TWM464313U - Mold clamping apparatus for injection molding machine - Google Patents

Description

Injection molding machine clamping device

The present invention relates to a clamping device for an injection molding machine, and more particularly to a composite clamping device which is driven by a cylinder to perform high-pressure clamping, and is driven by a pneumatic cylinder to generate a mold opening state.

According to the injection molding machine, the clamping device is mainly used to provide one of the key components of the molding die during the opening and closing action. In order to cooperate with the molding material in the process of injecting the cavity with high pressure, the occurrence of flashing or product burrs is avoided. In addition to the precise mold clamping of the mold, it is necessary to apply sufficient clamping force to the mold.

The conventional direct-pressure clamping device, such as the patent publication number: TW 290916, "Clamping device for injection molding machine", discloses that: a front fixing seat and a rear fixing seat are oppositely disposed on one side of the front fixing seat And a plurality of preset length guide rods are fixedly connected with the front fixing seat, a movable mold base is disposed on the guide rod between the front and rear fixed seats, and a push cylinder device is disposed on the rear fixed seat, one end of which is fixed on the rear fixed seat The movable mold base is adjacent to one side of the rear fixed seat, and the push cylinder device can drive the linear movement of the movable mold base; wherein the push cylinder device mainly comprises: a main push cylinder group having an inner hollow cylinder wall, Provided on a side of the rear fixed seat facing the movable mold base, a main piston is embedded in the cylinder wall, the main piston is provided with a hollow shaft hole, and the main piston is adjacent to one side of the movable mold base. Exposed outside the cylinder wall a plurality of thrusters are fixed on the convex portion side in the radial direction of the main piston, and a block is disposed in a direction of each thruster near the center of the main piston shaft hole; a pair of push cylinder groups has a shaft, One end of the shaft is disposed on the rear fixed seat, and the other end is provided with a pair of pistons, which can axially penetrate the rear fixed seat and protrude into the shaft hole of the main piston of the main push cylinder group.

The above-mentioned pushing device mainly drives the moving member of the movable mold base to be a shaft of the main piston and the auxiliary pushing cylinder, and the main piston is coupled to the central position of the movable mold base, thereby pushing the movable mold base displacement At the time, the stress is concentrated in the middle, and there is a disadvantage that the movable mold base is unevenly stressed.

In addition, the shaft of the auxiliary push cylinder is disposed inside the main piston in a small diameter manner, so that the stroke is long, the occupied space is long, and the design of the linkage mechanism is quite complicated, and the component processing is not easy, and the manufacturing is difficult. High cost is missing.

The main purpose of the present invention is to provide a master cylinder shaft connected to the center of the movable mold base during the assembly and opening of the mold, and to synchronously drive a group of side cylinder shafts symmetrically coupled on both sides of the movable mold base. A clamping device for an injection molding machine that pushes the movable mold base to obtain an average force benefit when displaced.

Another object of the present invention is to provide a clamping device for an injection molding machine which has the advantages of facilitating the structure and effectively reducing the manufacturing cost.

In order to achieve the above object, the present invention provides a clamping device for an injection molding machine, comprising: a base having equal length and parallel guiding rods at four ends; and a fixing seat fixed to the four guiding rods away from the base An end of the seat; a movable mold base, the sliding sleeve is disposed between the base and the fixed seat; the main hydraulic cylinder device includes a main cylinder body locked to the base, the main The cylinder body is provided with an open upper main cylinder chamber, one side of which is provided with an oil guiding hole and a side oil hole for feeding in and out of the oil passage, and a main cylinder shaft is sleeved on the main cylinder chamber of the main cylinder body, and one end of the main cylinder shaft Locked in a central position on one side of the movable mold base; a symmetric side hydraulic cylinder device is respectively disposed on the two sides of the main cylinder block, and the side hydraulic cylinder device comprises: one side cylinder body is locked The side cylinder body is respectively provided with an oil hole and a lower oil hole at the upper and lower ends, and the side cylinder body is provided with a linearly movable side cylinder shaft at the upper end, and the upper end of the side cylinder shaft is locked to the movable mold The main hydraulic cylinder can be driven by injecting low pressure and high speed hydraulic oil pressure into the main cylinder chamber and the side cylinder body for the first time. The side cylinder shaft of the main cylinder shaft and the symmetrical side oil pressure device synchronously pushes the movable mold base to the fixed seat end to quickly move to the mold clamping state, and then injects the high pressure and low speed hydraulic oil pressure for the second time to generate the function of high pressure clamping. The force, in turn, enables the movable mold base to obtain the average force acting during displacement, and has the advantages of high-speed mold clamping action and high-pressure clamping force; when the mold is opened, only the side cylinder shaft of the symmetric side hydraulic cylinder device is driven. To the displacement, it can synchronously pull the main cylinder shaft down, and reach To reduce the efficiency of fuel consumption.

The main hydraulic cylinder device of the preferred embodiment of the present invention has more than one leakage ring between the main cylinder body and the main cylinder shaft, and one or more guide rings with wear resistance function to effectively prevent The fluid overflows and directs the master cylinder shaft in the same axial direction as the master cylinder chamber. Wherein, the leakage ring is a rubber ring, and the guiding ring is a Teflon ring.

