Plastic injection molding feeder

Abstract

The utility model relates to the technical field of injection molding feeders, in particular to a plastic injection molding feeder which comprises a feeding cylinder, an air outlet, a protective net, a stirring mechanism and a hot air pipe, a material storage barrel is connected to a material inlet of the material feeding barrel; the multiple groups of air outlets are uniformly distributed around the inner wall of the storage barrel; the stirring mechanism is composed of a bracket mounted at the top end of the storage barrel, a rotating shaft rotationally connected with the bracket under the driving of a motor and a plurality of groups of stirring blades uniformly mounted on the peripheral surface of the rotating shaft. External air can be introduced into the preheated feeding barrel to be heated through the fan, the hot air pipe and the connecting pipe and then conveyed into the inner cavity of the side wall of the storage barrel, hot air is discharged towards plastic particles through the multiple sets of air outlets, and meanwhile the plastic particles in the storage barrel are stirred through the stirring mechanism; according to the plastic particle drying device, wet plastic particles can be rapidly dried, blockage during discharging is avoided, meanwhile, the plastic particles can be preheated, the follow-up melting efficiency is improved, and the feeding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding feeder technology, specifically a plastic injection molding feeder. Background Technology

[0002] Injection molding machines typically use a feeder consisting of a storage tank and a hot melt feed cylinder for feeding. During operation, the material enters the hot melt feed cylinder from the storage tank, is heated and melted while being conveyed forward, and is finally injected into the injection mold. Once the mold is full, the material feeding stops.

[0003] Chinese Patent CN222372168U discloses a high molecular weight polymer (HMWPP) injection molding feeder, comprising a feed cylinder and an opening / closing component. The feed cylinder includes a hot melt cylinder body with symmetrically arranged through cavities on its side walls. Both ends of the through cavities have through holes penetrating the side walls of the hot melt cylinder body. A material storage component is provided on the outer wall of the feed cylinder. In this invention, during injection molding, the material inside the feed cylinder is injected into the injection mold via the feeding component. After feeding is complete, the opening / closing component connects the middle of the hot melt cylinder body with the through cavities. Driven by the feeding component, the material inside the feed cylinder circulates, preventing uneven temperature distribution of the liquid material when not being injected.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: when plastic granules become damp and clump together, blockages can easily occur in the storage components, preventing the plastic granules from smoothly entering the feed cylinder and reducing feeding efficiency. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a plastic injection molding feeder.

[0006] The technical solution of this utility model is as follows: A plastic injection molding feeder includes a feed cylinder with its inlet connected to a storage tank, and a second solenoid valve installed at the connection between the storage tank and the feed cylinder; multiple sets of air outlets evenly distributed around the inner wall of the storage tank; a protective net evenly laid in the inner cavity of the side wall of the storage tank, corresponding to the multiple sets of air outlets; a stirring mechanism consisting of a bracket installed at the top of the storage tank, a rotating shaft driven by a motor to rotate the bracket, and multiple sets of stirring blades evenly installed on the outer circumference of the rotating shaft; and a hot air pipe, one end of which is connected to the feed cylinder, and the other end of which is connected to the inner cavity of the side wall of the storage tank. The bottom end of the feed cylinder is connected to an air inlet pipe, and a first solenoid valve is installed at the connection between the air inlet pipe and the feed cylinder, as well as at the connection between the hot air pipe and the feed cylinder. A fan is also installed on the hot air pipe.

[0007] Preferably, the lengths of the multiple sets of stirring blades are not equal; a spiral feeding blade is installed at the bottom of the rotating shaft.

[0008] Preferably, the storage hopper includes a connecting part and a guiding part, the bottom of which is connected to a conveying pipe. Multiple sets of air outlets are evenly distributed around the inner walls of the guiding part and the connecting part. The top of the guiding part and the bottom of the connecting part are detachably connected. Protective nets are laid in the inner cavities of both the connecting part and the guiding part.

