CN208730263U - Needle and hot runner system with the needle - Google Patents

Abstract

The utility model discloses a kind of needle and the hot runner system with the needle.The needle has needle ontology, and the needle ontology has the top and bottom being oppositely arranged, and the lower end of the needle ontology can be corresponded to the cast gate of hot flow path；The needle also has cavity, and the cavity is formed at the lower end in the needle ontology and close to the needle ontology in seal shape.

Description

Needle and hot runner system with the needle

Technical field

The utility model relates to Hot runner Technology field more particularly to a kind of needle and the hot flow path system with the needle System.

Background technique

It is at present that hot runner plastic injection mould passes through for common die in the injection mold that Injection Industry generallys use The plastic cement products quality of hot runner system injection molding is higher, and hot runner system has saving raw material, improves production efficiency, automation The advantages that degree is high.

Hot runner system generally includes driving device, hot mouth component and needle.The needle is at least partly disposed in institute Hot mouth component internal is stated, the driving device directly or indirectly connects the upper end of the needle and drives the needle along longitudinal direction (namely up and down direction) moves back and forth, so that (its is attached for the gum outlet of the lower end closed of the needle or the unlatching hot mouth component Closely it is formed with the cast gate of hot flow path).When the needle opens the gum outlet of the hot mouth component, sizing material is melted through the hot mouth Component flows into mold cavity, and forms injection-molded item；When the needle closes the gum outlet of the hot mouth component, glue is melted The path that material flows into mold cavity through the hot mouth component is truncated.

And the needle at least end portion moves in melting sizing material, with reciprocating motion, the needle constitutes one A heat-conducting piece to continuous heat transfer at cast gate often will cause and correspond to appearance heating trace at cast gate on injection-molded item surface, Or sticking for injection-molded item occurs, influence the processing yield of injection-molded item.

Summary of the invention

To solve the above problems, the purpose of this utility model is to provide a kind of needle and the hot flow path system with the needle System.

To realize one of above-mentioned purpose of utility model, an embodiment of the present invention provides a kind of needle, the needle With needle ontology, the needle ontology has the top and bottom that are oppositely arranged, the lower end of the needle ontology can correspond to The cast gate of hot flow path；The needle also has cavity, and the cavity is formed in the needle ontology and close in seal shape At the lower end of the needle ontology.

As the further improvement of an embodiment of the present invention, the needle ontology includes main component and plug, described Main component is rod-shaped in lengthwise, on the lower end surface of main component described in the upper canyon topography Cheng Yu in cavity longitudinal direction, the plug mating At the lower end surface of the main component and seal the cavity.

As the further improvement of an embodiment of the present invention, the plug includes the lower end face paste with the main component It closes and adaptedly matches junction.

As the further improvement of an embodiment of the present invention, the lower end surface with junction and the main component is all provided with It is set to plane and the two is isometrical.

As the further improvement of an embodiment of the present invention, the outer wall of the main component is set as cylindrical；It is described The lower end surface of plug limits the lower end of the needle ontology, and the plug is set as by described under junction to the plug The circular cone shape that end face diameter is gradually reduced.

As the further improvement of an embodiment of the present invention, the plug includes protruding out the sealing for matching junction Portion, the sealing are planted in the cavity.

As the further improvement of an embodiment of the present invention, the sealing, which has, matches what junction was arranged far from described Distal face, the distal face of the sealing are at least partly set as cambered surface or by lower and upper centroclinal inclined-planes.

As the further improvement of an embodiment of the present invention, the cavity and the needle ontology are coaxial.

As the further improvement of an embodiment of the present invention, the main component has outer wall and crosses the cavity The cross section of inner wall, the cross section of the outer wall and the inner wall is in concentric circles.

To realize one of above-mentioned purpose of utility model, an embodiment of the present invention additionally provides a kind of hot runner system, The hot runner system includes the hot flow path and the needle with cast gate, and the lower end of the needle is corresponding to the cast gate.

Compared with prior art, the utility model has the following beneficial effects: by the way that the cavity is arranged, by the needle The lower end of ontology is made into hollow structure, reduces the thermal capacity of needle at the cast gate, reduces the conduction of heat of needle, from And it is corresponded on injection-molded item surface made of reducing at cast gate and a possibility that heating trace occurs, while reducing the possibility sticked Property, promote the yield of injection-molded item.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the part of the needle of an embodiment of the present invention；

Fig. 2 is the partial cutaway schematic view of the part of the needle of an embodiment of the present invention；

Fig. 3 is the cross-sectional view of the line A-A along Fig. 2；

Fig. 4 is the structural exploded view of the part of the needle of an embodiment of the present invention.

