Discharging structure of injection molding machine

Abstract

The utility model belongs to the technical field of plastic production equipment, and particularly relates to a discharging mechanism of an injection molding machine, the injection molding machine comprises an injection molding frame, a driving mechanism, the discharging mechanism and a mold closing mechanism, the discharging mechanism comprises a feeding hopper, a feeding channel and a discharging sleeve nozzle, the right end of the feeding channel is connected with the driving mechanism, and the left end of the feeding channel is connected with the discharging sleeve nozzle; the feeding hopper is mounted above the right side of the feeding channel and is connected and communicated with the interior of the feeding channel; a gravity ball (331) is arranged in the discharging sleeve nozzle, the automatic device is a gravity ball, and during discharging, the gravity ball is burst open by the plastic flow, and the plastic flow is conveyed out of the sleeve nozzle; when feeding is stopped, the gravity ball is automatically and rapidly closed, the plastic flow is timely prevented from being conveyed outwards, the structure is simple and effective, and when injection molding is stopped, flow can be rapidly cut off, and unnecessary material waste is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic production equipment, in particular to a discharging mechanism of an injection molding machine. Background Art

[0002] Chinese patent number CN218928446U discloses a material guiding structure of an injection molding machine, which includes an injection molding frame, an injection molding machine provided on the injection molding machine, a filling port opened on the injection machine, a through tube inserted at the bottom end of the injector, a sleeve slidably connected to the bottom end of the through tube, an insertion rod fixedly connected to the top end of the filling port, a retaining ring fixedly connected to the inner wall of the bottom end of the through tube, a stopper slidably inserted into the inner wall of the retaining ring, a limiting structure fixedly connected to the top end of the stopper, a connecting rod fixedly connected to the inner wall of the sleeve, and the opening and closing of the material guiding is controlled by changing the position of the stopper.

[0003] The material guiding mechanism has a complex structure and is inconvenient to operate, so it is necessary to improve this existing technology. Utility Model Content

[0004] The purpose of the utility model is to provide a discharging structure of an injection molding machine, aiming to solve the technical problems of the prior art in that the discharging structure is complex and the flow is not stopped quickly.

[0005] To achieve the above-mentioned purpose, an embodiment of the present invention provides a discharging mechanism of an injection molding machine, the main body of which includes an injection molding frame, a driving mechanism, a discharging mechanism and a clamping mechanism. The discharging mechanism includes a feed hopper, a feeding channel and a discharging nozzle. The right end of the feeding channel is connected to the driving mechanism, and the left end is connected to the discharging nozzle. The feed hopper is installed above the right side of the feeding channel and is connected to the interior of the feed channel. A gravity ball is provided inside the discharging nozzle. When discharging, the gravity ball is flushed open by the plastic flow, the nozzle is opened, and the plastic flow is transported out of the discharging nozzle. When feeding stops, the gravity ball automatically and quickly closes the nozzle to block the plastic flow from being sent out in time.

[0006] Optionally, the diameter of the gravity ball is smaller than the aperture of the discharge nozzle.

[0007] Optionally, the discharge sleeve is provided with an upper opening and a lower opening, the upper opening and the lower opening are connected to form an inner cavity, the discharge sleeve is provided with a docking portion and a discharge portion, the docking portion is provided at the upper opening of the discharge sleeve, and is connected and fixed to the end of the feeding channel and is communicated with the interior, the discharge portion is provided at the lower opening, a positioning groove for fixing the gravity ball is provided in the inner cavity, and a ball storage portion is further provided in the inner cavity at one end of the discharge sleeve away from the docking portion.

[0008] Optionally, the length of the ball storage portion is greater than the diameter of the gravity ball.

[0009] Optionally, in the inner cavity of the discharge sleeve, a downward slope from left to right is provided from the ball storage portion to the positioning groove.

[0010] Optionally, the angle of the downward slope ranges from 0 to 30 degrees.

[0011] Optionally, the positioning groove is provided with a concave edge portion that fits with the gravity ball, and the diameter of the positioning groove is smaller than the diameter of the gravity ball.

[0012] Optionally, the discharge portion of the discharge sleeve is in the shape of a cone that is wider at the top and narrower at the bottom, and the cross-section of the discharge portion is in the shape of an inverted trapezoid.

[0013] Optionally, the discharge sleeve and the end of the feed channel are provided with mutually matching threads.

