Injection molding device for plastic products

Abstract

The utility model discloses an injection molding device for plastic products, which comprises a machine table, an injection mechanism and a material barrel, the injection mechanism and the material barrel are arranged on the machine table, a spiral flow guide part and an air exhaust mechanism are arranged in the material barrel, the air exhaust mechanism comprises a cylinder and a fan, the cylinder and the material barrel are coaxially arranged, the material barrel comprises a barrel cover, and the fan is arranged on the barrel cover. An air outlet is formed in the barrel cover, the fan is arranged in the cylinder and used for extracting air in the charging barrel out of the charging barrel, and the guide piece is arranged on the cylinder in a sleeving mode and used for guiding plastic particles to a discharging opening of the charging barrel. According to the injection molding device, the flow guide part and the air exhaust mechanism are arranged in the material barrel, the flow guide part is used for guiding and supporting the plastic particles in the material barrel, the pressure of the plastic particles in the material barrel on the discharging opening of the material barrel can be reduced, and the discharging speed of the material barrel is increased. And the air exhaust mechanism comprises a cylinder and a fan, the fan is arranged in the cylinder and is not affected by the plastic particles, and the exhaust quality of the waste gas in the material barrel is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastics processing, specifically relates to a plastic product's injection molding device. BACKGROUND

[0002] The injection molding machine produces waste gas in the production process, and the composition and harm of the injection molding machine waste gas are mainly derived from the decomposition and volatilization of plastic raw materials in the high-temperature heating process and the volatilization of additives (such as release agent, lubricant, plasticizer, etc.). These waste gases need to be treated before being discharged to meet environmental protection requirements and reduce the impact on the environment and human health. The existing injection molding machine is provided with a fan on the inner wall of the barrel or the discharge port when extracting waste gas. In this way, not only the movement of the plastic particles in the barrel is affected, but also the air extraction effect of the fan is affected. SUMMARY

[0003] In order to solve the problem of low waste gas extraction efficiency of the barrel of the existing injection molding machine, the utility model provides an injection molding device for plastic products. The specific technical scheme of the utility model is as follows:

[0004] An injection molding device for plastic products, comprising: a machine table and an injection mechanism and a barrel provided on the machine table, the injection mechanism is horizontally arranged on the machine table, the barrel is vertically arranged above the injection mechanism, the barrel is used for providing plastic particles for the injection mechanism, the injection mechanism is used for melting and injecting the plastic particles into a plastic mold, the barrel is provided with a spiral flow guide and an air extraction mechanism, the air extraction mechanism comprises a cylinder and a fan, the cylinder is coaxially arranged with the barrel, the barrel comprises a barrel cover, the barrel cover is provided with an air outlet, the fan is arranged in the cylinder and used for extracting the gas in the barrel, the flow guide is sleeved on the cylinder and used for guiding the plastic particles to the discharge port of the barrel.

[0005] Further, the bottom of the cylinder is provided with a support frame, and the fan is arranged on the support frame.

[0006] Further, a plurality of air outlets are arranged on the cylinder wall of the cylinder.

[0007] Further, the top of the barrel cover is provided with a connecting portion for connecting with an external air pipe.

[0008] Further, the upper end of the barrel is in the shape of a cylinder, and the lower end is in the shape of a funnel.

[0009] Further, the flow guide and the cylinder are arranged inside the upper end of the barrel.

[0010] Further, a thermometer for detecting the temperature of the barrel is arranged at the lower end of the barrel.

[0011] Further, the outer side edge of the spiral flow guide is closely attached to the inner wall of the barrel, and the inner side edge is closely attached to the outer surface of the cylinder.

[0012] Compared with the prior art, the injection molding device has the advantages that the flow guide and the air extraction mechanism are arranged in the barrel, the flow guide is used for guiding and supporting the plastic particles in the barrel, the pressure of the plastic particles in the barrel on the discharge opening of the barrel is reduced, and the discharge speed of the barrel is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 FIG. 1 is a structural schematic view of an injection molding device according to an embodiment of the present application;

[0014] Figure 2 FIG. 2 is a side schematic view of the injection molding device according to the embodiment of the present application;

[0015] Figure 3 FIG. 3 is a sectional schematic view of the injection molding device according to the embodiment of the present application;

[0016] Figure 4 FIG. 4 is a schematic view of the internal structure of a barrel according to the embodiment of the present application;

[0017] Figure 5 FIG. 5 is an exploded schematic view of the barrel according to the embodiment of the present application;

[0018] Figure 6 FIG. 6 is a top view of the internal structure of the barrel according to the embodiment of the present application. DETAILED DESCRIPTION

[0019] The embodiments of the present application are described in detail below, and the embodiments are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout.

