High-precision slider with injection mold

Abstract

This invention relates to a high-precision slider-fit injection mold, comprising: a first slider, which includes a driving part and a connecting part; the driving part has an oblique hole for a guide post to pass through; the connecting part has an inclined extending groove; and the groove has edging on both sides of its extension direction, with the groove extending into the edging. A second slider is slidably disposed within the groove, with a portion extending into the edging. A third slider is fixed to the second slider and extends into the mold cavity to shape the product; the third slider has an elongated hole. A fourth slider has a guide pin inserted into the elongated hole, thereby engaging the fourth slider with the third slider; the fourth slider also extends into the mold cavity to shape the product. A mold core has a slide rail pointing towards the mold cavity, with the third and fourth sliders disposed within the slide rail. This design improves product precision.

Description

Technical Field

[0001] This invention relates to a high-precision slider-fit injection mold. Background Technology

[0002] like Figure 1 and Figure 2 The product shown is manufactured by injection molding, in which Figure 2 for Figure 1 The bottom side view shows the product requirements: the symmetry between the carbon brush grooves on both sides and the center circle must be 0.05, and the parallelism must be 0.05. Existing molds make it difficult to meet these dimensional standards. To improve machining accuracy and ensure the product dimensions are within acceptable limits, a new mold structure is needed. Summary of the Invention

[0003] The purpose of this invention is to provide a high-precision slider for use with injection molds, thereby solving the problem of how to improve product processing accuracy.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] This invention provides a high-precision slider-fit injection mold, comprising:

[0006] The first slider includes a driving part and a connecting part. The driving part is provided with an inclined hole for the inclined guide post to pass through. The connecting part is provided with an inclined extending groove. The two sides of the groove extending in the direction of extension are provided with a edging. The groove extends into the edging.

[0007] The second slider is slidably disposed within the groove, and a portion of the second slider extends into the edging.

[0008] The third slider is fixed on the second slider and extends into the mold cavity to shape the product. An elongated hole is provided in the third slider.

[0009] The fourth slider is provided with a guide pin, which is inserted into the elongated hole so that the fourth slider cooperates with the third slider. The fourth slider also extends into the mold cavity to shape the product.

[0010] The mold core has a slide rail pointing towards the mold cavity, and the third slider and the fourth slider are disposed within the slide rail.

[0011] Preferably, the fourth slider has two positioning grooves on its outer side and also includes a positioning block corresponding to the positioning groove, the front end of which is used to insert into the positioning groove.

[0012] Furthermore, a spring is provided at the rear end of the positioning block, and the spring is used to press the positioning block against the positioning groove.

[0013] Furthermore, the positioning groove is wedge-shaped, and the front end of the positioning block is also wedge-shaped.

[0014] Preferably, the size of the second slider is larger than the size of the slide rail, so that the stroke of the third slider is limited by the second slider pressing against the outside of the mold core.

[0015] Preferably, the length of the elongated hole is 15 mm.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0017] The high-precision slider of this invention, used in conjunction with an injection mold, features a slide rail within the mold core. The third and fourth sliders slide within this slide rail. Since the slide rail is not a separate component, its position is precise, thus improving product accuracy. The first slider is driven by a slanted guide post, and the movement of the guide post is converted into a core-pulling action of the second slider through the sliding of the second slider within a groove. The third slider, connected to the second slider, can move or pull out of the mold cavity. The fourth slider engages with the third slider, and a guide pin on the fourth slider inserts into an elongated hole in the third slider, creating a certain relative non-moving length between the third and fourth sliders, which is the length of the elongated hole. This results in a greater stroke for the third slider than for the fourth slider, saving the fourth slider's stroke, reducing wear on the fourth slider, and improving product accuracy. Attached Figure Description

[0018] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0019] Figure 1 This is a perspective view of the product obtained by the preferred embodiment of the high-precision slider and injection mold of the present invention;

[0020] Figure 2 yes Figure 1 Another viewpoint;

[0021] Figure 3 This is a three-dimensional schematic diagram of the structure of the high-precision slider in conjunction with the injection mold.

[0022] Figure 4 yes Figure 3 Enlarged view of point A in the image;

[0023] Figure 5 yes Figure 3 Mid-section view;

[0024] Figure 6 yes Figure 5 Enlarged view of point B in the image;

[0025] Figure 7 It is a three-dimensional schematic diagram of the mold core;

[0026] Figure 8 This is a magnified view of the first slider section, with the cover removed;

[0027] The reference numerals in the attached figures are explained as follows:

[0028] 1. Product; 11. Carbon brush holder; 12. Center circle;

[0029] 2. Mold core; 21. Slide;

[0030] 3. First slider; 31. Drive part; 32. Connecting part; 33. Angled hole; 34. Slide groove; 35. Edge binding; 36. Butt joint groove;

[0031] 4. Angled guide post;

[0032] 5. Second slider; 51. Fixing pin;

[0033] 6. Third slider; 61. Long hole;

[0034] 7. Fourth slider; 71. Guide pin; 72. Positioning groove;

[0035] 8. Positioning block;

[0036] 9. Spring;

[0037] 10. Protective cover;

[0038] 20. Fixing the cover;

[0039] 22. Pad;

[0040] 23. Connecting column. Detailed Implementation

[0041] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] like Figure 3 The diagram shown is a three-dimensional representation of a high-precision slider in conjunction with an injection mold, mainly showing the rear mold section, while the inclined guide post 4 belongs to the front mold section. Figure 5 yes Figure 1 A cross-section of the diagram.

