CN201309233Y

CN201309233Y - Runner nozzle improved structure of injection molding machines

Info

Publication number: CN201309233Y
Application number: CNU200820146278XU
Authority: CN
Inventors: 林调会
Original assignee: XIAMEN PENGTUO PLASTIC PRODUCT CO Ltd
Current assignee: XIAMEN PENGTUO PLASTIC PRODUCT CO Ltd
Priority date: 2008-11-07
Filing date: 2008-11-07
Publication date: 2009-09-16
Anticipated expiration: 2018-11-07

Abstract

The utility model discloses a runner nozzle improved structure of injection molding machines, which is implemented by matching with a feeding plate, a nozzle mounting plate, an upper die and a lower die, wherein each runner of the nozzle mounting plate is equipped with a nozzle, each nozzle is composed of an injection needle and a body, a through hole for casing the injection needle is arranged in the body, the lateral wall of the injection needle is longitudinally provided with guide grooves which form injection passages with inner walls of the body, a cone formed at the lower end of the injection needle extends to a sprue of a cavity of the upper die. Because the nozzle of the die is assembled by the injection needle and the body which are split and can be sequentially detached or assembled on the nozzle mounting plate, condensate materials in the nozzle is easy to be cleaned, operators can replace damaged components instead of integrally detaching and replacing the nozzle when the components are damaged, thereby greatly reducing replacing cost of nozzles in molds.

Description

Injection machine runner nozzle improves structure

Technical field

The relevant a kind of injection machine mould of the utility model is meant that especially a kind of injection machine runner nozzle improves structure.

Background technology

Injection mold in the injection machine is when shaped article, and according to the size of product, removing large product is to be set to a mould one cave, and the more products mould is to adopt the multi-point mould structure.As shown in Figure 1, this injection machine mould is provided with feeding plate 1, a sprue 11 is set on it branches out a plurality of runners 21 with each chamber, cave in the corresponding mould of difference, and on each runner 21, be provided with nozzle 3 ' to remedy the machining accuracy of 1 each runner 21 on the feeding plate, thereby avoid the generation at many mouths of a river, reach the purpose of economical with materials.Cooperate shown in 2, existing nozzle 3 ' is to be arranged on the runner 21 of feeding plate 1 for holistic structure, this nozzle 3 ' is to constitute by main body 31 ' and with the heating jacket 32 ' of main body 31 ' one, in main body 31 ' and heating jacket 32 ', be provided with the feeding-passage 33 ' that communicates with runner, connect a contact platform 34 ' in addition in this heating jacket 32 ' bottom, be provided with back taper in the middle part of the contact platform 34 ' lower end and penetrate pin 35 ', the injection moulding melting charge is promptly from feeding-passage 33 ' and along penetrating the die cavity of pin 35 ' injection patrix 4 with counterdie 5 compositions.As seen this mould is to form hot flow path by the nozzle 3 ' of tool heating jacket 32 '.Along with the minimizing of resource, the competition in market, the prices of raw and semifnished materials go up significantly, and this makes an issue of on this problem of saving material with regard to being necessary very much! This also is the major reason that hot flow path produces! This hot flow path can guarantee that the whole runner from the injection machine jet expansion to cast gate all is in the condition of high temperature, makes the plastics in the runner keep fusion, does not generally need to open runner after the shutdown and takes out material with fixed attention, only need add hot flow path when starting shooting to temperature required getting final product again.Therefore adopt hot flow path to have the following advantages:

1, saves material, reduce cost; 2, shorten molding cycle, improve machine works efficient; 3, improve products surface quality and mechanical property; 4, each moulding uniform quality of multi-cavity mold; 5, improve injection-molded item surface aesthetic degree.

But present this injection nozzle structure that uses, its guide pin 35 ', heating jacket 32 ' and main body 31 ' they are the structure of one, thereby cleaning is comparatively difficult when the feeding-passage obstruction takes place; Nozzle 3 ' the price of this integrative-structure is higher relatively in addition, and one of them partly is damaged, and whole nozzle 3 ' is scrapped fully, makes the replacement cost of nozzle 3 ' improve virtually.

The utility model content

Main purpose of the present utility model provides a kind of injection machine runner nozzle and improves structure, and it makes things convenient for nozzle to coagulate the cleaning of material when guaranteeing the injection-molded item surface aesthetic, reducing waste of material, enhancing productivity, and reduces the replacement cost of nozzle.

Secondary objective of the present utility model provides a kind of injection machine runner nozzle and improves structure, and it also has the function that shortens the product molding cycle, guarantees the product molding quality.

