CN101670639A - Fully automatic moulding press for moulding small plastic parts - Google Patents

Abstract

The invention discloses a fully automatic moulding press for moulding small plastic parts, which comprises a power device, a mould pressing device and a mould cooling system, wherein the mould pressing device comprises a main shaft, a lower bottom plate, a mould pressing seat and an upper cover board; the lower bottom plate is provided with a mould closing guide rail and a mould opening guide rail; the mould pressing seat comprises an upper turntable and a lower turntable which are connected into a whole by a spacer bush, and a plurality of mould pressing parts circumferentially uniformly distributed on the upper and lower turntables; each mould pressing part comprises an upper mould pressing part arranged on the upper turntable and a lower mould pressing part arranged on the lower turntable; the upper cover board is fixedly connected with the lower bottom plate through an upright post; and the center of a lower lateral surface of the upper cover board is fixedly provided with a centerrotary valve connected with the main shaft, and simultaneously one side of the lower lateral surface of the upper cover board is provided with a lug. The invention provides the fully automatic moulding press for moulding the small plastic parts, the mould pressing seat thereof adopts a double-layer structure, the mould pressing parts have less fittings, the failure rate is low when the fully automatic moulding press works, and the maintenance is convenient.

Description

Automatic Small Plastic Parts Forming Molding Machine

technical field

The invention relates to a small plastic part molding processing machine, in particular to a fully automatic small plastic part molding molding machine.

Background technique

The traditional production and processing of small plastic parts generally adopts injection molding process, which has been gradually eliminated by manufacturers due to problems such as low processing efficiency, large waste of raw materials, and poor surface smoothness of finished products. At present, there are many kinds of latest small plastic parts processing machines, such as the Chinese utility model patent with the publication number CN2521018, which is a plastic bottle cap forming molding machine. The whole device includes a molding device and a power device. Device connection, as shown in Figure 1 and Figure 2, wherein the molding device is composed of a main shaft 26', a molding seat 27', an upper cam connecting plate 28' and an upper cam 29', and several molding parts are evenly distributed on the molding device 3' , each molded part is composed of upper and lower large rollers 30', upper and lower small rollers 31', upper and lower roller pins 32', upper small roller lifting cams 33', pressure bar heads 34', connecting rods 35', butterfly springs 36', Upper mold intermediate shaft sleeve 37', connecting sleeve 38', upper mold connecting rod 39', compression spring 40', upper mold cover sleeve 41', upper mold 42', lower mold backing plate 43', lower mold 44', lower mold Die push rod 45', lower die intermediate shaft sleeve 46', butterfly spring 47', ejector head 48', ejector head connecting rod 49', lower cam seat 50', lower small roller track 51', lower cam 52 ′, frame 53 ′, bearing block 54 ′, bearing cap 55 ′ and gear 56 ′, and butterfly spring 47 ′ is connected with lower mold intermediate shaft sleeve 46 ′. Compared with the injection molding process, the compression molding machine has the advantages of improved production efficiency, no waste in the sprue, saving raw materials, low cost, reliable movement, accurate positioning, and smooth surface of the bottle cap. But at the same time, there is a problem of complex structure in the entire molding device. The molding seat is a four-layer board structure, and there are too many accessories for the molding parts, resulting in high manufacturing costs and high failure rates, resulting in difficulties in machine maintenance and maintenance. In addition, the mold clamping and mold opening of the upper and lower molds of each molding part are controlled by rails, and the resistance of the molding base is relatively large during operation, which leads to difficulty in controlling the precision of the product. In addition, the cooling system of the actual product in this patent is controlled by travel switches arranged on the outside of each molded part, resulting in a very cumbersome pipeline layout, which brings great inconvenience to maintenance and repair. Furthermore, the lower mold of each molded part adopts a sleeve-type telescopic structure, which requires regular addition of lubricating oil, which will be severely worn after a long time of work and will affect the quality of the finished product, and needs to be shut down for maintenance from time to time, which not only increases the Maintenance costs, but also reduce work efficiency.

