Guide pillar and guide sleeve structure for improving positioning precision of mold

Abstract

The utility model discloses a guide post and guide sleeve structure for improving the positioning accuracy of a die. The guide post and guide sleeve structure comprises an upper die holder, a lower die holder, a special-shaped guide post, a sliding sleeve and a guide sleeve, the special-shaped guide column is vertically arranged on the lower die base, the guide sleeve is arranged in the upper die base, the sliding sleeve is located in the guide sleeve, and the sliding sleeve can move in the vertical direction of the special-shaped guide column. The special-shaped guide pillar is of the octagonal structure, the special-shaped guide pillar is provided with the four first straight faces and the four first arc faces, the first arc faces are arranged between the two adjacent first straight faces, and the sleeve holes with the same shape as the cross section of the special-shaped guide pillar are formed in the sliding sleeve and the guide sleeve. The special-shaped guide pillar can provide more supporting faces for the sliding sleeve, rotation, swing or deviation are not prone to occurring, and therefore the moving stability of the guide sleeve is improved. The pin rollers and the balls are arranged on the sliding sleeve, the friction force between the sliding sleeve and the guide sleeve can be reduced, the guide sleeve can move in the vertical direction of the sliding sleeve more smoothly, and therefore the guide precision and stability are improved.

Description

Technical Field

[0001] The utility model relates to the field of mold guide pins and guide sleeves, in particular to a guide pin and guide sleeve structure for improving mold positioning accuracy. Background Art

[0002] Guide pins and guide sleeves are important accessories of the mold. They can accurately guide and position the upper and lower molds during the opening and closing processes of the mold, ensuring the processing accuracy and quality of the product.

[0003] In the prior art, conventional guide pins and guide sleeves are both columnar structures, which are easily worn and offset during use, resulting in displacement when the mold is closed, causing burrs on the product and affecting the production quality of the product; in addition, if the guide pin lacks lubrication during use, the friction between the guide pin and the guide sleeve will increase, thereby affecting the positioning accuracy and service life of the mold.

[0004] Therefore, the prior art has defects and needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a guide column and guide sleeve structure which has a stable structure and is not easy to wear and can improve the positioning accuracy of a mold.

[0006] To achieve this purpose, the utility model adopts the following technical solutions: a guide pin and guide sleeve structure for improving mold positioning accuracy, including an upper mold base, a lower mold base, a special-shaped guide pin, a sliding sleeve and a guide sleeve;

[0007] The special-shaped guide pillar is vertically arranged on the lower die seat, the guide sleeve is arranged in the upper die seat, the sliding sleeve is located in the guide sleeve, and the sliding sleeve can move along the vertical direction of the special-shaped guide pillar;

[0008] The special-shaped guide pillar has an octagonal structure, and has four first straight surfaces and four first curved surfaces, wherein the first curved surface is arranged between two adjacent first straight surfaces;

[0009] The sliding sleeve and the guide sleeve are provided with a sleeve hole having the same cross-sectional shape as the special-shaped guide column;

[0010] The outer side wall of the sliding sleeve has four second straight surfaces and four second curved surfaces, and the second curved surface is arranged between two adjacent second straight surfaces;

[0011] The second straight surface is provided with a plurality of rectangular grooves at intervals along the vertical direction, and rollers are arranged in the rectangular grooves; the second arc surface is provided with a plurality of circular grooves along the vertical direction, and balls are arranged in the circular grooves;

[0012] The roller and the ball are used for rolling connection with the inner wall surface of the guide sleeve.

[0013] By adopting the above technical solution, in the guide pin and guide sleeve structure for improving the positioning accuracy of the mold, the rectangular groove and the circular groove are non-through grooves.

