Injection molding production line and process for lower backing plate of thermosetting elastomer rail

Abstract

The invention provides an injection molding production line and process for a thermosetting elastomer rail lower cushion plate, and belongs to the field of injection molding. A mold filling unit; the suction unit is used for extracting bubbles in the mold and is arranged on the side part of the mold filling unit; the pressing unit is used for pressing and forming the mixture in the mold and is arranged on the side part of the suction unit; the guide rail used for guiding the molds to be combined is arranged in the forming unit; and the mold taking unit used for taking the mold from the lower base plate formed by the mold is arranged at the top of the guide rail. According to the mold unit, through the opening and closing plate which rotates and draws close to the inner side from the outer side and the movable demolding plate at the bottom, a material can be conveniently formed in a forming cavity defined by the opening and closing plate and the demolding plate, after forming, the opening and closing plate is unfolded outwards, and the demolding plate is lifted upwards, so that rapid demolding of a lower base plate is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to an injection molding production line and process for a thermosetting elastomer rail bottom pad. Background Art

[0002] Thermosetting elastomer rail pads are made by polymerizing polyester and polyether high-strength macromolecular chain monomers in different proportions using the principles of polymer mechanics and structural reorganization. Under high temperature conditions, a variety of molecular monomers are polymerized into a macromolecular assembly with a three-dimensional network structure, and the molecules have a high bonding strength. Through the cross-linking density of molecular polymerization, small molecular chain monomers with organic chain segments are introduced during polymerization to polymerize into high-strength, high-elasticity thermosetting elastomer rail pads, which can meet the high-strength use requirements of rail pads in heavy-load railways, mixed passenger and freight transportation, and curved turns. While meeting the use conditions, it also extends the service life of the pads, and has better economic benefits than ordinary rubber pads that serve in harsh conditions.

[0003] Thermosetting elastomer rail pads can withstand 300 million tons of axle weight without crushing damage under normal operating conditions of the line after long-term use; they can be interchanged with existing rubber pads and are easy to install; thermosetting elastomer rail pads have the advantages of high strength, good resilience after compression, and small compression deformation.

[0004] However, in the actual production of thermosetting elastomer rail pads, the raw materials need to be mixed and then introduced into the corresponding mold for molding. For thermosetting materials, mold molding is often accompanied by the generation of bubbles, resulting in a low product yield. In addition, the corresponding molded products are difficult to demold after molding, resulting in a slow improvement in product production efficiency, which is not conducive to the efficient and automated production of thermosetting elastomer rail pads. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art and to provide a thermosetting elastomer rail bottom pad injection molding production line, which can facilitate the molding of materials inside the molding cavity surrounded by the opening and closing plates and the stripping plate through the opening and closing plates that rotate from the outside to the inside of the mold unit, and the stripping plate that is movable at the bottom. After molding, the opening and closing plates are expanded outward and the stripping plate is lifted upward to achieve rapid demolding of the bottom pad.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A thermosetting elastomer rail pad injection molding production line, comprising:

[0008] Forming unit;

[0009] A mold filling unit, which is used for injecting material into the mold and is arranged on the top of the molding unit;

[0010] A suction unit for extracting bubbles from the inside of the mold, the suction unit being arranged on the side of the mold filling unit;

[0011] A pressing unit, for pressing and molding the mixed material inside the mold, the pressing unit being arranged on the side of the suction unit;

[0012] A guide rail, which is used to guide the molds to be assembled and is arranged inside the molding unit;

[0013] A mold removal unit, used for removing the mold from the lower pad formed by the mold, the mold removal unit is arranged on the top of the guide rail;

[0014] The guide rail is guided by the lifting rail to lift the constraint frame to lift and squeeze the mold unit to close. After closing, the mold filling unit injects material into the mold unit. The upper trigger groove cooperates with the impact head on the outside of the constraint frame to periodically impact the mold unit, and cooperates with the suction unit to extract and eliminate bubbles. After the extraction is completed, the pressing unit presses the raw material of the mold unit. After pressing, the demolding track plate guides and pushes the demolding plate to rise, so that the lower pad automatically rises from the inside of the mold unit to demold.

[0015] Preferably, the guide rail comprises a lifting rail, the lifting rail is arranged on the top of the guide rail and connected to the guide rail, a revolving belt is arranged on the inner side of the guide rail, and the revolving belt is movably connected to the inner wall of the molding unit through a power fixing plate;

[0016] A rotating wheel is clamped inside the guide rail, and the rotating wheel is transmission-connected to a mobile power unit through a vertical column. The mobile power unit is preferably a Ruizhi-stepping reduction motor, and a movable sleeve is provided at the bottom of the vertical column.

[0017] Preferably, the lifting rails are symmetrically distributed about the midline of the guide rails;

[0018] The power fixing plate includes a rotary drive unit, which is arranged at the bottom of the power fixing plate and is connected to the power fixing plate through a transmission belt and a rotary belt. The rotary drive unit is preferably a three-phase asynchronous reduction motor.

