Injection molding device for electric pipe fitting production

Abstract

The utility model discloses an injection molding device for electric pipe fitting production, which belongs to the field of electric pipe fitting injection molding, and comprises an injection molding machine body, the inner side of the injection molding machine body is fixedly connected with a charging barrel, the charging barrel is used for storing plastic melt of electric pipe fittings, and the top of the charging barrel is provided with a feeding pipeline. The top of the feeding pipeline is provided with a sealing mechanism, the bottom of the charging barrel is fixedly connected with an injection molding barrel, one side of the injection molding machine body is fixedly connected with a mold fixing frame, and through the arranged sealing mechanism, the sealing effect between the feeding pipeline and the charging barrel can be enhanced; the liquid leakage phenomenon caused by the influence of thermal expansion and cold contraction on the joint between the feeding pipeline and the feeding pipeline is avoided, the injection molding liquid waste phenomenon is avoided, the injection molding liquid in the charging barrel can be fully and evenly mixed through the arranged stirring mechanism, the plastic melt of the electric pipe fitting is prevented from being bonded to the inner wall of the charging barrel, and the service life of the electric pipe fitting is prolonged. And the discharging speed at the discharging position can be increased.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding technology for electrical conduit fittings, and specifically relates to an injection molding device for the production of electrical conduit fittings. Background Technology

[0002] Electrical conduit fittings play a vital role in power systems. They not only connect and support cables and wires, but also protect them from external damage. During production, electrical conduit fittings are manufactured by extruding parts using injection molding equipment.

[0003] For example, Chinese Utility Model Patent Publication No. (CN218488956U) discloses an injection molding machine for producing power conduits, including a base plate. A single-chip microcomputer is fixedly installed on one end of the upper surface of the base plate. This injection molding machine for producing power conduits has a material barrel and an injection cylinder respectively set and connected by a feed pipe, which allows the material barrel and the injection cylinder to operate synchronously without interference. A mixing unit can assist in stirring the material inside the material barrel, and an electromagnetic heating unit can heat the material inside the material barrel, thereby avoiding the need for preheating the material before processing and enabling uniform heating of the material. The injection unit and nozzle installed inside the injection cylinder can transmit, extrude and spray the heated material in the material barrel, thereby completing the injection work of this injection molding machine for producing power conduits, which can greatly improve the injection effect and injection efficiency of this injection molding machine for producing power conduits.

[0004] However, there are still some shortcomings. For example, the injection liquid is at a high temperature, while the feed pipe is at a normal temperature. When the injection liquid is injected into the feed pipe, thermal expansion and contraction will occur, which will affect the sealing effect between the feed pipe and the feeding pipe. This will lead to leakage at the connection between the feed pipe and the feeding pipe, which will waste the injection liquid and affect the normal use of the injection molding equipment. Utility Model Content

[0005] The purpose of this invention is to provide an injection molding device for the production of electrical conduit fittings, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an injection molding device for producing electrical conduit fittings, comprising an injection molding machine body, a material cylinder fixedly connected to the inner side of the injection molding machine body, the material cylinder being used to store molten plastic for electrical conduit fittings, a feeding pipe being provided at the top of the material cylinder, a sealing mechanism being provided at the top of the feeding pipe, an injection cylinder being fixedly connected to the bottom of the material cylinder, and a mold fixing frame being fixedly connected to one side of the injection molding machine body;

[0007] The sealing mechanism includes a connecting plate located at the top of the feed pipe. A circular sealing tube is fixedly connected to the bottom of the connecting plate. A circular sealing groove matching the circular sealing tube is opened on the top outer wall of the feed pipe. A feeding pipe is fixedly connected to the inner wall of the connecting plate. An inner tube is fixedly connected to the inner wall of the feeding pipe. The inner tube passes through the circular sealing tube. A conical sealing tube is fixedly connected to the bottom of the inner tube. A conical sealing groove matching the conical sealing groove is opened inside the feed pipe. An installation screw is installed through the inside of the connecting plate. An installation screw hole matching the installation screw is opened on the top outer wall of the feed pipe. The installation screw hole is located on the side close to the circular sealing groove.

