Die-casting die facilitating subsequent flash removal
By designing a beveled surface through which the protruding ribs are formed in the die-casting mold, the problem of difficult burr removal is solved, achieving convenient burr removal and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN WENYU IND CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-06-02
AI Technical Summary
Existing die-casting molds have a vertical cut-through design at the cut-through point between the upper and lower molds, which causes the burr direction to be in the same direction as the ribs of the die-cast product, resulting in difficult, time-consuming and costly burr removal.
The upper end of the rib is placed in the forming groove after the upper and lower molds are closed. The surface of the rib includes a left and right inclined surface that tapers. The top surface is parallel to the parting surface. The wall of the forming groove includes the bottom surface of the groove facing each other, the left side inclined surface and the right side inclined surface. The inclined surface design makes the direction of the flash different from the position of the rib on the die-cast workpiece, and the inclined surface is used to penetrate.
It facilitates the removal of burrs, saving time and reducing costs.
Smart Images
Figure CN224309583U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a die casting mold, and more particularly to a die casting mold that facilitates subsequent burr removal. Background Technology
[0002] In existing die-casting molds, to extend the mold's service life and reduce processing costs, a vertical cut-through design is generally used at the point where the upper and lower molds meet. However, after a certain number of products are die-cast, the fit precision between the upper and lower molds at the cut-through point decreases, resulting in burrs appearing on subsequent die-cast products. Since burrs on die-cast products affect quality and can cause damage to users, they need to be removed in subsequent processes.
[0003] Because existing die-casting molds have a vertical collision design at the collision point between the upper and lower molds, and the direction of the burrs that appear at the collision point between the upper and lower molds is the same as the direction of the ribs of the die-cast product, the subsequent removal of burrs from the die-cast product is difficult, time-consuming, and costly.
[0004] Therefore, there is an urgent need for a die-casting mold that facilitates subsequent burr removal to overcome one or more of the above-mentioned defects. Utility Model Content
[0005] The purpose of this invention is to provide a die-casting mold that facilitates subsequent burr removal.
[0006] To achieve the above objectives, the die-casting mold of this utility model, which facilitates subsequent burr removal, includes an upper mold and a lower mold that move in the vertical direction. The lower mold has a forming cavity with its opening facing upwards. The lower mold also has multiple forming ribs arranged spaced apart from each other in the horizontal direction within the forming cavity. The upper mold has forming grooves of the same number as the forming ribs, each fitting into the other. The upper ends of the forming ribs are placed in the forming grooves after the upper and lower molds are closed. The surface of the upper end of the forming rib includes a top surface and two upwardly inclined, narrowing left and right slopes. The top surface connects the left and right slopes, and at least a portion of the top surface is parallel to the parting surface of the die-casting mold. The wall of the forming groove includes a groove bottom surface facing the top surface, a left groove side slope facing the left slope, and a right groove side slope facing the right slope. At least a portion of the groove bottom surface is parallel to the parting surface.
[0007] Compared with the prior art, since the upper end of the forming rib is placed in the forming groove after the upper and lower molds are closed, the upper end of the forming rib and the forming groove are the point where the upper and lower molds meet. Furthermore, since the surface of the upper end of the forming rib includes a left inclined surface and a right inclined surface that slope upwards and narrows towards each other, and a top surface connecting the left and right inclined surfaces, at least a portion of the top surface is parallel to the parting surface of the die-casting mold. The wall surface of the forming groove includes a groove bottom surface facing the top surface, a left groove side inclined surface facing the left inclined surface, and a right groove side inclined surface facing the right inclined surface, at least a portion of the groove bottom surface is parallel to the parting surface. This design allows the upper and lower molds to meet by inclined surfaces, and makes the direction of the burr between the upper end of the forming rib and the forming groove different from the direction of the position of the die-cast workpiece between two adjacent forming ribs. Therefore, this position avoids the constraint and restriction on burr removal, thereby facilitating subsequent burr removal and saving time and reducing costs.
[0008] Preferably, the top surface includes a front plane parallel to the parting surface and a rear inclined plane that is inclined downward relative to the parting surface.
