CN202071288U

CN202071288U - Hot runner hot sprue assembly capable of directly changing color

Info

Publication number: CN202071288U
Application number: CN2011201926324U
Authority: CN
Inventors: 刘永镇
Original assignee: Bornu (xiamen) Hot Runner Technical Co Ltd
Current assignee: Bornu (xiamen) Hot Runner Technical Co Ltd
Priority date: 2011-06-09
Filing date: 2011-06-09
Publication date: 2011-12-14
Anticipated expiration: 2021-06-09

Abstract

The utility model discloses a hot runner hot sprue assembly capable of directly changing color, which comprises a hot sprue tip and an irregular nut. The hot sprue assembly is characterized in that the hot sprue tip comprises a body and a sprue tip. A straight runner is arranged in the body. The sprue tip is provided with a plurality of sub-runners communicated with the straight runner. The outlets of the sub-runners are arranged at the root of the sprue tip. The sprue tip surface at the positions of the outlets of the sub-runners is a recessed annular transition arc face. The irregular nut is sleeved on the hot sprue tip. The front end of an inner cavity of the hot sprue tip is matched with the body of the hot sprue tip. The inner surface of the tail end of the inner cavity is an inner annular reverse conical face. The outlets of the sub-runners are arranged at the root of the sprue tip, the surface of a corresponding portion adopts the recessed annular transition arc face for transition, a reflective reflux of melting plastics flushes the surface of the sprue tip so that the melting plastics at the positions without holes at the root of the sprue tip are taken away timely, and accordingly the problem that materials stagnated in the sprue tip is thoroughly resolved. Color impurities of products are reduced, color change is led to be more simple, quick, and thorough, waste of raw materials is reduced, and production efficiency and product quality are improved.

Description

The direct hot nozzle assembly of the hot flow path of colour changing

Technical field

The utility model relates to the hot runner mould technical field, relates in particular to a kind of hot nozzle assembly of hot flow path of directly colour changing.

Background technology

Hot runner mould is a plastic material injection forming mold at present commonly used, with respect to the mould of cold runner structure, has and economizes in raw materials, and shortens the product molding cycle, reduces waste product, improves the quality of products, and eliminates subsequent handling, helps advantage such as the production automation.But, at present because there is certain deficiency in design in its hot mouth structure, causes molten plastic to be stranded in hot mouth easily and chew on the position, dead angle of point (as the corner A among Fig. 1), through long-time heating and the flavescence blackout, influence the color purity of injection moulding; When changing the different colours plastics, also need to discharge a large amount of new colored plastics and remove and be stranded in the native color plastics of chewing on the point, sometimes even discharge a large amount of new raw materials and also be difficult to the raw material at this position, dead angle is thoroughly got rid of.So not only cause the waste of raw material, and also influenced production efficiency and product quality.

Summary of the invention

For overcoming the problems referred to above, the utility model proposes a kind of hot nozzle assembly of hot flow path of directly colour changing, molten plastic can be stranded on the hot mouth, can reduce product colour impurity, also make the colour changing operation simpler, quick.

For achieving the above object, the technical scheme that the utility model proposed is: the direct hot nozzle assembly of the hot flow path of colour changing, comprise the sharp-tongued and abnormity nut of a heat, and it is characterized in that: described heat is sharp-tongued to be comprised body and chews point, is provided with a straight channel in the body; The described point of chewing offers the runner that a plurality of and described straight channel communicates; The outlet of this runner is positioned at chews sharp root, this exit chew the annular transition cambered surface that sharp surface is an indent; Described abnormity nut be placed in heat sharp-tongued on, its inner chamber front end matches with hot sharp-tongued body, terminal inner surface be one be in annular inverted cone surface.

Further, the inverted cone surface of described abnormity nut inner chamber end with chew sharp root and join, form one more than or equal to 90 ° angle.

Further, described runner and straight channel form an obtuse angle, and scope is at 90 ° ~ 135 °.

Preferably, described runner can have 2,3,4,5 or 6.

The beneficial effects of the utility model: the runner outlet is positioned at chews sharp root, and the annular transition cambered surface transition of indent is adopted on its surface, relevant position, does not have the material of stagnating dead point; Inverted cone surface in the abnormity nut washes away its adverse current to the reflection of molten plastic to chew the point surface, make that chewing sharp root atresia position molten plastic can obtain upgrading in the per injection process, thereby thoroughly solve the stagnant material problem of chewing in the point again; Can reduce product colour impurity, also make the colour changing operation simpler, quick, thorough, reduce raw-material waste, improve production efficiency and product quality.

Description of drawings

Fig. 1 is the hot mouth structure schematic diagram of a kind of hot flow path of prior art;

Fig. 2 is the hot sharp-tongued structural representation of the utility model embodiment one;

Fig. 3 is the abnormity nut structural representation of the utility model embodiment one;

Fig. 4 is the hot nozzle assembly combination schematic diagram of the utility model embodiment one;

Fig. 5 is the hot sharp-tongued structural representation of the utility model embodiment two;

Fig. 6 is the abnormity nut structural representation of the utility model embodiment two;

Fig. 7 is the hot nozzle assembly combination schematic diagram of the utility model embodiment two;

Fig. 8 is the hot mouth structure operation principle of an a kind of hot flow path of the present utility model schematic diagram.