Contents of the invention

The object of the present invention is to provide a full-automatic small-sized plastic molding molding machine, the molding seat adopts a double-layer structure, the molded parts have few accessories, the failure rate is low during operation, and it is easy to maintain and maintain.

To achieve the above object, the present invention adopts the following technical solutions:

Fully automatic small plastic molding molding machine, including a power unit and a molding unit connected to the power unit through a gear set, wherein the molding unit includes a main shaft, a lower bottom plate, a molding seat and an upper cover plate, and is characterized in that: the main shaft passes through the end The gear set at the top is connected with the motor; the lower bottom plate is fixed on the base of the molding press and remains stationary, and it is provided with a mold closing guide rail and a mold opening guide rail on the side opposite to the molding base; the molding base is kept in sync with the main shaft Rotation, the molded seat includes an upper turntable and a lower turntable connected by a spacer, and a number of molded parts evenly distributed on the upper and lower turntables, each of which includes an upper turntable set on the upper turntable And the lower mold pressing part arranged on the lower turntable, wherein the upper mold pressing part is composed of upper mold, core fixing rod, push rod linked with the upper die, "T" type linear bearing, and rollers arranged on the top of the push rod. The parts consist of the lower mold, the cavity slide bar and the large rolling bearing and the small rolling bearing arranged at the bottom of the cavity slide bar, wherein the large rolling bearing cooperates with the mold clamping guide rail, and the small rolling bearing cooperates with the mold opening guide rail; The lower bottom plates are fixed together, and the center of the lower side of the upper cover is fixed with a central rotary valve connected to the main shaft. At the same time, the lower side of the upper cover is provided with a bump that can touch the roller at the top of the push rod. The position is located directly above the highest point of the rising section of the clamping guide rail of the lower bottom plate.

The above-mentioned lower molding parts are connected with the lower turntable through linear bearings, linear bearing sleeves, retaining rings and oil seals.

The above-mentioned central rotary valve includes a rotary valve bearing, a rotary valve bearing seat, a valve body and a valve core. The entire central rotary valve is movably connected to the upper cover plate through a rotary valve fixing sleeve. The valve core is provided with cooling water holes and air holes; cooling The outlet of the water hole is an annular groove. Around the annular groove, there are evenly distributed water outlets on the upper circumference of the valve body. The number of water outlets is equal to that of the molded parts. The effect of synchronous cooling; the outlet of the air hole is a single hole, and the air outlets of the same number as the molded parts are evenly distributed around the circumference of the valve body on the same plane as the single hole, and each air outlet passes through the air pipe and the corresponding The upper mold connection of the molded part. When demoulding, the valve core automatically turns to the open and close position, and the air outlet is connected to achieve the effect of auxiliary demoulding, ensuring 100% demoulding and reducing the failure rate of the machine. When the demoulding is completed, the valve core automatically turns to close position, closing the airway.

The structure of the molding device of the present invention is greatly simplified, wherein the molding seat is a two-layer board structure, and the number of molded parts and accessories is greatly reduced, which reduces the manufacturing cost, has low failure rate, and facilitates the maintenance and maintenance of the machine. In addition, the clamping and opening of the upper mold of the molded part is realized by the push rod linked with the upper mold and the roller arranged on the top of the push rod combined with the bump arranged on the upper cover plate, and the molded part is closed when it passes through the bump When the mold is over the bump, the mold is opened and the material is unloaded, which greatly reduces the resistance of the molding seat, which is beneficial to the precision control of the product and the improvement of production efficiency.

The mold cooling system and auxiliary demoulding of the present invention are controlled by a central rotary valve that rotates synchronously with the molding seat. The rotary valve can realize continuous or intermittent cooling and intermittent air supply for demoulding. The entire pipeline layout is simple and clear, reducing the While reducing the failure rate, it is also easy to repair and maintain.

The telescopic structure of the lower molding part of the present invention adopts a linear bearing and a linear bearing sleeve, and the push rod of the upper molding part adopts a "T" type linear bearing. The application of this structure reduces the wear of the cavity slide rod and push rod, and improves the mold At the same time, the structure can be used permanently only by adding butter once during installation, without shutting down for maintenance, reducing maintenance costs and improving work efficiency.