[0019] Preferably, the movable sleeve comprises limiting grooves, which are symmetrically arranged on both sides of the movable sleeve, and the limiting grooves are movably connected to the impact head through the side column;

[0020] The side column is elastically connected to a hollow stop ring through an elastic member, the hollow stop ring is arranged on a side of the movable sleeve away from the rotating wheel, and the elastic member is preferably a spring.

[0021] Preferably, a constraint frame is provided inside the movable sleeve; a high temperature resistant rubber layer is provided around the inside of the constraint frame, and the constraint frame is elastically constrained by the rubber layer inside the constraint frame and the outer diameter of the mold unit;

[0022] A mold unit is movably arranged inside the constraint frame, and the mold unit comprises a molding cavity arranged in the middle, a bottom plate arranged at the bottom, and an opening and closing plate arranged at the outside.

[0023] Preferably, the bottom plate is movably connected to the opening and closing plate via a transversely arranged rotating shaft, and the molding cavity is arranged on the top of the bottom plate and the inner side of the opening and closing plate for receiving the molding material;

[0024] A bottom accommodating cavity is arranged inside the bottom plate, and a supporting connecting block is arranged at the bottom of the bottom plate. The supporting connecting block is fixedly arranged on the top of the rotating belt for synchronous movement and the supporting connecting block protrudes from the rotating belt and is arranged on the top of the power fixing plate, so as to be supported by the power fixing plate.

[0025] Preferably, a stripping plate is movably provided inside the bottom accommodating cavity, a bayonet matching the thickness of the bottom plate is provided at the bottom end of the inner side of the opening and closing plate, and a restraining block is provided at the top side of the outer surface of the opening and closing plate;

[0026] The bottom of the stripping plate is connected with the bending plate through a pushing rod.

[0027] Preferably, the bending plates are symmetrically distributed about the center line of the push rod, rolling rollers are arranged opposite to the inner sides of the symmetrically arranged bending plates, and the inner sides of the power fixing plates are connected to the demoulding track plates through the extension columns;

[0028] The demoulding track plate includes a lifting plate, which is arranged at the lower part of the lifting rail and is staggered with the projection of the lifting rail relative to the inner wall of the molding unit. The lifting rail and the demoulding track plate are provided with demoulding track grooves along their outer contours. The demoulding track grooves are symmetrically arranged with respect to the center line of the demoulding track plate, and the oppositely arranged rolling rollers are movably fitted in the symmetrically arranged demoulding track grooves.

[0029] Preferably, the molding unit comprises an upper trigger groove and a lower trigger groove, the upper trigger groove is separately provided on the top side of the inner surface of the molding unit, and the lower trigger groove is separately provided on the bottom side of the inner surface of the molding unit;

[0030] The bottom of the inner side of the molding unit is symmetrically provided with clamping plates, the inner side of the clamping plates is movably connected through clamping grooves and collecting plates, and the molding unit is slightly protruded outward at the upper trigger groove and the lower trigger groove, so that the impact head can move inward under the extrusion force.

[0031] The molding unit further comprises a side plate, which is arranged at the side of the molding unit, an inspection door is arranged on the surface of the side plate, a mounting plate is arranged on the top of the molding unit, a processing cavity is arranged on the inner side of the molding unit, the demoulding track plate is arranged inside the processing cavity, and a collecting groove is opened on the surface of the collecting plate.

[0032] The mold filling unit, the suction unit, the pressing unit, and the mold removal unit are sequentially distributed along the length side of the molding unit.

[0033] The mold filling unit comprises a mold filling bracket, which is arranged on the top of the mounting plate, a mold filling tank is installed in the middle of the mold filling bracket, the top of the mold filling tank is connected to an external connecting pipe, a mold filling pipe head is arranged on the top of the mold filling tank, and the mold filling pipe head is correspondingly arranged on the top of the lifting rail, and the mold filling tank is connected to the mold filling bracket through a stabilizing frame;

[0034] The suction unit comprises a suction frame, which is movably connected to the mounting plate through an electric slide rail at the bottom thereof, and an exhaust unit and a telescopic unit are arranged on the top of the suction frame, and the exhaust unit is conductively connected to the exhaust cavity plate through a hose, and the top of the exhaust cavity plate is arranged at the bottom end of the synchronous frame, and the synchronous frame and the telescopic unit are movably connected, and a synchronous camera is arranged at the bottom of the synchronous frame for identifying the docking of the exhaust cavity plate and the mold unit;

[0035] The pressing unit comprises a pressing frame, a pressing driving unit is arranged in the middle of the pressing frame, a pressing plate is arranged at the bottom of the pressing driving unit, a heat setting cavity is arranged inside the pressing plate, and the heat setting cavity is connected to the heat setting unit through a conduit.

