Guiding and positioning structure and mold

Abstract

The utility model relates to the technical field of molds, and discloses a guiding and positioning structure and a mold, the guiding and positioning structure comprises a guide pillar structure, the guide pillar structure comprises a central pillar and a bushing, the bushing is provided with a mounting hole extending along the axis of the bushing, the central pillar is matched with the mounting hole and penetrates through the mounting hole, and the end part of the bushing is provided with a conical part; the guide sleeve structure comprises a guide sleeve arranged opposite to the lining, the guide sleeve is provided with a guide hole formed in the axial direction of the guide sleeve, the guide hole is matched with the central column, one end, facing the guide column structure, of the guide hole is provided with a conical hole, the conical hole is communicated with the guide hole, and the conical hole is matched with the conical part. The maintenance cost is high, and the productivity is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a guiding and positioning structure and a mold. Background Art

[0002] Molds are tools used in industry to make molded objects. They are widely used in molding processes such as punching, die forging, pressure casting, injection molding, and compression molding. Molds generally include a movable mold and a fixed mold. The movable mold and the fixed mold are closed to form the raw material between the movable mold and the fixed mold. The mold is taken out when the movable mold and the fixed mold are separated. When the movable mold and the fixed mold are in relative motion, the guidance and positioning of the moving structure are generally achieved through the cooperation of the guide pin and the guide sleeve. Affected by the mold molding accuracy requirements, the cooperation accuracy between the guide pin and the guide sleeve has higher requirements.

[0003] In the related art, if the gap between the guide pin and the guide sleeve is too large, the mold closing accuracy cannot be guaranteed. Therefore, the guide pin and the guide sleeve on the mold generally have a smaller gap for transition fit. However, during long-term use, wear will inevitably occur between the guide pin and the guide sleeve, resulting in an increase in the gap, which in turn leads to a decrease in fitting accuracy and affects product quality. Therefore, it is necessary to frequently replace the guide pin and the guide sleeve in a timely manner, which has high maintenance costs and seriously affects the mold production capacity. Utility Model Content

[0004] In view of this, the utility model provides a guiding and positioning structure and a mold to solve the problem of frequent replacement of guide pins and guide sleeves, high maintenance costs, and impact on production capacity.

[0005] In the first aspect, the utility model provides a guiding and positioning structure, comprising: a guide column structure, comprising a center column and a bushing, the bushing is provided with a mounting hole extending along the axis of the bushing, the center column is adapted to and passes through the mounting hole, and the end of the bushing is provided with a tapered portion; a guide sleeve structure, comprising a guide sleeve arranged opposite to the bushing, the guide sleeve having a guide hole arranged along its own axial direction, the guide hole is adapted to the center column, and the guide hole is provided with a tapered hole at one end of the guide column structure, the tapered hole is connected to the guide hole, and the tapered hole is adapted to the tapered portion.

[0006] Beneficial effects: By setting a tapered portion at the end of the bushing and setting a corresponding tapered hole in the guide sleeve, when the mold is closed, the cooperation between the tapered portion and the tapered hole, and the cooperation between the center column and the guide hole together provide precise guidance and positioning for the mold closing action, ensuring production accuracy. When the guide structure works for a long time, wear may occur between the center column and the guide hole, but with the assistance of the cooperation between the tapered portion and the tapered hole, the guidance and positioning of the mold can still be accurately achieved, effectively extending the service life of the guide positioning structure. In addition, since the center column is detachably connected to the bushing through the cooperation with the mounting hole, and after long-term use, the wear between the center column and the guide hole will be significantly greater than the wear between the tapered portion and the tapered hole. Therefore, when replacing, only the center column can be disassembled and replaced according to the actual wear situation, without replacing the bushing, thereby reducing maintenance costs.

[0007] In an optional embodiment, the conical portion has a first positioning surface at one end facing the guide sleeve, and the conical hole has a second positioning surface at one end facing the conical portion, and the second positioning surface is suitable for abutting against the first positioning surface to achieve axial limitation of the conical portion.

