Plastic injection molding head

Abstract

The utility model relates to a plastic injection molding head which comprises a feeding conveying pipe, a material distributing cylinder and an adjusting sleeve, one end of the material distributing cylinder is connected with the feeding conveying pipe, and the other end of the material distributing cylinder is sealed; the adjusting sleeve is rotatably arranged outside the material distributing barrel in a sleeving manner and is in sealing fit with the material distributing barrel, and the adjusting sleeve is connected with a rotation driving mechanism; a vertical first injection molding pipe is arranged at the bottom of the adjusting sleeve, a vertical second injection molding pipe is arranged at the top of the adjusting sleeve, a feeding port is formed in the bottom of the material distributing barrel and communicates with the first injection molding pipe, and a cleaning mechanism is arranged above the second injection molding pipe. According to the injection molding device, the adjusting sleeve can be used for driving the first injection molding pipe and the second injection molding pipe to sequentially move to the injection molding position and the cleaning position, when one injection molding pipe is subjected to injection molding, the other injection molding pipe can be cleaned, the two working procedures are carried out at the same time, and the production efficiency is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection molding technical field especially a plastic injection head. BACKGROUND

[0002] The surrounding board box is a commonly used packaging box, usually made of plastic material. The plastic surrounding board is usually produced by injection molding process. The injection molding equipment used usually includes a mold, a barrel for melting plastic raw materials, an injection head for injecting plastic into the mold, and a conveying mechanism for conveying plastic in the barrel to the injection head. After completing one injection, a certain amount of molten plastic inevitably remains inside the injection head. The injection head gradually cools down after leaving the mold, causing the remaining plastic to solidify and adhere to the inside of the injection head. This affects the flow of molten plastic in the injection head during the next injection, and the solidified plastic may enter the mold along with the molten plastic, affecting the quality of the surrounding board.

[0003] To solve the above problems, some injection molding devices are equipped with cleaning mechanisms. After each injection, the cleaning mechanism is used to remove the remaining plastic in the injection head. For example, the injection head cleaning device disclosed in the utility model patent with application number CN202120900198.4 and the injection molding machine for conveniently cleaning the injection head disclosed in the utility model patent with application number CN202320127159.4. Although these injection molding devices can clean the remaining plastic material in the injection head, the injection head cannot work during cleaning, which affects production efficiency during batch production. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem of providing a plastic injection head that can clean the injection head without affecting production efficiency and is suitable for batch production of surrounding boards.

[0005] To solve the above problems, the utility model adopts the following technical solution: a plastic injection head, including a feed conveying pipe, a distribution barrel, and an adjusting sleeve. One end of the distribution barrel is connected to the feed conveying pipe, and the other end is sealed. The adjusting sleeve is rotatably sleeved outside the distribution barrel and sealingly cooperates with the distribution barrel. The adjusting sleeve is connected to a rotary drive mechanism. The bottom of the adjusting sleeve is provided with a vertical first injection pipe, and the top is provided with a vertical second injection pipe. The bottom of the distribution barrel is provided with a feed inlet, which is in communication with the first injection pipe. The second injection pipe is provided with a cleaning mechanism above.

[0006] Further, the cleaning mechanism includes a lifting mechanism. The lower end of the lifting mechanism is provided with a mounting seat. The lower surface of the mounting seat is provided with a cleaning motor and a gas supply mechanism. The cleaning motor is connected to a vertical cleaning shaft. The outer wall of the cleaning shaft is provided with a vertical scraper.

[0007] Further, the cleaning shaft is a hollow shaft, and a rotary joint is arranged at the upper end of the cleaning shaft inner hole, and the rotary joint is connected with the air supply mechanism through a hose.

[0008] Further, the lower surface of the mounting seat is provided with a mounting rack, the cleaning shaft is mounted on the mounting rack, and the cleaning motor is connected with the cleaning shaft through a transmission assembly.

[0009] Further, the outer wall of the cleaning shaft above the scraping blade is fixedly provided with a positioning disc, the lower surface of the positioning disc is provided with an inner sleeve and an outer sleeve, the inner diameter of the inner sleeve is matched with the outer diameter of the first injection pipe and the second injection pipe, a waste collecting cavity is arranged between the inner sleeve and the outer sleeve, the lower end of the waste collecting cavity is provided with a bottom plate, the top of the inner sleeve is provided with a waste inlet, and a plurality of exhaust holes are arranged on the positioning disc at the top of the waste collecting cavity.

[0010] Further, the bottom plate is detachably mounted.

[0011] Further, the inner wall of the distribution barrel is provided with a heating mechanism, and the outer wall of the adjusting sleeve is provided with a heat preservation layer.

