Exhaust structure of charging barrel of injection molding machine

Abstract

The utility model discloses an exhaust structure of a charging barrel of an injection molding machine, which comprises the charging barrel and a feeding screw, a feeding port is arranged at the rear end of the charging barrel, a feeding channel and an exhaust channel which are relatively independent are arranged at the feeding port, the exhaust channel is communicated with an inner cavity of the charging barrel and the outside, and materials enter the charging barrel from the feeding channel; and the independent exhaust channel is arranged at the feeding hole, so that the exhaust is smoother, and the exhaust effect is favorably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine field, more specifically, it relates to a kind of exhaust structure of injection molding machine barrel. BACKGROUND

[0002] Injection molding machine is also called injection molding machine or injection machine, it is the main molding equipment of thermoplastic or thermosetting plastic into various shapes of plastic products using plastic molding die.The exhaust effect of existing injection molding machine barrel is poor, the water vapor scattered in the material in barrel cannot be smoothly and effectively discharged, which will affect the production quality of plastic products to some extent. UTILITY MODEL CONTENT

[0003] To this end, the utility model provides an exhaust structure of injection molding machine barrel which improves exhaust effect.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] The utility model provides an exhaust structure of injection molding machine barrel, including barrel and the feeding screw rod of being located in the barrel, the rear end of barrel is equipped with feed inlet;The feed inlet is equipped with relatively independent feed channel and exhaust channel, the exhaust channel is connected with the inner chamber of barrel and outside, and material enters barrel by feed channel.

[0006] Preferably, the feed channel and exhaust channel are parallel and fixedly connected, and a partition is arranged between the two.

[0007] Preferably, the inner end of the partition extends into the feed inlet and is close to the feeding screw rod.

[0008] Preferably, the exhaust channel is arranged at the front right side of the feed channel.

[0009] Preferably, an exhaust fan is arranged at the exhaust channel, and the exhaust fan is used for exhausting air outward.

[0010] Preferably, the feed channel has a transverse metering section and a first feeding opening connected with the metering section, the metering section is arranged between the first feeding opening and the feed inlet, a metering screw rod is arranged in the metering section, and a driving motor for driving the metering screw rod to rotate is fixed outside the feed channel.

[0011] Preferably, the feed channel has a second feeding opening and a direct cavity, the direct cavity is arranged between the second feeding opening and the feed inlet;The first feeding opening and the second feeding opening are arranged along the transverse direction, a transverse sliding rail and a sliding seat matched with the transverse sliding rail are arranged at the upper end of the feed channel, and the sliding seat is used for mounting a hopper.

[0012] Preferably, the feeding channel is provided with a material detection component, and the material detection component is triggered to control the driving motor to stop rotating.

[0013] Preferably, the side wall of the barrel is provided with an exhaust hole, the exhaust hole communicates the inner cavity of the barrel with the outside, the inner port diameter of the exhaust hole is not greater than 1 mm, and the outer port diameter of the exhaust hole is not less than the inner port diameter.

[0014] Preferably, the exhaust hole is gradually inclined from inside to outside and rearward, or the exhaust hole is downward or inclined downward from inside to outside.

[0015] Preferably, the barrel has the following effects: the exhaust channel communicates the inner cavity of the barrel with the outside, the material is injected into the barrel through the feeding channel, the gas in the barrel can be discharged through the exhaust channel and the feeding channel when the barrel works, the exhaust capacity is increased, and the exhaust is smooth due to the independent exhaust channel arranged at the feeding port, and the material can avoid blocking the gas when the exhaust and the feeding share one channel, so that the scheme in the application can make the exhaust smooth and be beneficial to improving the exhaust effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings needed to be used in the specific embodiments or prior art description. In the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0017] Figure 1 is a structural schematic view of the embodiment one in the present application;

[0018] Figure 2 is a structural schematic view of the embodiment two in the present application;

[0019] Figure 3 is a structural schematic view of the embodiment three in the present application.

