CN204622478U - A kind of sprue bush - Google Patents

Abstract

The utility model discloses a sprue sleeve, which comprises: a sprue sleeve body, a tapered hole and a conical main flow channel are arranged at the central axis of the sprue sleeve body; the sprue sleeve body is a circular shoulder structure; The tapered hole is set at the center of the large end of the sprue sleeve, and the tapered hole expands toward the large end surface of the sprue sleeve; the tapered sprue communicates with the tapered hole, and the conical sprue It expands toward the small end of the sprue bushing body; a spherical groove is provided at the junction of the tapered hole and the tapered sprue. Through the above method, the utility model can accelerate the filling speed and flow rate of the plastic, shorten the molding cycle; the cost is low, and it is suitable for injection molding of complex and large-scale products, and has good application prospects and practical significance.

Description

A sprue sleeve

technical field

The utility model relates to the field of mechanical forming, in particular to a sprue sleeve.

Background technique

Injection mold is an important process equipment in plastic injection molding production. It is generally composed of six major systems, which form the fixed mold and moving mold parts of the mold respectively. The gating system is an important part of the six systems of the injection mold. It refers to the feed channel between the nozzle of the injection machine and the cavity in the mold. It is generally composed of a main channel, a runner, a gate and a cold material well. . The traditional sprue bushing structure, no matter it is an integral form where the sprue bushing and positioning ring are designed as one, or a split type where the sprue bushing and positioning ring are designed as two parts, the sprue bushing is connected to the nozzle of the injection machine The spherical structure of the sprue sleeve is generally set at the large end shoulder of the sprue sleeve, that is, the upper surface of the sprue sleeve and the end connected to the injection machine. In the traditional sprue sleeve structure, the length of the runner is long, resulting in a large volume of aggregate in the sprue, which wastes the consumption of plastic raw materials, and because the sprue is too long, the molding cycle is longer, which affects the injection production efficiency. Therefore, on the premise of not affecting the injection molding process and the quality of plastic parts, how to reasonably design the structure of the sprue sleeve, minimize the volume of the pouring system condensate, and reduce the consumption of plastic raw materials has great significance for reducing product production costs and improving economic benefits. significance.

Utility model content

The technical problem mainly solved by the utility model is to provide a sprue sleeve, which can speed up the filling speed and flow rate of the plastic, and shorten the molding cycle; the cost is low, and it is suitable for injection molding of complex and large-scale products, and has a good application prospect and practical significance.

In order to solve the above technical problems, a technical solution adopted by the utility model is to provide a sprue bushing, including: a sprue bushing body, a tapered hole and a tapered sprue are arranged at the central axis of the sprue bushing body; The body of the sprue sleeve is a circular shoulder structure; the tapered hole is located at the center of the large end of the sprue sleeve, and the tapered hole expands toward the large end of the sprue sleeve; the tapered sprue and The tapered hole is connected, and the tapered sprue expands toward the small end of the sprue sleeve body; a spherical groove is provided at the junction of the tapered hole and the tapered sprue.

Preferably, the depth of the tapered hole is half of the shoulder height of the sprue sleeve body, and the taper of the tapered hole is 14°~16°; the spherical radius of the spherical groove is 0.5 larger than the radius of the injection nozzle. mm~1.5mm; the taper of the conical sprue is 1°~3°, and the surface roughness of the conical sprue is 0.3μm~0.5μm.

Preferably, screw holes are distributed on the large end of the sprue sleeve body; the sprue sleeve body is fixed on the fixed mold seat plate through the screw holes, and the small end of the sprue sleeve body is installed in the female template and the female mold core .

The beneficial effects of the utility model are: the utility model can accelerate the filling speed and flow rate of the plastic, shorten the molding cycle; the cost is low, and it is suitable for the injection molding of complex and large-scale products, and has good application prospects and practical significance.

Description of drawings

Figure 1 is a schematic cross-sectional structure diagram of a preferred embodiment of a sprue sleeve of the present invention;

Fig. 2 is a schematic diagram of a top view structure of a sprue sleeve of the utility model;

The marks of the components in the attached drawings are as follows: 1. Tapered hole; 2. Spherical structure; 3. Screw hole; 4. Tapered sprue; 5. Sprue sleeve body.

Detailed ways

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, so that the protection scope of the utility model can be defined more clearly .

