Injection mold adopting four-oil-cylinder ejection structure

Abstract

The utility model discloses an injection mold adopting a four-oil-cylinder ejection structure. Comprising a mold mounting bottom plate, four guide columns, a movable mold, an ejector rod hole and an ejector rod, wherein the four guide columns are upwards and vertically arranged at four corners of the mold mounting bottom plate; the movable mold is fixed at the tops of the guide columns; the ejector rod hole is formed in the movable mold; the push plate is arranged between the mold mounting bottom plate and the movable mold and connected with the lower end of the ejector rod, guide column holes in sliding fit with the guide columns are formed in the push plate, and the push plate is movably arranged on the four guide columns in the vertical direction through the guide column holes; the front side face and the rear side face of the movable mold are each provided with a pair of ejection oil cylinders at intervals, and piston rods of the four ejection oil cylinders are arranged downwards and connected with the push plate. According to the utility model, the stability and reliability of the ejection action of the injection mold are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely relates to an injection mold with four oil cylinder ejection structure. BACKGROUND

[0002] The ejection structure of the injection mold is the key structure for realizing the ejection and demolding of the injection molded part. The typical ejection structure of the injection mold usually sets a pair of ejection oil cylinders between the movable die and the push plate, and the pair of ejection oil cylinders are separately arranged on the front and back sides of the movable die. After the mold is opened after the injection is completed, the ejection and demolding of the injection molded part are realized through the ejection oil cylinders separately arranged on the two sides of the movable die.

[0003] However, for large injection molded parts, according to the shape needs of the injection molded part, multiple large-size inclined ejectors are usually arranged on the movable die when the injection mold is designed. Due to the particularity of the shape of the injection molded part and the existence of multiple inclined ejectors, as well as the manufacturing and installation errors of the injection mold, the ejection force of the ejection oil cylinder is large, and the stress on both sides of the ejection oil cylinder is unbalanced and uneven, thereby the ejection oil cylinder is easily stuck and cannot smoothly complete the ejection action, which reduces the reliability of the ejection action of the injection mold under the condition of mass production. SUMMARY

[0004] In order to solve the above problems, the utility model provides an injection mold with four oil cylinder ejection structure, which aims to improve the stability and reliability of the ejection action of the injection mold. The specific technical scheme is as follows:

[0005] An injection mold with four oil cylinder ejection structure, comprising a mold installation bottom plate, four guide columns arranged vertically upward at the four corner parts of the mold installation bottom plate, a movable die fixed at the top of the guide column, a top rod hole arranged on the movable die, a top rod movably arranged on the top rod hole of the movable die, a push plate arranged between the mold installation bottom plate and the movable die and connected with the lower end of the top rod, a guide column hole is arranged on the push plate and slidably matched with the guide column, the push plate is movably arranged on the four guide columns through the guide column hole in the up-down direction, a pair of ejection oil cylinders is respectively and separately arranged on the front and back sides of the movable die, and the piston rods of the four ejection oil cylinders are arranged downward and respectively connected with the push plate.

[0006] Preferably, the piston rods of the four ejection oil cylinders are respectively arranged at positions opposite to each other in the front-rear direction of the four guide columns.

[0007] In the utility model, the lower end of the piston rod of the ejection oil cylinder is provided with a connecting flange, and the connecting flange is fixed on the push plate through bolts.

[0008] In order to further improve the stability and reliability of the push plate up and down movement, a plurality of guide rods are vertically arranged on the push plate, guide holes are arranged on the movable mold, and the guide rods are slidably arranged on the guide holes of the movable mold.

[0009] As a further improvement, the injection mold with four ejection oil cylinders of the utility model further comprises an oil cylinder position fine adjustment structure for fine adjustment of the position of the ejection oil cylinder during installation of the ejection oil cylinder to achieve uniform and consistent pressing force of the four ejection oil cylinders, the oil cylinder position fine adjustment structure comprises guide grooves arranged on the front and rear end surfaces of the movable mold in the left-right direction, an oil cylinder mounting plate movably arranged in the guide grooves in the left-right direction and fixed on the guide grooves by bolts, and a pair of ejection oil cylinders fixed on the oil cylinder mounting plate; the position of the oil cylinder mounting plate in the left-right direction is fine adjusted during installation of the ejection oil cylinder to fine adjust the position of the pair of ejection oil cylinders in the left-right direction.

