An ejector mechanism for a vertical injection molding machine

Abstract

The utility model discloses a kind of vertical injection molding machine inner ejector pin mechanism, it includes: ejection needle, ejector pin cylinder shaft, upper flange and die cylinder body of mould cylinder. Ejector pin cylinder shaft drives ejection needle up and down movement in upper flange block to complete ejection action, while ejector pin push plate drives electronic ruler pull rod up and down movement to record the ejection distance of ejection needle, control precision can be within 0.1mm, ensure the precision of injection molding equipment ejection distance. When needing to do small product, can only leave the ejection needle on the ejector pin push plate required, the rest is more torn down;When needing to do big product, can install all ejection needle, increase ejection contact part area, prevent product deformation when ejecting;Ejector pin push plate right end is equipped with bearing, and ejector pin guide plate is installed on the right side wall of upper flange of mould cylinder, bearing and the guide groove sliding fit in the middle of ejector pin guide plate, guarantee the stability of ejection working process.

Description

Technical Field

[0001] This utility model relates to the field of internal ejector pin technology, and in particular to an internal ejector pin mechanism for a vertical injection molding machine. Background Technology

[0002] In the injection molding cycle, molten plastic is injected into the mold cavity and, after cooling and solidification, forms the finished product. An ejection system is necessary to remove the molded product from the mold cavity. The ejector pin mechanism is the core actuator of the ejection system.

[0003] The existing internal ejector pins perform ejection and retraction actions by moving up and down inside the upper flange of the mold cylinder. Because the ejector pin cylinder shaft is installed inside the upper flange of the mold cylinder, it is impossible to install an electronic ruler to control the ejection and retraction distance. The only way to control the ejection and retraction distance is to use a controller to set the time. It is difficult to adjust to the accurate position in this way. Sometimes the distance is 1-2mm different from the required distance. Moreover, since a single ejector pin is driven by the ejector pin cylinder shaft, it is easy to deform large products and produce defective products. Therefore, it is not suitable for the production of large products. Utility Model Content

[0004] The purpose of this utility model is to provide an internal ejector pin mechanism for a vertical injection molding machine, which solves the technical problems of inaccurate ejection distance and limited ejection of products in existing injection molding equipment.

[0005] To achieve the above objectives, a vertical injection molding machine internal ejector mechanism is provided, comprising: an ejector pin, an ejector cylinder shaft, a mold cylinder upper flange, and a mold cylinder body. An ejector push plate is provided in the mold cylinder upper flange. The lower end of the ejector pin is fixedly mounted on the upper surface of the ejector push plate. An upper flange block is fixedly connected to the bottom center of the mold cylinder upper flange. An ejector cylinder shaft is slidably connected to the inner wall of the upper flange block. A fixing plate is fixedly connected to the upper end of the ejector cylinder shaft. The upper end of the fixing plate is fixedly connected to the bottom center of the ejector push plate. An electronic ruler fixing plate is fixedly connected to the lower left outer wall of the mold cylinder upper flange. An electronic ruler is fixedly connected to the left side wall of the electronic ruler fixing plate. The upper end of the pull rod in the electronic ruler is fixedly connected to the bottom surface of the left end of the ejector push plate. A pin guide plate is fixedly connected to the upper right side wall of the upper flange of the mold cylinder. A bearing is slidably connected to the inner wall of the guide groove opened in the middle of the pin guide plate. A bearing connecting shaft connects and fixes the right end of the pin push plate to the bearing.

[0006] According to the aforementioned ejector pin mechanism in a vertical injection molding machine, the ejector pins can be detached from the ejector pin push plate, and the number of ejector pins can be selected as needed.

[0007] According to the aforementioned ejector pin mechanism of a vertical injection molding machine, the outer wall of the left end of the bearing connecting shaft is threadedly connected to the middle of the right end of the ejector pin push plate, and the outer wall of the right end of the bearing connecting shaft is fixedly connected to the inner wall of the bearing.

[0008] According to the aforementioned ejector pin mechanism of a vertical injection molding machine, the lower end of the upper flange of the mold cylinder is fixedly connected to the upper end of the mold cylinder body.

[0009] According to the aforementioned ejector pin mechanism of a vertical injection molding machine, a lower flange of the mold cylinder is fixedly connected to the lower end of the mold cylinder body, and a mold cylinder spindle is slidably connected to the inner wall of the lower flange of the mold cylinder.

[0010] According to the ejector mechanism of a vertical injection molding machine, an ejector flange is fixedly connected to the upper center of the upper flange block, an ejector cylinder cover is fixedly connected to the upper end of the ejector flange, and an ejector cover is provided in the middle of the ejector cylinder cover and the ejector flange.

[0011] According to the aforementioned ejector pin mechanism in a vertical injection molding machine, the upper outer wall of the ejector pin cylinder shaft is slidably connected to the middle part of the ejector pin cover.

[0012] According to the aforementioned ejector pin mechanism of a vertical injection molding machine, the outer wall of the lower end of the ejector pin cylinder shaft is slidably connected to the inner wall of the upper flange block.

