Cold runner mold for damping bushing
By using cold runner molds and improved manifold design, the problems of premature vulcanization and blockage of rubber in hot runner molds were solved, achieving uniform distribution of rubber and efficient production, reducing production costs and improving product quality.
Patent Information
- Application Number
- CN202522364293.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-11-07
AI Technical Summary
In existing shock-absorbing bushing injection molding technology, hot runner molds cause premature vulcanization of the rubber material and blockage of the runner, resulting in waste of rubber material, increased production costs and reduced production efficiency.
A cold runner mold is used, which incorporates a cold runner plate and a cold runner tube frame. Cold water circulation is used to neutralize the high-temperature rubber compound. Combined with an improved manifold design, this prevents premature vulcanization and clogging of the rubber compound, ensuring uniform flow of the rubber compound.
It effectively prevents premature vulcanization of rubber compounds, reduces waste rubber formation, lowers production costs, and improves production efficiency and product quality stability.
Smart Images
Figure CN223877441U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to mould technical field especially relates to a shock absorbing bushing cold runner mould. BACKGROUND
[0002] The shock absorbing bushing is an important part widely used in the field of automobile, machinery and the like, and its main function is to reduce vibration and impact, improve the stability and service life of equipment, and the shock absorbing bushing is usually made of rubber material and has good elasticity and wear resistance, and can maintain stable performance under complex working conditions, and in the processing of the shock absorbing bushing, the shock absorbing bushing needs to be formed through a mould, the upper mould is installed on a vulcanization press, and when processing, the vulcanization press drives the upper mould and the lower mould to close, thereby forming a sealed forming space, the vulcanization press delivers the vulcanized rubber material into the injection pipe frame of the upper mould, a plurality of injection nozzles are connected to the injection pipe frame, the injection nozzles inject the vulcanized rubber material into a plurality of forming cavities of the lower mould respectively, and the rubber material gradually forms the required shape of the shock absorbing bushing under high temperature and high pressure;
[0003] In the existing shock absorbing bushing injection molding technology, the traditional mould usually adopts a hot runner injection structure, specifically, a network-shaped runner is arranged in the upper mould, and the runner is composed of a plurality of branches and connecting points, the complex structure and long path of the runner system lead to relatively increased residence time of the molten plastic in the runner, under high temperature, the rubber material in the hot runner is more prone to vulcanization, and part of the rubber material may be vulcanized before entering the cavity, thereby changing the performance and flowability of the rubber material, the rubber material that is vulcanized in advance not only cannot normally participate in the forming process, but also forms solidified waste rubber in the runner to block the runner, thereby affecting the delivery of the subsequent rubber material, which not only causes a large amount of waste of the rubber material, increases the production cost, and reduces the production efficiency, but also needs to be manually cleaned for a long time and a lot of effort after the waste rubber is solidified in the runner, thereby affecting the continuity of production.
[0004] To solve the above problems, the shock absorbing bushing cold runner mould is provided in the application. UTILITY MODEL CONTENTS
[0005] Based on the technical problems in the background art, the utility model provides a shock absorbing bushing cold runner mould.
[0006] The utility model provides a shock absorbing bushing cold runner mould, which comprises an upper mould and a lower mould.
[0007] The upper mould comprises a cold runner plate, a loading chamber is arranged in the cold runner plate, a cold flow pipe frame is integrally formed in the loading chamber, and a water inlet and a water outlet that are in communication with the cold flow pipe frame are arranged on the side surface of the cold runner plate.
[0008] A plurality of injection nozzles arranged in an array are connected to the path of the cold runner frame, and the injection nozzles are used to inject rubber into the lower mold for molding, the inner wall of the injection nozzle is provided with a sandwich cavity in communication with the cold runner frame, and the middle part of the injection nozzle is provided with an injection channel which is not communicated with the sandwich cavity.
[0009] The cold runner plate is provided with injection members for respectively conveying rubber into the plurality of injection nozzles.
[0010] Preferably, the upper mold further comprises a heat insulation plate, a heating plate and a distribution plate, the heat insulation plate is installed at the bottom of the cold runner plate and sleeved on the plurality of injection nozzles, the heating plate is installed at the bottom of the heat insulation plate and sleeved on the plurality of injection nozzles, the distribution plate is installed at the bottom of the heating plate, the top surface of the distribution plate is provided with a plurality of injection ports arranged in an array, the bottoms of the plurality of injection nozzles respectively extend into the plurality of injection ports, the bottom surface of the distribution plate is provided with a plurality of distribution grooves arranged in an array, the plurality of distribution grooves are respectively communicated with the plurality of injection ports, and the two ends of the distribution grooves are formed with distribution holes penetrating through the bottom of the distribution plate.
