Injection molding in-mold assembly mold for drip irrigation accessories
The modular mold design for dripper components integrates pipe and fitting cavities, using synchronized drive mechanisms to produce and assemble components in a single step, reducing costs and improving efficiency.
Patent Information
- Application Number
- CN202510647181.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2025-07-15
AI Technical Summary
In the production of existing drip irrigation accessories, the three-way pipe fittings and kits need to be assembled manually or automated equipment after being formed separately, resulting in high cost and low efficiency.
Design a drip irrigation accessories injection mold assembly mold, integrating the pipe fitting mold cavity and kit mold cavity, and realize synchronous molding and assembly of pipe fittings and kit through driving components, reducing manual or equipment intervention.
The in-mold assembly of pipe fittings and kits is realized, which reduces production costs, improves production efficiency, and reduces labor and equipment requirements.
Smart Images
Figure CN120307562A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of molds, and more specifically, it refers to an in-mold assembly mold for injection molding of drip irrigation fittings. Background Art
[0002] In the field of manufacturing drip irrigation system fittings, the assembly of tee pipe fittings and kits generally adopts a split production method. In the prior art, the tee pipe fittings and kits need to be formed by two sets of independent molds respectively, that is, the tee pipe fittings are manufactured separately by an injection molding process, while the supporting kits need to be produced by another set of molds. After molding, the tee pipe fittings and kits need to be assembled by manual or automated equipment. Each tee pipe fitting corresponds to two kits. For manual assembly, workers need to respectively sleeved the two kits onto the two joints of the tee pipe fitting, with low efficiency and high labor costs; although automated equipment can increase the assembly efficiency to a certain extent compared with manual work, it also brings an increase in equipment costs. Summary of the Invention
[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an in-mold assembly mold for injection molding of drip irrigation fittings, so as to solve the technical problems of high cost and low efficiency caused by the need for assembly after separate production of drip irrigation fittings in the prior art.
[0004] To solve the above technical problems, the present invention provides an in-mold assembly mold for injection molding of drip irrigation fittings, including an upper mold, a B plate, a backing plate, a moving mold base plate, and a first ejection assembly. The backing plate is connected above the moving mold base plate, and a mold core is connected to the upper end of the backing plate. When the mold is closed, a plurality of pipe fitting cavities and a plurality of kit cavities are formed between the upper mold and the mold core. Each pipe fitting cavity is located between two kit cavities on the left and right and is coaxially arranged with the two kit cavities on the left and right; The B plate is vertically movably arranged at the upper end of the backing plate. Two first driving components are connected to the B plate. Each first driving component is connected with a push plate. The two push plates are arranged at intervals left and right, and the two kit cavities are located between the two push plates. The two first driving components respectively drive the two push plates to move towards each other so that the two kits are sleeved on the pipe fitting; A plurality of first forming shafts corresponding to the kit cavities one by one and located in the kit cavities for forming the inner holes of the kits are respectively penetrated in each push plate, and all the first forming shafts are connected to the B plate; A second driving component is connected to the B plate. The second driving component is connected with a plurality of second forming shafts respectively passing through the first forming shafts and located in the pipe fitting cavity for forming the inner holes of the pipe fittings. The second driving component drives all the second forming shafts to move in the left-right direction; The first ejection assembly is arranged between the B plate and the moving mold base plate and is used to drive the B plate to move vertically.