[0013] The above-mentioned solution has the following beneficial effects: 1. The ejector cylinder shaft moves up and down within the upper flange block, driving the ejector pins to move up and down to complete the ejection action. Simultaneously, the ejector push plate moves up and down, driving the electronic ruler pull rod to record the ejection distance of the ejector pins. The control accuracy can be within 0.1mm, greatly improving the positional accuracy of the ejector pins and ensuring the precision of the ejection distance of the injection molding equipment. When making small products, only the required ejector pins on the ejector push plate can be retained, and the rest can be removed. When making large products, all ejector pins on the ejector push plate can be installed to increase the ejection contact area and prevent product deformation during ejection. 2. A bearing is provided at the right end of the ejector plate, and an ejector guide plate is installed on the right side wall of the upper flange of the mold cylinder. The bearing and the guide groove opened in the ejector guide plate slide together to ensure the stability of the demolding process.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a perspective view of an internal ejector pin mechanism for a vertical injection molding machine according to the present invention. Figure 2 This is a perspective view of the assembled internal ejector pin mechanism of a vertical injection molding machine according to the present invention. Figure 3 This is a cross-sectional view of an internal ejector pin mechanism for a vertical injection molding machine according to the present invention. Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0016] Legend: 1. Ejector pin; 2. Ejector pin guide plate; 3. Bearing connecting shaft; 4. Bearing; 5. Ejector pin push plate; 6. Fixing plate; 7. Ejector pin cylinder cover; 8. Ejector pin cover; 9. Ejector pin flange; 10. Ejector pin cylinder shaft; 11. Mold cylinder upper flange; 1101. Upper flange block; 12. Electronic ruler fixing plate; 13. Electronic ruler; 14. Mold cylinder body; 15. Mold cylinder lower flange; 16. Mold cylinder mandrel. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] Reference Figure 1-3 This utility model discloses an ejector mechanism for a vertical injection molding machine, comprising: an ejector pin 1, an ejector cylinder shaft 10, a mold cylinder upper flange 11, and a mold cylinder body 14. An ejector push plate 5 is disposed in the mold cylinder upper flange 11. The lower end of the ejector pin 1 is fixedly mounted on the upper surface of the ejector push plate 5. An upper flange block 1101 is fixedly connected to the bottom center of the mold cylinder upper flange 11. The ejector cylinder shaft 10 is slidably connected to the inner wall of the upper flange block 1101. A fixing plate 6 is fixedly connected to the upper end of the ejector cylinder shaft 10. The upper end of the fixing plate 6 is connected to the bottom of the ejector push plate 5. The middle part is fixedly connected. The ejector cylinder shaft 10 drives the fixed plate 6 to move up and down. The fixed plate 6 drives the ejector push plate 5 to move up and down. The ejector push plate 5 drives the ejector pin 1 to move up and down, completing the ejection and ejection process. The lower left outer wall of the upper flange 11 of the mold cylinder is fixedly connected to the electronic ruler fixed plate 12. The left side wall of the electronic ruler fixed plate 12 is fixedly connected to the electronic ruler 13. The upper end of the pull rod in the electronic ruler 13 is fixedly connected to the bottom left end of the ejector push plate 5. The electronic ruler 13 can record the moving distance of the ejector push plate 5 to ensure the accuracy of ejection. Reference Figure 4 A pin guide plate 2 is fixedly connected to the upper right side wall of the upper flange 11 of the mold cylinder. A bearing 4 is slidably connected to the inner wall of the guide groove opened in the middle of the pin guide plate 2. A bearing connecting shaft 3 connects and fixes the right end of the pin push plate 5 to the bearing 4. When the pin push plate 5 moves up and down, the guide groove opened in the middle of the pin guide plate 2 slides with the bearing 4, which can ensure the stability of the ejection and ejection process.

[0019] Reference Figure 1-3Ejector pin 1 can be removed from ejector plate 5. The number of ejector pins 1 can be selected as needed. When making small products, only the required ejector pins 1 on ejector plate 5 can be left, and the rest can be removed. When making large products, all ejector pins 1 on ejector plate 5 can be installed to increase the contact area of ​​the ejection part and prevent the product from deforming during ejection. The outer wall of the left end of bearing connecting shaft 3 is threaded to the middle of the right end of ejector plate 5. The outer wall of the right end of bearing connecting shaft 3 is fixedly connected to the inner wall of bearing 4. The lower end of mold cylinder upper flange 11 is fixedly connected to the upper end of mold cylinder body 14. The lower end of mold cylinder body 14 is fixedly connected to mold cylinder lower flange 15. A mold cylinder mandrel 16 is slidably connected to the inner wall of the lower flange 15 of the mold cylinder. During the injection molding demolding process, the mold cylinder mandrel 16 moves upward to fit against the bottom surface of the upper flange block 1101, ensuring the stability of the overall device during operation. An ejector flange 9 is fixedly connected to the upper middle part of the upper flange block 1101. An ejector cylinder cover 7 is fixedly connected to the upper end of the ejector flange 9. An ejector cover 8 is set in the middle of the ejector cylinder cover 7 and the ejector flange 9. The upper outer wall of the ejector cylinder shaft 10 is slidably connected to the middle of the ejector cover 8, ensuring the stability of the ejector cylinder shaft 10 when it moves up and down. The lower outer wall of the ejector cylinder shaft 10 is slidably connected to the inner wall of the upper flange block 1101, realizing the up and down movement of the ejector cylinder shaft 10.