[0014] By adopting the above-mentioned technical solutions, the guide pin and guide sleeve structure for improving the positioning accuracy of the mold further includes an oiling nozzle;

[0015] The oil injection nozzle is arranged at the top of the special-shaped guide column, and the special-shaped guide column has an oil injection channel inside, and the oil injection nozzle is used to inject lubricating grease into the oil injection channel;

[0016] Each of the first straight surface and the first curved surface of the special-shaped guide pillar is respectively provided with at least one oil outlet hole, and the oil outlet hole is communicated with the oil injection channel.

[0017] By adopting the above-mentioned technical solutions, in the guide pin and guide sleeve structure for improving the positioning accuracy of the mold, the outer wall surface of the guide sleeve is a cylindrical structure.

[0018] By adopting the above-mentioned technical solutions, the guide pin and guide sleeve structure for improving the positioning accuracy of the mold further includes a positioning seat, and the cross section of the positioning seat is a T-shaped structure;

[0019] The bottom of the special-shaped guide column is provided with a connecting shaft, the surface of the connecting shaft is provided with an external thread structure, and the positioning seat is provided with an internal thread structure connected to the external thread structure through a thread;

[0020] The lower die seat is provided with a step groove for being sleeved and connected with the positioning seat.

[0021] By adopting the above-mentioned technical solutions, in the guide pin and guide sleeve structure for improving the positioning accuracy of the mold, the surface of the special-shaped guide pin is coated with a molybdenum sulfide coating.

[0022] By adopting the above-mentioned technical solutions, in the guide pin and guide sleeve structure for improving the positioning accuracy of the mold, the guide pin and the guide sleeve are made of alloy steel, and the sliding sleeve is made of copper alloy.

[0023] By adopting the above-mentioned technical solutions, in the guide pin and guide sleeve structure for improving the positioning accuracy of the mold, the length of the guide sleeve is greater than the length of the sliding sleeve.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The special-shaped guide post of the utility model has an octagonal structure, and the special-shaped guide post has four first straight surfaces and four first curved surfaces, and the first curved surface is arranged between two adjacent first straight surfaces, and the sliding sleeve and the guide sleeve are provided with sleeve holes with the same cross-sectional shape as the special-shaped guide post. Such an arrangement enables the special-shaped guide post to provide more supporting surfaces for the sliding sleeve, and is less likely to rotate, swing or deviate, thereby improving the movement stability of the guide sleeve; the rollers and balls arranged on the sliding sleeve can reduce the friction between the sliding sleeve and the guide sleeve, so that the guide sleeve can move more smoothly along the vertical direction of the sliding sleeve, thereby improving the guiding accuracy and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0029] Figure 2 It is a partial structural schematic diagram of the utility model;

[0030] Figure 3 It is a schematic diagram of the partial explosion structure of the utility model;

[0031] Figure 4 It is a top view of the special-shaped guide column of the utility model. DETAILED DESCRIPTION

[0032] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0034] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0035] like Figures 1 to 4 As shown, the embodiment of the utility model provides a guide pin and guide sleeve structure for improving mold positioning accuracy, including an upper mold base 1, a lower mold base 2, a special-shaped guide pin 3, a sliding sleeve 4 and a guide sleeve 5;

[0036] The special-shaped guide pillar 3 is vertically arranged on the lower die base 2, the guide sleeve 5 is arranged in the upper die base 1, the sliding sleeve 4 is located in the guide sleeve 5, and the sliding sleeve 4 can move along the vertical direction of the special-shaped guide pillar 3;

[0037] When the mold completes injection molding or stamping, the upper mold base 1 moves upward under the driving action of external force, the guide sleeve 5 will rise together with the movement of the upper mold base 1, and the sliding sleeve 4 will move accordingly along the direction of the special-shaped guide pillar 3. The special-shaped guide pillar 3 is fixed on the lower mold base 2 as a vertical guiding element, which can provide guidance and support for the vertical movement of the upper mold base 1, so that the mold can be stably positioned in the vertical direction.

