Universal injection mold for multi-standard diaphragm valve

Abstract

The invention discloses a universal injection mold for multi-standard diaphragm valves, and relates to the technical field of injection molds, the universal injection mold comprises a diaphragm valve mold, the diaphragm valve mold comprises a diaphragm valve steel part, a starting disc cavity and a runner cavity are formed in the diaphragm valve steel part, and a starting disc core is arranged in the starting disc cavity; a cavity opening of the runner cavity is provided with a clamping cover, a runner core is arranged in the runner cavity, the runner core is sleeved with the clamping cover in a sealing mode, the runner core is connected with a clamping mechanism, the clamping cover is connected with the clamping mechanism through an adjusting device, and the clamping mechanism is arranged between the static mold bottom plate and the movable mold bottom plate; a feeding nozzle is arranged on the static mold bottom plate; and a starting disc top plate which is in sealing fit with the diaphragm valve steel part is arranged on the bottom surface of the movable mold bottom plate. The mold can be universally used for standard diaphragm valves with the same specification and different full-length requirements, the mold development cost is reduced, the mold does not need to be frequently replaced in the working process, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a universal injection mold for multi-standard diaphragm valves. Background Art

[0002] The injection mold of the diaphragm valve is a mold used to wrap a layer of plastic lining in the inner cavity of the diaphragm valve steel part. For the same specification of diaphragm valves, there are different connection standard requirements in different countries and regions, that is, the full length requirements of diaphragm valves of the same specification and different standards are also different. For example, the diameter of the flow channel core of the national standard DN50 fluorine-lined diaphragm valve and the Japanese standard 50A fluorine-lined diaphragm valve is 50mm, but the national standard DN50 flange waterline diameter is 102, the valve full length is 210, and the Japanese standard 50A flange waterline diameter is 96, and the valve full length is 197.

[0003] When using existing diaphragm valve injection molds, diaphragm valves with the same specifications but different full-length requirements usually need to be re-molded, which has high development costs and requires frequent mold changes during injection molding, greatly reducing production efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a universal injection mold for multi-standard diaphragm valves, so as to solve the problems mentioned in the background technology that the existing diaphragm valve injection mold needs to be re-molded when using diaphragm valves of the same specification but different full length requirements, which increases the cost; and the mold needs to be frequently replaced during injection molding, which greatly reduces the production efficiency.

[0005] The present invention adopts the following technical solution:

[0006] The present invention discloses a universal injection mold for a multi-standard diaphragm valve, comprising a diaphragm valve mold, wherein the diaphragm valve mold comprises a diaphragm valve steel part, wherein a start-up disk cavity and a flow channel cavity communicating with the start-up disk cavity are arranged in the diaphragm valve steel part, wherein a start-up disk core is arranged in the start-up disk cavity, wherein a flow channel core is arranged in the flow channel cavity, wherein clamping covers are arranged at positions at both ends of the diaphragm valve steel part corresponding to the flow channel cavity, wherein the flow channel core is connected to a clamping mechanism, wherein a sealing sleeve of the clamping cover is arranged on the flow channel core, wherein the clamping cover is connected to the clamping mechanism through an adjusting device, and wherein the clamping mechanism is arranged between a static mold bottom plate and a dynamic mold bottom plate;

[0007] A feed nozzle is provided on the static mold bottom plate, and the feed nozzle is connected to the bottom injection port of the diaphragm valve steel part;

[0008] The starting disk core is fixed to the bottom of the starting disk top plate, the starting disk top plate is fixedly connected to the bottom of the movable mold bottom plate, and the bottom surface of the starting disk top plate is sealed and matched with the diaphragm valve steel part.

[0009] Furthermore, the clamping mechanism includes a slider, which is slidably connected to the movable mold bottom plate; the clamping cover is connected to the slider through the adjusting device; and the runner core is detachably connected to the slider.

