CN2402461Y

CN2402461Y - Plate hot press

Info

Publication number: CN2402461Y
Application number: CN 00216235
Authority: CN
Inventors: 赵应樾; 王凯明; 陈松梅
Original assignee: 赵应樾
Priority date: 2000-01-20
Filing date: 2000-01-20
Publication date: 2000-10-25
Anticipated expiration: 2010-01-20

Abstract

The utility model relates to a novel plate hot press, which comprises a machine frame, a hot plate, a heater, a hot plate follow block, a cover cylinder structure and a liquid charging device, wherein the cover cylinder structure is composed of a hydraulic cylinder, a gland cover, a hollow drivepipe, a plunger blind hole, a sealing ring, etc., and the liquid charging device is composed of a C cavity piping line, a D cavity piping line, and a hydraulic control valve which is connected between the two piping lines. The utility model cancels a motor group of a low-pressure pump and an accumulator group, and the outfitted power of the complete machine is reduced by more than a half under the condition of the improvement on the production efficiency. The utility model has the characteristics of energy saving, rapidity and easy fabrication. The technical innovation of the original hot press can be carried out by the utility model.

Description

A kind of novel flat-plate hot press

The utility model is that dull and stereotyped hydraulic press is processed in a kind of hot pressing that is used for wood gluing, the vulcanization of rubber.

Especially utilize the gravity release after the upper and lower material of multilayer flat plate heat and the dull and stereotyped closed heating and descend naturally and locate in order to adapt to flat plate heat, all hot presses all adopt the single-acting plunger type hydraulic cylinder of underlying, upwards push the structural shape of flat plate heat." hydraulic system of hot press mainly is made up of following part: (1) high-pressure pump; After the heating platen closure, fill hydraulic oil, make the operating pressure that reaches regulation to oil cylinder.(2) low-lift pump; For a large amount of low pressure oil, make the pressing plate quick-make to oil cylinder.(3) accumulator; Gas-liquid directly contacts accumulator, and its effect is to supply a large amount of low pressure oil at short notice to give oil cylinder, makes the heating platen quick-make ".(seeing that the practical complete works of editorial board of China Forest portion timber industry writes, " timber industry is practical complete works of " (particieboard hot press chapter), P193 page or leaf,, China Forest publishing house in 1998).Should be understood that, flat-bed press as key equipment in the production lines such as particieboard, glued board, core-board, decorative panel, in the preformer of its preceding working procedure, adopt the mechanism that relies on the quick topping up of briquetting gravity already and save low-lift pump, but this preformer is the same with the hydraulic press of forging and pressing metal material, be on the hydraulic cylinder put, the cylinder bar is to the structure of the double-acting piston hydraulic cylinder that presses down, but not the aforementioned structure that flat-bed press requires.Although preformer just is installed in the front of flat-bed press, described just as " timber industry is practical complete works of " even to this day, hot press is still and relies on low-lift pump that big flow low pressure oil is provided, and makes the pressing plate quick-make.Although " forging machine tool of the usefulness of processing metallic have adopted charging device and obtained suitable fast energy-saving effect.The high-efficiency and energy-saving type compression molding hot press of charging device does not but appear adopting in purl machine industry as yet both at home and abroad but up to now, " (referring to " hydraulic cylinder commonly used and its repairing ", P85 page or leaf; Zhao Yingyue chief editor; 1996, publishing house of Shanghai Communications University, national scientific and technological bibliography 365-259).

In the prior art, the last top operating rate of flat-bed press is constantly equal to the merchant of oil feed pump flow divided by plunger cross-sectional area gained.For accelerating the purl machine closing speed, all adopt high-pressure pump to add the fuel feeding scheme of low pressure and mass flow pump again, also increase huge accumulator group in the super-huge hot press again.Low pressure and mass flow pump price is not honest and clean, also needs Motor Drive, and power outfit and power consumption are bigger, also need maintenance cost every year; And accumulator system itself and annex price are expensive, and volume is big, occupation of land is many, are unfavorable for the layout of the workshop confined space.

The purpose of this utility model provides a kind of under hydraulic cylinder cylinder diameter, length specification permanence condition, both without low pressure and mass flow pump---motor unit, again without accumulator, complete machine is equipped with power significantly to be reduced, but can meet or exceed former working ability a kind of with the novel energy-conserving of cover cylinder structure and charging device, flat-bed press fast.

The utility model provides a kind of novel flat-plate hot press, comprise frame, flat plate heat, heater, hydraulic cylinder, the flat plate heat piece that puts in place, the cover cylinder lumen system that the cylinder body lower end that it is characterized by hydraulic cylinder is connecting the cover cylinder structure that sealing ring constituted between sealing gland, the connected hollow sleeve in sealing gland inner face center, the plunger that is shaped on blind hole, hollow sleeve and the plunger that is shaped on center oil through and side position oil through and is being formed by connecting by the external oil duct of center oil through, check valve, high-pressure pump; The annular chamber piping that the external oil duct of side position oil through, prefill valve, fuel tank are formed by connecting and be connected across the external oil duct of center oil through and the external oil duct of side position oil through between the charging device formed of hydraulic control valve.