[0008] In a preferred embodiment, the outer wall of the conical sealing tube is fixedly connected with two rubber sealing lips.

[0009] In a preferred embodiment, the mounting screw is connected to the mounting screw hole by a threaded connection, and the circular sealing tube is connected to the circular sealing groove by an insertion connection.

[0010] In a preferred embodiment, the inside of the barrel is provided with a stirring mechanism, which includes a servo motor detachably connected to the center of the top of the barrel by a cross screw. The output end of the servo motor is fixedly connected to a connecting shaft by a coupling. A stirring rod is fixedly connected to the outer wall of the connecting shaft. The stirring rod is used to stir the molten plastic of the electrical conduit fittings.

[0011] In a preferred embodiment, one end of the stirring rod is fixedly connected to an arc-shaped scraper, and there are two stirring rods and two arc-shaped scrapers.

[0012] In a preferred embodiment, a transverse stirring blade is fixedly connected to one side of the arc-shaped scraper, and longitudinal stirring blades are fixedly connected to the outer surfaces of both the upper and lower ends of the transverse stirring blade. Both the transverse and longitudinal stirring blades are provided with pressure relief holes.

[0013] In a preferred embodiment, a fixed shaft is fixedly connected to the bottom of the connecting shaft, and a spiral feed plate is fixedly connected to the outer wall of the fixed shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The injection molding device for producing electrical conduit fittings, through its sealing mechanism, can enhance the sealing effect between the feed pipe and the material feeder, preventing leakage at the connection between the feed pipe and the material feeder due to thermal expansion and contraction, and avoiding waste of injection molding liquid.

[0016] 2. The injection molding device for producing electrical conduit fittings, through its stirring mechanism, can fully and evenly mix the injection liquid inside the barrel, preventing the molten plastic of the electrical conduit fittings from sticking to the inner wall of the barrel, and can speed up the discharge speed at the outlet. Attached Figure Description

[0017] Figure 1 This is a front view of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the sealing mechanism in this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the stirring mechanism in this utility model.

[0021] In the diagram: 1. Injection molding machine body; 2. Barrel; 3. Feed pipe; 4. Sealing mechanism; 5. Agitating mechanism; 6. Injection barrel; 7. Mold fixing frame; 41. Connecting plate; 42. Circular sealing tube; 43. Feeding pipe; 44. Circular sealing groove; 45. Inner tube; 46. Conical sealing tube; 47. Conical sealing groove; 48. Rubber sealing lip; 49. Mounting screw; 410. Mounting screw hole; 51. Servo motor; 52. Connecting shaft; 53. Agitator; 54. Arc-shaped scraper; 55. Horizontal agitator blade; 56. Vertical agitator blade; 57. Pressure relief hole; 58. Fixed shaft; 59. Spiral feeder blade. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments.

[0023] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0024] Please see Figure 1-4 This utility model provides an injection molding device for the production of electrical conduit fittings, including an injection molding machine body 1, a material cylinder 2 fixedly connected to the inner side of the injection molding machine body 1, the material cylinder 2 being used to store the molten plastic of the electrical conduit fittings, a feeding pipe 3 being provided at the top of the material cylinder 2, a sealing mechanism 4 being provided at the top of the feeding pipe 3, an injection cylinder 6 being fixedly connected to the bottom of the material cylinder 2, and a mold fixing frame 7 being fixedly connected to one side of the injection molding machine body 1.