[0010] Further, the adjusting device is a bolt, the adjusting device is threadedly connected to the slider, the adjusting device passes through the slider, and the threaded end of the adjusting device is in abutment with the clamping cover;

[0011] The slider is fixedly connected to the movable end of the external cylinder, and the slider is slidably connected to the slide groove, and the slide groove is arranged at the bottom of the movable mold bottom plate.

[0012] Furthermore, the clamping mechanism also includes a limit block, which is fixedly connected to the static mold bottom plate, and is located on the side of the slider away from the diaphragm valve steel part, and the limit block cooperates with the slider in limiting position.

[0013] Furthermore, the surfaces of the limit block in contact with the sliding block are both configured as inclined surfaces.

[0014] Furthermore, an ejection assembly is provided on the top of the movable mold bottom plate, and the ejection assembly cooperates with the top ejection of the diaphragm valve steel part.

[0015] Further, the ejector assembly includes two side plates arranged in parallel, the two side plates are fixedly connected to the movable mold bottom plate, an ejector bottom plate is fixedly connected above the two side plates, a plurality of guide slides are arranged between the ejector bottom plate and the movable mold bottom plate, a spring is sleeved on the outer side of the guide slide, one end of the spring is against the movable mold bottom plate, and the other end of the spring is against the push plate;

[0016] The push plate is provided with an ejector rod on one side facing the movable mold bottom plate, and the lower end of the ejector rod is pressed and matched with the diaphragm valve steel part;

[0017] The ejection bottom plate is provided with a through ejection hole, and the ejection hole is located above the ejection plate.

[0018] Furthermore, a pad is provided at the center position of the static mold bottom plate, the pad is padded under the diaphragm valve steel part, the pad is provided with the feed nozzle which passes through it, and the discharge port of the feed nozzle is higher than the pad; static mold positioning holes are provided around the static mold bottom plate, static mold positioning columns are fixedly connected to corresponding positions around the dynamic mold bottom plate, and the static mold positioning columns are slidably connected to the static mold positioning holes.

[0019] Furthermore, a positioning protrusion is provided on the top plate of the starting disk, and a positioning hole is provided on the diaphragm valve steel part, and the positioning protrusion is embedded and matched with the positioning hole.

[0020] Compared with the prior art, the beneficial technical effects of the present invention are:

[0021] The multi-standard diaphragm valve injection mold provided by the present invention can be used for diaphragm valves of the same specification but with different full length requirements, thereby reducing the mold development cost, eliminating the need for frequent mold replacement during work, and improving work efficiency. In addition, the mold can effectively reduce the injection pressure, increase the injection yield rate, and improve practicality.

[0022] Specifically, this mold connects the clamping cover and the slider with an adjusting device. When faced with diaphragm valve steel parts of the same specification but different full-length requirements, there is no need to replace the flow channel core and the starting disk core. The clamping cover can be adjusted to the appropriate position by screwing the adjusting device, which saves the mold opening cost of the injection mold and reduces the time for replacing and installing the mold, thereby improving production efficiency and practicality.

[0023] In addition, in the present invention, the cushion block presses against the diaphragm valve steel part during injection molding, which can prevent the mold from being pushed open due to excessive pressure during injection molding. At the same time, it is beneficial to reduce the pressure on the diaphragm valve steel part during injection molding, thereby preventing the diaphragm valve steel part from being deformed due to excessive injection molding pressure. The feed nozzle in the mold is higher than the cushion block and embedded in the diaphragm valve steel part, which can effectively reduce material leakage during injection molding and improve the utilization rate of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 Schematic diagram of the universal injection mold structure of the multi-standard diaphragm valve of the present invention Figure 1 ;

[0026] Figure 2 Schematic diagram of the universal injection mold structure of the multi-standard diaphragm valve of the present invention Figure 2 ;

[0027] Figure 3 It is a schematic diagram of the structure of a diaphragm valve mold in a universal injection mold for multi-standard diaphragm valves of the present invention;

