Secondary ejection plate structure for plastic mold

Abstract

The utility model relates to plastic mould ejection technology field discloses a kind of secondary ejection plate structure for plastic mould, including fixed base, the upper surface of the fixed base is fixedly connected with connecting frame, the upper surface of the connecting frame is provided with lower mould, the upper surface of the lower mould is provided with upper mould, the inside of the lower mould is provided with material rod, the outer wall of the fixed base is fixedly connected with fixed frame, the inside of the connecting frame is fixedly connected with hydraulic rod and positioning column, the output end of the hydraulic rod is through the inside of fixed frame and is fixedly connected with transmission frame, the upper surface of the transmission frame is fixedly connected with spring one. In the utility model, by the cooperation between fixed frame, hydraulic rod, transmission frame, spring one, positioning column, ejector rod and electric push rod, material rod is first ejected to separate from the inside of lower mould, then lower mould is pressed against material rod to separate from the outer wall of ejector rod, the demoulding of material rod is realized, so as to avoid material rod to be easily stuck on mould, cause press mould or damage mould.

Description

Technical Field

[0001] This utility model relates to the field of plastic mold ejection technology, and in particular to a structure for a secondary ejection plate for plastic molds. Background Technology

[0002] Plastic molds are specialized processing equipment used for molding and processing plastic products. Under the action of an injection molding machine, molten plastic is injected into the mold cavity, and after cooling and solidification, a plastic product with a certain shape and dimensional accuracy is obtained. In traditional mold ejection processes, the product and the sprue are often ejected simultaneously. However, because the sprue easily adheres to the mold cavity, if it is not removed in time, it may cause mold compression or damage during mold closing. Therefore, a secondary ejection plate structure is required.

[0003] The secondary ejection plate structure used in plastic molds is an improved time-sharing ejection device based on the traditional mold ejection mechanism. In the existing technology, after the ejector roller of the injection molding machine moves, the sprue and the product are ejected from the mold at the same time. The sprue sticks to the mold film from time to time, and the residual mold is difficult to remove, which causes the mold to be damaged by the pressure. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a secondary ejection plate structure for plastic molds, which aims to improve the problems of simultaneous ejection of sprue and product, intermittent sticking of sprue to the mold, and difficulty in removing residual mold material.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A secondary ejection plate structure for a plastic mold includes a fixed base, a connecting frame fixedly connected to the upper surface of the fixed base, a lower mold disposed on the upper surface of the connecting frame, an upper mold disposed on the upper surface of the lower mold, a material rod disposed inside the lower mold, a fixed frame fixedly connected to the outer wall of the fixed base, a hydraulic rod and a positioning column fixedly connected inside the connecting frame, the output end of the hydraulic rod penetrating the interior of the fixed frame and fixedly connected to a transmission frame, a spring fixedly connected to the upper surface of the transmission frame, the outer wall of the spring fixedly connected to the interior of the fixed frame, a push rod fixedly connected inside the transmission frame, an electric push rod fixedly connected inside the fixed frame, the output end of the electric push rod penetrating the interior of the connecting frame and fixedly connected to the lower surface of the lower mold, and auxiliary components disposed inside the connecting frame.

[0006] The above technical solution involves an inlet located inside the upper mold for easy connection with the injection molding component. When the upper and lower molds are tightly fitted, a groove is provided inside the upper mold, and an auxiliary component is provided inside the connecting frame, extending upward through the lower mold to match the groove. This facilitates injection molding through the cavity formed between the upper and lower molds, thereby forming the material rod. A positioning post is provided inside the connecting frame, with grooves in both the lower and upper molds matching the positioning post. This facilitates positioning the movement of the upper mold and restricts the movement of the lower mold, thus ensuring proper fit between the upper and lower molds.

[0007] Preferably, the auxiliary component includes a second spring, one end of which is fixedly connected to the inside of the connecting frame, and the other end of which is fixedly connected to the upper surface of the transmission frame.

[0008] Preferably, the outer wall of the push rod is slidably connected to the inside of the fixed frame, the connecting frame and the lower mold, the top end of the push rod is disposed on the outer wall of the material rod, and the outer wall of the material rod is disposed inside the upper mold.

[0009] Preferably, the outer wall of the transmission frame is slidably connected to the inner wall of the fixed seat, and the outer wall of the positioning column is disposed inside the lower mold and the upper mold.

[0010] Preferably, limit rods are fixedly connected to all four sides of the transmission frame, and the outer walls of the limit rods are slidably connected to the interior of the connecting frame and the lower mold.

[0011] Preferably, four positioning posts are provided, and the positioning posts are distributed around the connecting frame.

