CN201261245Y

CN201261245Y - Low-voltage injection mold

Info

Publication number: CN201261245Y
Application number: CNU2008201221073U
Authority: CN
Inventors: 叶军
Original assignee: Ningbo Fangzheng Tool Co Ltd
Current assignee: Ningbo Fangzheng Tool Co Ltd
Priority date: 2008-07-22
Filing date: 2008-07-22
Publication date: 2009-06-24
Anticipated expiration: 2018-07-22

Abstract

The utility model relates to a low-pressure injection mold which comprises a fixed mold, a movable mold and a hot runner distributed on the movable mold, wherein an injection cavity is formed between the movable mold and the fixed mold, a plurality of pouring nozzles are distributed on the movable mold corresponding to the injection cavity and are respectively connected with the hot runner. The low-pressure injection mold is characterized in that radiating mold inserts are respectively sleeved on the pouring nozzles, and cooling water pipes can be also distributed on the movable mold arranged outside the radiating mold inserts. Compared with the prior art, due to the additional arrangement of the radiating mold inserts and the cooling water pipes on the pouring nozzles, the utility model has favorable cooling function on plastics at the pouring nozzles so as to avoid burning plastic fabric and effectively decrease the defective rate of inside gadgets. At the same time, a plurality of cloth-inserting needles for fixing the fabric can be distributed on the fixed mold to be densely distributed in a narrow space by utilizing the small sizes of the cloth-inserting needles so as to achieve the aims of firmly fixing the fabric on the fixed mold and further ensuring the product quality.

Description

The low-pressure injection molding mould

Technical field

The utility model relates to a kind of injection mold, specifically refers to a kind of low-pressure injection molding mould that is used for middle-size and small-size inside gadget on the injection mo(u)lding automobile.

Background technology

Along with the fast development of auto industry, the demand of automotive upholstery is also in continuous increase.This automotive upholstery is to add decorative layers such as one deck PVC skin, corium or cloth on the working of plastics surface, its traditional method for making is first injection-molded plastic spare, then with decorative fabric and working of plastics by behind the spray glue comprehensively, the effect of or vacuum compound die compound by hot pressing makes decorative fabric and working of plastics cling moulding.Show that through practice it is many that this processing method has operation, the cost height, defectives such as inside gadget difference attractive in appearance, harmful gas pollution such as methyl alcohol in the glue so now replaced by new production technology, promptly directly are injected into decorative fabric on the product surface by the low-pressure injection molding mould in addition.This low-pressure injection molding mould includes dynamic model and cover half, forms an injection molding cavity between dynamic model and cover half, is a kind of mould " the low-pressure injection molding mould " of CN2794790Y discloses as the Chinese patent notification number.In order to ensure Forming Quality, on above-mentioned dynamic model, also be provided with a plurality of cast gate nozzles usually, each cast gate nozzle links to each other with separately hot flow path, advances glue in proper order with realization.

But still find in actual use: because the plastics temperature that eject at each cast gate nozzle place is higher, if control is improper, the phenomenon that lining very easily occurs burning, thereby often cause the high drawback of product rejection rate.Moreover lining generally is fixed on the cover half by briquetting, and the volume of briquetting is bigger, be subjected to the restriction in space, generally this briquetting can't be distributed in fully lining around, promptly exist the not tight phenomenon of pressure, the result after injection moulding is finished, defective such as that the surface of decorative layer can occur is wrinkling, strike-through.

The utility model content

Technical problem to be solved in the utility model is at above-mentioned prior art present situation, and provides a kind of lining that prevents to burn and guarantee the low-pressure injection molding mould of product quality.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: this low-pressure injection molding mould comprises dynamic model, cover half and is distributed in hot flow path on the dynamic model, between described dynamic model and cover half, form an injection molding cavity, to being distributed with a plurality of cast gate nozzles on the dynamic model of injection molding cavity, each cast gate nozzle is connected in described hot flow path, it is characterized in that: described each cast gate nozzle position is equipped with the heat radiation mold insert respectively.

As further improvement of the utility model, on the dynamic model in the described heat radiation mold insert outside, also be distributed with cooling water pipe, with the temperature at further cooling cast gate nozzle position.

Described heat radiation mold insert can be designed to the cylinder-shaped structure made with the beryllium copper material, and the oral area of each cast gate nozzle is exposed to the top of this cylinder-shaped structure, has so both helped heat radiation, can satisfy the requirement of smooth charging again.

In above-mentioned each scheme, can also be distributed with a plurality of slotting cloth pins that are used for fixing lining on the described cover half.