[0028] Figure 4 It is a cross-sectional view of a diaphragm valve mold in a universal injection mold for multi-standard diaphragm valves of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the starter plate core and the flow channel core in the universal injection mold of the multi-standard diaphragm valve of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the start-up disk core, the positioning protrusion and the start-up disk top plate in the universal injection mold of the multi-standard diaphragm valve of the present invention;

[0031] Figure 7It is a schematic diagram of the flow channel core structure in the universal injection mold for multi-standard diaphragm valves of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the static mold bottom plate in the universal injection mold for multi-standard diaphragm valves of the present invention;

[0033] Fig. 9 It is a cross-sectional view of the static mold bottom plate in the universal injection mold for multi-standard diaphragm valves of the present invention;

[0034] Fig.10 It is a schematic diagram of the clamping cover structure in the universal injection mold for multi-standard diaphragm valves of the present invention;

[0035] Fig.11 It is a schematic diagram of the structure of the ejector assembly in the universal injection mold for multi-standard diaphragm valves of the present invention;

[0036] Fig.12 It is a schematic diagram of the structure of the ejector assembly and the clamping mechanism in the universal injection mold for multi-standard diaphragm valves of the present invention;

[0037] Fig.13 It is a cross-sectional view of an ejector assembly in a universal injection mold for multi-standard diaphragm valves of the present invention;

[0038] Fig.14 This is a diagram showing the installation and use of the universal injection mold for multi-standard diaphragm valves of the present invention.

[0039] Description of the accompanying drawings: 1, movable mold base plate; 2, static mold base plate; 2-1, feed nozzle; 2-2, static mold positioning hole; 2-3, cushion block; 2-4, feed nozzle; 3, diaphragm valve mold; 3-1, diaphragm valve steel part; 3-2, flow channel cavity; 3-3, starter disk cavity; 3-4, clamping cover; 3-4-1, annular convex edge; 3-4-2, concave surface; 3-5, flow channel core; 3-6, starter disk core; 4, clamping mechanism; 4-1, slider; 4- 2. Adjustment device; 4-3. Slide groove; 4-4. Limit block; 5. Ejector assembly; 5-1. Side plate; 5-2. Ejector bottom plate; 5-3. Guide slide rod; 5-4. Spring; 5-5. Push plate; 5-6. Ejector rod; 5-7. Ejector through hole; 5-8. Ejector hole; 6. Plastic lining; 7. Starter plate top plate; 7-1. Positioning protrusion; 7-2. Positioning hole; 8. Injection molding machine; 8-1. Injection molding tube of injection molding machine; 8-2. Ejector mechanism of injection molding machine. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] like Figures 1 to 3As shown, in this embodiment, a universal injection mold for multi-standard diaphragm valves is disclosed, including a diaphragm valve mold 3, the diaphragm valve mold 3 includes a diaphragm valve steel part 3-1, a start disk cavity 3-3 and a flow channel cavity 3-2 connected to the start disk cavity 3-3 are provided in the diaphragm valve steel part 3-1, a flow channel core 3-5 is provided in the flow channel cavity 3-2, and a start disk core 3-6 is provided in the start disk cavity 3-3. Clamping covers 3-4 are provided at the positions corresponding to the flow channel cavity 3-2 at both ends of the diaphragm valve steel part 3-1, two flow channel cores 3-5 are provided, and the two flow channel cores 3-5 are connected to the clamping mechanism 4, the clamping cover 3-4 sealing sleeve is provided on the flow channel core 3-5, the clamping cover 3-4 is connected to the clamping mechanism 4 through the adjusting device 4-2, and the clamping mechanism 4 is provided between the static mold bottom plate 2 and the dynamic mold bottom plate 1, and the dynamic mold bottom plate 1 and the static mold bottom plate 2 are clamped on both sides of the diaphragm valve steel part 3-1.

[0042] A feed nozzle 2-1 is provided on the static mold bottom plate 2, and the feed nozzle 2-1 is connected to the bottom injection port of the diaphragm valve steel part 3-1.

