Die expanding structure
By designing an expansion mold structure that includes an upper template, a cone, and a lower mold assembly, the problems of low material utilization and low production efficiency of forklift wheel groove rings were solved, achieving the effect of simple mold structure, low cost, and stable expansion.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HONGYUAN JINGGONG WHEEL CO LTD
- Filing Date
- 2025-02-25
- Publication Date
- 2026-05-05
AI Technical Summary
In existing technologies, the material utilization rate of forklift wheel groove rings is low, the production efficiency is low, and the mold structure is complex and the investment cost is high, making it difficult to guarantee the stability of the expansion of the steel groove rings.
An expansion mold structure is adopted, including an upper mold plate, a cone and a lower mold assembly. Through the cooperation of a sliding key plate and an expansion slider, the expansion and demolding of the steel channel ring are achieved using a single mold. The structure is simple and reduces the complexity and cost of the mold.
It improves material utilization and production efficiency, reduces mold investment costs, and allows for better control of the expansion dimensions of the steel channel ring, ensuring stability.
Smart Images
Figure CN224195739U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining, and in particular to a mold expansion structure. Background Technology
[0002] Forklift wheels are one-piece wheel structures, with the grooved ring made from steel plates through blanking, rolling, shaping, welding, weld removal, and machining. Due to the special structure of the grooved ring, the material utilization rate is very low, and the production efficiency is also very low. Generally, the molds for steel grooved rings are processed using two sets of molds: one for expansion and the other for contraction. The disadvantages are that the mold structure is complex, the investment cost is high, and it is difficult to ensure the stability of the expansion of the steel grooved ring. Utility Model Content
[0003] To address the technical problems existing in the prior art, this utility model provides a mold expansion structure. The technical solution is as follows:
[0004] An expansion mold structure includes: an upper mold plate, a cone, and a lower mold assembly;
[0005] The cone includes a column end and a cone end. The bottom end of the column end is connected to the cone end. The bottom surface of the upper template is connected to the top surface of the column end. A sliding key plate is sleeved on the outside of the column end. The bottom end of the sliding key plate is connected to the expansion slider via an I-shaped key. A first module is connected to the outer circumference of the bottom of the expansion slider.
[0006] The steel channel ring is placed inside the lower mold assembly, and the upper mold plate is pressed down to expand the steel channel ring through the first module.
[0007] Optionally, the diameter of the top surface of the conical end is larger than the diameter of the bottom surface of the cylindrical end.
[0008] Optionally, the slide key plate is annular, with its inner circumference fitted onto the outer circumference of the column end. The slide key plate supports sliding up and down along the column end. Several rubber blocks that support compression are evenly arranged around the top surface of the slide key plate. When the slide key plate slides to the bottom of the column end, the bottom surface of the groove of the slide key plate abuts against the top surface of the cone end.
[0009] Optionally, a plurality of first T-shaped grooves are evenly formed around the bottom surface of the slide key plate, a groove is formed at the center of the bottom surface of the slide key plate, and a plurality of second T-shaped grooves are evenly formed on the top surface of the expanding slider. The number, position and size of the first T-shaped grooves and the second T-shaped grooves are corresponding and adapted. Each corresponding I-shaped groove formed by connecting the first T-shaped groove and the second T-shaped groove is provided with the I-shaped key adapted to it.
[0010] Optionally, the top surface diameter of the conical end is the maximum diameter of the conical end, and a tension spring is provided on the outer circumference of the top of the expansion slider, the tension spring causing the inner wall of the expansion slider to contact the outer wall of the conical end.
[0011] Optionally, the lower mold assembly includes a lower mold base plate, an annular lower mold ring is mounted on the lower mold base plate, a through groove is provided at the center of the lower mold base plate, an ejector rod is slidably mounted in the through groove, the top end of the ejector rod passes through the through groove, the top end of the ejector rod is fitted with an ejector plate, the ejector plate is located inside the lower mold ring, and the diameter of the ejector plate is adapted to the inner diameter of the lower mold ring.
[0012] Optionally, the bottom end of the steel channel ring is placed on the top surface of the ejector plate, and when the ejector rod moves upward, it supports and drives the ejector plate to move upward, causing the steel channel ring to disengage from the lower mold ring.
[0013] Optionally, the outer wall of the first module is adapted to the shape and size of the inner wall of the steel channel ring. When the first module expands the steel channel ring, the outer wall of the first module abuts against the inner wall of the steel channel ring. At this time, the bottom surface of the first module and the bottom surface of the expansion slider are placed on the top surface of the ejector plate. When the outer wall of the steel channel ring abuts against the inner wall of the lower mold ring, the expansion limit is reached and the expansion is completed.
[0014] Optionally, the conical end is an inverted frustum shape. The beneficial effects of the technical solution provided by this embodiment of the invention include at least the following:
[0015] The technical solution of this utility model has a simple structure and uses a set of molds to complete the finishing of the steel channel ring. Therefore, the investment cost is low and the material utilization rate and production efficiency can be improved. Since the lower mold ring is designed to abut against the outer wall of the steel channel ring, the expansion dimension of the steel channel ring can be better controlled. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of a mold expansion structure provided by the present invention.
