Demolding rear-pulling structure of plastic product

Abstract

The utility model discloses a demoulding rear-pulling structure of a plastic product, which belongs to the technical field of injection moulds and comprises a mould core plate and a mould core backing plate, a first guide pillar is slidably mounted in the mould core plate and the mould core backing plate, and the lower end of the first guide pillar is fixedly connected with a secondary ejector plate. A primary ejector plate and a primary ejector base plate are slidably mounted on the lower portion of the first guide column, a first spring is fixedly connected to the primary ejector plate, after the mold core base plate slides to the lower limit along the first guide column, the mold core base plate is made to be close to the mold core plate, the inner sliding block is jacked upwards through the mold core base plate, and a product is jacked upwards through the inner sliding block. Compared with a sliding block mold opening mode, the mold opening structure is simplified in the mode that a product is jacked up through the inner sliding block by utilizing the buffering acting force of the second spring, so that the cost is reduced, and compared with an ejector pin demolding mode, the demolding stability is guaranteed, the product quality is improved, and the practicability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and particularly relates to a demoulding and rear-drawing structure for plastic products. Background Art

[0002] In industrial production, various molds and tools are used to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping and other methods. In short, the mold is a tool used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material.

[0003] Plastic parts are not easy to demold at an angle. The use of a slider structure will complicate the mold opening structure and reduce mold precision, which will ultimately lead to insufficient product appearance and precision, resulting in the low practicality of conventional injection molds.

[0004] Therefore, we propose a plastic product demoulding and post-extraction structure to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the problem of low practicability of conventional injection molds and proposes a post-mold extraction structure for plastic products.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A post-demolding and extraction structure for a plastic product comprises a mold plate and a mold pad, wherein a first guide column is slidably installed inside the mold plate and the mold pad, a secondary ejector plate is fixedly connected to the lower end of the first guide column, a primary ejector plate and a primary ejector pad are slidably installed on the lower part of the first guide column, a first spring is fixedly connected to the primary ejector plate, an upper end of the first spring is fixedly installed on the lower end of the mold plate, the first spring movably penetrates the mold pad, the lower end of the mold plate is also fixedly connected to a second spring, the second spring movably penetrates the mold pad, a second guide column is fixedly connected to the mold pad, the mold plate slidably penetrates the mold plate, a first oblique column and a second oblique column are installed on the mold plate, the lower ends of the first oblique column and the second oblique column are connected to the mold pad, an inner sliding block is clamped between the first oblique column and the second oblique column, and the inner sliding block is connected to the lower end of the mold plate and the mold plate. The mold plate is pressed downward to compress the first spring, until the mold pad slides to the lower limit along the first guide column, and the mold pad is brought close to the mold plate. The mold pad is used to push the inner slider upward, so that the inner slider pushes the product upward, and the second spring is used to buffer the force. The product is lifted by the inner slider. Compared with the slider mold opening, the mold opening structure is simplified, thereby reducing the cost. Compared with the ejector demolding method, the demolding stability is guaranteed and the product quality is improved.

[0008] Preferably, a buffer pad is fixedly connected to the primary ejector plate. When the second spring buffers to the limit, the buffer pad is used for final buffering, which is convenient for limiting and buffering.

[0009] Preferably, a buffer block is fixedly connected to the lower end of the secondary ejector plate. When the mold is transferred, the buffer block is used to buffer the impact force, thereby facilitating the protection of the mold.

[0010] Preferably, the first inclined column comprises a first column body, and a material guide hole and a first die groove are formed on the upper part of the first column body. When the first inclined column is offset from the inner slider, the material guide hole is offset from the product, so that the product and the scraps are separated from the product, and the scraps are automatically disconnected during demoulding.

[0011] Preferably, the second inclined column comprises a second column body, and a second mold groove is formed at the upper end of the second column body.

[0012] Preferably, the inner slide comprises a shell frame, and a third die groove is formed at the upper end of the shell frame to facilitate the bottom forming of the product.