[0009] Preferably, the connecting part consists of a first outer shell, a first inner shell, and a sealing cover installed between the top of the first outer shell and the top of the first inner shell. A connecting seat is installed at the bottom of the first outer shell, and multiple sets of air outlets are evenly opened on the first inner shell. A set of protective nets is laid on the outer wall of the first inner shell. A first mounting hole is opened at the top of both the first outer shell and the first inner shell, and the sealing cover is connected to the corresponding first mounting hole by bolts.

[0010] Preferably, the material guiding part consists of a second outer shell and a second inner shell connected to the bottom end of the second outer shell. Another set of second inner shells is installed on the top end of the second outer shell. The two sets of connecting seats are connected by bolts. An annular socket is installed on the top end of the second inner shell. A slot is opened at the bottom end of the first inner shell. The annular socket is inserted into the slot. Another set of protective nets is laid on the outer wall of the second inner shell. The output end of the hot air pipe is connected to the cavity formed between the second outer shell and the second inner shell.

[0011] Preferably, sealing gaskets are provided at the connection points of the first outer shell, the first inner shell and the sealing cover, the connection points of the two sets of connecting seats, and the connection points of the annular socket and the slot.

[0012] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: This utility model can introduce external air into the preheated feed cylinder for heating through a fan, hot air pipe and connecting pipe, and then transport it to the inner cavity of the side wall of the storage tank. The hot air is discharged towards the plastic particles through multiple sets of air outlets. At the same time, the plastic particles inside the storage tank are stirred by the stirring mechanism, which can quickly dry the wet plastic particles and avoid blockage during feeding. It can also preheat the plastic particles, improve the subsequent melting efficiency and improve the feeding efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram showing the connection between the stirring mechanism and the storage tank of this utility model;

[0015] Figure 3 This is a schematic diagram of the storage tank structure of this utility model.

[0016] Reference numerals: 1. Feed cylinder; 101. Hot air pipe; 102. Fan; 103. First solenoid valve; 2. Storage tank; 3. First outer shell; 301. Second outer shell; 302. Connecting seat; 303. Second inner shell; 304. Ring socket; 305. First inner shell; 306. Slot; 307. Sealing cover; 308. Feed pipe; 309. Second solenoid valve; 4. Air outlet; 401. Protective net; 5. Support; 501. Rotating shaft; 502. Agitator blade; 503. Spiral feeder blade. Detailed Implementation

[0017] Example 1

[0018] like Figures 1 to 3 As shown, this utility model proposes a plastic injection molding feeder, including a feed cylinder 1, an air outlet 4, a protective net 401, a stirring mechanism, and a hot air pipe 101; the feed cylinder 1 is connected to a storage tank 2 at its inlet, and a second solenoid valve 309 is installed at the connection between the storage tank 2 and the feed cylinder 1; multiple sets of air outlets 4 are provided, and the multiple sets of air outlets 4 are evenly distributed around the inner wall of the storage tank 2; the protective net 401 is evenly laid in the inner cavity of the side wall of the storage tank 2, and the protective net 401 corresponds to the multiple sets of air outlets 4; the stirring mechanism is installed at the top of the storage tank 2. The support 5, the rotating shaft 501 that is driven by a motor to rotate the support 5, and the multiple sets of stirring blades 502 evenly installed on the outer circumference of the rotating shaft 501 are all composed of a support 5, a rotating shaft 501 that is driven by a motor to rotate the support 5, and multiple sets of stirring blades 502 evenly installed on the outer circumference of the rotating shaft 501; one end of the hot air pipe 101 is connected to the feed cylinder 1, and the other end of the hot air pipe 101 is connected to the inner cavity of the side wall of the storage tank 2; the bottom end of the feed cylinder 1 is connected to the air inlet pipe, the input end of the air inlet pipe is provided with a dustproof net, and the connection between the air inlet pipe and the feed cylinder 1 and the connection between the hot air pipe 101 and the feed cylinder 1 are both provided with a first solenoid valve 103; a fan 102 is also provided on the hot air pipe 101.