Specific embodiment

The utility model is described in detail below with reference to specific embodiment shown in the drawings.But these embodiment party Formula is not intended to limit the utility model, structure that those skilled in the art are made according to these embodiments, method or Transformation functionally is all contained in the protection scope of the utility model.

An embodiment of the present invention provides a kind of hot runner system, is applied in injection mold, the hot runner system Including driving device, flow distribution plate, hot mouth and needle.

The hot mouth is assembled in below the flow distribution plate, is formed in the flow distribution plate and the hot mouth for melting sizing material stream Dynamic hot flow path.Wherein, the hot flow path includes the assignment channel being formed in the flow distribution plate, the assignment channel have with The compatible glue inlet of injection molding machine nozzle and at least one gum outlet；The runner further includes being formed in the hot mouth Channel is transported, the hot mouth is assembled at the gum outlet, the transport channel and the assignment channel fluid communication, described Transporting channel has the corresponding cast gate to mold cavity.

Join Fig. 1, in this application, the ontology of needle 100 is set as lengthwise rod-like element comprising the first end being oppositely arranged With second end 101, the direction of second end 101 is directed toward for "lower", instead by the first end for ease of description, defining in this application It is "upper" by the direction that second end 101 is directed toward the first end, then the longitudinally of the ontology of needle 100 is also referred to as up and down Direction or longitudinal direction；It is laterally with the perpendicular direction definition of the longitudinally of 100 ontology of needle.

In this way, the first end can also be referred to as the upper end of 100 ontology of needle, second end 101 can also be referred to as valve The lower end 101 of 100 ontology of needle.

The upper end of 100 ontology of needle is connected directly or indirectly in the driving device, the lower end of 100 ontology of needle 101 pass through the flow distribution plate and are partially configured in the transport channel in the hot mouth, the lower end 101 of 100 ontology of needle The cast gate corresponding to the hot flow path.

Under the driving of the driving device, 100 longitudinally reciprocating motion of needle is to transport channel described in opening and closing of fault, tool Body: when needle 100 moves longitudinally upward, when the transport channel is opened in the lower end 101 of 100 ontology of needle, melt sizing material It can be entered in mold cavity by the transport channel；When needle 100 moves longitudinally downward, the lower end 101 of 100 ontology of needle When closing the transport channel, melting sizing material can not be entered in mold cavity by the transport channel.

Join Fig. 2, in this application, needle 100 further includes cavity 200, and cavity 200 is at lower end 101 and in sealing It is formed in shape in 100 ontology of needle.In this way, being reduced by the way that the lower end 101 of 100 ontology of needle is nearby made into hollow structure The thermal capacity of needle 100 at the cast gate reduces the conduction of heat of needle 100, thus injection-molded item surface made of reducing Occur a possibility that heating trace at upper corresponding cast gate, while reducing a possibility that sticking, promotes the yield of injection-molded item.

Further, join Fig. 3,100 ontology of needle includes main component 10 and plug 20.

Main component 10 constitutes the overwhelming majority of 100 ontology of needle and is in that lengthwise is rod-shaped, limits the institute of 100 ontology of needle State upper end.

Cavity 200 is hollowly formed in longitudinally upward on the lower end surface 12 of main component 10.

Plug 20 is coupled at the lower end surface 12 of main component 10, and sealing cavity 200.

In this way, the needle 100 of the present embodiment passes through the main component 10 and plug 20 of split settings, facilitate adding for cavity 200 Work molding, and by being sealed to cavity 200, it can avoid melting sizing material and enter in cavity 200 and sizing or hiding material is caused (can to lead Cause colour changing bad).Certainly, in alternate embodiments, also needle 100 can be processed by way of being integrally formed ground.

Wherein, join Fig. 3 and Fig. 4,100 ontology of needle and cavity 200 are coaxially disposed.Specifically, 100 ontology of needle has Along the central axes V of longitudinally, cavity 200 is set at the V of central axes and using central axes V as central axes.

Main component 10 has outer wall 11 and inner wall 13, and inner wall 13 is for crossing cavity 200.Preferably, inner wall 13 is transversal Face and the cross section of outer wall 11 are set as concentric circles, that is, cross section of the main component 10 at cavity 200 is annular in shape.In this way, It can guarantee that 100 structure of needle is uniform.

Further, join Fig. 3, plug 20 includes matching junction 22, is bonded and fits with the lower end surface 12 of main component 10 with junction 22 Match.In the present embodiment, the lower end surface 12 with junction 22 and main component 10 is disposed as plane, close convenient for fitting in this way, keeps away Exempt to melt sizing material and enter with causing sizing between junction 22 and lower end surface 12.Certainly, in other embodiments, match 22 He of junction The lower end surface 12 of main component 10 may be arranged as the three-dimensional surface to fit each other, such as cambered surface, wavy surface etc..