[0005] After adopting the above structure, the in-mold assembly mold for injection molding of a drip irrigation fitting of the present invention has the following advantages: The pipe fitting cavity and the kit cavity are integrated on the mold, and the second forming shaft and the first forming shaft are respectively arranged for forming the inner hole of the pipe fitting and the inner hole of the kit. After injection molding, the first ejecting component drives the B plate to move upward, so that the B plate is separated from the backing plate and the mold core, driving the first driving component, the second driving component, the ejector plate, the first forming shaft, and the second forming shaft on the B plate to move upward synchronously. The first forming shaft and the second forming shaft are still inserted in the inner hole of the kit and the inner hole of the pipe fitting. Therefore, the kit and the pipe fitting are driven to rise synchronously, so that the kit, the pipe fitting and the mold core are separated. Then, the first driving component drives the two ejector plates to move towards each other, pushing the two kits to be sleeved on the pipe fitting. The second driving component drives the second forming shaft to be withdrawn from the inner hole of the pipe fitting, completing the blanking of the product, completing the production and in-mold assembly of the pipe fitting and the kit, without the need for workers or other equipment to assemble, reducing costs and improving production efficiency.
[0006] As an improvement, an extension part with an outer diameter larger than the inner diameter of the pipe fitting and an inner diameter smaller than the outer diameter of the pipe fitting is provided at one end of each first forming shaft away from the ejector plate, and a forming part for forming the inner hole of the kit is provided on each first forming shaft; adopting this structure, the extension part can be used as the sealant of the kit, and at the same time, when the second forming shaft is withdrawn from the inner hole of the pipe fitting, the extension part is used as the limit of the pipe fitting to prevent the pipe fitting from moving synchronously with the second forming shaft, resulting in the failure of the second forming shaft to be withdrawn.
[0007] As an improvement, when the mold is closed, there are several forming areas arranged at intervals in the left-right direction between the upper mold and the mold core. Each forming area is provided with several pipe fitting cavities and several kit cavities, and each forming area corresponds to two ejector plates. The ejector plates on the same side of each forming area are connected by a connecting rod; adopting this structure, by setting multiple forming areas, the number of products produced each time is increased, the production efficiency is improved, and at the same time, multiple ejector plates can be driven by one first driving component, with a simple structure and reduced mold cost.
[0008] As an improvement, the second driving component includes a hydraulic cylinder, a first connecting plate and a slider. The first connecting plate is connected to the side wall of the B plate, the slider is slidably connected to the first connecting plate in the left-right direction, the hydraulic cylinder drives the slider to move left and right, and all the second forming shafts are connected to the slider; adopting this structure, it has the advantages of simple structure and stable movement.
[0009] As an improvement, the first ejecting component includes a secondary ejector plate, several ejector rods connected to the secondary ejector plate, and several springs respectively sleeved on the several ejector rods. The secondary ejector plate is vertically movably arranged between the B plate and the moving mold base plate, and the upper ends of all the ejector rods pass through the backing plate and are connected to the B plate; adopting this structure, the secondary ejector plate drives the ejector rods to move the B plate upward, and when resetting, the compressed spring resets the secondary ejector plate.
[0010] As an improvement, two second connecting plates are connected to the B plate and arranged at intervals in the left-right direction. Two kit cavities are located between the two second connecting plates. All the first forming shafts on the left side of the kit cavity are connected to the second connecting plate on the left side of the kit cavity, and all the first forming shafts on the right side of the kit cavity are connected to the second connecting plate on the right side of the kit cavity.
[0011] As an improvement, adjacent pipe fitting cavities and adjacent kit cavities are connected and communicated through runners. A second ejecting component is arranged between the B plate and the moving die base plate for separating the gate waste formed in the runners from the pipe fittings and the kits; with this structure, by connecting and communicating adjacent pipe fitting cavities and adjacent kit cavities through runners, the number of feeding ports can be reduced.
[0012] As an improvement, the second ejecting component includes a panel, a bottom plate and a plurality of ejector pins. The panel and the bottom plate are sequentially arranged between the backing plate and the first ejecting component in the up-down direction in a movable manner. The panel is connected to all the ejector pins, and the upper ends of all the ejector pins pass through the backing plate and the mold core and are located below the runners; with this structure, when the mold is opened, the panel and the bottom plate drive the ejector pins to rise, separating the gate waste in the runners from the products. Description of the Drawings
[0013] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.