[0012] The utility model discloses the beneficial effect is: in the utility model, can utilize rotary drive mechanism and drive adjusting sleeve rotation, and then drive first injection pipe and second injection pipe move to injection position and cleaning position in turn, first injection pipe is at injection position, and second injection pipe is at cleaning position, similarly, first injection pipe is at cleaning position, and second injection pipe is at injection position, one injection pipe injection, can clean the other injection pipe, two kinds of processes carry out simultaneously, guarantee production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the front view schematic diagram of the utility model;

[0014] Figure 2 It is Figure 1 the sectional view schematic diagram of A-A in it;

[0015] Figure 3 It is the schematic diagram when cleaning of the utility model;

[0016] Figure 4 It is Figure 3 the enlarged schematic diagram of B part in it;

[0017] Fig. 21 - feed conveying pipe; 22 - distribution cylinder; 23 - adjusting sleeve; 24 - rotating drive mechanism; 25 - first injection pipe; 26 - second injection pipe; 27 - feed inlet; 28 - lifting mechanism; 29 - mounting seat; 210 - cleaning motor; 211 - air supply mechanism; 212 - cleaning shaft; 213 - scraper; 214 - rotary joint; 215 - hose; 216 - mounting bracket; 217 - positioning disc; 218 - inner sleeve; 219 - outer sleeve; 220 - bottom plate; 221 - waste collection cavity; 222 - waste inlet; 223 - heating mechanism. DETAILED DESCRIPTION

[0018] The utility model is further explained below in connection with the drawings and examples.

[0019] The plastic injection head of the utility model, as shown in the drawings, comprises a feed conveying pipe 21, a distribution cylinder 22 and an adjusting sleeve 23. Figures 1 to 4 The one end of the distribution cylinder 22 is connected with the feed conveying pipe 21, and the other end is sealed; the adjusting sleeve 23 is rotatably sleeved outside the distribution cylinder 22 and sealingly cooperates with the distribution cylinder 22, and the adjusting sleeve 23 is connected with a rotating drive mechanism 24; the bottom of the adjusting sleeve 23 is provided with a vertical first injection pipe 25, and the top is provided with a vertical second injection pipe 26; the bottom of the distribution cylinder 22 is provided with a feed inlet 27, and the feed inlet 27 is communicated with the first injection pipe 25; the upper side of the second injection pipe 26 is provided with a cleaning mechanism.

[0020] The feed conveying pipe 21 is connected with the conveying mechanism of the injection molding equipment; the cylinder of the injection molding equipment melts the plastic raw material, which is conveyed into the distribution cylinder 22 by the conveying mechanism through the feed conveying pipe 21. The distribution cylinder 22 is a circular cylinder or a disc, which can be fixedly installed on the rack, and the center line of the distribution cylinder 22 is in a horizontal state. The adjusting sleeve 23 is a circular sleeve, and the adjusting sleeve 23 is gap cooperated with the distribution cylinder 22, so that the rotating drive mechanism 24 can drive the adjusting sleeve 23 to rotate. The rotating drive mechanism 24 can adopt a servo motor, which is connected with the adjusting sleeve 23 through a gear or a belt connector. The distribution cylinder 22 is sealingly cooperated with the distribution cylinder 22, so as to prevent the molten plastic material from entering the gap between the two.

[0021] The first injection pipe 25 and the second injection pipe 26 are used for injecting plastic into a mold, and the first injection pipe 25 and the second injection pipe 26 are coaxial and located on the two sides of the adjusting sleeve 23, i.e. when the first injection pipe 25 is located at the bottom of the adjusting sleeve 23, the second injection pipe 26 is located at the top of the adjusting sleeve 23. When the first injection pipe 25 is communicated with the feed inlet 27, the second injection pipe 26 is not communicated with the inner cavity of the distribution cylinder 22; when the second injection pipe 26 is rotated with the adjusting sleeve 23 to the bottom of the adjusting sleeve 23, the second injection pipe 26 is communicated with the feed inlet 27, and the first injection pipe 25 is not communicated with the inner cavity of the distribution cylinder 22.

[0022] The cleaning mechanism can clean the residual plastic on the inner wall of the first injection tube 25 and the second injection tube 26. When the first injection tube 25 moves to the top of the distribution cylinder 22, the cleaning mechanism cleans the first injection tube 25. When the second injection tube 26 moves to the top of the distribution cylinder 22, the cleaning mechanism cleans the second injection tube 26.