[0036] The mold taking unit comprises a mold taking frame, and the mold taking frame is arranged on the top of the mounting plate;

[0037] A mobile mold taking unit is arranged in the middle of the mold taking frame, and a suction unit is arranged at the bottom of the mobile mold taking unit. At the same time, synchronous cameras need to be arranged at the bottom of the pressing frame, the mold taking frame and the mold filling bracket to improve the accuracy of docking.

[0038] Another object of the present invention is to provide a thermosetting elastomer rail pad injection molding process in view of the deficiencies in the prior art. The production of the thermosetting elastomer rail pad is achieved by combining step one with step five. The produced thermosetting elastomer rail pad has the characteristics of high strength and appropriate stiffness, and can effectively ensure the geometric shape and position; it has good oil resistance and weather resistance, and can withstand long-term immersion in grease without swelling, deformation, crushing, etc.; and compared with traditional rubber pads, the service life of the thermosetting elastomer rail pad is greatly improved, which effectively reduces the replacement frequency and maintenance workload of the rail pad, saves maintenance costs, and has significant social and economic benefits.

[0039] To achieve the above object, the present invention provides the following technical solutions:

[0040] Step 1: Mold assembly: The mold unit is closed by lifting the constraint frame and moved to the bottom of the mold filling unit for injection preparation;

[0041] Step 2: Material injection: the injection unit injects the mixed material into the molding cavity of the mold unit;

[0042] Step 3: Vibration for uniform debubbling: The upper triggering groove pushes the impact head to impact the vibrating mold unit, so that the bubbles inside the mold unit rise and are discharged by the suction unit whose top descends to perform synchronous motion suction;

[0043] Step 4: Thermosetting pressing: When the mold unit moves to the bottom of the pressing unit, the heated pressing unit moves downward to heat and press the material inside the mold unit to shape it;

[0044] Step 5: Rising demoulding: The demoulding track plate pulls and pushes the demoulding plate to rise, so that the lower pad rises from the inside of the mold unit to demould.

[0045] The beneficial effects of the present invention are:

[0046] (1) The mold unit of the present invention can facilitate the molding of materials inside the molding cavity surrounded by the opening and closing plates and the stripping plate through the opening and closing plates that rotate and close together from the outside to the inside and the stripping plate that moves at the bottom. After molding, the opening and closing plates are expanded outward and the stripping plate is lifted upward to achieve rapid demolding of the lower pad.

[0047] (2) The present invention realizes synchronous operation of the rotary belt and the mobile power unit. When the constraint frame moves along the circulating rail to the first lifting rail under the drive of the mobile power unit, the constraint frame is slightly tilted and rises along the height direction of the mold unit. Under the elastic constraint of its inner rubber layer, when the mobile power unit reaches a flat state after passing the first lifting rail, the constraint frame elastically constrains the constraint block to close the opening and closing plate, so that the mold unit completes the closed assembly, which is convenient for the injection molding pipe head to inject the mixed raw materials into the molding cavity inside the mold unit.

[0048] (3) The present invention covers the surface of the mold unit by telescoping the exhaust chamber plate downward, and at this time, the impact head on the outside of the constraint frame will periodically contact the raised inner wall of the molding unit at that location, and under the reset of the upper trigger groove and the elastic member, the impact head will periodically impact the mold unit, thereby activating the bubbles inside the mold unit, making it easier for the exhaust chamber plate to remove the bubbles inside the mold unit, thereby achieving control of the molding quality of the lower pad and ensuring that the thermosetting elastomer rail lower pad has high strength.

[0049] (4) The present invention presses down the pressing plate in the pressing unit so that the material inside the mold unit is solidified and formed during the heating and pressing. After the solidification is completed, the mobile power unit will fall along the second lifting rail and return to the circulation rail, driving the constraint frame to move down to the bottom of the constraint block, so that the constraint of the opening and closing plate is released. After the constraint of the opening and closing plate is released, the bending plate moves to the lifting plate, so that the bending plate, under the guidance of the lifting plate, drives the stripping plate to rise, so that the formed lower pad is removed from the inside of the mold unit, thereby achieving efficient demolding; after the demolding is completed, the suction unit that extends and retracts at the bottom of the mold removal unit will remove the lower pad from the mold, and when the constraint frame moves to the lower trigger groove, the impact head continues to impact the mold unit, so that the remaining molding residues in the mold unit are vibrated and removed, which is convenient for subsequent automated cyclic production.

[0050] (5) The thermosetting elastomer rail pad of the present invention has the characteristics of high strength and appropriate rigidity, and can effectively ensure the geometric shape and position; it has good oil resistance and weather resistance, and can be soaked in oil for a long time without swelling, deformation, crushing and the like; compared with the traditional rubber pad, the service life of the thermosetting elastomer rail pad is greatly improved, which effectively reduces the replacement frequency and maintenance workload of the rail pad, saves maintenance costs, and has significant social and economic benefits.

