CN202293250U

CN202293250U - High-speed die opening/closing hydraulic loop system

Info

Publication number: CN202293250U
Application number: CN201120408735XU
Authority: CN
Inventors: 黄土荣; 莫品荣; 李明; 李晓静
Original assignee: GUANGZHOU BORCHE MACHINERY CO Ltd
Current assignee: Borch Machinery Co Ltd
Priority date: 2011-10-17
Filing date: 2011-10-17
Publication date: 2012-07-04
Anticipated expiration: 2021-10-17

Abstract

The utility model discloses a high-speed die opening/closing hydraulic loop system which is characterized by consisting of a power system, a die opening/closing valve, a one-way valve, a die opening/closing oil cylinder and an energy accumulator system, wherein the die opening/closing valve is connected with the power system and the die opening/closing oil cylinder, and the one-way valve is connected with an oil inlet of the die opening/closing valve to form a differential loop; the oil inlet of the die opening/closing valve is connected with a pressure port of the energy accumulator system at the same time so as to realize a high-speed die opening/closing function; and a safety valve and a safety pilot valve are connected in series between the die opening/closing valve and the die opening/closing oil cylinder to realize a die opening/closing safety protection function. The high-speed die opening/closing hydraulic loop system disclosed by the utility model has a simple and effective structure, remarkably increases the die opening/closing speed, shortens the die opening/closing time, improves the production efficiency and has the advantages of die protection function and the like.

Description

A kind of high speed folding mould hydraulic circuit system

Affiliated technical field

The utility model relates to a kind of hydraulic circuit system, high speed folding mould circuit system on especially a kind of injection machine.

Background technology

Traditional injection machine folding mould hydraulic circuit is a common electromagnetic direction valve control Mode-locking oil cylinder, and folding mould speed is lower, and the injection machine work period is longer.Along with the raising of the level of manufacturing, require the product molding cycle constantly to dwindle, folding mould speed improves constantly, and has required to meet or exceed 500mm/s for high speed folding mould maximal rate.Traditional injection machine has been difficult to the speed that reaches such, and such high-speed of especially stable control often can produce bigger impact and vibrations in the high speed motion process.

Summary of the invention

The utility model technical problem to be solved: overcome the above-mentioned deficiency of prior art and when the action of a kind of high speed folding mould is provided, and can effectively control the folding mould hydraulic circuit system of high speed impact and vibrations.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of high speed folding mould hydraulic circuit system, said system comprises dynamical system, folding mould valve; Check valve, folding mould oil cylinder and accumulator system form, and wherein the pressure hydraulic fluid port of folding mould valve links to each other with dynamical system; First actuator port of folding mould valve links to each other with the rodless cavity of folding mould oil cylinder; Second actuator port links to each other with the rod chamber of folding mould oil cylinder, and check valve links to each other with the pressure hydraulic fluid port of folding mould valve, forms differential circuit; The pressure hydraulic fluid port of folding mould valve links to each other with the pressure hydraulic fluid port of accumulator system simultaneously, realizes high speed folding mould function; Safety valve and safe pilot valve are series in the middle of folding mould valve and the folding mould oil cylinder, realize folding mould safety protection function.

Described folding mould valve is four four-way proportioning valves or 3-position 4-way high frequency response proportioning valve, and dynamical system is Constant Pump System or variable pump systems, or the servo power system, and wherein the outlet of the pressure oil of dynamical system includes non-return valve function.Described accumulator system can be made up of an accumulator and overflow valve, stop valve, also can add overflow valve by a plurality of accumulators, stop valve is formed.Safety valve is made up of the safe inserted valve of band feedback, also can be made up of common inserted valve or security solenoid valve.

The beneficial effect of the utility model:

1. a high speed folding mould hydraulic circuit system reduces the folding mould time, enhances productivity;

2. high speed folding mould hydraulic circuit system has mould protection and die sinking back pressure function, in order to avoid mold damage or goods during the injection machine automated production;

3. a high speed folding mould hydraulic circuit system has the accumulator system, and folding mould speed can meet or exceed 500mm/s.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the utility model.

Be labeled as among the figure: 1. dynamical system; 2. folding mould valve; 3. check valve; 4. folding mould oil cylinder; 5. safety valve; 6. safe pilot valve; 7. accumulator system.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As shown in the figure, a kind of high speed folding mould hydraulic circuit system is characterized in that dynamical system (1); Folding mould valve (2), check valve (3), folding mould oil cylinder (4) and accumulator system (7) form; Wherein the P2 mouth of folding mould valve (2) links to each other with dynamical system (1), and the A2 mouth of folding mould valve (2) links to each other with the rodless cavity of folding mould oil cylinder (4), and the B2 mouth links to each other with the rod chamber of folding mould oil cylinder (4); Check valve (3) links to each other with the P2 mouth of folding mould valve (2), forms differential circuit; The P2 mouth of folding mould valve (2) links to each other with the pressure port of accumulator system (7) simultaneously, realizes high speed folding mould function; It is middle with folding mould oil cylinder (4) that safety valve (5) and safe pilot valve (6) are series at folding mould valve (2), realizes folding mould safety protection function.

