Metal powder injection molding equipment

Abstract

The utility model relates to the technical field of injection molding equipment, in particular to metal powder injection molding equipment which comprises a molding cylinder, a molding groove is formed in the molding cylinder, a limiting ring is installed at the position, close to the top end, of the inner wall of the molding groove, an ejection structure is installed in the molding groove, and the ejection structure comprises four sets of limiting cylinders. A mounting ring is mounted on the side surface of the forming cylinder, two sets of electric push rods are mounted at the top end of the mounting ring, and the top ends of the two sets of electric push rods are both mounted to the bottom end of a mounting disc. Through the arrangement of parts such as a limiting barrel, a compression spring, an ejector plate, a mounting ring, an electric push rod, a mounting disc, a feeding barrel, an injection pipe, a motor, a mounting rod, a stirring roller, a scraping plate and a feeding hole, the problems that in the process from material conveying to injection molding of existing injection molding equipment, metal powder is prone to thermal shrinkage and condensation can be effectively solved; the non-uniform or hardening condition is caused during injection molding, so that the injection molding quality is influenced.

Description

Technical Field

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

[0002] The development of metal powder injection molding is remarkable. Injection molding has been used in the ceramics and plastics industries for many years, but it has only recently begun to be used in the metallurgical industry. Although the market for metal powder injection molded products is still very limited, it has huge potential. Injection molding is a molding method that combines molding and plasticizing. It involves placing mixed granules or powder into the barrel of an injection molding machine, and then applying pressure to the plasticized metal powder with the help of a plunger or screw. The high-temperature fluid is then injected into a pre-closed low-temperature mold cavity through a nozzle and gating system. After cooling and solidification, the mold is opened and the product is ejected to obtain a product with a certain geometric shape and precision.

[0003] However, during the material feeding and injection molding process, metal powder is prone to thermal shrinkage and condensation, which can lead to unevenness or hardening during injection molding, thus affecting the injection molding quality. Therefore, corresponding improvements are needed to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a metal powder injection molding device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a metal powder injection molding equipment, comprising a molding cylinder, wherein a molding groove is provided inside the molding cylinder, and a limiting ring is installed on the inner wall of the molding groove near the top end; an ejection structure is installed inside the molding groove, and the ejection structure includes four sets of limiting cylinders; an installation ring is installed on the side surface of the molding cylinder, and two sets of electric push rods are installed at the top end of the installation ring; the top ends of the two sets of electric push rods are installed with the bottom end of the installation plate; a feeding mechanism is installed inside the installation plate, and the feeding mechanism includes a feeding cylinder.

[0006] Preferably, the bottom ends of the four sets of limiting cylinders are all installed with the inner wall of the bottom end of the forming groove, and compression springs are installed on the inner wall of the bottom end of the forming groove near the inside of the limiting cylinders, and the top ends of the four sets of compression springs are all installed with the bottom end of the ejector plate.

[0007] Preferably, injection tubes are connected to both sides of the top of the feed cylinder, and a motor is installed at the middle of the top of the feed cylinder, with the output end of the motor being connected to an installation rod.

[0008] Preferably, a number of stirring rollers are installed on the side surface of the mounting rod, and four scrapers are installed on the side surface of the mounting rod near the bottom.

[0009] Preferably, the side surface of the feeding mechanism has several sets of feeding holes at the bottom end.

[0010] Preferably, the ejector plate is located inside the forming groove, and the outer diameter of the ejector plate is adapted to the inner diameter of the forming groove.

[0011] Preferably, the four sets of limiting cylinders are arranged in a centrally symmetrical manner with the center point of the forming groove as the center point.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By incorporating components such as a limiting cylinder, compression spring, ejector plate, mounting ring, electric push rod, mounting plate, feed cylinder, injection tube, motor, mounting rod, stirring roller, scraper, and feed hole, the problem of metal powder easily shrinking and condensing during the material feeding process in existing injection molding equipment can be effectively solved. This can lead to uneven injection or hardening, which in turn affects the quality of the injection molding. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the main body of this utility model.

[0015] Figure 2 This is a three-dimensional half-section diagram of the molding cylinder of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the ejection structure of this utility model.

[0017] In the diagram: 1. Molding cylinder; 11. Molding groove; 12. Limiting ring; 2. Ejection structure; 21. Limiting cylinder; 22. Compression spring; 23. Ejection plate; 3. Mounting ring; 31. Electric push rod; 32. Mounting plate; 4. Feeding mechanism; 41. Feeding cylinder; 42. Injection tube; 43. Motor; 44. Mounting rod; 45. Agitating roller; 46. Scraper; 47. Feeding hole. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] according to Figures 1-3As shown, the device includes a forming cylinder 1, which has a forming groove 11 inside. A limiting ring 12 is installed on the inner wall of the forming groove 11 near the top. An ejection structure 2 is installed inside the forming groove 11. The ejection structure 2 includes four sets of limiting cylinders 21. The four sets of limiting cylinders 21 are arranged symmetrically around the center point of the forming groove 11. The bottom ends of the four sets of limiting cylinders 21 are installed with the bottom inner wall of the forming groove 11. Compression springs 22 are installed on the bottom inner wall of the forming groove 11 near the inside of the limiting cylinders 21. The top ends of the four sets of compression springs 22 are installed with the bottom end of the ejection plate 23. The ejection plate 23 is located inside the forming groove 11, and the outer diameter of the ejection plate 23 is adapted to the inner diameter of the forming groove 11. The top surface of the ejection plate 23 is fitted with the bottom surface of the limiting ring 12.

