Precision injection molding device for multi-functional integrated armrests of car seats

Abstract

This invention discloses a precision injection molding device for a multifunctional integrated armrest of an automotive seat, comprising a base, two sets of columns symmetrically mounted on the top of the base, a fixed plate fixedly mounted on the top of the two sets of columns, an electric push rod fixedly mounted on the top of the fixed plate, and a movable plate fixedly mounted on the movable plate through the fixed plate, the movable plate being slidably connected to the two sets of columns. The device also includes: upper molds symmetrically mounted on the bottom of the movable plate, injection tubes symmetrically connected through the top of the movable plate, the injection tubes being connected through the upper molds, and a lower mold fixedly mounted below the two upper molds at the bottom of the base. This allows for automatic demolding of the armrest shell during continuous injection molding by lifting the upper molds, facilitating removal of the shell after molding, ensuring continuity of the injection molding process, and improving the efficiency of the shell injection molding process.

Description

Technical Field

[0001] This invention relates to the field of seat armrest manufacturing technology, specifically a precision injection molding device for multi-functional integrated armrests for automobile seats. Background Technology

[0002] Injection molding is a method of shaping industrial products. Products are typically made using rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding compression molding and die casting. An injection molding machine, also known as an injection machine or injection molding machine, is the main molding equipment that uses plastic molds to make plastic products of various shapes from thermoplastic or thermosetting materials. Injection molding is achieved through an injection molding machine and molds.

[0003] Publication number CN215320421U discloses an injection molding device for a seat armrest shell. Through the design of the base and top support, the overall height of the device can be effectively adjusted during use. Furthermore, the device can be effectively fixed and disassembled, and its installation can save workers a significant amount of time. However, this patent still has the following problems in practical use:

[0004] The designed base and top support allow for effective height adjustment during use. However, in actual use, when injection molding the seat armrest shell, demolding is difficult after injection molding, requiring manual demolding by workers. This reduces the production efficiency of the seat armrest shell. If an auxiliary demolding structure is added, the demolding structure can only be controlled during the lifting of the upper mold, resulting in poor continuity of processing when continuously injection molding the seat armrest shell.

[0005] A precision injection molding device for multifunctional integrated armrests of automobile seats is proposed to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a precision injection molding device for a multi-functional integrated armrest for automotive seats, to solve the problem mentioned in the background art. While the current design of the base and top support allows for effective height adjustment during use, in actual use, the armrest shell is difficult to demold after injection molding, requiring manual demolding, which reduces production efficiency. Adding an auxiliary demolding structure requires controlling its operation only during the lifting process of the upper mold, resulting in poor continuity during continuous injection molding of the armrest shell.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a precision injection molding device for a multi-functional integrated armrest for automotive seats, including a base;

[0008] Two sets of columns are symmetrically installed on the top of the base, and a fixed plate is fixedly installed on the top of the two sets of columns. An electric push rod is fixedly installed on the top of the fixed plate, and the movable end of the electric push rod passes through the fixed plate and is fixedly installed on a movable plate. The movable plate is slidably connected to the two sets of columns.

[0009] Also includes:

[0010] The bottom of the movable plate is symmetrically equipped with upper molds, and the top of the movable plate is symmetrically connected with injection tubes, which are connected to the upper molds. The bottom of the base is fixedly installed below the two upper molds, and the top of the lower mold is symmetrically provided with molding grooves. The interior and sides of the lower mold are symmetrically provided with demolding components.

[0011] The demolding component includes a connecting groove formed below the interior of the two molding grooves, and a push plate is provided inside the connecting groove.

[0012] The lower mold has mounting slots located below the two forming grooves, and a movable frame is fixedly installed at the bottom of the push plate, with the movable frame slidably connected to the lower mold.

[0013] Preferably, a movable plate is fixedly installed at the bottom of the movable frame, and a limiting frame is slidably connected to one side of the inner side of the movable plate. The limiting frame is fixedly connected to the mounting groove. Fixed rods are symmetrically installed on one side of the top of the movable plate, and a support frame is slidably connected to the outside of the two fixed rods. The support frame is fixedly connected to the lower mold.

[0014] Preferably, each of the two fixed rods is fitted with a telescopic spring on the outside of the support frame, and one end of the telescopic spring is fixedly connected to the support frame, and the other end of the telescopic spring is fixedly installed with a fixing block, and the fixing block is fixedly connected to the fixed rod.