[0020] In the description of the present application, it should be noted that for the orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying 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 cannot be understood as limiting the specific protection scope of the present application.

[0021] In addition, the terms "first", "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the definition of "first", "second" features can explicitly or implicitly include one or more features, and in the description of the present application, the meaning of "at least" is one or more, unless otherwise explicitly specified and limited.

[0022] In the present application, unless otherwise specified and limited, the terms "assembly", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or it can be connected through an intermediate medium, or it can be connected between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0023] In the present application, unless otherwise specified and limited, the "first" feature is "on" or "under" the "second" feature, which can include direct contact between the first and second features, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "first" feature is "on", "under" and "above" the "second" feature, which includes the "first" feature above and obliquely above the "second" feature, or only indicates that the "first" feature is higher than the "second" feature in horizontal height. The "first" feature is "on", "under" and "below" the "second" feature, which includes the "first" feature below and obliquely below the "second" feature, or only indicates that the "first" feature is lower than the "second" feature in horizontal height.

[0024] The technical scheme of the present application and its beneficial effects will be clearer and more explicit through the further description of the specific embodiments of the present application in combination with the accompanying drawings of the specification. The following description of the embodiments by referring to the accompanying drawings is exemplary and is intended to explain the present application, but cannot be understood as a limitation of the present application.

[0025] As Figures 1 to 6As shown in the figure, an injection molding device for plastic products comprises a machine table 1, an injection mechanism 2 and a hopper 3 arranged on the machine table 1. The injection mechanism 2 is arranged horizontally on the machine table 1, and the hopper 3 is arranged vertically above the injection mechanism 2. The hopper 3 is used to provide plastic particles for the injection mechanism 2, and the injection mechanism 2 is used to melt and inject the plastic particles into a plastic mold. The hopper 3 is provided with a spiral flow guide 4 and an air extraction mechanism 5. The air extraction mechanism 5 comprises a cylinder 6 and a fan 7. The cylinder 6 is coaxially arranged with the hopper 3. The hopper 3 comprises a hopper cover 8, and the hopper cover 8 is provided with an air outlet 9. The fan 7 is arranged in the cylinder 6 to extract the gas in the hopper 3. The flow guide 4 is sleeved on the cylinder 6 to guide the plastic particles to the discharge port of the hopper 3. The plastic particles entering the hopper 3 slide along the flow guide 4 and fall to the discharge port of the hopper 3, preventing all the plastic particles in the hopper 3 from applying pressure to the discharge port of the hopper 3 and affecting the discharge of the hopper 3. The fan 7 is arranged in the cylinder 6 to protect the fan 7 from the plastic particles and improve the working efficiency of the fan 7. If the fan is arranged outside the hopper 3, the fan needs a larger suction force, which may affect the temperature in the hopper 3. If the fan 7 is arranged inside the hopper 3, the heat is transferred from the bottom plastic to the upper plastic in the hopper 3, reducing the heat loss.

[0026] As an embodiment, the bottom of the cylinder 6 is provided with a support frame 10, and the fan 7 is arranged on the support frame 10. The support frame 10 can prevent the plastic particles from affecting the fan 7 and support the fan 7.

[0027] As an embodiment, a plurality of air outlets 11 are arranged on the wall of the cylinder 6. The air flow generated by the fan 7 can be blown out of the air outlets 11 to the plastic particles on the flow guide 4, guiding the dust on the plastic particles to the outside of the hopper 3, improving the quality of the melted plastic, and further improving the injection molding quality.

[0028] As an embodiment, the top of the hopper cover 8 is provided with a connecting portion 12 for connecting with an external air pipe, facilitating the connection between the external air pipe and the hopper cover 8, and preventing waste gas leakage.

