Double-die head for organic glass granulation and plate extrusion molding

Abstract

The utility model discloses a double-die head for organic glass granulation and plate extrusion molding, which comprises a die head cavity, a main channel for fluid materials to flow in is arranged in the die head cavity, and the main channel is respectively communicated with a granulation channel and a plate molding channel. Outlets of the granulation channel and the plate forming channel are respectively connected with a granulation die head and a plate forming die head, the die head cavity is respectively provided with mounting ports at inlets of the granulation channel and the plate forming channel, and the mounting ports are internally provided with hydraulic screen exchangers vertical to the material inflow direction; the hydraulic screen exchanger comprises a screen exchanger body, a hydraulic control system and a pressure sensor, the screen exchanger body is arranged in the mounting opening and controlled by the hydraulic control system, and the pressure sensor is arranged in the screen exchanger body and electrically connected with the hydraulic control system. Data can be transmitted through the pressure sensor, the flow of the molten mass can be conveniently adjusted, single production of granule and plate forming can be achieved, and double-channel synchronous production can also be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of organic glass granulation and plate extrusion molding, in particular to a double die head for organic glass granulation and plate extrusion molding. Background Art

[0002] Usually, PMMA granules are made by polymerizing MMA monomer as the main raw material and then extruding and pelletizing it through an extruder. PMMA sheets can be made by extruding the granules after melting them through an extruder, or by polymerizing MMA monomer as the main raw material and then extruding it through an extruder.

[0003] Existing molding dies can only meet the production needs of a single situation of pellet or sheet molding. Replacing the die is time-consuming and labor-intensive, and it is impossible to achieve synchronous production of pellet and sheet molding, which greatly increases production costs. Summary of the invention

[0004] In view of the existing problems, the utility model provides a double die head for organic glass granulation and plate extrusion molding which has a simple structure and can realize the synchronous production of granules and plate molding.

[0005] To achieve the above-mentioned purpose, the utility model provides the following scheme: a double die head for granulation and plate extrusion molding of organic glass, including a die head cavity, a main channel for fluid material to flow into the die head cavity is arranged, the main channel is connected to the granulation channel and the plate molding channel respectively, the outlets of the granulation channel and the plate molding channel are respectively connected to the granulation die head and the plate molding die head, the die head cavity is respectively provided with installation ports at the entrances of the granulation channel and the plate molding channel, a hydraulic screen changer perpendicular to the material inflow direction is installed in the installation port, the hydraulic screen changer includes a screen changer body, a filter plate is slidably clamped in the screen changer body, a filter mounting hole is arranged on the filter plate, through holes corresponding to the mounting port are arranged at the front and rear of the screen changer body, the screen changer body is arranged in the mounting port and the through hole, the mounting port and the filter mounting hole form a through fluid channel, one end of the filter plate is externally connected to a hydraulic control system to make the filter plate slide along its own length direction, a pressure sensor is arranged in the screen changer body, and the pressure sensor is electrically connected to the hydraulic control system.

[0006] The hydraulic control system further comprises a hydraulic cylinder, which is connected to the screen changer body through support bolts, and a piston rod arranged in the hydraulic cylinder is connected to one end of the filter plate.

[0007] Furthermore, the filter installation hole on the filter plate is a filter station, and the filter plate is also provided with a closed groove, which is a fully closed station.

[0008] The beneficial effects of the utility model are as follows: the double die head utilizes the main channel to respectively connect the granulation channel and the plate forming channel to form a double channel, the filter screen plate is configured as a filter screen and a fully enclosed double station, the hydraulic screen changer on the granulation channel or the plate forming channel can be selected to be in a fully enclosed station to carry out single working condition production, or both hydraulic screen changers can be placed in the filter screen station and the filter screen of the hydraulic screen changer on the plate forming channel can be replaced at the same time, thereby reducing the flow area and increasing the resistance of the plate forming channel, preventing all materials from gathering toward the die head at the plate forming end, thereby realizing the simultaneous production of granulation and plate forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the hydraulic screen changer structure.

[0011] Figure numerals: die cavity 1; main channel 2; granulation channel 3; plate forming channel 4; granulation die 5; plate forming die 6; installation port 7; screen changer body 8; hydraulic control system 9; pressure sensor 10; filter plate 11; filter mounting hole 12; through hole 13; hydraulic cylinder 14; support bolt 15; piston rod 16; closing groove 17; filter 18. DETAILED DESCRIPTION

[0012] like Figure 1 As shown, a dual die head for granulation and sheet extrusion molding of organic glass includes a die head cavity 1, a main channel 2 is arranged in the die head cavity 1, the main channel 2 is used for molten fluid to flow in, the main channel 2 extends backward and is respectively connected with a granulation channel 3 and a sheet forming channel 4, the outlets of the granulation channel 3 and the sheet forming channel 4 are respectively connected to a granulation die head 5 and a sheet forming die head 6, so as to form a dual channel for granules and sheet forming.

