CN205853254U - A kind of pressurize injection moulding apparatus without cast gate for injection mold - Google Patents

Abstract

The utility model discloses a pressurized injection molding device for an injection mold without a sprue. Connected, the upper end and the right end are opened; the horizontal injection port of the gate is provided with a plunger rod, one end of the plunger rod communicates with the cavity of the plastic product, and the side of the other end is provided with a cavity that can be connected with the gate; The plunger rod is movably connected in the cavity of the mould. This is a pressurized injection molding device for injection molds without a gate. The plastic product is added to a part of the plastic that originally belonged to the gate and is pushed by the plunger rod. Since the volume of the cavity forming the plastic product does not change, the plastic product and the leftover After the gate part of the mold is taken out of the mold, the resulting plastic product has increased density and no gate.

Description

A non-gate pressurized injection molding device for injection molds

technical field

The utility model relates to the technical field of mold injection molding processing, in particular to a non-gate pressurized injection molding device for injection molds.

Background technique

In the traditional injection molding process, the molten plastic injected from the nozzle of the injection molding machine enters the mold cavity through a certain channel, and the molten plastic is cooled and solidified to obtain the plastic product we need. The part connected to the plastic product is called the gate.

Contents of the invention

The purpose of this utility model is to provide a non-gate pressurized injection molding device for injection molds, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A pressurized injection molding device for an injection mold without a gate, comprising a mould, the cavity of the mold is provided with a cavity of a plastic product and a gate; the left end of the gate is connected to the cavity of the plastic product, and the upper end and The right end is open; the horizontal injection port of the gate is provided with a plunger rod, one end of the plunger rod communicates with the cavity of the plastic product, and the side of the other end is provided with a cavity that can be connected with the gate; the plunger rod The articulation is within the cavity of the mould.

As a further solution of the utility model: the gate is divided into a horizontal gate and a vertical gate, and the horizontal gate and the vertical gate are connected and have an inverted T-shaped structure.

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

This is a pressurized injection molding device for injection molds without a gate. The plastic product is increased by a part of the plastic that was originally pushed by the plunger rod, and the volume of the cavity that forms the plastic product does not change. Therefore, the plastic product Density increased. Due to the advancement of the plunger rod, the entrance of the mold cavity forming the plastic product is sealed, so that the plastic product is completely isolated from a part of the remaining gate. Due to the above two reasons, after the plastic product and the remaining gate part are taken out of the mold, the obtained plastic product has increased density and no gate.

Description of drawings

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

Fig. 2 is the original mold forming structure schematic diagram of the utility model;

Fig. 3 is the existing structural representation of the utility model;

Fig. 4 is a schematic diagram of the plunger rod propelling principle of the present invention.

In the figure: 1-plastic mold cavity, 2-gate, 3-plunger rod, 4-mold.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. 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.

Please refer to Fig. 1-2, in the embodiment of the present utility model, a kind of device for pressurized injection molding without sprue of injection mold, comprises mold 4, and the cavity of described mold 4 is provided with mold cavity 1 and sprue of plastic product 2. The left end of the gate 2 is connected to the mold cavity 1 of the plastic product, and the upper end and the right end are opened and exposed to the outside world; in the traditional injection molding process, the molten plastic injected from the nozzle of the injection molding machine enters the plastic through a certain channel. Product cavity 1, the molten plastic is cooled and solidified to obtain the plastic product we need, and the part connected to the plastic product is called gate 2.

Please refer to Fig. 3-4, in the embodiment of the present utility model, a kind of device for pressurized injection molding without sprue of injection mold, comprises mold 4, and the cavity of described mold 4 is provided with mold cavity 1 and sprue of plastic product 2. The right end of the gate 2 is connected to the cavity 1 of the plastic product, and the upper end and the right end are opened; the lateral injection port of the gate 2 is provided with a plunger rod 3, and one end of the plunger rod 3 is connected to the cavity of the plastic product. 1, and the side of the other end is provided with a cavity that can be connected to the gate 2; the plunger rod 3 is movably connected in the cavity of the mold 4.

The gate 2 is divided into a horizontal gate and a vertical gate, and the horizontal gate and the vertical gate are connected and have an inverted T-shaped structure. A plunger rod 3 is set at the entrance of the molten plastic entering the cavity of the channel forming the gate in FIG. 2 . After the injection molding machine completes the injection, the cavity 1 and the gate 2 of the plastic product are filled with plastic. When the molten plastic is not completely solidified, the plunger rod 3 is pushed toward the entrance of the cavity 1 of the plastic product under the action of external force. See Fig. 4, the plunger rod 3 advances to the position of just sealing the plastic inlet of the mold cavity 1 of the plastic product under the promotion of the external force. At this time, a part of the melted plastic in the gate 2 is pushed into the mold cavity 1 of the plastic product by the plunger rod 3 and becomes a part of the plastic product. And another part of the gate 2 is completely separated from the plastic product. Therefore, the plastic product increases the part of the plastic originally belonging to the gate pushed by the plunger rod, and the volume of the cavity forming the plastic product does not change, so the density of the plastic product increases. Due to the advancement of the plunger rod 3, the entrance of the plastic product mold cavity 1 forming the plastic product is sealed, so that the plastic product is completely isolated from a part of the remaining gate 3. After the plastic product and the left gate 2 part are taken out of the finished mold, the obtained plastic product is of increased density and without the gate 2.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (2)

1. pressurize an injection moulding apparatus without cast gate for injection mold, including mould (4), it is characterised in that: described mould (4) Plastic die cavity (1) and cast gate (2) it is provided with in cavity；The left end of described cast gate (2) is connected with plastic die cavity (1), on End and right-hand member are open-minded；The horizontal injection hole of described cast gate (2) is provided with plunger rod (3), one end of plunger rod (3) and plastic mould Chamber (1) connects, and the side opening of the other end is provided with the cavity can connected with cast gate (2)；Described plunger rod (3) is movably connected in mould (4) in cavity.

One the most according to claim 1 is pressurizeed injection moulding apparatus without cast gate for injection mold, it is characterised in that water described in: Mouth (2) is divided into horizontal cast gate and longitudinal cast gate, and horizontal cast gate connects with longitudinal cast gate, and in inverted T shape structure.