[0008] Beneficial effect: Through the abutment between the first positioning surface and the second positioning surface, the axial movement of the guide column structure is limited, thereby limiting the movement distance of the mold, reducing the possibility of mold collision accidents, and improving the reliability of the structure.

[0009] In an optional embodiment, a hole wall at a point where the tapered hole communicates with the guide hole has a chamfer.

[0010] Beneficial effect: By setting a chamfer on the hole wall at the connection point between the tapered hole and the guide hole, the center column can avoid being stuck or colliding with the hole wall of the guide hole when the center column passes through the tapered hole and extends into the guide hole, thereby improving the smoothness of the structure movement.

[0011] In an optional embodiment, the end of the central column facing the guide sleeve is rounded.

[0012] Beneficial effect: By providing a chamfer at the end of the center column, the possibility of jamming and collision when the center column extends from the tapered hole into the guide hole is further reduced, thereby improving the smoothness of the structure's movement.

[0013] In an optional embodiment, a plurality of annular grooves are provided on the circumferential side wall of the central column, and the plurality of annular grooves are spaced apart along the axial direction of the central column.

[0014] Beneficial effects: By setting a plurality of annular grooves, it is convenient to inject lubricating oil or other lubricating media into the annular grooves, reduce the resistance during installation and removal of the center column and the bushing, and reduce the difficulty of assembly.

[0015] In an optional embodiment, a first oil filling hole is provided on the center column and extends along the axis of the center column and extends to one of the end faces, and a second oil filling hole connected to the annular groove is provided on the center column at each annular groove, and each of the second oil filling holes is connected to the first oil filling hole.

[0016] Beneficial effect: By setting the oil filling hole, the lubricating medium can be injected into the first oil filling hole during the installation and disassembly process, and the lubricating medium can be directly injected into each ring groove position, so as to more accurately lubricate the center column and the bushing.

[0017] In an optional embodiment, the length of the tapered portion is greater than or equal to the depth of the tapered hole.

[0018] Beneficial effect: Since the length of the tapered portion is greater than the depth of the tapered hole, while ensuring the movement accuracy through the cooperation between the tapered portion and the tapered hole, the contact area between the tapered portion and the tapered hole is reduced, the movement resistance is reduced and the wear is further reduced.

[0019] In the second aspect, the utility model also provides a mold, including: a first module group; a second module group, arranged opposite to the first module group; the above-mentioned guiding and positioning structure, the guide column structure is installed on the first module group, and the guide sleeve structure is installed on the second module group.

[0020] Beneficial effect: Since the above-mentioned guiding and positioning structure has good matching accuracy and service life, the mold adopts the above-mentioned guiding and positioning structure, which can effectively reduce the need to replace the guiding and positioning structure due to wear, reduce the number of downtimes, improve production efficiency and reduce maintenance costs.

[0021] In an optional embodiment, the end of the center column away from the guide sleeve has a first mounting portion with a diameter larger than the mounting hole, and the end of the bushing away from the guide sleeve has a second mounting portion with a diameter larger than the first mounting portion, and the first mounting portion abuts against the second mounting portion.

[0022] Beneficial effect: By setting the first mounting portion, when the center column and the bushing are assembled, the first mounting portion is abutted and pressed against the end of the bushing, so that the bushing and the center column are relatively positioned axially. When the guide column structure is installed on the mold base, the second mounting portion is pressed against the mold base, so that the mold base and the bushing are relatively positioned axially, thereby realizing the positioning of the mold base and the center column.

[0023] In an optional embodiment, the first die set includes a die base and a fixing plate, the die base is provided with an assembly hole adapted to the bushing, the fixing plate is fixedly connected to the die base, and the fixing plate is used to press against the first mounting portion.

