CN-122008507-A - Glue melting mechanism of injection molding machine, injection molding machine and glue melting method

Abstract

The invention discloses an injection molding machine glue melting mechanism, an injection molding machine and a glue melting method, wherein the injection molding machine glue melting mechanism comprises a shooting table front plate, a glue melting cylinder and a hopper, wherein the glue melting cylinder and the hopper are arranged on the shooting table front plate; the air extractor is communicated with the screw groove of the screw feeding section, so that the screw groove of the screw feeding section is relatively communicated with the granular sizing material input by the hopper to form suction force. The melt adhesive mechanism of the injection molding machine, the injection molding machine and the melt adhesive method provided by the invention have the advantages of compact structure, uniform feeding and good plasticizing effect.

Inventors

• XIE XIONGFEI
• XIE PEI
• JIANG WEIYUAN
• ZHAO RUFA

Assignees

• 东华机械有限公司

Dates

Publication Date

20260512

Application Date

20260303

Claims (13)

1. 1. The melt adhesive mechanism of the injection molding machine comprises a front plate (10) of an injection table, a melt adhesive cylinder (5) arranged on the front plate, a hopper (8), a plasticizing screw (4) arranged in the melt adhesive cylinder (5) and the front plate (10) of the injection table, wherein a feeding screw groove is formed between the melt adhesive cylinder and the front plate (10), the hopper (8) is communicated with the screw groove at a screw feeding section (6), and the front plate (10) of the injection table is arranged on a platform (22) and is characterized by further comprising an air extracting device (24) communicated with the screw groove of the screw feeding section (6), and the air extracting device (24) enables the screw groove of the screw feeding section (6) to be relatively communicated with particle sizing materials input by the hopper (8) to form suction.
2. 2. The melt adhesive mechanism of the injection molding machine according to claim 1, wherein an axial air passage (16) and a radial air passage (7) which are communicated are arranged in the screw conveying section (6) of the plasticizing screw (4), and the air extracting device (24) is communicated with a screw groove of the screw conveying section (6) through the axial air passage (16) and the radial air passage (7).
3. 3. The melt adhesive mechanism of the injection molding machine according to claim 1, wherein an external connection air passage (30) is arranged in a positioning injection table front plate (10) which forms an external positioning wall corresponding to a screw groove of the screw rod material conveying section (6), and the air extracting device (24) is communicated with the screw groove of the screw rod material conveying section (6) through the external connection air passage (30).
4. 4. A melt adhesive mechanism for an injection molding machine according to claim 3, wherein the externally connected air passage (30) comprises a plurality of radial segments (29) radially opposed to the grooves of the screw feed section (6) and horizontal segments (27) horizontally disposed, respectively.
5. 5. The melt adhesive mechanism of the injection molding machine according to claim 2, wherein the handle of the plasticizing screw (4) is provided with an air groove (14) surrounding the screw, the bottom of the air groove (14) is provided with an air outlet (15) communicated with the axial air passage (16), and the air outlet (15) is connected with the air extraction device (24) through a pipeline.
6. 6. The melt adhesive mechanism of the injection molding machine according to claim 5, wherein an air sleeve (11) is sleeved outside a handle portion of the plasticizing screw (4), an air suction hole (20) is formed in the air sleeve (11), the air suction hole (20) is communicated with the air groove (14), and the air sleeve (11) is in dynamic sealing connection with the plasticizing screw (4).
7. 7. The melt adhesive mechanism of the injection molding machine according to claim 2, wherein a plurality of radial air passages (7) are axially distributed at the bottom of the screw groove of the screw conveying section (6).
8. 8. The melt adhesive mechanism of the injection molding machine according to claim 2, further comprising a positioning guide rod (12) fixedly arranged and parallel to the axis of the plasticizing screw (4); The positioning guide rod (12) penetrates through the air sleeve (11) to limit the air sleeve (11) to rotate along with the plasticizing screw (4), and the air sleeve (11) can move synchronously along with the axial movement of the plasticizing screw (4) along with the positioning guide rod (12).
9. 9. The melt adhesive mechanism of the injection molding machine according to claim 6, wherein sealing rings (13) are arranged on the inner sides of two ends of the air sleeve (11), and the sealing rings (13) are in sealing fit with the outer circular surface of the plasticizing screw (4).
10. 10. The melt adhesive mechanism of an injection molding machine according to claim 2, further comprising a plasticizing motor (18) for driving the plasticizing screw (4) to rotate and the heating ring (3) for heating the melt adhesive cylinder (5).
11. 11. The melt adhesive mechanism of an injection molding machine according to claim 2, characterized in that the rear end of the plasticizing screw (4) is provided with a plug (19) for closing the end of the axial air channel (16).
12. 12. An injection molding machine comprising the melt adhesive mechanism of any one of claims 1 to 11.
13. 13. A method of melting adhesive, characterized in that the method comprises the following steps of: step 1, starting a heating ring (3) to heat a melt adhesive cylinder (5); step 2, starting an air extractor (24), and extracting air from the interior of a spiral groove of the screw conveying section (6) through a radial air passage (7), an axial air passage (16) and a pipeline to form negative pressure in the area; step 3, starting a plasticizing motor (18) to drive a plasticizing screw (4) to rotate; Step 4, the granular sizing material (9) is forcedly sucked and tightly filled in a screw groove of the screw conveying section (6) under the combined action of self gravity and the atmospheric pressure outside the hopper; Step 5, the granular sizing material (9) is gradually melted under the radiation heating of the heating ring (3) and the shearing heating of the plasticizing screw (4) to form molten sizing material, and the molten sizing material is conveyed to the front end of the head nozzle to finish the plasticizing process.