[0014] Figure 2 It is a top view of the B plate part in the present invention.
[0015] Figure 3 It is Figure 2 a partial enlarged view of part A in
[0016] Figure 4 It is Figure 2 a partial enlarged view of part B in
[0017] Figure 5 It is a three-dimensional structural schematic diagram of the B plate part in the present invention.
[0018] Figure 6 It is a connection structural schematic diagram of the B plate and the second connecting plate in the present invention.
[0019] Reference Numerals: 1. Upper Mold; 2. B Plate; 3. Backing Plate; 4. Moving Die Base Plate; 5. First Ejecting Component; 51. Secondary Pin Plate; 52. Ejector Rod; 53. Spring; 6. Mold Core; 7. Pipe Fitting Cavity; 8. Kit Cavity; 9. First Driving Component; 10. Pusher Plate; 11. First Forming Shaft; 12. Second Driving Component; 122. First Connecting Plate; 123. Slide Block; 13. Second Forming Shaft; 14. Extension Portion; 15. Forming Portion; 16. Link; 17. Second Connecting Plate; 18. Runner; 19. Second Ejecting Component; 191. Panel; 192. Bottom Plate; 193. Ejector Pin. Detailed implementation mode
[0020] The following will combine the accompanying drawings to make a detailed description of an in-mold assembly mold for injection molding of drip irrigation fittings according to the present invention.
[0021] As Figures 1 to 6 shown, an in-mold assembly mold for injection molding of drip irrigation fittings includes an upper mold 1, a B plate 2, a backing plate 3, a moving mold base plate 4, and a first ejection assembly 5. The backing plate 3 is connected above the moving mold base plate 4, and the backing plate 3 and the moving mold base plate 4 always remain stationary. A mold core 6 is connected to the upper end of the backing plate 3. When the mold is closed, a plurality of pipe fitting cavities 7 and a plurality of kit cavities 8 are formed between the upper mold 1 and the mold core 6. That is to say, a part of a plurality of pipe fitting cavities 7 and a plurality of kit cavities 8 are respectively arranged on the upper mold 1 and the mold core 6. When the mold is closed, these two parts are combined into complete pipe fitting cavities 7 and kit cavities 8.
[0022] Each pipe fitting cavity 7 is located between two kit cavities 8 on the left and right and is coaxially arranged with the two kit cavities 8 on the left and right. That is to say, each pipe fitting cavity 7 and a total of two kit cavities 8 on its left and right sides form a group. In this embodiment, when the mold is closed, a plurality of forming areas are arranged at intervals in the left-right direction between the upper mold 1 and the mold core 6. Each forming area is provided with a plurality of pipe fitting cavities 7 and a plurality of kit cavities 8. The plurality of pipe fitting cavities 7 in each forming area are distributed in the front-back direction, and the plurality of kit cavities 8 are correspondingly also distributed in the front-back direction. One kit is arranged on each side of the left and right of each formed pipe fitting.
[0023] The B plate 2 is movably arranged vertically above the backing plate 3. Two first driving assemblies 9 are connected to the B plate 2. Each first driving assembly 9 is connected with a push plate 10. The two push plates 10 are arranged at intervals left and right, and the two kit cavities 8 are located between the two push plates 10. The two first driving assemblies 9 respectively drive the two push plates 10 to move towards each other so that the two kits are sleeved on the pipe fitting. For this embodiment, since there are multiple forming areas, each forming area corresponds to two push plates 10. The push plates 10 on the same side of each forming area are connected by a connecting rod 16.
[0024] Specifically, in this embodiment, a total of three forming areas are arranged from left to right. A push plate 10 is arranged on each of the left and right sides of each forming area. As Figure 6 shown, three hollow parts are arranged in the middle of the B plate 2 to avoid the forming area (mold core 6). The left push plates 10 (a total of three) of each forming area are connected by a connecting rod 16. The right push plates 10 (a total of three) of each forming area are connected by another connecting rod 16. One of the first driving assemblies 9 drives a push plate 10 on the left, driving the three push plates 10 to move. The other first driving assembly 9 drives a push plate 10 on the right, driving the three push plates 10 to move. Each push plate 10 is slidably connected to the B plate 2. In this embodiment, the first driving assembly 9 is a hydraulic cylinder.