[0024] Beneficial effect: The second mounting portion is positioned through the mold base, thereby realizing the relative positioning of the mold base and the guide column structure as a whole, and then the fixed plate is fixedly connected to the mold base, and the fixed plate is pressed against the first mounting portion, thereby realizing the assembly of the entire guide column structure and the mold base. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a schematic diagram of the overall structure of a guide and positioning structure according to an embodiment of the utility model;

[0027] Figure 2 A schematic cross-sectional structure diagram of a guide and positioning structure according to an embodiment of the utility model;

[0028] Figure 3 for Figure 2 A partial enlarged schematic diagram of part A;

[0029] Figure 4 for Figure 2 A partial enlarged schematic diagram of part B;

[0030] Figure 5 It is a schematic cross-sectional structure diagram of a guide post structure and a guide sleeve structure of a guide positioning structure in an embodiment of the utility model in a separated state;

[0031] Figure 6 A guiding and positioning structure of an embodiment of the utility model is used to embody a cross-sectional structural schematic diagram of a first oil injection hole and a second oil injection hole.

[0032] Description of reference numerals:

[0033] 100. Guide column structure; 101. Center column; 1011. Chamfer; 1012. Ring groove; 1013. First oil filling hole; 1014. Second oil filling hole; 1015; First mounting portion; 102. Bushing; 1021. Mounting hole; 1022. Tapered portion; 1023. First positioning surface; 1024. Second mounting portion; 200. Guide sleeve structure; 201. Guide sleeve; 2011. Guide hole; 2012. Second positioning surface; 2013. Chamfer; 2014. Tapered hole. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0035] A mold generally has at least one movable mold and one fixed mold. Some special molds may include multiple fixed molds and multiple movable molds. When the movable mold and the fixed mold are combined, the mold cavities on the movable mold and the fixed mold together constitute the cavity of the entire mold, thereby forming the processed raw materials.

[0036] Since the accuracy of the product depends on the dimensional accuracy of the cavity, in order to ensure the accuracy of the product, a guiding and positioning structure needs to be set between the movable mold and the fixed mold to guide and limit the mold closing action of the movable mold and the fixed mold. In the relevant technology, the guiding and positioning structures are generally guide pins and guide sleeves. However, the guide pins and guide sleeves will inevitably wear out under the long-term operation of the mold, resulting in a decrease in the matching accuracy between the movable mold and the fixed mold, which in turn affects the dimensional accuracy of the product. The guide pins and guide sleeves need to be replaced in a timely manner. However, when replacing the guide pins and guide sleeves for some molds working under medium and high temperature conditions, it is often necessary to wait for the mold to cool down, and reheat the mold after the replacement is completed, resulting in the replacement and maintenance work taking several hours or even dozens of hours, which seriously affects the equipment production capacity.

[0037] The present application provides a guiding and positioning structure, which can delay the wear of the guide column and the guide sleeve, greatly reduce the replacement frequency of the guiding and positioning structure, and improve the equipment production capacity.

[0038] Combine the following Figures 1 to 6 , describing an embodiment of the utility model.

[0039] According to an embodiment of the present invention, on the one hand, a guiding and positioning structure is provided, see Figure 1 and Figure 2, including: a guide column structure 100 and a guide sleeve structure 200, wherein the guide column structure 100 includes a center column 101 and a bushing 102, the bushing 102 is provided with a mounting hole 1021 extending along the axis of the bushing 102, the center column 101 is adapted to the mounting hole 1021 and passes through the mounting hole 1021, and a tapered portion 1022 is provided at the end of the bushing 102; the guide sleeve structure 200 includes a guide sleeve 201 arranged opposite to the bushing 102, the guide sleeve 201 has a guide hole 2011 arranged along its own axial direction, the guide hole 2011 is adapted to the center column 101, and a tapered hole 2014 is provided at one end of the guide hole 2011 facing the guide column structure 100, the tapered hole 2014 is connected to the guide hole 2011, and the tapered hole 2014 is adapted to the tapered portion 1022.

