Control method and device for preventing layer mixing of outer circle of seat ring

Abstract

The invention provides a control method for preventing layer mixing of the outer circle of a seat ring. The control method comprises the following steps that a first cavity used for being filled with a lower layer material is formed in the inner wall of the top of a formwork; the first cavity is filled with a lower layer material; driving the mold frame to move up and down for at least one motion period, and forming a second cavity for filling an upper layer material on the inner wall of the top of the mold frame; the method comprises the steps that according to the size of the lower layer of the seat ring, the mold frame is driven by a filling air cylinder to move upwards till the top face of the mold frame is higher than the top face of a lower pressing head, and the space formed by the inner top of the mold frame and the top of the lower pressing head forms the first cavity; according to the invention, the mold frame shaking function is added, specifically after the lower layer material is filled and before the upper layer material is filled, the mold frame is quickly lifted and quickly dropped by utilizing the arranged mold frame shaking cylinder, so that lower layer material powder on the inner wall of the mold frame is shaken off, and the problem of layer mixing on the outer circle of a product during subsequent upper layer material filling is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of valve seat ring production, and in particular to a control method and device for preventing the outer circle of a seat ring from mixing layers. Background Art

[0002] The valve seat is one of the core components of the engine's valve train. It is used to seal the combustion chamber in conjunction with the valve. It needs to withstand frequent impacts of the valve under high temperature and high stress conditions. It needs to have good wear resistance and heat resistance to prevent poor sealing due to excessive wear. With the application of emerging technologies and clean fuels, the ambient temperature and load of the valve seat are getting higher and higher, and the lubrication conditions are getting worse and worse.

[0003] When the press machine produces double-layer seat rings, some products have thin walls, and the powder of the lower layer material is easy to remain on the inner wall of the tire mold. This will cause the outer ring of the product to be mixed, that is, the powder of the lower layer material is easy to mix into the outer cylindrical surface of the upper layer material, affecting the quality of the outer cylindrical surface of the upper layer material, and then affecting the molding effect of the entire product. Summary of the invention

[0004] The present invention provides a control method and device for preventing mixed layers on the outer circle of the seat ring, by adding a shaking function of the mold frame to shake off the powder material remaining on the inner wall of the mold frame when filling the lower layer material, thereby avoiding the formation of mixed layers on the outer circle of the seat ring.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A control method for preventing the outer circle of a race from mixing layers comprises the following steps:

[0007] A first chamber for filling the lower layer material is formed on the inner wall of the top of the mold frame;

[0008] Filling the first chamber with a lower layer of material;

[0009] The mold frame is driven to move up and down for at least one movement cycle, and a second chamber for filling the upper layer material is formed on the inner wall of the top of the mold frame;

[0010] The second chamber is filled with the upper layer material.

[0011] Preferably, the first chamber formed on the inner wall of the top of the mold frame for filling the lower layer material comprises:

[0012] According to the size of the lower layer of the seat ring, the mold frame is driven upward by the filling cylinder to make the top surface of the mold frame higher than the top surface of the lower pressure head. The space formed by the top of the mold frame and the top of the lower pressure head constitutes the first chamber.

[0013] Preferably, the filling of the lower layer material in the first chamber comprises:

[0014] The lower layer material is filled into the first cavity by a press, and the top surface of the lower layer material is made flush with the top surface of the mold frame.

[0015] Preferably, the driving mold frame moves up and down for at least one movement cycle, and a second chamber for filling the upper layer material is formed on the inner wall of the top of the mold frame, which includes:

[0016] The mold frame shaking cylinder is ventilated to quickly lift the mold frame, and after the mold frame shaking cylinder is deflated, the mold frame falls down quickly;

[0017] Repeat the above-mentioned lifting and lowering of the mold frame for at least one movement cycle;

[0018] The filling cylinder drives the mold frame to move upward until the top surface of the mold frame is higher than the top surface of the lower layer material, and the space formed by the top of the mold frame and the top of the lower layer material constitutes the second chamber.

[0019] Preferably, the filling of the upper layer material in the second chamber comprises:

[0020] The second cavity is filled with the upper layer material by a press, and the top surface of the upper layer material is made flush with the top surface of the mold frame.

[0021] A device for preventing outer circle mixing of seat rings comprises a pressing head and a mold frame, wherein the mold frame comprises a core shaft axially penetrating the pressing head and a tire mold fitted on the outer side of the pressing head and capable of axial displacement along the pressing head together with the core shaft.

[0022] Preferably, the device for preventing the outer circle of the seat ring from mixing layers also includes a mold frame shaking cylinder for driving the mold frame to vertically displace, and a filling cylinder for driving the mold frame to axially displace along the lower pressure head.