[0010] In the utility model, the oil cylinder position fine adjustment structure further comprises a connecting cylinder for connecting the piston rod of the ejection oil cylinder and the push plate together, limit flanges are arranged at the upper and lower ends of the connecting cylinder respectively, a U-shaped opening is arranged on the side edge of the push plate, the connecting cylinder is movably arranged in the U-shaped opening of the push plate, the connecting flange at the lower end of the piston rod of the ejection oil cylinder is fixedly connected with the limit flange at the upper end of the connecting cylinder by bolts, the limit flange at the upper end of the connecting cylinder is movably connected with the upper end surface of the push plate, and the limit flange at the lower end of the connecting cylinder is movably connected with the lower end surface of the push plate.

[0011] In the utility model, a gap suitable for adjustment of the position of the ejection oil cylinder is arranged between the groove body of the U-shaped opening of the connecting cylinder and the side surfaces of the push plate.

[0012] Preferably, a blocking strip for blocking the connecting cylinder in the U-shaped opening is fixed on the U-shaped opening of the push plate by bolts.

[0013] In the utility model, the oil cylinder position fine adjustment structure further comprises a waist-shaped hole arranged on the oil cylinder mounting plate and parallel to the left-right direction, and the left-right position adjustment and fixation of the oil cylinder mounting plate are realized by bolts penetrating into the waist-shaped hole and threadedly connected with the bottom of the guide groove of the movable mold.

[0014] In the utility model, the oil cylinder position fine adjustment structure further comprises an adjusting seat arranged at the left and right sides of the guide groove of the movable mold, and an adjusting screw arranged on the adjusting seat and used for adjusting the left-right position of the oil cylinder mounting plate during installation, and the adjusting screw is pressed on the left and right side end surfaces of the oil cylinder mounting plate.

[0015] Preferably, a heat insulation pad is arranged between the oil cylinder mounting plate and the bottom surface of the guide groove of the movable mold, and the heat insulation pad is sleeved on the outer circle of the bolt for fixing the oil cylinder mounting plate.

[0016] In order to facilitate the position adjustment of the ejection oil cylinder when the injection mold is tested, the injection mold with the four-oil-cylinder ejection structure is further provided with a clamping force testing device for testing the clamping force of the four ejection oil cylinders when the injection mold is tested.

[0017] Preferably, the tensile and compressive force sensor is a flange type tensile and compressive force sensor.

[0018] The four tensile and compressive force sensors are respectively connected to the control circuit module with the tensile and compressive force display device through signal lines.

[0019] After the test, the four tensile and compressive force sensors temporarily installed can be removed.

[0020] The injection mold with the four-oil-cylinder ejection structure has the following beneficial effects:

[0021] First, the injection mold with the four-oil-cylinder ejection structure is provided with a pair of ejection oil cylinders arranged at intervals on the front and rear sides of the movable mold, which can increase the ejection force and make the ejection action more stable and reliable, and can effectively prevent the common oil cylinder ejection structure from being easily stuck.

[0022] Second, the four ejection oil cylinders of the injection mold with the four-oil-cylinder ejection structure are arranged as close to the four guide columns as possible, which can further improve the stability and reliability of the ejection action.

[0023] Third, the utility model discloses a kind of injection mould of four oil cylinder ejection structure, the front and rear sides of movable mould are provided with oil cylinder position fine adjustment structure, it is combined with the tightness testing device of matched use when testing mould, can be more accurate fine adjustment the position of ejecting oil cylinder, realize the uniformity of a pair of tightness of ejecting oil cylinder, to further improve the stability and reliability of injection mould ejection action.

[0024] Fourth, the utility model discloses a kind of injection mould of four oil cylinder ejection structure, ejecting oil cylinder is fixed on mould installation bottom plate by heat insulation pad, it can reduce the adverse effect of mould heat transfer to ejecting oil cylinder, to reduce the working temperature of ejecting oil cylinder, to further improve the working reliability and service life of ejecting oil cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a kind of injection mould of four oil cylinder ejection structure of the utility model and its schematic diagram;

[0026] Figure 2 It is Figure 1 Right view of;

[0027] Figure 3 It is Figure 1 Structure schematic diagram (increased oil cylinder position fine adjustment structure) further improved on the basis of;

[0028] Figure 4 It is structure schematic diagram (sets up tension and pressure sensor between the connecting flange of ejecting oil cylinder piston rod and the upper end limit flange of connecting cylinder) when testing mould of injection mould.