[0051] In summary, the present invention has the advantages of high efficiency and good defoaming effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0053] Figure 2 It is a schematic diagram of the collecting plate of the present invention;

[0054] Figure 3 It is a schematic diagram of the rotary belt connection structure of the present invention;

[0055] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of the middle C part;

[0056] Figure 5 for Figure 3 Schematic diagram of the enlarged structure of part D

[0057] Figure 6 This is a schematic diagram of the vertical column connection structure of the present invention;

[0058] Figure 7 This is a schematic diagram of the connection structure of the constraint frame of the present invention;

[0059] Figure 8 This is a schematic diagram of the jacking plate connection structure of the present invention;

[0060] Fig. 9 This is a schematic diagram of the connection structure of the rotary drive unit of the present invention;

[0061] Fig.10 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0062] Fig.11 for Figure 1 A schematic diagram of the enlarged structure of part B;

[0063] Fig.12 This is a schematic diagram of the heat-setting cavity connection structure of the present invention;

[0064] Fig.13 It is a schematic diagram of the process flow of the present invention.

[0065] In the figure:

[0066] 1. Molding unit; 101. Side plate; 102. Inspection door; 103. Mounting plate; 1031. Electric slide rail; 104. Processing chamber; 105. Clamping plate; 1051. Clamping groove; 106. Collecting plate; 1061. Collecting groove; 107. Upper trigger groove; 108. Lower trigger groove;

[0067] 2. Mold filling unit; 201. Mold filling bracket; 202. Mold filling tank; 203. Stabilizing frame; 204. Connecting pipe; 205. Mold filling pipe head;

[0068] 3. Suction unit; 301. Suction rack; 302. Ventilation unit; 303. Telescopic unit; 304. Synchronous rack; 3041. Synchronous camera; 305. Ventilation chamber plate;

[0069] 4. Pressing unit; 401. Pressing frame; 402. Pressing driving unit; 403. Pressing plate; 4031. Heat setting chamber; 404. Heat setting unit; 4041. Catheter;

[0070] 5. Guide rail; 501. Circulation rail; 5011. Lifting rail; 502. Rotating belt; 503. Power fixing plate; 5031. Rotating drive unit; 5032. Transmission belt; 504. Vertical column; 5041. Mobile power unit; 5042. Rotating wheel; 5043. Movable sleeve; 50431. Restriction groove; 5044. Impact head; 50441. Side column; 50442. Elastic member; 50443. Hollow retaining ring; 505. Mold unit ; 5051, molding cavity; 5052, bottom plate; 50521, bottom accommodating cavity; 50522, supporting connecting block; 5053, opening and closing plate; 50531, restraining block; 50532, bayonet; 5054, rotating shaft; 5056, stripping plate; 5057, pushing rod; 5058, bending plate; 5059, rolling roller; 506, stripping track plate; 5061, stripping track groove; 5062, lifting plate; 5063, epitaxial column; 507, restraining frame;

[0071] 6. Mould taking unit; 601. Mould taking frame; 602. Mobile mould taking unit; 603. Suction unit. DETAILED DESCRIPTION

[0072] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0073] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0075] Embodiment 1

[0076] like Figure 1-3 As shown, a thermosetting elastomer rail bottom pad injection molding production line includes:

[0077] Molding unit 1;

[0078] A mold filling unit 2 for injecting material into the mold, the mold filling unit 2 is arranged on the top of the molding unit 1;

[0079] A suction unit 3 for extracting bubbles from the inside of the mold, the suction unit 3 being arranged on the side of the mold filling unit 2;

[0080] A pressing unit 4, which is used to press and shape the mixed material inside the mold, is arranged on the side of the suction unit 3;

[0081] A guide rail 5 for guiding the molds to be assembled. The guide rail 5 is arranged inside the molding unit 1;

[0082] A mold removal unit 6, which is used to remove the mold of the lower pad formed by the mold, and the mold removal unit 6 is arranged on the top of the guide rail 5;

[0083] The guide rail 5 is guided by the lifting rail 5011 to lift the constraint frame 507 to lift and squeeze the mold unit 505 to close. After closing, the injection molding unit 2 injects material into the mold unit 505, and the upper trigger groove 107 cooperates with the impact head 5044 on the outside of the constraint frame 507 to periodically impact the mold unit 505, and cooperates with the suction unit 3 to extract and eliminate bubbles. After the extraction is completed, the pressing unit 4 presses the raw material of the mold unit 505. After the pressing is completed, the demolding track plate 506 guides and pushes the demolding plate 5056 to rise, so that the lower pad automatically rises from the inside of the mold unit 505 to demold.

