CN205075296U - A mold exhaust structure and a mold with the exhaust structure - Google Patents

Abstract

The utility model discloses a mold exhaust structure, including a rear mold core and a mold core arranged above the rear mold core, a mold core support point is arranged between the rear mold core and the mold core, and an exhaust groove is arranged below the mold core support point along the edge of the connection between the rear mold core and the mold core. A plurality of vents are arranged on the rear mold core, and the vents are connected with the exhaust grooves to form an exhaust passage. The utility model also discloses a mold, which includes a panel, a nozzle plate, a fixed mold plate, a front mold core, a mold core, a rear mold core, a movable mold plate, a push rod, an ejector plate and a bottom plate from top to bottom; the exhaust structure is arranged between the mold core and the rear mold core. During the injection molding process, the utility model is in a closed state when the mold core is reset to the direction of the rear mold arrow, and the air in the glue position of the mold product flows out to the exhaust groove during injection molding, thereby playing a role in exhaust, shortening the injection molding cycle, reducing the defective rate of weld line flow marks, and improving the product qualification rate and production capacity.

Description

A mold exhaust structure and a mold with the exhaust structure

technical field

The utility model relates to mold manufacturing equipment, in particular to a mold exhaust structure and a mold with the exhaust structure.

Background technique

Injection mold is a tool for producing plastic products; it is also a tool for giving plastic products complete structure and precise dimensions. Injection molding is a processing method used in the mass production of certain complex-shaped parts. Specifically, it refers to injecting the heated and melted material into the mold cavity by high pressure, and after cooling and solidifying, a molded product is obtained.

Although the structure of the mold may vary due to the variety and performance of the plastic, the shape and structure of the plastic product, and the type of the injection machine, the basic structure is the same. The mold is mainly composed of pouring system, temperature adjustment system, molding parts and structural parts. Among them, the pouring system and molding parts are the parts that are in direct contact with the plastic and change with the plastic and the product. They are the most complex and the most changing parts in the mold, requiring the highest processing finish and precision.

The injection mold consists of a moving mold and a fixed mold. The moving mold is installed on the movable template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form the gating system and the cavity, and the movable mold and the fixed mold are separated to take out the plastic product when the mold is opened. In order to reduce the heavy workload of mold design and manufacturing, most injection molds use standard mold bases.

In the prior art, a groove-shaped air outlet is opened in the mold to discharge the original gas and the gas brought in by the melt. When the molten material is injected into the cavity, the air originally stored in the cavity and the gas brought in by the melt must be discharged out of the mold through the exhaust port at the end of the material flow, otherwise the product will have pores, poor connection, The mold is not fully filled, and even the accumulated air will burn the product due to the high temperature generated by compression. In general, the vent hole can be set either at the end of the molten material flow in the cavity or on the parting surface of the mold. The latter is to open a shallow groove with a depth of 0.03-0.2mm and a width of 1.5-6mm on one side of the die. During injection, there will not be a lot of molten material seeping out of the vent hole, because the molten material will cool and solidify there and block the channel. The opening position of the exhaust port must not face the operator to prevent the molten material from accidentally spraying out and hurting people. In addition, it is also possible to use the matching gap between the ejector rod and the ejection hole, the matching gap between the ejector block and the stripping plate and the core, etc. to exhaust. However, the delivery cycle of the injection molding of the existing mobile phone TPU protective cover is getting shorter and shorter. Under the condition of adjusting the injection molding machine, the weld line and flow marks of the product can be overcome. Normal delivery.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, provide a mold exhaust structure and a mold with the exhaust structure, shorten the injection molding cycle, and improve the qualified rate of products.

In order to achieve the above object, the technical scheme that the utility model adopts is:

A mold exhaust structure, including a rear mold core and a mold core arranged above the rear mold core, a mold core support point is set between the rear mold core and the mold core, and the lower part of the mold core support point is along the rear mold core and the mold core. Vents are provided on the edge of the joint of the mold core.

As the best embodiment of the utility model, a plurality of ventilation holes are arranged on the rear mold core of the utility model, and the ventilation holes communicate with the exhaust grooves to form exhaust passages.

As the best embodiment of the utility model, at least two mold core support points are provided on each side of the joint between the mold core and the rear mold core in the utility model.

As the best embodiment of the utility model, the width of the mold core supporting point in the utility model is 3-5 millimeters.

As the best embodiment of the utility model, the gap height between the mold core and the rear mold core of the utility model is 0.01-0.02 mm.

As the best embodiment of the utility model, the exhaust groove of the utility model is set as a concave exhaust groove.

The utility model also discloses a mold, which sequentially includes a panel, a nozzle plate, a fixed template, a front mold core, a mold core, a rear mold core, a movable template, a push rod, a thimble plate and a bottom plate from top to bottom; the mold core The exhaust structure is arranged between the rear mold core.