It is set as isometrical with the lower end surface 12 of main component 10 with junction 22, to avoid the lower end surface 12 of main component 10 and match Segment difference is formed between junction 22, guarantees that 100 body surface of needle is smooth.

Further, the lower end surface 23 of plug 20 limits the lower end 101 of 100 ontology of needle.

Plug 20 is set as the circular cone shape by being gradually reduced with junction 22 to 23 diameter of lower end surface.It is certainly, without being limited thereto, Such as: in alternate embodiments, plug 20 may also be configured to by the cylinder isometrical to lower end surface 23 with junction 22；Alternatively, Plug 20 is disposed proximate to the part cylindrical and close to lower end surface 23 of the part with junction 22 in circular cone shape, the two parts It is isometrical to connect.

The outer wall 11 of main component 10 is set as cylindrical.

Further, plug 20 further includes sealing 21, and sealing 21 is protruded out with junction 22, when plug 20 is coupled to master When on body part 10, sealing 21 is adaptedly inserted in cavity 200, with sealing cavity 200.

Preferably, the side wall of sealing 21 is with interference closely against the inner wall 13 of main component 10, thus increase sealing effect, And the mating intensity of plug 20 Yu main component 10 is reinforced, avoid plug 20 from surprisingly falling off from main component 10.

Sealing 21 also has far from the distal face 210 being arranged with junction 22, and distal face 210 is at least partly set as arc Face or inclined-plane, in the present embodiment, distal face 210 be at least partly set as inclined-plane and the inclined-plane from the near to the distant (namely by It is lower and on) to center inclination namely sealing 21 be set as up-small and down-big structure, consequently facilitating sealing 21 is inserted in cavity In 200.

Compared with prior art, the utility model has the following beneficial effects:

(1) by setting cavity 200, to reduce the thermal capacity of needle 100 at the cast gate, the heat of needle 100 is reduced There is a possibility that heating trace to corresponded at cast gate on injection-molded item surface made of reducing, while reducing hair in conduction Raw a possibility that sticking, promote the yield of injection-molded item；

(2) main component 10 and plug 20 for passing through split settings, facilitate the machine-shaping of cavity 200；

(3) by sealing cavity 200, optimize the couplings between plug 20 and main component 10, can avoid melting sizing material In into cavity 200 or enter between plug 20 and main component 10, avoids colour changing caused by expecting due to sizing or hiding bad, promoted The yield of injection-molded item.

Those listed above is described in detail the feasible embodiment only for the utility model and illustrates, it Not to limit the protection scope of the utility model, it is all without departing from equivalence enforcement side made by the utility model skill spirit Formula or change should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of needle, the needle has needle ontology, and the needle ontology has the top and bottom being oppositely arranged, described The lower end of needle ontology can be corresponded to the cast gate of hot flow path；It is characterized in that, the needle also has cavity, the cavity is in close It is formed at the lower end in the needle ontology and close to the needle ontology to envelope shape.

2. needle according to claim 1, which is characterized in that the needle ontology includes main component and plug, the master Body part is rod-shaped in lengthwise, and on the lower end surface of main component described in the upper canyon topography Cheng Yu in cavity longitudinal direction, the plug is coupled to At the lower end surface of the main component and seal the cavity.

3. needle according to claim 2, which is characterized in that the plug includes being bonded with the lower end surface of the main component Adaptedly match junction.

4. needle according to claim 3, which is characterized in that the lower end surface with junction and the main component is respectively provided with For plane and the two it is isometrical.

5. needle according to claim 3, which is characterized in that the outer wall of the main component is set as cylindrical；It is described stifled The lower end surface of head limits the lower end of the needle ontology, and the plug is set as by described with junction to the lower end of the plug The circular cone shape that face diameter is gradually reduced.

6. needle according to claim 3, which is characterized in that the plug includes protruding out the sealing for matching junction Portion, the sealing are planted in the cavity.

7. needle according to claim 6, which is characterized in that the sealing has far from described with the remote of junction setting End face, the distal face of the sealing are at least partly set as cambered surface or by lower and upper centroclinal inclined-planes.

8. needle according to claim 2, which is characterized in that the cavity and the needle ontology are coaxial.

9. needle according to claim 8, which is characterized in that the main component has outer wall and crosses the interior of the cavity The cross section of wall, the cross section of the outer wall and the inner wall is in concentric circles.

10. a kind of hot runner system, which is characterized in that the hot runner system includes that there is the hot flow path of cast gate and right to want 1~9 described in any item needles are sought, the lower end of the needle is corresponding to the cast gate.