[0009] Preferably, the bottom surface of the groove includes a front plane of the groove bottom that is parallel to the parting surface and a rear inclined plane of the groove bottom that is inclined downward relative to the parting surface.
[0010] Preferably, the left inclined surface is parallel to the left groove side inclined surface, the right inclined surface is parallel to the right groove inclined surface, and the top surface is parallel to the bottom surface of the groove.
[0011] Preferably, the left inclined plane and the right inclined plane are arranged symmetrically, and the angle between the left inclined plane and the right inclined plane and the plane of symmetry is 15 degrees.
[0012] Preferably, the left groove side slope and the right groove side slope are arranged symmetrically, and the angle between the left groove side slope and the right groove side slope and the plane of symmetry is 15 degrees.
[0013] Preferably, the plane of symmetry of the left inclined plane and the right inclined plane coincides with the plane of symmetry of the left groove side inclined plane and the right groove side inclined plane.
[0014] Preferably, the cross-section of the formed rib is an isosceles trapezoid that is thinner at the top and thicker at the bottom.
[0015] Preferably, there are tangentially arranged arc surfaces between the top surface and the left inclined surface and between the top surface and the right inclined surface.
[0016] Preferably, there are tangentially arranged arc surfaces between the bottom surface of the trough and the left trough side slope, and between the bottom surface of the trough and the right trough side slope. Attached Figure Description
[0017] Figure 1This is a perspective view of the die-casting mold of this utility model.
[0018] Figure 2 yes Figure 1 The diagram shown is an exploded three-dimensional view of the die-casting mold.
[0019] Figure 3 yes Figure 2 A further exploded 3D diagram.
[0020] Figure 4 yes Figure 3 Enlarged view of section D.
[0021] Figure 5 yes Figure 1 The die-casting mold shown is a plan view viewed in the direction indicated by arrow C.
[0022] Figure 6 It is along Figure 5 Internal view of the section cut along the EE line.
[0023] Figure 7 yes Figure 6 Enlarged view of section F in the middle.
[0024] Figure 8 yes Figure 7 Enlarged view after the die-cast workpiece is hidden.
[0025] Figure 9 This is a perspective view of the upper mold in the die-casting mold of this utility model.
[0026] Figure 10 yes Figure 9 A magnified view of section G in the middle. Detailed Implementation
[0027] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.
[0028] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 The die-casting mold 100 of this utility model includes an upper mold 10 and a lower mold 20 that move in the vertical direction to open and close, so that the upper mold 10 can move downward to close together with the lower mold 20, or move upward to separate from the lower mold 20.
[0029] The lower mold 20 has a forming cavity 21 with its opening 211 facing upwards. The lower mold 20 also has multiple forming ribs 22 arranged spaced apart from each other in the left-right direction within the forming cavity 21. Optionally, [the following is omitted as it is not directly related to the mold design]. Figure 7 and Figure 8In this example, the cross-section of the forming rib 22 is an isosceles trapezoid that is thinner at the top and thicker at the bottom. This facilitates the mold opening operation between the upper mold 10 and the lower mold 20 in the die-casting mold 100 of this invention. It also ensures that the space between two adjacent forming ribs 22 forms a rib structure 210 that is thicker at the bottom and thinner at the top in the die-cast workpiece 220 during the die-casting process. This ensures that the orientation of the rib structure 210 is exactly opposite to the orientation of the burr 220 described below. For example, in... Figure 7 In this design, the rib structure 210 is arranged downwards while the burr 220 is arranged upwards. Therefore, the burr 220 can be removed from above without being restricted by the rib structure 210 below, making the removal of the burr 220 very convenient, thus saving time and reducing costs. On the other hand, it facilitates the demolding operation of the die-cast workpiece 200 in the mold opening process of the die-casting mold 100 of this utility model.