[0040] In this embodiment, by providing a tapered portion 1022 at the end of the bushing 102 and providing a corresponding tapered hole 2014 in the guide sleeve 201, when the mold is closed, the cooperation between the tapered portion 1022 and the tapered hole 2014, and the cooperation between the center column 101 and the guide hole 2011 together provide accurate guidance and positioning for the mold closing action, thereby ensuring production accuracy. When the guide structure works for a long time, wear may occur between the center column 101 and the guide hole 2011, but with the assistance of the cooperation between the tapered portion 1022 and the tapered hole 2014, the guidance and positioning of the mold can still be accurately achieved, effectively extending the service life of the guide and positioning structure. In addition, since the center column 101 is detachably connected to the bushing 102 through cooperation with the mounting hole 1021, and after long-term use, the wear between the center column 101 and the guide hole 2011 will be significantly greater than the wear between the tapered portion 1022 and the tapered hole 2014. Therefore, when replacing, only the center column 101 can be disassembled and replaced according to the actual wear conditions, without replacing the bushing 102, thereby reducing maintenance costs.

[0041] It should be noted that, in order to ensure accuracy, the center column 101 and the guide hole 2011 are used to have a transition fit that allows for relative axial movement. During the process of mold opening and closing, the center column 101 and the wall of the guide hole 2011 rub against each other and are accompanied by wear. However, the center column 101 and the wall of the guide hole 2011 are generally in frontal contact, and there is less mutual friction. Therefore, the degree of wear between the tapered portion 1022 and the tapered hole 2014 is significantly less than the degree of wear between the center column 101 and the guide hole 2011.

[0042] Specifically, the tapered portion 1022 is integrally provided on the bushing 102, and the mounting hole 1021 passes through the tapered portion 1022. The diameter of the tapered portion 1022 is uniformly reduced to a value greater than the diameter of the mounting hole 1021 in the direction away from the bushing 102, so that a plane is formed at the end of the tapered portion 1022. In some embodiments not shown, the diameter of the tapered portion 1022 can be uniformly reduced to the same as the diameter of the mounting hole 1021, that is, the thickness of the bushing 102 is gradually reduced to zero at this point.

[0043] In addition, specifically, the bushing 102 and the center column 101 are assembled using a transition fit or interference fit that cannot move relative to each other in the axial direction. When assembling the guiding and positioning mechanism of the mold, the bushing 102 and the center column 101 are first assembled, and then the guide column structure 100 and the guide sleeve structure 200 are respectively assembled on the movable mold or the fixed mold of the mold.

[0044] See also Figures 2 to 5 In one embodiment, the end of the tapered portion 1022 facing the guide sleeve 201 has a first positioning surface 1023, and the end of the tapered hole 2014 facing the tapered portion 1022 has a second positioning surface 2012, and the second positioning surface 2012 is suitable for abutting against the first positioning surface 1023 to achieve axial limitation of the tapered portion 1022.

[0045] Specifically, this embodiment does not limit the specific forms of the first positioning surface 1023 and the second positioning surface 2012. The first positioning surface 1023 and the second positioning surface 2012 can be planes perpendicular to the axis of the guide sleeve 201. In some embodiments not shown, the first positioning surface 1023 and the second positioning surface 2012 can also be surfaces inclined relative to the axis of the guide sleeve 201, as long as the abutment between the first positioning surface 1023 and the second positioning surface 2012 can limit the guide sleeve 201 and the tapered portion 1022.

[0046] In this embodiment, the abutment between the first positioning surface 1023 and the second positioning surface 2012 limits the axial movement of the guide column structure 100, thereby limiting the movement distance of the mold, reducing the possibility of mold collision accidents, and improving the reliability of the structure.

[0047] In one embodiment, a chamfer 2013 is formed on the hole wall where the tapered hole 2014 communicates with the guide hole 2011 .