[0023] Preferably, when the filling cylinder drives the mold frame to move upward so that the top surface of the mold frame is higher than the top surface of the lower pressure head, the space between the top of the mold frame and the top of the lower pressure head forms a first chamber.

[0024] Preferably, when the filling cylinder drives the mold frame to move upward so that the top surface of the mold frame is higher than the top surface of the lower layer material, the space between the top of the mold frame and the top of the lower layer material forms a second chamber.

[0025] It can be seen from the above technical scheme that the present invention has the following beneficial effects: In the present invention, by adding a mold frame shaking function, specifically after the lower layer material is filled and before the upper layer material is filled, the mold frame is quickly lifted and quickly dropped by using the set mold frame shaking cylinder, so as to shake off the lower layer material powder on the inner wall of the mold frame, thereby avoiding the problem of mixed layers on the outer circle of the product when the upper layer material is subsequently filled; specifically, when realizing the mold frame shaking function, air is ventilated to the mold frame shaking cylinder, and the mold frame shaking cylinder at this time acts to quickly lift the mold frame, and then the mold frame shaking cylinder is deflated, and the mold frame at this time quickly drops, thereby realizing the shaking function of the mold frame through the process of quickly lifting and dropping the mold frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A flow chart of the method provided by the present invention;

[0027] Figure 2 It is a schematic diagram of the present invention.

[0028] In the figure: 10, lower pressure head; 210, core shaft; 220, tire mold; 30, mold frame shaking cylinder; 40, filling cylinder; 50, first chamber; 60, lower layer material; 70, second chamber; 80, upper layer material. DETAILED DESCRIPTION

[0029] A preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0030] To achieve the above purpose, the embodiment of the present invention adopts the following technical solution: Figure 1 , a control method for preventing the outer circle of the race from mixing layers, comprising the following steps:

[0031] S10: forming a first cavity for filling the lower layer material on the inner wall of the top of the mold frame.

[0032] Specifically, when the press is producing a double-layer material seat ring, the lower layer of the seat ring must be formed first, so the lower layer material must be filled into the mold frame first. At this time, the mold frame must be moved to form a first cavity on the top inner wall of the mold frame. The first cavity can be used to fill the lower layer material, thereby facilitating the preparation of the lower layer of the seat ring by the press.

[0033] S20: Filling the first chamber with the lower layer material.

[0034] Specifically, after the aforementioned first cavity is formed by the movement of the mold frame, the lower layer material is filled into the first cavity by a press.

[0035] S30: driving the mold frame to move up and down for at least one movement cycle, and forming a second cavity for filling the upper layer material on the inner wall of the top of the mold frame.

[0036] Specifically, after the lower layer material is filled, the mold frame is driven to move up and down for at least one movement cycle, that is, the mold frame is driven to be quickly lifted up and then quickly dropped, so as to shake off the powder of the lower layer material on the inner wall of the mold frame, thereby realizing the shaking function of the mold frame, and avoiding the outer layer mixing of the product when the upper layer material is subsequently filled;

[0037] After the lower layer of material on the inner wall of the mold frame is shaken off, the mold frame is further driven to form a second chamber on the inner wall of the top of the mold frame, and the second chamber is used to fill the upper layer of material.

[0038] S40: Filling the second chamber with the upper layer material.

[0039] Specifically, after the second cavity is formed, the upper layer material is filled into the second cavity through a press, thereby achieving the filling of the double layer material of the seat ring.

[0040] The present invention increases the function of shaking the mold frame, specifically, after the lower layer material is filled and before the upper layer material is filled, the mold frame is driven to move up and down for at least one movement cycle, that is, the mold frame is quickly lifted and quickly dropped for at least one movement process, so as to shake off the powder of the lower layer material on the inner wall of the mold frame, thereby avoiding the problem of mixed layers of the outer circle of the product due to the product structure.

[0041] As a preferred technical solution of this embodiment, the first chamber for filling the lower layer material is formed on the inner wall of the top of the mold frame, including:

[0042] S110: According to the size of the lower layer of the seat ring, the mold frame is driven to move upward by the filling cylinder until the top surface of the mold frame is higher than the top surface of the lower pressure head, and the space formed by the top of the mold frame and the top of the lower pressure head constitutes the first chamber.

[0043] Specifically, considering that the seat ring is divided into two layers, when the lower layer material is filled inside the mold frame, based on the size of the lower layer of the seat ring, the filling cylinder is used to drive the mold frame upward so that its top surface is higher than the top surface of the lower pressure head. In this way, the top of the mold frame, the top of the lower pressure head and the outer wall of the core shaft form a first chamber, which can be used to fill the lower layer material.