Described a kind of high speed folding mould hydraulic circuit system is characterized in that folding mould valve (2) is four four-way proportioning valves or 3-position 4-way proportioning valve; Dynamical system (1) is Constant Pump System or variable pump systems, or the servo power system, and wherein dynamical system (1) pressure export includes non-return valve function.

During mould assembling action, the pressure hydraulic fluid port of accumulator system (7) keeps the operating pressure that designs always, and folding mould valve (2) is the high frequency response proportioning valve; The P2 mouth leads to the A2 mouth; But opening degree is less, can only allow low discharge to pass through, and pressure oil is through folding mould valve (2); Through the rodless cavity of safety valve (5) arrival die cylinder (4), realize the matched moulds slow start; After mould assembling action is moved; The logical A2 mouth opening of folding mould valve (2) P2 mouth increases to maximum, and B2 leads to the also corresponding increase of T2 opening, and the rod chamber oil return of folding mould oil cylinder (4) is through check valve (3) simultaneously; Arrive the P2 mouth of folding mould valve (2); Get back to the rodless cavity of folding mould oil cylinder (4) then, realize differential high speed loop, realize the high speed mould assembling action; During near closure state, the logical A2 mouth opening of folding mould valve (2) P2 mouth reduces once more at mould, and simultaneously, B2 is logical, and the T2 opening is corresponding also reduces, and closure pressing speed reduces rapidly, realizes that low pressure molding at a slow speed protects function; Under the normal condition, folding mould oil cylinder (4) realizes that under effect of inertia mould closes up, and folding mould valve (2) is realized high-voltage lock mould through hydraulic oil, produces enough clamp forces.If can mould occur that goods, the mouth of a river do not come off fully or when other foreign matters are arranged; Moving platen meets obstructions under effect of inertia, can't advance, behind the guard time (generally being set at 3S) that exceeds low pressure molding guarantor setting; Folding mould valve (2) is realized the die sinking action, and the protection mould is not damaged.

During die sinking, folding mould valve (2), the P2 mouth leads to the B2 mouth, the logical T2 effected die sinking action of A2 mouth.

A kind of high speed folding mould hydraulic circuit system; The P2 mouth of described folding mould valve (2) links to each other with dynamical system (1); The A2 mouth of folding mould valve (2) also can link to each other with the rod chamber of folding mould oil cylinder (4); The B2 mouth links to each other with the rodless cavity of folding mould oil cylinder (4), and when matched moulds and die sinking were moved like this, folding mould valve (2) control mode was opposite with above-mentioned explanation.

A kind of high speed folding mould hydraulic circuit system significantly improves folding mould speed, has the accumulator system, and folding mould speed can meet or exceed 500mm/s, can effectively reduce the folding mould time, enhances productivity; And have mould protection and die sinking back pressure function, in order to avoid mold damage or goods during the injection machine automated production.

Claims

1. high speed folding mould hydraulic circuit system; It is characterized in that dynamical system (1), folding mould valve (2), check valve (3); Folding mould oil cylinder (4) and accumulator system (7) form; Wherein the pressure actuator port of folding mould valve (2) links to each other with dynamical system (1), and first actuator port of folding mould valve (2) links to each other with the rodless cavity of folding mould oil cylinder (4), and second actuator port links to each other with the rod chamber of folding mould oil cylinder (4); Check valve (3) links to each other with the pressure actuator port of folding mould valve (2), forms differential circuit; The pressure actuator port of folding mould valve (2) links to each other with the pressure hydraulic fluid port of accumulator system (7) simultaneously, realizes high speed folding mould function; It is middle with folding mould oil cylinder (4) that safety valve (5) and safe pilot valve (6) are series at folding mould valve (2), realizes folding mould safety protection function.

2. a kind of high speed folding mould hydraulic circuit system as claimed in claim 1 is characterized in that folding mould valve (2) is four four-way proportioning valves or 3-position 4-way proportioning valve; Dynamical system (1) is Constant Pump System or variable pump systems, or the servo power system, and wherein dynamical system (1) pressure export includes non-return valve function.

3. a kind of high speed folding mould hydraulic circuit system as claimed in claim 1 is characterized in that accumulator system (7) can be made up of an accumulator and overflow valve, stop valve, also can add overflow valve by a plurality of accumulators, stop valve is formed.

4. a kind of high speed folding mould hydraulic circuit system as claimed in claim 1 is characterized in that safety valve (5) is made up of the safe inserted valve of band feedback, also can be made up of common inserted valve or security solenoid valve.

5. a kind of high speed folding mould hydraulic circuit system as claimed in claim 1; The pressure actuator port that it is characterized in that folding mould valve (2) links to each other with dynamical system (1); First actuator port of folding mould valve (2) also can link to each other with the rod chamber of folding mould oil cylinder (4), and second actuator port links to each other with the rodless cavity of folding mould oil cylinder (4).