[0020] The reference numerals shown in the drawings are: 1, barrel; 12, feeding screw; 13, feeding port; 2, feeding channel; 21, exhaust channel; 22, first feeding port; 23, material detection component; 24, second feeding port; 25, direct cavity; 3, partition plate; 4, metering section; 41, metering screw; 42, driving motor; 5, exhaust hole; 6, exhaust fan; 7, transverse sliding rail; 8, sliding seat. DETAILED DESCRIPTION

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0022] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0023] Example 1: As Figure 1 As shown, the venting structure of the injection molding machine barrel in this embodiment includes a barrel 1 and a feeding screw 12 disposed inside the barrel 1. During use, the feeding screw 12 generates a forward pushing force on the material inside the barrel 1. The rear end of the barrel 1 is provided with a feed inlet 13 for adding material. The feed inlet 13 is provided with a relatively independent feed channel 2 and a venting channel 21. The venting channel 21 connects the inner cavity of the barrel 1 with the outside. Material is injected into the barrel 1 through the feed channel 2. When the barrel 1 is working, the gas inside it can be discharged through the venting channel 21 and the feed channel 2. The venting volume is large, and because the venting channel 21 is set at the feed inlet 13, the venting is smooth, which can avoid the material blocking the gas when the venting and feeding share a channel. Therefore, the solution in this embodiment can make the venting smooth and is conducive to improving the venting effect.

[0024] See appendix Figure 1 The feed channel 2 and the exhaust channel 21 are arranged side by side and fixedly connected, and a partition 3 is provided between them; the feed channel 2 and the exhaust channel 21 are installed as a whole, which is convenient to install; and during manufacturing, the inner cavity of the pipe can be divided into the feed channel 2 and the exhaust channel 21 by welding the partition 3 inside the pipe.

[0025] Since the feeding screw inside the barrel is mostly left-handed during operation, in this embodiment, it is preferable to set the exhaust channel 21 on the right front side of the feed channel 2. This can avoid material blockage at the exhaust channel 21 and help the gas in the barrel to be discharged smoothly.

[0026] Reference Appendix Figure 1 The inner end of the partition 3 extends into the feed inlet 13 and is close to the feeding screw. The material enters from the feed channel 2 and moves forward under the push of the feeding screw 12. The bottom of the partition 3 is close to the outer circumference of the feeding screw 12, so the partition 3 can better isolate the feed channel 2 and the exhaust channel 21, prevent the material from blocking the inner port of the exhaust channel 21, and make the exhaust channel 21 exhaust smoothly.

[0027] As a preferred solution, the feeding channel 2 has a transversely arranged metering section 4 and a first feeding opening 22 communicating with the metering section 4, the metering section 4 is arranged between the first feeding opening 22 and the feeding opening 13, the metering section 4 is internally provided with a metering screw 41, and a driving motor 42 is externally fixed to the feeding channel 2 to drive the rotation of the metering screw 41, the material is injected into the feeding channel 2 from the first feeding opening 22, and the material is conveyed to the feeding opening 13 by rotating the metering screw 41 driven by the driving motor 42 when the material is in the metering section 4, and the material stops conveying when the metering screw 41 stops rotating, and the amount of material added into the barrel 1 is controlled by controlling the rotation speed and number of revolutions of the metering screw 41, thereby achieving the purpose of metering and conveying.

[0028] Reference is made to the accompanying drawings Figure 1 In order to further improve the exhaust effect of the barrel 1, the barrel 1 is provided with an exhaust hole 5, which communicates the inner cavity of the barrel 1 with the outside, and the gas released from the material can be further discharged from the barrel 1 through the exhaust hole 5, thereby increasing the exhaust capacity and improving the exhaust effect. Preferably, the exhaust hole 5 is arranged at multiple positions in the axial direction of the barrel 1 to further increase the exhaust capacity. Preferably, the inner port diameter of the exhaust hole 5 is not greater than 1 mm, and can be specifically set to 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm, etc. By controlling the inner port of the exhaust hole 5 to be within a smaller size, the material can be prevented from overflowing from the exhaust hole 5 while exhausting, and the outer port of the exhaust hole 5 is not less than the diameter of the inner port, which is beneficial to the discharge of the material entering the exhaust hole 5 to avoid the blockage of the exhaust hole 5.

[0029] Further, the exhaust hole 5 is gradually inclined backward from inside to outside, and since the material is conveyed forward in the barrel 1, the exhaust hole 5 is gradually inclined backward from inside to outside, which can to some extent inhibit the material from entering the exhaust hole 5, and is helpful to reduce the overflow of the material through the exhaust hole 5.

[0030] As a variant embodiment or further optimization, the exhaust hole 5 is downward or inclined downward from inside to outside, that is, the outer port of the exhaust hole 5 is lower than the inner port in the installed state of the barrel 1, and in this way, the material entering the exhaust hole 5 can be smoothly discharged outward through the exhaust hole 5 when the barrel 1 is working.