[0013] like Figure 1 and 2As shown, a mounting port 7 is provided at the entrance of the granulation channel 3 and the plate forming channel 4 in the die head cavity 1, and a hydraulic screen changer perpendicular to the fluid inflow direction is installed in the mounting port 7. The hydraulic screen changer includes a screen changer body 8, and a filter plate 11 is slidably clamped in the screen changer body 8. The filter plate 11 can slide in the screen changer body 8 by cooperating with the upper and lower sliding rails on the filter plate 11 and the slide groove in the inner wall of the screen changer body 8. A filter mounting hole 12 is provided on the filter plate 11, and a through hole 13 that is compatible with the mounting port 7 is provided at the front and rear of the screen changer body 8. The screen changer body 8 is fixed in the mounting port 7 by bolt connection, and the through hole 13 and the mounting port 7 are connected to each other. A fluid passage is formed through the filter mounting hole 12, a filter 18 is installed in the filter mounting hole 12, one side of the filter plate 11 is externally connected to the hydraulic control system 9, a pressure sensor 10 is provided in the screen changer body 8, the pressure sensor 10 is electrically connected to the hydraulic control system 9, the hydraulic control system 9 includes a hydraulic cylinder 14, the hydraulic cylinder 14 is connected to the screen changer body 8 through a support bolt 15, a piston rod 16 arranged in the hydraulic cylinder 14 is connected to one side of the filter plate 11, with the reciprocating motion of the piston rod 16, the filter plate 11 is driven to slide in the screen changer body 8 along its length direction, and a closed groove 17 is also provided on the filter plate 11, the filter mounting hole 12 is a filter station, The closed groove 17 is a fully closed position. When the filter 18 needs to be replaced, the piston rod 16 of the hydraulic system 9 pulls out the filter plate 11, and the filter installation hole 12 is exposed outside the screen changer body 8 to replace the filter 18. At this time, it is switched to the fully closed position. The switching of the double positions can be used to achieve a variety of working conditions. The hydraulic screen changer on the granulation channel 3 or the sheet forming channel 4 can be selected to be in the fully closed position, and the other channel can be in the filter position to perform granulation or sheet forming single working condition production. The pressure sensor 10 can monitor the pressure of the granulation channel 3 or the sheet forming channel 4 in real time and provide feedback. When the fluid flow rate needs to be controlled, the hydraulic control can be used. The piston rod 16 of the control system 9 pulls out the filter plate 11, and the filter 18 of the filter plate 11 is replaced with a filter of different apertures to adjust the flow rate. The hydraulic screen changer on the granulation channel 3 or the sheet forming channel 4 can also be placed in the filter position to carry out synchronous production of granules and sheet forming. Since the resistance of the sheet forming die 6 is relatively low, in order to prevent all the fluid from gathering to the sheet forming die 6, the filter of the hydraulic screen changer on the sheet forming channel 4 can be replaced according to the signal fed back by the pressure sensor 10 in the hydraulic screen changer on the granulation channel 3 and the sheet forming channel 4, so as to reduce the flow area at the sheet forming end and increase the resistance, thereby realizing synchronous production of granulation and sheet forming.

[0014] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A double die head for granulating organic glass and extruding a plate, comprising a die head cavity, characterized in that: The die head cavity is provided with a main channel for fluid material to flow in, the main channel is connected with a granulation channel and a plate forming channel respectively, the outlets of the granulation channel and the plate forming channel are connected to the granulation die and the plate forming die respectively, the die head cavity is provided with installation ports at the entrances of the granulation channel and the plate forming channel respectively, a hydraulic screen changer perpendicular to the material inflow direction is installed in the installation port, the hydraulic screen changer comprises a screen changer body, a filter plate is slidably clamped in the screen changer body, a filter mounting hole is provided on the filter plate, through holes corresponding to the installation port are provided at the front and rear of the screen changer body, the screen changer body is provided with through holes adapted to the installation port, the screen changer body is arranged in the installation port and the through hole, the installation port and the filter mounting hole form a through fluid channel, one end of the filter plate is externally connected with a hydraulic control system to make the filter plate slide along its own length direction, a pressure sensor is provided in the screen changer body, and the pressure sensor is electrically connected to the hydraulic control system.

2. The double die head for granulating and extruding organic glass according to claim 1, characterized in that: The hydraulic control system comprises a hydraulic cylinder, which is connected to the screen changer body through support bolts, and a piston rod arranged in the hydraulic cylinder is connected to one end of the filter plate.

3. The double die head for granulating and extruding organic glass according to claim 1, characterized in that: The filter installation hole on the filter plate is a filter station, and the filter plate is also provided with a closed groove, which is a fully closed station.

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