[0018] Figure label:
[0019] 1. First screw; 2. Upper template; 3. Cone; 4. Second screw; 5. Rubber block; 6. Slide key plate; 7. I-beam key; 8. Expanding slider; 9. Tension spring; 10. Third screw; 11. First module; 12. Lower mold ring; 13. Lower mold base plate; 14. Fourth screw; 15. Ejector plate; 16. Ejector rod; 17. Fifth screw; 18. Pressure cap. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0021] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.
[0022] It should be noted that the terms "upper", "lower", "left", "right", "front", and "back" used in this utility model are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0023] like Figure 1As shown, a mold expansion structure is provided, including an upper mold plate 2, a cone 3, and a lower mold assembly. The cone 3 includes a cylindrical end and a conical end. The conical end is an inverted frustum structure, meaning the diameter of the base of the frustum is smaller than the diameter of the top surface, and the diameter of the cylindrical end is smaller than the diameter of the top surface of the conical end, forming a stepped structure at the connection between the cylindrical end and the conical end. The bottom end of the cylindrical end is coaxially connected to the top end of the conical end. The bottom surface of the upper mold plate 2 is connected to the top surface of the cylindrical end by a first screw 1. A sliding key plate 6 is slidably fitted onto the end of the column. The sliding key plate 6 is annular, with its inner circumference slidingly fitted onto the outer circumference of the column end. The sliding key plate 6 can slide up and down along the column end. Several compression-supporting rubber blocks 5 are evenly arranged around the top surface of the sliding key plate 6. A groove is provided in the center of the bottom surface of the sliding key plate. When the sliding key plate 6 slides to the bottom of the column end, the bottom surface of the groove of the sliding key plate 6 abuts against the top surface of the cone end. At this point, the sliding key plate 6 reaches its limit of downward movement. The rubber blocks 5 make the sliding key plate 6 more stable and prevent angular displacement. The rubber blocks 5 are connected to the sliding key plate 6 by a second screw 4.
[0024] An expanding slider 8 is slidably connected to the outer surface of the conical end. Several first T-slots are evenly formed around the bottom surface of the slide key plate 6, and several second T-slots are evenly formed on the top surface of the expanding slider 8. The number, position, and size of the first and second T-slots are corresponding and compatible. Each corresponding I-shaped groove formed by the connection of the first and second T-slots is provided with a matching I-shaped key 7. The first module 11 is fixed to the outer circumference of the bottom of the expanding slider 8 by a third screw 10. The top surface diameter of the conical end is the maximum diameter of the conical end. When the conical end is inserted into the inside of the expanding slider 8, the expanding slider 8 gradually expands as the conical end is slowly inserted into the inside of the expanding slider 8 because the conical end has a taper and the top surface diameter of the conical end is the largest. When the outer wall of the steel channel ring abuts against the inner wall of the lower mold ring 12, the expansion limit is reached, and the expansion is completed. A tension spring 9 is provided on the outer circumference of the top of the expansion slider 8. When the conical end is inserted into the expansion module 8, the inner wall of the expansion module 8 is always in contact with the outer wall of the conical end, so that the moving conical end can provide a pushing force to the expansion slider 8 to expand the expansion slider 8.
[0025] The lower mold assembly includes a lower mold base plate 13. An annular lower mold ring 12 is installed on the lower mold base plate 13 by a fourth screw 14. A through groove is provided in the center of the lower mold base plate 13. A push rod 16 is slidably installed in the through groove. The top end of the push rod 16 passes through the through groove. The upward-moving push rod 16 can slide in the through groove. An ejector plate 15 is sleeved on the top end of the push rod 16. A pressure cap 18 is installed on the top surface of the ejector plate by a fifth screw 17. The pressure cap 18 is used to fix the ejector plate 15. The ejector plate 15 is located inside the lower mold ring 12, and the diameter of the ejector plate 15 is adapted to the inner diameter of the lower mold ring 12, that is, the outer wall of the ejector plate 15 is in contact with the inner wall of the lower mold ring 12.
[0026] The bottom end of the steel channel ring to be expanded rests on the top surface of the ejector plate 15. When demolding is required after expansion, the ejector rod 16 moves upward, causing the ejector plate 15 to move upward, which in turn moves the steel channel ring upward, thus separating it from the lower mold ring 12, facilitating removal of the steel channel ring. The outer wall of the first module 11 is adapted to the shape and size of the inner wall of the steel channel ring. When the first module 11 expands the steel channel ring, the outer wall of the first module 11 abuts against the inner wall of the steel channel ring. At this time, the bottom surface of the first module 11 and the bottom surface of the expansion slider 8 rest on the top surface of the ejector plate 15. The lower pressing upper mold plate 2 expands the steel channel ring through the first module 11.
