CN201544429U - Double-plate type inner circulation vertical compression clamping mechanism - Google Patents

Abstract

A double-plate type inner circulation vertical compression clamping mechanism comprises a fixed template, a movable template, a clamping cylinder and a mold-moving oil cylinder, wherein, the clamping cylinder adopts an internal circulation oil cylinder with a single piston rod overhanging structure; the overhanging end of the piston rod is connected with the movable template or the fixed template; a valve housing is arranged at one end connected with the piston inside the oil cylinder; a valve core matched with the valve housing in a sliding manner is mounted in the valve housing; after the piston rod is connected with the piston equipped with a valve seat, a logic valve comprising the valve housing, the valve core and the valve seat is formed; and through the horizontal movement of the valve core, oil circulation inside an rod oil chamber and an rodless oil chamber can be blocked and dredged, and the oil chamber with the rod and the oil chamber without the rod are separated by the piston. The utility model overcomes the shortcomings of great quantity of oil entering and returning back during the opening and the closing of the mold and great resistance, a division board is mounted inside an oilless chamber for dividing into a cavity communicated with air, so that negative pressure which enables air to be absorbed in is avoided from being produced when a mold opening action is performed. The utility model has the advantages of simple and reliable structure, low cost, large oil bypass aperture of the logic valve, small resistance and high speed, and therefore meets the requirements of fast mould clamping of an injection machine at high accuracy and fast speed.

Description

Double-plate type internal recycling vertical pressing clamping mechanism

Technical field

The utility model relates to a kind of double-plate type internal recycling vertical pressing clamping mechanism, relates in particular to a kind of clamping mechanism that is used for injection machine, die casting machine, hydraulic press, section bar extruder.

Background technology

Existing hydraulic injection molding machine; the clamping of hydraulic press has adopted double-plate; it is short that it has fuselage; the closing precision height; fireballing advantage; existing two-plate type mould clamping mechanism; circulation Mode-locking oil cylinder adopts the overhanging structure of double piston-rod mostly in it; exist the long and second overhanging piston rod of fuselage at dispensing end dangerous and again shape ring artificial material loading; shortcomings such as maintenance operation; if but do not have the second overhanging work bar of trembling with fear; when matched moulds, will have a large amount of hydraulic oil and get back to fuel tank; during die sinking; need again from the fuel tank oil suction; not only increase the weight of the resistance of folding mould, also can make die sinking produce negative pressure, suck air.The repairing, the oil extraction problem that solve above-mentioned existence are the keys that interior circulating oil cylinder is optimized structure, reduced cost.

Summary of the invention

In order to overcome the above-mentioned shortcoming that the overhanging structure of existing interior circulation Mode-locking oil cylinder double piston-rod exists; the utility model provides a kind of overhanging double-plate type internal recycling vertical pressing clamping mechanism of single-piston rod that adopts; circulation Mode-locking oil cylinder is the overhanging structure of single-piston rod in it; the overhanging end of piston rod is connected (moving platen or solid plate) with template; the piston rod other end is connected with piston in oil cylinder and constitutes logical valve; can be controlled in the oil cylinder by separated circulation or the blocking-up that fluid in bar oil pocket and the no bar oil pocket is arranged of piston; the division board of setting up a slip in no bar oil pocket is separated out a cavity that connects atmosphere, can overcome the existing shortcoming of double piston-rod Mode-locking oil cylinder overhanging and the overhanging existing structure of single-piston rod.

The technical scheme in the invention for solving the technical problem is: the piston rod external part of Mode-locking oil cylinder is connected with moving platen (or solid plate), the end that piston rod is connected with piston in cylinder body has valve pocket, built-in slidably spool, have pressure chamber in the piston and the valve seat that has centre bore is housed, piston rod is with after piston is connected, constituted one by valve pocket, spool, the logical valve that valve seat constitutes, valve pocket places in the pressure chamber of piston, pressure chamber communicates with the centre bore of valve seat, pressure chamber has passage and communicates with the bar oil pocket is arranged, when the spool right side, when moving left, can block or open by piston is separated has the fluid of bar oil pocket and no bar oil pocket mobile.The division board of setting up a slip in no bar oil pocket is separated out a cavity that is communicated with atmosphere, with avoided bar oil pocket and no bar oil pocket because of the sectional area difference causes no bar oil pocket oil starvation space.