[0011] Preferably, the lower mold comprises a lower mold plate, a middle mold plate and an upper mold plate, the middle mold plate is installed at the top of the lower mold plate, the middle mold plate is provided with a plurality of molding cavities arranged in an array, the upper mold plate is arranged at the top of the middle mold plate, the upper mold plate is provided with a plurality of groups of injection holes, the plurality of groups of injection holes are respectively corresponding to the plurality of molding cavities and the plurality of distribution grooves, the number of each group of injection holes is two, and the two injection holes of each group are respectively corresponding to the distribution holes at the two ends of the plurality of distribution grooves.
[0012] Preferably, the two sides of the middle mold plate are connected with first side ears.
[0013] Preferably, the two sides of the upper mold plate are connected with second side ears.
[0014] Preferably, the injection member comprises a feeding shaft and an injection pipe frame, the top of the cold runner plate is provided with the feeding shaft, the bottom of the feeding shaft is connected with the injection pipe frame distributed in the loading chamber, the bottom of the injection pipe frame is integrally connected with a plurality of discharge ends, and the injection channels in the plurality of injection nozzles are respectively communicated with the plurality of discharge ends at the bottom of the injection pipe frame.
[0015] The above technical scheme of the utility model has the following beneficial technical effects:
[0016] 1. In use, the upper mold is installed on the vulcanizing press, the vulcanizing press drives the upper mold to combine with the lower mold, the rubber material is transported to the injection pipe frame through the feeding shaft, is distributed to a plurality of injection nozzles, the water inlet and the water outlet of the cold runner plate in the upper mold are connected with the water inlet pipe and the water outlet pipe, cold water enters the cold flow pipe frame from the water inlet, is discharged from the water outlet to form a circulation, because the injection nozzles are arranged on the path of the cold flow pipe frame, the cold water can pass through the interlayer cavity of the inner wall of the injection nozzle, neutralize the high-temperature rubber material, prevent the rubber material from being vulcanized in advance, which avoids the change of the performance and flowability of the rubber material, prevents the waste rubber from being solidified and blocked in the runner, reduces the waste of the rubber material, reduces the production cost, improves the production efficiency, reduces the time and energy of manual cleaning of the runner, and ensures the continuity of production.
[0017] 2. The mold improves the distribution plate in the upper mold, a plurality of injection ports arranged in an array are formed on the top surface of the distribution plate, the bottoms of a plurality of injection nozzles extend into the injection ports, a plurality of distribution grooves arranged in an array are formed on the bottom surface of the distribution plate, the distribution grooves are communicated with the injection ports, and both ends of the distribution grooves have distribution holes penetrating through the bottom of the distribution plate, the rubber material enters the injection ports from the injection nozzles, is distributed in the distribution grooves, is discharged through the distribution holes, and then is injected into a plurality of forming cavities in the middle mold plate through a plurality of injection holes in the upper mold plate in the lower mold to form shock absorber bushings, after the improvement, each injection nozzle corresponds to a distribution groove, uniform distribution of the rubber material is realized, the rubber material is prevented from being vulcanized in advance due to a long residence time, waste is reduced, cost is reduced, production efficiency is improved, and product quality stability is improved. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a whole structure schematic view of the shock absorber bushing cold runner mold.
[0019] Figure 2 It is a side view of the shock absorber bushing cold runner mold.
[0020] Figure 3 It is a separation structure schematic view of the upper mold and the lower mold.
[0021] Figure 4 It is a top view of the cold runner plate.
[0022] Figure 5 It is a structure schematic view of the injection nozzle.
[0023] Figure 6 It is a bottom structure schematic view of the heating plate.
[0024] Figure 7 It is a top structure schematic view of the distribution plate.
[0025] Figure 8 It is a bottom structure schematic view of the distribution plate.
[0026] Figure 9 For the utility model Figure 2 The enlarged view of A in the middle;
[0027] Figure 10 For the utility model, the separation structure diagram of the middle template and the upper template is shown.
[0028] The figure mark: 1, the upper mould; 11, the cold runner plate; 111, the water inlet; 112, the water outlet; 12, the heat insulation plate; 13, the heating plate; 14, the shunt plate; 141, the injection port; 142, the shunt groove; 1421, the shunt hole; 15, the injection nozzle; 151, the interlayer cavity; 16, the injection part; 161, the feeding shaft; 162, the injection pipe support; 17, the cold flow pipe support; 2, the lower mould; 21, the lower template; 22, the middle template; 221, the forming cavity; 222, the first side lug; 23, the upper template; 231, the injection hole; 232, the second side lug. Specific implementation
[0029] In order to make the purpose, technical scheme and advantage of the utility model more clear and obvious, the utility model is further explained in detail below in combination with specific implementation and referring to the drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.