[0023] The working process of the utility model is as follows: when the first injection tube 25 is at the bottom of the adjusting sleeve 23, the molten plastic in the distribution cylinder 22 enters the first injection tube 25 through the feed port 27, and the first injection tube 25 is connected with the mold, so that the molten plastic is injected into the mold. After the plastic injection is completed, the first injection tube 25 is separated from the mold, the adjusting sleeve 23 is rotated by 180 degrees by using the rotary driving mechanism 24, the first injection tube 25 moves to the top of the adjusting sleeve 23 with the adjusting sleeve 23, and the second injection tube 26 moves to the bottom of the adjusting sleeve 23 with the adjusting sleeve 23. At this time, the first injection tube 25 is located below the cleaning mechanism, the cleaning mechanism can clean the residual and cooled solidified plastic in the first injection tube 25, and the second injection tube 26 is communicated with the feed port 27, so that the molten plastic can be injected into the next mold by using the second injection tube 26.

[0024] It can be seen that the utility model discloses the first injection tube 25 and the second injection tube 26 with interchangeable positions, the first injection tube 25 and the second injection tube 26 can be alternately injected and cleaned, the production efficiency is guaranteed, and the utility model is especially suitable for mass production.

[0025] The cleaning mechanism can adopt the prior art, for example, a high-pressure air gun is used to spray air to the first injection tube 25 or the second injection tube 26, and the residual plastic adhered to the inner wall of the first injection tube 25 or the second injection tube 26 is blown away by the high-pressure airflow; however, this way is difficult to clean the residual plastic sufficiently. As a preferred embodiment of the utility model, the cleaning mechanism comprises a lifting mechanism 28, which can be a conventional device such as an air cylinder or a hydraulic cylinder. The lower end of the lifting mechanism 28 is provided with a mounting seat 29, the lower surface of the mounting seat 29 is provided with a cleaning motor 210 and a gas supply mechanism 211, the cleaning motor 210 is connected with a vertical cleaning shaft 212, the outer wall of the cleaning shaft 212 is provided with vertical scraping blades 213, the scraping blades 213 can be two or three, which are uniformly distributed on the outer wall of the cleaning shaft 212, the length of the scraping blades 213 is greater than or equal to the depth of the first injection tube 25 and the second injection tube 26, so as to ensure that the scraping blades 213 can clean the entire inner wall of the first injection tube 25 and the second injection tube 26. The cleaning shaft 212 is a hollow shaft, and the upper end of the inner hole of the cleaning shaft 212 is provided with a rotary joint 214, the rotary joint 214 is in rotary connection with the cleaning shaft 212, that is, when the cleaning shaft 212 rotates, the rotary joint 214 can remain fixed. The rotary joint 214 is connected with the gas supply mechanism 211 through a hose 215. The gas supply mechanism 211 can adopt an air pump or the like, which is used to supply air to the cleaning shaft 212.

[0026] The cleaning process of the utility model is as follows: the lifting mechanism 28 drives the mounting seat 29 to move downward, so that the cleaning shaft 212 extends into the first injection tube 25 or the second injection tube 26; after the cleaning shaft 212 extends into the first injection tube 25 or the second injection tube 26, the side edge of the scraping blade 213 can contact the inner wall of the first injection tube 25 or the second injection tube 26; then the cleaning motor 210 drives the cleaning shaft 212 to rotate, the cleaning shaft 212 drives the scraping blade 213 to rotate, and the scraping blade 213 can scrape off the residual plastic on the inner wall of the first injection tube 25 or the second injection tube 26. At the same time, the gas supply mechanism 211 supplies air to the cleaning shaft 212, the lower end of the cleaning shaft 212 extends into the bottom of the first injection tube 25 or the second injection tube 26, and the solidified plastic scraped off is blown out under the action of the airflow.

[0027] The cleaning mechanism of the utility model can fully remove the residual plastic on the inner wall of the first injection tube 25 and the second injection tube 26.

[0028] In order to collect the plastic, prevent the plastic residue from moving disorderly, the lower surface of the mounting seat 29 is provided with a mounting frame 216, and the cleaning shaft 212 is mounted on the mounting frame 216, so that the stability of the cleaning shaft 212 during movement can be improved. The cleaning motor 210 is connected with the cleaning shaft 212 through a transmission assembly, and the transmission assembly can be a common transmission part such as a gear or a belt. The scraping piece 213 is arranged on the lower outer wall of the cleaning shaft 212, the outer wall of the cleaning shaft 212 above the scraping piece 213 is fixedly provided with a positioning disc 217, the positioning disc 217 is a disc, the lower surface of the positioning disc 217 is fixedly provided with an inner sleeve 218 and an outer sleeve 219, the inner sleeve 218 is located in the inner wall of the outer sleeve 219, and the cleaning shaft 212, the inner sleeve 218 and the outer sleeve 219 are coaxial. The inner diameter of the inner sleeve 218 is matched with the outer diameter of the first injection pipe 25 and the second injection pipe 26, so that the first injection pipe 25 and the second injection pipe 26 can be inserted into the inner sleeve 218. A waste collecting cavity 221 is arranged between the inner sleeve 218 and the outer sleeve 219, the lower end of the waste collecting cavity 221 is provided with a bottom plate 220, the top of the inner sleeve 218 is provided with a waste inlet 222, and a plurality of exhaust holes are arranged on the positioning disc 217 at the top of the waste collecting cavity 221.

