Molding device

Abstract

The utility model discloses a forming device which comprises a mold core, a connecting plate, a first ejector pin, a second ejector pin and a bottom plate. The mold core comprises a first forming cavity, a second forming cavity, a first channel and a second channel, the first channel is communicated with the first forming cavity, the second channel is communicated with the second forming cavity, the first forming cavity is communicated with the second forming cavity, the head, facing the first channel, of the first forming cavity has a first diameter D, and D is smaller than or equal to 1.2 mm. The connecting plate and the mold core are arranged in the first direction. One end of the first thimble is fixed on the connecting plate, and the other end is arranged in the first channel. One end of the second thimble is fixed on the connecting plate, and the other end is arranged in the second channel. In the first direction, the bottom plate is located on the side, away from the mold core, of the connecting plate and used for being connected with an external machine table, the external machine table is used for penetrating through the bottom plate and driving the connecting plate to move, the connecting plate drives the first ejector pin to move in the first channel and drives the second ejector pin to move in the second channel, and the influence of air entrapment on product forming is reduced; the product forming quality is improved.

Description

Technical Field

[0001] This application relates to the field of molds, and more particularly to a molding apparatus. Background Technology

[0002] During the die casting process, molten metal (aluminum, zinc, magnesium, etc.) is squeezed into the molding cavity at high speed and high pressure. The gas in the molding cavity is difficult to escape, especially at the head of the small-sized deep groove, where air entrapment is likely to occur, which in turn causes bubbles and pores to form inside the product, resulting in reduced strength. Utility Model Content

[0003] In view of this, it is necessary to provide a forming device that can reduce the impact of air entrapment on product forming and improve product forming quality.

[0004] Embodiments of this application provide a molding apparatus, including a mold core, a connecting plate, a first ejector pin, a second ejector pin, and a base plate. The mold core includes a first molding cavity, a second molding cavity, a first channel, and a second channel. The first channel communicates with the first molding cavity, the second channel communicates with the second molding cavity, and the first molding cavity communicates with the second molding cavity. The head of the first molding cavity facing the first channel has a first diameter D, where D ≤ 1.2 mm. The connecting plate and the mold core are arranged along a first direction. One end of the first ejector pin is fixed to the connecting plate, and the other end is located in the first channel. One end of the second ejector pin is fixed to the connecting plate, and the other end is located in the second channel. Along the first direction, the base plate is located on the side of the connecting plate opposite to the mold core. The base plate is used to connect to an external machine tool, which passes through the base plate and drives the connecting plate to move. The connecting plate drives the first ejector pin to move within the first channel and drives the second ejector pin to move within the second channel. By setting a first channel connecting the first molding cavity, and placing a first ejector pin in the first channel, during die casting, high-speed, high-pressure molten metal is injected into the first and second molding cavities. Air at the head of the first molding cavity is discharged through the gap between the first ejector pin and the first channel, reducing the impact of air entrapment at the head of the first molding cavity on product molding and improving product molding quality. After molding, the first ejector pin moves repeatedly within the first channel, reducing blockage and facilitating air discharge from the head of the first molding cavity. Furthermore, by adding a first ejector pin, which cooperates with a second ejector pin, the product after molding is facilitated.

[0005] Optionally, in some embodiments of this application, the connecting plate includes a first connecting plate and a second connecting plate stacked along a first direction, with a first ejector pin and a second ejector pin connected to and exposed from the second connecting plate. It also includes an adjusting member connected to the first connecting plate and abutting against the first ejector pin. Along the first direction, the adjusting member is movable relative to the first connecting plate by a first distance. When the first and second connecting plates move along the first direction, the adjusting member moves by the first distance in the opposite direction, causing the second ejector pin to enter the second molding cavity before the first ejector pin. The diameter of the second ejector pin is larger than that of the first ejector pin. After the second ejector pin lifts the product, the product falls, and the first ejector pin is subjected to a reverse force during product demolding, protecting the first ejector pin and extending its service life.