[0043] The start-up disk core 3-6 is fixedly connected to the bottom of the start-up disk top plate 7, the start-up disk top plate 7 is fixedly connected to the bottom of the movable mold bottom plate 1, and the bottom surface of the start-up disk top plate 7 is sealed with the diaphragm valve steel part 3-1. A positioning protrusion 7-1 is provided on the start-up disk top plate 7, and a positioning hole 7-2 is provided on the diaphragm valve steel part 3-1, and the positioning protrusion 7-1 is embedded and matched with the positioning hole 7-2.

[0044] like Figure 2 and Fig.12 As shown, the clamping mechanism 4 includes a slider 4-1, which is arranged on the side of the clamping cover 3-4 away from the diaphragm valve steel part 3-1, and the slider 4-1 is slidably connected to the movable mold bottom plate 1. The clamping cover 3-4 is connected to the slider 4-1 through an adjustment device 4-2, and the flow channel core 3-5 is detachably connected to the slider 4-1.

[0045] In this embodiment, the adjusting device 4-2 is a bolt structure, the adjusting device 4-2 is threadedly connected to the slider 4-1, and after the adjusting device 4-2 passes through the slider 4-1, the threaded end of the adjusting device 4-2 abuts against the clamping cover 3-4.

[0046] In this embodiment, one end of the two flow channel cores 3-5 are respectively sealed and docked with the two sides of the starting disk core 3-6, and the two flow channel cores 3-5 are respectively sealed and slidably connected with the clamping cover 3-4, and the other ends of the two flow channel cores 3-5 are respectively disassembled and connected to the slider 4-1 through bolt assemblies.

[0047] The slider 4-1 is fixedly connected to the movable end of the external cylinder, and the slider 4-1 is slidably connected to the slide groove 4-3, and the slide groove 4-3 is arranged on the side of the movable mold bottom plate 1 facing the diaphragm valve steel part 3-1. During operation, firstly, the adjusting device 4-2 is screwed to adjust the spacing between the two clamping covers 3-4 to the widest, and the cylinder is ventilated to the open position so that the two sliders 4-1 are opened to the maximum distance, and then, the diaphragm valve steel part 3-1 is put in, and the flow channel core 3-5 is aligned with the flow channel cavity 3-2, the starting disk core 3-6 is inserted into the starting disk cavity 3-3, and the positioning protrusion 7-1 and the positioning hole 7-2 are embedded and matched to clamp the diaphragm valve steel part 3-1, and then the cylinder is ventilated to the closed position, and when the two sliders 4-1 are clamped toward the middle under the push of the cylinder, the two flow channel cores 3-5 are driven to be inserted into the flow channel cavity 3-2 and closed toward the starting disk core 3-6, and finally the two flow channel cores 3-5 and the starting disk core 3-6 are sealed and docked together, and then the adjusting device 4-2 is screwed according to the length of the diaphragm valve steel part 3-1, so that the clamping cover 3-4 and the cavity opening of the flow channel cavity 3-2 of the diaphragm valve steel part 3-1 are sealed and fitted together. Thus, the diaphragm valve steel part 3-1 is clamped and fixed by the flow channel core 3-5 and the clamping cover 3-4 on the left and right sides, the start plate top plate 7 on the upper side, and the start plate core 3-6. At the same time, a gap is left between the start plate core 3-6, the flow channel core 3-5 and the side wall of the diaphragm valve steel part 3-1 to leave space for injection molding. After the injection molding is completed, the plastic in the gap cools to form a plastic lining 6. Figure 4 As shown in , it is a schematic diagram of the structure of the diaphragm valve steel part 3-1 after injection molding.