[0084] The guide rail 5 includes a lifting rail 5011, which is arranged on the top of the guide rail 5 and connected to the guide rail 5. A revolving belt 502 is arranged on the inner side of the guide rail 5. The revolving belt 502 is movably connected to the inner wall of the molding unit 1 through a power fixing plate 503.

[0085] like Figure 4-9 As shown, a rotating wheel 5042 is clamped inside the guide rail 5, and the rotating wheel 5042 is connected to the mobile power unit 5041 through a vertical column 504. The mobile power unit 5041 is preferably a Ruizhi-stepping reduction motor, and a movable sleeve 5043 is provided at the bottom of the vertical column 504.

[0086] Wherein, the lifting rails 5011 are symmetrically distributed about the midline of the guide rail 5;

[0087] The power fixing plate 503 includes a rotary drive unit 5031, which is arranged at the bottom of the power fixing plate 503 and is connected to the rotary belt 502 through a transmission belt 5032. The rotary drive unit 5031 is preferably a three-phase asynchronous reduction motor.

[0088] The movable sleeve 5043 includes limiting grooves 50431, which are symmetrically arranged on both sides of the movable sleeve 5043, and the limiting grooves 50431 are movably connected to the impact head 5044 through the side column 50441;

[0089] The side column 50441 is elastically connected to the hollow stop ring 50443 via an elastic member 50442. The hollow stop ring 50443 is arranged inside the movable sleeve 5043 on a side away from the rotating wheel 5042. The elastic member 50442 is preferably a spring.

[0090] The inner side of the movable sleeve 5043 is provided with a constraint frame 507; the inner side of the constraint frame 507 is surrounded by a high temperature resistant rubber layer, and the constraint frame 507 is elastically constrained by the rubber layer inside it and the outer diameter of the mold unit 505.

[0091] A mold unit 505 is movably disposed inside the constraint frame 507 , and the mold unit 505 includes a molding cavity 5051 disposed in the middle thereof, a bottom plate 5052 disposed at the bottom thereof, and an opening and closing plate 5053 disposed on the outside thereof.

[0092] The bottom plate 5052 is movably connected to the opening and closing plate 5053 via a transversely arranged rotating shaft 5054, and the molding cavity 5051 is arranged on the top of the bottom plate 5052 and the inner side of the opening and closing plate 5053 for receiving the molding material;

[0093] A bottom accommodating cavity 50521 is provided inside the bottom plate 5052, and a supporting connecting block 50522 is provided at the bottom of the bottom plate 5052. The supporting connecting block 50522 is fixedly provided on the top of the rotating belt 502 for synchronous movement, and the supporting connecting block 50522 protrudes. The rotating belt 502 is arranged on the top of the power fixing plate 503, so as to be supported by the power fixing plate 503. The rotating belt 502 is preferably a conveyor belt.

[0094] The bottom accommodating cavity 50521 is provided with a stripping plate 5056 movably disposed inside, the bottom end of the inner side of the opening and closing plate 5053 is provided with a bayonet 50532 that matches the thickness of the bottom plate 5052, and the top side of the outer surface of the opening and closing plate 5053 is provided with a restraining block 50531;

[0095] The bottom of the stripping plate 5056 is connected via a push rod 5057 and a bending plate 5058 .

[0096] The bending plates 5058 are symmetrically distributed about the center line of the push rod 5057, and rolling rollers 5059 are arranged opposite to the inner sides of the symmetrically arranged bending plates 5058, and the inner side of the power fixing plate 503 is connected to the demoulding track plate 506 through the extension column 5063;

[0097] The demoulding track plate 506 includes a lifting plate 5062, which is arranged at the lower part of the lifting rail 5011 and is staggered with the lifting rail 5011 in front and back relative to the projection of the inner wall of the molding unit 1. The lifting rail 5011 and the demoulding track plate 506 are provided with a demoulding track groove 5061 along their outer contours. The demoulding track groove 5061 is symmetrically arranged with respect to the center line of the demoulding track plate 506, and the oppositely arranged rolling rollers 5059 are movably fitted in the symmetrically arranged demoulding track groove 5061.

[0098] The molding unit 1 includes an upper trigger groove 107 and a lower trigger groove 108. The upper trigger groove 107 is separately provided on the top side of the inner surface of the molding unit 1, and the lower trigger groove 108 is separately provided on the bottom side of the inner surface of the molding unit 1.

[0099] The bottom of the inner side of the molding unit 1 is symmetrically provided with a clamping plate 105, and the inner side of the clamping plate 105 is movably connected to the collecting plate 106 through a clamping groove 1051. The molding unit 1 is slightly protruded outward at the upper trigger groove 107 and the lower trigger groove 108, so that the impact head 5044 can move inward under the extrusion force.

