Hopper of injection molding machine

Abstract

The utility model provides a hopper of an injection molding machine, which comprises a hopper body provided with a channel penetrating from top to bottom and an outlet for discharging; the filter screen comprises a conical filter surface and a closed surface connected between the filter surface and the inner side of the hopper body; and the scraping plate is rotationally arranged on the filtering surface, extends to the sealing surface and is used for discharging the plastic borne by the sealing surface to the outlet. Under the cooperation of the hopper body and the filter screen, after plastic particles are put into the hopper body, the plastic particles are filtered by the filter surface of the filter screen, the plastic particles smaller than the aperture of the filter surface directly pass through the filter surface, and the plastic particles larger than the aperture of the filter surface are intercepted by the filter surface and stay at the upper half part of the hopper body; and large-particle plastic is guided to the closed surface of the filter screen through the conical filter surface to be received, so that the permeability of the filter surface is always ensured, and the normal working efficiency is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a hopper of an injection molding machine. Background Art

[0002] The injection mechanism of the injection molding machine includes a hopper and a barrel. The hopper is used to store plastic particles and add plastic particles into the barrel. The barrel is provided with a screw and a heating mechanism for heating the molten plastic particles and injecting the molten plastic melt into the mold. When feeding, the plastic particles need to be filtered to prevent larger plastic particles from affecting the melting efficiency.

[0003] For example, the Chinese patent "CN220864607U" discloses "a hopper feeding device for an injection molding machine". The device drives two reset plates to move upward through a vertical rod and compresses two reset springs. The two vertical rods drive the filter frame to move upward. When the two reset springs are reset, the elastic force of the two reset springs is used to reset and shake the filter frame, thereby filtering the material. However, the filter in the above hopper structure is a planar structure. After intercepting the plastic particles, the larger plastic particles are always on the filter, which will gradually affect the filter holes of the filter, thereby affecting the permeability of the filter and indirectly affecting the work efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an injection molding machine hopper, which solves the problem that the filter screen in the prior art is a planar structure, resulting in larger plastic particles always being on the filter screen, which will gradually affect the filter holes of the filter screen, thereby affecting the permeability of the filter screen.

[0005] According to the embodiment of the utility model, the utility model adopts the following technical solution:

[0006] An injection molding machine hopper, comprising:

[0007] The hopper body has a passage extending from top to bottom and is provided with an outlet for discharging materials;

[0008] A filter screen including a conical filter surface and a closing surface connected between the filter surface and the inner side of the hopper body; and

[0009] The scraper is rotatably arranged on the filtering surface and extends to the closing surface, so as to discharge the plastic carried by the closing surface to the outlet.

[0010] Preferably, a driver is provided at the bottom of the filter surface, a rotating block is rotatably provided at the top of the filter surface, the rotating block is connected to the output shaft of the driver, and the scraper is connected to the rotating block.

[0011] Preferably, the closing surface has a guide slope extending downward.

[0012] Preferably, a fixing plate is provided on the outside of the hopper body, a fixing rod is provided on the fixing plate, a baffle is slidably provided on the fixing rod, and the baffle is buckled at the outlet.

[0013] Preferably, the fixing rod sleeve is provided with a spring, and the spring abuts against the outer side of the baffle.

[0014] Preferably, the baffle is provided with a protrusion, which is clamped on the outlet and is coplanar with the inner side of the hopper body.

[0015] Preferably, a material guide port corresponding to the outlet is provided on the outer side of the hopper body.

[0016] Preferably, a connecting flange is provided at the bottom of the hopper body.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] With the cooperation of the hopper body and the filter screen, after the plastic particles are put into the hopper body, they are filtered by the filter surface of the filter screen. Plastic particles smaller than the diameter of the filter surface directly pass through the filter surface, while plastic particles larger than the diameter of the filter surface will be intercepted by the filter surface and stay in the upper half of the hopper body. The large-particle plastic is guided to the closed surface of the filter screen through the conical filter surface and received, thereby always ensuring the permeability of the filter surface and ensuring normal working efficiency. At the same time, the large-particle plastic on the closed surface can also be transported to the exit position under the action of the scraper, so that it can be discharged conveniently for further processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0020] Figure 2 It is a schematic cross-sectional structure diagram of an embodiment of the utility model.

