CN100354090C

CN100354090C - Two step 'cold-hot-cold' agglutination process

Info

Publication number: CN100354090C
Application number: CNB2004100450457A
Authority: CN
Inventors: 赵仁杰; 严永林
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-15
Filing date: 2004-07-15
Publication date: 2007-12-12
Anticipated expiration: 2024-07-15
Also published as: CN1721151A

Abstract

The present invention relates to a two-step process. The 'cold-hot-cold' gluing technology of some special type artificial plates is improved to be the two-step process characterized in that 'hot-hot' gluing is firstly implemented in a hot press, and then, cold pressing shaping is implemented in a cold press. In addition, 'hot-hot' gluing time is the same as cold pressing shaping time. Therefore, a plate loader, the hot press, the cold press and a shim plate returning machine are arranged in series to form an aggregate unit which can cyclically operate. The structure of the hot press is the same as the structure of the cold press, and corresponding layers can move synchronously. Meanwhile, a metal shim plate which has a 'fish head' and a 'fish tail' and is particularly made is adopted. The method has the advantages that the output of the method is higher than that of two hot presses with the same type; heat energy and water consumption for cooling can be saved by at least 2/3. Thereby, product costs can be reduced.

Description

Two-step method " cold-hot-cold " gluing technique

Technical field the invention belongs to the gluing method in the wood-based plate field.

Technical background is present, in domestic some extraordinary Wood-based Panel Production, all adopts " cold-hot-cold " gluing technique.It is in a hot press by to the slab increasing temperature and pressure, heat-insulation pressure keeping and pressurize cooling three phases, the disposable gummed process of finishing.The advantage of this gluing technique is to guarantee that product has preferable quality, but exist pressing cycle long, yield poorly, energy consumption height particularly, the shortcoming that cooling water amount is big, thereby cause product cost higher.

The objective of the invention is under the prerequisite that guarantees extraordinary wood-based panel product quality, " cold-hot-cold " gluing technique to be divided into two steps to finish.In hot press, adopt " heat-heat " gluing technique to become plate earlier slab, in cold press, force cooling and shaping then.This two-step method " cold-hot-cold " gluing technique can improve output, cuts down the consumption of energy and reduces the cooling water amount, and then product cost is reduced.

Summary of the invention technical scheme of the present invention is as follows:

1. equipment requires and arrangement: with each one of loader, hot press, cold press, unloader and caul circulating system unit (also can without caul circulating system unit), being installed in series forms the associating unit of a job capable of circulation.Require the number of plies of loader, hot press, cold press and unloader identical, interlamellar spacing is supporting.And require the thickness of compressive plate of hot press and cold press to equate, and corresponding each layer energy synchronization action, but the gross pressure of cold press can be less than hot press.

2. in order to make backing plate in the hot press and top burr plate thereof enter cold press and unloader smoothly, realize two-step method " cold-hot-cold " gluing technique.Need specialized designs, make a kind of metal caul with " fish head " and " fish tail " structure, this metal caul is the intermediate openings at common metal backing plate front end " fish head ", and welds the steel plate of a band inclined-plane and perforation above it; One " fish tail " of end welding at the common metal backing plate has a pin that is the inclined-plane on it.The metal caul of this special construction by certain action, both can make two backing plates in hot press and the cold press interconnect from beginning to end, and the head and the tail of two backing plates in cold press and the unloader are broken away from mutually.