[0048] In this embodiment, by setting a chamfer 2013 on the hole wall at the connection point between the tapered hole 2014 and the guide hole 2011, when the center column 101 passes through the tapered hole 2014 and extends into the guide hole 2011, it is avoided that the center column 101 and the hole wall of the guide hole 2011 get stuck or collided, thereby improving the smoothness of the structure movement.

[0049] In one embodiment, the end of the central column 101 facing the guide sleeve 201 has a rounded shape 1011 .

[0050] In this embodiment, by providing a chamfer 1011 at the end of the center column 101, the possibility of jamming and collision when the center column 101 extends from the tapered hole 2014 into the guide hole 2011 is further reduced, thereby improving the smoothness of the structural movement.

[0051] In one embodiment, a plurality of annular grooves 1012 are disposed on the circumferential side wall of the central column 101 , and the plurality of annular grooves 1012 are spaced apart along the axial direction of the central column 101 .

[0052] In this embodiment, by providing a plurality of annular grooves 1012 , it is convenient to inject lubricating oil or other lubricating media into the annular grooves 1012 , thereby reducing the resistance during installation and removal of the center column 101 and the bushing 102 and lowering the difficulty of assembly.

[0053] See also Figure 2 and Figure 6 In one embodiment, a first oil filling hole 1013 is provided on the center column 101 and extends along the axis of the center column 101 and extends to one of the end faces. A second oil filling hole 1014 connected to the annular groove 1012 is provided on each annular groove 1012 of the center column 101, and each second oil filling hole 1014 is connected to the first oil filling hole 1013.

[0054] Specifically, the first oil filling hole 1013 extends to an end of the center column 101 away from the guide sleeve 201 .

[0055] In this embodiment, by providing an oil filling hole, a lubricating medium can be injected into the first oil filling hole 1013 during the installation and disassembly process, and the lubricating medium can be directly injected into each annular groove 1012 position, thereby more accurately lubricating the center column 101 and the bushing 102.

[0056] In one embodiment, the length of the tapered portion 1022 is greater than or equal to the depth of the tapered hole 2014 .

[0057] In this embodiment, since the length of the tapered portion 1022 is greater than the depth of the tapered hole 2014, while ensuring the movement accuracy through the cooperation between the tapered portion 1022 and the tapered hole 2014, the contact area between the tapered portion 1022 and the tapered hole 2014 is reduced, thereby reducing the movement resistance and further reducing wear.

[0058] According to an embodiment of the utility model, on the other hand, a mold is also provided, a first module group; a second module group is arranged opposite to the first module group; the above-mentioned guiding and positioning structure, the guide column structure 100 is installed in the first module group, and the guide sleeve structure 200 is installed in the second module group.

[0059] It should be noted that this embodiment does not limit the specific form and function of the first module and the second module. In the mold, the first module can be used as a movable module and the second module can be used as a fixed module, or the first module can be used as a fixed module and the second module can be used as a movable module.

[0060] In this embodiment, since the above-mentioned guiding and positioning structure has good fitting accuracy and service life, the mold adopts the above-mentioned guiding and positioning structure, which can effectively reduce the need to replace the guiding and positioning structure due to wear, reduce the number of downtimes, improve production efficiency and reduce maintenance costs.

[0061] In one embodiment, the end of the center column 101 away from the guide sleeve 201 has a first mounting portion 1015 with a diameter larger than the mounting hole 1021, and the end of the bushing 102 away from the guide sleeve 201 has a second mounting portion 1024 with a diameter larger than the first mounting portion 1015, and the first mounting portion 1015 abuts against the second mounting portion 1024.

[0062] In this embodiment, by providing the first mounting portion 1015, when the center column 101 and the bushing 102 are assembled, the first mounting portion 1015 is abutted and pressed against the end of the bushing 102, so that the bushing 102 and the center column 101 are axially relatively positioned. When the guide column structure 100 is installed on the mold base, the second mounting portion 1024 is pressed against the mold base, thereby achieving axial relative positioning of the mold base and the bushing 102, and further achieving positioning of the mold base and the center column 101.