[0006] Optionally, in some embodiments of this application, a first receiving groove is provided on the surface of the first connecting plate facing the second connecting plate. The first receiving groove includes a bottom wall, which is recessed and penetrates the second connecting plate to form a second receiving groove. The radius of the first receiving groove is larger than the radius of the second receiving groove. An adjusting member is provided in the first receiving groove and the second receiving groove. Along the first direction, a portion of the adjusting member moves between the bottom wall and the first ejector pin.

[0007] Optionally, in some embodiments of this application, the adjusting member includes a first part and a second part, the first part being located between the first ejector pin and the bottom wall, the second part being connected to the first part, the second part being disposed in the second receiving groove and protruding from the second receiving groove toward the bottom plate.

[0008] Optionally, in some embodiments of this application, the first ejector pin includes a first segment and a second segment. The first segment is located in the first channel, and the second segment is connected to the first segment. The diameter of the first segment is the same as the first diameter, and the diameter of the second segment is larger than the diameter of the first segment.

[0009] Optionally, in some embodiments of this application, the length L of the first segment along the first direction is 4mm ≤ L ≤ 8mm. If L is less than 4mm, the length of the first segment is too short, making lifting difficult. If L is greater than 8mm, the length of the first segment is too long, resulting in high friction during movement of the first segment within the first channel, which is detrimental to the movement of the first ejector pin. By using 4mm ≤ L ≤ 8mm, the resistance to the movement of the first ejector pin is reduced, facilitating its movement within the first channel and lifting the product.

[0010] Optionally, in some embodiments of this application, a sliding block is further included, which is fixed to the base plate and the connecting plate is slidably connected to the sliding block.

[0011] Optionally, in some embodiments of this application, a mold base is further included, a sliding block is fixedly connected to the mold base, and the mold core is connected to the mold base.

[0012] Optionally, in some embodiments of this application, the base plate is provided with an opening for an external machine to pass through and to lift or pull the connecting plate.

[0013] Optionally, in some embodiments of this application, the depth of the first molding cavity is greater than the depth of the second molding cavity along the first direction.

[0014] This application establishes a first channel connecting the first molding cavity, with a first ejector pin positioned within the first channel. During die casting, high-speed, high-pressure molten metal is injected into both the first and second molding cavities. Air at the head of the first molding cavity is discharged through the gap between the first ejector pin and the first channel, reducing the impact of air entrapment at the head of the first molding cavity on product molding and improving product molding quality. After molding, the first ejector pin repeatedly moves within the first channel, reducing blockage and facilitating air discharge from the head of the first molding cavity. Furthermore, the addition of the first ejector pin, which cooperates with the second ejector pin, facilitates the molding of the product after ejection. Attached Figure Description

[0015] Figure 1 A schematic diagram of the molding apparatus in one embodiment is shown.

[0016] Figure 2 An exploded view of the molding apparatus in one embodiment is shown.

[0017] Figure 3 A schematic diagram of the structure of the first ejector pin, the second ejector pin, and the adjusting member in one embodiment is shown.

[0018] Figure 4 A cross-sectional schematic diagram of the molding apparatus in one embodiment is shown.

[0019] Figure 5 It indicated Figure 4 Enlarged diagram of point A in the middle.

[0020] Figure 6 It indicated Figure 4 Enlarged diagram of point B in the middle.

[0021] Explanation of main component symbols

[0022] Molding device 100

[0023] Model 10

[0024] First molding cavity 11

[0025] Head 111

[0026] Second molding cavity 12

[0027] First Channel 13

[0028] Second Channel 14

[0029] Connecting plate 20

[0030] First connecting plate 21

[0031] first recess 21a

[0032] Second recess 22a

[0033] First containment tank 211

[0034] Bottom wall 2111

[0035] Second containment tank 212

[0036] Second connecting plate 22

[0037] First thimble 30

[0038] Section 31

[0039] Section 32

[0040] Section 33

[0041] Second thimble 40

[0042] Base plate 50

[0043] Opening 51

[0044] Adjustment component 60

[0045] Part 1, Chapter 61

[0046] Part 2, page 62

[0047] Sliding block 70

[0048] Projection 71

[0049] Mold base 80

[0050] First direction X

[0051] The following specific embodiments will further illustrate this application in conjunction with the above-described accompanying drawings. Detailed Implementation