[0012] This utility model has the following beneficial effects: 1. In this utility model, through the cooperation between the fixed frame, hydraulic rod, transmission frame, spring, positioning column, push rod and electric push rod, the material rod is first pushed out of the interior of the lower mold, and then the lower mold holds the material rod to separate it from the outer wall of the push rod, thereby realizing the demolding of the material rod. This avoids the material rod from sticking to the mold, causing mold pressing or damage, and makes the production process more stable.

[0013] 2. In this utility model, the material rod can be ejected twice by moving the ejector rod and the lower mold, which can quickly separate the sprue from the product, thereby improving the molding cycle and achieving the effect of simple mold structure and low cost. Attached Figure Description

[0014] Figure 1 This is a perspective view of a secondary ejection plate structure for plastic molds proposed in this utility model; Figure 2This is a partial structural diagram of a material rod for a secondary ejection plate structure in a plastic mold, as proposed in this utility model. Figure 3 This is a cross-sectional view of the internal structure of a connecting frame for a secondary ejection plate structure of a plastic mold proposed in this utility model. Figure 4 This is a partial structural diagram of a push rod for a secondary ejector plate structure in a plastic mold, as proposed in this utility model.

[0015] Legend: 1. Fixed base; 2. Connecting frame; 3. Lower mold; 4. Upper mold; 5. Fixed frame; 6. Hydraulic rod; 7. Transmission frame; 8. Spring 1; 9. Positioning pin; 10. Push rod; 11. Material rod; 12. Electric push rod; 13. Spring 2; 14. Limiting rod. Detailed Implementation

[0016] 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.

[0017] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention provides an embodiment of a secondary ejection plate structure for a plastic mold, comprising a fixed base 1, a connecting frame 2 fixedly connected to the upper surface of the fixed base 1, a lower mold 3 disposed on the upper surface of the connecting frame 2, an upper mold 4 disposed on the upper surface of the lower mold 3, a material rod 11 disposed inside the lower mold 3, a fixed frame 5 fixedly connected to the outer wall of the fixed base 1, a hydraulic rod 6 and a positioning column 9 fixedly connected inside the connecting frame 2, the output end of the hydraulic rod 6 passing through the interior of the fixed frame 5 and fixedly connected to a transmission frame 7, a spring 8 fixedly connected to the upper surface of the transmission frame 7, the outer wall of the spring 8 fixedly connected to the interior of the fixed frame 5, a push rod 10 fixedly connected inside the transmission frame 7, an electric push rod 12 fixedly connected inside the fixed frame 5, the output end of the electric push rod 12 passing through the interior of the connecting frame 2 and fixedly connected to the lower surface of the lower mold 3, and auxiliary components disposed inside the connecting frame 2. Specifically, the fixed base 1 and the upper mold 4 can be configured horizontally to facilitate the ejection of the material rod 11. During this process, the material rod 11, by its own weight, automatically falls to the lower side between the lower mold 3 and the upper mold 4, making it easy to collect the ejected material rod 11. The fixed base 1 provides fixation for the connecting frame 2 and the fixed frame 5, thus facilitating the upward movement of the transmission frame 7 and the ejector rod 10 by the hydraulic rod 6. Under the action of the spring 8, the transmission frame 7 and the ejector rod 10 are easily reset. Simultaneously, the electric push rod 12 facilitates the pushing of the lower mold 3 towards... The ejector rod 10 is positioned at a suitable location inside the lower mold 3 to move or reset, avoiding interference with the molding of the material rod 11 while maintaining contact with the ejector rod 10 for convenient subsequent ejection operations. The movement of the ejector rod 10 and the lower mold 3 facilitates secondary ejection of the material rod 11, preventing it from sticking to the mold and causing mold compression or damage. The ejector rod 11 can be replaced by the ejector roller connected to the injection molding machine via the pushing action of the hydraulic rod 6 and the electric push rod 12, with different ejector rollers achieving different ejection effects.

[0018] Reference Figure 1 and Figure 3 The auxiliary component includes a second spring 13, one end of which is fixedly connected to the inside of the connecting frame 2, and the other end of which is fixedly connected to the upper surface of the transmission frame 7. Specifically, the setting of spring 2 13 makes the movement of transmission frame 7 smoother, and also facilitates the reset of transmission frame 7 and its connecting structure after movement, thereby achieving an auxiliary effect on the movement of transmission frame 7.

[0019] Reference Figure 2 and Figure 3 The outer wall of the ejector rod 10 is slidably connected to the inside of the fixed frame 5, the connecting frame 2 and the lower mold 3. The top end of the ejector rod 10 is set on the outer wall of the material rod 11, and the outer wall of the material rod 11 is set inside the upper mold 4. The outer wall of the transmission frame 7 is slidably connected to the inner wall of the fixed seat 1, and the outer wall of the positioning column 9 is set inside the lower mold 3 and the upper mold 4. Specifically, the movement of the ejector rod 10 is offset and restricted by the interior of the fixed frame 5, the connecting frame 2, and the lower mold 3. The top of the ejector rod 10 is flush with the lower mold 3, which facilitates the forming of the material rod 11. At the same time, the movement of the lower mold 3 facilitates the ejection of the material rod 11 out of the interior of the lower mold 3. The movement of the transmission frame 7 is offset and restricted by the inner wall of the fixed seat 1. The positioning post 9 facilitates the positioning and offset restriction of the movement of the upper mold 4.

