CN219618389U - Gate gate - Google Patents

Abstract

The utility model discloses a gate, comprising: the back template and the sprue, the subchannel, the runner, gate and die cavity of setting on the back template, sprue and runner intercommunication, runner material outlet one end is inside to extend downwards to with the runner intercommunication to the inside slope of back template, gate and runner intercommunication, both are the contained angle setting, gate material outlet one end is inside to extend upwards to communicate with the die cavity side at the back template, the runner is a small short groove of cross section area, the cross section area of runner material outlet and gate feed inlet department all is greater than the cross section area of runner, this design is leading the runner, set up between gate and runner, cold plastic melt flows through the runner and reaches the runner, impact in the gate after converging the temperature rise in the runner of narrow, the gate is adjusted flow direction and velocity of flow of plastic melt, the plastic melt finally steadily flows into in the die cavity, avoid the plastic melt to spray the product surface and leave the gas mark because pressure and velocity of too big production when getting into the die cavity.

Description

Gate gate

Technical Field

The utility model relates to the field of injection mold gate design, in particular to a gate.

Background

The gate, also called the feed port, is the last "gate" that the plastic melt enters the cavity through the gating system, and is the feed channel connecting the runner and the cavity. Currently, the types of gates are diversified, and the selection of the gate type depends on factors such as the size and shape of the product and the kind of plastic raw material used. The automobile ornament has higher and higher requirements on appearance, however, due to the characteristics of certain injection molding materials, the structure of products and the design limit of pouring gates, the appearance surface of the products often has air mark defects after being poured by an injection molding machine, and the requirements of customers are hardly met; for example: the door handle of PC+ABS plastics often selects the tunnel type runner, and traditional tunnel type runner, runner pass through narrow runner direct intercommunication die cavity, and runner cross-section area is tiny, and when the plastics fuse-element gushed into great die cavity suddenly through narrow runner, the ejection pressure is very big, and the velocity of flow is fast, and the plastics fuse-element is unstably rushed into in the die cavity, very easily produces the vortex, leaves the gas mark at the surface of product, influences product appearance quality.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model aims to provide a gate. In order to achieve the above purpose, the present utility model is realized by the following technical scheme: a gate runner, comprising: the gate is a short groove with small cross section area, the cross section area of the material outlet of the gate and the cross section area of the material inlet of the gate are all larger than the cross section area of the gate, the cross section area of the gate is greatly reduced according to the flow direction of cold plastic melt, the cold plastic melt flows into the gate after flowing into the gate from the main flow channel, flows out of the gate after flowing into the gate after flowing out of the gate after flowing into the gate, and is dispersed and converged in the gate before finally entering the cavity after adjusting the direction and the flow speed.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the gate is arranged between the gate and the diversion channel in an extending manner at the side surface of the cavity, so that the effect of leading the gate is achieved, cold plastic melt flows through the diversion channel to reach the gate, the temperature is raised in the narrow gate in a converging manner, the fluidity of the plastic melt is improved, the plastic melt is impacted in the gate after flowing out of the gate, the gate adjusts the flowing direction and the flow velocity of the plastic melt, and finally the plastic melt smoothly flows into the cavity.

Drawings

FIG. 1 is a schematic diagram of a conventional tunnel gate structure;

FIG. 2 is a schematic diagram of the structure of the present utility model;

FIG. 3 is a schematic cross-sectional view of a partial structure of the present utility model;

FIG. 4 is a schematic cross-sectional view of a gate according to the present utility model.

In the figure: 1-a main runner; 2-a sub-runner; 21-a split-flow channel material outlet; 3-pouring gate; 4-gate; 41-gate feed inlet; 42-gate discharge port; 5-die cavity.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent and understood.

As shown in fig. 2 to 4, the present utility model provides a gate, comprising: the plastic melt injection molding machine comprises a rear template, a main runner 1, a runner 2, a gate 3, a gate 4 and a cavity 5, wherein the main runner 1 is communicated with the runner 2, the runner 2 is communicated with the gate 3, the gate 3 is communicated with the gate 4, the gate 4 is communicated with the cavity 5, the gate 3 is arranged in the rear template, one end of a runner material outlet 21 obliquely extends downwards to be communicated with the gate 3 in the rear template, the gate 4 and the gate 3 are arranged at an included angle, one end of a gate material outlet 42 obliquely extends upwards to be communicated with the side surface of the cavity 5 in the rear template, the gate 3 is a short groove with a small cross section area, the cross section area of the runner material outlet 21 and the gate material inlet 41 is larger than the cross section area of the gate 3, the cross section area of the gate 4 is greatly reduced according to the flow direction of cold plastic melt, the plastic melt flows into the runner 2 from the main runner 1, then enters the gate 3, flows out after converging in the narrow gate 3, and impacts in the gate 4 after being converged in the narrow gate 3, and finally enters the cavity 5 after the direction and flow velocity is adjusted; in the utility model, the shunt channel 2, the pouring gate 3 and the gate 4 form a V-shaped structure, the arc-shaped structure is applicable, and the wall thickness of the gate discharge port 42 at the joint of the cavity 5 can be properly adjusted according to the condition of a product in order to achieve better molding effect, and the wall thickness is set to be 2.0mm during injection molding of the product; the gate discharge port 42 has a wall thickness less than the cavity wall thickness to facilitate rapid identification of the parting line between the product and the gate forming block after forming and to facilitate later gate forming block cutting operations.

The utility model improves the traditional tunnel gate, the gate 4 is arranged on the side surface of the cavity 5 in an extending way, the gate 3 is arranged between the gate 4 and the shunt 2, the effect of leading the gate is achieved, the cold plastic melt flows through the shunt 2 to reach the gate 3, the flow of the plastic melt is increased in the narrow gate 3, the fluidity of the plastic melt is improved, the plastic melt is impacted in the gate 4 after flowing through the gate 3, the gate 4 adjusts the flowing direction and the flow velocity of the plastic melt, the flowing direction of the plastic melt is changed, the flow velocity is reduced, the plastic melt finally and stably flows into the cavity, the injection of the plastic melt due to the overlarge injection pressure and the flow velocity is effectively avoided when the plastic melt enters the cavity, and the air mark on the surface of a product is avoided; it can be understood that by increasing the gate 4 to move forward the position where the air mark is generated, the gate 4 forms a transition and protection part, and even if the air mark is generated, the air mark is also located at the gate 4, and finally the gate 4 forming block is removed by trimming, so that the appearance of the product is not affected.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (1)

1. A gate runner, comprising: back template and set up sprue (1), reposition of redundant personnel way (2), runner (3), gate (4) and die cavity (5) on the back template, sprue (1) and reposition of redundant personnel way (2) intercommunication, reposition of redundant personnel way (2) and runner (3) intercommunication, runner (3) and gate (4) intercommunication, gate (4) and die cavity (5) intercommunication, its characterized in that: the gate (3) is arranged inside the rear template, one end of the shunt outlet (21) extends downwards obliquely to be communicated with the gate (3) towards the rear template, the gate (4) is arranged at an included angle with the gate (3), one end of the gate outlet (42) extends upwards obliquely to be communicated with the side face of the cavity (5) in the rear template, the gate (3) is a short groove with small cross section area, the cross section areas of the shunt outlet (21) and the gate inlet (41) are all larger than the cross section area of the gate (3), and the cross section area of the gate (4) is reduced by large according to the flow direction of the cold plastic melt.