CN202878614U

CN202878614U - Precise injection molding mold capable of vacuumizing in mold

Info

Publication number: CN202878614U
Application number: CN 201220424544
Authority: CN
Inventors: 罗郁南
Original assignee: KUNSHAN CHENZHOU PLASTIC CO Ltd
Current assignee: KUNSHAN CHENZHOU PLASTIC CO Ltd
Priority date: 2012-08-24
Filing date: 2012-08-24
Publication date: 2013-04-17
Anticipated expiration: 2022-08-24

Abstract

The utility model discloses a precise injection molding mold capable of vacuumizing in the mold, relating to the technical field of molds. The precise injection molding mold comprises an upper mold, a movable mold and a lower mold, wherein the front plate surface of the movable mold is provided with a parting surface; a first through hole is formed on the movable mold; an air discharge duct is formed on the parting surface; the first through-hole is communicated with the air discharge duct; the upper mold is pressed against the front plate surface of the movable mold, and the lower mold is pressed against the rear plate surface of the movable mold; a cavity is formed on the lower mold, and the cavity is communicated with the first through-hole; a second through hole is formed on the lateral wall of the lower mold; and one end of the second through hole is communicated with the cavity, and the other end of the second through hole is communicated with an exhaust tube. Prior to the operations of injecting and filling, the precision injection molding mold can vacuumize the sectional cavity after the upper mold and the movable mold are connected, so that a bad phenomenon that thin plastic parts or precise plastic parts produce air holes and air bubbles while injected is reduced, and the product quality is improved.

Description

The Injection Mold of vacuum-pumping in a kind of mould

Technical field:

The utility model relates to technical field of mold, more specifically to the Injection Mold of vacuum-pumping in a kind of mould.

Background technology:

In process of injection molding, in the die cavity behind the mould matched moulds certain gas must be arranged, during mold filling, gas in the die cavity can be discharged from air discharge duct or steam vent, but when quick mold filling, melt may stop up air discharge duct and steam vent, and gas will be wrapped in the die cavity, thereby cause volume gas, plastic produces pore after causing moulding, the phenomenons such as bubble, particularly for accurate or slim moulding, it can cause poor product quality, qualification rate is low, and the pressure in the die cavity is raise rapidly because of gas compression, high pressure can cause die deformation, makes the mould local area form excessive glue, even the destruction mould, shorten die life.In addition, also lack of fill can occur, there are the problems such as very high internal stress, surface streamline, melt run, focal spot in burn plastic product, interiors of products of Compressed Gas.

The utility model content:

The purpose of this utility model is exactly the deficiency for prior art, and provide the Injection Mold of vacuum-pumping in a kind of mould, it is by before injection fillers, thereby mold cavity vacuumized reduce slim plastic or precise plastic part and produce the bad phenomenon such as pore, bubble when the injection moulding, improve the quality of products.

Technology solution of the present utility model is as follows:

The Injection Mold of vacuum-pumping comprises dynamic model, upper die and lower die in a kind of mould, on the front face of described dynamic model die joint is arranged, and forms the first through hole on the dynamic model, forms air discharge duct on the die joint, and the first through hole communicates with air discharge duct; Patrix is pressed against on the front face of dynamic model, and counterdie is pressed against on the rear plate face of dynamic model; Form cavity on the counterdie, cavity communicates with the first through hole, forms the second through hole on the sidewall of counterdie, and the second through hole one end communicates with cavity, the other end is connected with exhaust tube.

Form a circle the first seal groove around die joint on the header board of described dynamic model, be inlaid with the first sealing ring in the first seal groove, form the second seal groove around cavity on the sidewall of counterdie, be inlaid with the second sealing ring in the second seal groove, the first sealing ring is pressed against on the patrix, and the second sealing ring is pressed against on the rear plate face of dynamic model.

Described the second sealing ring is less than the first sealing ring.