[0025] As shown Figure 3 in the figure, several first forming shafts 11 corresponding to the kit cavities 8 one by one and located in the kit cavities 8 for forming the inner holes of the kits are arranged in each pushing plate 10, and all the first forming shafts 11 are connected to the B plate 2; as Figure 6 shown in the figure, two second connecting plates 17 arranged at intervals in the left - right direction are connected to the B plate 2. Similarly, two second connecting plates 17 correspond to each forming area. The two kit cavities 8 are located between the two second connecting plates 17. Specifically, the kit cavities 8 on the left and right sides in the same forming area are both located between the two second connecting plates 17. All the first forming shafts 11 located on the left side of the kit cavity 8 are connected to the second connecting plate 17 on the left side of the kit cavity 8, and all the first forming shafts 11 located on the right side of the kit cavity 8 are connected to the second connecting plate 17 on the right side of the kit cavity 8.
[0026] For the same forming area, the two pushing plates 10 are located between the two second connecting plates 17. Therefore, the first forming shafts 11 pass through the pushing plates 10 and are in sliding fit with the pushing plates 10.
[0027] As Figure 3 and Figure 5 shown in the figure, a second driving assembly 12 is connected to the B plate 2. The second driving assembly 12 is connected with several second forming shafts 13 that respectively pass through the first forming shafts 11 and are located in the pipe fitting cavities 7 for forming the inner holes of the pipe fittings. The second driving assembly 12 drives all the second forming shafts 13 to move in the left - right direction; in this embodiment, one set of second driving assemblies 12 corresponds to the forming area on the left side, and one set of second driving assemblies 12 corresponds to the two forming areas on the right side. That is to say, the coaxial pipe fitting cavities 7 in the two forming areas on the right side share one first forming shaft 11.
[0028] As Figure 5 shown in the figure, the second driving assembly 12 includes a hydraulic cylinder, a first connecting plate 122 and a slider 123. The first connecting plate 122 is connected to the side wall of the B plate 2. The slider 123 is slidably connected to the first connecting plate 122 in the left - right direction. The hydraulic cylinder drives the slider 123 to move left and right, and all the second forming shafts 13 are connected to the slider 123.
[0029] As Figure 3 shown in the figure, an extension part 14 with an outer diameter larger than the inner diameter of the pipe fitting and an inner diameter smaller than the outer diameter of the pipe fitting is provided at one end of each first forming shaft 11 away from the pushing plate 10. A forming part 15 for forming the inner hole of the kit is provided on each first forming shaft 11. As Figure 4 shown in the figure is the in - mold schematic diagram after the pipe fitting and the kit are formed. The extension part 14 extends beyond the formed kit.
[0030] In addition, as Figure 3As shown, the adjacent pipe fitting cavities 7 and the adjacent kit cavities 8 are connected through the runner 18. A second ejecting component 19 is provided between the B plate 2 and the moving die base plate 4 for separating the gate waste formed in the runner 18 from the pipe fittings and the kits. Figure 3 The four pipe fitting cavities 7 and the eight kit cavities 8 in Figure 3 share a feed port and are connected through the runner 18. Therefore, after molding, as Figure 4 shown, gate waste is formed in the runner 18.
[0031] As Figure 1 shown, the first ejecting component 5 is provided between the B plate 2 and the moving die base plate 4 and is used to drive the B plate 2 to move vertically. The first ejecting component 5 includes a secondary ejector plate 51, a plurality of ejector rods 52 connected to the secondary ejector plate 51, and a plurality of springs 53 respectively sleeved on the plurality of ejector rods 52. The secondary ejector plate 51 is movably arranged vertically between the B plate 2 and the moving die base plate 4, and the upper ends of all the ejector rods 52 pass through the backing plate 3 and are connected to the B plate 2.