Contents of the invention

Fig. 1, the schematic diagram of plane structure of prior art;

Fig. 2, a schematic diagram of the plane structure of the prior art II;

Fig. 3, the plane structure schematic diagram of the present invention;

Fig. 4, the enlarged schematic diagram of part A in Fig. 3 of the present invention.

Detailed ways

As shown in Figure 3 and Figure 4, the fully automatic small-sized plastic molding molding machine includes a power unit 1, a molding unit 3 connected to the power unit through a gear set 2, and a cooling system for the mould, wherein the molding unit 3 includes a main shaft 31, Lower bottom plate 32 , molding seat 33 and upper cover plate 34 .

The main shaft 31 is connected with the power unit motor 1 through the gear set 2 at the end. In the present invention, the gear set 2 is composed of a bull gear 21 and a driven pinion 22 , wherein the bull gear 21 and the main shaft 31 are fixedly connected through a stop washer 211 and a round nut 212 .

The lower bottom plate 32 is fixed on the base of the molding machine and remains stationary. It is sealed with the main shaft 31 by the main shaft seat 321, the oblique bearing 322, the bearing cover 323 and the oil seal block 324. A mold closing guide rail 325 and a mold opening guide rail 326 are arranged on it.

The molding base 33 keeps rotating synchronously with the main shaft 31, and the molding base 33 includes an upper turntable 5 and a lower turntable 6 integrally connected by a spacer 331, and several molding parts 7 whose circumferences are evenly distributed on the upper and lower turntables. The upper turntable 5 is fixedly connected to the main shaft 31 through an upper positioning sleeve 51 , and the lower turntable 6 is fixedly connected to the main shaft 31 through a lower fixing sleeve 61 . Each of the molding parts 7 includes an upper molding part 71 arranged on the upper rotating disk 5 and a lower molding part 72 arranged on the lower rotating disk 6, wherein the upper molding part 71 consists of an upper mold 711, a core fixing rod 712, and The push rod 713 linked by the upper mold, the "T" type linear bearing 714, and the roller 715 arranged on the top of the push rod are composed. The mold 711 is linked with the push rod 713 through the support 7113, and a return spring 7114 is arranged between the lock nut 7111 and the support 7113. The lower molding part 72 is composed of a lower die 721, a cavity slide bar 722 and a large rolling bearing 723 and a small rolling bearing 724 arranged at the bottom of the cavity slide bar. Mold opening guide rail 326 cooperates. In this embodiment, the lower mold 721 is movably connected with the lower turntable 6 through a linear bearing sleeve 7211 , a linear bearing 7212 , a retaining ring 7213 and an oil seal 7214 .

The upper cover plate 34 is fixedly connected with the lower base plate 32 through the column 35, and the center of the lower side of the upper cover plate 34 is fixedly provided with a cooling system connected to the main shaft 31. In the present invention, a central rotary valve 8 structure is adopted, and the upper cover plate One side of the lower side of the plate 34 is provided with a bump 341 that can touch the roller 715 at the top of the push rod 713, and the bump 341 is positioned directly above the highest point of the rising section of the mold clamping guide rail 325 of the lower base plate.

The structure of the molding device of the present invention is greatly simplified, wherein the molding seat 33 is a two-layer board structure, and the parts of the molding parts 7 are greatly reduced, which reduces the manufacturing cost, has low failure rate, and is convenient for machine maintenance and maintenance. In addition, the clamping and mold opening of the upper die 711 of the molded part is realized by the push rod 713 linked with the upper die and the roller 715 arranged on the top of the push rod in combination with the bump 341 arranged on the upper cover plate 34. Mold closing is carried out when the bump 341 is passed, and mold opening and blanking are carried out when the bump 341 is crossed, so that the resistance of the molding seat 33 is greatly reduced, which is beneficial to the precision control of the product and the improvement of production efficiency.