[0031] As a further optimization, an exhaust fan 6 is arranged at the exhaust channel 21, and the exhaust fan 6 is used to exhaust air outward, which can be beneficial to quickly and fully exhaust the gas in the barrel 1 when the exhaust fan 6 is running.

[0032] As a preferred embodiment, the feeding channel 2 is equipped with a material detection component 23. When the material detection component 23 is triggered, it controls the drive motor 42 to stop rotating. In actual use, during the process of injecting material into the feeding channel 2, if the material is injected in excess and blocks the feeding channel 2, the material can trigger the material detection component 23 to output a signal, which in turn controls the drive motor 42 to stop, thus stopping the material conveying. The material detection component 23 can be a switch device or a sensor.

[0033] Example 2: Figure 2 As shown, this embodiment is a further optimization based on Embodiment 1. The feeding channel 2 has a second feeding port 24 and a direct cavity 25. The direct cavity 25 directly connects the second feeding port 24 and the feeding port 14, so that the material from the second feeding port 24 can be directly conveyed into the material cylinder 1 through the feeding port 14. The direct cavity 25 is located between the second feeding port 24 and the feeding port 13. The first feeding port 22 and the second feeding port 24 are arranged laterally at intervals, and a transverse slide rail 7 and a matching transverse slide rail 7 are fixed at the upper end of the feeding channel 2. The sliding block 8 is used to install the hopper. With this structure, in actual use, the user can move the hopper to the first feeding port 22 or the second feeding port 24 as needed, so that the material is added from the first feeding port 22 or the second feeding port 24, thereby realizing the selection and switching of metered and non-metered material conveying. When the sliding block 8 moves above the second feeding port 24, the material in the hopper is injected through the second feeding port 24 and guided through the direct cavity 25 to be conveyed directly to the feed inlet 13 without passing through the metering section 4.

[0034] Example 3: Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment does not include the metering section 4, the metering screw 41, and the drive motor 42. In this way, the material enters the material cylinder 1 directly from the feed channel 2 without being metered and conveyed by the metering screw 41. Figure 3 As shown.

[0035] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A venting structure for an injection molding machine barrel, comprising a barrel and a feeding screw disposed within the barrel, wherein a feed inlet is provided at the rear end of the barrel, characterized in that, The feed inlet is provided with a relatively independent feed channel and an exhaust channel. The exhaust channel connects the inner cavity of the material cylinder with the outside. The material enters the material cylinder through the feed channel.

2. The venting structure of the injection molding machine barrel according to claim 1, characterized in that, The feed channel and the exhaust channel are parallel and fixedly connected, and a partition is provided between them.

3. The venting structure of the injection molding machine barrel according to claim 2, characterized in that, The inner end of the partition extends into the feed inlet and is close to the feed screw.

4. The venting structure of the injection molding machine barrel according to claim 1, characterized in that, The exhaust channel is located on the right front side of the feed channel.

5. The venting structure of the injection molding machine barrel according to claim 1, characterized in that, An exhaust fan is installed at the exhaust channel, and the exhaust fan is used to draw air outward.

6. The venting structure of the injection molding machine barrel according to claim 1, characterized in that, The feeding channel has a transverse metering section and a first feeding port connected to the metering section. The metering section is located between the first feeding port and the feeding port. A metering screw is installed inside the metering section, and a drive motor for driving the metering screw to rotate is fixed outside the feeding channel.

7. The venting structure of the injection molding machine barrel according to claim 6, characterized in that, The feeding channel has a second feeding port and a direct cavity, the direct cavity being located between the second feeding port and the feeding port; the first feeding port and the second feeding port are arranged laterally at intervals, and a transverse slide rail and a slide block cooperating with the transverse slide rail are provided at the upper end of the feeding channel, the slide block being used to install the hopper.

8. The venting structure of the injection molding machine barrel according to claim 6, characterized in that, The feeding channel is equipped with a material detection component. When the material detection component is triggered, it controls the drive motor to stop rotating.

9. The venting structure of the injection molding machine barrel according to claim 1, characterized in that, The material cylinder has an exhaust hole on its side wall, which connects the inner cavity of the material cylinder to the outside. The inner port diameter of the exhaust hole is not greater than 1 mm, and the outer port diameter of the exhaust hole is not less than the inner port diameter.

10. The venting structure of the injection molding machine barrel according to claim 9, characterized in that, The exhaust port is arranged to gradually slope backward from the inside out; or, the exhaust port is arranged downward or inclined downward from the inside out.

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