[0025] During injection molding, the molten plastic of the electrical conduit fittings is stored in the barrel 2, and then injected into the mold through the injection cylinder 6. The mold fixing frame 7 is used to place the mold for processing. An electric push rod is installed inside the mold fixing frame 7. The electric push rod pushes the push plate and the rectangular limiting plate to fix the mold.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the sealing mechanism 4 includes a connecting plate 41 located at the top of the feed pipe 3. A circular sealing tube 42 is fixedly connected to the bottom of the connecting plate 41. A circular sealing groove 44 matching the circular sealing tube 42 is opened on the outer wall of the top of the feed pipe 3. A feeding pipe 43 is fixedly connected to the inner wall of the connecting plate 41. An inner tube 45 is fixedly connected to the inner wall of the feeding pipe 43. The inner tube 45 passes through the circular sealing tube 42. A conical sealing tube 46 is fixedly connected to the bottom of the inner tube 45. A conical sealing groove 46 matching the circular sealing tube 42 is opened inside the feed pipe 3. 7. A matching conical sealing groove 47 is provided. A mounting screw 49 is provided through the inside of the connecting plate 41. The top outer wall of the feed pipe 3 is provided with a mounting screw hole 410 that matches the mounting screw 49. The mounting screw hole 410 is located on the side near the circular sealing groove 44. A rubber sealing lip 48 is fixedly connected to the outer wall of the conical sealing tube 46. There are two rubber sealing lips 48. The mounting screw 49 is connected to the mounting screw hole 410 by thread. The circular sealing tube 42 is connected to the circular sealing groove 44 by plug-in connection.

[0027] In use, the circular sealing tube 42 at the bottom of the connecting plate 41 is inserted into the circular sealing groove 44 on the outer wall of the top of the feed pipe 3 to form a preliminary seal. During the insertion process, the inner tube 45 and the conical sealing tube 46 on the inner wall of the feed pipe 43 will be inserted into the conical sealing groove 47 inside the feed pipe 3, forming a secondary sealing effect with the rubber sealing lip 48. After assembly, the mounting screw 49 is threaded into the mounting screw hole 410 inside the feed pipe 3 to connect the feed pipe 43 and the feed pipe 3 together. The sealing effect at the connection between the feed pipe 43 and the feed pipe 3 is enhanced through multiple sealing methods to prevent leakage at the connection during injection molding.

[0028] like Figure 1 and Figure 4As shown, a stirring mechanism 5 is provided inside the barrel 2. The stirring mechanism 5 includes a servo motor 51 that is detachably connected to the center of the top of the barrel 2 via a cross screw. The output end of the servo motor 51 is fixedly connected to a connecting shaft 52 via a coupling. A stirring rod 53 is fixedly connected to the outer wall of the connecting shaft 52. The stirring rod 53 is used to stir the plastic melt of the electrical fittings. An arc-shaped scraper 54 is fixedly connected to one end of the stirring rod 53. There are two stirring rods 53 and two arc-shaped scrapers 54. A transverse stirring blade 55 is fixedly connected to one side of the arc-shaped scraper 54. A longitudinal stirring blade 56 is fixedly connected to the outer surfaces of both the upper and lower ends of the transverse stirring blade 55. Both the transverse stirring blade 55 and the longitudinal stirring blade 56 are provided with pressure relief holes 57. A fixed shaft 58 is fixedly connected to the bottom of the connecting shaft 52. A spiral feed plate 59 is fixedly connected to the outer wall of the fixed shaft 58.

[0029] In use, after the servo motor 51 is powered on, it drives the connecting shaft 52 to rotate. After the connecting shaft 52 rotates, it drives the stirring rod 53 and the fixed shaft 58 to rotate. After the stirring rod 53 rotates, it drives the arc-shaped scraper 54 to scrape the inner wall of the material cylinder 2. After the arc-shaped scraper 54 rotates, it drives the transverse stirring blade 55 and the longitudinal stirring blade 56 to uniformly stir the plastic melt of the electrical pipe fittings. After the fixed shaft 58 rotates, it drives the spiral feeder 59 to rotate. After the spiral feeder 59 rotates, it can speed up the discharge speed of the discharge port. The pressure relief hole 57 can relieve the pressure generated by the transverse stirring blade 55 and the longitudinal stirring blade 56 when stirring the liquid, and prevent the transverse stirring blade 55 and the longitudinal stirring blade 56 from being broken.

