Water outlet valve body casting mold and forming process

Abstract

The application provides a water outlet valve body casting mold and a forming process. The main body part and the plane part can be integrally formed in the pouring process through the forming mold, and the problems of poor compatibility, easy deformation, thermal cracks, and porosity in the split welding of the prior art are improved. In addition, the product thickness is adjusted by changing the internal size of the valve body through hot extrusion forming, which provides technical support for producing ultra-thin products with a thickness of less than 8 mm. At the same time, high material density is realized through high-temperature extrusion, so that the strength and plasticity of the valve body are higher than those of the valve body manufactured by split welding, and the anti-freezing cracking ability and surface quality of the valve body in a low-temperature environment are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to valve body forming technical field, especially to a water outlet valve body casting mold and forming process. BACKGROUND

[0002] The main body and the plane part of the traditional water outlet valve body are formed respectively, and then the water outlet valve body is formed by welding, which leads to the problems of poor compatibility, easy deformation, thermal cracks and porosity in the production process. SUMMARY

[0003] In view of the problems in the background, the present application provides a water outlet valve body casting mold and forming process.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A water outlet valve body casting mold, the valve body includes a main body and a plane part, and includes an extrusion mold, the extrusion mold includes a movable mold and a fixed mold, the top of the fixed mold is provided with a first mold cavity matched with the plane part, and the side surface is provided with a second mold cavity matched with the main body of the valve body, and the first mold cavity and the second mold cavity are in communication.

[0006] Further, one side of the movable mold is provided with a first limiting block, and the extrusion mold further includes a baffle, when the movable mold is closed on the fixed mold, the first limiting block presses the baffle tightly on the main body in the second mold cavity.

[0007] Further, the outer side of the baffle is provided with a handle and a groove abutting against the first limiting block, and the second mold cavity is provided with a supporting part for placing the baffle.

[0008] Further, the extrusion mold further includes a base connected to the bottom of the fixed mold, and the base is provided with a second limiting block, so that the bottom of the main body abuts against the second limiting block during the hot extrusion of the valve body.

[0009] Further, the extrusion mold further includes a guide device, the guide device includes a first guide piece arranged on the bottom surface of the movable mold and a second guide piece arranged on the top surface of the fixed mold, and the first guide piece and the second guide piece are concave-convex movable matched when the fixed mold and the movable mold are closed.

[0010] Further, it further includes a forming mold, the forming mold includes an inner mold and an outer mold installed outside the inner mold, the inner mold is matched with the shape of the internal flow channel of the valve body, and the gap between the outer mold and the inner mold is matched with the wall thickness of the valve body.

[0011] A water outlet valve body forming process using a water outlet valve body casting mold, comprising the following steps:

[0012] S1, making a forming mold so that the main body part and the flat part can be integrally formed during pouring;

[0013] S2, pouring forming: adding molten material into the forming mold, and cooling to form a blank;

[0014] S3, grinding treatment: grinding the gate and the riser of the blank;

[0015] S4, confirming the extrusion amount: confirming the extrusion amount according to the inner cavity thickness of the flat part of the blank and the inner cavity thickness of the flat part of the finished product before extrusion, ensuring that the upper surface of the flat part of the blank is higher than the extrusion amount of the upper surface of the fixed mold;

[0016] S5, mold test: fixing the extrusion mold to the extrusion device, placing the valve body in the extrusion mold, and pressing the valve body through the baffle; starting the extrusion device and observing whether the extrusion process is smooth;

[0017] S6, heating: heating the flat part at a preset heating temperature, and taking out after the heating time meets the preset heating time;

[0018] S7, hot extrusion: placing the heated blank in the extrusion mold, extruding the blank at a preset pressure, and keeping pressure after extrusion is completed, and opening the mold to obtain a semi-finished product when the pressure holding time meets the preset pressure holding time;

[0019] S8, machining, polishing and electroplating treatment to obtain a valve body finished product.

[0020] Further, the extrusion device includes an upper lock plate and a lower lock plate, in the step S5, the moving die is fixedly connected to the upper lock plate, the base is fixedly connected to the lower lock plate, the fixed die is fixedly connected to the base, and the flat part and the main body part of the valve body are respectively placed in the first mold cavity and the second mold cavity.

[0021] Further, the preset heating temperature is 630-700 degrees Celsius, and the preset heating time is 120-150 seconds.

[0022] Further, the preset pressure is at least 1.0 MPa, and the pressure holding time is at least 5 seconds.