[0019] Furthermore, the multiple sets of stirring blades 502 have different lengths, which facilitates the thorough stirring of the plastic granules inside the storage tank 2; a spiral feeding blade 503 is installed at the bottom of the rotating shaft 501, and the spiral feeding blade 503 is located above the second solenoid valve 309. The spiral feeding blade 503 facilitates the stirring and conveying of materials between the storage tank 2 and the feed cylinder 1, avoiding blockage.

[0020] In this embodiment, plastic granules are placed inside the storage tank 2, and the feeding cylinder 1 is preheated to facilitate subsequent melting of the plastic granules. The controller opens the first solenoid valve 103 and starts the blower 102. The blower 102 introduces external air into the feeding cylinder 1 through the air inlet pipe, heats it, and then transports it along the hot air pipe 101 into the inner cavity of the storage tank 2. The hot air is then evenly transported into the storage tank 2 through multiple air outlets 4. The controller starts the motor to drive the bracket 5 to rotate, which in turn drives multiple sets of stirring blades 502 to rotate, thus discharging the stored plastic granules. The plastic granules inside the tank 2 are stirred and come into full contact with hot air, thereby drying the plastic granules. After drying, the controller closes the first solenoid valve 103 and opens the second solenoid valve 309. The stirring mechanism continues to stir, and the rotating shaft 501 drives the spiral feeder 503 to rotate, conveying the dried plastic granules into the feed cylinder 1. This not only dries the plastic granules and prevents blockage of the inlet of the storage tank 2 and the feed cylinder 1, but also preheats the plastic granules, improving the subsequent melting efficiency.

[0021] Example 2

[0022] like Figures 2 to 3 As shown, the present invention proposes a plastic injection molding feeder. Compared with Embodiment 1, the storage tank 2 includes a connecting part and a guiding part. The bottom end of the guiding part is connected to a conveying pipe 308. A second solenoid valve 309 is installed between the conveying pipe 308 and the feeding cylinder 1. Multiple sets of air outlets 4 are evenly distributed around the inner walls of the guiding part and the connecting part. The spiral feeding blade 503 is adapted to the conveying pipe 308. The top end of the guiding part and the bottom end of the connecting part are detachably connected. A protective net 401 is laid in the inner cavity of both the connecting part and the guiding part.

[0023] Furthermore, the connecting part consists of a first outer shell 3, a first inner shell 305, and a sealing cover 307 installed between the top ends of the first outer shell 3 and the first inner shell 305. A connecting seat 302 is installed at the bottom end of the first outer shell 3. Multiple sets of air outlets 4 are evenly opened on the first inner shell 305. A set of protective nets 401 is laid on the outer wall of the first inner shell 305. The sealing cover 307 is designed as a ring. The bracket 5 is installed on the top end of the sealing cover 307 by bolts. The top ends of the first outer shell 3 and the first inner shell 305 are both provided with first mounting holes. The sealing cover 307 is connected to the corresponding first mounting holes by bolts.

[0024] Furthermore, the material guiding part consists of a second outer shell 301 and a second inner shell 303 connected to the bottom end of the second outer shell 301. Another set of second inner shells 303 is installed on the top end of the second outer shell 301. Both sets of connecting seats 302 are provided with second mounting holes. The two sets of connecting seats 302 are connected by bolts. An annular socket 304 is installed on the top end of the second inner shell 303. A slot 306 is provided at the bottom end of the first inner shell 305. The annular socket 304 is inserted into the slot 306. Another set of protective nets 401 is laid on the outer wall of the second inner shell 303. The output end of the hot air pipe 101 is connected to the cavity formed between the second outer shell 301 and the second inner shell 303.

[0025] Furthermore, sealing gaskets are provided at the connection points of the first outer shell 3, the first inner shell 305 and the sealing cover 307, the connection points of the two sets of connecting seats 302, and the connection points of the annular socket 304 and the slot 306 to improve the sealing performance of the connection points and prevent hot air leakage and waste.