[0038] like Figures 2 to 4 As shown, the special-shaped guide pillar 3 is in an octagonal structure, and has four first straight surfaces 31 and four first curved surfaces 32. The first curved surface 32 is arranged between two adjacent first straight surfaces 31. The sliding sleeve 4 and the guide sleeve 5 are provided with a sleeve hole 50 having the same cross-sectional shape as the special-shaped guide pillar 3. Compared with the cylindrical guide pillar, the special-shaped guide pillar 3 in this embodiment can provide more supporting surfaces for the sliding sleeve 4, and is not prone to rotation, swing or deviation, thereby improving the movement stability of the guide sleeve 5;

[0039] The outer side wall of the sliding sleeve 4 has four second straight surfaces 41 and four second curved surfaces 42, and the second curved surface 42 is arranged between two adjacent second straight surfaces 41; the second straight surface 41 is provided with a plurality of rectangular grooves at intervals along the vertical direction, and rollers 411 are arranged in the rectangular grooves; the second curved surface 42 is provided with a plurality of circular grooves along the vertical direction, and balls 421 are arranged in the circular grooves; the rollers 411 and the balls 421 are used for rolling connection with the inner wall surface of the guide sleeve 5.

[0040] In this embodiment, the roller 411 can reduce the friction between the sliding sleeve 4 and the guide sleeve 5, so that the guide sleeve 5 can move more smoothly along the vertical direction of the sliding sleeve 4, thereby improving the guiding accuracy and stability; and the ball 421 can share the load on the guide sleeve 5 during the sliding process, so that the guiding action can be carried out smoothly. In this embodiment, the guide column and the guide sleeve 5 are made of alloy steel, and the sliding sleeve 4 is made of copper alloy.

[0041] like Figure 2 and Figure 3 As shown, further, the rectangular groove and the circular groove are non-through grooves, that is, in this embodiment, the roller 411 and the ball 421 only have rolling contact with the inner wall surface of the guide sleeve 5, while the inner wall surface of the sliding sleeve 4 and the special-shaped guide column 3 are in sliding contact. Such an arrangement can reduce the friction force of the movement of the guide sleeve 5 while improving the matching stability between the sliding sleeve 4 and the special-shaped guide column 3, thereby avoiding the loosening of the sliding sleeve 4.

[0042] like Figure 3 As shown, further, it also includes an oiling nozzle 6, which is arranged on the top of the special-shaped guide column 3. The special-shaped guide column 3 has an oiling channel 30 inside, and the oiling nozzle 6 is used to inject lubricating grease into the oiling channel 30. Each of the first straight surface 31 and the first curved surface 32 of the special-shaped guide column 3 is respectively provided with at least one oil outlet hole 301, and the oil outlet hole 301 is connected to the oiling channel 30.

[0043] The provision of the oiling nozzle 6 makes it convenient for the user to apply lubricating grease to the surface of the special-shaped guide pillar 3 through the oiling nozzle 6, thereby reducing the friction between the sliding sleeve 4 and the special-shaped guide pillar 3. It should be noted that the lubricating grease seeping from the oil outlet hole 301 can be coated on the entire surface of the special-shaped guide pillar 3 under the action of the sliding sleeve 4; in addition, since the oiling nozzle 6 is provided on the top of the special-shaped guide pillar 3, correspondingly, an oil nozzle avoidance hole for avoiding the oiling nozzle 6 is provided on the top of the upper mold base 1 to prevent the oiling nozzle 6 from contacting and colliding with the upper mold base 1.

[0044] like Figure 2 and Figure 3 As shown, further, the outer wall surface of the guide sleeve 5 is in a cylindrical structure. The guide sleeve 5 of the cylindrical structure can be easily installed in the upper die seat 1.

[0045] like Figure 2 and Figure 3 As shown, further, it also includes a positioning seat 7, the cross-section of the positioning seat 7 is a T-shaped structure, the bottom of the special-shaped guide column 3 has a connecting shaft 33, the surface of the connecting shaft 33 is provided with an external thread structure, the positioning seat 7 is provided with an internal thread structure that is threadedly connected to the external thread structure, and the lower mold base 2 is provided with a step groove for being inserted and connected with the positioning seat 7.