[0048] like Figure 8 and Fig. 9 As shown, the clamping mechanism 4 also includes a limit block 4-4, which is fixedly connected to the static mold bottom plate 2. The limit block 4-4 is located at the maximum stroke of the slider 4-1 away from the diaphragm valve steel part 3-1. When the mold is closed, the limit block 4-4 cooperates with the slider 4-1 to prevent the slider 4-1 from being displaced due to excessive pressure during injection molding. In this embodiment, the contact surface of the limit block 4-4 and the slider 4-1 is set as an inclined surface. Because during injection molding, there will be flowing plastic inside the diaphragm valve steel part 3-1 acting on the clamping cover 3-4, thereby transmitting force to the slider 4-1, and the force of the plastic will be likely to be greater than the cylinder top tightening force, causing the slider 4-1 and the clamping cover 3-4 to produce a slight displacement. In order to prevent this from happening, the limit block 4-4 mechanically limits the maximum stroke position of the slider 4-1, thereby eliminating the possibility of the slider 4-1 and the clamping cover 3-4 being loose.

[0049] The movable mold bottom plate 1 is detachably connected to the static mold bottom plate 2. An ejection assembly 5 is provided on the side of the movable mold bottom plate 1 facing away from the static mold bottom plate 2. The ejection assembly 5 is ejected and matched with the diaphragm valve steel part 3-1.

[0050] like Figure 8 and Fig. 9As shown, a cushion block 2-3 is provided at the center of the static mold bottom plate 2, and the cushion block 2-3 is cushioned under the diaphragm valve steel part 3-1. At the same time, the cushion block 2-3 can also prevent the diaphragm valve steel part 3-1 from being deformed due to excessive injection pressure during injection molding. A through feed nozzle 2-1 is provided inside the cushion block 2-3, and the feed nozzle 2-1 is connected to the injection molding port of the diaphragm valve steel part 3-1. The discharge port of the feed nozzle 2-1 is higher than the cushion block 2-3. The feed nozzle 2-1 is connected to the injection molding port of the diaphragm valve steel part 3-1 to reduce material leakage. During injection molding, the material is fed from the feed nozzle 2-1.

[0051] Static mold positioning holes 2-2 are arranged around the static mold bottom plate 2, and static mold positioning columns 1-5 are fixedly connected to the corresponding positions around the dynamic mold bottom plate 1, and the static mold positioning columns 1-5 are slidably connected to the static mold positioning holes 2-2. The side of the static mold bottom plate 2 facing away from the diaphragm valve steel part 3-1 is fixedly connected to the external injection molding machine 8, and the static mold positioning hole 2-2 is inserted into the static mold positioning column 1-5. Under the push of the injection molding machine 8, the dynamic mold bottom plate 1 and the diaphragm valve steel part 3-1 move toward the static mold bottom plate 2, and the cushion block 2-3 and the feed nozzle 2-1 are tightly pressed under the injection port of the diaphragm valve steel part 3-1. The feed nozzle 2-1 is connected to the injection tube 8-1 of the external injection molding machine for injection molding.

[0052] like Fig.10 As shown, an annular convex edge 3-4-1 is arranged on the circumference of the clamping cover 3-4, and the annular convex edge 3-4-1 encloses a concave surface 3-4-2, and the annular convex edge 3-4-1 is in sealing contact with the diaphragm valve steel part 3-1.

[0053] like Figures 11 to 13 As shown, the ejection assembly 5 includes two parallel side plates 5-1, the two side plates 5-1 are fixedly connected to the movable mold bottom plate 1, the ejection bottom plate 5-2 is fixedly connected above the two side plates 5-1, and a plurality of guide slides 5-3 are arranged between the ejection bottom plate 5-2 and the movable mold bottom plate 1. The outer side of the guide slide 5-3 is sleeved with a spring 5-4, one end of the spring 5-4 is against the movable mold bottom plate 1, and the other end of the spring 5-4 is against the push plate 5-5. In this embodiment, the guide slide 5-3 is slidably connected to the movable mold bottom plate 1, the guide slide 5-3 is fixedly connected to the push plate 5-5, and the push plate 5-5 is located between the ejection bottom plate 5-2 and the spring 5-4.