The beneficial effects of the utility model be compact conformation, simple and reliable, cost is low, logical valve oil through footpath big, the oil circuit resistance is little, leak less, speed is fast, can satisfy high accuracy, the requirement of the high-speed quick locked mode of injection machine.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the utility model Mode-locking oil cylinder structural section figure

Among the figure: 1 solid plate, 2 moving platens, 3 Mode-locking oil cylinders, 4 mould shifting oil cylinders, 5 piston rods, 6 pistons, 7 cylinder bodies, 8 division boards, 9 cylinder covers, 10 spools, 11 valve pockets, 12 valve seats, 13 springs, 14 spring seat boards, 15 pressure chambers, 16 control grease chambeies, 17 high-pressure oil passages, 18 oil inlet and oil return passages, 19 passages, 20 passages, 21 have bar oil pocket, 22 no bar oil pockets, 23 cavitys, 24 valve base center holes.

The specific embodiment

As Fig. 1, shown in Figure 2, the utility model is by solid plate 1, moving platen 2, Mode-locking oil cylinder 3, mould shifting oil cylinder 4 is formed, Mode-locking oil cylinder 3 is by cylinder body 7, piston rod 5, piston 6 reaches by spool 10, valve pocket 11, the logical valve that valve seat 12 constitutes is formed, cylinder body 7 is fixed on the solid plate 1, piston rod 5 external parts and moving platen 2 are fastenedly connected, the end that piston rod 5 is connected with piston 6 in cylinder body 7 has the valve pocket 11 of round inner chamber, place one at valve pocket 11 inner chambers and can cooperate the spool 10 that slides with valve pocket 11 inner chambers, spool 10 1 end faces and valve pocket 11 inner chambers form a control grease chamber 16, spool 10 other ends are conical surface S, can be in contact with one another with the conical surface V of valve seat 12 to cooperate; Have pressure chamber 15 in the stage casing 6.2 of piston 6, the valve seat 12 that has centre bore 24 is housed in the back segment 6.3 of piston 6, the leading portion 6.1 of piston 6 can be threaded with piston rod 5; Piston rod 5 is with after piston 6 is connected, valve pocket 11 places in the pressure chamber 15, pressure chamber 15 communicates with the centre bore 24 of valve seat 12, constitute a logical valve that constitutes by spool 10, valve pocket 11, valve seat 12, piston 6 has been separated into bar oil pocket 21 and no bar oil pocket 22 with cylinder body 7, pressure chamber 15 has passage 19 and communicates with bar oil pocket 21 is arranged, control grease chamber 16 has passage 20 and communicates with pressure chamber 15, spool 10 moves to left and slides when resetting, 20 in passage is covered retaining by spool 10, and piston rod 5 centers have passage 17 and connect control grease chamber 16 and oil outer network systems; In the conical surface S end of spool 10 spring 13 is housed, can helps spool 10 to move to left and reset, spring seat board 14 is fixed on piston 6 back segments 6.3 ends; Hydraulic oil enters control grease chamber 16 from passage 17, promoting spool 10 moves to right, its conical surface S contacts with valve seat 12 conical surface V and coincide, close the passage of valve seat 12 centre bores 24, the fluid of having blocked passage that rod oil cylinder 21 footpath pressure chambers 15 are arranged and no bar oil pocket 22 circulates, hydraulic oil has entered in bar oil pocket 21 and the pressure chamber 15 by passage 20 or passage 18, provide and fasten the required clamp force of mould and carry out locked mode, locked mode finishes, passage 17 and passage 18 take back fuel tank, hydraulic oil disappears, the spool 10 reseting logic valve that moves to left under the elastic force of spring 13 helps is opened, centre bore 24 passages of valve seat 12 communicate with pressure chamber 15, have the fluid in bar oil pocket 21 and the no bar oil pocket 22 to circulate.In no bar oil pocket 22, set up the division board 8 of a slip, division board 8 will not have bar oil pocket 22 and will be separated out a cavity 23 of connecting atmosphere, the slippage of division board 8 can change the volume of no bar oil pocket 22, produces no bar oil pocket 22 oil starvation spaces because bar oil pocket 21 and no bar oil pocket 22 sectional area difference are arranged when having avoided the die sinking action.