[0100] like Figure 10-12 As shown, the molding unit 1 further includes a side plate 101, which is arranged on the side of the molding unit 1, and an inspection door 102 is arranged on the surface of the side plate 101. A mounting plate 103 is arranged on the top of the molding unit 1. A processing cavity 104 is arranged on the inner side of the molding unit 1, and the demoulding track plate 506 is arranged inside the processing cavity 104. A collecting groove 1061 is opened on the surface of the collecting plate 106.

[0101] The mold filling unit 2 , the suction unit 3 , the pressing unit 4 , and the mold removal unit 6 are sequentially distributed along the length side of the molding unit 1 .

[0102] The mold filling unit 2 includes a mold filling bracket 201, which is arranged on the top of the mounting plate 103, a mold filling tank 202 is installed in the middle of the mold filling bracket 201, the top of the mold filling tank 202 is connected to an external connection pipe 204, a mold filling pipe head 205 is arranged on the top of the mold filling tank 202, and the mold filling pipe head 205 is correspondingly arranged on the top of the lifting rail 5011, and the mold filling tank 202 is connected to the mold filling bracket 201 through a stabilizing frame 203;

[0103] The suction unit 3 includes a suction frame 301, which is movably connected to the mounting plate 103 through an electric slide rail 1031 at the bottom thereof, and an exhaust unit 302 and a telescopic unit 303 are arranged on the top of the suction frame 301. The exhaust unit 302 is preferably a two-stage rotary vane vacuum pump, and the telescopic unit 303 is preferably a cylinder. The exhaust unit 302 is conductively connected to an exhaust chamber plate 305 through a hose, and the top of the exhaust chamber plate 305 is arranged at the bottom end of the synchronous frame 304. The synchronous frame 304 and the telescopic unit 303 are movably connected, and a synchronous camera 3041 is arranged at the bottom of the synchronous frame 304 for identifying the docking between the exhaust chamber plate 305 and the mold unit 505;

[0104] The pressing unit 4 comprises a pressing frame 401, a pressing driving unit 402 is arranged in the middle of the pressing frame 401, the pressing driving unit 402 is preferably an oil cylinder, a pressing plate 403 is arranged at the bottom of the pressing driving unit 402, a heat setting cavity 4031 is arranged inside the pressing plate 403, the heat setting cavity 4031 is connected to the heat setting unit 404 through a conduit 4041, and the heat setting unit 404 is preferably a Prade air duct heater or a Beichen Yike high-frequency electromagnetic induction heater, which is convenient for heating the pressed pressing plate 403.

[0105] The mold taking unit 6 comprises a mold taking frame 601, and the mold taking frame 601 is arranged on the top of the mounting plate 103.

[0106] A mobile mold taking unit 602 is arranged in the middle of the mold taking frame 601, and a suction unit 603 is arranged at the bottom of the mobile mold taking unit 602. The mobile mold taking unit 602 is preferably a cylinder, and the suction unit 603 is preferably a robot or a suction cup driven by an air source. At the same time, a synchronous camera 3041 is required to be arranged at the bottom of the pressing frame 401, the mold taking frame 601, and the mold filling bracket 201 to improve the accuracy of docking.

[0107] The mold unit 505 can facilitate the molding of the material inside the molding cavity 5051 surrounded by the opening and closing plates 5053 and the stripping plates 5056 through the opening and closing plates 5053 that rotate and close to each other from the outside to the inside, and the stripping plates 5056 that move at the bottom. After molding, the opening and closing plates 5053 are expanded outwards and the stripping plates 5056 are lifted upwards, so that the lower pad can be quickly demoulded.

[0108] Through the synchronous operation of the revolving belt 502 and the mobile power unit 5041, when the constraint frame 507 is driven by the mobile power unit 5041 to move along the circulating rail 501 to the first lifting rail 5011, the constraint frame 507 is slightly tilted and rises along the height direction of the mold unit 505. Under the elastic constraint of the inner rubber layer, when the mobile power unit 5041 reaches the plane state after passing the first lifting rail 5011, the constraint frame 507 elastically constrains the constraint block 50531 to close the opening and closing plate 5053, so that the mold unit 505 completes the closed assembly, which is convenient for the injection molding pipe head 205 to inject the mixed raw materials into the molding cavity 5051 inside the mold unit 505;

[0109] After the injection molding is completed, the exhaust chamber plate 305 is telescopically moved downward to cover the surface of the mold unit 505, and at this time, the impact head 5044 on the outside of the constraint frame 507 will periodically contact the inner wall of the molding unit 1 protruding there, and under the reset of the upper trigger groove 107 and the elastic member 50442, the impact head 5044 will periodically impact the mold unit 505, thereby activating the bubbles inside the mold unit 505, so that the exhaust chamber plate 305 can remove the bubbles inside the mold unit 505, thereby realizing the control of the molding quality of the lower pad, and ensuring that the thermosetting elastomer rail lower pad has high strength;