[0014] The above one or more technical solutions in the discharge mechanism of the injection molding machine provided by the embodiment of the present utility model have at least one of the following technical effects: after optimizing the setting of the discharge mechanism of the injection molding machine, a gravity ball and a slope are set in the discharge mechanism. When the melted plastic in the feeding channel flows to the discharge nozzle, the gravity ball is pushed to the ball storage part, the discharge part opens, and the plastic flows out; when the plastic flow stops, the gravity ball rolls down to the positioning groove due to gravity, quickly blocks the discharge part, that is, the lower opening, stops the flow quickly, avoids waste, and has a simple structure and obvious effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 A schematic structural diagram of an injection molding machine provided in an embodiment of the present utility model;

[0017] Figure 2 A top view of an injection molding machine provided in an embodiment of the present utility model;

[0018] Figure 3 For the Figure 2 Sectional view along line AA;

[0019] Figure 4 for Figure 3 A partial enlarged view of B

[0020] Among them, the reference numerals in the figures are:

[0021] 10. Injection molding frame; 20. Driving mechanism; 30. Discharging mechanism; 31. Feed hopper; 32. Feed channel; 33. Discharging nozzle; 331. Gravity ball; 332. Upper opening; 333. Lower opening; 334. Inner cavity; 335. Docking part; 336. Discharging part; 337. Positioning groove; 3371. Concave edge; 338. Ball storage part; 339. Lower slope; 40. Clamping mechanism. DETAILED DESCRIPTION

[0022] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the embodiments of the present invention, it should be understood that if there are directional indications in the embodiments of the present invention, such as the orientation or position relationship of up, down, left, right, front, back, inside, and outside, which are based on the orientation or position relationship shown in the accompanying drawings, it is only for the convenience of describing the embodiments of the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0025] In the embodiments of the present invention, unless otherwise specified or limited, terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0026] In one embodiment of the present invention, Figures 1 to 4As shown, a discharge mechanism of an injection molding machine is provided, the main body of which includes an injection molding frame 10, a driving mechanism 20, a discharge mechanism 30 and a clamping mechanism 40. The injection molding frame 10, the driving mechanism 20 and the clamping mechanism 40 are all existing technologies, which are familiar to technicians in this technical field and will not be described in detail here.

[0027] The discharging mechanism 30 includes a feed hopper 31, a feeding channel 32, and a discharging nozzle 33. The right end of the feeding channel 32 is connected to the driving mechanism 20, and the left end is connected to the discharging nozzle 33. The feed hopper 31 is installed above the right side of the feeding channel 32 and is connected to the interior of the feeding channel 32.

[0028] It is worth noting that a heating device is also provided outside the feeding channel 32. After the plastic particles enter the feeding channel 32 from the feed hopper 31, they are heated by the heating device so that the plastic particles are melted into the plastic flow required for processing. Since this heating device is also well known to technicians in this technical field in the prior art, no further explanation will be given.

[0029] A gravity ball (331) is provided inside the discharge nozzle 33. When discharging, the gravity ball (331) is pushed open by the melted plastic flow, opening the nozzle, and the plastic flow is transported out of the discharge nozzle 33. When the feeding stops, the gravity ball (331) automatically and quickly closes the nozzle to block the plastic flow in time.

[0030] It should be noted that this gravity ball is made of high-temperature resistant and corrosion-resistant materials such as stainless steel or brass, but is not limited to stainless steel or brass; and the method of using a gravity ball for interception is suitable for the production of plastic types with high flow length ratio and low melt viscosity such as PP and PE.

[0031] Preferably, the diameter of the gravity ball 331 is smaller than the aperture of the discharge nozzle 33 , thereby ensuring that the gravity ball interacts within the discharge nozzle 33 .

[0032] Preferably, the discharge nozzle 33 is provided with an upper opening 332 and a lower opening 333, and the upper opening 332 and the lower opening 333 are connected to form an inner cavity 334. The discharge nozzle 33 is also provided with a docking portion 335 and a discharge portion 336. The docking portion 335 is provided at the upper opening 332 of the discharge nozzle 33, and is fixedly connected to the end of the feed channel 32 and is internally communicated; the discharge portion 336 is provided at the lower opening 333, and a positioning groove 337 for fixing the gravity ball 331 is provided in the inner cavity 334. A ball storage portion 338 is also provided in the inner cavity 334 at the end of the discharge nozzle 33 away from the docking portion 335, so that the gravity ball 331 can move between the positioning groove 337 and the ball storage portion 338 of this inner cavity 334.

[0033] Preferably, the length of the ball storage portion 338 is greater than the diameter of the gravity ball 331 , so that the gravity ball 331 can be completely stored in the ball storage portion, opening the lower opening 333 .

[0034] Preferably, in the inner cavity 334 of the discharge nozzle 33, a downward slope 339 is provided from left to right between the ball storage portion 338 and the positioning groove 337 to provide a rolling path for the gravity ball 331. When the plastic flow is not being conveyed, the gravity ball 331 automatically falls back to the positioning groove 337 under the action of gravity, blocking the lower opening.

[0035] Preferably, the slope of the lower slope 339 ranges from 0 to 30 degrees, with a certain slope so that the gravity ball 331 can naturally fall to the positioning groove 337 when no material is fed, but the slope cannot be too large so that the gravity ball rushes out of the positioning groove 337.

