A four-loop spring punch top screw structure

Abstract

The utility model discloses a four ring spring punch top spiral structure, including ring seat, one end can cooperate with the connector, the outer peripheral wall of ring seat is equipped with oil ring groove, oil ring is placed in oil ring groove, oil injection channel is equipped in the ring seat peripheral wall, and along ring seat axial extension, the first spiral convex ring is equipped with in the outer end surface of ring seat, and the adjacent first spiral convex ring forms the groove with equal or unequal depth, compared with the prior art punch / ring seat top plane structure, and the ring seat top / outer side adds the spiral structure, and the contact area of material and punch is increased, and the cooling effect is increased, plays a better heat conduction, heat dissipation effect, improves the explosive material cake and cooling effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of pressure casting equipment, specifically relating to a spiral structure at the top of a four-ring spring punch. Background Technology

[0002] Pressure casting is a casting method in which liquid or semi-solid metal or alloy, or liquid metal or alloy containing reinforcing phases, is filled into the cavity of a die-casting mold at high pressure and high speed, and the metal or alloy is solidified under pressure to form a casting.

[0003] The injection punch is a key component of the pressure casting machine. In the pressure casting process, the injection punch is mainly used to inject molten metal into the mold cavity. The performance of the injection punch directly affects the quality of the product.

[0004] In existing technology, the injection punch is prone to severe wear due to repeated friction between its reciprocating motion and the walls of the molten cup and injection chamber. This results in poor sealing performance and further causes the vacuum effect in the mold cavity to fail to reach a stable state, leading to products that do not meet quality requirements. In particular, this significantly reduces the product qualification rate in high vacuum die casting environments.

[0005] While conducting early research on the problem of friction and wear between the punch, melting cup, and injection chamber wall, the applicant filed patent application CN202022672005.2, which discloses a spring-supported ring punch. Through the steel and copper rings installed on the punch, under the action of the internal support spring, the frictional loss between the copper ring and the melting cup can be stably compensated, ensuring that the copper ring and the inner wall of the injection chamber are always tightly fitted. The high sealing state achieved by this compensation method can stably reduce the vacuum value, greatly improving product quality. It can better leverage its cost-effectiveness in high-vacuum die casting applications, providing strong support for the production of high-end products by large-tonnage casting equipment and improving the yield rate of high-end products.

[0006] Further research by the applicant revealed that due to structural defects, the technical solution is prone to "bursting cake" phenomenon (also known as cold shut, incomplete pouring, or die casting cake defect) in its die casting process. The reason is that the top of the existing punch is flat, which affects the local cooling rate of the barrel (pressure chamber) or mold, causing the molten aluminum to solidify prematurely before completely filling the cavity, forming irregular cake-shaped or sheet-shaped metal residues. Therefore, the original structure needs to be further improved and perfected. Utility Model Content

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A spiral structure at the top of a four-ring spring punch includes:

[0009] The ring seat has one end that can mate with the connector, and the outer peripheral wall of the ring seat has an oil ring groove.

[0010] The oil injection ring is placed inside the oil ring groove;

[0011] The oil injection channel is formed inside the peripheral wall of the ring seat and extends along the axial direction of the ring seat;

[0012] An oil drain port is provided on the oil ring groove and is connected to the oil injection channel;

[0013] The oil injection ring is provided with several sets of oil injection through holes that can be connected to the oil drain port.

[0014] The outer end face of the ring seat is provided with a first spiral convex ring, and grooves with equal or different depths are formed between adjacent first spiral convex rings;

[0015] The widths of the grooves in each group may be equal or unequal;

[0016] A second spiral protrusion is also provided on the other side of the ring seat away from the first spiral protrusion.

[0017] Furthermore, the oil ring groove includes a first groove surface that contacts the inner wall of the fuel injection ring and a second groove surface that has a gap with the inner wall of the fuel injection ring.

[0018] Furthermore, the oil drain port is located on the second groove surface.

[0019] Furthermore, at least one set of fastening holes are correspondingly provided on the oil injection ring and the first groove surface.

[0020] Furthermore, the injection ring has a break line on its surface, making the entire injection ring a discontinuous annular structure.

[0021] Furthermore, a first steel ring, at least one copper ring, and a second steel ring are sequentially fitted on the outer circumference of the ring seat from the end furthest from the connector to the connector.

[0022] Furthermore, the oil injection ring is disposed between the copper ring and the second steel ring.

[0023] Furthermore, the ring seat or connector is provided with an oil inlet that can communicate with the oil injection channel.