[0110] After the suction is completed, the suction chamber plate 305 is reset. When the mold unit 505 moves to the pressing unit 4, the pressing plate 403 in the pressing unit 4 is pressed down, so that the material inside the mold unit 505 is solidified and formed during the heating and pressing. After the solidification is completed, the mobile power unit 5041 will fall along the second lifting rail 5011 and return to the circulation rail 501, driving the constraint frame 507 to move down to the bottom of the constraint block 50531, so that the constraint of the opening and closing plate 5053 is released. After the constraint of the opening and closing plate 5053 is released, the bending plate 5058 moves to the top plate At 5062, the bending plate 5058, under the guidance of the lifting plate 5062, drives the stripping plate 5056 to rise, so that the formed lower pad is removed from the inside of the mold unit 505, thereby achieving efficient demolding; after the demolding is completed, the suction unit 603 that is telescoped at the bottom of the mold unit 6 will remove the lower pad from the mold, and when the constraint frame 507 moves to the lower trigger groove 108, the impact head 5044 continues to impact the mold unit 505, so that the remaining molding residues in the mold unit 505 are vibrated and removed, which is convenient for subsequent automated cycle production.

[0111] Embodiment 2

[0112] like Fig.13 As shown, this embodiment provides a thermosetting elastomer rail bottom pad injection molding production process, comprising the following steps:

[0113] Step 1: mold assembly: by lifting the constraint frame 507, the mold unit 505 is closed and moved to the bottom of the mold filling unit 2 for injection preparation;

[0114] Step 2: Injection: The injection unit 2 injects the mixed material into the molding cavity 5051 of the mold unit 505;

[0115] Step 3: Uniformly remove bubbles by vibration: The upper triggering groove 107 pushes the impact head 5044 to impact the vibrating mold unit 505, so that the bubbles inside the mold unit 505 rise and are discharged by the suction unit 3 whose top descends to perform synchronous suction;

[0116] Step 4: Thermosetting pressing: When the mold unit 505 moves to the bottom of the pressing unit 4, the heated pressing unit 4 moves downward to heat and press the material inside the mold unit 505 to shape it;

[0117] Step 5: Rising and demoulding: The demoulding track plate 506 pulls and pushes the demoulding plate 5056 to rise, so that the lower pad rises from the inside of the mold unit 505 and is demoulded.

[0118] Embodiment 2

[0119] The performance test steps for the elastomeric rail underpad product produced in Example 2 are as follows:

[0120] 1. Tensile strength and elongation at break

[0121] The specimens for the tensile strength and elongation at break tests are dumbbell-shaped. The specimens are divided into Type 1, Type 2, Type 3, Type 4 and Type 1A. Their standard lengths and thicknesses are shown in Table 1. The specimens are symmetrically clamped on the upper and lower clamps of the tensile testing machine to evenly distribute the tensile force on the cross section. The moving speed of Type 1, 2, and 1A specimens is 500mm / min±50mm / min, and the moving speed of Type 3 and Type 4 specimens is 200mm / min±20mm / min. The tensile strength is detected to be 40.68MPa and the elongation at break is 385.66%

[0122]

[0123] Table 1

[0124] 2. Static stiffness

[0125] The constant compression permanent deformation test was carried out according to the provisions of TB / T2626-1995. The sample was a pad product. The load was uniformly loaded at a speed of 2-3KN per second. The measured result was 162KN / mm.

[0126] 3. Constant compression permanent deformation test

[0127] The constant compression permanent deformation test is carried out according to the provisions of TB / T2626-1995. The specimen is a circular specimen with a center diameter of 30mm on the pad and the thickness of three points without grooves in the center of the specimen is tested. The average value is taken as the thickness before compression. The specimen is then compressed using a specimen machine and placed in an air aging tester.

[0128] 4. Test on compression deformation recovery of rail pad

[0129] A vertical load is applied to the pad by the testing machine, so that the pad surface is compressed and deformed, and the deformation is uniformly 1-3 mm, which is maintained for 10 minutes. Then the load is unloaded. After maintaining for 5 minutes, a digital vernier caliper is used to read the thickness of the pad near the four foot points of the pad and the midpoint of the two corresponding foot points in the horizontal direction. The average of the corresponding readings at the 6 points is the recovery value of the pad.

[0130] Through the above test method, multiple groups of product performance parameters are obtained as shown in Table 2:

[0131]

[0132] Table 2

[0133] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thermosetting elastomer rail pad injection molding production line, characterized in that: include: Forming unit; A mold filling unit, which is used for injecting material into the mold and is arranged on the top of the molding unit; A suction unit for extracting bubbles from the inside of the mold, the suction unit being arranged on the side of the mold filling unit; A pressing unit, for pressing and molding the mixed material inside the mold, the pressing unit being arranged on the side of the suction unit; A guide rail, which is used to guide the molds to be assembled and is arranged inside the molding unit; A mold removal unit, used for removing the mold from the lower pad formed by the mold, the mold removal unit is arranged on the top of the guide rail; The guide rail is guided by the lifting rail to lift the constraint frame to lift and squeeze the mold unit to close. After closing, the mold filling unit injects material into the mold unit. The upper trigger groove cooperates with the impact head on the outside of the constraint frame to periodically impact the mold unit, and cooperates with the suction unit to extract and eliminate bubbles. After the extraction is completed, the pressing unit presses the raw material of the mold unit. After pressing, the demolding track plate guides and pushes the demolding plate to rise, so that the lower pad automatically rises from the inside of the mold unit to demold.