The beneficial effects of the utility model are: (1), it is by in the second through hole that exhaust tube is connected to counterdie, before injection fillers, before moving platen stops matched moulds, thereby the second through hole of counterdie vacuumized the air in the dynamic model die joint is taken out, guarantee the vacuum in the die cavity after patrix and dynamic model are harmonious, reduce precise plastic part or slim plastic and when injection moulding, produce pore, the bad phenomenon such as bubble, improve the quality of products, simultaneously, can not make the pressure in the die cavity cause die deformation because gas compression raises rapidly yet, improve the mold use life-span.(2), sealing ring and the second sealing ring have guaranteed the sealing behind the matched moulds, the quality of raising product.

Description of drawings:

Below in conjunction with accompanying drawing the utility model is described further:

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the partial enlarged drawing of Fig. 1;

Fig. 3 is the angle structural representation that changes of the present utility model;

Fig. 4 is the structural representation that counterdie connects exhaust tube.

Main element symbol description: 1, patrix; 2, dynamic model; 21, die joint; 22, the first through hole; 23, air discharge duct; 3, counterdie; 31, cavity; 32, the second through hole; 4, exhaust tube; 5, the first sealing ring; 6, the second sealing ring.

The specific embodiment:

The following stated only is preferred embodiment of the present utility model, does not therefore limit protection domain of the present utility model.

Embodiment: see that Fig. 1 is to shown in Figure 4, the Injection Mold of vacuum-pumping in a kind of mould, comprise patrix 1, dynamic model 2 and counterdie 3, die joint 21 is arranged on the front face of described dynamic model 2, form the first through hole 22 on the dynamic model 2, forming air discharge duct 23, the first through holes 22 on the die joint 21 communicates with air discharge duct 23; Patrix 1 is pressed against on the front face of dynamic model 2, and counterdie 3 is pressed against on the rear plate face of dynamic model 2; Form cavity 31 on the counterdie 3, cavity 31 communicates with the first through hole 22, forms on the sidewall of counterdie 3 that the second through hole 32, the second through holes 32 1 ends communicate with cavity 31, the other end is connected with exhaust tube 4.

Form a circle the first seal groove around die joint 21 on the header board of described dynamic model 2, be inlaid with the first sealing ring 5 in the first seal groove, form the second seal groove around cavity 31 on the sidewall of counterdie 3, be inlaid with the second sealing ring 6 in the second seal groove, the first sealing ring 5 is pressed against on the patrix 1, and the second sealing ring 6 is pressed against on the rear plate face of dynamic model 2.

Described the second sealing ring 6 is less than the first sealing ring 5.

Operation principle: the exhaust tube 4 that will connect vacuum valve is connected with the second through hole 32,0.3mm position before dynamic model 2 and patrix 1 stop matched moulds, open vacuum valve and vacuumize, so that when patrix 1 and dynamic model 2 matched moulds, guarantee the vacuum of the die cavity between patrix 1 and the dynamic model 2.

Claims

1. the Injection Mold of vacuum-pumping in the mould, comprise patrix (1), dynamic model (2) and counterdie (3), it is characterized in that: die joint (21) is arranged on the front face of described dynamic model (2), form the first through hole (22) on the dynamic model (2), form air discharge duct (23) on the die joint (21), the first through hole (22) communicates with air discharge duct (23); Patrix (1) is pressed against on the front face of dynamic model (2), and counterdie (3) is pressed against on the rear plate face of dynamic model (2); Form cavity (31) on the counterdie (3), cavity (31) communicates with the first through hole (22), form the second through hole (32) on the sidewall of counterdie (3), the second through hole (32) one ends communicate with cavity (31), the other end is connected with exhaust tube (4).

2. the Injection Mold of vacuum-pumping in a kind of mould according to claim 1, it is characterized in that: form a circle the first seal groove around die joint (21) on the header board of described dynamic model (2), be inlaid with the first sealing ring (5) in the first seal groove, form the second seal groove around cavity (31) on the sidewall of counterdie (3), be inlaid with the second sealing ring (6) in the second seal groove, the first sealing ring (5) is pressed against on the patrix (1), and the second sealing ring (6) is pressed against on the rear plate face of dynamic model (2).

3. the Injection Mold of vacuum-pumping in a kind of mould according to claim 2, it is characterized in that: described the second sealing ring (6) is less than the first sealing ring (5).