CN102794886A

CN102794886A - Valve needle device of discharging nozzle of hot runner die

Info

Publication number: CN102794886A
Application number: CN2012102354872A
Authority: CN
Inventors: 庄飞
Original assignee: JIANGSU BAIXIN ELECTRONIC EQUIPMENT CO Ltd
Current assignee: JIANGSU BAIXIN ELECTRONIC EQUIPMENT CO Ltd
Priority date: 2012-07-10
Filing date: 2012-07-10
Publication date: 2012-11-28

Abstract

The invention relates to a valve needle device of a discharging nozzle of a hot runner die. The valve needle device mainly comprises a locating ring, a valve needle body, a heating ring, a heating ring lead and a temperature sensor, wherein the valve needle body is provided with a hot runner, a spreader is arranged at the rear end of the hot runner, the valve needle is arranged in the spreader in a penetrating manner, a spring is sleeved at the rear end of the valve needle, a flange type gasket is arranged at the rear end of the spring and is fixedly connected with the valve needle, the flange type gasket and the rear end of the spring are sleeved by a heat-transfer sleeve, and the flange type gasket is arranged on a stage in the heat-transfer sleeve; a nozzle head is sleeved outside the heat-transfer sleeve, and the rear end opening part of the heat-transfer sleeve is slightly protruded out of an opening part of the nozzle head; and the temperature sensor is arranged outside the valve needle body, and the heating ring is clung to and sleeved outside the valve needle body and the temperature sensor and is fixed by the locating ring. The valve needle device has the characteristics that the front end opening part of the spreader is provided with an internally sunken cone-shaped hole and is communicated with an internal circular glue runner, the front end part of the valve needle is a cone-shaped body capable of being meshed with the internally sunken cone-shaped hole of the spreader, and the diameter of the cone-shaped body is larger than the diameter of the internally sunken cone-shaped hole at the front end of the spreader.

Description

A kind of hot runner mould discharging mouth needle device

Technical field

The present invention relates to a kind of needle device of hot runner mould discharging mouth.

Background technology

The hot runner mould forming technique is a kind of advanced technology that is applied to the injection mold running gate system, is one of focus direction of plastic pouring moulding process development.In injection mo(u)lding, use hot runner mould; Especially some are produced in enormous quantities in the multi-cavity mold of small plastic parts; Usually at the discharging mouth needle device is set, not only can controls Lou glue effectively, guarantee product quality, and avoided hot mouth mouth place to scatter and disappear because of the heat that the sizing material adhesion causes through this device; Also be that injection moulding has once more reduced the trouble of clearing up hot mouth; Improve production efficiency, therefore in the hot mouth of hot runner mould, used the needle device, become member indispensable in many mould processing technologies.But make a general survey of the hot runner mould discharging mouth needle device that adopts usually in the market, more or less have such or such problem.

For example: 1, the hot mouth of the heater of many small-sized injection mold runners distance is far away; Even in establish temperature sense and do not guarantee that also heat melts the state of temperature uniformity of thing before flowing out hot mouth; Cause the adhesiveness of hot mouth position big, reduced product quality than the adhesiveness in the runner.2, mostly discharging mouth needle device is be set to the disk shape by end; Can block the gummosis passage just, but since needle need do in process of production before and after or move up and down, and many moulds are adding man-hour for reducing cost; The stability of needle in passage is not taked stabilizing measures; (as: patent No. is: 2010202989858 utility model), though played the stabilization to needle, the difficulty of processing of firmware is bigger even the mould that has has used flange form needle stabilising arrangement; Be installed to the processing cost that has also increased mould on the mould, the later stage is changed also comparatively trouble.

Summary of the invention

A kind of hot runner mould discharging mouth needle device; Exactly for addressing the above problem disclosed a kind of hot runner mould needle device, mainly constitute by: locating ring (1), needle body (2), heating collar (3), heating collar lead-in wire (6) and temperature sensor (7); Needle body (2) comprises the hot flow path (4), the spreader (5) that places hot flow path (4) rear end that are arranged in the needle body (2), be placed through needle (8) spreader (5) solation road in, be placed on needle (8) rear end spring (9), fill up and place spring (9) rear end and the flange form pad (13) affixed with needle (8); The rear end of flange form pad (13) and spring (9) is nested with heat transfer jacket (10); Flange form pad (13) pad places on the step in the heat transfer jacket (10), and can in the inner chamber of the step front of heat transfer jacket (10), seesaw; Heat transfer jacket (10) outside is nested with nozzle head (11), and the rear end oral area of heat transfer jacket (10) slightly protrudes outside the oral area of nozzle head (11), and heat transfer jacket (10) contracts or after pressure solutions is removed, resets in can be in nozzle head (11) after receiving outside inside pressure; Temperature sensor (7) places outside the needle body (2), and the outside of needle body (2) and temperature sensor (7) is close to, is placed on to heating collar (3), and is fixing through locating ring (1); It is characterized in that: the front end oral area of spreader (5) is the type tapered hole and communicate with the interior circular solation road of establishing of caving in; Solation road internal diameter in the spreader (5) places in the solation road and the diameter of rear end part greater than needle (8), and the gap between the solation road of needle (8) and spreader (5) is that heat is melted the thing passage; The leading section of needle (8) is the cone (12) that diameter caves in the diameter of type tapered hole, also can mesh with the type tapered hole of caving in of spreader (5) greater than spreader (5) front end; It is outstanding taper foremost, and nozzle head (11) oral area goes directly in needle (8) rear end.