[0020] Reference Figure 2 Limiting rods 14 are fixedly connected to all four sides of the transmission frame 7. The outer wall of the limiting rods 14 is slidably connected to the inside of the connecting frame 2 and the lower mold 3. Four positioning pins 9 are provided and distributed around the connecting frame 2. Specifically, the setting of the limiting rod 14, which is distributed around the transmission frame 7, facilitates the offset restriction of the movement of the lower mold 3. The positioning pins 9 are distributed around the connecting frame 2. The fixing of the connecting frame 2 and the positioning pins 9 facilitates the further restriction of the movement of the lower mold 3.

[0021] Working principle: When using this structure, the upper mold 4 is moved towards the lower mold 3. Positioned by the positioning pin 9, the upper mold 4 and lower mold 3 are tightly fitted together. Injection molding is performed on the cavity between the lower mold 3 and upper mold 4 through the feed inlet inside the upper mold 4. After molding, the upper mold 4 is moved outwards to detach. First, the hydraulic rod 6 pulls the transmission frame 7 upwards, causing the positioning pin 9 and limit rod 14 to move upwards, compressing the spring 8 and spring 13. The movement of the positioning pin 9 ejects the ejector rod 11, causing it to detach from the internal groove of the lower mold 3. Then, the electric... The push rod 12 pushes the lower mold 3, causing the lower mold 3 to move upward under the limitation of the positioning pin 9 and the limiting rod 14. The movement of the lower mold 3 pushes the material rod 11 upward, thereby causing the material rod 11 to disengage from the ejector rod 10, thus realizing the secondary ejection of the mold and avoiding the material rod 11 remaining at the sprue. At the same time, the fixed base 1 and the upper mold 4 can be arranged horizontally. When demolding the material rod 11, the weight of the material rod 11 itself is used to facilitate the demolding and collection of the material rod 11. During the use of this structure, it not only solves the problem of the material rod 11 easily remaining in the lower mold 3, but also achieves the effect of simple structure and low cost.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A structure for a secondary ejection plate in a plastic mold, comprising a fixed base (1), characterized in that: A connecting frame (2) is fixedly connected to the upper surface of the fixed base (1). A lower mold (3) is provided on the upper surface of the connecting frame (2). An upper mold (4) is provided on the upper surface of the lower mold (3). A material rod (11) is provided inside the lower mold (3). A fixed frame (5) is fixedly connected to the outer wall of the fixed base (1). A hydraulic rod (6) and a positioning column (9) are fixedly connected inside the connecting frame (2). The output end of the hydraulic rod (6) passes through the interior of the fixed frame (5) and is fixedly connected to a transmission frame (7). A spring (8) is fixedly connected to the upper surface of the transmission frame (7). The outer wall of the spring (8) is fixedly connected to the interior of the fixed frame (5). A top rod (10) is fixedly connected inside the transmission frame (7). An electric push rod (12) is fixedly connected inside the fixed frame (5). The output end of the electric push rod (12) passes through the interior of the connecting frame (2) and is fixedly connected to the lower surface of the lower mold (3). An auxiliary component is provided inside the connecting frame (2).

2. The structure of a secondary ejection plate for a plastic mold according to claim 1, characterized in that: The auxiliary component includes a second spring (13), one end of which is fixedly connected to the inside of the connecting frame (2), and the other end of which is fixedly connected to the upper surface of the transmission frame (7).

3. The structure of a secondary ejection plate for a plastic mold according to claim 1, characterized in that: The outer wall of the top rod (10) is slidably connected to the inside of the fixed frame (5), the connecting frame (2) and the lower mold (3). The top end of the top rod (10) is set on the outer wall of the material rod (11), and the outer wall of the material rod (11) is set inside the upper mold (4).

4. The structure of a secondary ejection plate for a plastic mold according to claim 1, characterized in that: The outer wall of the transmission frame (7) is slidably connected to the inner wall of the fixed seat (1), and the outer wall of the positioning column (9) is set inside the lower mold (3) and the upper mold (4).

5. The structure of a secondary ejector plate for a plastic mold according to claim 1, characterized in that: Limiting rods (14) are fixedly connected around the transmission frame (7), and the outer wall of the limiting rods (14) is slidably connected to the inside of the connecting frame (2) and the lower mold (3).

6. The structure of a secondary ejection plate for a plastic mold according to claim 1, characterized in that: Four positioning posts (9) are provided, and the positioning posts (9) are distributed around the connecting frame (2).

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