The primary clustering label declaration: 1 heat is sharp-tongued; 11 bodies; 111 straight channel; 12 chew point; 121 runners; 122 transition cambered surfaces; 2 abnormity nuts; 201 inverted cone surfaces; 3 heat are sharp-tongued; 31 bodies; 311 straight channel; 32 chew point; 321 runners; 322 transition cambered surfaces; 4 abnormity nuts; 401 inverted cone surfaces; 5 reflection plastic adverse currents.

The specific embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described further.

Shown in Fig. 2-7, be the hot nozzle assembly of hot flow path of directly colour changing of the present utility model, comprise a heat sharp-tongued 1,3 and one

abnormity nut

2,4, described heat sharp-tongued 1,3 comprises body 11,31 and chews point 12,32, is provided with a straight channel 111,311 in the body 11,31; The described point 12,32 of chewing offers the runner 121,321 that a plurality of and described straight channel 111,311 communicates; 121,321 outlets of this runner are positioned at chews point 12,32 roots, this exit chew the annular transition cambered surface 122,322 that sharp surface is an indent; Described

abnormity nut

2,4 is placed on the heat sharp-tongued 1,3, and its inner chamber front end and hot sharp-tongued body 11,31 match, terminal inner surface be one be in annular inverted cone surface 201,401.

Be depicted as the utility model embodiment one as Fig. 2-4, it is chewed point 12 and offers 3 runners 121, forms 135 ° angle with straight channel 111 respectively; Runner 121 exits chew the annular transition cambered surface 122 that sharp 12 surfaces are an indent, this annular transition cambered surface 122 forms 135 ° angle with body 11 outer surfaces.The inner chamber front end of abnormity nut 2 just is complementary with sharp-tongued body 11 external diameters of heat, its terminal inner surface be one be in the annular inverted cone surface 201, the annular transition cambered surface 122 that its root and Re Zui chew sharp 12 roots is joined, form a right angle, the molten plastic that runner 121 penetrates reflects to form adverse current through inverted cone surface 201 can wash away the annular transition cambered surface 122 of chewing point 12, in time take away the raw material of chewing on the point 12, avoid producing the material phenomenon that stagnates.

Be depicted as the utility model embodiment two as Fig. 5-7, it is chewed point 32 and offers 4 runners 321, forms 90 ° angle with straight channel 311 respectively; Runner 321 exits chew the annular transition cambered surface 322 that sharp 32 surfaces are an indent, this annular transition cambered surface 122 forms 135 ° angle with body 31 outer surfaces.The inner chamber front end of abnormity nut 4 just matches with sharp-tongued body 31 external diameters of heat, its terminal inner surface be one be in the annular inverted cone surface 401, the annular transition cambered surface 322 that its root and Re Zui chew sharp 32 roots is joined, form 135 ° angle, the molten plastic that runner 321 penetrates is through washing away the annular transition cambered surface 322 of chewing point 32 through the adverse current of inverted cone surface 401 reflections, in time take away the raw material of chewing on the point 32, avoid producing the material phenomenon that stagnates.

Wherein, what the angle of runner 121,321 and straight channel 111,311 can also be between 90 ° ~ 135 ° is arbitrarily angled, and its number can also 2,3,4,5 or 6 etc.

Operation principle of the present utility model as shown in Figure 8, with embodiment one is example, after utilization is chewed molten plastic that sharp 12 runners 121 penetrate and is run into the inverted cone surface 201 of special-shaped nut 2, the reflection plastic adverse current 5 that produces, can reflex to and chew sharp 12 roots, inverted cone surface 201 because of special-shaped nut 2 is the surfaces that are annular in simultaneously, can produce the effect of annularly flow, makes the plastics of chewing sharp 12 root atresia positions obtaining upgrading in the injection process each time.Thereby thoroughly solve the stagnant material problem of chewing in the point 12.

Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; the various variations that the utility model is made are protection domain of the present utility model in the form and details.

Claims

1. the direct hot nozzle assembly of the hot flow path of colour changing comprises the sharp-tongued and abnormity nut of a heat, it is characterized in that: described heat is sharp-tongued to be comprised body and chews point, is provided with a straight channel in the body; The described point of chewing offers the runner that a plurality of and described straight channel communicates; The outlet of this runner is positioned at chews sharp root, this exit chew the annular transition cambered surface that sharp surface is an indent; Described abnormity nut be placed in heat sharp-tongued on, its inner chamber front end matches with hot sharp-tongued body, terminal inner surface be one be in annular inverted cone surface.

2. the hot nozzle assembly of hot flow path of directly colour changing as claimed in claim 1 is characterized in that: the inverted cone surface of described abnormity nut inner chamber end with chew sharp root and join, form one more than or equal to 90 ° angle.

3. the hot nozzle assembly of hot flow path of directly colour changing as claimed in claim 1, it is characterized in that: described runner and straight channel form an obtuse angle.

4. the hot nozzle assembly of hot flow path of directly colour changing as claimed in claim 3 is characterized in that: described obtuse angle scope is 90 ° ~ 135 °.

5. the hot nozzle assembly of hot flow path of directly colour changing as claimed in claim 1 is characterized in that: described runner number is 2,3,4,5 or 6.