Narrate the course of work of the present utility model below in conjunction with accompanying drawing 1: two mould shifting oil cylinder 4 symmetries are installed on the solid plate 1, its piston rod is connected with moving platen 2, four Mode-locking oil cylinders 3 are installed on four angles of solid plate 1, and the external part of its piston rod 5 passes solid plate 1 back and is connected with moving platen 2.Mould shifting oil cylinder 4 drives moving platen 2 and does the matched moulds action to the right, the piston rod 5 and the piston 6 of Mode-locking oil cylinder 3 move right, hydraulic oil in the no bar oil pocket 22 by compression after, spool 10 can be promoted move to left and enter pressure chamber 15 and have in the bar oil pocket 21 through centre bore 24 passages, also division board 8 can be promoted to move to right simultaneously, till bar oil pocket 21 being arranged and not having the oil liquid pressure and atmospheric pressure balance of bar oil pocket 22, after getting togather mould, the hydraulic oil of oil piping system enters control grease chamber 16 from passage 17, promoting spool 10 moves right, the passage of blocking-up valve seat 12 centre bores 24, hydraulic oil continues to have entered in bar oil pocket 21 and the pressure chamber 15 by passage 20 or passage 18, provide and fasten the required clamp force of mould and carry out locked mode, through injection, pressurize, preformed, after cooling waits action, locked mode finishes, stop into hydraulic oil, passage 17,18 take back fuel tank, spool 10 is under the elastic force of spring 13 helps, spool 10 moves to left and resets, open centre bore 24 passages of valve seat 12, communicate with pressing chamber 15, there is the part hydraulic oil of bar oil pocket 21 to flow in the no bar oil pocket 22, realize that fluid circulates mutually, then, mould shifting oil cylinder 4 drive moving platens 1 are moved to the left does the die sinking action, and the piston rod 5 of Mode-locking oil cylinder 3 and piston 6 are to moving to left, there is the hydraulic oil in the bar oil pocket 21 to flow in the no bar oil pocket 22 less, make no bar oil pocket 22 form negative pressure, the slippage left under atmospheric promotion of division board 8 this moment has been filled up the formed space of oil pocket 22 oil starvations, no chamber and has been eliminated negative pressure, at last, open mould and eject goods.

Fig. 1 is a Figure of abstract of the present utility model.

Claims (2)

1. double-plate type internal recycling vertical pressing clamping mechanism; by solid plate; moving platen; Mode-locking oil cylinder and mould shifting oil cylinder are formed; Mode-locking oil cylinder (3) is by cylinder body (7); piston rod (5); piston (6) and logical valve are formed; it is characterized in that: piston rod (5) external part is connected with moving platen (2); the end that piston rod (5) is connected with piston (6) in cylinder body (7) has the valve pocket (11) of round inner chamber; valve pocket (11) inner chamber is placed one can cooperate the spool (10) that slides with valve pocket (11) inner chamber; spool (10) one end faces and valve pocket (11) inner chamber form a control grease chamber (16); have pressure chamber (15) in the stage casing (6.2) of piston (6); the valve seat (12) that has centre bore (24) is housed in the back segment (6.3) of piston (6); after the end that the leading portion (6.1) of piston (6) and piston rod (5) have a valve pocket (11) is connected; promptly constitute one by spool (10); valve pocket (11); the logical valve that valve seat (12) constitutes; valve pocket (11) places in the pressure chamber (15) of piston (6); pressure chamber (15) communicates with the centre bore (24) of valve seat (12); pressure chamber (15) has passage (19) and communicates with bar oil pocket (21) is arranged; when spool (10) right side; when moving left, capable of blocking or open the fluid that bar oil pocket (21) and no bar oil pocket (22) are arranged that is separated by piston (6) and circulate.

2. double-plate type internal recycling vertical pressing clamping mechanism according to claim 1; it is characterized in that being equipped with in the no bar oil pocket (22) in the described Mode-locking oil cylinder (3) one can slippage in the chamber division board (8), division board (8) will not have bar oil pocket (22) and will be separated out a cavity (23) that is communicated with atmosphere.