[0024] Compared with the prior art, this utility model has the following advantages:

[0025] Compared to the existing punch / ring seat top flat structure, this ring seat has a spiral structure added to the top / outer side, which increases the contact area between the material and the punch, improves the cooling effect, and plays a better role in heat conduction and heat dissipation. This improves the bursting and cooling effect. When molten aluminum is introduced into the barrel, it is injected into the mold through the injection rod and punch. After being rapidly cooled by the barrel, the bursting phenomenon is improved, and the product qualification rate is increased. Attached Figure Description

[0026] Figure 1 This is a schematic cross-sectional view of the ring seat in a specific embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the right side of the ring seat in a specific embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram illustrating the overall structure of a specific embodiment of the present utility model;

[0029] Figure 4 This is a cross-sectional structural diagram illustrating a specific embodiment of the present utility model;

[0030] Figure 5 This is a partial structural diagram illustrating a specific embodiment of the present utility model;

[0031] Figure 6 This is a schematic diagram illustrating the exploded structure of a specific embodiment of the present invention;

[0032] The reference numerals in the accompanying drawings include:

[0033] 1. Ring seat, 10. Oil ring groove, 100. First groove surface, 101. Second groove surface, 11. Oil injection channel, 12. Oil outlet, 13. Oil injection port, 2. Oil injection through hole, 20. Fastening hole, 21. Disconnect line, 22. First steel ring, 3. Copper ring, 4. Second steel ring, 5. Connector, 6. First spiral convex ring, 7. Groove, 70. Second spiral convex ring, 8. Cover plate, 9. Inner water pipe, 90. Detailed Implementation

[0034] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] like Figure 1 - Figure 6 As shown, the present invention provides a four-ring spring punch top spiral structure, including a ring seat 1 and an oil injection ring 2;

[0036] One end of the ring seat 1 can be engaged with the connector 6 and connected together, while the tail of the connector 6 is connected to the injection rod (not shown in the figure).

[0037] On the outer circumference of the ring seat 1, from the end furthest from the connector 6 to the connector 6, a first steel ring 3, at least one copper ring 4, and a second steel ring 5 are sequentially fitted.

[0038] like Figure 1 , Figure 2 As shown, a first spiral protrusion 7 is provided on the outer end face of the ring seat 1, and grooves 70 with equal or different depths are formed between adjacent first spiral protrusions 7;

[0039] The width of each group of grooves 70 may be equal or unequal. The radius of the spiral line on the outer circle is larger, and the increase in radius is consistent, forming a concentric circle. Alternatively, the increase in radius can gradually increase, forming a diffuse shape. There is no specific limit to the number of spiral turns, which can be adjusted according to actual needs.

[0040] The groove 70 has an inclined sidewall, which allows for better processing and shaping.

[0041] Of course, a second spiral protrusion 8 can also be provided on the other side of the ring seat 1 away from the first spiral protrusion 7;

[0042] The second spiral convex ring 8 allows the cooling water flowing into the injection rod from the inlet pipe 90 at the tail of the connector 6 to flow along the structure of the second spiral convex ring 8 towards the gap between the connector 6 and the ring seat 1 under the action of the cover plate 9. This allows the inner wall of the ring seat 1 to dissipate heat and cool down, while the cooling water flows back along the outer wall of the inlet pipe 90 to the end of the injection rod for cyclic cooling. The flow direction of the cooling water is as follows: Figure 4 As shown.

[0043] In the above process, the setting of the second helical convex ring 8 is crucial, such as... Figure 4 As shown. While the first spiral convex ring 7 is designed for cooling, the second spiral convex ring 8 further enhances the cooling effect, resulting in better heat conduction and dissipation, thus improving the cooling and cooling performance. The cover plate is bolted to the connector and fitted with a sealing ring. A large chamfer is added to the top surface of the cover plate to act as a guide when installing the inlet water pipe, facilitating its installation.

[0044] Compared to the existing punch / ring seat top flat structure, this ring seat has a spiral structure added to the top / outer side, which increases the contact area between the material and the punch, improves the cooling effect, and plays a better role in heat conduction and heat dissipation. This improves the bursting and cooling effect. When molten aluminum is introduced into the barrel, it is injected into the mold through the injection rod and punch. After being rapidly cooled by the barrel, the bursting phenomenon is improved, and the product qualification rate is increased.

[0045] like Figure 6As shown, multiple annular grooves are spaced apart on the outer circumference of the ring seat 1. An inner support spring is installed in the annular groove to support the copper ring 4, the first steel ring 3, and the second steel ring 5. Under the action of the inner support spring, the copper ring 4 and the second steel ring 5 always bulge outward, which can offset the wear caused by wear, thereby ensuring a precise fit between the punch and the injection chamber wall, good sealing, continuous and stable compensation for frictional loss, and stable sealing state.