Advantage of the present invention: 1, not only be adapted to hot runner mould and be built on the dynamic model, also be adapted to be installed on the shower nozzle of injection machine.Because the type tapered hole design of caving in of design of the cone of needle leading section and spreader leading section;, each injection moulding can reset after accomplishing from the dynamic(al) correction needle; Continue to flow out thereby melt thing, avoid having saved raw material simultaneously because of adhesion influences product quality by heat.2, because the setting of heating collar and sensor, heat transfer jacket; Guaranteed that heat in the hot flow path melts the uniformity of thing temperature; Make heat melt thing and get in the mould, improved product quality until the adhesiveness integral uniform of condensation, even and when mould or injection machine cooling restart to produce for a long time; All need not the condensate that nozzle goes out is removed, only need to drop into production once more after the preheating of startup power supply.3, the present invention is simple in structure easy for installation, and manufacture craft is easy, and processing cost is low.

Description of drawings

Referring to accompanying drawing, be structural representation of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment, technical characterictic of the present invention is described further.

Referring to accompanying drawing, the present invention includes: locating ring (1), needle body (2), heating collar (3), hot flow path (4), spreader (5), heating collar lead-in wire (6), temperature sensor (7), needle (8), spring (9), heat transfer jacket (10), nozzle head (11), cone (12), flange form pad (13); Needle body (2) comprises the hot flow path (4), the spreader (5) that places hot flow path (4) rear end that are arranged in the needle body (2), be placed through needle (8) spreader (5) solation road in, be placed on needle (8) rear end spring (9), fill up and place spring (9) rear end and the flange form pad (13) affixed with needle (8); The rear end of flange form pad (13) and spring (9) is nested with heat transfer jacket (10); Flange form pad (13) pad places on the step in the heat transfer jacket (10), and can in the inner chamber of the step front of heat transfer jacket (10), seesaw; Heat transfer jacket (10) outside is nested with nozzle head (11), and the rear end oral area of heat transfer jacket (10) slightly protrudes outside the oral area of nozzle head (11), and heat transfer jacket (10) contracts or after pressure solutions is removed, resets in can be in nozzle head (11) after receiving outside inside pressure; Temperature sensor (7) places outside the needle body (2); The outside of needle body (2) and temperature sensor (7) is close to, is placed on to heating collar (3); Through locating ring (1) be fixed in the dynamic model or the injection machine nozzle on; Heating collar lead-in wire (6) is connected switch and power supply, and preheating reaches predetermined temperature and can put into production after the energized.

Embodiment one, and the present invention is placed in the dynamic model, contracts in the pressure of mould hot flow path inlet portion during heat transfer jacket receives behind the matched moulds; Under the promotion of flange form pad; Needle is pushed ahead, and its cone separates with the type tapered hole of caving in of spreader, and it is the solation road through the gap that hot flow path gets between spreader and the needle that heat is melted thing; And through mould runner in the nozzle head entering, and then get into die cavity.When minute mould, the heat transfer jacket pressure disappears, and heat transfer jacket resets under the effect of spring, and needle also receives the effect of spring simultaneously and resets, and the cone and the type tapered hole engagement of caving in have ended heat and melted thing and continue to flow out.

Embodiment two; The present invention is placed in the injection machine shower nozzle, and when injection machine shower nozzle contact and be pressed in the dynamic model cast gate, the heat transfer jacket of protrusion nozzle head receives in the pressure effect of dynamic model and contracting; Thereby jack-up needle; Open the solation road, heat melt thing under the interior pressure effect of injection machine, get into dynamic model and in the mould, its principle is identical with embodiment one.

Claims

1. hot runner mould discharging mouth needle device, mainly by: locating ring (1), needle body (2), heating collar (3), heating collar lead-in wire (6) and temperature sensor (7) constitute; Described needle body (2) comprises the hot flow path (4), the spreader (5) that places hot flow path (4) rear end that are arranged in the needle body (2), be placed through needle (8) spreader (5) solation road in, be placed on needle (8) rear end spring (9), fill up and place spring (9) rear end and the flange form pad (13) affixed with needle (8); The rear end of described flange form pad (13) and spring (9) is nested with heat transfer jacket (10); Flange form pad (13) pad places on the step in the heat transfer jacket (10), and can in the inner chamber of the step front of heat transfer jacket (10), seesaw; Described heat transfer jacket (10) outside is nested with nozzle head (11); The rear end oral area of described heat transfer jacket (10) slightly protrudes outside the oral area of nozzle head (11); Heat transfer jacket (10) contracts or after pressure solutions is removed, resets in can be in nozzle head (11) after receiving outside inside pressure; Described temperature sensor (7) places outside the needle body (2); The outside of needle body (2) and temperature sensor (7) is close to, is placed on to described heating collar (3); Fixing through locating ring (1); It is characterized in that: the leading section of described needle (8) is the cone (12) that diameter caves in the diameter of type tapered hole, also can mesh with the type tapered hole of caving in of spreader (5) greater than spreader (5) front end; It is outstanding taper foremost, and nozzle head (11) oral area goes directly in described needle (8) rear end.

2. a kind of hot runner mould discharging mouth needle device according to claim 1; It is characterized in that: the front end oral area of described spreader (5) is the type tapered hole and communicate with the interior circular solation road of establishing of caving in; Solation road internal diameter in the spreader (5) places in the solation road and the diameter of rear end part greater than needle (8), and the gap between the solation road of described needle (8) and spreader (5) is that heat is melted the thing passage.