[0015] Preferably, a connecting plate is fixedly installed on the top of the two fixed rods, and a vertical frame is symmetrically installed on the top of the connecting plate. A column rod is fixedly installed between the two vertical frames. A positioning frame is symmetrically installed on both sides of the two upper molds at the bottom of the movable plate, and a movable rod is symmetrically slidably connected inside the lower part of the positioning frame.

[0016] Preferably, a mounting plate is fixedly installed at one end of each of the two movable rods, and a push rod is fixedly installed on one side of the mounting plate, with a ramp provided below the end of the push rod away from the mounting plate.

[0017] Preferably, a connecting frame is fixedly installed at the other end of the two movable rods, and a fixing frame is fixedly installed on one side of the connecting frame. Furthermore, a return spring is sleeved on the outside of the two movable rods between the connecting frame and the positioning frame, and the two ends of the return spring are fixedly connected to the positioning frame and the connecting frame, respectively.

[0018] Preferably, column blocks are fixedly installed on the rear sides of both fixed frames, and support blocks are symmetrically installed on the upper sides of both sides of the lower mold. The support blocks have guide grooves on their front sides, and the column blocks are slidably connected to the guide grooves.

[0019] Preferably, the guide groove is provided with a composite guide structure: a ball bearing row is embedded in the bottom of the groove, and the steel balls are fixed by a retainer; a dovetail-shaped groove is opened on the side wall of the guide groove, which cooperates with the dovetail protrusion on the outside of the column to form an anti-tipping guide structure.

[0020] Preferably, the pusher plate adopts a hollow honeycomb structure: the main body is an aluminum alloy frame, the interior is filled with polyurethane elastomer, the upper surface is inlaid with wear-resistant ceramic sheets, the surface of the ceramic sheets is opened with annular guide grooves, and electric heating wires are embedded in the grooves.

[0021] Preferably, the return spring and the telescopic spring adopt a variable stiffness design: the diameter of the middle section of the spring is 15% larger than that of the two ends, forming a conical structure. The stiffness of the return spring is 50 N / m in the initial compression stage, and the stiffness increases to 80 N / m after the compression exceeds 15 mm. The telescopic spring is made of nickel-titanium alloy and is wrapped with a corrugated dust cover.

[0022] Compared with the prior art, the beneficial effects of the present invention are: the multi-functional integrated armrest precision injection molding device for automobile seats enables automatic demolding of the armrest shell by lifting the upper mold during continuous injection molding, facilitating the removal of the shell after molding, ensuring the continuity of injection molding, and improving the efficiency of shell injection molding. The specific details are as follows:

[0023] 1. During the injection molding of the handrail shell, the electric push rod is activated to move the movable plate downwards. After the movable plate moves downwards, the upper mold can be inserted into the molding groove on the lower mold. Then, the raw material is injected through the injection tube. Under the action of the upper mold and the molding groove, the shell is injection molded. When the handrail shell is removed, the electric push rod moves the movable plate upwards. During the upward movement of the movable plate, the push rod is located below the column rod, so the movable plate moves upwards along with the push rod, which can drive the fixed rod upwards. After the fixed rod moves upwards, it drives the moving plate upwards. At the same time, the movable plate moves upwards, and the movable frame drives the push plate upwards. After the push plate moves upwards, it can push the handrail shell out of the molding groove, thus completing the demolding of the handrail shell. This makes it convenient to demold the handrail shell after molding during processing, improving its practicality.

[0024] 2. During injection molding, the movable plate moves downward, causing the ejector rod to move downward as well. During this downward movement, the ejector rod passes through the guide groove. When the ejector rod moves above the column, the ramp below one end of the ejector rod abuts against the column. The movable plate then moves downward, allowing the ejector rod to push the mounting plate and movable rod together under the action of the column, thus stretching the return spring. After the ejector rod passes the column, the return spring causes the ejector rod to return to its original position, so that the top of the ejector rod abuts against the column. After injection molding is complete, the contact between the top of the ejector rod and the column causes the movable plate to move upward, thus moving the ejector rod. The movable plate moves upward to perform demolding. After the movable plate moves up a certain distance, the column block on the fixed frame moves into the guide groove. Then the movable plate continues to move upward, and the column block slides in the guide groove, which allows the connecting frame to be pulled closer to the lower mold. This causes the push rod to gradually move away from the column rod. As the movable plate moves upward, the push rod can disengage from the column rod. If the movable plate continues to move upward, it will no longer drive the movable plate to move upward. Thus, the demolding operation of the handrail shell can be performed solely by the movement of the movable plate. This allows for continuous processing of the handrail shell, ensuring processing continuity and improving processing efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of the lower mold of the present invention;

[0027] Figure 3 This is a schematic diagram of the mold closing structure of the present invention;

[0028] Figure 4 For the present invention Figure 3 Enlarged structural diagram of region A in the middle;

[0029] Figure 5 This is a partial structural diagram of the demolding component of the present invention.

