An environmentally friendly plastic injection mold

Abstract

The present invention belongs to the technical field of plastic injection molding, and specifically, is an environmentally friendly plastic injection mold; the main structure of the injection mold includes a mold frame, a fixed mold frame and a movable mold frame, the mold frame is connected to the ground through a bracket, the fixed mold frame is fixedly connected to the mold frame, and the movable mold frame is slidably connected to the mold frame; by controlling the opening and closing of the fixed mold frame and the movable mold frame, a workpiece removal space and a molding space are provided, one end of the mold frame is fixedly connected to a push rod seat, a plurality of limit arms are fixedly connected to the push rod seat through fasteners, a material taking assembly is rotatably installed between the plurality of limit arms, and the material taking assembly is used to take out the workpiece; the plastic product is prevented from being damaged during the removal process, thereby achieving the purpose of reducing the loss of plastic materials and reducing the product processing cost.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic injection molding, and specifically relates to an environmentally friendly plastic injection mold. Background Art

[0002] Plastics are widely used due to their light weight, high strength and chemical properties. The plastics industry is developing rapidly, but there is no proper way to deal with used plastics. If they are directly treated as solid waste, pollutants such as acid rain will form in the air, causing harm to our lives. In order to solve the above problems, degradable plastics can be used instead of non-degradable plastics, thereby reducing the damage of plastic products to the natural environment.

[0003] At present, degradable plastics are made from polymer materials such as cellulose, starch and chitin to produce biodegradable plastics or directly use raw materials such as PLA, PHA and PCL. The cost of PLA plastic is higher than that of traditional plastics. Therefore, for injection mold processing products using degradable materials as raw materials, it is necessary to further improve its yield rate and reduce the loss of plastic materials, thereby reducing product processing costs. Summary of the invention

[0004] In order to increase the yield rate of plastic injection molding and reduce the loss of plastic materials, the present invention adopts the following technical solutions:

[0005] The purpose of the present invention is to provide a solution that can set a material removal component during the removal operation of the plastic from the mold after injection molding, so as to prevent the plastic product from being damaged during the removal process, thereby achieving the purpose of reducing the loss of plastic materials and reducing the product processing cost.

[0006] The present application provides an injection mold with an additional material taking component. The main structure of the injection mold includes a mold frame, a fixed mold frame and a movable mold frame. The mold frame is connected to the ground through a bracket, the fixed mold frame is fixedly connected to the mold frame, and the movable mold frame is slidably connected to the mold frame.

[0007] By controlling the opening and closing of the fixed mold frame and the movable mold frame, a workpiece removal space and a molding space are provided. One end of the mold frame is fixedly connected to a push rod seat, and a plurality of limit arms are fixedly connected to the push rod seat by fasteners. A material removal assembly is rotatably installed between the plurality of limit arms, and the material removal assembly is used to remove the workpiece.

[0008] The main body of the material picking assembly is a material picking table, which is rotatably connected between multiple limit arms. Multiple windows are arranged on the material picking table, and the movable mold frame can pass through the windows and be buckled together with the fixed mold frame to provide a molding space for the workpiece.

[0009] The material-retrieving table is equipped with multiple connecting seats at the position without windows, and multiple slides are slidably connected to the peripheral sides of the connecting seats. The slides are equipped with clamping arms through adjustment frames. Multiple clamping arms are used to take out the workpieces. After the workpieces are cooled, the workpieces are removed from between the multiple clamping arms, thereby reducing the damage to the plastic products and reducing the loss of biodegradable plastic materials such as PLA, PHA, PCL and other raw materials during the injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following drawings are intended only to illustrate and explain the present invention, wherein:

[0011] Figure 1 It is a structural schematic diagram of the environmentally friendly plastic injection mold of the present invention;

[0012] Figure 2 It is a structural schematic diagram of the movable mold frame of the present invention;

[0013] Figure 3 It is a structural schematic diagram of the mold frame and the fixed mold frame of the present invention;

