CN1081120C

CN1081120C - Gas injected molding machine

Info

Publication number: CN1081120C
Application number: CN98123416A
Authority: CN
Inventors: 李在权
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 1997-10-24
Filing date: 1998-10-21
Publication date: 2002-03-20
Anticipated expiration: 2018-10-21
Also published as: ES2149113A1; KR19990033561A; JP3027148B2; JPH11192644A; CN1215654A; KR100248772B1; ES2149113B1

Abstract

A gas injection moulding machine equipped with upper and lower moulds coupled together to form a cavity in the centre of the same and a narrow gate so as to allow the molten resin to jet at a high velocity during the gas injection and a projection designed to reduce the speed of the resin through the gate and be dispersed in all directions at the moment that the resin is hit by the projection, being then jetted towards the cavity and thus avoiding the trace phenomenon, a defect which forms on the external surface of the moulded piece.

Description

Gas-jetting moulding machine

The present invention relates to gas and spray, particularly, a kind of gas-jetting moulding machine, be used to prevent ejection (jetting) phenomenon, it is a kind of injected by a geat at gases at high pressure, when a direction spray resin, and the defective that on the moulded product outer surface of molten resin, may cause.

The gas-jetting moulding machine 10 of routine as shown in Figure 1 comprises, a cope match-plate pattern 11 and a lower bolster 12, and they combine securely.

Machine 10 also has a chamber 13 at bolster 11 and 12 s' interior center; A runner 14 that at one end forms is used for making molten resin energy inflow chamber 13 when gas jet; With a narrow geat 15, it allows molten resin to be incorporated into chamber 13 by runner 14 fast in the

chamber

13 and 14 of runners.

As shown in Figure 2, the air blades that goods 20 are air-conditioners that the gas-jetting moulding machine of this spline structure 10 forms, it is used to control the direction of the air of discharging by the outlet of the indoor set of air-conditioner (not shown).

Molded product 20 has and is formed on its inner chamber, so that reduce the consumption of manufactured materials, because can keep its preset thickness when gas sprays.

The gas-jetting moulding machine 10 of this structure with at a high speed molten resin is full of and sprays whole chamber 13 at the gas of a direction by geat 15, is made mechanograph 20.Yet the problem that the said method of gas-jetting moulding machine exists is, if the incorrect control of the jet velocity of pass through narrow geat 15 of molten resin, resin may overflow, as the result who sprays phenomenon, causes the defective on the outer surface of moulded product 20.

The present invention is intended to address the above problem, the purpose of this invention is to provide a kind of gas-jetting moulding machine, making in passing through gas jet moulded product process of its design, suitably control the speed of the molten resin that flows out by geat, and make resin distribution, thereby prevent because the defective that the ejection phenomenon forms on the mechanograph outer surface to all directions in chamber.

To achieve the object of the present invention, the gas-jetting moulding machine that provides has upper and lower template, and they are combined together to form a chamber of its central part; With a narrow geat, when making gas spray, molten resin is with high-speed sprinkling, comprising a projection, is used for reducing by hitting the flow velocity that projection flows to the resin in chamber then behind the geat, and is used for resin is spread to all directions.

Detailed description with reference in conjunction with the accompanying drawings will be better appreciated by essence of the present invention and purpose.Wherein

Fig. 1 is conventional gas-jetting moulding machine profile;

Fig. 2 is that product external surfaces molded on the gas-jetting moulding machine is because the perspective view of the defective that the resin overflow produces;

Fig. 3 is a gas-jetting moulding machine profile of the present invention;

Fig. 4 is the perspective view of the known gas-jetting moulding machine lower bolster of the present invention.

Preferred embodiment of the present invention will be described in detail by reference to the drawing.For the simplification of diagram and explanation, in all figure, identical number parts identical with symbolic representation or that be equal to, and omit unnecessary explanation.

As shown in Figure 3, when bolster 41 and 42 combines, the chamber 43 at center in moulding press 40 of the present invention is formed on; A runner 44 that at one end forms is used for making molten resin energy inflow chamber 43 when gas jet; With a narrow geat 45, it allows molten resin to be incorporated into chamber 43 by runner 44 fast in the

chamber

43 and 44 of runners.

As shown in Figure 4, the end that projection 46 is positioned on lower bolster 42, with geat 45 in chamber 43 at a distance of preset distance.The resin that needs only fusing sprays into chamber 43 by geat 45 with high speed, makes molten resin can run into projection 46, distribute to a plurality of directions, thus the speed of minimizing stir-in resin.

Projection 46 is cylindrical shapes, allows resin to impact, and changes its flow direction, distributes equably in whole chamber 43.Projection 46 is positioned near on the lower bolster of geat 45, with cope match-plate pattern distance is arranged, and makes resin run into the projection back and upwards disperses by that gap, thereby guarantee that resin evenly distributes in whole chamber 43.

Describe the work effect of gas-jetting moulding machine of the present invention below in detail.As shown in Figure 3, if molten resin is introduced into chamber 43 by runner 44 after the bolster 41,42 of moulding press 40 combines, molten resin is to enter chamber 43 by narrow geat 45 at a high speed.

At this moment, major part sprays into the molten resin in chamber 43 and collides with projection 46, projection 46 is apart from geat 45 preset distances, thereby, be full of chamber 43 with the speed that lowers in all directions, because 46 of projectioies reduce the resin flow velocity, and the resin flows direction changed over two, make resin dispersion arrive the effect in whole chamber 43 whereby.

After by projection 46, some by the gap on projection 46, and are sprayed onto cope match-plate pattern 41 to be sprayed into the resin in chamber 43 at a high speed from geat 45, thereby, guarantee to spray to all parts in chamber 43.

Therefore, the advantage of gas-jetting moulding machine of the present invention is, be positioned at the projection 46 of chamber 43 1 ends, reduce the resin flow velocity significantly, change resin flow to because, spray into the resin in chamber 43 by geat 45 in a direction by gases at high pressure, with projection collision, thereby prevent to spray phenomenon, prevent to form defective on the outer surface of moulded parts 20.

Claims

1. gas-jetting moulding machine has upper and lower template, and they are combined together to form a chamber of its central part; With a narrow geat, when making gas spray, molten resin is with high-speed sprinkling, comprising a projection, is used for reducing by hitting the flow velocity that projection flows to the resin in chamber then behind the geat, and is used for resin is spread to all directions.

2. machine according to claim 1 wherein convexes to form cylindrical shape, makes resin by hitting it, changes it and flows to, and is distributed to all parts in chamber equably.