[0030] Meanwhile, the upper mold 10 has the same number of forming grooves 11 as the forming ribs 22, and each groove 11 is matched with a corresponding forming rib 22. The upper end 22a of the forming rib 22 is placed in the forming groove 11 after the upper mold 10 and lower mold 20 are closed, as shown in the diagram. Figure 8 As shown. Also, at Figure 8 In the middle, the surface of the upper end 22a of the forming rib 22 includes a top surface 221 and a left inclined surface 222 and a right inclined surface 223 that slope upwards and narrow towards each other. The top surface 221 connects between the left inclined surface 222 and the right inclined surface 223. At least a portion of the top surface 221 is connected to the parting surface P1 of the die-casting mold 100 of this utility model (see Figure 6 Parallel. Furthermore, the wall surface of the forming groove 11 includes a groove bottom surface 111 facing the top surface 221, a left groove side slope 112 facing the left slope 222, and a right groove side slope 113 facing the right slope 223. At least a portion of the groove bottom surface 111 is parallel to the parting surface P1 of the die-casting mold 100 of this invention. Therefore, with the cooperation of the top surface 221, the left slope 222, and the right slope 223, as well as the cooperation of the groove bottom surface 111, the left groove side slope 112, and the right groove side slope 113, the demolding of the burr 210 and the rib structure 220 in the die-cast workpiece 200 is more convenient. More specifically, see the description below.
[0031] like Figure 8As shown, as an example, there are tangentially arranged arc surfaces 224 between the top surface 221 and the left inclined surface 222, and between the top surface 221 and the right inclined surface 223. That is, the arc surface 224 between the top surface 221 and the left inclined surface 222 is tangent to the top surface 221 and the left inclined surface 222, respectively, and the arc surface 224 between the top surface 221 and the right inclined surface 223 is tangent to the top surface 221 and the right inclined surface 223, respectively; the bottom surface 111 of the groove and the left side inclined surface 112 of the groove, and the bottom surface 111 of the groove and the right side inclined surface 112 of the groove, are also tangent to each other. Each of the three sections has a tangentially arranged arc surface 114. That is, the arc surface 114 between the bottom surface 111 and the left side slope 112 is tangent to both the bottom surface 111 and the left side slope 112, and the arc surface 114 between the bottom surface 111 and the right side slope 113 is tangent to both the bottom surface 111 and the right side slope 113. Therefore, the arc surface 114 (224) facilitates the demolding operation of the die-cast workpiece 200 and reduces stress concentration in the die-cast workpiece 200. Furthermore, in... Figure 8 In this example, the left slope 222 is parallel to the left groove side slope 112, the right slope 223 is parallel to the right groove slope 113, and the top surface 221 is parallel to the groove bottom surface 111, to ensure that the thickness of the burr 210 is as consistent as possible at each location. Furthermore, the left inclined plane 222 and the right inclined plane 223 are arranged symmetrically, and the angle between the left inclined plane 222 and the right inclined plane 223 and the plane of symmetry P2 is 15 degrees. Since the left side inclined plane 112 is parallel to the left inclined plane 222 and the right side inclined plane 113 is parallel to the right inclined plane 223, when the left side inclined plane 112 and the right side inclined plane 113 are arranged symmetrically, the angle between the left side inclined plane 112 and the right side inclined plane 113 and the plane of symmetry P2 is 15 degrees, and the plane of symmetry of the left inclined plane 222 and the right inclined plane 223 coincides with the plane of symmetry of the left side inclined plane 112 and the right side inclined plane 113.
[0032] Combination Figure 3 and Figure 4 As an example, the top surface 221 includes a front plane 2211 parallel to the parting surface P1 and a rear inclined plane 2212 that slopes downward relative to the parting surface P1; correspondingly, in conjunction with Figure 9 and Figure 10 As an example, the bottom surface 221 of the groove includes a front groove bottom plane 2211 that is parallel to the parting surface P1 and a rear groove bottom inclined plane 2212 that is inclined downward relative to the parting surface P1. This design can ensure the smooth flow of materials during the die casting process and facilitate the demolding operation of the die-cast workpiece 200 in the die casting mold 100 of this utility model.