[0023] The beneficial effects of the present application are:

[0024] 1. The water outlet valve body casting mold provided by the application, through the setting of the extrusion mold, the first limiting block is arranged on the movable mold, the extrusion mold further comprises a baffle, when the movable mold is combined with the fixed mold, the first limiting block presses the baffle against the main body part in the second mold cavity, and then the flat part is pressed in the first mold cavity, so that the flat part is prevented from moving outward during the hot extrusion process, and the flat part is ensured to be extruded to the preset thickness.

[0025] 2. The water outlet valve body casting mold provided by the application, the second mold cavity is provided with a supporting part for placing the baffle, so that the baffle is prevented from being displaced downward when being pressed, and the flat part is prevented from being separated from the first mold cavity during the hot extrusion process

[0026] 3. The water outlet valve body forming process provided by the application, through the forming mold, the main body part and the flat part can be integrally formed during the pouring process, and the problems of poor compatibility, easy deformation, thermal cracks and porosity in the prior art of split welding are improved. In addition, the internal size of the valve body is changed by hot extrusion forming, so as to adjust the product thickness, thereby providing technical support for realizing the production of ultra-thin products with a thickness of less than 8 mm. At the same time, high temperature extrusion is used to realize high material density, so that the strength and plasticity of the valve body are higher than those of the valve body manufactured by split welding, and the anti-cracking ability and surface quality of the valve body in a low temperature environment are improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0028] Figure 1 It is a schematic diagram of the extrusion mold of the water outlet valve body casting mold of the application;

[0029] Figure 2 It is a schematic diagram of the valve body of the water outlet valve body casting mold of the application;

[0030] Figure 3 It is a grinding schematic diagram of the valve body of the water outlet valve body casting mold of the application;

[0031] Figure 4 It is an exploded view of the extrusion mold of the water outlet valve body casting mold of the application;

[0032] Figure 5 It is one of the mold closing schematic diagrams of the extrusion mold of the water outlet valve body casting mold of the application;

[0033] Figure 6Fig. 1 is a schematic view of a closing die of an extrusion die of a water outlet valve body casting die according to the present application;

[0034] Figure 7 Fig. 2 is a schematic view of an inner die of a water outlet valve body casting die according to the present application;

[0035] Figure 8 Fig. 3 is a schematic view of an outer die of a water outlet valve body casting die according to the present application;

[0036] Figure 9 Fig. 4 is a flow chart of a water outlet valve body forming process according to the present application.

[0037] In the drawings, 10, valve body; 101, flat portion; 102, main body portion; 103, gate; 201, movable die; 202, fixed die; 203, baffle; 204, base; 2011, first limiting block; 2021, first die cavity; 2022, second die cavity; 2023, support portion; 2031, handle; 2032, groove; 2041, second limiting block; 2051, first guide; 2052, second guide; 301, left inner die; 302, right inner die; 401, left outer die; 402, right outer die. DETAILED DESCRIPTION

[0038] The present application will be described in detail below. Figures 1-9 The present application will be described in detail below.

[0039] A water outlet valve body casting die, the valve body 10 comprising a main body portion 102 and a flat portion 101, comprising an extrusion die, the extrusion die comprising a movable die 201 and a fixed die 202, as shown, Figures 1-4 the top of the fixed die 202 is provided with a first die cavity 2021 adapted to the flat portion 101, and the side surface is provided with a second die cavity 2022 adapted to the main body portion 102 of the valve body 10, and the first die cavity 2021 and the second die cavity 2022 are in communication, so that the main body portion 102 and the flat portion 101 can be integrally formed during pouring.

[0040] In this embodiment, a first limiting block 2011 is provided on one side of the moving mold 201, and the extrusion mold also includes a baffle 203. When the moving mold 201 closes to the fixed mold 202, the first limiting block 2011 presses the baffle 203 against the main body 102 located in the second mold cavity 2022, thereby pressing the flat part 101 against the first mold cavity 2021 to prevent the flat part 101 from moving outward during hot extrusion and to ensure that the flat part 101 is extruded to a preset thickness. Furthermore, a groove 2032 that abuts against the first limiting block 2011 is provided on the outer side of the baffle 203. Specifically, the first limiting block 2011 and the groove 2032 have mutually compatible abutment surfaces. The second mold cavity 2022 is provided with a support part 2023 for placing the baffle 203 to prevent the baffle 203 from shifting downward when pressed, thus preventing the flat part 101 from detaching from the first mold cavity 2021 during hot extrusion. A handle 2031 is also provided on the outer side of the baffle 203.

[0041] In this embodiment, the extrusion mold also includes a base 204 connected to the bottom of the fixed mold 202. The base 204 is provided with a second limiting block 2041, so that during the hot extrusion process of the valve body 10, the bottom of the main body 102 abuts against the second limiting block 2041.