[0021] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of area A in the middle.

[0022] In the above drawings: 1. hopper body; 2. filter screen; 201. filter surface; 202. closing surface; 203. guide slope; 3. scraper; 4. driver; 5. fixing plate; 6. fixing rod; 7. spring; 8. material guide port; 9. baffle; 10. raised part; 11. outlet; 12. rotating block; 13. connecting flange. DETAILED DESCRIPTION

[0023] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1 and Figure 2As shown, the embodiment of the utility model provides an injection molding machine hopper, comprising:

[0025] The hopper body 1 has a passage extending from top to bottom and is provided with an outlet 11 for discharging materials;

[0026] The filter screen 2 comprises a conical filter surface 201 and a closed surface 202 connected between the filter surface 201 and the inner side of the hopper body 1; and

[0027] The scraper 3 is rotatably disposed on the filtering surface 201 and extends to the closing surface 202 , so as to discharge the plastic carried by the closing surface 202 to the outlet 11 .

[0028] In the embodiment of the utility model, with the cooperation of the hopper body 1 and the filter screen 2, after the plastic particles are put into the hopper body 1, they are filtered by the filter surface 201 of the filter screen 2. Plastic particles smaller than the aperture of the filter surface 201 directly pass through the filter surface 201, while plastic particles larger than the aperture of the filter surface 201 are intercepted by the filter surface 201 and stay in the upper half of the hopper body 1. The large particles of plastic are guided to the closed surface 202 of the filter screen 2 through the conical filter surface 201, and are received, so that the permeability of the filter surface 201 is always guaranteed to ensure normal working efficiency. Moreover, the conical filter surface 201 also increases the contact area between the filter screen 2 and the plastic particles in the hopper body 1, providing more contact space. At the same time, the large particles of plastic on the closed surface 202 can also be transported to the outlet 11 under the action of the scraper 3, so that it is convenient to discharge it for further processing.

[0029] Based on the above scheme, a driver 4 is provided at the bottom of the filter surface 201, and a rotating block 12 is rotatably provided at the top of the filter surface 201. The rotating block 12 is connected to the output shaft of the driver 4, and the scraper 3 is connected to the rotating block 12; the plastic particles that have not passed through the filter surface 201 will automatically move to the closed surface 202 under the action of their gravity, and the driver 4 is started so that the output shaft of the driver 4 drives the rotating block 12 to rotate, so that the rotating block 12 drives the connected scraper 3 to make a circular motion on the filter net 2, thereby pushing the plastic particles accumulated on the closed surface 202 to the outlet 11, so that the plastic particles are discharged from the outlet 11, and the small particles of plastic mixed in the large particles of plastic can also be returned to the filter surface 201 by the push of the scraper 3, and pass through the filter surface 201, so as to ensure the filtration efficiency. The above-mentioned driver 4 adopts a motor.

[0030] Specifically, Figure 3 As shown, the closed surface 202 has a guide slope 203 extending downward, and the plastic particles accumulated on the closed surface 202 tend to move around on the closed surface 202 with the guide slope 203 and can be discharged through the outlet 11 by themselves.

[0031] Based on the above scheme, if Figure 3 As shown, a fixed plate 5 is provided on the outside of the hopper body 1, and a fixed rod 6 is provided on the fixed plate 5. A baffle 9 is slidably provided on the fixed rod 6, and the baffle 9 is buckled in the outlet 11. With the cooperation of the fixed plate 5 and the fixed rod 6, a space for installing the baffle 9 is provided, so that the baffle 9 can slide on the fixed rod 6, and the outlet 11 can be opened or closed by the baffle 9 to discharge the plastic particles in the hopper body 1 in a centralized manner.