[0033] Compared with the prior art, since the upper end 22a of the forming rib 22 is placed in the forming groove 11 after the upper mold 10 and the lower mold 20 are closed, the upper end 22a of the forming rib 22 and the forming groove 11 are the contact points between the upper mold 10 and the lower mold 20; and since the surface of the upper end 22a of the forming rib 22 includes a left inclined surface 222 and a right inclined surface 223 that slope upward and narrow towards each other, and a top surface 221 connecting the left inclined surface 222 and the right inclined surface 223, at least a portion of the top surface 221 is parallel to the parting surface P1 of the die-casting mold 100, and the wall of the forming groove 11 includes a groove bottom surface 111 facing the top surface 221. The left groove side slope 112 facing the left slope 222 and the right groove side slope 113 facing the right slope 223 have at least a portion of the groove bottom surface 111 parallel to the parting surface P1. This design allows the upper mold 10 and the lower mold 20 to use a sloped contact method, and makes the burr 210 appearing between the upper end 22a of the forming rib 22 and the forming groove 11 have a different orientation than the position of the die-cast workpiece 200 located between two adjacent forming ribs 22 (i.e., the aforementioned rib structure 220). Therefore, this position avoids the constraint restriction on the removal of the burr 210, thereby facilitating the subsequent removal of the burr 210, saving time and reducing costs.
[0034] It should be further noted that the parting surface P1 refers to the part of the die-casting mold 100 of this utility model that contacts the upper mold 10 and the lower mold 20 when the mold is closed. Additionally, in the attached drawings, arrow A indicates the direction of the lower mold 20 from bottom to top, arrow B indicates the direction of the lower mold 20 from left to right, and arrow C indicates the direction of the lower mold 20 from front to back.
[0035] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.
Claims
1. A die-casting mold for easy subsequent burr removal, comprising an upper mold and a lower mold that move in a vertical direction, the lower mold having a forming cavity with its opening facing upwards, and the lower mold also having a plurality of forming ribs arranged spaced apart from each other in a horizontal direction within the forming cavity; the upper mold having a number of forming grooves that match the number of forming ribs, and the upper ends of the forming ribs being placed in the forming grooves after the upper and lower molds are closed, characterized in that... The surface at the upper end of the forming rib includes a top surface and a left inclined surface and a right inclined surface that slope upwards and narrows towards each other. The top surface connects between the left inclined surface and the right inclined surface. At least a portion of the top surface is parallel to the parting surface of the die-casting mold. The wall surface of the forming groove includes a groove bottom surface facing the top surface, a left groove side inclined surface facing the left inclined surface, and a right groove side inclined surface facing the right inclined surface. At least a portion of the groove bottom surface is parallel to the parting surface.
2. The die-casting mold according to claim 1, characterized in that, The top surface includes a front plane parallel to the parting surface and a rear inclined plane that slopes downward relative to the parting surface.
3. The die-casting mold according to claim 1, characterized in that, The bottom surface of the groove includes a front plane of the groove bottom that is parallel to the parting surface and a rear inclined plane of the groove bottom that is inclined downward relative to the parting surface.
4. The die-casting mold according to claim 1, characterized in that, The left inclined surface is parallel to the left groove side inclined surface, the right inclined surface is parallel to the right groove inclined surface, and the top surface is parallel to the bottom surface of the groove.
5. The die-casting mold according to claim 1, characterized in that, The left inclined plane and the right inclined plane are arranged symmetrically, and the angle between the left inclined plane and the right inclined plane and the plane of symmetry is 15 degrees.
6. The die-casting mold according to claim 5, characterized in that, The left and right side slopes are arranged symmetrically, and the angle between the left and right side slopes and the plane of symmetry is 15 degrees.
7. The die-casting mold according to claim 6, characterized in that, The plane of symmetry of the left inclined plane and the right inclined plane coincides with the plane of symmetry of the left groove side inclined plane and the right groove side inclined plane.
8. The die-casting mold according to claim 5, characterized in that, The cross-section of the formed rib is an isosceles trapezoid that is thinner at the top and thicker at the bottom.
9. The die-casting mold according to claim 1, characterized in that, There are tangentially arranged arc surfaces between the top surface and the left inclined surface, and between the top surface and the right inclined surface.
10. The die-casting mold according to claim 1, characterized in that, There are tangentially arranged arc surfaces between the bottom surface of the trough and the left trough side slope, and between the bottom surface of the trough and the right trough side slope.