[0032] As Figure 1 shown, the second ejecting component 19 includes a face plate 191, a bottom plate 192, and a plurality of ejector pins 193. The face plate 191 and the bottom plate 192 are sequentially arranged movably in the up and down direction between the backing plate 3 and the first ejecting component 5, that is, above the secondary ejector plate 51. The face plate 191 is connected to all the ejector pins 193. The upper ends of all the ejector pins 193 pass through the backing plate 3, the mold core 6, and are located below the runner 18, and the two ends of the spring 53 abut between the backing plate 3 and the face plate 191.
[0033] Integrate the pipe fitting mold cavity 7 and the kit mold cavity 8 on the mold, and respectively set the second forming shaft 13 and the first forming shaft 11 for forming the inner hole of the pipe fitting and the inner hole of the kit. After injection molding, first, the upper mold 1 is opened. At this time, the ejector rod of the injection molding machine ejects, driving the panel 191, the bottom plate 192 and the ejector pin 193 to move, moving upward by 20 mm. The ejector pin 193 ejects upward to separate the gate waste from the pipe fitting and the kit. The fixed-distance screw between the bottom plate 192 and the secondary ejector plate 51 limits the 20-mm distance. At this time, the B plate 2 and the backing plate 3 are locked by the mold opening and closing device, and the secondary ejector plate 51 remains stationary with the moving mold base plate 4 through the nylon buckle; during the second ejection, the ejector rod of the injection molding machine continues to eject, and the panel 191, the bottom plate 192, and the secondary ejector plate 51 move upward together by 50 mm (the secondary ejector plate 51 is driven by the fixed-distance screw). At this time, the mold opening and closing device is opened, and the ejector rod 52 ejects the B plate 2 to move 50 mm, causing the B plate 2 to separate from the backing plate 3 and the mold core 6, driving the first driving assembly 9, the second driving assembly 12, the push plate 10, the first forming shaft 11, and the second forming shaft 13 on the B plate 2 to move upward synchronously. The first forming shaft 11 and the second forming shaft 13 are still inserted into the inner hole of the kit and the inner hole of the pipe fitting. Therefore, the kit and the pipe fitting are driven to rise synchronously, causing the kit and the pipe fitting to separate from the mold core 6. At the same time, the lifter and the inner pin in the mold core 6 for forming the pipe fitting are also disengaged from the undercut, achieving complete separation from the undercut. This part of the structure is the prior art in the field of pipe fitting injection molding and will not be elaborated here; then, the ejector rod of the injection molding machine retracts, and the spring 53 pushes the panel 191, the bottom plate 192, and the secondary ejector plate 51 to retract; then, the first driving assembly 9 drives the two push plates 10 to move towards each other, pushing the two kits to be sleeved on the pipe fitting to achieve in-mold assembly. The second driving assembly 12 drives the second forming shaft 13 to be withdrawn from the inner hole of the pipe fitting to complete the blanking of the product, completing the production and in-mold assembly of the pipe fitting and the kit, without the need for workers or other equipment for assembly, reducing costs and improving production efficiency.
[0034] It should be noted that the up and down and other orientations in this embodiment are only based on the perspective of the attached drawings and do not represent the moving direction of the actual mold.
[0035] The embodiments of the present invention have been described in detail above in conjunction with the attached drawings. However, the present invention is not limited to the above-described one embodiment. All other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.