[0030] In the diagram: 1. Base; 101. Column; 102. Fixing plate; 103. Electric push rod; 104. Movable plate; 105. Upper mold; 1051. Injection tube; 106. Lower mold; 107. Molding groove; 2. Demolding assembly; 201. Connecting groove; 202. Push plate; 203. Mounting groove; 204. Movable frame; 205. Moving plate; 206. Limiting frame; 207. Support frame; 208. Fixing rod; 209. Telescopic spring; 210. Fixing block; 211. Connecting plate; 212. Upright frame; 213. Column; 214. Positioning frame; 215. Movable rod; 216. Mounting plate; 217. Push rod; 218. Connecting frame; 219. Return spring; 220. Fixing frame; 221. Column block; 222. Support block; 223. Guide groove. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-5 This invention provides a technical solution: a precision injection molding device for a multi-functional integrated armrest of an automobile seat, comprising a base 1, two sets of columns 101 symmetrically mounted on the top of the base 1, a fixing plate 102 fixedly mounted on the top of the two sets of columns 101, and an electric push rod 103 fixedly mounted on the top of the fixing plate 102. The movable end of the electric push rod 103 passes through the fixing plate 102 and is fixedly mounted on a movable plate 104, which is slidably connected to the two sets of columns 101. The device also includes: an upper mold 105 symmetrically mounted on the bottom of the movable plate 104, and injection tubes 1051 symmetrically connected through the top of the movable plate 104, with the injection tubes 1051 and the upper mold 105 connected through the injection tubes. The bottom of the base 1... A lower mold 106 is fixedly installed below the two upper molds 105. The top of the lower mold 106 is symmetrically provided with forming grooves 107. The interior and sides of the lower mold 106 are symmetrically provided with demolding components 2. The demolding components 2 include connecting grooves 201 opened below the interior of the two forming grooves 107. The interior of the connecting grooves 201 is provided with push plates 202. The interior of the lower mold 106 is provided with mounting grooves 203 below the two forming grooves 107. The bottom of the push plates 202 is fixedly installed with movable frames 204. The movable frames 204 are slidably connected to the lower mold 106, which facilitates the demolding of the handrail shell after it is formed during processing, thus improving its practicality.

[0033] A movable plate 205 is fixedly installed at the bottom of the movable frame 204, and a limit frame 206 is slidably connected to one side of the inner side of the movable plate 205. The limit frame 206 is fixedly connected to the mounting groove 203. Fixed rods 208 are symmetrically installed on one side of the top of the movable plate 205, and a support frame 207 is slidably connected to the outside of the two fixed rods 208. The support frame 207 is fixedly connected to the lower mold 106, so that the movement of the fixed rods 208 can drive the movable plate 205 to move. A telescopic spring 209 is sleeved on the outside of each of the two fixed rods 208 above the support frame 207. One end of the spring 209 is fixedly connected to the support frame 207, and the other end of the telescopic spring 209 is fixedly installed with a fixing block 210. The fixing block 210 is fixedly connected to the fixing rod 208, so that the fixing rod 208 can automatically reset after moving. A connecting plate 211 is fixedly installed on the top of the two fixing rods 208, and a vertical frame 212 is symmetrically installed on the top of the connecting plate 211. A column rod 213 is fixedly installed between the two vertical frames 212. A positioning frame 214 is symmetrically installed on both sides of the two upper molds 105 at the bottom of the movable plate 104. The interior of the positioning frame 214... A pair of movable rods 215 are symmetrically slidably connected below to support their movement. A mounting plate 216 is fixedly installed at one end of each of the two movable rods 215, and a push rod 217 is fixedly installed on one side of the mounting plate 216. A ramp is provided below the end of the push rod 217 away from the mounting plate 216, allowing the movable plate 205 to move via the push rod 217. A connecting frame 218 is fixedly installed at the other end of each of the two movable rods 215, and a fixing frame 220 is fixedly installed on one side of the connecting frame 218. The two movable rods 215 are located outside the connecting frame 218 and the positioning frame 220. A return spring 219 is fitted between each of the 14, and the two ends of the return spring 219 are fixedly connected to the positioning frame 214 and the connecting frame 218 respectively, so that the movable rod 215 can automatically return to its original position after moving. A column block 221 is fixedly installed on the rear side of each of the two fixed frames 220, and support blocks 222 are symmetrically installed on the upper sides of the lower mold 106. A guide groove 223 is opened on the front of the support block 222, and the column block 221 is slidably connected to the guide groove 223, so that when the column block 221 moves into the guide groove 223, the movable rod 215 can move left and right during the up and down movement.