Accompanying drawing 1 is a kind of contour structures schematic diagram of the present utility model;

Fig. 2 is embodiment section and hydraulic schematic diagram in the hot press of configuration single cylinder;

Fig. 3 is other embodiment and hydraulic schematic diagram in the hot press of configuration two cylinders.In the accompanying drawing:

The 1-frame; The 2-flat plate heat; The 3-heater; The 4-high-pressure pump; The 5-hydraulic cylinder; The 6-sealing gland; The 7-hollow sleeve; The 8-plunger; The 9-sealing ring; The 10-prefill valve; The 11-fuel tank; The 12-sealing ring; The 13-check valve; The 14-oil return valve; The 15-hydraulic control valve; 16-flat plate heat tray;

A---the center oil through that is communicated with the C chamber; B---the side position oil through that is communicated with annular chamber D; C---cover cylinder chamber; The annular chamber of D---hydraulic cylinder 5; E---be communicated with the external oil duct in A hole of check valve 13; F-is communicated with the external oil duct in B hole of prefill valve 10.

Below in conjunction with drawings and Examples the utility model is further illustrated its details characteristics, operation principle and course of action: main hydraulic cylinder 5 usefulness thick walled steel tubes are welded, also available cast steel or high-strength ductile cast iron are cast, and its working surface machining accuracy and surface roughness require consistent with existing with hot press.The cylinder body lower surface of hydraulic cylinder 5 and the sealing gland 6 quenched and tempered steel Bolt Connection that is shaped on central through hole A and side position through hole B are embedded with sealing ring 12 in its composition surface.Gland 6 material therefors and cylinder 5 roughly the same, gland 6 inner centers are connecting hollow sleeve 7 with flexible methods such as rigidly connected method such as gas thread, flange or welding and tube socket, universal spherical joint formulas.

For the bigger sleeve pipe 7 of diameter, easy to process because of blind hole in the plunger 8, can directly in neck hole, plunger 8 lower end, process hole slot, so that sealing ring 9 (see figure 2)s to be installed.Hollow sleeve 7 is passed in the hole that sealing ring 9 is inserted in plunger 8, gland 6 is connected on the hydraulic cylinder 5, just finished the cover cylinder structure.If hollow sleeve 7 diameters are less, often plunger 8 is made combined type.Be about to be complete plunger 8, the form shown in left side section in the accompanying drawing 3 with screw etc. is fixed with the plunger lower end of sealing ring 9 and piston body.In super-huge hot press, can also make the piston cylinder operator shown in the right side sectional view in the accompanying drawing 3, promptly sealing ring 9 is installed in the slotted eye at big convex shoulder piston place of hollow sleeve 7, form the structure of cover cylinder.

In the embodiment of Fig. 2 and Fig. 3, check valve 13 entrance points are connecting the delivery outlet of high-pressure pump 4, and the port of export of valve 13 is connected with the A hole with pipeline e, form the C lumen system of a supply pressure oil thus; The outlet of prefill valve 10 is communicated with the B hole with pipeline f, in the position of oil inlet pipe connection below fuel tank 11 pastas of prefill valve 10, forms the D lumen system of a topping up.Prefill valve 10 can be selected the commercially available check valve among Fig. 2 for use, also can select commercially available hydraulic control one-way valve for use, also can select the commercially available automatically controlled unidirectional inserted valve among Fig. 3 for use.Adopt in the prefill valve 10 among Fig. 3 and comprise that the magnetic valve of electromagnetic ball formula seat valve handles unidirectional plug-in unit.

The commercially available hydraulic control valve of cross-over connection between e, f two pipes, the one way sequence valve among available Fig. 2; Also can adopt the automatically controlled off-load sequence valve among Fig. 3, can also adopt the solenoid directional control valve of commercially available Position Control.

Among the embodiment of the hot press of the hydraulic cylinder of configuration shown in the accompanying drawing 2, its course of work and operating principle are as follows:

The flat plate heat quick-make, be that plunger 8 is gone up the top fast: pump 4 starts, the pressure oil of output is by check valve 13, e pipe, A hole and hollow sleeve 7 enter the C chamber, because of hollow sleeve 7 diameters are far smaller than cylinder diameter,, make the flat plate heat quick-make so plunger 8 is pushed rapidly, at this moment the D chamber forms negative pressure, and the fluid in the fuel tank 11 is pushed prefill valve 10 open and mended the D chamber under atmospheric pressure.