[0029] As an embodiment, the upper end 13 of the hopper 3 is in a cylindrical shape, and the lower end 14 is in a funnel shape. The air inlet of the hopper 3 can be arranged at the edge of the hopper cover 8, the upper end 13 or the lower end 14 of the hopper 3 according to actual needs.

[0030] As one of the embodiments, the flow guide 4 and the cylinder 6 are arranged inside the upper end 13 of the hopper 3. The flow guide 4 is arranged only at the upper end 13 of the hopper 3, which can reduce the rolling distance of the plastic particles while reducing the pressure. The lower end 14 of the hopper 3 is funnel-shaped. If the flow guide 4 is also arranged at the lower end 14 of the hopper 3, it is difficult to arrange the flow guide 4, the cost is high, and the effect is not obvious.

[0031] As one of the embodiments, the lower end 14 of the hopper 3 is provided with a thermometer 15 for detecting the temperature of the hopper 3. The injection molding device can adjust the wind power of the fan 7 according to the temperature in the hopper 3 to prevent the temperature in the hopper 3 from being too high or too low.

[0032] As one of the embodiments, the outer edge of the spiral flow guide 4 is tightly attached to the inner wall of the hopper 3, and the inner edge is tightly attached to the outer surface of the cylinder 6. If there is a gap between the flow guide 4 and the hopper 3 and the cylinder 6, the plastic particles are easy to be stuck in the gap.

[0033] The injection molding device described in the application is provided with a flow guide 4 and an air extraction mechanism 5 in the hopper 3. The flow guide 4 is used to guide and support the plastic particles in the hopper 3, which can reduce the pressure of the plastic particles in the hopper 3 at the discharge port of the hopper 3, and improve the discharge speed of the hopper 3. The air extraction mechanism 5 includes a cylinder 6 and a fan 7. The fan 7 is arranged in the cylinder 6 and is not affected by the plastic particles, which improves the extraction quality of the exhaust gas in the hopper 3.

[0034] In the description of the specification, the description of the terms "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the application, and the illustrative description of the above terms in the specification does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. The connection in the description of the specification has obvious effects and practical effects.

[0035] Through the above description of the structure and principle, those skilled in the art should understand that the application is not limited to the above specific embodiments, and improvements and replacements of the known technology in the art based on the application fall within the protection scope of the application, which should be limited by the claims.

Claims

1. An injection molding apparatus for plastic articles, comprising: A machine table and an injection mechanism and a material barrel arranged on the machine table, the injection mechanism is arranged transversely on the machine table, the material barrel is arranged vertically above the injection mechanism, the material barrel is used for providing plastic particles for the injection mechanism, the injection mechanism is used for melting and injecting the plastic particles into a plastic mold, characterized in that a spiral flow guide and an air extraction mechanism are arranged in the material barrel, the air extraction mechanism comprises a cylinder and a fan, the cylinder is coaxially arranged with the material barrel, the material barrel comprises a barrel cover, the barrel cover is provided with an air outlet, the fan is arranged in the cylinder and is used for extracting the gas in the barrel, and the flow guide is sleeved on the cylinder and is used for guiding the plastic particles to the discharge port of the barrel.

2. The injection molding apparatus for plastic products according to claim 1, wherein The bottom of the cylinder is provided with a support frame, and the fan is arranged on the support frame.

3. The injection molding apparatus for plastic products according to claim 2, wherein A plurality of air outlets are arranged on the cylinder wall.

4. The injection molding apparatus for plastic products according to claim 1, wherein The top of the barrel cover is provided with a connecting portion for connecting with an external air pipe.

5. The injection molding apparatus for plastic products of claim 1, wherein, The upper end of the material barrel is in a cylindrical shape, and the lower end is in a funnel shape.

6. The injection molding apparatus for plastic products according to claim 5, wherein The flow guide and the cylinder are arranged inside the upper end of the material barrel.

7. The injection molding apparatus for plastic products of claim 5, wherein, The lower end of the material barrel is provided with a thermometer for detecting the temperature of the material barrel.

8. The injection molding apparatus for plastic products of claim 1, wherein, The outer edge of the spiral flow guide is tightly fitted with the inner wall of the material barrel, and the inner edge is tightly fitted with the outer surface of the cylinder.

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