[0029] When the first injection pipe 25 or the second injection pipe 26 is cleaned, the upper end of the first injection pipe 25 or the second injection pipe 26 is inserted into the inner sleeve 218 and is in gap cooperation with the inner sleeve 218, the plastic residue blown out by the gas enters the waste collecting cavity 221 through the waste inlet 222, the air in the waste collecting cavity 221 is discharged through the exhaust holes, and the plastic residue stays in the waste collecting cavity 221, so that the collection of the plastic residue is realized.

[0030] In order to facilitate cleaning of the plastic in the waste collecting cavity 221, the bottom plate 220 can be detachably mounted, for example, is in threaded connection with the inner sleeve 218 or the outer sleeve 219.

[0031] In order to keep the plastic in the distribution cylinder 22 at a proper temperature and prevent the plastic in the distribution cylinder 22 from being cooled to affect the injection performance, a heating mechanism 223 is arranged in the distribution cylinder 22, the heating mechanism 223 can be an electric heating wire, and a heat preservation layer is arranged outside the adjusting sleeve 23, and the heat preservation layer can be made of a conventional heat preservation material.

[0032] The preferred embodiments of the utility model are described above only, and are not used for limiting the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A plastic injection-molding head, characterized in that: The utility model provides a kind of injection molding machine, including feed conveying pipe (21), distribution barrel (22) and adjusting sleeve (23), one end of distribution barrel (22) is connected with feed conveying pipe (21), the other end is sealed;The adjusting sleeve (23) is rotatably sleeved in distribution barrel (22) and is sealed with distribution barrel (22), and the adjusting sleeve (23) is connected with rotating drive mechanism (24);The bottom of the adjusting sleeve (23) is provided with vertical first injection pipe (25), and the top is provided with vertical second injection pipe (26), the bottom of the distribution barrel (22) is provided with feed inlet (27), the feed inlet (27) is communicated with first injection pipe (25), and the upper of second injection pipe (26) is provided with cleaning mechanism.

2. The plastic injection molded head of claim 1, wherein: The cleaning mechanism includes a lifting mechanism (28), and a lower end of the lifting mechanism (28) is provided with a mounting seat (29). The mounting seat (29) is provided with a cleaning motor (210) and a gas supply mechanism (211). The cleaning motor (210) is connected with a vertical cleaning shaft (212). An outer wall of the cleaning shaft (212) is provided with a vertical scraper (213).

3. The plastic injection molded head of claim 2, wherein: The cleaning shaft (212) is a hollow shaft, and an upper end of a hole of the cleaning shaft (212) is provided with a rotary joint (214). The rotary joint (214) is connected with the gas supply mechanism (211) through a hose (215).

4. The plastic injection molded head of claim 3, wherein: A lower surface of the mounting seat (29) is provided with a mounting bracket (216). The cleaning shaft (212) is mounted on the mounting bracket (216). The cleaning motor (210) is connected with the cleaning shaft (212) through a transmission assembly.

5. The plastic injection molded head of claim 2, wherein: An outer wall of the cleaning shaft (212) above the scraper (213) is fixedly provided with a positioning disc (217). A lower surface of the positioning disc (217) is provided with an inner sleeve (218) and an outer sleeve (219). An inner diameter of the inner sleeve (218) is matched with an outer diameter of the first injection pipe (25) and the second injection pipe (26). A waste collecting cavity (221) is arranged between the inner sleeve (218) and the outer sleeve (219). A lower end of the waste collecting cavity (221) is provided with a bottom plate (220). A top of the inner sleeve (218) is provided with a waste inlet (222). A plurality of air vents are arranged on the positioning disc (217) at the top of the waste collecting cavity (221).

6. The plastic injection molded head of claim 5, wherein: The bottom plate (220) is detachably mounted.

7. The plastic injection molded head of claim 1, wherein: A heating mechanism (223) is arranged in the distribution barrel (22). The adjusting sleeve (23) is provided with a heat preservation layer.

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