Compared with the prior art, the beneficial effect of the utility model is: in the injection molding process, when the mold core is reset to the closed state when the mold core is reset in the direction of the arrow of the rear mold, the air in the glue position of the mold product flows out to the exhaust groove during injection molding, thereby To the exhaust effect, shorten the injection molding cycle, reduce the defective rate of weld line flow marks, and improve the product qualification rate and production capacity.

Description of drawings

Fig. 1 is the exhaust structure schematic diagram of the present utility model;

Fig. 2 is a structural schematic diagram of part A of Fig. 1 of the utility model;

Fig. 3 is a side view of the exhaust structure of the present utility model;

Fig. 4 is the structural schematic diagram of part B of Fig. 2 of the utility model;

Fig. 5 is a structural schematic diagram of a mold with an exhaust structure of the present invention.

detailed description

The main purpose of the utility model is to overcome the deficiencies of the prior art, provide a mold exhaust structure and a mold with the exhaust structure, shorten the injection molding cycle, reduce the defect rate of weld line flow marks, and increase production capacity. The following will be described in detail with reference to the accompanying drawings in conjunction with the embodiments, so as to further explain the technical features and advantages of the present utility model.

As shown in Figures 1 and 2, a mold exhaust structure includes a rear mold core 6 and a mold core 5 arranged above the rear mold core 6, and a mold core support point is set between the rear mold core 6 and the mold core 5 12. Below the support point 12 of the mold core, an exhaust groove 11 is arranged along the edge of the joint between the rear mold core 6 and the mold core 5 . In addition to the exhaust groove 11, a plurality of ventilation holes are arranged on the rear mold core 6 of the present invention, and the ventilation holes communicate with the exhaust groove 11 to form an exhaust passage.

In order to achieve a better supporting effect, at least two mold core support points 12 are provided on each side of the joint between the mold core 5 and the rear mold core 6 in the utility model. Preferably, the core supporting point 12 has a width of 3-5 mm.

As shown in Figures 3 and 4, the gap height between the mold core 5 and the rear mold core 6 of the utility model is 0.01-0.02 millimeters.

The exhaust groove 11 described in the utility model is set as an inner concave exhaust groove. The airflow of the whole mold is quickly discharged through the concave exhaust groove.

The utility model can be processed only on a grinding machine. The depth of the void outside the rear mold core 6 and the highest surface of the mold core support point 12 is 0.01-0.02 mm, and 3 mold core support points are left on both sides of the long direction. Leave 2 mold core support points for each, and the width of the support points is 3-5mm; after the closed state, the gap height between the mold core 6 and the mold core 5 is 0.02MM, and the mold core support point 12 prevents the mold core 5 from sinking and cannot exhaust. As a result, the air in the plastic part of the mold product flows out from the four sides in the direction of the arrow shown in Figure 1 to the 0.01-0.02mm gap in the air vent gap 13 of the air vent 11 during injection molding. to the exhaust effect.

As shown in Figure 5, the utility model also discloses a mold, which includes a panel 1, a nozzle plate 2, a fixed template 3, a front mold core 4, a mold core 5, a rear mold core 6, and a movable template 7 from top to bottom. , ejector pin 8, thimble plate 9 and bottom plate 10; the exhaust structure is set between the mold core 5 and the rear mold core 6.

The utility model is clearly and completely described through the technical solutions in the above embodiments, and it is obvious that the described embodiments are a part of the embodiments of the utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Claims (7)

1. a die venting structure, comprise rear cavity (6) and be arranged at the core rod (5) above rear cavity (6), it is characterized in that: arrange the core rod strong point (12) between described rear cavity (6) and core rod (5), the below of the core rod strong point (12) arranges air discharge duct (11) along rear cavity (6) and the edge of core rod (5) junction.

2. die venting structure according to claim 1, is characterized in that: (6) arrange multiple passage to described rear cavity, and passage is communicated with air discharge duct (11), forms exhaust passage.

3. die venting structure according to claim 1 and 2, is characterized in that: described core rod (5) at least arranges 2 core rod strong points (12) with each side of rear cavity (6) junction.

4. die venting structure according to claim 3, is characterized in that: the width of the described core rod strong point (12) is 3-5 millimeter.

5. die venting structure according to claim 4, is characterized in that: the clearance height 0.01-0.02 millimeter of described core rod (5) and rear cavity (6).

6. die venting structure according to claim 1, is characterized in that: described air discharge duct (11) is set to indent air discharge duct.

7. a mould, is characterized in that: comprise panel (1), water gap plate (2), solid plate (3), front cavity (4), core rod (5), rear cavity (6), moving platen (7), push rod (8), ejector retainner plate (9) and base plate (10) from top to bottom successively; Exhaust structure described in claim 1-6 is set between described core rod (5) and rear cavity (6).