[0027] The working process of this utility model is as follows:
[0028] Lift the upper template 2, which drives the cone 3 to move upward, and through the sliding key plate 6, drives the expansion slider 8 and the first module 11 to move upward, so that the expansion slider 8 and the first module 11 are away from the lower mold assembly; place the steel channel ring on the ejector plate 15, and fix the lower mold ring 12 to make the expansion dimension of the steel channel ring more standardized. As the upper template 2 is pressed down, due to gravity, the sliding key plate 6 slides to the bottom of the column end, causing the expansion slider 8 and the first module 11 to be located below the cone 3. Thus, during the descent of the upper template 2, the expansion slider 8, carrying the first module 11, contacts the ejector plate 15 first. When the expansion slider 8 and the first module 11 are placed on the ejector plate 15, the first module 11 and the expansion slider 8 are located inside the steel channel ring, and the outer wall of the first module 11 abuts against the inner wall of the steel channel ring. The upper template 2 continues to move down, causing the cone 3 to move down. During the continuous downward movement of the cone 3, the cone end provides a pushing force to the expansion slider 8 due to its taper, causing the expansion slider 8 to drive the first module 11 to expand, thereby causing the steel channel ring to expand. When the outer wall of the steel channel ring abuts against the lower mold ring 12, the expansion limit is reached, and the expansion is completed. Lifting the upper mold plate 2 causes the sliding key plate 6 to move downward relative to the column end under the elastic force of the rubber block 5. The expanding slider 8 contracts under the action of the tension spring 9, causing the expanding slider 8 and the first module 11 to disassemble. The upper mold plate 2 continues to move the cone 3. When the top surface of the cone end contacts the bottom surface of the groove in the sliding key plate 6 during its upward movement, the upper mold plate 2, through the cone 3, moves the sliding key plate 6 upward, thereby moving the expanding slider 8 and the first module 11 upward. The upper mold plate 2 then moves the cone 3, the expanding slider 8, and the first module 11 upward, away from the lower mold assembly. The control ejector rod 16 moves upward, causing the ejector plate 15 to move upward, thus moving the steel groove ring upward and separating it from the lower mold ring 12, facilitating the removal of the steel groove ring.
[0029] This solution has a simple structure and uses a set of molds to complete the finishing of the steel channel ring. Therefore, the investment cost is low and the material utilization rate and production efficiency can be improved. Because the lower mold ring is designed to abut against the outer wall of the steel channel ring, the expansion dimension of the steel channel ring can be better controlled.
[0030] The following points need to be explained:
[0031] (1) The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment. Other structures can refer to the general design.
[0032] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present invention, i.e., these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.
[0033] (3) Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.
[0034] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. The protection scope of this utility model shall be determined by the protection scope of the claims.
Claims
1. A mold expansion structure, characterized in that, include: Upper template, cone, and lower mold assembly; The cone includes a column end and a cone end. The bottom end of the column end is connected to the cone end. The bottom surface of the upper template is connected to the top surface of the column end. A sliding key plate is sleeved on the outer side of the column end. The bottom end of the sliding key plate is connected to an expansion slider via an I-shaped key. A first module is connected to the outer circumference of the bottom of the expansion slider. The steel channel ring is placed inside the lower mold assembly, and the upper mold plate is pressed down to expand the steel channel ring through the first module; The diameter of the top surface of the conical end is larger than the diameter of the bottom surface of the cylindrical end; The slide key plate is circular, and the inner circumference of the slide key plate is fitted on the outer circumference of the column end. The slide key plate supports sliding up and down along the column end. Several rubber blocks that support compression are evenly arranged around the top surface of the slide key plate. When the slide key plate slides to the bottom of the column end, the bottom surface of the groove of the slide key plate abuts against the top surface of the cone end. A plurality of first T-shaped grooves are evenly formed around the bottom surface of the slide key plate, and a groove is formed in the center of the bottom surface of the slide key plate. A plurality of second T-shaped grooves are evenly formed on the top surface of the expanding slider. The number, position and size of the first T-shaped grooves and the second T-shaped grooves are corresponding and adapted. Each corresponding I-shaped groove formed by connecting the first T-shaped groove and the second T-shaped groove is provided with the I-shaped key adapted to it.
2. The mold expansion structure according to claim 1, characterized in that, The top surface diameter of the cone end is the maximum diameter of the cone end. A tension spring is provided on the outer circumference of the top of the expansion slider, and the tension spring causes the inner wall of the expansion slider to contact the outer wall of the cone end.
3. The mold expansion structure according to claim 1, characterized in that, The lower mold assembly includes a lower mold base plate, on which an annular lower mold ring is mounted. A through groove is provided in the center of the lower mold base plate, and a push rod is slidably installed in the through groove. The top end of the push rod passes through the through groove, and an ejector plate is sleeved on the top end of the push rod. The ejector plate is located inside the lower mold ring, and the diameter of the ejector plate is adapted to the inner diameter of the lower mold ring.
4. The mold expansion structure according to claim 3, characterized in that, The bottom end of the steel channel ring is placed on the top surface of the ejector plate. When the ejector rod moves upward, it supports and drives the ejector plate to move upward, causing the steel channel ring to detach from the lower mold ring.
5. The mold expansion structure according to claim 1, characterized in that, The conical end is an inverted frustum shape.