The main hydraulic cylinder device of the preferred embodiment of the present invention, wherein the inner diameter of the main cylinder chamber is larger than the outer diameter of the main cylinder shaft to form an annular chamber for injecting hydraulic oil fluid.

The main hydraulic cylinder device of the preferred embodiment of the present invention, wherein the bottom of the main cylinder shaft is in a closed state, and an opening is provided in the axial direction, and the hollow tube body is designed inside to reduce the weight thereof.

In the following, the drawings of the preferred embodiments of the present invention are further described in the following, so that those skilled in the art of the present invention can be implemented according to the statements of the present specification.

First, please refer to the first to fifth figures. The present invention relates to a clamping device for an injection molding machine, which comprises: a base 10, a fixing base 20, a movable mold base 30, and a main hydraulic cylinder device 40. And a symmetrical side hydraulic cylinder device 50; wherein a base 10 is locked on an injection molding machine (not shown), which is generally a rectangular body, and the base 10 is at the four end corners. Position lock A guide rod 11 of equal length and parallel is fixed, and a stepped hole 12 (shown in the fourth figure) which is wide and narrow and extends through the center of the base 10 is provided for the main hydraulic cylinder device 40. The pedestal is provided with a symmetrical notch 13 on both sides of the stepped hole 12 for symmetrical side hydraulic cylinder device 50; the fixing base 20 is fixed on the four guiding rods 11 away from the base 10 At the end, a central hole 21 is formed at a central position thereof, and a plurality of upper screw holes 22 are arranged in a vertical and horizontal staggered manner to provide an upper mold locking and fixing; the movable mold base 30 is sleeved on the four guiding rods 11 The movable mold base 30 is provided with a plurality of bottom screw holes 31 arranged in a ring shape at the center of the bottom portion, and symmetric side turn holes 32 are provided at both sides, and the movable mold base 30 is provided at the upper end. a plurality of lower screw holes 33 arranged in a crisscrossing manner to provide a lower mold lock setting position; the main hydraulic cylinder device 40 includes: a main cylinder block 41 is a stepped hole 12 of the base 10 from bottom to top, And the main cylinder block 41 is fixed to the base 10 by a plurality of locking elements 42. The main cylinder block 41 is provided with an open upper main cylinder chamber 411, and one side thereof is divided. An oil guiding hole 412 and a side oil hole 413 for the inlet and outlet oil passages are mutually penetrated from the outer cylinder chamber 411; a master cylinder shaft 43 is sleeved on the main cylinder chamber 411 of the main cylinder block 41, and one end of the master cylinder shaft 43 Cooperating with the plurality of locking elements 42 to lock the bottom screw holes 31 at the bottom of the movable mold base 30; the symmetric side hydraulic cylinder devices 50 are respectively disposed at the base 10 The two sides of the main hydraulic cylinder device 40 are located at the notch 13 of the base 10. The side hydraulic cylinder device 50 includes: the upper end of the one-side cylinder 51 is coupled to the base by a plurality of locking elements 42 a side notch 13 of the side, the side cylinder 51 is respectively provided with an oil hole 511 and a lower oil hole 512 at the upper and lower ends, and is connected to the oil passage system (not shown) for introducing or discharging hydraulic oil. The side cylinder block 51 is provided with a linearly movable side cylinder shaft 52 at the upper end. The upper end of the side cylinder shaft 52 is provided with a threaded section 521 for directly locking and fastening the side screw hole 32 of the movable mold base 30; It can be shown that when the mold is to be clamped, the hydraulic pressure of the low pressure and high speed can be injected into the main cylinder chamber 411 of the main hydraulic cylinder device 40 and the side cylinder 51 of the symmetric hydraulic cylinder device 50. The main cylinder shaft 43 of the main hydraulic cylinder device 40 and the side cylinder shaft 52 of the symmetrical side hydraulic device 50 synchronously push the movable mold base 30 to the fixed mold 20 end to rapidly close to the mold clamping state, and then the opposite cylinder block 51 can be The inside is again injected with high-pressure low-speed hydraulic oil pressure to generate sufficient high-pressure clamping force to lock the fixed seat 20 and the movable mold base respectively. The upper inner mold 61 and the lower mold 62 can fully and strongly lock the mold; the driving of the movable mold base 30 can obtain the function of the average force, and the utility of the high-speed mold clamping action and the high-pressure clamping force; When the mold is opened, only the side cylinder shaft 52 of the symmetric side hydraulic cylinder device 50 is driven to be reversely displaced, so that the main cylinder shaft 52 can be synchronously lowered to achieve the effect of reducing fuel consumption.

As shown in the fifth figure, the main hydraulic cylinder device of the preferred embodiment of the present invention 40, between the main cylinder block 41 and the master cylinder shaft 43 is provided with more than one gap-preventing ring 44, and one or more spaced-apart guide ring 45 with wear resistance function to effectively prevent fluid The overflow and the positive master cylinder shaft 41 are in the same axial direction as the master cylinder chamber 411. The leakage ring 44 is a rubber ring, and the guiding ring 45 is a Teflon ring.