[0014] Figure 4 It is a structural schematic diagram of the pusher platform of the present invention;

[0015] Figure 5 It is a structural schematic diagram of the material taking platform of the present invention;

[0016] Figure 6 It is a schematic structural diagram of the limiting arm of the present invention;

[0017] Figure 7 It is a structural schematic diagram of the driving frame of the present invention;

[0018] Figure 8 It is a structural schematic diagram of the material taking platform and the slide table of the present invention;

[0019] Fig. 9 It is a structural schematic diagram of the connecting seat and the synchronous driving plate of the present invention;

[0020] Fig.10 It is a schematic structural diagram of the synchronous drive plate and the second rotation driver of the present invention;

[0021] Fig.11 It is a schematic diagram of the structure of the air bag and the trachea of ​​the present invention;

[0022] Fig.12 It is a schematic structural diagram of the slide table, the driving arm and the adjusting frame of the present invention.

[0023] In the figure: workpiece 1; mold frame 11; fixed mold frame 12; movable mold frame 13; pusher platform 14; pull rod 15; push rod 16; push rod seat 21; telescopic driver 22; limit arm 23; drive frame 24; first rotary driver 25; material taking platform 31; connecting seat 32; synchronous drive plate 33; second rotary driver 34; slide 41; drive arm 42; adjustment frame 43; pressure contact piece 44; clamp arm 45; eccentric disk 46; airbag 51; air pipe 52. DETAILED DESCRIPTION

[0024] The present application provides an environmentally friendly plastic injection mold, which temporarily places the workpiece by adding a material removal component to the mold body, so as to facilitate sufficient cooling of the workpiece, increase the yield rate of plastic injection molding, and reduce the loss of plastic materials:

[0025] The specific embodiments of the present invention are described below.

[0026] Reference Figure 1-4 As shown, an embodiment of the environmentally friendly plastic injection mold provided by the present invention is described, which is used for injection molding:

[0027] The environmentally friendly plastic injection mold includes a mold frame 11, a fixed mold frame 12 fixedly mounted on the mold frame 11, and a movable mold frame 13 slidably mounted on the mold frame 11, a push rod seat 21 is mounted on the mold frame 11, a telescopic driver 22 for driving the movable mold frame 13 to slide on the mold frame 11 is mounted on the push rod seat 21, and a movable end of the telescopic driver 22 is fixedly connected to the movable mold frame 13 by a fastener.

[0028] The telescopic driver 22 can be an electric telescopic rod or a hydraulic cylinder. By starting the telescopic driver 22, the movable mold frame 13 is driven to slide on the mold frame 11, thereby realizing the opening and closing operation between the fixed mold frame 12 and the movable mold frame 13.

[0029] The fixed mold frame 12 is provided with a flow channel opening, an injection molding machine is installed on the other side of the flow channel opening, and the material extrusion port of the injection molding machine is connected with the flow channel opening.

[0030] By controlling the opening and closing of the fixed mold frame 12 and the movable mold frame 13, a removal space and a molding space for the workpiece 1 are provided, and the material is injection molded into the workpiece 1 in the molding space formed when the fixed mold frame 12 and the movable mold frame 13 are closed.

[0031] A pushing platform 14 is slidably mounted on the movable mold frame 13, and a pulling rod 15 is provided on the pushing platform 14. The pulling rod 15 can penetrate the movable mold frame 13, and a notch is provided on the pulling rod 15, through which the residual material part of the workpiece 1 after injection molding is engaged and connected, so as to realize the positioning processing of the workpiece 1 after being pushed out.

[0032] The pushing platform 14 is provided with a plurality of pushing rods 16 which can penetrate the movable mold frame 13 , a spring is installed between the pushing platform 14 and the mold frame 11 , a pushing rod is slidably installed on the pushing rod seat 21 , the pushing rod is slidably connected in the circular hole of the movable mold frame 13 , and the end of the pushing rod seat 21 is abutted and connected with the pushing platform 14 .