[0045] like Figure 6 , Figure 6 yes Figure 5 Enlarged view at point B. The rear mold includes a backing plate 22 and a mold core 2. A slidable first slider 3 is provided on the backing plate 22. The first slider 3 is provided with an inclined hole 33, through which an inclined guide post 4 passes. When the inclined guide post 4 moves up and down, it drives the first slider 3 to move left and right on the backing plate 22 (the backing plate 22 is provided with an elongated hole for the displacement of the inclined guide post 4). The first slider 3 includes a driving part 31 and a connecting part 32. The driving part 31 extends horizontally, and the connecting part 32 is used to connect to one end of the driving part 31 for slidable connection with the second slider 5. The aforementioned inclined hole 33 is provided on the driving part 31. A groove 34 is provided on the right end face of the connecting part 32. The groove 34 extends inclinedly, and the groove 34 has grooves on both sides ( Figure 6 The section cut out (only one side is shown) is equipped with a binding 35, and a groove 34 extends into the binding 35. (Reference) Figure 8 The second slider 5 is slidably connected within the groove 34, and the second slider 5 also extends into the edging 35, which prevents the second slider 5 from detaching from the groove 34. Figure 6 The top of the slide 34 is also provided with a cover 10, which seals the top of the slide 34 to prevent the second slider 5 from coming out.

[0046] like Figure 6The pad 22 contains a mating post 23, the top of which is wedge-shaped, and the bottom of which abuts against a spring, causing the mating post 23 to move upward. The bottom surface of the first slider 3 also has two mating grooves 36, which are also wedge-shaped. The mating post 23 can be inserted into the mating grooves 36, thereby positioning the first slider 3. The distance between the two mating grooves 36 is the stroke of the first slider 3, which is 34mm in this example.

[0047] like Figure 6 The third slider 6 is fixed to the second slider 5 by a fixing pin 51, and the third slider 6 is slidably disposed within the slide rail 21. The slide rail 21 is located within the mold core 2 and extends obliquely into the mold cavity. Figure 7 Because the slide rail 21 is located inside the mold core 2, the accuracy of the slide rail 21 can be guaranteed. Figure 6 The slide 21 also houses a fourth slider 7, which is connected to a guide pin 71. The third slider 6 has an elongated hole 61, 15mm in length. The guide pin 71 is inserted into the elongated hole 61 and can slide within it. When the third slider 6 moves forward (closer to the mold cavity), the guide pin 71 drives the fourth slider 7 forward. When the third slider 6 retracts (away from the mold cavity), it first slides 15mm, then the guide pin 71 drives the fourth slider 7 backward. The mold core 2 also has a fixing cover 20, which covers the slide 21 and cooperates with it to guide the fourth slider 7 and the third slider 6.

[0048] like Figure 4 The fourth slider 7 has two wedge-shaped (or other shapes) positioning grooves 72 on each side of its travel direction. A positioning block 8 is also provided inside the fixed cover 20. The front end of the positioning block 8 is wedge-shaped, and a spring 9 is provided at its rear end. Under the action of the spring 9, the positioning block 8 is forced into the positioning groove 72. The positioning block 8 and the positioning groove 72 can accurately position the fourth slider 7. This also prevents the fourth slider 7 from moving during the 15mm backward retraction of the third slider 6. This saves the stroke of the fourth slider 7, thereby reducing wear. Both the third slider 6 and the fourth slider 7 are used to mold the product shape.

[0049] like Figure 6 In this example, the size of the second slider 5 is larger than the size of the slide 21, so that the second slider 5 is pressed against the outside of the mold core 2 to limit the stroke of the third slider 6.

[0050] In summary, the high-precision slider in this example, in conjunction with the injection mold, effectively cooperates with the first slider 3, the second slider 5, the third slider 6, and the fourth slider 7, and ensures precision by directly opening the slide 21 in the mold core 2, ultimately improving the positional accuracy of the slider and thus improving product quality.

[0051] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-precision slider-assisted injection mold, characterized in that it include: The first slider (3) includes a driving part (31) and a connecting part (32). The driving part (31) is provided with an inclined hole (33) for the inclined guide post (4) to pass through. The connecting part (32) is provided with an inclined extending groove (34). The groove (34) is provided with a edging (35) on both sides of the extending direction of the groove (34). The groove (34) extends into the edging (35). The second slider (5) is slidably disposed in the groove (34), and a portion of the second slider (5) extends into the edging (35); The third slider (6) is fixed on the second slider (5) and extends into the mold cavity to shape the product. The third slider (6) has an elongated hole (61). The fourth slider (7) is provided with a guide pin (71), which is inserted into the elongated hole (61) so that the fourth slider (7) and the third slider (6) are engaged together. The fourth slider (7) also extends into the mold cavity to shape the product. The mold core (2) is provided with a slide (21) pointing to the mold cavity, and the third slider (6) and the fourth slider (7) are arranged in the slide (21).

2. The high-precision slider and injection mold according to claim 1, characterized in that: The fourth slider (7) has two positioning grooves (72) on its outer side, and also includes a positioning block (8) corresponding to the positioning groove (72). The front end of the positioning block (8) is used to insert into the positioning groove (72).

3. The high-precision slider and injection mold according to claim 2, characterized in that: A spring (9) is provided at the rear end of the positioning block (8), and the spring (9) is used to press the positioning block (8) against the positioning groove (72).

4. The high-precision slider and injection mold according to claim 3, characterized in that: The positioning groove (72) is wedge-shaped, and the front end of the positioning block (8) is also wedge-shaped.

5. The high-precision slider and injection mold according to claim 1, characterized in that: The second slider (5) is larger than the slide rail (21), thereby limiting the stroke of the third slider (6) by pressing the second slider (5) against the outside of the mold core (2).

6. The high-precision slider and injection mold according to claim 1, characterized in that: The length of the elongated hole (61) is 15 mm.

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