[0030] As Figures 1-10 Indicated, the utility model provides a kind of shock absorbing bushing cold runner mould, including upper mould 1 and lower mould 2;
[0031] Upper mould 1 includes cold runner plate 11, and loading chamber is opened in cold runner plate 11, and cold flow pipe support 17 is integrally formed in loading chamber, and the side surface of cold runner plate 11 is provided with water inlet 111 and water outlet 112 communicated with cold flow pipe support 17;
[0032] Multiple injection nozzles 15 in array arrangement are connected on the path of cold flow pipe support 17, and injection nozzle 15 is used to inject rubber into lower mould 2 to form, and the inner wall of injection nozzle 15 is provided with interlayer cavity 151 communicated with cold flow pipe support 17, and injection nozzle 15 is provided with injection channel in the middle, and injection channel is not communicated with interlayer cavity 151;
[0033] Cold runner plate 11 is installed with injection part 16 for conveying rubber into multiple injection nozzles 15 respectively.
[0034] The upper mold 1 is installed on a vulcanization press, and the lower mold 2 is installed on a corresponding station. The vulcanization press drives the upper mold 1 and the lower mold 2 to be closed. During operation, cold water enters the cold flow pipe frame 17 from the water inlet 111, flows through the interlayer cavity 151 of the injection nozzle 15, and is discharged from the water outlet 112 to form a circulation. The cold water circulating through the interlayer cavity 151 can neutralize the high-temperature rubber compound, prevent the rubber compound from prematurely vulcanizing due to excessive temperature, prevent the properties and flowability of the rubber compound from changing, reduce the solidification and blocking of waste rubber in the flow channel, reduce waste of the rubber compound and production cost, and reduce the time and effort of manual cleaning of the flow channel. At the same time, the injection part 16 delivers the rubber compound to the injection nozzle 15, and the injection nozzle 15 injects the rubber compound into the lower mold 2 to form a shape.
[0035] It should be noted that the water inlet 111 on the side of the cold runner plate 11 is connected to a water inlet pipe, and the water outlet 112 is connected to a water outlet pipe. The water inlet pipe and the water outlet pipe are connected to a cold water supply system.
[0036] In specific embodiments, the upper mold 1 further includes a heat insulation plate 12, a heating plate 13, and a distribution plate 14. The heat insulation plate 12 is installed at the bottom of the cold runner plate 11 and is sleeved on the plurality of injection nozzles 15. The heating plate 13 is installed at the bottom of the heat insulation plate 12 and is sleeved on the plurality of injection nozzles 15. The distribution plate 14 is installed at the bottom of the heating plate 13. The top surface of the distribution plate 14 is provided with a plurality of injection ports 141 arranged in an array. The bottoms of the plurality of injection nozzles 15 respectively extend into the plurality of injection ports 141. The bottom surface of the distribution plate 14 is provided with a plurality of distribution grooves 142 arranged in an array. The plurality of distribution grooves 142 respectively communicate with the plurality of injection ports 141. The two ends of each distribution groove 142 are respectively formed with a distribution hole 1421 penetrating through the bottom of the distribution plate 14.
[0037] When the injection nozzles 15 discharge the rubber compound, the rubber compound can be respectively injected into the plurality of injection ports 141 on the distribution plate 14, then distributed in the distribution grooves 142 on the bottom surface of the distribution plate 14, and then discharged through the distribution holes 1421 at the two ends of the distribution grooves 142 to enter the lower mold 2 to form a shape.
[0038] It should be noted that the heat insulation plate 12 prevents heat loss from affecting the state of the rubber compound. The heating plate 13 is provided with a heating rod to maintain the flowability of the rubber compound in the injection nozzles 15. This is prior art and will not be described in detail.
[0039] In specific embodiments, the lower mold 2 includes a lower mold plate 21, a middle mold plate 22, and an upper mold plate 23. The middle mold plate 22 is installed at the top of the lower mold plate 21. The middle mold plate 22 is provided with a plurality of molding cavities 221 arranged in an array. The upper mold plate 23 is arranged at the top of the middle mold plate 22. The upper mold plate 23 is provided with a plurality of injection holes 231. Each group of injection holes 231 is provided with two injection holes 231. Each group of two injection holes 231 respectively corresponds to the plurality of distribution grooves 142 and the distribution holes 1421 at the two ends of the distribution grooves 142.