[0032] Specifically, Figure 1 As shown, the fixing rod 6 is sleeved with a spring 7, and the spring 7 abuts against the outer side of the baffle 9; under the action of the spring 7, the baffle 9 is always subjected to the pressure of the spring 7 and abuts against the position of the outlet 11, thereby ensuring the stability of the baffle 9 blocking the outlet 11. When the outlet 11 is opened, the baffle 9 is pulled to move on the fixing rod 6 and compress the spring 7. When the outlet 11 is closed, the baffle 9 is directly released so that the baffle 9 automatically snaps into place at the outlet 11 when the spring 7 is reset, which is convenient to operate.

[0033] Specifically, Figure 1 As shown, the baffle 9 is provided with a protrusion 10, which is snapped into the outlet 11 and is coplanar with the inner side of the hopper body 1. When the baffle 9 is buckled into the outlet 11, the protrusion 10 of the baffle 9 is snapped into the inside of the outlet 11 and forms the same plane with the inner side of the hopper body 1, thereby preventing the rubber particles from entering the inside of the outlet 11 in advance.

[0034] Specifically, Figure 1 As shown, a material guide port 8 corresponding to the outlet 11 is provided on the outside of the hopper body 1 . When the plastic particles are discharged through the outlet 11 , they can be guided through the material guide port 8 .

[0035] Based on the above scheme, if Figure 1 As shown, a connecting flange 13 is provided at the bottom of the hopper body 1; the hopper body 1 can be quickly installed on the injection mechanism of the injection molding machine through the connecting flange 13, so as to be disassembled for maintenance later.

[0036] In summary, the present solution can intercept plastic particles of different sizes by setting the filter screen 2 to ensure the subsequent melting efficiency and quality of the plastic particles, and the filter screen 2 is composed of a closed surface 202 and a conical filter surface 201. The conical filter surface 201 not only increases the filtering area in the hopper body 1, but also allows the intercepted plastic particles to be automatically guided to the closed surface 202 for acceptance, and always ensures the normal permeability of the filter surface 201 to ensure normal filtering efficiency. When the feeding is completed, the scraper 3 can be driven by the driver 4 to rotate continuously when the outlet 11 is closed, and the small particles of plastic mixed in the large particles of plastic are returned to the filter surface 201 for filtration, thereby improving efficiency.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An injection molding machine hopper, characterized in that: include: The hopper body (1) has a passage extending from top to bottom and is provided with an outlet (11) for discharging materials; A filter screen (2) comprising a conical filter surface (201) and a closed surface (202) connected between the filter surface (201) and the inner side of the hopper body (1); and A scraper (3) is rotatably disposed on the filtering surface (201) and extends to the closing surface (202), and is used to discharge the plastic carried by the closing surface (202) to the outlet (11).

2. An injection molding machine hopper according to claim 1, characterized in that: A driver (4) is provided at the bottom of the filtering surface (201), a rotating block (12) is rotatably provided at the top of the filtering surface (201), the rotating block (12) is connected to the output shaft of the driver (4), and the scraper (3) is connected to the rotating block (12).

3. The injection molding machine hopper according to claim 1, characterized in that: The closing surface (202) has a guiding inclined surface (203) extending downward.

4. The injection molding machine hopper according to claim 1, characterized in that: A fixing plate (5) is provided on the outside of the hopper body (1), the fixing plate (5) is provided with a fixing rod (6), the fixing rod (6) is slidably provided with a baffle (9), and the baffle (9) is buckled on the outlet (11).

5. The injection molding machine hopper according to claim 4, characterized in that: The fixing rod (6) is sleeved with a spring (7), and the spring (7) abuts against the outer side of the baffle (9).

6. The injection molding machine hopper according to claim 4, characterized in that: The baffle (9) is provided with a protrusion (10), and the protrusion (10) is clamped on the outlet (11) and is coplanar with the inner side of the hopper body (1).

7. The injection molding machine hopper according to claim 1, characterized in that: The outside of the hopper body (1) is provided with a material guide port (8) corresponding to the outlet (11).

8. The injection molding machine hopper according to claim 1, characterized in that: A connecting flange (13) is provided at the bottom of the hopper body (1).

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