[0033] A hydraulic rod for driving the push rod to slide is installed on the push rod seat 21, and the movable end of the hydraulic rod is fixedly connected to the push rod 16. By starting the hydraulic rod to extend, the push rod is driven to push the push rod seat 21, so that the multiple push rods 16 on the push rod seat 21 can disengage the workpiece 1 from the movable die frame 13;

[0034] After the workpiece 1 is released from contact with the movable mold frame 13 , the residual material of the workpiece 1 after injection molding can be engaged and connected with the notch on the drawing rod 15 to achieve positioning of the workpiece 1 , and the hydraulic rod is further started to extend to release the workpiece 1 from the drawing rod 15 .

[0035] The hydraulic rod and the telescopic drive 22 are used in combination to adjust the position of the movable mold frame 13 on the mold frame 11 so that the workpiece 1 can escape.

[0036] Reference Figure 4-7 As shown, an embodiment of the environmentally friendly plastic injection mold provided by the present invention is described, in which the material taking component is installed on the mold frame 11:

[0037] The mold frame 11 is provided with a material taking component for taking out the workpiece 1 , and the main body of the material taking component is a material taking platform 31 of an annular structure.

[0038] The material picking assembly is installed on the mold frame 11 through a push rod seat 21, and a plurality of limit arms 23 are fixedly connected to the push rod seat 21 through fasteners. Two cylinders are welded and fixedly connected to each limit arm 23. The material picking assembly is rotatably installed between the two cylinders on each limit arm 23, and the end of the material picking platform 31 is abutted against the limit arm 23, so that the material picking platform 31 is stuck between the plurality of limit arms 23.

[0039] Reference Figure 4-9 As shown, an embodiment of the environmentally friendly plastic injection mold provided by the present invention using a material taking component to take out a workpiece 1 is described:

[0040] The material taking platform 31 is provided with a plurality of windows, through which the movable die frame 13 can pass to be buckled with the fixed die frame 12 , thereby providing a molding space for the workpiece 1 .

[0041] A driving frame 24 is installed on the top rod seat 21, and a first rotating driver 25 is installed on the driving frame 24. A rubber driving wheel is installed on the output shaft of the first rotating driver 25 via a flat key or a wedge key. The rubber driving wheel is connected to the outer side of the material taking platform 31 via friction transmission. There are multiple driving frames 24.

[0042] The material-removing table 31 is fixedly connected to a plurality of connecting seats 32 by fasteners at a position where no window is provided, a plurality of slides 41 are slidably connected to the peripheral side of the connecting seat 32, a clamping arm 45 is installed on the slide 41 through an adjusting frame 43, and the end planes of the plurality of clamping arms 45 are respectively arranged flush with the peripheral side planes of the workpiece 1, and the number of slides 41, adjusting frames 43 and clamping arms 45 can be changed and set according to the number of side planes of the workpiece 1.

[0043] By starting the plurality of first rotary drivers 25 to drive the rubber driving wheel to rotate, the material taking platform 31 drives the connecting seat 32 to face the workpiece 1 when the fixed die frame 12 and the movable die frame 13 are opened, so as to perform subsequent workpiece 1 clamping operations.

[0044] A driving arm 42 is installed on the slide 41 , a synchronous driving plate 33 is rotatably connected to the connecting seat 32 , and a T-shaped column on the driving arm 42 is slidably connected to a sliding groove obliquely arranged on the synchronous driving plate 33 .

[0045] A second rotation driver 34 for driving the synchronous driving plate 33 to rotate is installed on the connecting seat 32 , and an output shaft of the second rotation driver 34 is connected to a rotating shaft of the synchronous driving plate 33 via a coupling.