[0030] The working principle of this utility model:

[0031] In use, the circular sealing tube 42 at the bottom of the connecting plate 41 is inserted into the circular sealing groove 44 on the outer wall of the top of the feed pipe 3 to form a preliminary seal. During the insertion process, the inner tube 45 and the conical sealing tube 46 on the inner wall of the feed pipe 43 will be inserted into the conical sealing groove 47 inside the feed pipe 3, forming a secondary sealing effect with the rubber sealing lip 48. After assembly, the mounting screw 49 is threaded into the mounting screw hole 410 inside the feed pipe 3 to connect the feed pipe 43 and the feed pipe 3 together. The sealing effect at the connection between the feed pipe 43 and the feed pipe 3 is enhanced through multiple sealing methods to prevent leakage at the connection during injection molding.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection molding apparatus for producing electrical conduit fittings, comprising an injection molding machine body (1), characterized in that: A material cylinder (2) is fixedly connected to the inner side of the injection molding machine body (1). The material cylinder (2) is used to store the plastic melt of the electrical pipe fittings. A feeding pipe (3) is provided at the top of the material cylinder (2). A sealing mechanism (4) is provided at the top of the feeding pipe (3). An injection cylinder (6) is fixedly connected to the bottom of the material cylinder (2). A mold fixing frame (7) is fixedly connected to one side of the injection molding machine body (1). The sealing mechanism (4) includes a connecting plate (41) located at the top of the feed pipe (3). A circular sealing tube (42) is fixedly connected to the bottom of the connecting plate (41). A circular sealing groove (44) matching the circular sealing tube (42) is opened on the top outer wall of the feed pipe (3). A feeding pipe (43) is fixedly connected to the inner wall of the connecting plate (41). An inner tube (45) is fixedly connected to the inner wall of the feeding pipe (43). The inner tube (45) passes through the circular sealing tube. The inner tube (45) is fixedly connected to a conical sealing tube (46) at the bottom. The feed pipe (3) has a conical sealing groove (47) that matches the conical sealing groove (47) inside. The connecting plate (41) has a mounting screw (49) that runs through it. The top outer wall of the feed pipe (3) has a mounting screw hole (410) that matches the mounting screw (49). The mounting screw hole (410) is located on the side close to the circular sealing groove (44).

2. The injection molding device for producing electrical conduit fittings according to claim 1, characterized in that: The outer wall of the conical sealing tube (46) is fixedly connected with a rubber sealing lip (48), and there are two rubber sealing lips (48).

3. The injection molding device for producing electrical conduit fittings according to claim 1, characterized in that: The mounting screw (49) is connected to the mounting screw hole (410) by a threaded connection, and the circular sealing tube (42) is connected to the circular sealing groove (44) by a plug-in connection.

4. The injection molding device for producing electrical conduit fittings according to claim 1, characterized in that: The material cylinder (2) is equipped with a stirring mechanism (5). The stirring mechanism (5) includes a servo motor (51) that is detachably connected to the center of the top of the material cylinder (2) by a cross screw. The output end of the servo motor (51) is fixedly connected to a connecting shaft (52) by a coupling. A stirring rod (53) is fixedly connected to the outer wall of the connecting shaft (52). The stirring rod (53) is used to stir the plastic melt of the electrical pipe fittings.

5. The injection molding device for producing electrical conduit fittings according to claim 4, characterized in that: One end of the stirring rod (53) is fixedly connected to an arc-shaped scraper (54), and there are two of each of the stirring rod (53) and the arc-shaped scraper (54).

6. The injection molding device for producing electrical conduit fittings according to claim 5, characterized in that: A transverse stirring blade (55) is fixedly connected to one side of the arc-shaped scraper (54). A longitudinal stirring blade (56) is fixedly connected to the outer surfaces of both the upper and lower ends of the transverse stirring blade (55). Both the transverse stirring blade (55) and the longitudinal stirring blade (56) are provided with pressure relief holes (57).

7. The injection molding device for producing electrical conduit fittings according to claim 4, characterized in that: The bottom of the connecting shaft (52) is fixedly connected to a fixed shaft (58), and the outer wall of the fixed shaft (58) is fixedly connected to a spiral feed plate (59).

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