CN221233025U - Hot runner mixing device and injection screw outlet mixing equipment - Google Patents

Abstract

The utility model discloses a hot runner mixing device which comprises a hot runner body, a mixing cavity and a heater, wherein the hot runner body is connected with a split runner injection nozzle and is used for conveying external injection molding raw materials into an internal mold; the mixing cavity is in a strip shape, one end of the mixing cavity is connected with the hot runner fluid, the other end of the mixing cavity is connected with the melt injection port, a split fluid is arranged in the mixing cavity, and the split fluid splits injection molding raw materials entering the mixing cavity; the heater may heat the mixing chamber. The hot runner mixing device provided by the utility model is used for eliminating flow marks and uneven colors by repeatedly dispersing and converging through the flow paths of the molten materials with various shapes, further enhancing the mixing of the molten materials, reducing the high back pressure of a screw for mixing during pre-molding, and preventing the plastic materials from being degraded and burnt due to high-shear heating. The injection molding screw outlet mixing equipment can prevent degradation and scorching, improve the yield and reduce the production cost.

Description

Hot runner mixing device and injection screw outlet mixing equipment

Technical Field

The utility model relates to the technical field of mixing injection molding, in particular to a hot runner mixing device and injection screw outlet mixing equipment.

Background

The screw of the injection molding machine is basically a universal screw, can be suitable for most plastic raw materials for injection molding, and the plastic raw materials for injection molding usually need to be added with additives such as color master batch, toner, stabilizer filler and the like, and particularly can have the problems of incomplete plasticization and mixing for high-viscosity plastic raw materials, so that the yield is greatly influenced. In the prior art, the screw is basically adopted to generate high shear to meet plasticizing and mixing requirements when the back pressure is high, but the high shear and the high back pressure can cause the risks of degradation and burning of raw materials, and the special screw for special plastic materials is adopted to meet the requirements, so that the technical difficulty and the cost are increased.

Disclosure of Invention

According to an embodiment of the present utility model, in order to solve the above-mentioned shortcomings in the prior art, a hot runner mixing device is provided, which is disposed between a melt injection port and a split runner nozzle, and includes a hot runner body, a mixing chamber and a heater, wherein the hot runner body is connected with the split runner nozzle, and transmits an external injection molding raw material into an internal mold; the mixing cavity is in a strip shape, one end of the mixing cavity is connected with the hot runner fluid, the other end of the mixing cavity is connected with the melt injection port, a split fluid is arranged in the mixing cavity, and the split fluid splits injection molding raw materials entering the mixing cavity; the heater may heat the mixing chamber.

Preferably, the mixing chamber is connected with the hot runner body through a connecting piece.

Preferably, the heater is provided outside the connector.

Preferably, a cavity is arranged in the mixing cavity, and the split fluid is a revolution body.

Preferably, the split body is arranged in the middle of the cavity, and the distances from the periphery of the split body to the inner wall of the cavity are equal.

Preferably, the diameter of the two ends of the split is smaller than the middle diameter.

Preferably, the heater surrounds the outside of the connector.

According to the hot runner mixing device of the first embodiment of the utility model, the hot runner mixing device can be additionally arranged between the injection screw and the injection nozzle, and the hot runner mixing device can be widely used for the injection molding of the first-step process pipe blank of the one-step injection stretch blow molding machine. Through the flow path of the molten materials with various shapes, friction, repeated dispersion and confluence are used for eliminating flow marks and uneven color, further strengthening the plasticization and mixing of the molten materials, reducing the high back pressure of the screw rod used for mixing during pre-molding and preventing degradation and burning of plastic materials due to high shear heating.

According to the injection molding screw outlet mixing equipment provided by the embodiment of the utility model, the hot runner mixing device provided by the first embodiment is included, so that degradation and burning of plastic materials due to high-shear heating can be prevented, the yield is improved, and the production cost is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the technology claimed.

Drawings

Fig. 1 is a schematic view of a hot runner kneading apparatus according to a first embodiment of the present utility model.

Description of the embodiments

The preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings, which further illustrate the present utility model.

First, a hot runner mixing apparatus according to an embodiment of the present utility model will be described with reference to fig. 1, and is widely used in the field of injection molding plastic product production and the like. In this embodiment, a kneading element for injection molding of a first-stage process preform for a one-stage injection stretch blow molding machine will be described as an example.

As shown in fig. 1, a hot runner kneading apparatus according to an embodiment of the present utility model includes a hot runner body 1, a kneading chamber 2, and a heater 3.

Specifically, as shown in fig. 1, one end of a hot runner mixing device is connected with a melt injection port 4, melted raw materials enter the hot runner mixing device from the melt injection port 4, the other end of the raw materials are connected with a split runner nozzle 5 and then enter a mold 6, wherein a hot runner body 1 is connected with the split runner nozzle 5, and internal injection raw materials are conveyed into an external mold 6 through the split runner nozzle 5; the mixing cavity 2 is in a strip shape, one end of the mixing cavity is connected with the hot runner body 1, the other end of the mixing cavity is connected with the melt injection port 4 to form a passage and a space for further mixing, a split flow body 21 is arranged in the mixing cavity 2, the split flow body 21 can form a plurality of flow paths in the mixing cavity 2, injection molding raw materials entering the mixing cavity 2 are split and further recombined, the raw materials can be repeatedly dispersed and recombined, the effects of eliminating flow marks and avoiding uneven color are achieved, mixing of the melt is further enhanced, the mixing cavity 2 can be heated by the heater 3, and required heat is provided in the repeated dispersion and merging processes; the high back pressure of the screw for mixing during pre-molding is reduced, the degradation and burning of plastic materials due to high shearing heating are prevented, the defective rate is reduced, and the energy consumed in the production process is effectively saved.

