Injection charging barrel of precise injection molding machine

Abstract

The utility model discloses an injection charging barrel of a precise injection molding machine, which is characterized by comprising a charging barrel box body, a heat storage shell fixedly mounted in the charging barrel box body, a charging barrel welded and mounted in the heat storage shell, and a mounting cover body mounted at the top of the charging barrel box body in a butt joint manner, a base plate is welded and mounted on one side of the charging barrel box body, a driving motor is fixedly mounted at the top of the base plate, a spiral pushing rod is mounted in the charging barrel, and one end of the spiral pushing rod penetrates through the charging barrel box body and is fixedly connected with the output end of the charging barrel. While the fan accelerates cooling of the surface of the charging barrel, the driving motor is started to drive the spiral push rod to rotate, and the scrapers scrape the shrunk melt on the inner wall of the charging barrel to facilitate washing, or a cleaning medium is put into the charging barrel, so that the cleaning medium is pushed by the spiral push rod to rub the surface of the inner wall of the charging barrel in the charging barrel, and the surface of the inner wall of the charging barrel is cleaned. Therefore, the washing effect on the interior of the charging barrel is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding machine technology, and specifically relates to an injection barrel for a precision injection molding machine. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. They are classified as vertical, horizontal, and all-electric. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity.

[0003] Domestic utility model patent application number 202421064890.8 discloses an injection molding machine material changing mechanism and injection component that facilitates barrel replacement. It includes a bracket fixed to the upper surface of the injection seat, a base located on the upper end of the bracket, and a barrel. The base has an injection port and a discharge port at its two ends. The barrel slides on the upper surface of the base via a first guide mechanism and can be moved to align with the injection port or discharge port. The lower end of the base slides on the bracket via a second guide mechanism. The base can slide to one side of the cooling water jacket or to the connecting pipe above the cooling water jacket directly opposite the injection port. These improvements significantly enhance the convenience of barrel replacement, saving time and effort. This utility model avoids mixing different molten materials during injection by replacing the barrel. Frequent barrel replacement incurs high costs. For barrels that cannot be replaced, internal cleaning is necessary to prevent mixing of different molten materials. However, molten materials tend to adhere to the inner wall of the barrel after cooling and solidification, making cleaning difficult and affecting the cleaning effect. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an injection barrel for a precision injection molding machine, characterized in that it includes a barrel housing, a heat storage shell fixedly installed inside the barrel housing, a barrel welded to the inside of the heat storage shell, and a mounting cover connected to the top of the barrel housing. A pad is welded to one side of the barrel housing, and a drive motor is fixedly installed on the top of the pad. A spiral push rod is installed inside the barrel, and one end of the spiral push rod passes through the barrel housing and is fixedly connected to the output end of the barrel.

[0005] As a further preferred technical solution of this utility model, a hopper is fixedly installed on the top of the mounting cover, and an inlet pipe is installed through the top of the material cylinder and connected to the bottom of the hopper.

[0006] The injection molding raw material is fed into the barrel through the hopper.

[0007] As a further preferred technical solution of this utility model; multiple sets of exhaust ports are opened around the heat storage shell, a connecting plate is fixedly installed inside the material cylinder box, ventilation openings are opened on both sides of the connecting plate inside the material cylinder box, slide rails are fixedly installed on both ends of the connecting plate on the material cylinder box, two sets of sealing plates are slidably installed on the top of the slide rails, and the bottom of the sealing plates is slidably installed with the sealing plates through sliders.

[0008] The vents inside the barrel can be opened and closed by sliding the sealing plate. This ensures heat storage during the use of the injection molding machine and also allows for adjustment of the barrel's internal cavity size after injection molding to facilitate heat dissipation.

[0009] As a further preferred technical solution of this utility model, a limit block is fixedly installed on the slide rail, and a pull rod is fixedly installed on one side of the sealing plate through the material cylinder box.

[0010] The position of the sealing plate can be adjusted by pulling the lever without disassembling the injection molding machine, and the position of the sealing plate is limited by the limit block.

[0011] As a further preferred technical solution of this utility model; multiple sets of infrared heating coils are fixedly installed around the outside of the material cylinder, a docking nozzle is connected to the end of the material cylinder, the other end of the spiral push rod is fixedly installed to the inner wall of the material cylinder through a bearing seat, and an extrusion port is opened at the end of the material cylinder around the outside of the bearing seat.

[0012] The raw materials fed into the cylinder from the hopper are heated and melted into molten material by an infrared heating coil. The molten material is then pushed out by a drive motor that rotates the spiral push rod.

[0013] As a further preferred technical solution of this utility model, the bottom of the material cylinder box is provided with two sets of installation ports, and a fan is fixedly installed inside the installation ports. A scraper is fixedly installed on the spiral push rod at the edge position.

