CN201712124U

CN201712124U - Heating runner mold with external heating multi-cavity

Info

Publication number: CN201712124U
Application number: CN2010202093915U
Authority: CN
Inventors: 牟维军
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-19
Filing date: 2010-05-19
Publication date: 2011-01-19
Anticipated expiration: 2020-05-19

Abstract

The utility model relates to a heating runner mold mechanism with an external heating multi-cavity, which comprises a bracket, a set screw, a compression screw, a runner sealing steel ball, a positioning screw, a fixed clamp plate, a heating channel, a hot runner plate, an expansion ring, a secondary nozzle, a pouring bush, a pouring plate, a fixed mold cavity plate, a mold core and other parts, wherein the secondary nozzle (10) is matched with the runner plate in a sliding way, the pouring bush (11) is tightly fixed in the pouring plate (12), the fixed mold cavity plate (13) is fixedly connected with the pouring plate (12), the bracket (1) and the fixed clamp plate through screws, the positioning screw (5) is connected with the hot runner plate, the set screw (2) is connected with the side face of the hot runner plate from the bracket, the runner sealing steel ball is tightly fixed in the runner plate (8) via the compression bolt (3), the expansion ring (9) is fixed in the groove of the secondary nozzle and is pressed in the concave hole of the runner plate (8) together with the secondary nozzle, the heating channel (7) is arranged on the side face of the runner plate (8) and can be processed into a through hole, and the diameter of the hole depends on the diameter of a heating rod.

Description

The many types of chamber of a kind of band external heating type adds the hot flow path mould

Technical field

The present invention relates to injecting molding die.It is a kind of mould with the many types of chamber heating of external heating type flow passage structure.

Background technology

At present, state's inner mold bound pair hot runner mould mainly adopts the following method: the adiabatic sprue of (1) well formula nozzle, it is the simplest heat-insulating runner, is applicable to monotype chamber injection mould.Since the general polyethylene that only should be used for moulding melt temperature wider range of well formula nozzle, plastics such as polypropylene, and for polystyrene, plastic shapings such as ABS are very difficult, and to polyformaldehyde, thermal sensitivity plastic shapings such as PVC-U are not suitable.(2) many types of chamber heat-insulating hot channel, difference according to cast gate is divided into the drop gate formula and puts gate type two classes, because this class mould needs to set up a shunting guidance tape during fabrication in mould, around its end face and secondary nozzle, need offer groove simultaneously, loose with the biography that reduces the melt heat, and adopt this structure, shortcoming such as difficulty when causing mould to make.(3) extension nozzle, it is an a kind of hot flow path structure that is applicable to the monotype chamber, for the plastics that prevent nozzle are passed to the lower die cavity of temperature too much, difficult control of temperature can appear, must adopt effective adiabatic measure (air and plastics thermal insulation), so just cause nozzle tip to break difficult problems such as mold cavity or distortion, shorten shortcomings such as die life.

Summary of the invention

The utility model provides the mould that the many types of chamber of a kind of external heating type adds hot flow path, it can not only possess the advantage of above-mentioned hot runner mould, and can adapt to injection of many open forms chamber and the injection of monotype chamber, and can be fit to any plastic shaping, the pressure transmission is very reliable, and mould structure is simple.