[0040] When the distributor plate 14 discharges the rubber through the distribution holes 1421 at both ends of the distribution grooves 142 on the bottom surface, the upper mold plate 23 of the lower mold 2 realizes the material guiding function through the plurality of groups of injection holes 231 opened on the top, and the rubber flowing out of the distribution holes 1421 will first pass through the two injection holes 231 of the corresponding group of the upper mold plate 23, be vertically downwardly conveyed along the channel of the injection hole 231, and finally be injected into the corresponding molding cavity 221 of the middle mold plate 22. After the rubber fills the molding cavity 221, the rubber completes vulcanization and curing in the molding cavity 221 under the high temperature and high pressure conditions provided by the vulcanization press, and finally forms a shock absorbing bushing that meets the specifications.
[0041] It should be noted that after the product is formed, a small amount of waste material will be on the surface of the upper mold plate 23. After the mold is opened, the mechanical hand will be lowered to clamp the protruding runner waste, and the air gun installed on the mechanical hand will start blowing, thereby realizing the cleaning of the waste material on the surface of the upper mold plate 23. This is prior art and will not be described in detail.
[0042] In specific embodiments, the two sides of the middle mold plate 22 are connected with first side ears 222.
[0043] The first side ear 222 can be connected with an external air cylinder. After the shock absorbing bushing is formed in the molding cavity 221, the external air cylinder applies a force to the middle mold plate 22 through the first side ear 222 to drive the middle mold plate 22 to move, thereby facilitating the operator to take out the formed shock absorbing bushing from the molding cavity 221.
[0044] In specific embodiments, the two sides of the upper mold plate 23 are connected with second side ears 232.
[0045] The second side ear 232 can also be connected with an external corresponding air cylinder. After the shock absorbing bushing is formed, the external driving structure acts on the second side ear 232 to lift the upper mold plate 23, thereby providing space for the subsequent movement of the middle mold plate 22 and the taking out of the shock absorbing bushing, and avoiding the upper mold plate 23 from hindering the taking operation.
[0046] In specific embodiments, the injection part 16 includes an injection shaft 161 and an injection pipe rack 162. The top of the cold runner plate 11 is provided with the injection shaft 161, and the bottom of the injection shaft 161 is connected with the injection pipe rack 162 distributed in the loading chamber. The bottom of the injection pipe rack 162 is integrally connected with a plurality of discharge ends, and the injection channels in the plurality of injection nozzles 15 are in communication with the plurality of discharge ends at the bottom of the injection pipe rack 162.
[0047] The vulcanization press delivers the rubber to the injection shaft 161. The rubber enters the injection pipe rack 162 through the injection shaft 161, the injection pipe rack 162 distributes the rubber to each discharge end, and then delivers the rubber to the injection channel of the corresponding injection nozzle 15 through the discharge end. Finally, the rubber is discharged through the injection nozzle 15.
[0048] The specific working principle of the mold is as follows:
[0049] The upper mold 1 is installed on the vulcanizing press, the lower mold 2 is placed in the corresponding station, the vulcanizing press drives the upper mold 1 to move downward, the upper mold 1 is combined with the lower mold 2 to form a sealed forming space;
[0050] The water inlet 111 on the side of the cold runner plate 11 is connected to the water inlet pipe, the water outlet 112 is connected to the water outlet pipe, the cold water supply system is started, the cold water enters the cold runner frame 17 in the cold runner plate 11 from the water inlet 111, flows in the cold runner frame 17, flows through the interlayer cavity 151 on the inner wall of the injection nozzle 15, and finally is discharged from the water outlet 112 to form a continuous cold water circulation to cool the injection nozzle 15;
[0051] The vulcanizing press delivers the rubber compound to the feeding shaft 161, the rubber compound enters the injection pipe frame 162 in the loading chamber of the cold runner plate 11 through the feeding shaft 161, the injection pipe frame 162 divides the rubber compound to the multiple discharge ends at the bottom thereof, and the rubber compound is delivered into the injection channels of the multiple injection nozzles 15 through the discharge ends. In this process, the heat insulation plate 12 in the upper mold 1 reduces heat transfer to avoid excessive loss of cold of the cold runner plate 11, and the heating plate 13 maintains a suitable temperature to ensure that the rubber compound maintains good fluidity during the flow process;
[0052] The rubber compound in the injection nozzle 15 is discharged from the bottom thereof, enters the injection port 141 corresponding to the top surface of the distribution plate 14, and flows into the distribution groove 142 on the bottom surface of the distribution plate 14 through the injection port 141. The rubber compound flows in the distribution groove 142 to both ends and is discharged through the distribution holes 1421 penetrating the bottom of the distribution plate 14 at both ends of the distribution groove 142;
[0053] The rubber compound discharged from the distribution holes 1421 enters the injection hole 231 corresponding to the upper mold plate 23, is injected into the corresponding forming cavity 221 in the middle mold plate 22 through the injection hole 231, and gradually forms a shock absorbing bushing of a required shape under high temperature and high pressure in the forming cavity 221;
[0054] When the shock absorbing bushing is formed in the forming cavity 221, the vulcanizing press drives the upper mold 1 to move upward and away from the lower mold 2, then the cylinders connected to the second side ears 232 on both sides of the upper mold plate 23 are started to push up the upper mold plate 23, and then the cylinders connected to the first side ears 222 on both sides of the middle mold plate 22 are started to push up the middle mold plate 22. The operator can take out the shock absorbing bushing formed in the middle mold plate 22 to complete a production cycle.