2. The thermosetting elastomer rail pad injection molding production line according to claim 1, characterized in that: The guide rail includes a lifting rail, the lifting rail is arranged on the top of the guide rail and connected to the guide rail, a rotating belt is arranged on the inner side of the guide rail, and the rotating belt is movably connected to the inner wall of the molding unit through a power fixing plate; A rotating wheel is clamped inside the guide rail, and the rotating wheel is transmission-connected with a mobile power unit through a vertical column, and a movable sleeve is arranged at the bottom of the vertical column.

3. The thermosetting elastomer rail pad injection molding production line according to claim 2, characterized in that: The lifting rails are symmetrically distributed about the midline of the guide rails; The power fixing plate comprises a rotary drive unit, which is arranged at the bottom of the power fixing plate and is connected to the power fixing plate through a transmission belt and a rotary belt.

4. The thermosetting elastomer rail pad injection molding production line according to claim 2, characterized in that: The movable sleeve comprises limiting grooves, which are symmetrically arranged on both sides of the movable sleeve and are movably connected to the impact head through the side column; The side column is elastically connected to a hollow stop ring through an elastic member, and the hollow stop ring is arranged on a side of the movable sleeve away from the rotating wheel.

5. The thermosetting elastomer rail pad injection molding production line according to claim 4, characterized in that: A constraint frame is provided on the inner side of the movable sleeve; A mold unit is movably arranged inside the constraint frame, and the mold unit comprises a molding cavity arranged in the middle, a bottom plate arranged at the bottom, and an opening and closing plate arranged at the outside.

6. The thermosetting elastomer rail pad injection molding production line according to claim 5, characterized in that: The bottom plate is movably connected to the opening and closing plate via a transversely arranged rotating shaft, and the molding cavity is arranged on the top of the bottom plate and the inner side of the opening and closing plate for receiving the molding material; A bottom accommodating cavity is arranged inside the bottom plate, and a supporting connecting block is arranged at the bottom of the bottom plate.

7. The thermosetting elastomer rail pad injection molding production line according to claim 6, characterized in that: The bottom accommodating cavity is provided with a stripping plate movably disposed inside, the bottom end of the inner side of the opening and closing plate is provided with a bayonet matched with the thickness of the bottom plate, and the top side of the outer surface of the opening and closing plate is provided with a restraining block; The bottom of the stripping plate is connected with the bending plate through a pushing rod.

8. The thermosetting elastomer rail pad injection molding production line according to claim 7, characterized in that: The bending plates are symmetrically distributed about the center line of the push rod, rolling rollers are arranged opposite to the inner sides of the symmetrically arranged bending plates, and the inner sides of the power fixing plates are connected to the demoulding track plates through the extension columns; The demoulding track plate includes a lifting plate, which is arranged at the lower part of the lifting rail and is staggered in front and behind the projection of the lifting rail relative to the inner wall of the molding unit.

9. The thermosetting elastomer rail pad injection molding production line according to claim 1, characterized in that: The molding unit comprises an upper trigger groove and a lower trigger groove, the upper trigger groove is separately provided on the top side of the inner surface of the molding unit, and the lower trigger groove is separately provided on the bottom side of the inner surface of the molding unit; A clamping plate is symmetrically arranged at the bottom of the inner side of the molding unit, and the inner side of the clamping plate is movably connected with the collecting plate through a clamping groove.

10. A process for producing thermosetting elastomer rail bottom pads by injection molding of a thermosetting elastomer rail bottom pad injection molding production line according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: mold assembly: by lifting the constraint frame, the mold unit is closed and moved to the bottom of the mold filling unit 2 for injection preparation; Step 2: Material injection: the injection unit injects the mixed material into the molding cavity of the mold unit; Step 3: Vibration for uniform debubbling: The upper triggering groove pushes the impact head to impact the vibrating mold unit, so that the bubbles inside the mold unit rise and are discharged by the suction unit whose top descends to perform synchronous motion suction; Step 4: Thermosetting pressing: When the mold unit moves to the bottom of the pressing unit, the heated pressing unit moves downward to heat and press the material inside the mold unit to shape it; Step 5: Rising demoulding: The demoulding track plate pulls and pushes the demoulding plate to rise, so that the lower pad rises from the inside of the mold unit to demould.

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