[0020] Working principle: During ejection, the ejector cylinder shaft 10 drives the fixed plate 6 to move up and down, and the fixed plate 6 drives the ejector push plate 5 to move up and down. When the ejector push plate 5 moves up and down, the ejector guide plate 2, which is fixed to the right wall of the upper flange 11 of the mold cylinder, has a guide groove in the middle and slides with the bearing 4 installed at the right end of the ejector push plate 5, which can ensure the stability of the ejection and retraction process. The ejector push plate 5 drives the ejector pin 1 to move up and down to complete the ejection and retraction process. An electronic ruler 13 is fixed to the left wall of the upper flange 11 of the mold cylinder. The upper end of the pull rod in the electronic ruler 13 is fixed to the left end of the ejector push plate 5. When the ejector plate 5 moves up and down, it will drive the electronic ruler 13 to move up and down, so that the electronic ruler 13 can record the moving distance of the ejector plate 5, ensuring that the ejector pin 1 is ejected accurately. The ejector pin 1 can be removed from the ejector plate 5. The number of ejector pins 1 can be selected as needed. When making small products, only the required ejector pins 1 on the ejector plate 5 can be left, and the rest can be removed. When making large products, all the ejector pins 1 on the ejector plate 5 can be installed to increase the contact area of ​​the ejection part and prevent the product from deforming when ejected.

[0021] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An ejector pin mechanism for a vertical injection molding machine, comprising: Ejector pin (1), ejector pin cylinder shaft (10), upper flange of mold cylinder (11) and mold cylinder body (14), characterized in that an ejector pin push plate (5) is provided in the upper flange of mold cylinder (11), the lower end of the ejector pin (1) is fixedly mounted on the upper surface of the ejector pin push plate (5), an upper flange block (1101) is fixedly connected to the bottom middle of the upper flange of mold cylinder (11), an ejector pin cylinder shaft (10) is slidably connected to the inner wall of the upper flange block (1101), a fixing plate (6) is fixedly connected to the upper end of the ejector pin cylinder shaft (10), the upper end of the fixing plate (6) is fixedly connected to the bottom middle of the ejector pin push plate (5), an electronic ruler fixing plate (12) is fixedly connected to the lower left outer wall of the upper flange of mold cylinder (11), an electronic ruler (13) is fixedly connected to the left side wall of the electronic ruler fixing plate (12), and the upper end of the pull rod in the electronic ruler (13) is fixedly connected to the bottom surface of the left end of the ejector pin push plate (5); The upper right side wall of the upper flange (11) of the mold cylinder is fixedly connected to the ejector guide plate (2), and the inner wall of the guide groove opened in the middle of the ejector guide plate (2) is slidably connected to the bearing (4). The right end of the ejector push plate (5) is connected and fixed to the bearing (4) by a bearing connecting shaft (3).

2. The ejector pin mechanism of a vertical injection molding machine according to claim 1, characterized in that, The ejector pin (1) can be detached from the ejector plate (5), and the number of ejector pins (1) can be selected as needed.

3. The ejector pin mechanism of a vertical injection molding machine according to claim 1, characterized in that, The outer wall of the left end of the bearing connecting shaft (3) is threaded to the middle of the right end of the ejector plate (5), and the outer wall of the right end of the bearing connecting shaft (3) is fixedly connected to the inner wall of the bearing (4).

4. The ejector pin mechanism of a vertical injection molding machine according to claim 1, characterized in that, The lower end of the upper flange (11) of the mold cylinder is fixedly connected to the upper end of the mold cylinder body (14).

5. The ejector pin mechanism of a vertical injection molding machine according to claim 1, characterized in that, The lower end of the mold cylinder body (14) is fixedly connected to the mold cylinder lower flange (15), and the inner wall of the mold cylinder lower flange (15) is slidably connected to the mold cylinder spindle (16).

6. The ejector pin mechanism of a vertical injection molding machine according to claim 1, characterized in that, The upper flange block (1101) is fixedly connected to the middle part of the upper flange block (9), and the upper end of the ejector flange (9) is fixedly connected to the ejector cylinder cover (7). The ejector cylinder cover (7) and the middle part of the ejector flange (9) are provided with an ejector cover (8).

7. The ejector pin mechanism of a vertical injection molding machine according to claim 6, characterized in that, The upper outer wall of the ejector cylinder shaft (10) is slidably connected to the middle part of the ejector cover (8).

8. The ejector pin mechanism of a vertical injection molding machine according to claim 1, characterized in that, The lower outer wall of the ejector cylinder shaft (10) is slidably connected to the inner wall of the upper flange block (1101).

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