[0036] Preferably, the positioning groove 337 has a concave edge portion 3371 that can engage with the gravity ball 331 , and the diameter of the positioning groove 337 is smaller than the diameter of the gravity ball 331 , so that the gravity ball 331 fits in the positioning groove 337 and blocks the lower opening 333 .

[0037] Preferably, the discharge portion 336 of the discharge nozzle 33 is in the shape of a cone that is wider at the top and narrower at the bottom, and the cross section of the discharge portion 336 is in the shape of an inverted trapezoid, so that the plastic flow is more uniform and stable when being transported outward.

[0038] Preferably, the discharge nozzle 33 and the end of the feed channel 32 are provided with mutually matching threads, and the use of thread matching makes the sealing performance of the nozzle and the feed channel 32 better.

[0039] Working principle: When the injection molding machine starts working, the driving mechanism 20 drives the feeding channel 32 to transport the plastic particles coming in from the feed hopper 31. The heating equipment outside the feeding channel 32 melts the plastic particles into a plastic flow. As the feeding channel 32 pushes the plastic flow to the discharge sleeve 33, under the thrust of the plastic flow, the gravity ball 331 is pushed open and flows along the lower slope 339 to the ball storage part 338. The plastic flow flows out of the lower opening 333 along the positioning groove 337 and further flows into the clamping mechanism 40; when the driving mechanism 20 stops working, the feeding channel 32 no longer pushes the plastic flow forward. The gravity ball 331 automatically falls to the positioning groove 337 under the action of gravity, and fits into the concave edge 3371, blocking the positioning groove 337 and the lower opening 333 at the same time, quickly intercepting the plastic flow so that no excess plastic flow flows out of the lower opening 333, avoiding unnecessary waste.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A discharging mechanism of an injection molding machine, the main body of which includes an injection molding frame (10), a driving mechanism (20), a discharging mechanism (30) and a mold clamping mechanism (40), the discharging mechanism (30) including a feed hopper (31), a feeding channel (32), and a discharging nozzle (33), the right end of the feeding channel (32) is connected to the driving mechanism (20), and the left end is connected to the discharging nozzle (33), the feed hopper (31) is installed above the right side of the feeding channel (32), and is connected to the inside of the feeding channel (32); characterized in that, A gravity ball (331) is provided inside the discharge nozzle (33). When discharging, the gravity ball (331) is opened by the plastic flow, the nozzle is opened, and the plastic flow is transported out of the discharge nozzle (33); when the feeding stops, the gravity ball (331) automatically and quickly closes the nozzle, blocking the plastic flow from being transported out in time.

2. The discharge mechanism of the injection molding machine according to claim 1, characterized in that: The diameter of the gravity ball (331) is smaller than the aperture of the discharge nozzle (33).

3. The discharge mechanism of the injection molding machine according to claim 1, characterized in that: The discharge sleeve (33) is provided with an upper opening (332) and a lower opening (333), and the upper opening (332) and the lower opening (333) are connected to form an inner cavity (334). The discharge sleeve (33) is provided with a docking portion (335) and a discharge portion (336). The docking portion (335) is provided at the upper opening (332) of the discharge sleeve (33) and is connected and fixed to the end of the feeding channel (32) and is internally communicated. The discharge portion (336) is provided at the lower opening (333). A positioning groove (337) for fixing the gravity ball (331) is provided in the inner cavity (334). A ball storage portion (338) is also provided in the inner cavity (334) at one end of the discharge sleeve (333) away from the docking portion (335).

4. The discharge mechanism of the injection molding machine according to claim 3, characterized in that: The length of the ball storage portion (338) is greater than the diameter of the gravity ball (331).

5. The discharge mechanism of the injection molding machine according to claim 3, characterized in that: In the inner cavity (334) of the discharge sleeve (33), a downward slope (339) from left to right is provided from the ball storage portion (338) to the positioning groove (337).

6. The discharge mechanism of the injection molding machine according to claim 5, characterized in that: The angle of the lower slope (339) ranges from 0 to 30 degrees.

7. The discharge mechanism of the injection molding machine according to claim 3, characterized in that: The positioning groove (337) is provided with a concave edge portion (3371) that fits with the gravity ball (331), and the diameter of the positioning groove (337) is smaller than the diameter of the gravity ball (331).

8. The discharge mechanism of the injection molding machine according to claim 3, characterized in that: The discharge portion (336) of the discharge sleeve (33) is in the shape of a cone that is wide at the top and narrow at the bottom, and the cross section of the discharge portion (336) is in the shape of an inverted trapezoid.

9. The discharge mechanism of the injection molding machine according to claim 1, characterized in that: The ends of the discharge nozzle (33) and the feed channel (32) are provided with mutually matching threads.

Images