Compared with prior art, because the utility model has been set up heat radiation mold insert and cooling water pipe at each cast gate nozzle place, thereby played good cooling effect, thereby prevented that plastics from burning the phenomenon of lining, reduced the percent defective of inside gadget effectively for the plastics at cast gate nozzle place; Utilize to insert the smaller size smaller of cloth pin simultaneously, make it in narrower space, still can gather, thereby can reach lining firmly is fixed on purpose on the cover half, further to guarantee the quality of product.

Description of drawings

Fig. 1 is the perspective view of the utility model embodiment;

Fig. 2 is the perspective exploded view of Fig. 1;

Fig. 3 be among Fig. 1 A-A to cutaway view;

Fig. 4 is the vertical view of I part among Fig. 2:

Fig. 5 be among Fig. 4 B-B to cutaway view;

Fig. 6 is the upward view of cover half among Fig. 2.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As shown in Figure 1 to Figure 3, this low-pressure injection molding mould comprises cover half 1, dynamic model 2 and the hot flow path 22 that is distributed on the dynamic model, wherein between dynamic model 2 and cover half 1, form an injection molding cavity 5, to being distributed with a plurality of cast gate nozzles 24 on the dynamic model of injection molding cavity 5, in the present embodiment, this low-pressure injection molding mould can be produced two inside gadgets 3 simultaneously, the cast gate nozzle of corresponding each inside gadget has three, each cast gate nozzle is connected in charging aperture 21 by hot flow path 22, be that example is illustrated now with one of them cast gate nozzle, see also Fig. 4 and Fig. 5, this cast gate nozzle position is equipped with heat radiation mold insert 6, here this heat radiation mold insert 6 is designed to the cylinder-shaped structure made with the beryllium copper material, the oral area of cast gate nozzle is exposed to the top of this cylinder-shaped structure, in order to have better cooling effect, on the dynamic model in these heat radiation mold insert 6 outsides, also be distributed with cooling water pipe 7, simultaneously with the temperature of further reduction cast gate nozzle oral area.

On above-mentioned cover half 1, then be distributed with a plurality of slotting cloth pins 8 that are used for fixing lining, see also Fig. 6, so that lining is positioned on the cover half 1 securely.And be fixed with compress bar 4 on the dynamic model of corresponding each slotting cloth pin, shown in Fig. 2 and 3.

During injection moulding, with slotting cloth pin 8 decorative fabric is fixed on the cover half 1 earlier, behind the matched moulds, between cover half 1 and dynamic model 2, forms above-mentioned injection molding cavity 5 routinely.Under the low pressure effect, material injects from the charging aperture 21 that is arranged in the dynamic model lower portion, under the effect of conventional hot flow path 22, material flows to each cast gate nozzle 24 through runner plate 23, and the mode of glue is advanced in employing subsequently in proper order, promptly open one of them cast gate nozzle earlier, when the solation to the second of this cast gate nozzle place ejection cast gate nozzle place, open second cast gate nozzle again, make second cast gate nozzle advance glue, and the like, until the product injection mo(u)lding.

In above-mentioned injection moulding process, during each cast gate nozzle place of glue process, through the cooling of beryllium copper mold insert 6 and cooling water pipe 7, the temperature of glue has obtained decline.Simultaneously, on above-mentioned cover half 1, also be distributed with cooling water channel 11 in order to accelerate the product cooling after the injection moulding.In case the product of injection formed is cooled to when temperature required, under the effect of oil cylinder 25, push rod 26 is produced thrust upwards, see also Fig. 3, to eject the product stripper plate, make the smooth demoulding of product.

Claims

1, a kind of low-pressure injection molding mould, comprise cover half (1), dynamic model (2) and be distributed in hot flow path (22) on the dynamic model, between described dynamic model and cover half, form an injection molding cavity (5), to being distributed with a plurality of cast gate nozzles (24) on the dynamic model of injection molding cavity, each cast gate nozzle is connected in described hot flow path (22), it is characterized in that: described each cast gate nozzle position is equipped with heat radiation mold insert (6) respectively.

2, low-pressure injection molding mould according to claim 1 is characterized in that: also be distributed with cooling water pipe (7) on the dynamic model (2) in described heat radiation mold insert (6) outside.

3, low-pressure injection molding mould according to claim 1 and 2 is characterized in that: described heat radiation mold insert (6) is designed to the cylinder-shaped structure made with the beryllium copper material, and the oral area of each cast gate nozzle (24) is exposed to the top of this cylinder-shaped structure.

4, low-pressure injection molding mould according to claim 3 is characterized in that: also be distributed with a plurality of slotting cloth pins (8) that are used for fixing lining on the described cover half (1).

5, low-pressure injection molding mould according to claim 1 and 2 is characterized in that: also be distributed with a plurality of slotting cloth pins (8) that are used for fixing lining on the described cover half (1).