For achieving the above object, solution of the present utility model is: a kind of injection machine runner nozzle improves structure, is to fit into flitch, nozzle installing plate, patrix and counterdie and implement; Each runner of nozzle installing plate is provided with nozzle; Wherein: this nozzle is by penetrating pin and main body combines, be provided with in the main body for penetrating the through hole that needle guard is put, penetrate and vertically offer deflector chute on the pin sidewall, this deflector chute and main body inner wall form the material feeding passage, stretch the sprue place of putting in last model control and penetrate pin lower end formation cone.

Described deflector chute is corresponding two to be set or evenly to distribute a plurality of.

The through hole at described main body middle part forms three sections of upper, middle and lower because of varying aperture, and last sector hole is the hole of convergent from top to bottom; Middle sector hole is a straight hole; Following sector hole is the necking down hole of diameter less than middle sector hole; And penetrate pin is a body of rod, and it forms three sections of upper, middle and lower because of bar directly changes, and wherein the hypomere bar forms the taper needle-valve of length greater than above-mentioned hypomere hole length; The diameter of stage casing bar and middle sector hole internal diameter are suitable, the length sum of sector hole and last sector hole during its length also is less than or equal to greater than the length of middle sector hole simultaneously; The bar of this stage casing bar directly is slightly larger than the runner bore in addition; The bar footpath of epimere bar is less than the bore of runner.

Described main body top outer rim is provided with the flange that cooperates with the nozzle installing plate, is provided with groove on the lower surface of main body.

The pin lower end of penetrating of described nozzle is to stretch to put in the sprue of last model cavity upper end funnel type, and to form the needle valve cast gate, meanwhile the lower surface of main body is to be resisted against on the upper surface of die cavity sprue.

Also be provided with a pad between described nozzle main body lower surface and the die cavity upper surface.

Each runner place of described nozzle installing plate also is provided with movable heater.

After adopting such scheme, mould nozzle of the present utility model is penetrated pin with main body assembles by split, and the two can be dismantled or assemble successively, and not only the condensation material in the nozzle is convenient to clear up; And each parts need not integral body and changes nozzle when being damaged, and only needs to change to damage parts and get final product, thereby reduces the replacement cost of nozzle in the mould greatly.

For the mould that makes injecting mechanism forms hot flow path, can also be provided with movable heater in the appropriate location of each runner of nozzle installing plate, as movable heating tube etc. is set, can realize the various advantages of hot flow path equally, to shorten the product molding cycle, to guarantee the product molding quality.

Description of drawings

Fig. 1 is the schematic diagram of the injection mold of prior art;

Fig. 2 is the injection nozzle structure schematic diagram of prior art;

Fig. 3 is the decomposing schematic representation of the utility model nozzle;

Fig. 4 penetrates the vertical view of pin for the utility model nozzle;

Fig. 5 is an enforcement schematic diagram of the present utility model.

The specific embodiment

As Fig. 3,4 and cooperate shown in Figure 5ly, injection mold of the present utility model mainly includes flitch 1, nozzle installing plate 2, nozzle 3, patrix 4 and counterdie 5; Feeding plate 1, nozzle installing plate 2, patrix 4 and counterdie 5 are vertically arranged successively; Connect the injection machine jet expansion at feeding plate 1 and be provided with a sprue 11, sprue 11 branches out the vertical runner 21 that is formed on the nozzle installing plate 2, and each runner 21 is the die cavity position of corresponding upper and

lower mould

4,5 respectively; Each runner exit is separately installed with nozzle 3.Key of the present utility model is:

This nozzle 3 is to combine with main body 32 by penetrating pin 31;

Wherein the through hole at main body 32 middle parts forms three sections of upper, middle and lower because of varying aperture, wherein goes up sector hole 321 and be the hole of convergent from top to bottom, and the formation of this bellmouth orifice is to be convenient to injection molding material enter smoothly in the nozzle 3; Middle sector hole 322 is a straight hole; Following sector hole 323 is the necking down hole of diameter less than middle sector hole 322, is therefore forming a limited step 324 between sector hole 323 and the middle sector hole 322 down; Be provided with the flange 325 that cooperates with nozzle installing plate 2 in main body 32 top outer rims in addition, and on the lower surface of main body 32, be provided with groove 326;

Penetrating pin 31 is a body of rod, cooperates shown in Figure 4ly, and this is penetrated on pin 31 sidewalls and vertically offers deflector chute 311, and this deflector chute 311 is corresponding two to be set or evenly to distribute a plurality of; This is penetrated pin 31 and forms three sections of upper, middle and lower because of bar directly changes, and wherein hypomere bar 312 forms the taper needle-valve, guarantees the injection-molded item surface aesthetic, reduces waste of material; And the length of this section bar is greater than the length of 32 times sector holes 323 of aforementioned body; And sector hole 322 internal diameters are suitable in the diameter of stage casing bar 313 and the aforementioned body 32, the length sum of sector hole 322 and last sector hole 323 during its length also is less than or equal to greater than the length of middle sector hole 322 simultaneously, the bar of this stage casing bar 313 directly is slightly larger than runner 21 bores in addition; The bar footpath of epimere bar 324 is less than the bore of runner 21.