[0046] By starting the second rotary driver 34, the synchronous driving plate 33 is rotated, which drives the T-shaped column on the driving arm 42 to slide in the inclined slide groove on the synchronous driving plate 33, so that the clamping arm 45 clamps the workpiece 1. In this process, the hydraulic rod and the telescopic driver 22 are used in conjunction to adjust the workpiece 1 disengagement position of the movable mold frame 13 on the mold frame 11, and the clamping operation of the multiple clamping arms 45 on the workpiece 1 is completed;

[0047] Then, the material taking platform 31 is controlled to rotate so that the workpiece 1 is separated from the drawing rod 15, and the workpiece 1 is taken out and temporarily stored for sufficient cooling.

[0048] Furthermore, the installation method between the adjustment frame 43 and the slide table 41 is improved:

[0049] The adjustment frame 43 is detachably mounted on the slide 41 by fasteners, so that the initial clamping positions of the plurality of clamping arms 45 are adjusted according to the shape of the workpiece 1 , and the distances between the plurality of clamping arms 45 and the side portions of the workpiece 1 are the same.

[0050] Reference Figure 9-12 As shown, an embodiment of the environmentally friendly plastic injection mold provided by the present invention is described, in which the clamping method of the workpiece 1 is improved to increase the anti-deformation performance of the workpiece 1:

[0051] The end of the clamp arm 45 is a bowl-shaped pressing platform structure, and an airbag 51 is installed in the clamp arm 45. The airbag 51 is fixedly connected to the clamp arm 45 by adhesive. An air tube 52 is arranged on the airbag 51, and the air tube 52 passes through the end of the clamp arm 45.

[0052] The edge of the bowl-shaped pressing platform is provided with an arc surface extending outwards to further prevent the workpiece 1 from being squeezed and deformed.

[0053] The clamp arm 45 is slidably connected to the adjustment frame 43, a tension spring is installed between the clamp arm 45 and the adjustment frame 43, a pressure contact piece 44 is installed on the adjustment frame 43, the clamp arm 45 is abutted against one side of the pressure contact piece 44, and the other side of the pressure contact piece 44 is connected to the pressure sensor.

[0054] The pressure sensor may be a semiconductor piezoresistive pressure sensor, which deforms the pressure contact piece 44 when pressure is triggered to generate piezoresistive impedance, and converts the impedance change into an electrical signal.

[0055] The air pipe 52 is connected to the air pump through a pipeline. When the air pump is started, the air bag 51 is expanded to perform a flexible clamping process on the workpiece 1.

[0056] When the synchronous driving plate 33 rotates to drive the multiple clamping arms 45 to clamp the workpiece 1, the pressure contact sheet 44 is used to detect the contact state between the clamping arms 45 and the workpiece 1, and then the synchronous driving plate 33 is controlled to flip. At this time, the workpiece 1 is clamped by the airbag 51. The contact between the airbag 51 and the workpiece 1 is flexible clamping. In this process, the clamping arms 45 are driven to slide on the adjustment frame 43. After the clamping arms 45 are in contact with the pressure contact sheet 44 again, the air injection into the airbag 51 is stopped and the internal pressure of the airbag 51 is maintained;

[0057] Switching between two clamping modes of the workpiece 1 through rotation of the synchronous drive plate 33 and inflation of the airbag 51;

[0058] When the synchronous driving plate 33 rotates to clamp the workpiece 1 , the workpiece 1 is stored in a state of being attached to the movable mold frame 13 .

[0059] When the workpiece 1 is clamped by inflating the airbag 51, the storage state of the workpiece 1 is that the residual material of the workpiece 1 after injection molding is connected with the notch on the drawing rod 15 by clamping;

[0060] By switching the clamping method of the workpiece 1 as described above, deformation damage to the workpiece 1 is further reduced.

[0061] Furthermore, an eccentric disk 46 is installed at the end of the clamp arm 45 so that the eccentric disk 46 partially blocks the airbag 51, so that during the expansion of the airbag 51, the action point of the airbag 51 and the workpiece 1 is offset, thereby increasing the removal effect of the workpiece 1 from the movable mold frame 13 and the pulling rod 15.