Preferably, the mixing cavity 2 is connected with the hot runner body 1 through the connecting piece 7, the connecting piece 7 can play a role in connection and fixation, and further the connecting piece 7 can wrap the mixing cavity 2 in a larger area, so that the supporting performance is better, and meanwhile, the heat preservation effect on the mixing cavity 2 can be played.

Preferably, the heater 3 is arranged outside the connecting piece 7, so that heat is conveniently and uniformly transferred into the mixing cavity 2, the phenomenon of uneven heating caused by overhigh local temperature is prevented, and the problems of local scorching and the like can be caused.

Preferably, the mixing cavity 2 is internally provided with a cavity 22, and the split body 21 is a revolution body, so that the split flow channel is more uniform in split flow, the raw materials which flow conveniently are uniformly stressed and split evenly, and the mixing effect can be better.

Preferably, the split flow body 21 is arranged in the middle of the cavity 22, the distances from the periphery of the split flow body 21 to the inner wall of the cavity 22 are equal, the split flow, the combined flow and the split flow are different in paths at each stage of the combined flow, and raw materials are fully plasticized and mixed.

Preferably, the diameters of the two ends of the split flow body 21 are smaller than the diameter of the middle part, so that raw materials can be better led into the split flow channel, and the fluidity of the raw materials is improved.

Preferably, the heater 3 surrounds the outer side of the connecting body, and the surrounding effect is more uniform than that of fixed-point heating, so that heat can be more uniformly diffused into raw materials, and the purpose of uniform mixing is further improved.

When the hot runner mixing device is used, the molten raw materials pushed by the screw rod enter the hot runner mixing device through the melt injection opening 4 and not directly enter the sub-runner, but also enter the die 6 through the mixing cavity 2 and the hot runner body 1, and finally enter the die 6 through the sub-runner injection nozzle 5. In the mixing cavity 2, the molten raw material is split when passing through the split flow body 21, the split flow body 21 can be of various shapes, the split flow body has the functions of split flow, buffer and further mixing, the split flow and the confluence can be repeated in the process of further entering the hot runner, and finally, the molten raw material enters the die 6 through the split flow channel injection nozzle 5 after being fully mixed.

In the above, the hot runner mixing device according to the first embodiment of the present utility model is described with reference to fig. 1, and the hot runner mixing device can be added between the injection screw and the injection nozzle, so that the hot runner mixing device can be widely used for the injection molding and the injection molding of the first-step process pipe blank of the one-step injection stretch blow molding machine. Through the flow path of the molten materials with various shapes, friction, repeated dispersion and confluence are used for eliminating flow marks and uneven color, further strengthening the mixing of the molten materials, reducing the high back pressure of the screw rod used for mixing during pre-molding and preventing the plastic materials from being degraded and burnt due to high shear heating.

According to the injection molding screw outlet mixing equipment disclosed by the second embodiment of the utility model, the hot runner mixing device disclosed by the first embodiment is included, so that degradation and scorching of plastic materials due to high-shear heating can be prevented, the yield is improved, and the production cost is reduced.

In the description of the present utility model, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

It should be noted that in this specification the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

While the present utility model has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the utility model. Many modifications and substitutions of the present utility model will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the utility model should be limited only by the attached claims.

Claims (7)

1. A hot runner mixing apparatus disposed between a melt injection port and a manifold nozzle, comprising:

The hot runner body is connected with the split runner injection nozzle and used for conveying the external injection molding raw materials into the internal mold;

The mixing cavity is in a strip shape, one end of the mixing cavity is connected with the hot runner body, the other end of the mixing cavity is connected with the melt injection port, a split fluid is arranged in the mixing cavity, and the split fluid splits injection molding raw materials entering the mixing cavity;

And a heater for heating the mixing cavity.

2. The hot runner mixing apparatus of claim 1 wherein the mixing chamber is connected to the hot runner body by a connector.

3. A hot runner mixing apparatus as claimed in claim 2 wherein the mixing chamber is located inside the connector and the heater is located outside the connector.

4. The hot runner mixing apparatus of claim 1 wherein a cavity is provided in the mixing chamber and the split is a solid of revolution.

5. The hot runner mixing apparatus of claim 4 wherein the split is disposed in the middle of the cavity and the split is equidistant from the inner wall of the cavity about four weeks.

6. The hot runner mixing apparatus of claim 5 wherein the split has a diameter at both ends that is less than the intermediate diameter.

7. An injection screw outlet mixing apparatus comprising the hot runner mixing device of any one of claims 1 to 6.