[0054] The push plate 5-5 is provided with an ejector rod 5-6 on one side facing the movable mold bottom plate 1. The ejector rod 5-6 is slidably matched with the ejector through hole 5-7. In this embodiment, the ejector through hole 5-7 penetrates the movable mold bottom plate 1 and the starter plate top plate 7 and contacts the diaphragm valve steel part 3-1. The ejector rod 5-6 passes through the ejector through hole 5-7 and presses against the diaphragm valve steel part 3-1. In this embodiment, four guide rods 5-3 and four ejector rods 5-6 are provided.

[0055] In this embodiment, the ejector bottom plate 5-2 is connected to the injection molding machine 8 through a pressure plate on the side facing away from the diaphragm valve steel part 3-1. A through ejection hole 5-8 is provided on the ejector bottom plate 5-2, and the ejection hole 5-8 is located above the push plate 5-5. The injection molding machine 8 is provided with an injection molding machine ejector mechanism 8-2. When it is necessary to unload the diaphragm valve steel part 3-1 after injection molding, first, the movable mold bottom plate 1 is moved away from the static mold bottom plate 2, and then the slide block 4-1 is pulled apart by the cylinder to remove the flow channel core 3-5 and the clamping cover 3-4. Then, the movable end of the injection molding machine ejector mechanism 8-2 passes through the ejection hole 5-8 and can push the push plate 5-5 to move toward the diaphragm valve steel part 3-1. The push plate 5-5 -5 slides in the movable mold bottom plate 1, and the push plate 5-5 compresses the spring 5-4 when sliding. At the same time, the push plate 5-5 drives the ejector rod 5-6 to slide out from the ejector through hole 5-7 and eject the diaphragm valve steel part 3-1 after injection molding, and unloads the diaphragm valve steel part 3-1 after injection molding. After unloading, the ejection mechanism 8-2 of the injection molding machine is reset, and the push plate 5-5 and the ejector rod 5-6 are reset by the elastic force of the spring 5-4.

[0056] like Fig.13 As shown, in this embodiment, the push plate 5-5 is a double-layer plate structure fixedly connected together, and the ejector rod 5-6 is fixedly connected in the double-layer plate structure. The ejector rod 5-6 and the double-layer plate structure of the push plate 5-5 are both detachably connected to facilitate mold maintenance, accessory replacement and cost saving.

[0057] like Figures 1 to 14 As shown, the working process of the present invention is as follows:

[0058] First, the side of the static mold bottom plate 2 facing away from the diaphragm valve steel part 3-1 and the side of the ejection bottom plate 5-2 facing away from the diaphragm valve steel part 3-1 are fixed to the injection molding machine 8 through the pressure plate, the adjusting device 4-2 is screwed to adjust the spacing between the two clamping covers 3-4 to the widest, the cylinder is ventilated to the open position, so that the two sliders 4-1 are opened to the maximum distance, and then the diaphragm valve steel part 3-1 is inserted, the starting disk of the diaphragm valve steel part 3-1 is aligned with the starting disk top plate 7, the positioning hole 7-2 of the diaphragm valve steel part 3-1 is aligned with the positioning protrusion 7-1 for installation, and the flow channel core 3-5 is aligned with the flow channel cavity 3-2, the starting disk core 3-6 is inserted into the starting disk cavity 3-3, and the positioning protrusion 7-1 is embedded and matched with the positioning hole 7-2. The positioning protrusion 7-1 can effectively fix the diaphragm valve steel part 3-1 to ensure that the diaphragm valve steel part 3-1 will not be offset during injection molding. Then the cylinder is ventilated to the closed position, the cylinder pushes out the slider 4-1 and then drives the clamping cover 3-4 to push out, the flow channel core 3-5 is inserted into the flow channel cavity 3-2 and closes toward the start disk core 3-6 until the two flow channel cores 3-5 are sealed and docked with the start disk core 3-6. According to the length of the diaphragm valve steel part 3-1, the adjusting device 4-2 is screwed so that the clamping cover 3-4 and the flow channel cavity 3-2 of the diaphragm valve steel part 3-1 are sealed and clamped at both ends of the diaphragm valve steel part 3-1.