During combination, this penetrates pin 31 is to be placed in the through hole of main body 32, its hypomere bar 312 is to convexedly stretch in main body 32 belows, epimere bar 314 convexedly stretches in main body 32 tops, stage casing bar 313 just is resisted against on the limited step 324 of main body 32, penetrating pin 31 is assembled on the runner of nozzle installing plate in the lump with main body 32 composition nozzles, the epimere bar 314 of penetrating pin 31 is to stretch to place runner, and ora terminalis is resisted against in runner 21 outlets on the stage casing bar 313, during matched moulds, pin 31 lower ends of penetrating of this nozzle 3 are to stretch to put in the sprue 411 of patrix 4 die cavities 41 upper end funnel types, to form the needle valve cast gate, meanwhile the lower surface of main body 32 is to be resisted against on the upper surface 412 of die cavity 41 sprues 411, the injection moulding melting charge can be from the material feeding passage that forms between the inwall of runner 21 by the deflector chute 311 of penetrating pin 31 and main body 32 through holes, be injected in the die cavity that patrix 4 and counterdie 5 form and carry out the product injection moulding, for further reducing injection pressure and clamp force, between nozzle 3 main bodys, 32 lower surfaces and die cavity 41 upper surfaces 412, also be provided with a pad 6, and the setting of main body 32 lower surface grooves 326 promptly is to reduce contact area and improve the set structure of sealing.

Certainly, for the mould that makes injecting mechanism forms hot flow path, can also be provided with movable heater in the appropriate location of each runner 21 of nozzle installing plate 2, as movable heating tube etc. is set, can realize the various advantages of hot flow path equally, to shorten the product molding cycle, to guarantee the product molding quality.

To sum up, mould nozzle 3 of the present utility model is assembled with main body 32 by the pin 31 of penetrating of split, and the two can be dismantled or assemble successively, and not only the condensation material in the nozzle 32 is convenient to cleaning; And each parts need not integral body and changes nozzle 3 when being damaged, and only needs to change to damage parts and get final product, thereby reduces the replacement cost of nozzle 3 in the mould greatly.

Claims

1, a kind of injection machine runner nozzle improves structure, is to fit into flitch, nozzle installing plate, patrix and counterdie and implement; Wherein each runner of nozzle installing plate is provided with nozzle; It is characterized in that: this nozzle is by penetrating pin and main body combines, be provided with in the main body for penetrating the through hole that needle guard is put, penetrate and vertically offer deflector chute on the pin sidewall, this deflector chute and main body inner wall form the material feeding passage, stretch the sprue place of putting in last model control and penetrate pin lower end formation cone.

2, injection machine runner nozzle as claimed in claim 1 improves structure, it is characterized in that: deflector chute is corresponding two to be set or evenly to distribute a plurality of.

3, injection machine runner nozzle as claimed in claim 1 improves structure, it is characterized in that: the through hole at main body middle part forms three sections of upper, middle and lower because of varying aperture, and last sector hole is the hole of convergent from top to bottom; Middle sector hole is a straight hole; Following sector hole is the necking down hole of diameter less than middle sector hole; And penetrate pin is a body of rod, and it forms three sections of upper, middle and lower because of bar directly changes, and wherein the hypomere bar forms the taper needle-valve of length greater than above-mentioned hypomere hole length; The diameter of stage casing bar and middle sector hole internal diameter are suitable, the length sum of sector hole and last sector hole during its length also is less than or equal to greater than the length of middle sector hole simultaneously; The bar of this stage casing bar directly is slightly larger than the runner bore in addition; The bar footpath of epimere bar is less than the bore of runner.

4, improve structure as claim 1 or 3 described injection machine runner nozzles, it is characterized in that: main body top outer rim is provided with the flange that cooperates with the nozzle installing plate, is provided with groove on the lower surface of main body.

5, improve structure as claim 1 or 3 described injection machine runner nozzles, it is characterized in that: the pin lower end of penetrating of nozzle is to stretch to put in the sprue of last model cavity upper end funnel type, to form the needle valve cast gate, meanwhile the lower surface of main body is to be resisted against on the upper surface of die cavity sprue.

6, injection machine runner nozzle as claimed in claim 4 improves structure, it is characterized in that: also be provided with a pad between nozzle main body lower surface and the die cavity upper surface.

7, injection machine runner nozzle as claimed in claim 1 improves structure, and it is characterized in that: each runner place of nozzle installing plate also is provided with movable heater.