006U disclosed a kind of radial rotation on 04th in 08 month in 2010, check ring endoporus two ends and level oblique angle at 45 °, check ring endoporus is provided with three splines, described spline is uniformly distributed on check ring endoporus circumference, and the angle between adjacent spline is 120 °.This check ring complex structure, and result of use is not ideal.

Summary of the invention

Object of the present invention aims to provide that a kind of simple and reasonable, flexible operation, long service life, response are fast, the sealing non-return structure of accurate measurement, injection machine applied widely, to overcome weak point of the prior art.

By the sealing non-return structure of a kind of injection machine of this object design, comprise the glue head excessively joining with screw rod, this is crossed on glue head and was arranged with rubber cushion, the check ring empty set of tubular is being crossed the head of glue head and is crossing between rubber cushion, its architectural feature is that check ring comprises front check ring and rear check ring, on the end face that front check ring and rear check ring join, is respectively arranged with inclined-plane.

Inclined-plane on described front check ring and the inclined-plane on rear check ring form groove.

V-shaped or the U-shaped in the cross section of described groove.

Described front check ring and rear check ring are one-body molded.

The described rubber cushion of crossing is crimped on screw rod.

Described glue head excessively, front check ring, rear check ring, mistake rubber cushion and screw rod are arranged in barrel, and barrel and nozzle flange join, and nozzle sleeve is on nozzle flange.

The present invention is divided into two of front and back by check ring: front check ring and rear check ring, this front check ring and rear check ring will have enough frictional force respectively and between barrel, can not be with crossing first rotation of glue, front check ring has contacted wear-resisting effect with mistake glue head, rear check ring plays the non-return effect of sealing, contact area between rear check ring and front check ring can be accomplished very little, and front check ring and rear check ring do not have relative motion between the two, to guarantee its larger rollback power and higher sealing sensitivity, can guarantee the quick response of sealing simultaneously, reach the effect of accurate-metering.

The present invention is due to before and after check ring is divided into two: front check ring and rear check ring, therefore can by cross seamed edge on glue head do do greatly thick in to increase the contact area between glue head and front check ring, raising anti-wear performance, and increasing the service life; Contact area between front check ring and rear check ring is very little, can reach rear check ring and when injection, produce larger rollback power, realizes fast adhesive sealing.

The present invention efficiently solves the contact area of check ring and the contradiction between rollback power, can be applicable to all kinds of injection machines, has that simple and reasonable, long service life, response are fast, an accurate measurement, feature applied widely.

Accompanying drawing explanation

Fig. 1 is the broken section structural representation of one embodiment of the invention.

In figure: 1 was glue head, 2 is front check ring, and 3 is rear check ring, and 4 was rubber cushion, and 5 is screw rod, and 6 is barrel, and 7 is nozzle, and 8 is nozzle flange, and 9 is screw.

The specific embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

Referring to Fig. 1, the sealing non-return structure of this kind of injection machine, comprise the glue head 1 excessively joining with screw rod 5, this is crossed and on glue head 1, was arranged with rubber cushion 4, the check ring empty set of tubular is being crossed the head of glue head 1 and is crossing between rubber cushion 4, check ring comprises front check ring 2 and rear check ring 3, on the end face that front check ring 2 and rear check ring 3 join, is respectively arranged with inclined-plane.In the present embodiment, the inclined-plane on front check ring 2 and the inclined-plane on rear check ring 3 form groove.V-shaped or the U-shaped in the cross section of this groove.

Cross glue head 1, front check ring 2, rear check ring 3, mistake rubber cushion 4 and screw rod 5 and be arranged in barrel 6, barrel 6 joins with nozzle flange 8, and nozzle 7 sleeves are on nozzle flange 8.Crossing rubber cushion 4 is crimped on screw rod 5.

In the present embodiment, front check ring 2 and rear check ring 3 both can be one-body molded, also can make respectively.

Cross between glue head 1 and screw rod 5 and pass through spiral marking connection, and mistake rubber cushion 4 is fixed between the two, front check ring 2 and rear check ring 3 are annular barrel, front check ring 2 and rear check ring 3 respectively empty set are being crossed glue head 1 and are being crossed between rubber cushion 4, can move freely, above part forms screw arbor assembly.Whole screw arbor assembly can be made axial linear movement or rotatablely move in barrel, and nozzle 7, nozzle flange 8, barrel 6 are coupled to an integral body by screw thread and screw 9.

Claims

1. the sealing non-return structure of an injection machine, comprise the glue head (1) excessively joining with screw rod (5), this is crossed and on glue head (1), was arranged with rubber cushion (4), the check ring empty set of tubular is being crossed the head of glue head (1) and is crossing between rubber cushion (4), it is characterized in that check ring comprises front check ring (2) and rear check ring (3), on the end face that front check ring (2) and rear check ring (3) join, be respectively arranged with inclined-plane;

Inclined-plane on inclined-plane on described front check ring (2) and rear check ring (3) forms groove;

V-shaped or the U-shaped in the cross section of described groove;

Described front check ring (2) and rear check ring (3) are one-body molded;

The described rubber cushion (4) of crossing is crimped on screw rod (5);

Described glue head (1) excessively, front check ring (2), rear check ring (3), mistake rubber cushion (4) and screw rod (5) are arranged in barrel (6), barrel (6) joins with nozzle flange (8), and nozzle (7) sleeve is on nozzle flange (8).