[0013] Preferably, the inner slider further comprises a reinforcement strip, which is fixedly connected to the outer end of the shell frame, so as to increase the stability of the inner slider.

[0014] In summary, the technical effects and advantages of the utility model are as follows:

[0015] 1. Press the mold plate downward to compress the first spring, until the mold pad slides to the lower limit along the first guide column, and then the mold pad is close to the mold plate. The mold pad is used to push the inner slider upward, so that the inner slider pushes the product upward, and the second spring is used to buffer the force. The product is pushed up by the inner slider. Compared with the slider mold opening, the mold opening structure is simplified, thereby reducing the cost. Compared with the ejector demolding method, the demolding stability is guaranteed, the product quality is improved, and the practicality is improved.

[0016] 2. When the first inclined column is offset from the inner slider, the guide hole is offset from the product, so that the product and the scraps are separated from the product, which is convenient for automatically disconnecting the scraps during demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall segmentation structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the first inclined column structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the second inclined column structure of the utility model;

[0020] Figure 4This is a schematic diagram of the inner slider structure of the utility model.

[0021] In the figure: 1. mold core plate; 2. first oblique column; 3. second oblique column; 4. inner slide block; 5. mold core pad; 6. first guide column; 7. primary ejector plate; 8. primary ejector pad; 9. secondary ejector plate; 10. first spring; 11. second spring; 12. second guide column; 13. buffer pad; 14. buffer block; 21. first column; 22. material guide hole; 23. first die groove; 31. second column; 32. second die groove; 41. shell frame; 42. third die groove; 43. reinforcement strip. DETAILED DESCRIPTION

[0022] The technical solutions in the utility model embodiments will be described clearly and completely below in conjunction with the drawings in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, rather than all of the embodiments.

[0023] Reference Figure 1 , a post-demolding extraction structure for a plastic product, comprising a mold plate 1 and a mold pad 5, wherein a first guide column 6 is slidably installed inside the mold plate 1 and the mold pad 5, a secondary ejector plate 9 is fixedly connected to the lower end of the first guide column 6, a primary ejector plate 7 and a primary ejector pad 8 are slidably installed at the lower part of the first guide column 6, a first spring 10 is fixedly connected to the primary ejector plate 7, an upper end of the first spring 10 is fixedly installed at the lower end of the mold plate 1, the first spring 10 movably penetrates the mold pad 5, a second spring 11 is also fixedly connected to the lower end of the mold plate 1, the second spring 11 movably penetrates the mold pad 5, a second guide column 12 is fixedly connected to the mold pad 5, the mold plate 1 slides through the mold plate 1, a first oblique column 2 and a second oblique column 3 are installed on the mold plate 1, the lower ends of the first oblique column 2 and the second oblique column 3 are connected to the mold pad 5, an inner slider 4 is sandwiched between the first oblique column 2 and the second oblique column 3, and the inner slider 4 and the lower end of the mold plate 1 are connected to the mold plate 1.

[0024] Reference Figure 1 A buffer pad 13 is fixedly connected to the primary ejector plate 7. When the second spring 11 buffers to the limit, the buffer pad 13 is used for the final buffering.

[0025] Reference Figure 1 The lower end of the secondary ejector plate 9 is fixedly connected with a buffer block 14. When the mold is transferred, the buffer block 14 is used to buffer the impact force.

[0026] Reference Figure 1 and 2 The first inclined column 2 includes a first column 21, the lower part of which is connected to the mold core pad 5, and the upper part of the first column 21 is provided with a material guide hole 22 and a first mold groove 23. When the first inclined column 2 is offset from the inner slider 4, the material guide hole 22 is offset from the product, so that the product and the scraps are separated from the product.

[0027] Reference Figure 1 and 3 The second inclined column 3 includes a second column 31, the lower end of the second column 31 is connected to the mold core pad 5, and the upper end of the second column 31 is provided with a second mold groove 32. The second mold groove 32 is used for product forming.