Claims
1. An in-mold assembly mold for drip irrigation fittings, characterized in that, It includes an upper mold, a B plate, a backing plate, a moving mold base plate, and a first ejection assembly. The backing plate is connected above the moving mold base plate. A mold core is connected to the upper end of the backing plate. When the mold is closed, several pipe fitting cavities and several kit cavities are formed between the upper mold and the mold core. Each pipe fitting cavity is located between two kit cavities on the left and right and is coaxially arranged with the two kit cavities on the left and right. The B plate is vertically movably arranged at the upper end of the backing plate. Two first driving assemblies are connected to the B plate. Each first driving assembly is connected to a push plate. The two push plates are arranged at a left-right interval, and the two kit cavities are located between the two push plates. The two first driving assemblies respectively drive the two push plates to move towards each other so that the two kits are sleeved on the pipe fitting. A number of first forming shafts corresponding to the kit cavities one by one and located in the kit cavities for forming the inner holes of the kits are penetrated in each push plate, and all the first forming shafts are connected to the B plate. A second driving assembly is connected to the B plate. The second driving assembly is connected to a number of second forming shafts that respectively pass through the first forming shafts and are located in the pipe fitting cavities for forming the inner holes of the pipe fittings. The second driving assembly drives all the second forming shafts to move in the left-right direction. The first ejection assembly is arranged between the B plate and the moving mold base plate and is used to drive the B plate to move vertically.
2. The in-mold assembly mold for drip irrigation fittings injection molding according to claim 1, wherein, An extension part with an outer diameter larger than the inner diameter of the pipe fitting and an inner diameter smaller than the outer diameter of the pipe fitting is provided at one end of each first forming shaft away from the push plate. A forming part for forming the inner hole of the kit is provided on each first forming shaft.
3. The in-mold assembly mold for drip irrigation fittings injection molding according to claim 1, characterized in that, When the mold is closed, several forming areas are arranged at intervals in the left-right direction between the upper mold and the mold core. Each forming area is provided with several pipe fitting cavities and several kit cavities. Each forming area corresponds to two push plates, and the push plates on the same side of each forming area are connected by a connecting rod.
4. The in-mold assembly mold for drip irrigation fittings injection molding according to claim 1, characterized in that, The second driving assembly includes a hydraulic cylinder, a first connecting plate, and a slider. The first connecting plate is connected to the side wall of the B plate. The slider is slidably connected to the first connecting plate in the left-right direction. The hydraulic cylinder drives the slider to move left and right, and all the second forming shafts are connected to the slider.
5. The in-mold assembly mold for drip irrigation fittings injection molding according to claim 1, characterized in that, The first ejection assembly includes a secondary ejector plate, a number of ejector rods connected to the secondary ejector plate, and a number of springs respectively sleeved on the ejector rods. The secondary ejector plate is vertically movably arranged between the B plate and the moving mold base plate. The upper ends of all the ejector rods pass through the backing plate and are connected to the B plate.
6. The in-mold assembly mold for drip irrigation fittings injection molding according to claim 1, characterized in that, Two second connecting plates arranged at a left-right interval are connected to the B plate. The two kit cavities are located between the two second connecting plates. All the first forming shafts on the left side of the kit cavity are connected to the second connecting plate on the left side of the kit cavity, and all the first forming shafts on the right side of the kit cavity are connected to the second connecting plate on the right side of the kit cavity.
7. The in-mold assembly mold for injection molding of drip irrigation fittings according to claim 1, characterized in that, Between adjacent pipe fitting cavities and between adjacent kit cavities, they are communicated through a runner. A second ejecting assembly is provided between the B plate and the moving die base plate for separating the gate waste formed in the runner from the pipe fittings and the kits.
8. The in-mold assembly mold for drip irrigation fittings injection molding according to claim 7, characterized in that, The second ejecting assembly includes an ejector pin panel, an ejector pin bottom plate and a number of ejector pins. The ejector pin panel and the ejector pin bottom plate are sequentially arranged in the up and down direction between the backing plate and the first ejecting assembly. The ejector pin panel is connected to all the ejector pins, and the upper ends of all the ejector pins pass through the backing plate and the mold core and are located below the runner.