CN201105496Y

CN201105496Y - Modified hot-sprue plug die

Info

Publication number: CN201105496Y
Application number: CNU2007201135660U
Authority: CN
Inventors: 林作钱
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-22
Filing date: 2007-08-22
Publication date: 2008-08-27
Anticipated expiration: 2017-08-22

Abstract

The utility model discloses a hot runner rubber plug mould, which consists of a fixed mould and a movable mould by sequential overlapping, the interior of the hot runner rubber plug mould is provided with a plurality of mould cavities; the fixed mould is sequentially overlapped by a hot runner supporting frame, a hot flow nozzle inserting sleeve fixed plate and a core fixed plate; each mould cavity is provided with a core in the core fixed plate, a cavity inserting sleeve in the movable mould, a hot flow nozzle in the hot runner supporting frame, a hot flow nozzle inserting sleeve and a cooling water hole in the hot flow nozzle inserting sleeve fixed plate; the interior of the cavity inserting sleeve is provided with an ejector rod, the interior of the core is provided with a pin point gate, and a cavity is formed by a gap which is surrounded by the bottom part of the core, the cavity inserting sleeve and the upper part of the ejector rod. The hot runner rubber plug mould has the advantages that: the cavity is arranged at the movable mould part, the release of the mould is easy during the mould opening, the blanking of the rubber plug is smooth during the mould opening, and the productivity is improved; the ejector rod is arranged at the external top part of the product, and the exhaust is smooth during the injection; a feed point where the pin point gate enters the cavity is positioned at the bottom part of the rubber plug, the pin point gate carries out the feeding from the bottom part of the rubber plug, the injection molding seam of the rubber plug is small, the outer surface of the product has no deficient mark and the sealing property of the rubber plug is good.

Description

A kind of improved hot flow path plug and mould

Technical field

The utility model belongs to a kind of mould, specifically belongs to the injection mold of making the syringe rubber plug special use.

Background technology

At present, exceed standard though know the monoxide of natural rubber perfectly well, can influence human beings'health, syringe rubber plug also all adopts natural rubber manufacturing (raw material of U.S.'s strict regulations syringe rubber plug can not adopt natural rubber) basically.The plug of syringe can be with PVC and thermoplastic elastomer (TPE) TPE, TPR injection mo(u)lding, the elasticity of these two kinds of material is all than natural rubber difference, in actual applications, because of factors such as time, weather, silication cause syringe leakage phenomenon to occur, thereby can not fundamentally reverse the trend of natural rubber as the syringe rubber plug raw material.

Plug with PVC and thermoplastic elastomer (TPE) TPE, TPR, employing top or the injection moulding of submarine feeding manner all is two road sealing rings at present, be top edge and feather edge two road sealing rings, the ring point place radius of this structure plug is big, protrusion is not obvious, thereby causes problems such as demoulding difficulty, plug activity poor performance, poor sealing.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of plug and mould is provided, and the seam of this mould plug injection mo(u)lding is very little, the intact trace of product external surfaces, and the good airproof performance of plug, and the activity performance is good.

In order to solve the problems of the technologies described above, the utility model is by the following technical solutions: a kind of improved hot flow path plug and mould, by cover half, the superimposed successively composition of dynamic model, in be provided with a plurality of die cavitys, it is characterized in that: cover half is by the hot flow path carriage, hot-fluid mouth edge cover fixed head, core fixing plate is superimposed successively, each die cavity is established core in core fixing plate, in dynamic model, establish die cavity edge cover, in the hot flow path carriage, establish the hot-fluid mouth, in hot-fluid mouth edge cover fixed head, establish hot-fluid mouth edge cover and cooling water hole, be provided with push rod in the die cavity edge cover, set-point cast gate in the core, core bottom and die cavity edge cover, the gap that push rod top surrounds constitutes die cavity.

In order to solve the problems of the technologies described above, the utility model adopts following further technical scheme:

The plug bottom of described mold cavity forming is towards a cast gate, and the feed points that the some cast gate enters die cavity is positioned at moulding plug bottom.

By above scheme as can be known, the utlity model has following advantage: 1, die cavity is built up in the dynamic model part, and the demoulding is light during die sinking, the plug blanking is smooth, has improved productivity ratio greatly; 2, push rod is built up in the outer top of product, and exhaust is unimpeded during injection moulding; 3, the some cast gate feed points that enters die cavity is positioned at the plug bottom, and cast gate is from the plug bottom feed, and the seam of plug injection mo(u)lding is very little, the intact trace of product external surfaces, and the good airproof performance of plug.

Description of drawings

Fig. 1, structural representation view of the present utility model;

Fig. 2, be the structure chart of die cavity;

Fig. 3, be the partial enlarged drawing of Fig. 2;

Fig. 4, state diagram when separating with dynamic model for cover half;

Fig. 5, be plug demoulding state diagram;

Fig. 6, be the plug demoulding state diagram that finishes.