[0028] Reference Figure 1 and 4 The inner slide block 4 includes a frame 41, the lower end of the frame 41 is connected to the mold plate 1, and the upper end of the frame 41 is provided with a third die groove 42. The third die groove 42 is used for forming the bottom of the product.

[0029] Reference Figure 1 and 4 The inner slider 4 further includes a reinforcing strip 43, which is fixedly connected to the outer end of the frame 41. The reinforcing strip 43 is used to increase the stability of the inner slider 4.

[0030] Working principle: Press the mold plate 1 downward to compress the first spring 10, until the mold pad 5 slides to the lower limit along the first guide column 6, and then the mold pad 5 is close to the mold plate 1, and the mold pad 5 is used to push the inner slider 4 upward, so that the inner slider 4 pushes the product upward, and the second spring 11 is used to buffer the force. The method of lifting the product through the inner slider 4 simplifies the mold opening structure compared with the slider mold opening, thereby reducing the cost, and ensures the demolding stability compared with the ejector demolding method.

[0031] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to it. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the utility model according to the technical scheme and utility model concept of the utility model, which should be covered by the protection scope of the utility model.

[0032] The description briefly mentions the application direction of the utility model for the prior art that is known to those skilled in the art and has not been changed, and combines it with the utility model to form a complete technology; the description avoids over-popularizing the technology familiar to those skilled in the art, and is used to assist those skilled in the art to quickly understand the main content of the utility model.

Claims

1. A demoulding and post-extraction structure for a plastic product, characterized in that: The invention comprises a mold plate (1) and a mold pad (5), wherein a first guide column (6) is slidably mounted inside the mold plate (1) and the mold pad (5), a secondary ejector plate (9) is fixedly connected to the lower end of the first guide column (6), a primary ejector plate (7) and a primary ejector pad (8) are slidably mounted on the lower part of the first guide column (6), a first spring (10) is fixedly connected to the primary ejector plate (7), the upper end of the first spring (10) is fixedly mounted on the lower end of the mold plate (1), the first spring (10) movably penetrates the mold pad (5), and the mold plate (1) The lower end of the mold is also fixedly connected to a second spring (11), the second spring (11) movably penetrates the mold pad (5), the mold pad (5) is fixedly connected to a second guide column (12), the mold plate (1) slides through the mold plate (1), the mold plate (1) is installed with a first inclined column (2) and a second inclined column (3), the lower ends of the first inclined column (2) and the second inclined column (3) are connected to the mold pad (5), an inner slide block (4) is sandwiched between the first inclined column (2) and the second inclined column (3), and the lower end of the inner slide block (4) and the mold plate (1) are connected to the mold plate (1).

2. A plastic product demoulding and post-extraction structure according to claim 1, characterized in that: A buffer pad (13) is fixedly connected to the primary ejector plate (7).

3. The post-demolding structure for plastic products according to claim 1, characterized in that: A buffer block (14) is fixedly connected to the lower end of the secondary ejector plate (9).

4. The post-demolding structure for plastic products according to claim 1, characterized in that: The first inclined column (2) comprises a first column body (21), and a material guide hole (22) and a first mold groove (23) are provided on the upper part of the first column body (21).

5. The demoulding and post-extraction structure of a plastic product according to claim 1, characterized in that: The second inclined column (3) comprises a second column body (31), and a second mold groove (32) is formed at the upper end of the second column body (31).

6. The demoulding and post-extraction structure of a plastic product according to claim 1, characterized in that: The inner slide block (4) comprises a shell frame (41), and a third mold groove (42) is formed at the upper end of the shell frame (41).

7. A plastic product demoulding and post-extraction structure according to claim 6, characterized in that: The inner slide block (4) further comprises a reinforcement strip (43), wherein the reinforcement strip (43) is fixedly connected to the outer end of the shell frame (41).

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