[0046] The setting of the positioning seat 7 allows the special-shaped guide column 3 to be accurately aligned with the step groove set on the lower mold base 2 during assembly, so as to improve the assembly efficiency and accuracy; and the special-shaped guide column 3 and the positioning seat 7 are connected by threads, which is convenient for assembly and disassembly, and has high structural stability and is not easy to loosen.

[0047] Furthermore, the surface of the special-shaped guide pillar 3 is coated with a molybdenum sulfide coating. The molybdenum sulfide coating not only has good lubrication performance, can effectively reduce the friction between the special-shaped guide pillar 3 and the sliding sleeve 4, and prolong the service life of the guide pillar, but also has excellent wear resistance, can resist wear and avoid surface damage.

[0048] Furthermore, the length of the guide sleeve 5 is greater than the length of the sliding sleeve 4 .

[0049] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A guide pin and guide sleeve structure for improving mold positioning accuracy, characterized in that: It includes an upper die base, a lower die base, a special-shaped guide pin, a sliding sleeve and a guide sleeve; The special-shaped guide pillar is vertically arranged on the lower die seat, the guide sleeve is arranged in the upper die seat, the sliding sleeve is located in the guide sleeve, and the sliding sleeve can move along the vertical direction of the special-shaped guide pillar; The special-shaped guide pillar has an octagonal structure, and has four first straight surfaces and four first curved surfaces, wherein the first curved surface is arranged between two adjacent first straight surfaces; The sliding sleeve and the guide sleeve are provided with a sleeve hole having the same cross-sectional shape as the special-shaped guide column; The outer side wall of the sliding sleeve has four second straight surfaces and four second curved surfaces, and the second curved surface is arranged between two adjacent second straight surfaces; The second straight surface is provided with a plurality of rectangular grooves at intervals along the vertical direction, and rollers are arranged in the rectangular grooves; the second arc surface is provided with a plurality of circular grooves along the vertical direction, and balls are arranged in the circular grooves; The roller and the ball are used for rolling connection with the inner wall surface of the guide sleeve.

2. The guide pin and guide sleeve structure for improving mold positioning accuracy according to claim 1, characterized in that: The rectangular groove and the circular groove are non-through grooves.

3. The guide pin and guide sleeve structure for improving mold positioning accuracy according to claim 2 is characterized in that: Also includes a grease nipple; The oil injection nozzle is arranged at the top of the special-shaped guide column, and the special-shaped guide column has an oil injection channel inside, and the oil injection nozzle is used to inject lubricating grease into the oil injection channel; Each of the first straight surface and the first curved surface of the special-shaped guide pillar is respectively provided with at least one oil outlet hole, and the oil outlet hole is communicated with the oil injection channel.

4. The guide pin and guide sleeve structure for improving mold positioning accuracy according to claim 1, characterized in that: The outer wall surface of the guide sleeve is in a cylindrical structure.

5. The guide pin and guide sleeve structure for improving mold positioning accuracy according to claim 1, characterized in that: It also includes a positioning seat, the cross section of which is a T-shaped structure; The bottom of the special-shaped guide column is provided with a connecting shaft, the surface of the connecting shaft is provided with an external thread structure, and the positioning seat is provided with an internal thread structure connected to the external thread structure through a thread; The lower die seat is provided with a step groove for being sleeved and connected with the positioning seat.

6. The guide pin and guide sleeve structure for improving mold positioning accuracy according to claim 1, characterized in that: The surface of the special-shaped guide pillar is coated with a molybdenum sulfide coating.

7. The guide pin and guide sleeve structure for improving mold positioning accuracy according to claim 1, characterized in that: The guide pillar and the guide sleeve are both made of alloy steel, and the sliding sleeve is made of copper alloy.

8. The guide pin and guide sleeve structure for improving mold positioning accuracy according to claim 1, characterized in that: The length of the guide sleeve is greater than the length of the sliding sleeve.

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