[0059] Then, the injection molding machine 8 on one side of the static mold base plate 2 is stationary, and the injection molding machine 8 on the side of the dynamic mold base plate 1 moves toward the static mold base plate 2 for mold closing. The static mold positioning column 1-5 on the dynamic mold base plate 1 is inserted into the static mold positioning hole 2-2 in the static mold base plate 2, and under the push of the injection molding machine 8, the diaphragm valve steel part 3-1 moves toward the static mold base plate 2, and the limit blocks 4-4 are stuck on both sides of the slider 4-1 to prevent the slider 4-1 from slipping. After the mold closing is completed, ensure that the cushion block 2-3 completely supports the diaphragm valve steel part 3-1, and the feed nozzle 2-1 is aligned and connected with the injection port of the diaphragm valve steel part 3-1.

[0060] Then, the injection molding machine 8 injects the molten plastic through the feed nozzle 2-1, and covers the plastic lining 6 on the inner side of the diaphragm valve steel part 3-1. After the plastic lining 6 cools down, the mold is opened. The injection molding machine 8 first moves the movable mold base plate 1 out to separate it from the static mold base plate 2, and then uses the cylinder to pull the slider 4-1 apart to remove the flow channel core 3-5 and the clamping cover 3-4. After that, the push plate 5-5 is pushed toward the diaphragm valve steel part 3-1 by the ejection mechanism 8-2 of the injection molding machine, and the ejection rod 5-6 is driven by the push plate 5-5 to move and eject. Under the pushing action of the ejection rod 5-6, the positioning protrusion 7-1 is separated from the positioning hole 7-2, and the diaphragm valve steel part 3-1 can be separated after the injection molding is completed. Then the ejection mechanism 8-2 of the injection molding machine is reset, and the push plate 5-5 is reset by the elastic force of the spring 5-4, completing an injection molding process.

[0061] The dimensions of the diaphragm valve flow channel and the start disk are fixed dimensions when the valve is designed, and this dimension is only related to the difference in specifications. According to the standard, it only affects the flange connection size and the overall length of the valve, and the flow channel core under the same specification is a fixed required size. For example: the flow channel core of the fluorine-lined diaphragm valve of the national standard DN50 and the fluorine-lined diaphragm valve of the Japanese standard 50A are both 50mm in diameter, but the flange waterline diameter of the national standard DN50 is 102 and the overall length of the valve is 210, while the flange waterline diameter of the Japanese standard 50A is 96 and the overall length of the valve is 197. Therefore, the present invention can adjust the clamping cover 3-4 to a suitable position for the diaphragm valve steel part 3-1 of the same specification but different overall length requirements by screwing the adjustment device 4-2 to achieve different overall length requirements.

[0062] It should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0063] The embodiments described above are only descriptions of the preferred modes 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 universal injection mold for a multi-standard diaphragm valve, comprising a diaphragm valve mold (3), the diaphragm valve mold (3) comprising a diaphragm valve steel part (3-1), the diaphragm valve steel part (3-1) being provided with a start-up disk cavity (3-3) and a flow channel cavity (3-2) communicating with the start-up disk cavity (3-3), the start-up disk cavity (3-3) being provided with a start-up disk core (3-6), the flow channel cavity (3-2) being provided with a flow channel core (3-5), and clamping covers (3-4) being provided at positions at both ends of the diaphragm valve steel part (3-1) corresponding to the flow channel cavity (3-2), characterized in that: The runner cores (3-5) are connected to the clamping mechanism (4), the clamping cover (3-4) is sealed and sleeved on the runner core (3-5), the clamping cover (3-4) is connected to the clamping mechanism (4) via an adjusting device (4-2), and the clamping mechanism (4) is arranged between the static mold bottom plate (2) and the dynamic mold bottom plate (1); A feed nozzle (2-1) is provided on the static mold bottom plate (2), and the feed nozzle (2-1) is connected to the bottom injection port of the diaphragm valve steel part (3-1); The starting disk core (3-6) is fixedly connected to the bottom of the starting disk top plate (7), the starting disk top plate (7) is fixedly connected to the bottom of the movable mold bottom plate (1), and the bottom surface of the starting disk top plate (7) is sealed and matched with the diaphragm valve steel part (3-1).