[0020] An installation ring 3 is installed on the side surface of the forming cylinder 1, and two sets of electric push rods 31 are installed on the top of the installation ring 3. The top of the two sets of electric push rods 31 are installed with the bottom of the installation plate 32.

[0021] The mounting plate 32 houses a feeding mechanism 4, which includes a feeding cylinder 41. The bottom of the feeding cylinder 41 is open, and injection tubes 42 are connected to both sides of the top of the feeding cylinder 41. A motor 43 is mounted near the center of the top of the feeding cylinder 41, and the output of the motor 43 is connected to a mounting rod 44. A through hole is formed on the inner wall of the top of the feeding cylinder 41 near the mounting rod 44, through which the top of the mounting rod 44 passes. Several sets of stirring rollers 45 are installed on the side surface of the mounting rod 44 on the inner wall of the top, and four sets of scrapers 46 are installed on the side surface of the mounting rod 44 near the bottom. The several sets of stirring rollers 45 are equidistant and arranged in a circumferential array on the side surface of the mounting rod 44, and the four sets of scrapers 46 are arranged symmetrically with respect to the center point of the mounting rod 44. Several sets of feeding holes 47 are opened on the side surface of the feeding mechanism 4 near the bottom. The several sets of feeding holes 47 are equidistant and arranged in a circumferential array on the side surface of the feeding cylinder 41.

[0022] In use, the operator can start the two sets of electric push rods 31, causing the mounting plate 32 to move downwards. This causes the feeding mechanism 4 to move downwards, allowing the feeding cylinder 41 to move into the forming groove 11. The bottom of the feeding cylinder 41 then contacts the top surface of the ejector plate 23 and presses it downwards. This causes the four compression springs 22 to contract downwards. At this time, metal powder can be injected into the feeding mechanism 4 through the two injection tubes 42. Simultaneously, the motor 43 can be started, causing the mounting rod 44 to rotate. This causes the stirring rollers 45 and the four scrapers 46 to rotate accordingly, allowing the metal powder to be stirred and compressed. The stirring operation is performed by the rotation of several sets of stirring rollers 45 and four sets of scrapers 46, which prevents the metal powder from shrinking or condensing due to heat, thus avoiding unevenness or hardening during injection molding and affecting the injection molding quality. At this time, the metal powder can fall into the top surface of the ejector plate 23 through several sets of feed cylinders 41 and the bottom of the feed cylinders 41 for injection molding. After the metal powder is injection molded, the user can move the mounting plate 32 upward to the initial height through two sets of electric push rods 31. At this time, the four sets of compression springs 22 will move the ejector plate 23 upward under the action of their own elastic restoring force, so that the top surface of the ejector plate 23 can be fitted with the bottom surface of the limiting ring 12, thereby completing the ejection operation of the material and facilitating the removal of the injection molded material.

[0023] 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 and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal powder injection molding apparatus, comprising a molding cylinder (1), characterized in that: The forming cylinder (1) has a forming groove (11) inside, and a limiting ring (12) is installed on the inner wall of the forming groove (11) near the top. The forming groove (11) has an ejection structure (2) inside, and the ejection structure (2) includes four sets of limiting cylinders (21). The side surface of the forming cylinder (1) is equipped with an installation ring (3), and two sets of electric push rods (31) are installed at the top of the installation ring (3). The tops of the two sets of electric push rods (31) are installed with the bottom of the installation plate (32). The installation plate (32) has a feeding mechanism (4) inside, and the feeding mechanism (4) includes a feeding cylinder (41).

2. The metal powder injection molding equipment according to claim 1, characterized in that: The bottom ends of the four sets of limiting cylinders (21) are all installed with the bottom inner wall of the forming groove (11), and compression springs (22) are installed on the bottom inner wall of the forming groove (11) near the inside of the limiting cylinders (21). The top ends of the four sets of compression springs (22) are all installed with the bottom end of the ejector plate (23).

3. The metal powder injection molding equipment according to claim 1, characterized in that: The top of the feed cylinder (41) is connected to injection tubes (42) on both sides, and a motor (43) is installed at the top of the feed cylinder (41) near the middle. The output end of the motor (43) is connected to an installation rod (44).

4. The metal powder injection molding equipment according to claim 3, characterized in that: The side surface of the mounting rod (44) is equipped with several sets of stirring rollers (45), and four sets of scrapers (46) are installed on the side surface of the mounting rod (44) near the bottom.

5. The metal powder injection molding equipment according to claim 1, characterized in that: The feeding mechanism (4) has several sets of feeding holes (47) on its side surface near the bottom.

6. The metal powder injection molding equipment according to claim 2, characterized in that: The ejector plate (23) is located inside the forming groove (11), and the outer diameter of the ejector plate (23) is adapted to the inner diameter of the forming groove (11).

7. The metal powder injection molding equipment according to claim 1, characterized in that: The four sets of limiting cylinders (21) are arranged in a centrally symmetrical manner with the center point of the forming groove (11) as the center point.

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