Inverted ejection structure of ejector pin oil cylinder of two-plate machine

Abstract

The utility model discloses a two-plate machine ejector pin oil cylinder inverted ejection structure which comprises an ejector pin guide plate, four guide column installation holes are formed in the four corners of the ejector pin guide plate, and an ejection oil cylinder fixing hole is formed in the center of the ejector pin guide plate. The four ejector pin guide columns are respectively mounted on the four guide column mounting holes of the ejector pin guide plate; the ejector pin plate is arranged below the ejector pin guide plate, a lubricating copper sleeve is arranged between the ejector pin guide column and the ejector pin plate, two main ejector pin rods are arranged on each of four stacked edges of the ejector pin plate, and an auxiliary ejector pin rod is further arranged on the ejector pin plate; the ejector pin guide column is fixed on the second plate through a guide column fixing ring; and the ejection oil cylinder and the ejector pin ejection oil cylinder are arranged between the second plate and the ejector pin plate. The ejection oil cylinder is reversely arranged on the ejector pin guide plate, and the stroke of the oil cylinder is in the cavity of the two plates, so that the length of the whole set of ejection structure can be saved, and the space of the length of the whole oil cylinder can be shortened for the whole length of a large two-plate machine with a longer ejector pin stroke.

Description

Technical Field

[0001] This utility model relates to the field of two-plate machine technology, specifically to a reverse ejection structure for a two-plate machine ejector pin cylinder. Background Technology

[0002] In traditional two-plate ejector machines, the ejector cylinder is mounted directly on the ejector plate. The piston rod of the ejector cylinder is fixed to the ejector plate. When the cylinder moves, the cylinder body remains stationary, while the piston rod drives the ejector plate forward and backward to complete the entire ejection and retraction action. The traditional two-plate ejector structure is not compact enough, has a relatively long overall length, and is inconvenient to operate during use.

[0003] Therefore, this application proposes an inverted ejection structure for a two-plate machine ejector cylinder. This ejection structure mounts the ejector cylinder upside down on the ejector guide plate, and the cylinder stroke is within the cavity of the two plates. This can save the length of the entire ejection structure, and for large two-plate machines with long ejector strokes, it can shorten the overall length of the cylinder. Utility Model Content

[0004] Purpose of the utility model: To solve the problems of insufficient compactness, excessive overall length, and inconvenience in operation of the existing two-plate ejector structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A two-plate mill ejector pin cylinder inverted ejection structure, comprising:

[0007] The ejector guide plate has four guide post mounting holes at its four corners and an ejector cylinder fixing hole at its center.

[0008] The guide post is provided with four guide post mounting holes respectively installed on the four guide post mounting holes of the ejector pin guide plate. The guide post is fixedly installed to the ejector pin guide plate by two upper and lower locking nuts.

[0009] The ejector plate is located below the ejector guide plate. The guide post also passes through the ejector plate. A lubricating copper sleeve is installed between the guide post and the ejector plate. Two main ejector rods are provided on each of the four stacked sides of the ejector plate. A secondary ejector rod is also provided on the ejector plate.

[0010] The guide post is fixed to the second plate by a guide post fixing ring;

[0011] The ejector cylinder is installed between the second plate and the ejector plate, and the fixed ejector cylinder is installed with the ejector guide plate by a fixing nut.

[0012] Furthermore, the ejector cylinder includes:

[0013] Cylinder block;

[0014] The piston rod has one end penetrating the cylinder body and the other end extending out of the cylinder body being integrally installed with the ejector pin guide plate.

[0015] The front cover is fixed to the ejector plate by screws;

[0016] The piston is disposed inside the rear end of the cylinder and is sleeved on the piston rod;

[0017] The rear cover is located at the rear end of the cylinder body and is secured to the second plate;

[0018] A pull rod, which abuts against the inner cavity wall of the two plates and the rear cover.

[0019] Furthermore, a first oil port is provided at the front end of the piston rod, and a second oil port is provided on the front cover.

[0020] Furthermore, when the ejector mechanism is working, oil enters through the first port of the ejector cylinder. When hydraulic oil enters the rodless chamber of the cylinder through the first port from the internal cavity of the piston rod, oil exits through the second port. The hydraulic oil in the rodless chamber of the ejector cylinder pushes the rear cover to the right, and the ejector plate also moves to the right. The main ejector rod and the auxiliary ejector rod are fixed on the ejector plate as a whole. When the ejector cylinder moves to the right, it drives the ejector rod to move to the right, pushing the plastic product in the mold cavity out of the mold cavity. After the ejection action is completed, the directional valve on the oil circuit switches the power source to enter through the second port, and the first port becomes the return port. The entire cylinder drives the ejector plate, the main ejector rod, and the auxiliary ejector rod to move to the left, completing the ejection action.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] The ejection structure of this application saves the length of the entire ejection structure by reversing the ejection cylinder and mounting it on the ejector guide plate. The cylinder stroke is within the cavity of the two plates. For large two-plate machines with long ejector strokes, the overall length of the cylinder can be shortened. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a cross-sectional view of the present invention.