2. The universal injection mold for multi-standard diaphragm valves according to claim 1, characterized in that: The clamping mechanism (4) comprises a slider (4-1), and the slider (4-1) is slidably connected to the movable mold bottom plate (1); The clamping cover (3-4) is connected to the slider (4-1) via the adjusting device (4-2); The flow channel core (3-5) is detachably connected to the sliding block (4-1).

3. The universal injection mold for multi-standard diaphragm valves according to claim 2, characterized in that: The adjusting device (4-2) is a bolt, the adjusting device (4-2) is threadedly connected to the slider (4-1), the adjusting device (4-2) passes through the slider (4-1), and the threaded end of the adjusting device (4-2) is in contact with the clamping cover (3-4); The slider (4-1) is fixedly connected to the movable end of the external cylinder, the slider (4-1) is slidably connected to the slide groove (4-3), and the slide groove (4-3) is arranged at the bottom of the movable mold bottom plate (1).

4. The universal injection mold for multi-standard diaphragm valves according to claim 2, characterized in that: The clamping mechanism (4) further comprises a limit block (4-4), the limit block (4-4) being fixedly connected to the static mold bottom plate (2), the limit block (4-4) being located on the side of the slider (4-1) away from the diaphragm valve steel part (3-1), and the limit block (4-4) and the slider (4-1) being limited in cooperation.

5. The universal injection mold for multi-standard diaphragm valves according to claim 4, characterized in that: The surfaces of the limit block (4-4) in contact with the sliding block (4-1) are both arranged as inclined surfaces.

6. The universal injection mold for multi-standard diaphragm valves according to claim 1, characterized in that: An ejection assembly (5) is provided on the top of the movable mold bottom plate (1), and the ejection assembly (5) cooperates with the top ejection of the diaphragm valve steel part (3-1).

7. The universal injection mold for multi-standard diaphragm valves according to claim 6, characterized in that: The ejection assembly (5) comprises two side plates (5-1) arranged in parallel, the two side plates (5-1) are fixedly connected to the movable mold bottom plate (1), an ejection bottom plate (5-2) is fixedly connected above the two side plates (5-1), a plurality of guide slides (5-3) are arranged between the ejection bottom plate (5-2) and the movable mold bottom plate (1), a spring (5-4) is sleeved on the outer side of the guide slides (5-3), one end of the spring (5-4) abuts against the movable mold bottom plate (1), and the other end of the spring (5-4) abuts against the push plate (5-5); The push plate (5-5) is provided with an ejector rod (5-6) on one side facing the movable mold bottom plate (1), and the lower end of the ejector rod (5-6) is pressed and matched with the diaphragm valve steel part (3-1); The ejection bottom plate (5-2) is provided with a through ejection hole (5-8), and the ejection hole (5-8) is located above the ejection plate (5-5).

8. The universal injection mold for multi-standard diaphragm valves according to claim 1, characterized in that: A cushion block (2-3) is arranged at the center of the static mold bottom plate (2), the cushion block (2-3) is cushioned below the diaphragm valve steel part (3-1), a feed nozzle (2-1) is arranged through the cushion block (2-3), and the discharge port of the feed nozzle (2-1) is higher than the cushion block (2-3); Static mold positioning holes (2-2) are arranged around the static mold base plate (2), and static mold positioning columns (1-5) are fixedly connected to corresponding positions around the dynamic mold base plate (1), and the static mold positioning columns (1-5) are slidably connected to the static mold positioning holes (2-2).

9. The universal injection mold for multi-standard diaphragm valves according to claim 1, characterized in that: A positioning protrusion (7-1) is provided on the starting disk top plate (7), and a positioning hole (7-2) is provided on the diaphragm valve steel part (3-1), and the positioning protrusion (7-1) is embedded and matched with the positioning hole (7-2).

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