[0055] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application.
Claims
1. A cold flow die for a vibration dampening bushing, characterized by, The upper mold (1) and the lower mold (2) are included. The upper mold (1) includes a cold runner plate (11), a loading chamber is formed in the cold runner plate (11), a cold runner pipe rack (17) is integrally formed in the loading chamber, and a water inlet (111) and a water outlet (112) are formed in the side of the cold runner plate (11) and communicate with the cold runner pipe rack (17). A plurality of injection nozzles (15) are arranged in an array on the path of the cold runner pipe rack (17), the injection nozzles (15) are used for injecting glue into the lower mold (2) to form, a cladding cavity (151) is formed in the inner wall of the injection nozzle (15) and communicates with the cold runner pipe rack (17), a glue injection channel is formed in the middle of the injection nozzle (15), and the glue injection channel does not communicate with the cladding cavity (151). The cold runner plate (11) is provided with glue injection parts (16) for respectively conveying glue into the plurality of injection nozzles (15).
2. A cold flow die for a vibration damper bushing as defined in claim 1, wherein The upper mold (1) further includes a heat insulation plate (12), a heating plate (13) and a flow distribution plate (14), the heat insulation plate (12) is installed at the bottom of the cold runner plate (11) and is sleeved on the plurality of injection nozzles (15), the heating plate (13) is installed at the bottom of the heat insulation plate (12) and is sleeved on the plurality of injection nozzles (15), the flow distribution plate (14) is installed at the bottom of the heating plate (13), a plurality of injection ports (141) are formed in the top surface of the flow distribution plate (14) and arranged in an array, the bottoms of the plurality of injection nozzles (15) respectively extend into the plurality of injection ports (141), a plurality of flow distribution grooves (142) are formed in the bottom surface of the flow distribution plate (14) and arranged in an array, the plurality of flow distribution grooves (142) respectively communicate with the plurality of injection ports (141), and flow distribution holes (1421) penetrating through the bottom of the flow distribution plate (14) are formed at both ends of the flow distribution grooves (142).
3. A cold flow die for a vibration damper bushing as defined in claim 2, wherein The lower mold (2) includes a lower mold plate (21), a middle mold plate (22) and an upper mold plate (23), the middle mold plate (22) is installed at the top of the lower mold plate (21), a plurality of forming cavities (221) are formed in the middle mold plate (22) and arranged in an array, the upper mold plate (23) is arranged at the top of the middle mold plate (22), a plurality of groups of injection holes (231) are formed in the upper mold plate (23), the plurality of groups of injection holes (231) respectively correspond to the plurality of forming cavities (221) and the plurality of flow distribution grooves (142), the number of injection holes (231) in each group is two, and the two injection holes (231) in each group respectively correspond to the flow distribution holes (1421) at both ends of the plurality of flow distribution grooves (142).
4. A cold flow die for a vibration damper bushing as defined in claim 3, wherein First side ears (222) are connected to both sides of the middle mold plate (22).
5. A cold flow die for cushion bushings as defined in claim 3 wherein, Second side ears (232) are connected to both sides of the upper mold plate (23).
6. A cold flow die for a vibration damper bushing as defined in claim 1, wherein The injection part (16) comprises an injection shaft (161) and an injection pipe frame (162), the top of the cold runner plate (11) is provided with the injection shaft (161), the bottom of the injection shaft (161) is connected with the injection pipe frame (162) distributed in the loading chamber, and the bottom of the injection pipe frame (162) is integrally connected with a plurality of discharge ends.