[0025] In the diagram: 1. Guide post; 2. Ejector guide plate; 3. Locking nut; 5. Ejector plate; 6. Second plate; 7. Ejector guide post fixing half ring; 8. Main ejector rod; 9. Ejector cylinder; 10. Secondary ejector rod; 11. Fixing nut; 13. Piston rod; 14. Front cover; 15. Cylinder body; 16. Piston; 17. Rear cover; 18. Tie rod; 19. First oil port; 20. Second oil port. Detailed Implementation

[0026] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0027] Applicant's design Figure 1-2 The above describes a two-plate machine ejector cylinder inverted ejection structure, comprising: an ejector guide plate 2, with four guide post 1 mounting holes at its four corners and an ejector cylinder 9 fixing hole at its center; four guide posts 1, each mounted on one of the four guide post 1 mounting holes on the ejector guide plate 2, and fixed to the ejector guide plate 2 by two locking nuts 3; an ejector plate 5, located below the ejector guide plate 2, with the guide posts 1 passing through it, and a lubricating copper sleeve installed between the guide posts 1 and the ejector plate 5; two main ejector rods 8 on each of the four stacked edges of the ejector plate 5, and a secondary ejector rod 10 on the ejector plate 5; a second plate 6, with the guide posts 1 fixed to the second plate 6 by guide post 1 fixing rings; and an ejector cylinder 9, installed between the second plate 6 and the ejector plate 5, and fixed to the ejector guide plate 2 by fixing nuts 11.

[0028] In this embodiment, the inverted ejection structure of the two-plate machine ejector cylinder can be further optionally configured such that the ejector cylinder 9 includes: a cylinder body 15; a piston rod 13, one end of which passes through the cylinder body 15 and the other end extending out of the cylinder body 15 is integrally installed with the ejector guide plate 2; a front cover 14, which is fixed to the ejector plate 5 by screws; a piston 16, which is disposed inside the rear end of the cylinder body 15 and sleeved on the piston rod 13; a rear cover 17, which is disposed at the rear end of the cylinder body 15 and is secured to the two-plate 6; and a pull rod 18, which abuts against the inner cavity wall of the two-plate 6 and the rear cover 17.

[0029] In this embodiment, the two-plate machine ejector cylinder inverted ejection structure is further provided with a first oil port 19 at the front end of the piston 16 rod 13 and a second oil port 20 on the front cover 14.

[0030] The working principle of the inverted ejection structure of the two-plate machine ejector cylinder in this embodiment is as follows: When the ejector mechanism is working, oil enters through the first oil port 19 of the ejector cylinder. Since the ejector guide plate 1 and the piston rod 13 are fixed together, the ejector guide plate 2 is fixed on the two plates 6 by four ejection guide posts 1. The ejector plate 5 and the front cover 14 are fixed together by screws. A lubricating copper sleeve is installed between the ejector plate 5 and the ejection guide post 1, which can slide on the guide post. When hydraulic oil enters the rodless chamber of the cylinder through port 1 from the internal cavity of piston rod 13, oil exits from port 20. Since the piston rod is fixed, the hydraulic oil in the rodless chamber of the ejector cylinder pushes the rear cover 17 of the ejector cylinder to move to the right. The ejector plate 5 is fixed to the ejector cylinder 9, so the ejector plate 5 also moves to the right. The main ejector rod 8 and the auxiliary ejector rod 10 are fixed on the ejector plate 5 as a whole. When the cylinder moves to the right, it drives all the ejector rods to move to the right, which can eject the plastic product in the mold cavity from the mold. After the ejection action is completed, the directional valve in the oil circuit switches the power source to oil from port 20. Similarly, since the piston rod 13 is fixed, the hydraulic oil from port 20 enters the rod chamber of the ejector cylinder, and port 19 becomes the return oil chamber. In this way, the entire cylinder drives the ejector plate 5, the main ejector rod 8 and the auxiliary ejector rod 10 to move to the left, completing the ejection action.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A reverse-mounted ejection structure for a two-platen machine's ejector pin cylinder, characterized in that, include: The ejector guide plate has four guide post mounting holes at its four corners and an ejector cylinder fixing hole at its center. The guide post is provided with four guide post mounting holes respectively installed on the four guide post mounting holes of the ejector pin guide plate. The guide post is fixedly installed to the ejector pin guide plate by two upper and lower locking nuts. The ejector plate is located below the ejector guide plate. The guide post also passes through the ejector plate. A lubricating copper sleeve is installed between the guide post and the ejector plate. Two main ejector rods are provided on each of the four stacked sides of the ejector plate. A secondary ejector rod is also provided on the ejector plate. The guide post is fixed to the second plate by a guide post fixing ring; An ejector cylinder is installed between the second plate and the ejector plate, and the ejector cylinder is connected to the ejector guide plate by a fixing nut.

2. The inverted ejection structure of the ejector pin cylinder for a two-platen machine according to claim 1, characterized in that, The ejection cylinder includes: Cylinder block; The piston rod has one end penetrating the cylinder body and the other end extending out of the cylinder body being integrally installed with the ejector pin guide plate. The front cover is fixed to the ejector plate by screws; The piston is disposed inside the rear end of the cylinder and is sleeved on the piston rod; The rear cover is located at the rear end of the cylinder body and is secured to the second plate; A pull rod, which abuts against the inner cavity wall of the two plates and the rear cover.

3. The inverted ejection structure of the ejector pin cylinder for a two-platen machine according to claim 2, characterized in that, The piston rod has a first oil port at its front end and a second oil port on the front cover.

4. The inverted ejection structure of the ejector pin cylinder for a two-platen machine according to claim 3, characterized in that, When the ejector mechanism is working, oil enters through the first port of the ejector cylinder. When hydraulic oil enters the rodless chamber of the cylinder through the first port from the internal cavity of the piston rod, oil exits through the second port. The hydraulic oil in the rodless chamber of the ejector cylinder pushes the rear cover to the right, and the ejector plate also moves to the right. The main ejector rod and the auxiliary ejector rod are fixed on the ejector plate as a whole. When the ejector cylinder moves to the right, it drives the ejector rod to move to the right, pushing the plastic product in the mold cavity out of the mold cavity. After the ejection action is completed, the directional valve in the oil circuit switches the power source to enter through the second port, and the first port becomes the return oil chamber. The entire cylinder drives the ejector plate, the main ejector rod, and the auxiliary ejector rod to move to the left, completing the ejection action.

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