[0034] In this invention, a composite guiding structure is provided inside the guide groove 223: a ball bearing array (steel balls with a diameter of 3mm and a spacing of 10mm) is embedded in the bottom of the groove, and the steel balls are fixed by a retainer, so that the sliding friction coefficient of the column block 221 is reduced from 0.3 to 0.08; a dovetail-shaped groove is opened on the side wall of the guide groove 223, which cooperates with the dovetail protrusion on the outer side of the column block 221 (the cooperation gap is ≤0.05mm) to form an anti-tipping guiding structure, ensuring that the straightness error of the column block 221 during sliding is ≤0.1mm.

[0035] In this invention, the push plate 202 adopts a hollow honeycomb structure: the main body is an aluminum alloy frame (wall thickness 2mm), the interior is filled with polyurethane elastomer (Shore hardness 70A), and the upper surface is inlaid with a detachable wear-resistant ceramic sheet (thickness 1.5mm, hardness HV1100). The surface of the ceramic sheet has an annular guide groove (depth 0.8mm, width 2mm), and an electric heating wire (power 5W) is embedded in the groove. The push plate 202 can be heated to 60-80℃ before demolding, softening the edge of the shell to facilitate demolding.

[0036] In this invention, the return spring 219 and the telescopic spring 209 adopt a variable stiffness design: the diameter of the middle section of the spring is 15% larger than that of the two ends, forming a conical structure. The stiffness of the return spring 219 is 50 N / m in the initial compression stage, and the stiffness increases to 80 N / m after the compression exceeds 15 mm. The telescopic spring 209 is made of nickel-titanium alloy, which has superelasticity. The elastic decay is ≤3% in the temperature range of -20℃ to 80℃. The spring is wrapped with a corrugated dust cover (made of nitrile rubber) to prevent the accumulation of injection molding waste.

[0037] Working principle: Before using this multi-functional integrated armrest precision injection molding device for car seats, it is necessary to check the overall condition of the device to ensure it can function properly. Figure 1 - Figure 5 As shown, during the injection molding of the armrest shell, the electric push rod 103 is activated to move the movable plate 104 downward. After the movable plate 104 moves downward, the upper mold 105 can be inserted into the molding groove 107 on the lower mold 106. Then, the raw material is injected through the injection tube 1051. Under the action of the upper mold 105 and the molding groove 107, the shell is injection molded. Afterward, when the armrest shell is removed, the electric push rod 103 moves the movable plate 104 upward. During the upward movement of the movable plate 104, the push rod 217 is located below the column rod 213. This allows the movable plate 104 to move upward along with the push rod 217, which in turn drives the fixed rod 208 to move upward. After the support frame 207 moves upward, the fixed rod 208 drives the movable plate 205 to move upward. At the same time as the movable plate 205 moves upward, the movable frame 204 drives the push plate 202 to move upward. After the push plate 202 moves upward, it can push the handrail shell inside the forming groove 107 out of the forming groove 107, thereby completing the demolding of the handrail shell. This makes it easier to demold the handrail shell after it has been formed during the processing of the handrail shell, thus improving its practicality.