The mold cooling system and auxiliary demoulding of the present invention are controlled by the central rotary valve 8 which rotates synchronously with the molding seat 33 . The central rotary valve 8 includes a rotary valve bearing 81, a rotary valve bearing seat 82, a valve body 83 and a valve core 84. The entire central rotary valve is movably connected with the upper cover plate 34 through a rotary valve fixing sleeve 85. The valve core 84 is provided with Cooling water holes 841 and air holes 842 . The outlet of the cooling water hole 841 is an annular groove 8411. Around the annular groove 8411, there are water outlets 831 that are evenly distributed on the upper circumference of the valve body 83, and the number of molded parts 7 is equal. The upper mold of part 7 is connected to achieve the effect of synchronous and uniform cooling. The outlet of the air hole 842 is a single hole, and the valve body 83, which is located on the same plane as the single hole, is evenly distributed on the circumference of the valve body 83 and is provided with the same number of air outlets 832 as the molded parts 7. The upper mold connection of the molded part 7. When demoulding, the valve core 84 automatically turns to the opening and closing position, and the air outlet 832 is connected to achieve the effect of auxiliary demoulding, ensuring 100% demoulding and reducing the failure rate of the machine. When the demoulding is completed, the valve core 84 automatically Turn to the closed position to close the airway. When working, the rotary valve can realize continuous or intermittent cooling liquid delivery, intermittent air supply and demoulding. The whole pipeline layout is simple and clear, and it is easy to repair and maintain while reducing the failure rate.

The lower molding part 72 of the present invention is movably connected with the lower turntable 6 through the linear bearing sleeve 7211, the linear bearing 7212, the retaining ring 7213 and the oil seal 7214, and the push rod 713 of the upper molding part 71 adopts a "T" type linear bearing 714. The application reduces the wear of the cavity slide rod 722 and the push rod 713, and improves the precision of the mold. At the same time, the structure can be used permanently only by adding butter once during installation, without shutting down for maintenance, reducing maintenance costs and improving work efficiency.

Claims (3)

1. Fully automatic small-sized plastic molding molding machine, including a power unit, a molding unit connected to the power unit through a gear set, and a mold cooling system, wherein the molding unit includes a main shaft, a lower base plate, a molding seat and an upper cover plate, and is characterized in that : the main shaft is connected with the motor through the gear set at the end; the lower bottom plate is fixed on the molding machine base and remains motionless, and it is provided with a mold clamping guide rail and a mold opening guide rail on one side of the relative molding base; The molding seat and the main shaft keep synchronous rotation. The molding seat includes an upper turntable and a lower turntable connected by a spacer, and a number of molding parts evenly distributed on the upper and lower turntables. Each molding part includes a The upper molding part on the turntable and the lower molding part set on the lower turntable, wherein the upper molding part consists of the upper mold, the core fixing rod, the push rod linked with the upper die, the "T" type linear bearing, and the top of the push rod. The lower mold pressing part is composed of the lower mold, the cavity slide bar and the large rolling bearing and the small rolling bearing arranged at the bottom of the cavity slide bar, wherein the large rolling bearing cooperates with the mold clamping guide rail, and the small rolling bearing cooperates with the mold opening guide rail; The upper cover plate is fixedly connected with the lower base plate through the column, and the center of the lower side of the upper cover plate is fixed with a central rotary valve connected to the main shaft. The position of the protrusion is located directly above the highest point of the rising section of the clamping guide rail of the lower bottom plate. 2. The fully automatic molding machine for small plastic parts as claimed in claim 1, characterized in that the lower molding part is connected to the lower turntable through a linear bearing, a linear bearing sleeve, a retaining ring, and an oil seal. 3. The fully automatic small-sized plastic molding molding machine according to claim 1, characterized in that: the central rotary valve includes a rotary valve bearing, a rotary valve bearing seat, a valve body and a valve core, and the entire central rotary valve passes through the rotary valve The fixed sleeve is movably connected with the upper cover plate, and the valve core is provided with a cooling water hole and an air hole; the outlet of the cooling water hole is an annular groove, and the ring groove is evenly distributed on the upper circumference of the valve body. Each water outlet is connected to the upper mold of the corresponding molded part through a delivery pipe; the outlet of the air hole is a single hole, and molded holes are evenly distributed around the valve body on the same plane as the single hole. There are equal numbers of air outlets for the parts, and each air outlet is connected with the upper mold of the corresponding molded part through an air pipe.

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