Claims

1. An environmentally friendly plastic injection mold, characterized in that: The mold frame (11) comprises a fixed mold frame (12) and a movable mold frame (13) mounted on the mold frame (11); a removal space and a molding space for a workpiece (1) are provided by controlling the fixed mold frame (12) and the movable mold frame (13) to open and close with each other; and a material removal component for removing the workpiece (1) is mounted on the mold frame (11); The mold frame (11) is provided with a push rod seat (21), a plurality of limit arms (23) are provided on the push rod seat (21), each limit arm (23) is fixedly connected to two cylinders, a material taking assembly is rotatably mounted between the two cylinders on each limit arm (23), and an end of the material taking assembly is abutted and connected to the limit arm (23); The material taking assembly comprises a material taking platform (31) of an annular structure, wherein a plurality of windows are provided on the material taking platform (31), and the movable die frame (13) can pass through the windows and be fastened together with the fixed die frame (12), thereby providing a molding space for the workpiece (1); A driving frame (24) is mounted on the push rod seat (21), a first rotating driver (25) is mounted on the driving frame (24), a rubber driving wheel is mounted on the output shaft of the first rotating driver (25) via a flat key or a wedge key, and the rubber driving wheel is connected to the outer side surface of the material taking platform (31) via friction transmission; The material taking platform (31) is provided with a plurality of connecting seats (32) at a position where no window is provided, a plurality of slides (41) are slidably connected to the peripheral side of the connecting seats (32), a clamping arm (45) is provided on the slide (41) via an adjusting frame (43), and the end planes of the plurality of clamping arms (45) are respectively arranged flush with the peripheral side plane of the workpiece (1); By starting a plurality of first rotary drivers (25), the rubber driving wheel is driven to rotate, so that when the fixed die frame (12) and the movable die frame (13) are opened, the material taking platform (31) drives the connecting seat (32) to face the workpiece (1), thereby performing a subsequent workpiece (1) clamping operation.

2. The environmentally friendly plastic injection mold according to claim 1, characterized in that: The movable mold frame (13) is slidably connected to a pusher platform (14), the pusher platform (14) is provided with a plurality of push rods (16) capable of penetrating the movable mold frame (13), a spring is installed between the pusher platform (14) and the mold frame (11), a push rod is slidably installed on a push rod seat (21), the push rod is slidably connected in a circular hole of the movable mold frame (13), and an end of the push rod seat (21) is abutted against the pusher platform (14).

3. The environmentally friendly plastic injection mold according to claim 2, characterized in that: A telescopic driver (22) for driving the movable mold frame (13) to slide on the mold frame (11) is installed on the push rod seat (21), and a movable end of the telescopic driver (22) is fixedly connected to the movable mold frame (13).

4. The environmentally friendly plastic injection mold according to claim 2, characterized in that: The pushing platform (14) is provided with a pulling rod (15), which can penetrate the movable mold frame (13). The pulling rod (15) is provided with a notch, and is engaged with the residual material of the workpiece (1) after injection molding through the notch to achieve positioning processing of the workpiece (1) after being pushed out.

5. The environmentally friendly plastic injection mold according to claim 1, characterized in that: A driving arm (42) is mounted on the slide table (41), a synchronous driving plate (33) is rotatably connected to the connecting seat (32), and the driving arm (42) is slidably connected to a sliding groove obliquely arranged on the synchronous driving plate (33).

6. The environmentally friendly plastic injection mold according to claim 1, characterized in that: The adjustment frame (43) is detachably mounted on the slide table (41) via fasteners.

7. The environmentally friendly plastic injection mold according to claim 5, characterized in that: A second rotary driver (34) for driving the synchronous drive plate (33) to rotate is mounted on the connection seat (32); an output shaft of the second rotary driver (34) is connected to a rotating shaft of the synchronous drive plate (33) via a coupling.

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