[0014] After injection molding is completed, during the rinsing process inside the barrel, some molten material remains attached to the inner wall surface of the barrel. By sliding the sealing plate, the heat dissipation channel at the bottom of the barrel is opened, and the fan accelerates the cooling of the inner wall of the barrel, causing the molten material to solidify and shrink on the inner wall surface of the barrel according to the principle of thermal expansion and contraction.

[0015] Beneficial effects

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. After injection molding is completed, during the rinsing process inside the barrel, some molten material remains attached to the inner wall surface of the barrel. By sliding the sealing plate, the heat dissipation channel at the bottom of the barrel is opened, and the fan accelerates the cooling of the inner wall of the barrel. This causes the molten material to solidify and shrink on the inner wall surface of the barrel according to the principle of thermal expansion and contraction, making it easier for it to fall off and improving the cleaning effect inside the barrel.

[0018] 2. While the fan accelerates the cooling of the barrel surface, the drive motor is started to rotate the spiral push rod. The scraper scrapes the wrinkled molten material on the inner wall of the barrel, which is convenient for rinsing. Alternatively, cleaning medium is introduced into the barrel, which is pushed by the spiral push rod to scrape the inner wall surface of the barrel, thereby ensuring the rinsing effect inside the barrel. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the heat storage shell of this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the material cylinder of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the material cylinder box body of this utility model;

[0023] Figure 5 This is a bottom view of the cross-section of the material cylinder box of this utility model.

[0024] In the diagram: 1. Material cylinder housing; 11. Pad plate; 12. Mounting port; 13. Ventilation port; 14. Connecting plate; 15. Sealing plate; 16. Slider; 17. Slide rail; 171. Limiting block; 18. Pull rod; 2. Mounting cover; 21. Hopper; 3. Drive motor; 4. Heat storage shell; 41. Exhaust vent; 5. Infrared heating coil; 6. Material cylinder; 61. Spiral push rod; 62. Scraper; 63. Bearing seat; 64. Extrusion port; 65. Docking nozzle; 66. Feed pipe; 7. Fan. Detailed Implementation

[0025] This specific embodiment is an injection barrel for a precision injection molding machine.

[0026] The above-mentioned utility model avoids the mixing of different melts during injection molding by replacing the barrel. However, the cost of frequently replacing the barrel is high. If the barrel cannot be replaced, it is necessary to clean the inside to prevent different melts from mixing. However, after the melt solidifies upon cooling, it tends to adhere to the inner wall of the barrel, which is not easy to clean and thus affects the cleaning effect of the barrel.

[0027] Its structural diagram is as follows Figures 1-5As shown. An injection barrel for a precision injection molding machine includes a barrel housing 1, a heat storage shell 4 fixedly installed inside the barrel housing 1, a barrel 6 welded to the inside of the heat storage shell 4, and a mounting cover 2 connected to the top of the barrel housing 1. A hopper 21 is fixedly installed on the top of the mounting cover 2. A feed pipe 66 is installed through the top of the barrel 6 and connected to the bottom of the hopper 21. Multiple sets of exhaust ports 41 are opened around the heat storage shell 4. A connecting plate 14 is fixedly installed inside the barrel housing 1. Ventilation ports 13 are opened on both sides of the connecting plate 14 inside the barrel housing 1. Slide rails 17 are fixedly installed on both ends of the connecting plate 14 on the barrel housing 1. Two sets of sealing plates 15 are slidably installed on the top of the slide rails 17, and the bottom of the sealing plates 15 is slidably installed with the sealing plates 15 through sliders 16. The vent 13 inside the barrel housing 1 is opened and closed by sliding the sealing plate 15. This allows for heat storage during injection molding and adjustment of the internal cavity size of the barrel housing 1 after injection molding to facilitate heat dissipation from the barrel 6. A limit block 171 is fixedly installed on the slide rail 17, and a pull rod 18 is fixedly installed through the barrel housing 1 on one side of the sealing plate 15. By pulling the pull rod 18, the position of the sealing plate 15 can be adjusted without disassembling the injection molding machine, and the limit block 171 restricts the position of the sealing plate 15.