3. two-step method " cold-hot-cold " gluing technique operating process: on metal caul, carry out assembly, by caul circulating system unit (when not having caul circulating system unit, available artificial), metal caul and the slab on it are sent successively to each layer of loader, and backing plate is pushed in each layer of hot press (during hot press work together with slab is disposable by the push pedal device of loader, each laminate is by heating, remain in certain temperature range) the precalculated position time, " the fish head " of the backing plate front end tape punching of slab below, contact with " fish tail " of cold press burr plate below backing plate end, because the thrust of push pedal device, make the pin that is the inclined-plane on " fish tail " enter " fish head " and go up in the perforation on band inclined-plane, the head and the tail of two backing plates connect before and after forming.Make the pressing plate of hot press and cold press closed simultaneously and rapidly thereafter, and boost to separately predetermined pressure, in hot press, slab carried out " heat-heat " gummed respectively simultaneously and in cold press to the typing of colding pressing of the burr plate of heat, and make hot-press gluing identical with the time of finalizing the design of colding pressing.Step-down is simultaneously opened the pressing plate of hot press and cold press synchronously then, again by " fish head " on each layer backing plate in the plate pulling device clamping cold press of unloader, pulls backing plate and top burr plate thereof into each respective layer in the unloader cage unloading on the grillage.At this moment, the metal caul of each layer of hot press, owing to be connected with corresponding each layer backing plate of cold press respectively, also together with being dragged in corresponding each layer of cold press.By the decline of unloader cage, make " fish tail " of the backing plate that each layer cooled off in the cage (containing the burr plate above it) go up pin at last, under the effect of deadweight, break away from automatically " fish head " perforation of layer backing plate of each in entering cold press.At last backing plate is transported on the caul circulating system unit successively, carries out the assembly work of branch plate and next round, finish the course of work of two-step method " cold-hot-cold " gluing technique one-period to this.

4. two-step method " cold-hot-cold " gluing technique is as follows:

" heat-heat " gluing technique of the first step is when hot pressing temperature is 110 ℃-140 ℃, adopts three sections hot pressing modes to carry out, and the corresponding relation of each section pressure and time is:

The setting process of colding pressing in second step is under 0.3-1.0MPa pressure, and the logical cold water of pressing plate of cold press is forced cooling and typing, and the time of colding pressing is identical with " heat-heat " gluing time of the first step.

Compare with " cold-hot-cold " gluing technique of existing extraordinary wood-based plate, advantage of the present invention: the one, the output height, because the first step adopts " heat-heat " gluing technique, its hot-press gluing time is less than 1/2 of " cold-hot-cold " gluing time, and the shaping time of colding pressing in second step is identical with the first step, so the output of two-step method " cold-hot-cold " gluing technique is than the total output height of two same model hot presses; The 2nd, heat energy and more than 2/3 of cooling water water consumption can be saved, thereby product cost can be reduced significantly.

Description of drawings:

Accompanying drawing 1 is the equipment horizontal layout schematic diagram of two-step method " cold-hot-cold " gluing technique.

Accompanying drawing 2 is structural representations of the metal caul of belt fish head and fish tail.

Among the figure: 1 is caul circulating system unit; 2 is loader; 3 is hot press; 4 is cold press; 5 is unloader; 6 is the fish tail of metal caul end; 7 is metal caul; 8 is the fish head of metal caul front end; 9 for being the pin on inclined-plane on the fish tail; 10 is a perforation of being with on the inclined-plane steel plate of fish centriciput opening top welding.

Claims

1. the two-step method of extraordinary wood-based plate " cold-hot-cold " gluing technique is characterized in that pressing process order in the press that Liang Tai is installed in series of slab is finished; Earlier in hot press, carry out " Re-Re " and compose plate, in cold press, hot sheet is carried out the two-step process of cooling and shaping then;

A) described two-step process method, the characteristics aspect the equipment horizontal layout are that loader, hot press, cold press, unloader and caul circulating system unit are installed in series, and form the associating unit of a job capable of circulation; Require the basic structure of hot press and cold press identical simultaneously, and corresponding each layer energy synchronization action;

B) finish by order in the press that Liang Tai is installed in series for the pressing process of described slab, is to realize by the metal caul with " fish head " and " fish tail " structure; " fish head " intermediate openings of this metal caul front end, and weld the steel plate of a band inclined-plane and perforation above it; On the terminal fish tail of metal caul, a pin that is the inclined-plane is arranged; This metal caul with " fish head " and " fish tail " by certain action, both can make the head and the tail of two metal cauls in hot press and the cold press interconnect, and the head and the tail of two metal cauls in cold press and the unloader are separated;

C) described carry out in hot press " Re-Re " composes plate, and its technology is to be under 110 ℃～140 ℃ conditions in temperature, adopts three sections hot pressing modes to carry out, and the corresponding relation of each section unit pressure and time is as follows:

D) describedly in cold press hot sheet is carried out cooling and shaping, its technology is under the pressure of 0.1～1.0MPa, and the logical cold water of pressing plate of cold press is forced cooling and typing to hot sheet, and its cooling and shaping time is identical with " Re-Re " gluing time.