Please refer to Fig. 1 and Fig. 2, the utility model embodiment comprises:

A sprue sleeve, comprising: a tapered hole 1, a spherical structure 2, a screw hole 3, a conical sprue 4 and a sprue sleeve body 5; the outer surface of the sprue sleeve body 5 is a circular shoulder structure The large end of the sprue sleeve body 5 is distributed with the screw holes 3, and the center position of the sprue sleeve body 5 large ends has the tapered hole 1, and the tapered hole 1 is directed to the sprue sleeve body 5 large ends. Expansion; the spherical structure 2 connected to the injection machine is provided below the tapered hole 1; the conical sprue 4 is provided below the spherical structure 2, and the conical sprue 4 is directed to the sprue sleeve body 5 little endian expansion. The depth of the tapered hole 1 is half of the height of the shoulder, and the taper is 15°, which can better cooperate with the injection machine, and the cooperation is convenient and fast; the spherical radius of the spherical structure 2 is larger than the radius of the nozzle of the injection machine 1mm, the injection nozzle can be better aligned with the conical main channel 4 to ensure the rapid filling of plastic; the taper of the conical main channel 4 is 2°, which can effectively avoid the cooling and solidification of the plastic during circulation Blockage is caused on the pipe wall of the main channel; the surface roughness of the conical main channel 4 is 0.4 μm, which can make the molten material flow through better, and the injection molding effect is good. The sprue sleeve body 5 is fixed on the fixed mold seat plate through the screw hole 3, and the small end of the sprue sleeve body 5 is installed in the female template and the female mold core, which makes the conical main flow in the sprue sleeve body 5 The length of the channel 4 is shortened, thereby greatly reducing the aggregate volume of the gating system; at the same time, the length of the sprue sleeve body 5 is shortened to a certain extent, which can accelerate the filling speed and flow rate of the plastic, and shorten the molding cycle.

In another embodiment, a sprue bushing includes: a tapered hole 1, a spherical structure 2, a screw hole 3, a tapered sprue 4 and a sprue bushing body 5; the outer surface of the sprue bushing body 5 It is a circular shoulder structure; the large end of the sprue sleeve body 5 is distributed with the screw holes 3, and the center position of the large end of the sprue sleeve body 5 is provided with the tapered hole 1, and the tapered hole 1 is directed to The large end of the sprue sleeve body 5 is expanded; the spherical structure 2 connected with the injection machine is provided below the tapered hole 1; the conical main channel 4 is provided below the spherical structure 2, and the conical main channel The channel 4 expands towards the small end of the sprue bushing body 5 . The depth of the tapered hole 1 is half of the height of the shoulder, and the taper is 16°, which can better cooperate with the injection machine, and the cooperation is convenient and fast; the spherical radius of the spherical structure 2 is larger than the radius of the nozzle of the injection machine 1.5mm, which can better align the nozzle of the injection machine with the conical main channel 4 to ensure the rapid filling of plastic; the taper of the conical main channel 4 is 3°, which can effectively avoid the plastic flow due to cooling The solidification will cause blockage on the pipe wall of the main channel; the surface roughness of the conical main channel 4 is 0.3 μm, which can make the molten material flow through better, and the injection molding effect is good. The sprue sleeve body 5 is fixed on the fixed mold seat plate through the screw hole 3, and the small end of the sprue sleeve body 5 is installed in the female template and the female mold core, which makes the conical main flow in the sprue sleeve body 5 The length of the channel 4 is shortened, thereby greatly reducing the aggregate volume of the gating system; at the same time, the length of the sprue sleeve body 5 is shortened to a certain extent, which can accelerate the filling speed and flow rate of the plastic, and shorten the molding cycle.

The utility model can speed up the filling speed and flow rate of plastics, shorten the molding cycle; the utility model has low cost, is suitable for injection molding occasions of complex molding and large-scale products, and has good application prospects and practical significance.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the utility model specification and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (3)

1. A sprue bushing, characterized in that it comprises: a sprue bushing body, a tapered hole and a tapered sprue are arranged at the central axis of the sprue bushing body; the sprue bushing body is a circular shoulder structure The tapered hole is set at the center of the large end of the sprue sleeve, and the tapered hole expands toward the large end surface of the sprue sleeve; the tapered main channel is connected with the tapered hole, and the tapered main flow The channel expands toward the small end of the sprue sleeve body; a spherical groove is provided at the junction of the tapered hole and the tapered main channel. 2. A sprue sleeve according to claim 1, characterized in that: the depth of the tapered hole is half of the shoulder height of the sprue sleeve body, and the taper of the tapered hole is 14°~16°; The spherical radius of the spherical groove is 0.5mm-1.5mm larger than the radius of the nozzle of the injection machine; the taper of the conical main channel is 1°-3°, and the surface roughness of the conical main channel is 0.3μm-0.5μm. 3. A sprue sleeve according to claim 1, characterized in that: screw holes are distributed on the large end of the sprue sleeve body; the sprue sleeve body is fixed on the fixed mold seat plate through the screw holes, The small end of the sprue sleeve body is installed in the mother template and the female mold core.