Description

Glue melting mechanism of injection molding machine, injection molding machine and glue melting method Technical Field The invention relates to the technical field of plastic molding machinery, in particular to an injection molding machine glue melting mechanism, an injection molding machine and a glue melting method. Background In plastic molding equipment such as injection molding machines and extruders, a plasticizing screw is a core component for achieving melt plasticization of plastic particles. In the traditional plasticizing process, the granular sizing material mainly depends on self gravity to fall into a screw groove of a melt adhesive cylinder from a hopper, and is conveyed forward and melted gradually under the rotation action of a screw. However, due to the light weight and large flowability difference of the sizing material particles, the problems of uneven blanking, insufficient feeding and the like easily occur, the plasticizing efficiency and the plasticizing quality are affected, and even the shortage of the materials or incomplete plasticizing is caused. Therefore, there is a need to solve the above-mentioned technical problems. Disclosure of Invention Aiming at the technical problems, the invention provides an injection molding machine glue melting mechanism, an injection molding machine and a glue melting method, which have compact structure, uniform feeding and good plasticizing effect. In order to achieve the above purpose, the technical scheme of the invention is as follows: The plastic melting mechanism of injection molding machine includes front plate of injection stage, plastic cylinder, hopper, plasticizing screw set inside the plastic cylinder and the front plate to form screw slot for conveying material, hopper connected to the screw slot in the material conveying section of the screw, air exhauster connected to the screw slot in the material conveying section of the screw to form suction force for the screw slot in the material conveying section of the screw to be communicated with the granular material. According to a further optimization scheme, an axial air passage and a radial air passage which are communicated are arranged in a screw conveying section of the plasticizing screw, an air extracting device is communicated with a screw groove of the screw conveying section through the axial air passage and the radial air passage, and the air extracting device extracts air from the screw groove of the screw conveying section, so that particle sizing materials are forcedly filled into the screw groove under the action of external atmospheric pressure. According to the melt adhesive mechanism of the injection molding machine, as the radial air passage is arranged at the bottom of the screw groove of the screw rod conveying section of the plasticizing screw rod, the air extractor vacuumizes the screw groove of the screw rod conveying section through the axial air passage and the radial air passage, so that the particle adhesive material is subjected to the action of self gravity and atmospheric pressure in the process of entering the charging barrel and the plasticizing screw rod, the adhesive material entering the screw groove is more compact, and the consistency and plasticizing efficiency of the adhesive material particles entering the charging barrel are ensured. According to a further optimized scheme, an external air passage is arranged in a positioning shooting table front plate which corresponds to the screw groove of the screw rod material conveying section to form an external positioning wall, and the air extractor is communicated with the screw groove of the screw rod material conveying section through the external air passage. Further optimizing scheme, the outer air flue includes a plurality of radial sections and horizontal section that are mutually horizontal with the helicla flute radial of screw rod material conveying section respectively. According to a further optimized scheme, an air groove surrounding the screw is formed in the handle of the plasticizing screw, an air outlet communicated with the axial air passage is formed in the bottom of the air groove, and the air outlet is connected with the air exhaust device through a pipeline. By arranging the annular air groove on the handle part of the plasticizing screw, a transfer space for air circulation is provided between the rotating screw and the fixed vacuumizing pipeline. The structure ensures that the screw rod can still realize stable gas communication with an external pipeline through the annular air groove under the high-speed rotation state, thereby avoiding the problem of pipeline winding or connection failure caused by screw rod rotation and ensuring the continuity and reliability of vacuumizing. According to a further optimized scheme, an air sleeve is sleeved outside the handle of the plasticizing screw, a radial air channel is arranged on the air sleeve, the radial air channel is communicated wit