As shown in the fourth figure, the main hydraulic cylinder device 40 of the preferred embodiment of the present invention, wherein the inner diameter of the main cylinder chamber 411 is larger than the outer diameter of the main cylinder shaft 41 to form an annular chamber for injecting hydraulic oil. fluid.

As shown in the fourth figure, the main hydraulic cylinder device 40 of the preferred embodiment of the present invention, wherein the main cylinder shaft 41 is a hollow tube body having an opening upward and a bottom closed state to reduce the weight thereof. By.

In summary, it is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the equivalent changes and modifications made by the scope of the patent application of this creation are the scope of the patent creation. Covered.

10‧‧‧ Pedestal

11‧‧‧Guide bars

12‧‧‧ stepped holes

13‧‧‧ gap

20‧‧‧ Fixed seat

21‧‧‧ center hole

22‧‧‧Upper hole

30‧‧‧ activity module

31‧‧‧ bottom screw hole

32‧‧‧ side screw hole

33‧‧‧Under the screw hole

40‧‧‧Main hydraulic cylinder device

41‧‧‧Master cylinder

411‧‧‧Master cylinder room

412‧‧‧ oil guide hole

413‧‧‧ side oil hole

42‧‧‧Locking components

43‧‧‧Master cylinder shaft

44‧‧‧ leaking ring

45‧‧‧ Guide ring

50‧‧‧Side hydraulic cylinder device

51‧‧‧ side cylinder

511‧‧‧ Oil hole

512‧‧‧ oil hole

52‧‧‧ side cylinder shaft

521‧‧ Thread segment

61‧‧‧Upper mold

62‧‧‧ Lower mold

First Figure: A top exploded view of a preferred embodiment of the present authoring structure.

Second Figure: A bottom view exploded view of a preferred embodiment of the present authoring structure.

Third Figure: A combination of preferred embodiments of the present authoring structure.

Figure 4: A-A cross-sectional view of the third figure.

Figure 5: A cross-sectional view of B-B in the third diagram.

Figure 6 is a schematic diagram of the operation of the preferred embodiment of the present authoring structure.

10‧‧‧ Pedestal

11‧‧‧Guide bars

13‧‧‧ gap

20‧‧‧ Fixed seat

21‧‧‧ center hole

30‧‧‧ activity module

33‧‧‧Under the screw hole

40‧‧‧Main hydraulic cylinder device

41‧‧‧Master cylinder

412‧‧‧ oil guide hole

413‧‧‧ side oil hole

42‧‧‧Locking components

43‧‧‧Master cylinder shaft

50‧‧‧Side hydraulic cylinder device

51‧‧‧ side cylinder

511‧‧‧ Oil hole

512‧‧‧ oil hole

52‧‧‧ side cylinder shaft

521‧‧ Thread segment

Claims (4)

A clamping device for an injection molding machine, comprising: a guiding rod and a fixing base are connected with four guiding rods; a movable mold seat is sleeved on the four guiding rods; wherein the base is provided with a main oil at a central position The cylinder device is provided with a symmetrical side hydraulic cylinder device on both sides of the base; the main hydraulic cylinder device includes: a main cylinder body is locked on the base, and the upper end sleeve of the main cylinder body is provided with a linear motion main body a cylinder shaft, the upper end of the main cylinder shaft is locked at the bottom of the movable mold base; the side hydraulic cylinder device comprises: one end of the cylinder block is fixed to the base, and the upper end of the side cylinder body is sleeved with a linearly movable side cylinder shaft The upper end of the side cylinder shaft is locked to the movable mold base; when the mold is closed, the hydraulic oil pressure of the low pressure and high speed can be injected into the main hydraulic cylinder device and the symmetric side hydraulic cylinder device, and after the mold is closed, the mold is given again. The hydraulic oil pressure of the high-pressure mold clamping can achieve the function of driving the movable mold base for rapid mold clamping; when the mold is opened, the reverse displacement of the cylinder shafts on both sides can be driven, and the main cylinder shaft can be synchronously lowered to achieve the low-pressure high-speed pulling activity. Model holder. The clamping device of the injection molding machine according to claim 1, wherein the main hydraulic cylinder device has more than one leakage ring between the main cylinder and the main cylinder shaft, and one or more wear-resistant functions. Guide ring. The clamping device of the injection molding machine according to claim 1, wherein the main cylinder body is provided with an open upper main cylinder chamber, and one side thereof is provided with an oil guiding hole and a side oil hole for feeding in and out of the oil passage, respectively. External and main cylinder chambers The main cylinder shaft sleeve is sleeved on the main cylinder chamber of the main cylinder block, and the inner cylinder chamber has an inner diameter larger than the outer diameter of the main cylinder shaft to form an annular chamber. The clamping device of the injection molding machine according to claim 1, wherein the main cylinder shaft of the main hydraulic cylinder device is provided with an opening upward in the axial direction and a hollow tubular body in a closed state at the bottom.