Add the high pressure pressurization in hot gluing, when sulfuration: pump 4 remains in operation, the flat plate heat rapid closing, and oil pressure hurriedly rises, and (2MPa～20MPa), open at valve 15 sequence valve positions, and hydraulic oil enters the D chamber thus after reaching the set pressure in the control valve 15.And, forbid that hydraulic oil returns fuel tank as the common check valve backward stop of prefill valve 10, this moment, the hydraulic gross area of plunger equated with technology with existing, the finishing of assurance pressurization task.

Descend: handle oil return valve 14, under flat plate heat and plunger deadweight effect, C chamber trapped fuel and the D chamber trapped fuel that passes through hydraulic control valve 15 check valves part return fuel tank 11 by heavy caliber oil return valve 14 together.In addition, pressurize operation is same as prior art.

High tonnage hot press often has the situation of configuration multi-cylinder, only needs in its charging device the e pipe of all hydraulic cylinder is in parallel, the f pipe of all cylinders also is in parallel, as shown in Figure 3 just.

Operation principle and course of action among accompanying drawing 3 embodiment are as follows:

Plunger pushes up soon: pump 4 starts, pressure oil is by check valve 13, e pipe, enter two cylinder C chambeies simultaneously, plunger 8 F.F.s also form the negative pressure state in two cylinder D chambeies, this moment, the magnetic valve on prefill valve 10 tops was not switched on, and plug-in unit is lifted in the valve 10, and fluid arrives the f pipe from fuel tank 11, enter two cylinder D chambeies and topping up, flat plate heat is able to quick-make.

Pressurization: control valve 15 is selected commercially available automatically controlled off-load sequence valve shown in Figure 3 for use, and its electromagnetic priority valve still is in power down bit shown in Figure 3.After the flat plate heat quick-make, pump 4 remains in operation, press on C chamber and the e pipe, its pressure reaches in the valve 15 behind the set pressure, sequence valve position in the valve 15 is opened, and e pipe pressure oil enters two cylinder D chambeies by the f pipe, and prefill valve 10 plug-in units are closed automatically, the two cylinders active area of exerting pressure equates with prior art, finishes pressurization and pressurize.Because corresponding to the unlatching set pressure of valve 15 sequence valves part, flat plate heat 2 and plunger 8 have a definite upward position, so control valve 15 also can use the commercially available solenoid directional control valve of being implemented to handle by this position to serve as.

Descend: behind conducting prefill valve 10 and hydraulic control valve 15 pilot solenoid valve separately, valve 10 plug-in units lift, usefulness as oil return, valve 15 also conducting between e, f, under the gravity effect, by valve 10 oil sump tanks 11, C chamber trapped fuel enters f from the e pipe by valve 15 and manages oil sump tank simultaneously two cylinder D chamber trapped fuel from the f pipe.Plunger descends until assigned position.

Now as in the YJ48-450 type 450t hot press, adopt the twin-tub of plunger  360mm, plunger total kilometres 1m, impulse stroke is by 0.7m, one of one of existing low-lift pump employing YB-E200 vane pump or NB5C-200F conjugate crescent seal gear pump, adapted 11kW four-pole motor, high pressure adopts one of the quantitative high-pressure plunger pump of 10MCY14-1B type, also drive with the 11kW four-pole motor, complete machine is equipped with general power 22kW.Its dull and stereotyped quick-make time is 27 seconds.If use the utility model instead, the plunger bushing cylinder structure of  100mm center sleeve, high-pressure pump 4 are only used the permanent power hydraulic pump of a commercially available 25YCY14-1B type high pressure variable, its output characteristics when being low pressure big flow fuel-displaced, low discharge is fuel-displaced during high pressure, the power output substantially constant.This hot press is except that equally reaching the gross pressure only 18 seconds flat plate heat quick-make time like this.The driving power of pump 4 is below 7.5kW, and it only is original 1/3rd that complete machine is equipped with power.The utility model has also been saved the expense of buying low-lift pump and motor except that the effect that can obtain fast energy-saving, and to all technical application transformations easily of original hot press.

Claims

1, a kind of novel flat-plate hot press, comprise frame, flat plate heat, heater, hydraulic cylinder, the flat plate heat piece that puts in place, the cover cylinder lumen system that the cylinder body lower end that it is characterized by hydraulic cylinder is connecting the cover cylinder structure that sealing ring constituted between sealing gland, the connected hollow sleeve in sealing gland inner face center, the plunger that is shaped on blind hole, hollow sleeve and the plunger that is shaped on center oil through and side position oil through and is being formed by connecting by the external oil duct of center oil through, check valve, high-pressure pump; The annular chamber piping that the external oil duct of side position oil through, prefill valve, fuel tank are formed by connecting and be connected across the external oil duct of center oil through and the external oil duct of side position oil through between the charging device formed of hydraulic control valve.

2, according to a kind of novel flat-plate hot press of claim 1, it is characterized by high-pressure pump is the permanent power hydraulic pump of a kind of high pressure variable.