[0052] The following specific embodiments are exemplary and not limiting, and are intended to provide a basic understanding of this application, and are not intended to identify key or decisive elements of this application or limit the scope of protection. As long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

[0053] When a component is considered to be "located" on another component, it can be directly on the other component or may also be interspersed with other components. When a component is considered to be "connected" to another component, it can be directly connected to the other component or may also be interspersed with other components.

[0054] It is understandable that the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately perpendicular or equal to each other. For example, combined with numerical description, perpendicularity can refer to the angle between two straight lines within the range of 90° ± 10°, the dihedral angle between two planes within the range of 90° ± 10°, or the angle between a straight line and a plane within the range of 90° ± 10°. The two components described as "perpendicular" do not have to be absolutely straight lines or planes; they can be approximately straight lines or planes. From a macroscopic perspective, if the overall direction of extension is a straight line or plane, the component can be considered a "straight line" or "plane".

[0055] Unless otherwise defined, the term "multiple" in this document, when used to describe the number of components, specifically means that the component is two or more.

[0056] The following describes some embodiments of this application in detail with reference to the accompanying drawings.

[0057] Please see Figures 1 to 6 This application provides a molding apparatus 100, including a mold core 10, a connecting plate 20, a first ejector pin 30, a second ejector pin 40, and a base plate 50. The mold core 10 includes a first molding cavity 11, a second molding cavity 12, a first channel 13, and a second channel 14. The first channel 13 connects to the first molding cavity 11, and the second channel 14 connects to the second molding cavity 12. The first molding cavity 11 has a first diameter D, ≤ 1.2 mm, at its head 111 facing the first channel 13. The connecting plate 20 and the mold core 10 are arranged along a first direction X. One end of the first ejector pin 30 is fixed to the connecting plate 20, and the other end is located in the first channel 13. One end of the second ejector pin 40 is fixed to the connecting plate 20, and the other end is located in the second channel 14. Along the first direction X, the base plate 50 is located on the side of the connecting plate 20 away from the mold core 10. The base plate 50 is used to connect to the external machine tool. The external machine tool is used to pass through the base plate 50 and drive the connecting plate 20 to move. The connecting plate 20 drives the first ejector pin 30 to move in the first channel 13 and drives the second ejector pin 40 to move in the second channel 14.

[0058] Along the first direction X, the depth of the first molding cavity 11 is greater than the depth of the second molding cavity 12, and the diameter of the head 111 of the first molding cavity 11 is less than or equal to 1.2 mm. Therefore, the head 111 of the first molding cavity 11 is more prone to air entrapment. This application addresses this by providing a first channel 13 connecting the first molding cavity 11, with a first ejector pin 30 disposed in the first channel 13. During die casting, high-speed, high-pressure liquid metal is injected into the first molding cavity 11 and the second molding cavity 12. Air at the head of the first molding cavity 11 is discharged through the gap between the first ejector pin 30 and the first channel 13, reducing the impact of air entrapment at the head of the first molding cavity 11 on product molding and improving product molding quality. After molding, the first ejector pin 30 repeatedly moves within the first channel 13, reducing blockage and facilitating air discharge from the head of the first molding cavity 11. Furthermore, the addition of the first ejector pin 30, which cooperates with the second ejector pin 40, facilitates the molding of the product.

[0059] It is understandable that the gap between the first ejector pin 30 and the first channel 13 refers to the tolerance gap between the first ejector pin 30 and the first channel 13, which is usually around 0.01mm.