[0026] In this embodiment, by removing the bolts between the sealing cap 307 and the top of the first outer shell 3 and the first inner shell 305, the sealing cap 307 can be separated from them. The protective net 401 outside the first inner shell 305 can be cylindrical and slidably connected to the outer wall of the first inner shell 305. It can be separated by sliding it upward along the outer wall of the first inner shell 305. By removing the bolts between the two sets of connecting seats 302, the first outer shell 3 can be separated from the second outer shell 301. By lifting the first inner shell 305 upward, the first inner shell 305 can be separated from the second inner shell 303. The protective net 401 on the outer wall of the second inner shell 303 is fixed by bolts. By removing the bolts, the protective net 401 can be taken out. Then the storage tank 2 can be disassembled and cleaned and inspected regularly.

[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A plastic injection molding feeder, characterized by, The utility model relates to a kind of material feeding barrel and its feeding device. It comprises Feed cylinder (1), its inlet is connected with storage barrel (2), and the connecting place of storage barrel (2) and feed cylinder (1) is equipped with second electromagnetic valve (309); Multiple groups of air outlets (4) are evenly distributed around the inner wall of the storage barrel (2); A protective screen (401) is evenly laid in the inner cavity of the side wall of the storage barrel (2), and the protective screen (401) corresponds to the multiple groups of air outlets (4); A stirring mechanism is composed of a support (5) installed at the top end of the storage barrel (2), a rotating shaft (501) driven by a motor to rotate the support (5), and multiple groups of stirring blades (502) evenly installed on the outer periphery of the rotating shaft (501); 2. A plastic injection molding feeder according to claim 1, wherein, And a hot air pipe (101) is connected to the feed cylinder (1) at one end, and the other end of the hot air pipe (101) is connected to the inner cavity of the side wall of the storage barrel (2). The bottom end of the feed cylinder (1) is connected to an air inlet pipe, and the connecting part of the air inlet pipe and the feed cylinder (1) and the connecting part of the hot air pipe (101) and the feed cylinder (1) are both provided with a first electromagnetic valve (103). A fan (102) is also provided on the hot air pipe (101).

3. A plastic injection molding feeder as defined in claim 1, wherein, The lengths of the multiple groups of stirring blades (502) are different. The storage barrel (2) comprises A connecting part; 4. A plastic injection molding feeder according to claim 3, wherein And a material guiding part, which is connected with a material conveying pipe (308) at the bottom end, and the multiple groups of air outlets (4) are evenly distributed around the inner walls of the material guiding part and the connecting part. The top end of the material guiding part is detachably connected to the bottom end of the connecting part. The inner cavities of the connecting part and the material guiding part are both laid with a protective screen (401).

5. A plastic injection molding feeder according to claim 4, wherein The connecting part is composed of a first outer shell (3), a first inner shell (305), and a sealing cover (307) installed between the top ends of the first outer shell (3) and the first inner shell (305). The bottom end of the first outer shell (3) is installed with a connecting seat (302). The first inner shell (305) is evenly provided with multiple groups of air outlets (4). The outer wall of the first inner shell (305) is laid with a group of protective screens (401). The top ends of the first outer shell (3) and the first inner shell (305) are both provided with first mounting holes. The sealing cover (307) is connected to the corresponding first mounting holes through bolts.

6. A plastic injection molding feeder according to claim 5, wherein, The material guiding part is composed of a second outer shell (301) and a second inner shell (303) connected to the bottom end of the second outer shell (301). The top end of the second outer shell (301) is installed with another group of second inner shells (303). The two connecting seats (302) are connected through bolts. The top end of the second inner shell (303) is installed with a ring-shaped socket (304). The bottom end of the first inner shell (305) is provided with a slot (306). The ring-shaped socket (304) is insertedly connected to the slot (306). The outer wall of the second inner shell (303) is laid with another group of protective screens (401). The output end of the hot air pipe (101) is connected to the cavity formed between the second outer shell (301) and the second inner shell (303). The connecting parts of the first outer shell (3), the first inner shell (305), and the sealing cover (307), the connecting parts of the two connecting seats (302), and the connecting parts of the ring-shaped socket (304) and the slot (306) are all provided with sealing pads.

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