[0042] In this embodiment, the extrusion die further includes a guiding device, which includes a first guide member 2051 disposed on the bottom surface of the moving die 201 and a second guide member 2052 disposed on the top surface of the fixed die 202. The first guide member 2051 and the second guide member 2052 engage in a concave-convex movement when the fixed die 202 and the moving die 201 are closed. Specifically, the first guide member 2051 is a guide post, and the second guide member 2052 is a guide sleeve. During hot extrusion, when the moving die 201 and the fixed die 202 are closed, as shown... Figure 5 and Figure 6 As shown, the guide post is slidably inserted into the guide sleeve to ensure that the direction will not deviate when the moving mold 201 and the fixed mold 202 are closed.

[0043] In this embodiment, the molding die includes an inner mold and an outer mold installed outside the inner mold, such as... Figure 7 and Figure 8 As shown, the inner mold is adapted to the shape of the internal flow channel of the valve body 10, and the gap between the outer mold and the inner mold is adapted to the wall thickness of the valve body 10. Specifically, the inner mold includes a left inner mold 301 and a right inner mold 302, and the outer mold includes a left outer mold 401 and a right outer mold 402. The left inner mold 301 and the right inner mold 302 are respectively placed inside the left outer mold 401 and the right outer mold 402, and the left outer mold 401 and the right outer mold 402 are respectively provided with flow channels communicating with the cavity between the inner mold and the outer mold, and the outer mold is also provided with a casting port communicating with the flow channels.

[0044] A water outlet valve body molding process, using a water outlet valve body 10 casting mold, such as Figure 9 As shown, it includes the following steps:

[0045] S1, make a forming mold, so that the main body 102 and the plane part 101 can be integrally formed in the pouring process;

[0046] S2, pouring forming: add molten material into the forming mold, and cool to form after standing, to obtain a blank;

[0047] S3, grinding treatment: grinding the sprue 103 and the riser of the blank;

[0048] S4, confirm the extrusion amount: before extrusion, confirm the extrusion amount according to the inner cavity thickness of the plane part 101 of the blank and the inner cavity thickness of the plane part 101 of the finished product, ensure that the upper surface of the plane part 101 of the blank is higher than the extrusion amount of the upper surface of the fixed mold 202;

[0049] S5, mold test: fix the extrusion mold on the extrusion device, and place the valve body 10 in the extrusion mold, and press the valve body 10 through the baffle 203; start the extrusion device, and observe whether the extrusion process is smooth;

[0050] S6, heating: heat the plane part 101 at a preset heating temperature, and take out after the heating time meets the preset heating time;

[0051] S7, hot extrusion: place the heated blank in the extrusion mold, extrude the blank at a preset pressure, and after the extrusion is completed, carry out pressure maintaining, and when the pressure maintaining time meets the preset pressure maintaining time, open the mold to obtain a semi-finished product;

[0052] S8, after machining, polishing and electroplating treatment, the valve body 10 finished product is obtained.

[0053] Specifically, the extrusion device is an oil press, and the extrusion device includes an upper locking die and a lower locking die. In the above step S5, the moving die 201 is fixedly connected to the upper locking die, the base 204 is fixedly connected to the lower locking die, the fixed die 202 is fixedly connected to the base 204, and the plane part 101 and the main body 102 of the valve body 10 are respectively placed in the first mold cavity 2021 and the second mold cavity 2022. Wherein, the preset heating temperature is 630-700 degrees Celsius, and the preset heating time is 120-150; the preset pressure is at least 1.0MPa, and the pressure maintaining time is at least 5 seconds.

[0054] Taking the blank with the inner cavity thickness of the plane part 101 of 5mm as an example, which needs to be extruded to 2mm, the steps are as follows:

[0055] S1, develop a forming mold, so that the main body 102 and the plane part 101 can be integrally formed in the pouring process;

[0056] S2, pouring forming: add molten material into the forming mold, and cool to form after standing, to obtain a blank;

[0057] S3, grinding treatment: the step S2 obtains the blank surface existing several sprues 103 and risers, and the sprues 103 and risers are subjected to grinding treatment, as shown in Figure 3

[0058] S4, confirming the extrusion amount: the inner cavity thickness of the plane part 101 of the blank is 5mm, the inner cavity thickness of the plane part 101 of the finished product is 2mm, therefore, the extrusion amount is 3mm, and further the upper surface of the plane part 101 of the blank needs to be higher than the upper surface of the fixed die 202 by 3mm;