[0060] In some embodiments, 0.8mm ≤ D ≤ 1.2mm. The diameter of the portion of the first ejector pin 30 located in the first channel 13 is the same as the first diameter. When D is less than 0.8mm, the diameter of the first ejector pin 30 is too small, resulting in low strength and easy breakage during product ejection. When D is greater than 1.2mm, the occurrence of air entrapment in the head 111 of the first molding cavity 11 is reduced. Optionally, D can be any one or a range of any two of 0.8mm, 0.9mm, 1.0mm, 1.1mm, and 1.2mm.

[0061] Please see Figures 2 to 4 and Figure 6 In some embodiments, the connecting plate 20 includes a first connecting plate 21 and a second connecting plate 22 stacked along a first direction X. One end of the first ejector pin 30 is disposed in the first channel 13, and the other end is connected to and exposed from the second connecting plate 22. One end of the second ejector pin 40 is disposed in the second channel 14, and the other end is connected to and exposed from the second connecting plate 22. The second ejector pin 40 abuts against the first connecting plate 21.

[0062] In some embodiments, the molding apparatus 100 includes an adjusting member 60, which is connected to a first connecting plate 21 and abuts against a first ejector pin 30. Along a first direction X, the adjusting member 60 can move a first distance H relative to the first connecting plate 21. When the first connecting plate 21 and the second connecting plate 22 move along the first direction X, the adjusting member 60 moves the first distance H in the opposite direction to the first direction X, causing the second ejector pin 40 to extend into the second molding cavity 12 before the first ejector pin 30. After the second ejector pin 40 lifts the product, the product falls, and the first ejector pin 30 is protected by the reverse force during product demolding, extending its service life.

[0063] In some embodiments, the diameter of the second ejector pin 40 is larger than the diameter of the first ejector pin 30, thereby further extending the service life of the first ejector pin 30.

[0064] Specifically, when the product is ejected, both the first ejector pin 30 and the second ejector pin 40 abut against the bottom of the product. First, the external machine tool drives the first connecting plate 21 and the second connecting plate 22 to move, which in turn drives the first ejector pin 30 and the second ejector pin 40 to move. When the second ejector pin 40 lifts the product, due to the presence of the first ejector pin 30 abutting against the adjusting member 60 and the first gap H, under the reverse force, the adjusting member 60 moves the first gap H in the direction opposite to the first direction X, so that the adjusting member 60 abuts against the first connecting plate 21. The first connecting plate 21 and the second connecting plate 22 then drive the first ejector pin 30 to extend into the first molding cavity 11. At this time, the second ejector pin 40, which has a larger diameter, lifts most of the weight of the molded product, while the first ejector pin 30 bears a small portion of the weight, protecting the first ejector pin 30 and extending its service life.

[0065] Please see Figure 6 The surface of the first connecting plate 21 facing the second connecting plate 22 is provided with a first receiving groove 211. The first receiving groove 211 includes a bottom wall 2111, which is recessed and penetrates the second connecting plate 22 to form a second receiving groove 212. The radius of the first receiving groove 211 is larger than the radius of the second receiving groove 212. An adjusting member 60 is provided in the first receiving groove 211 and the second receiving groove 212. Along the first direction X, a part of the adjusting member 60 moves between the bottom wall 2111 and the first ejector pin 30.

[0066] In some embodiments, the adjusting member 60 includes a first portion 61 located between the first ejector pin 30 and the bottom wall 2111. Before ejecting the product, the distance between the first portion 61 and the bottom wall 2111 is a first gap H. After ejecting the product, the first portion 61 contacts and connects to the bottom wall 2111. Specifically, the first ejector pin 30 pushes the first portion 61, causing the first portion 61 to move a first gap H in a direction opposite to the first direction X, after which the first portion 61 contacts and connects to the bottom wall 2111.

[0067] In some embodiments, the adjusting member 60 includes a second portion 62 connected to the first portion 61. The second portion 62 is disposed in the second receiving groove 212 and protrudes from the second receiving groove 212 toward the base plate 50. After the product is ejected, the first ejector pin 30, the second ejector pin 40, and the adjusting member 60 need to be reset. The external machine tool pulls the first connecting plate 21 and the second connecting plate 22 in a direction opposite to the first direction X, causing the first ejector pin 30 to retract from the first molding cavity 11 and the second ejector pin 40 to retract from the second molding cavity 12. One end of the second portion 62 protruding from the second receiving groove 212 abuts against the base plate 50. Under the pushing action of the base plate 50, the adjusting member 60 moves a first distance H along the first direction X.