The specific embodiment

As Fig. 1, Fig. 2, shown in Figure 3, a kind of hot flow path plug and mould, it comprises: cover half 1, dynamic model 2, top board 3, mould pin 4, front apron 5, backboard 6, cover half 1 is divided into hot flow path carriage 11, hot-fluid mouth edge cover fixed head 12, core fixing plate 13, be formed by stacking successively, hot flow path carriage 11 connects together with front apron 5 usefulness bolts, hot-fluid mouth edge cover fixed head 12, core fixing plate 13 usefulness bolts connect together, be provided with heat flux plates 14 and hot-fluid mouth 15 in the hot flow path carriage 11, be provided with awl guide pin bushing 103 in the core fixing plate 13,104, dynamic model 2 is divided into impression bolster 21 and gripper shoe 22, impression bolster 21 is provided with and bores awl guide pillar 105 that guide pin bushing 103 matches and the guide pillar 106 that matches with awl guide pin bushing 104, gripper shoe 22, mould pin 4 and backboard 6 usefulness bolts connect together, top board 3 is divided into push rod fixed head 31, push rod baffle plate 32, push rod baffle plate 32 links to each other with knock-pin 9

Hot flow path carriage 11 at cover half 1, hot-fluid mouth edge cover fixed head 12, the impression bolster 21 of core fixing plate 13 and dynamic model 2 and gripper shoe 22 the insides are provided with a plurality of die cavitys 7, each die cavity 7 is provided with core 73 in core fixing plate 13, be provided with die cavity edge cover 71 in the impression bolster 21, in die cavity edge cover 71, be provided with push rod 72, it is fixing with push rod fixed head 31 that gripper shoe 22 is passed in the lower end of push rod 72, core 73 bottoms and die cavity edge cover 71, push rod 72 tops surround certain clearance and then form die cavity 85, form plug after these die cavity 85 injection mouldings, form a cast gate 81 in the core 73, point cast gate 81 is connected with a hot-fluid mouth 15, in hot-fluid mouth edge cover fixed head 12, hot-fluid mouth edge cover 115 and cooling water hole 107 are set, the position that enters the feed points 86 of die cavity 85 can be different, can be according to the shape and the set positions of the plug of moulding in the die cavity 85, for the seam of plug injection mo(u)lding very little, the intact trace of product external surfaces, in the present embodiment, the plug bottom of die cavity 85 moulding is towards a cast gate 81, the feed points 86 that makes a cast gate 81 enter die cavity 85 is positioned at the plug bottom, point cast gate 81 lower ends undergauge moulding cast gate are gradually expected easy breakpoint 84 with fixed attention, and each parts holds together.

3 on dynamic model 2 and top board also are provided with resetting-mechanism, and this resetting-mechanism is made up of release link 102 and back-moving spring 101, and the upper end of release link 102 is arranged on the impression bolster 21 and gripper shoe 22 positions of dynamic model 2, and lower end and push rod fixed head 31 are fixing.

Injection machine will expect to inject from injection hole during use, material is by heat flux plates, hot-fluid mouth inlet point cast gate 81, inject die cavity 85 moulding plugs from the plug bottom, when injection moulding finishes die sinking, as shown in Figure 4, from core fixing plate 13 and impression bolster 21 beginning somatotypes, core 73 leaves plug earlier, cast gate is expected easy breakpoint 84 fractures with fixed attention, and plug is stayed in the die cavity edge cover 71; As shown in Figure 5, knock-pin 9 promotes top board 3 under the injection machine push rod promotes, push rod 72 is travelled forward, thereby plug is ejected die cavity edge cover 71, and plug all comes off automatically, as shown in Figure 6, after the injection machine push rod resetted, top board 3 resetted under the effect of spring 101, finished whole injection moulding process.

Claims

1, a kind of improved hot flow path plug and mould, by cover half (1), the superimposed successively composition of dynamic model (2), in be provided with a plurality of die cavitys (7), it is characterized in that: cover half (1) is by hot flow path carriage (11), hot-fluid mouth edge cover fixed head (12), core fixing plate (13) is superimposed successively, each die cavity is established core (73) in core fixing plate (13), in dynamic model (2), establish die cavity edge cover (71), in hot flow path carriage (11), establish hot-fluid mouth (15), in hot-fluid mouth edge cover fixed head (12), establish hot-fluid mouth edge cover (115) and cooling water hole (107), be provided with push rod (72) in the die cavity edge cover (71), core (73) interior set-point cast gate (81), core (73) bottom and die cavity edge cover (71), the gap that push rod (72) top surrounds constitutes die cavity (85).

2, a kind of improved hot flow path plug and mould as claimed in claim 1 is characterized in that: the plug bottom of described die cavity (85) moulding is towards a cast gate (81), and the feed points (86) that some cast gate (81) enters die cavity (85) is positioned at moulding plug bottom.

3, a kind of plug and mould as claimed in claim 1 or 2 is characterized in that: described some cast gate (81) lower end undergauge moulding cast gate is gradually expected easy breakpoint (84) with fixed attention.

4, a kind of plug and mould as claimed in claim 1 or 2 is characterized in that: described push rod (72) is fixing with top board (3), is provided with a resetting-mechanism between dynamic model (2) and top board (3).

5, a kind of plug and mould as claimed in claim 4 is characterized in that: described resetting-mechanism is made up of release link (102) and back-moving spring (101), and the upper end of release link (102) is arranged in the dynamic model (2), and lower end and top board (31) are fixing.