[0044] Further, the filling of the lower layer material in the first chamber comprises:

[0045] S210: Fill the first cavity with the lower layer material by a press, and make the top surface of the lower layer material flush with the top surface of the mold frame.

[0046] Specifically, after the aforementioned first cavity is formed, the lower layer material is filled into the first cavity through the action of the press, and the top surface of the lower layer material is made flush with the top surface of the mold frame, that is, the lower layer material is ensured to fill the first cavity to improve the molding quality when forming the lower layer of the seat ring.

[0047] As a preferred technical solution of this embodiment, the driving mold frame moves up and down for at least one movement cycle, and a second chamber for filling the upper layer material is formed on the inner wall of the top of the mold frame, including:

[0048] S310: The mold frame shaking cylinder is ventilated to quickly lift the mold frame. After the mold frame shaking cylinder is deflated, the mold frame falls down quickly.

[0049] Specifically, after the lower layer of material is filled and before the upper layer of material is filled, the mold frame shaking cylinder is used for ventilation. At this time, the mold frame shaking cylinder is actuated to quickly lift the mold frame. Then, the mold frame shaking cylinder is used to deflate. At this time, the mold frame falls down quickly. Thus, the process of quickly lifting and falling the mold frame can be used to achieve the shaking effect of the mold frame, thereby avoiding the formation of mixed layers on the outer circle of the seat ring.

[0050] S320: Repeat the above-mentioned lifting and lowering of the mold frame for at least one movement cycle.

[0051] Specifically, the aforementioned function of realizing the shaking of the mold frame is achieved by utilizing the mold frame shaking cylinder to drive the mold frame to quickly lift up and quickly drop down. Therefore, in order to improve the shaking effect, the aforementioned cycle of rapid lifting and rapid dropping is repeated at least once, that is, the shaking effect can be achieved through a single process of rapid lifting and rapid dropping, or through multiple processes of rapid lifting and rapid dropping. No excessive restrictions are made here.

[0052] S330: The filling cylinder drives the mold frame to move upward until the top surface of the mold frame is higher than the top surface of the lower layer material, and the space formed by the top of the mold frame and the top of the lower layer material constitutes a second chamber.

[0053] Specifically, after the shaking process of the mold frame is completed, the upper layer material needs to be filled. At this time, according to the upper layer size of the seat ring, the mold frame is driven upward by the filling cylinder to make the top surface of the mold frame higher than the top surface of the lower layer material. At this time, the top of the mold frame, the top of the lower layer material and the outer wall of the core shaft top form a second chamber, which is used to fill the upper layer material.

[0054] Further, the filling of the upper layer material in the second chamber comprises:

[0055] S410: Fill the second cavity with an upper layer of material through a press, and make the top surface of the upper layer of material flush with the top surface of the mold frame.

[0056] Specifically, after the aforementioned second cavity is formed, the upper layer material is filled into the second cavity through the action of the press, and the top surface of the upper layer material is made flush with the top surface of the mold frame, that is, the upper layer material is ensured to fill the second cavity to improve the molding quality when forming the upper layer of the seat ring.

[0057] Further references Figure 2 The present invention also provides a device for preventing the outer circle of the seat ring from mixing layers, including a lower pressure head 10 and a mold frame. Furthermore, the mold frame includes a core shaft 210 and a tire mold 220. The core shaft 210 axially penetrates the lower pressure head 10, and the tire mold 220 is arranged on the outer side of the lower pressure head 10, and the tire mold can be displaced along the axial direction of the lower pressure head 10 together with the core shaft 210. Since the tire mold 220 and the core shaft 210 in the present invention can be displaced relative to the lower pressure head, the mold frame can be quickly lifted and quickly dropped relative to the lower pressure head. In this way, the shaking function of the mold frame can be realized, so as to shake off the lower layer material remaining on the inner wall of the mold frame when filling the lower layer material, so as to avoid the formation of mixed layers on the outer circle of the seat ring when filling the upper layer material.