[0028] A pad 11 is welded and installed on one side of the material cylinder box 1, and a drive motor 3 is fixedly installed on the top of the pad 11. A spiral push rod 61 is installed inside the material cylinder 6, and one end of the spiral push rod 61 passes through the material cylinder box 1 and is fixedly connected to the output end of the material cylinder 6. Multiple sets of infrared heating coils 5 are fixedly installed around the outside of the material cylinder 6. A docking nozzle 65 is installed at the end of the material cylinder 6. The other end of the spiral push rod 61 is fixedly installed to the inner wall of the material cylinder 6 through a bearing seat 63. An extrusion port 64 is opened at the end of the material cylinder 6 around the outside of the bearing seat 63. The raw material fed into the material cylinder 6 by the hopper 21 is melted into molten material by heating by the infrared heating coils 5, and the spiral push rod 61 is driven by the drive motor 3 to rotate and push the molten material out. Two sets of mounting ports 12 are opened at the bottom of the material cylinder box 1, and a fan 7 is fixedly installed inside the mounting ports 12. A scraper 62 is fixedly installed on the spiral push rod 61 at the edge position. After injection molding is completed, during the rinsing process inside the barrel 6, some molten material remains attached to the inner wall surface of the barrel 6. By sliding the sealing plate 15, the heat dissipation channel at the bottom of the barrel 6 is opened, and the fan 7 accelerates the cooling of the inner wall of the barrel 6. This causes the molten material to solidify and shrink on the inner wall surface of the barrel 6 according to the principle of thermal expansion and contraction, making it easier to detach and improving the cleaning effect inside the barrel 6. While the fan 7 accelerates the cooling of the surface of the barrel 6, the drive motor 3 is started to drive the spiral push rod 61 to rotate. The scraper 62 scrapes the molten material that has shrunk on the inner wall of the barrel 6, facilitating rinsing. Alternatively, cleaning medium metal balls can be introduced into the barrel 6, which are pushed by the spiral push rod 61 to scrape the inner wall surface of the barrel 6, thus ensuring the rinsing effect inside the barrel 6.

[0029] Example 1: The injection molding material is fed into the barrel 6 through the hopper 21. The material fed into the barrel 6 through the hopper 21 is heated and melted into molten material by the infrared heating coil 5. The drive motor 3 drives the spiral push rod 61 to rotate and push the molten material out. After the injection molding is completed, during the rinsing process inside the barrel 6, the heat dissipation channel at the bottom of the barrel 6 is opened by sliding the sealing plate 15. The fan 7 accelerates the cooling of the inner wall of the barrel 6, causing the molten material to solidify and shrink on the inner wall surface of the barrel 6 according to the principle of thermal expansion and contraction, making it easier to fall off and improving the cleaning effect inside the barrel 6.

[0030] Example 2: While the fan 7 accelerates the cooling of the surface of the barrel 6, the drive motor 3 is started to drive the spiral push rod 61 to rotate, and the scraper 62 scrapes the wrinkled molten material on the inner wall of the barrel 6 to facilitate rinsing.

[0031] All technical features in this embodiment can be freely combined according to actual needs.

[0032] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. An injection barrel for a precision injection molding machine, characterized in that, The device includes a barrel housing (1), a heat storage shell (4) fixedly installed inside the barrel housing (1), a barrel (6) welded inside the heat storage shell (4), and a mounting cover (2) connected to the top of the barrel housing (1). A pad (11) is welded to one side of the barrel housing (1), and a drive motor (3) is fixedly installed on the top of the pad (11). A spiral push rod (61) is installed inside the barrel (6), and one end of the spiral push rod (61) passes through the barrel housing (1) and is fixedly connected to the output end of the barrel (6).

2. The injection barrel of a precision injection molding machine according to claim 1, characterized in that: The top of the mounting cover (2) is fixedly installed with a hopper (21), and the top of the material cylinder (6) is connected to the bottom of the hopper (21) with a feed pipe (66).

3. The injection barrel of a precision injection molding machine according to claim 1, characterized in that: The heat storage shell (4) has multiple sets of exhaust vents (41) around its circumference. A connecting plate (14) is fixedly installed inside the material cylinder box (1). Ventilation vents (13) are provided on both sides of the connecting plate (14) inside the material cylinder box (1). Slide rails (17) are fixedly installed on both ends of the connecting plate (14) on the material cylinder box (1). Two sets of sealing plates (15) are slidably installed on the top of the slide rails (17), and the bottom of the sealing plates (15) is slidably installed with the sealing plates (15) through sliders (16).

4. The injection barrel of a precision injection molding machine according to claim 3, characterized in that: A limit block (171) is fixedly installed on the slide rail (17), and a pull rod (18) is fixedly installed on one side of the sealing plate (15) through the material cylinder box (1).

5. The injection barrel of a precision injection molding machine according to claim 1, characterized in that: Multiple sets of infrared heating coils (5) are fixedly installed around the outside of the material cylinder (6). A docking nozzle (65) is installed at the end of the material cylinder (6). The other end of the spiral push rod (61) is fixedly installed to the inner wall of the material cylinder (6) through a bearing seat (63). An extrusion port (64) is opened at the end of the material cylinder (6) around the outside of the bearing seat (63).

6. The injection barrel of a precision injection molding machine according to claim 1, characterized in that: The bottom of the material cylinder box (1) is provided with two sets of installation ports (12), and a fan (7) is fixedly installed inside the installation port (12). A scraper (62) is fixedly installed on the spiral push rod (61) at the edge position.

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