Simultaneously, the utility model is to adopt the many types of chamber of heated type to add hot flow path to heat, and has cancelled the heating plate in the general hot flow path, and it is that the heating duct is set in runner plate, insert tube heater in the hole and heat, and runner plate utilizes heat-insulating material or the air gap and mould heat insulation.Thermal sensitivity plastic shapings such as polyethylene, polypropylene, polyformaldehyde, PVC-U have been solved.Need not set up thermal insulation board and around the secondary nozzle fluting, need not control the mould temperature.Give to manufacture and design and bring great convenience, solved the difficult problem that the extension nozzle breaks mold cavity.A kind of mould structure that adds hot flow path with the many types of chamber of external heating type, be characterized in: the heating duct is set in hot runner manifold, insert the tube heater heating in the hole, it is by support, holding screw, housing screw, the runner sealed steel ball, dog screw, top clamping plate, the heating duct, hot runner manifold, packing, secondary nozzle, sprue bush, gate plate, the cover half cavity plate, compositions such as core, secondary nozzle (10) is slidingly matched with runner plate, sprue bush (11) is fastened in the gate plate (12), the same gate plate of cover half cavity plate (13) (12), support (1) top clamping plate (6) the firm connection of screw, dog screw (5) is connected with hot runner manifold, trip bolt (2) is attached to the heat flux plates side from support, the runner sealed steel ball is fastened in the runner plate (8) with housing screw (3), packing (9) is fixed in the groove of secondary nozzle, and be pressed into secondary nozzle in the shrinkage pool of runner plate (8), heating duct (7) processing is in the side of runner plate (8), can be processed into through hole, the diameter in hole is decided with the diameter of heating rod.

Description of drawings

Below in conjunction with accompanying drawing the utility model mold mechanism is further specified

Fig. 1 is the installation diagram of mould

1---support 2---holding screw 3---housing screw

4---runner sealed steel ball 5---dog screw 6---top clamping plates

7---heating duct 8---hot runner manifold 9---packings

10---secondary nozzle 11---sprue bush 12---gate plates

13---cover half cavity plate 14---core

The specific embodiment:

The many types of chamber of a kind of band external heating type adds the hot flow path mould, and it is to be provided with the heating duct in runner plate, inserts tube heater (as electrical bar etc.) heating in the hole in, thereby makes the interior plastics of runner remain molten condition.Runner plate will utilize heat-insulating material (as asbestos) or the air gap and mould remainder heat insulation, to reduce the influence of heat conduction to the mould temperature.Should consider the thermal expansion that causes owing to the runner plate variations in temperature simultaneously, so should reserve suitable expansion clearance in design.Sprue and runner Cross section Design are circular, and its diameter is got 5mm---12mm.As shown in the figure, runner plate (8) is gone up and to be inserted the heater heating in the heating duct (7), and secondary nozzle (10) is with the beallon manufacturing that thermal conductivity is good, intensity is high, in order to heat to front end.The plastics heat insulation layer thinnest part thickness of secondary nozzle front end is generally got 0.4mm---0.5mm.In addition, for being slidingly matched, and do sealing between secondary nozzle and runner plate with packing (9), thus during injection because the pressure of melt makes secondary nozzle and outer wall in the fine applying of annular contact surface place energy, can not produce flash like this." sprue bush (11) is fastened in the gate plate (12) " simultaneously, " dog screw (5) is connected with hot runner manifold; trip bolt (2) is connected to the heat flux plates side from support; the runner sealed steel ball is fastened in the shrinkage pool of runner plate (8) with housing screw (3) ", heating duct (7) processing is in the side of runner plate (8), be processed into through hole, the diameter in hole is decided with the diameter of heating rod.

Claims

1. mould structure that adds hot flow path with the many types of chamber of external heating type, be characterized in: the heating duct is set in hot runner manifold, insert the tube heater heating in the hole, it is by support, holding screw, housing screw, the runner sealed steel ball, dog screw, top clamping plate, the heating duct, hot runner manifold, packing, secondary nozzle, sprue bush, gate plate, the cover half cavity plate, compositions such as core, secondary nozzle (10) is slidingly matched with runner plate, sprue bush (11) is fastened in the gate plate (12), the same gate plate of cover half cavity plate (13) (12), support (1) top clamping plate (6) the fastening binding of screw, dog screw (5) links with hot runner manifold, trip bolt (2) is attached to the heat flux plates side from support, the runner sealed steel ball is fastened in the shrinkage pool of runner plate (8) with housing screw (3), heating duct (7) processing is in the side of runner plate (8), be processed into through hole, the diameter in hole is decided with the diameter of heating rod.