[0059] S5, mold closing test: the movable die 201 is fixedly connected to the upper locking die plate of the oil press, the base 204 is fixedly connected to the lower locking die plate of the oil press, and the fixed die 202 is fixedly connected to the base 204; the plane part 101 and the main body part 102 of the valve body 10 are respectively placed in the first mold cavity 2021 and the second mold cavity 2022 of the movable die 201, and the valve body 10 is pressed tightly in the movable die 201 through the baffle 203; the oil press is started, and whether the extrusion process is smooth is observed;

[0060] S6, heating: the valve body 10 is taken out, the upper surface of the plane part 101 of the valve body 10 is aligned on the refractory brick trolley, and the torch is turned on for heating; the heating duration is 120-150 seconds, and the heating temperature is controlled between 630-700 degrees Celsius;

[0061] S7, hot extrusion: the heated valve body 10 is placed in the movable die 201 according to the step S5, the oil press is started, the extrusion pressure is 1.0MPa, and after at least 5 seconds of pressure maintaining, the mold is opened, and the product is placed in the designated area for natural cooling, and then the product is loaded into the finished product trolley;

[0062] S8, machining, polishing and electroplating treatment are performed to obtain the finished water outlet valve body 10.

[0063] The above examples only illustrate the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.​

Claims

1. A casting mold for a water outlet valve body, the valve body comprising a main body and a planar part, characterized in that, The device includes an extrusion die, which comprises a moving die and a fixed die. The fixed die has a first cavity on its top that is adapted to the planar portion and a second cavity on its side that is adapted to the main body portion of the valve body, and the first cavity and the second cavity are connected. The moving die has a first limiting block on one side. The extrusion die also includes a baffle. The baffle has a handle and a groove on its outer side that abuts against the first limiting block. The second cavity has a support portion for placing the baffle. When the moving die is closed to the fixed die, the first limiting block presses the baffle against the main body portion located in the second cavity.

2. The water outlet valve body casting mold as described in claim 1, characterized in that, The extrusion die also includes a base connected to the bottom of the fixed die, and the base is provided with a second limiting block, so that during the hot extrusion of the valve body, the bottom of the main body abuts against the second limiting block.

3. The water outlet valve body casting mold as described in claim 2, characterized in that, The extrusion die also includes a guiding device, which includes a first guiding member disposed on the bottom surface of the moving die and a second guiding member disposed on the top surface of the fixed die. The first guiding member and the second guiding member are in a convex-concave engagement when the fixed die and the moving die are closed.

4. The water outlet valve body casting mold as described in claim 3, characterized in that, It also includes a molding die, which includes an inner mold and an outer mold installed outside the inner mold. The inner mold is adapted to the shape of the internal flow channel of the valve body, and the gap between the outer mold and the inner mold is adapted to the wall thickness of the valve body.

5. A water outlet valve body forming process, using a water outlet valve body casting mold as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. Make a molding mold so that the main body and the flat surface can be integrally formed during the casting process; S2, Casting and Molding: The molten material is added into the molding mold and allowed to cool and solidify to obtain a blank; S3. Grinding treatment: Grind the gate and riser of the blank. S4. Confirm the extrusion amount: Before extrusion, confirm the extrusion amount based on the inner cavity thickness of the flat part of the blank and the inner cavity thickness of the flat part of the finished product, and ensure that the upper surface of the flat part of the blank is higher than the upper surface of the fixed mold by the extrusion amount. S5. Mold Closure Test: Fix the extrusion mold to the extrusion device, place the valve body inside the extrusion mold, and press the valve body tightly with the baffle; start the extrusion device and observe whether the extrusion process is smooth; S6. Heating: The planar part is heated at a preset heating temperature, and removed after the heating time meets the preset heating time. S7. Hot extrusion: The heated blank is placed in the extrusion mold and extruded under a preset pressure. After extrusion, the pressure is held. When the holding time meets the preset holding time, the mold is opened to obtain a semi-finished product. S8. After machining, polishing and electroplating, the valve body is finished.

6. The water outlet valve body molding process as described in claim 5, characterized in that, The extrusion device includes an upper locking mold and a lower locking mold. In step S5, the moving mold is fixedly connected to the upper locking mold, the base is fixedly connected to the lower locking mold, the fixed mold is fixedly connected to the base, and the flat part and the main body of the valve body are respectively placed in the first mold cavity and the second mold cavity.

7. The water outlet valve body molding process as described in claim 5, characterized in that, In step S6, the preset heating temperature is 630-700 degrees Celsius, and the preset heating time is 120-150 seconds.

8. The water outlet valve body molding process as described in claim 5, characterized in that, In step S7, the preset pressure is at least 1.0 MPa, and the pressure holding time is at least 5 seconds.

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