[0038] During injection molding, the movable plate 104 moves downward, causing the push rod 217 to move downward as well. During this downward movement, the column block 221 can pass through the guide groove 223. When the push rod 217 moves above the column rod 213, the ramp below one end of the push rod 217 abuts against the column rod 213. The movable plate 104 then moves downward, allowing the push rod 217 to push the mounting plate 216 and the movable rod 215 under the action of the column rod 213, thus stretching the return spring 219. After the push rod 217 passes the column rod 213, the return spring 219 causes the push rod 217 to return to its original position, causing the top of the push rod 217 to abut against the column rod 213. After injection molding is complete, the abutment between the top of the push rod 217 and the column rod 213 causes the movable plate 104 to... 4. Moving the movable plate 205 upwards can perform demolding. After the movable plate 104 moves upwards by a certain distance, the column block 221 on the fixed frame 220 moves into the guide groove 223. Then, the movable plate 104 continues to move upwards, and the column block 221 slides in the guide groove 223, which can pull the connecting frame 218 closer to the lower mold 106. This causes the push rod 217 to gradually move away from the column rod 213. As the movable plate 104 moves upwards, the push rod 217 can disengage from the column rod 213. If the movable plate 104 continues to move upwards, it will no longer drive the movable plate 205 upwards. Therefore, the demolding operation of the handrail shell can be performed solely by the movement of the movable plate 104. The handrail shell can be continuously processed, ensuring the continuity of processing and improving the processing efficiency of the handrail shell.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multifunctional integrated armrest precision injection molding device for an automobile seat, comprising a base; The top of the base is symmetrically provided with two groups of stand columns, the top ends of the two groups of stand columns are fixedly provided with fixed plates, the top of the fixed plate is fixedly provided with an electric push rod, the movable end of the electric push rod penetrates through the fixed plate and is fixedly provided with a movable plate, and the movable plate is slidably connected with the two groups of stand columns; characterized in that It also includes: The bottom of the movable plate is symmetrically provided with an upper mold, the top of the movable plate is symmetrically penetrated and connected with an injection tube, the injection tube is penetrated and connected with the upper mold, the bottom of the base is fixedly provided with a lower mold below the two upper molds, the top of the lower mold is symmetrically provided with a molding groove, and the inside of the lower mold and the two sides are symmetrically provided with a demolding assembly; The demolding assembly includes a connecting groove provided below the two molding grooves, and a push plate is provided in the connecting groove; The inside of the lower mold below the two molding grooves is provided with a mounting groove, the bottom of the push plate is fixedly provided with a movable frame, and the movable frame is slidably connected with the lower mold; The bottom of the movable frame is fixedly provided with a moving plate, one side of the inside of the moving plate is slidably connected with a limiting frame, the limiting frame is fixedly connected with the mounting groove, one side of the top of the moving plate is symmetrically provided with a fixed rod, the outside of the two fixed rods is slidably connected with a support frame, and the support frame is fixedly connected with the lower mold; The top of the two fixed rods is fixedly provided with a connecting plate, the top of the connecting plate is symmetrically provided with a stand, two stands are fixedly provided between the two stands, the bottom of the movable plate is symmetrically provided with a positioning frame on the two sides of the two upper molds, and the inside of the positioning frame is symmetrically slidably connected with a movable rod; One end of the two movable rods is fixedly provided with a mounting plate, one side of the mounting plate is fixedly provided with a push rod, and one end of the push rod away from the mounting plate is provided with an inclined slope below; The other end of the two movable rods is fixedly provided with a connecting frame, one side of the connecting frame is fixedly provided with a fixed frame, and the outside of the two movable rods between the connecting frame and the positioning frame is sleeved with a reset spring, and the two ends of the reset spring are respectively fixedly connected with the positioning frame and the connecting frame; The rear side of the two fixed frames is fixedly provided with a column block, the two sides of the lower mold are symmetrically provided with a support block above, and the front of the support block is provided with a guide groove, and the column block is slidably connected with the guide groove; The inside of the guide groove is provided with a composite guide structure: the groove bottom is embedded with a ball row, and the steel balls are fixed by a retainer; the side wall of the guide groove is provided with a dovetail groove, which cooperates with the dovetail convex strip on the outside of the column block to form an anti-tilting guide structure; The push plate adopts a hollow honeycomb structure: the main body is an aluminum alloy frame, the inside is filled with a polyurethane elastomer, the upper surface is inlaid with a wear-resistant ceramic sheet, the surface of the ceramic sheet is provided with an annular flow guide groove, and the groove is embedded with an electric heating wire; The reset spring and the extension spring adopt a variable stiffness design: the diameter of the middle section of the spring is 15% larger than that of the two ends, forming a tapered structure, the stiffness of the reset spring is 50N / m in the initial compression stage, and the stiffness increases to 80N / m after the compression amount exceeds 15mm; the extension spring is made of nickel-titanium alloy, and the spring is wrapped with a corrugated tube dustproof sleeve.

2. The multifunction integrated armrest precision injection molding device for automobile seat according to claim 1, characterized in that: Two said fixed rods are externally sleeved with telescopic springs above the support frame, one end of the telescopic spring is fixedly connected with the support frame, the other end of the telescopic spring is fixedly installed with a fixed block, and the fixed block is fixedly connected with the fixed rod.

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