[0046] Since this spring punch is an improvement on the technical solution mentioned in the background art, the specific configuration of its components will not be described in detail here.

[0047] In this utility model, an oil ring groove 10 is also provided on the outer peripheral wall of the ring seat 1;

[0048] The fuel injection ring 2 is embedded in the oil ring groove 10;

[0049] like Figure 4 As shown, an oil injection channel 11 is provided inside the peripheral wall of the ring seat 1, and the oil injection channel 11 extends along the axial direction of the ring seat 1. An oil injection port 13 that can communicate with the oil injection channel 11 is provided on the ring seat 1 or the connector 6.

[0050] like Figure 5 As shown, an oil drain port 12 is provided on the oil ring groove 10, and the oil drain port 12 is connected to the oil injection channel 11.

[0051] An oil spray ring 2 is added to the ring seat 1 of the punch to provide uniform lubrication to the first steel ring 3, copper ring 4 and second steel ring 5, making the punch run back and forth on the inner wall of the melting cup more smoothly, reducing frictional resistance, providing better protection for the pressure chamber and the punch, and extending the service life of the pressure chamber, the punch and each metal ring.

[0052] Among them, the two sides of the injection ring are provided with several sets of injection through holes 20 that can be connected to the oil drain port 12.

[0053] The oil injection ring 2 adopts multiple sets of oil injection through holes 20 in the circumferential direction. The installation form of the oil injection ring 2 and the ring groove can transform the original single set of oil discharge port 12 into multiple sets of oil injection through holes 20 in this solution. With the uniform distribution of the oil injection through holes 20, the peripheral walls of each component can be better lubricated and protected by the oil.

[0054] like Figure 5 As shown, the oil ring groove 10 includes a first groove surface 100 that contacts the inner wall of the injection ring 2 and a second groove surface 101 that has a gap with the inner wall of the injection ring 2. The oil outlet 12 is opened on the second groove surface 101.

[0055] The gap between the second groove surface 101 and the bottom surface of the injection ring 2 forms a channel connecting the above-mentioned oil drain port 12 and the injection through hole 20, guiding the single oil drain port 12 to multiple injection through holes 20.

[0056] In addition, at least one set of fastening holes 21 are correspondingly provided on the oil injection ring 2 and the first groove surface 100. A screw can be used to pass through the fastening hole 21 and cooperate with the corresponding fastening hole 21 on the first groove surface 100 to fix the oil injection ring 2 in the oil ring groove 10, so as to prevent the oil injection ring 2 from rotating during the movement of the punch.

[0057] Specifically, the injection ring 2 has a break line 22 on its surface, making the entire injection ring 2 a discontinuous annular structure. The main purpose of setting the break line 22 is to facilitate installation with the help of installation clamps.

[0058] In this embodiment, the fuel injection ring 2 is disposed between the copper ring 4 and the second steel ring 5.

[0059] It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A spiral structure at the top of a four-ring spring punch, characterized in that, include: The ring seat (1) has one end that can be matched with the connector (6), and the outer peripheral wall of the ring seat (1) is provided with an oil ring groove (10). The oil injection ring (2) is placed in the oil ring groove (10); The oil injection channel (11) is opened inside the peripheral wall of the ring seat (1) and extends along the axial direction of the ring seat (1); The outer end face of the ring seat (1) is provided with a first spiral protrusion ring (7), and a groove (70) with equal or different depths is formed between adjacent first spiral protrusion rings (7). The widths of the grooves (70) in each group are equal or unequal; A second spiral protrusion (8) is also provided on the other side of the ring seat (1) away from the first spiral protrusion (7).

2. The spiral structure at the top of a four-ring spring punch as described in claim 1, characterized in that: The sidewalls of the groove (70) are inclined.

3. The spiral structure at the top of a four-ring spring punch as described in claim 2, characterized in that: The oil ring groove (10) is provided with an oil drain port (12), which is connected to the oil injection channel (11).

4. The spiral structure at the top of a four-ring spring punch as described in claim 2 or 3, characterized in that: The oil injection ring (2) has several sets of oil injection through holes (20) that can be connected to the oil drain port (12) in the circumferential direction.

5. The spiral structure at the top of a four-ring spring punch as described in claim 1, characterized in that: The injection ring (2) has a break line (22) on its surface, so that the entire injection ring (2) forms a discontinuous ring structure.

6. The spiral structure at the top of a four-ring spring punch as described in claim 5, characterized in that: A first steel ring (3), at least one copper ring (4), and a second steel ring (5) are sequentially fitted on the outer circumference of the ring seat (1) from the end away from the connector (6) to the connector (6).

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