[0058] Furthermore, the device for preventing the outer circle of the seat ring from mixing layers also includes a mold frame shaking cylinder 30 and a filling cylinder 40. The mold frame shaking cylinder is used to drive the mold frame to vertically displace, that is, when the mold frame shaking function is realized, the mold frame shaking cylinder 30 can be ventilated, and the mold frame shaking cylinder can quickly lift the mold frame, and then after the mold frame shaking cylinder is deflated, the mold frame can be quickly dropped;

[0059] The filling cylinder is used to drive the mold frame to axially displace along the lower pressure head, that is, the filling cylinder 40 mainly serves the purpose of filling the layer material into the interior of the mold frame. Specifically, when filling the lower layer material, the filling cylinder is used to lift the mold frame until the top surface of the mold frame is higher than the top surface of the lower pressure head, so as to form a first cavity on the top of the mold frame, and the lower layer material is filled into the first cavity by a press; when filling the upper layer material, the filling cylinder is used to lift the mold frame until the top surface of the mold frame is higher than the top surface of the lower layer material, so as to form a second cavity on the top of the mold frame, and the upper layer material is filled into the second cavity by a press.

[0060] It should be noted that when the filling cylinder drives the mold frame to move so that the top surface of the mold frame is higher than the top surface of the lower pressure head, the space between the top of the mold frame, the top of the lower pressure head and the outer side wall of the top of the mandrel forms a first chamber;

[0061] Similarly, when the filling cylinder drives the mold frame to move upward so that the top surface of the mold frame is higher than the top surface of the lower layer material, the space between the top of the mold frame, the top of the lower layer material and the outer side wall of the core shaft top forms a second chamber.

[0062] The above-described embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A control method for preventing the outer circle of the race from mixing layers, characterized in that: The following steps are involved: A first chamber for filling the lower layer material is formed on the inner wall of the top of the mold frame; Filling the first chamber with a lower layer of material; The mold frame is driven to move up and down for at least one movement cycle, and a second chamber for filling the upper layer material is formed on the inner wall of the top of the mold frame; The second chamber is filled with the upper layer material.

2. The control method for preventing the outer circle of the race from mixing layers according to claim 1, characterized in that: The first chamber formed on the inner wall of the top of the mold frame for filling the lower layer material comprises: According to the size of the lower layer of the seat ring, the mold frame is driven upward by the filling cylinder to make the top surface of the mold frame higher than the top surface of the lower pressure head. The space formed by the top of the mold frame and the top of the lower pressure head constitutes the first chamber.

3. The control method for preventing the outer circle of the race from mixing layers according to claim 1, characterized in that: The filling of the lower layer material in the first chamber comprises: The lower layer material is filled into the first cavity by a press, and the top surface of the lower layer material is made flush with the top surface of the mold frame.

4. The control method for preventing the outer circle of the race from mixing layers according to claim 1, characterized in that: The driving mold frame moves up and down for at least one movement cycle, and forms a second chamber for filling the upper layer material on the inner wall of the top of the mold frame, which includes: The mold frame shaking cylinder is ventilated to quickly lift the mold frame, and after the mold frame shaking cylinder is deflated, the mold frame falls down quickly; Repeat the above-mentioned lifting and lowering of the mold frame for at least one movement cycle; The filling cylinder drives the mold frame to move upward until the top surface of the mold frame is higher than the top surface of the lower layer material, and the space formed by the top of the mold frame and the top of the lower layer material constitutes the second chamber.

5. The control method for preventing the outer circle of the race from mixing layers according to claim 4, characterized in that: The filling of the second chamber with the upper layer material comprises: The second cavity is filled with the upper layer material by a press, and the top surface of the upper layer material is made flush with the top surface of the mold frame.

6. A device for preventing the outer circle of the seat ring from mixing layers according to the control method according to any one of claims 1 to 5, comprising a lower pressure head (10) and a mold frame, characterized in that: The mold frame comprises a core shaft (210) axially penetrating the lower pressing head (10) and a tire mold (220) arranged on the outer side of the lower pressing head (10) and capable of axially displacing along the lower pressing head together with the core shaft (210).

7. The device for preventing outer circle mixing of the raceway according to claim 6, characterized in that: The device for preventing the outer circle of the seat ring from mixing layers also includes a mold frame shaking cylinder (30) for driving the mold frame to vertically displace, and a filling cylinder (40) for driving the mold frame to axially displace along the lower pressure head (10).

8. The device for preventing outer circle mixing of the race according to claim 7, characterized in that: When the filling cylinder (40) drives the mold frame to move upward so that the top surface of the mold frame is higher than the top surface of the lower pressure head (10), the space between the top of the mold frame and the top of the lower pressure head (10) forms a first chamber (50).

9. The device for preventing outer circle mixing of the raceway according to claim 8, characterized in that: When the filling cylinder (40) drives the mold frame to move upward so that the top surface of the mold frame is higher than the top surface of the lower layer material (60), the space between the top of the mold frame and the top of the lower layer material (60) forms a second chamber (70).

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