[0068] Please see Figure 3 In some embodiments, the first ejector pin 30 includes a first segment 31. The first segment 31 is disposed in the first channel 13. The diameter of the first segment 31 is the same as the first diameter of the head of the first molding cavity 11.

[0069] In some embodiments, along the first direction X, the length L of the first segment 31 is 4mm ≤ L ≤ 8mm. If L is less than 4mm, the length of the first segment 31 is too short, making lifting difficult. If L is greater than 8mm, the length of the first segment 31 is too long, resulting in high friction during movement of the first segment 31 within the first channel 13, which is detrimental to the movement of the first ejector pin 30. By using 4mm ≤ L ≤ 8mm, the resistance to movement of the first ejector pin 30 is reduced, facilitating its movement within the first channel 13 and enabling it to lift the product.

[0070] Optionally, L can be any one or any combination of 4mm, 5mm, 6mm, 7mm, and 8mm.

[0071] In some embodiments, the first ejector pin 30 includes a second segment 32 connected to the first segment 31. The diameter of the second segment 32 is larger than the diameter of the first segment 31, which helps to improve the strength of the first ejector pin 30.

[0072] In some embodiments, the first ejector pin 30 includes a third segment 33, which is connected to the second segment 32 and the second connecting plate 22. The diameter of the third segment 33 is larger than the diameter of the second segment 32, which further enhances the strength of the first ejector pin 30.

[0073] Please see Figure 1 and Figure 2 In some embodiments, the molding device 100 includes a sliding block 70, which is fixed to the base plate 50, and the connecting plate 20 is slidably connected to the sliding block 70.

[0074] The sliding block 70 is provided on opposite sides of the base plate 50. The sliding block 70 is provided with a protrusion 71, the first connecting plate 21 is provided with a first recess 21a, and the second connecting plate 22 is provided with a second recess 22a. The protrusion 71 is provided in the first recess 21a and the second recess 22a, so as to limit the sliding direction of the first connecting plate 21 and the second connecting plate 22 along the first direction X.

[0075] In some embodiments, the molding apparatus 100 further includes a mold base 80, the mold base 80 being fixedly connected to a sliding block 70, and the mold core 10 being connected to the mold base 80.

[0076] In some embodiments, the base plate 50 is provided with an opening 51 for an external machine to pass through and to lift or pull the first connecting plate 21 and the second connecting plate 22.

[0077] When the molding device 100 demolds the product, it first moves the first connecting plate 21 and the second connecting plate 22 via an external machine tool, which in turn moves the first ejector pin 30 and the second ejector pin 40. When the second ejector pin 40 lifts the product, the first ejector pin 30 pushes the first part 61, causing the first part 61 to move a first distance H in the direction opposite to the first direction X. After the first part 61 contacts the connecting bottom wall 2111, the first ejector pin 30 extends into the first molding cavity 11. After removing the product, the external machine tool pulls the first connecting plate 21 and the second connecting plate 22 in the direction opposite to the first direction X, causing the first ejector pin 30 to retract from the first molding cavity 11 and the second ejector pin 40 to retract from the second molding cavity 12. The end of the second part 62 protruding from the second receiving groove 212 abuts against the bottom plate 50. Under the pushing action of the bottom plate 50, the adjusting member 60 moves a first distance H in the first direction X.