[0063] In one embodiment, the first mold assembly includes a mold base (not shown in the figure) and a fixed plate (not shown in the figure), the mold base is provided with an assembly hole adapted to the bushing 102, the fixed plate is fixedly connected to the mold base, and the fixed plate is used to tighten the first mounting portion 1015.

[0064] In this embodiment, the second mounting portion 1024 is positioned through the mold base, thereby achieving relative positioning of the mold base and the guide column structure 100 as a whole, and then the fixed plate is fixedly connected to the mold base, and the fixed plate is pressed against the first mounting portion 1015, thereby achieving assembly of the entire guide column structure 100 and the mold base.

[0065] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A guiding and positioning structure, characterized in that: include: A guide column structure (100) comprises a central column (101) and a bushing (102), wherein the bushing (102) is provided with a mounting hole (1021) extending along the axis of the bushing (102), the central column (101) is adapted to the mounting hole (1021) and passes through the mounting hole (1021), and the end of the bushing (102) is provided with a tapered portion (1022); The guide sleeve structure (200) comprises a guide sleeve (201) arranged opposite to the bushing (102), the guide sleeve (201) having a guide hole (2011) arranged along its own axial direction, the guide hole (2011) being adapted to the center column (101), a conical hole (2014) being provided at one end of the guide hole (2011) facing the guide column structure (100), the conical hole (2014) being connected to the guide hole (2011), and the conical hole (2014) being adapted to the conical portion (1022).

2. The guiding and positioning structure according to claim 1, characterized in that: The conical portion (1022) has a first positioning surface (1023) at one end facing the guide sleeve (201), and the conical hole (2014) has a second positioning surface (2012) at one end facing the conical portion (1022), and the second positioning surface (2012) is suitable for abutting against the first positioning surface (1023) to achieve axial limitation of the conical portion (1022).

3. The guiding and positioning structure according to claim 2, characterized in that: A chamfer (2013) is provided on the hole wall where the tapered hole (2014) is connected to the guide hole (2011).

4. The guiding and positioning structure according to claim 3, characterized in that: The end of the central column (101) facing the guide sleeve (201) has a rounded shape (1011).

5. The guiding and positioning structure according to claim 2, characterized in that: A plurality of annular grooves (1012) are provided on the circumferential side wall of the central column (101), and the plurality of annular grooves (1012) are distributed at intervals along the axial direction of the central column (101).

6. The guiding and positioning structure according to claim 5, characterized in that: The center column (101) is provided with a first oil injection hole (1013) extending axially along the center column (101) and extending to one of the end faces; the center column (101) is provided with a second oil injection hole (1014) connected to the annular groove (1012) at each annular groove (1012); each of the second oil injection holes (1014) is connected to the first oil injection hole (1013).

7. The guiding and positioning structure according to claim 1, characterized in that: The length of the tapered portion (1022) is greater than or equal to the depth of the tapered hole (2014).

8. A mold, characterized in that: include: First module; A second module, arranged opposite to the first module; In the guiding and positioning structure described in any one of claims 1 to 7, the guide column structure (100) is installed on the first module, and the guide sleeve structure (200) is installed on the second module.

9. The mold according to claim 8, characterized in that: The end of the center column (101) away from the guide sleeve (201) has a first mounting portion (1015) with a diameter larger than the mounting hole (1021), and the end of the bushing (102) away from the guide sleeve (201) has a second mounting portion (1024) with a diameter larger than the first mounting portion (1015), and the first mounting portion (1015) abuts against the second mounting portion (1024).

10. The mold according to claim 9, characterized in that: The first die set comprises a die base and a fixing plate, the die base is provided with an assembly hole adapted to the bushing (102), the fixing plate is fixedly connected to the die base, and the fixing plate is used to press against the first mounting portion (1015).

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