[0078] This application establishes a first channel 13 connecting the first molding cavity 11, with a first ejector pin 30 disposed within the first channel 13. During die casting, high-speed, high-pressure liquid metal is injected into the first molding cavity 11 and the second molding cavity 12. Air at the head of the first molding cavity 11 is discharged through the gap between the first ejector pin 30 and the first channel 13, reducing the impact of air entrapment at the head of the first molding cavity 11 on product molding and improving product molding quality. After molding, the first ejector pin 30 repeatedly moves within the first channel 13, reducing blockage and facilitating air discharge from the head of the first molding cavity 11. Furthermore, the addition of the first ejector pin 30, which cooperates with the second ejector pin 40, facilitates the ejection of the molded product. An adjusting member 60 allows the second ejector pin 40 to enter the second molding cavity 12 before the first ejector pin 30, reducing the reverse force on the first ejector pin 30 during product demolding after the product falls following the second ejector pin 40's lifting action, protecting the first ejector pin 30 and extending its service life.

[0079] Those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the spirit and essence of this application fall within the scope of this application's disclosure.

Claims

1. A molding apparatus, characterized in that, include: The mold core includes a first molding cavity, a second molding cavity, a first channel, and a second channel. The first channel is connected to the first molding cavity, the second channel is connected to the second molding cavity, and the first molding cavity is connected to the second molding cavity. The head of the first molding cavity facing the first channel has a first diameter D, where D≤1.2mm. A connecting plate, wherein the connecting plate and the mold core are arranged along a first direction; The first ejector pin has one end fixed to the connecting plate and the other end located in the first channel; The second ejector pin has one end fixed to the connecting plate and the other end located in the second channel; The base plate, along the first direction, is located on the side of the connecting plate opposite to the mold core. The base plate is used to connect to an external machine tool. The external machine tool passes through the base plate and drives the connecting plate to move. The connecting plate drives the first ejector pin to move in the first channel and drives the second ejector pin to move in the second channel.

2. The molding apparatus as described in claim 1, characterized in that, The connecting plate includes a first connecting plate and a second connecting plate stacked along the first direction, wherein the first ejector pin and the second ejector pin are connected to the second connecting plate and exposed from the second connecting plate; It also includes an adjusting member, which is connected to the first connecting plate and abuts against the first ejector pin. Along the first direction, the adjusting member can move relative to the first connecting plate by a first distance. When the first connecting plate and the second connecting plate move along the first direction, the adjusting member moves the first gap in the opposite direction to the first direction, so that the second ejector pin extends into the second molding cavity before the first ejector pin, and the diameter of the second ejector pin is greater than the diameter of the first ejector pin.

3. The molding apparatus as described in claim 2, characterized in that, The first connecting plate has a first receiving groove on its surface facing the second connecting plate. The first receiving groove includes a bottom wall, which is recessed and penetrates the second connecting plate to form a second receiving groove. The radius of the first receiving groove is larger than the radius of the second receiving groove. The adjusting member is disposed in the first receiving groove and the second receiving groove. Along the first direction, a portion of the adjusting member moves between the bottom wall and the first ejector pin.

4. The molding apparatus as described in claim 3, characterized in that, The adjusting member includes a first part and a second part. The first part is located between the first ejector pin and the bottom wall. The second part is connected to the first part and is disposed in the second receiving groove, protruding from the second receiving groove toward the bottom plate.

5. The molding apparatus as described in claim 2, characterized in that, The first ejector pin includes a first section and a second section. The first section is located in the first channel, and the second section is connected to the first section. The diameter of the first section is the same as the diameter of the first section, and the diameter of the second section is larger than the diameter of the first section.

6. The molding apparatus as described in claim 5, characterized in that, Along the first direction, the length L of the first segment is 4mm ≤ L ≤ 8mm.

7. The molding apparatus as described in claim 1, characterized in that, It also includes a sliding block, which is fixed to the base plate, and the connecting plate is slidably connected to the sliding block.

8. The molding apparatus as described in claim 7, characterized in that, It also includes a mold base, which is fixedly connected to the sliding block, and the mold core is connected to the mold base.

9. The molding apparatus as described in claim 1, characterized in that, The base plate has an opening for the external machine to pass through and to lift or pull the connecting plate.

10. The molding apparatus as claimed in claim 1, characterized in that, Along the first direction, the depth of the first molding cavity is greater than the depth of the second molding cavity.

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