[0029] In the drawing: 1, mould installation bottom plate, 2, guide pillar, 3, movable mould, 4, ejector rod, 5, push plate, 6, ejecting oil cylinder, 7, piston rod, 8, connecting flange, 9, bolt, 10, guide rod, 11, oil cylinder position fine adjustment structure, 12, guide slot, 13, oil cylinder mounting plate, 14, connecting cylinder, 15, limit flange, 16, U-shaped opening, 17, baffle, 18, waist-shaped hole, 19, adjusting seat, 20, adjusting screw, 21, heat insulation pad, 22, tension and pressure sensor. DETAILED DESCRIPTION

[0030] The specific implementation of the utility model is further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0031] As Figures 1 to 4The utility model discloses an embodiment of a injection mold of four oil cylinder ejection structure, including mold installation bottom plate 1, the four guide columns 2 of setting in the four corner parts of the mould installation bottom plate 1 is set up upwards, the movable mould 3 of fixing in the top of guide column 2, set on the ejector rod hole of movable mould 3, the ejector rod 4 of moving setting on the ejector rod hole of movable mould 3, set between the mould installation bottom plate 1 with movable mould 3 and with the lower end of ejector rod 4 is connected the push plate 5, the push plate 5 is set with the guide column hole of the sliding cooperation of guide column 2, the push plate 5 is moved and set on the four guide columns 2 through the guide column hole in the up-down direction, a pair of ejection oil cylinder 6 is separately arranged on the front and back sides of movable mould 3, and the piston rod of four ejection oil cylinder 6 is set downwards and is connected with push plate 5 respectively.

[0032] Preferably, the piston rod 7 of the four ejection oil cylinder 6 is respectively arranged in the position opposite to the front and back direction of the four guide columns 2.

[0033] In the embodiment, the lower end of the piston rod 7 of the ejection oil cylinder 6 is provided with a connecting flange 8, and the connecting flange 8 is fixed on the push plate 5 through the bolt 9.

[0034] In order to further improve the stability and reliability of the up-down movement of the push plate 5, a plurality of guide rods 10 are vertically arranged on the push plate 5, and guide holes are arranged on the movable die 3, and the guide rods 10 are slidably arranged on the guide holes of the movable die 3.

[0035] As a further improvement, the injection mold of the embodiment of the four oil cylinder ejection structure is further provided with an oil cylinder position fine adjustment structure 11 for fine adjustment of the position of the ejection oil cylinder 6 during installation of the ejection oil cylinder 6 to realize uniform ejection force of the four ejection oil cylinders 6, the oil cylinder position fine adjustment structure 11 includes a guide groove 12 opened on the front and back end faces of the movable die 3 in the left-right direction, an oil cylinder mounting plate 13 movably arranged in the guide groove 12 in the left-right direction and fixed in the guide groove 12 through the bolt 9, and a pair of ejection oil cylinders 6 are fixed on the oil cylinder mounting plate 13; the position of the oil cylinder mounting plate 1 in the left-right direction is fine adjusted during installation of the ejection oil cylinder 6 to realize fine adjustment of the position of the pair of ejection oil cylinders 6 in the left-right direction.

[0036] In the embodiment, the oil cylinder position fine adjustment structure 11 further comprises a connecting cylinder 14 for connecting the piston rod 7 of the ejecting oil cylinder 6 and the push plate 5 together, the upper and lower ends of the connecting cylinder 14 are respectively provided with a limiting flange 15, the side of the push plate 5 is provided with a U-shaped opening 16, the connecting cylinder 14 is movably arranged in the U-shaped opening 16 of the push plate 5, the connecting flange 8 at the lower end of the piston rod 7 of the ejecting oil cylinder 6 is fixedly connected with the limiting flange 15 at the upper end of the connecting cylinder 14 through a bolt 9, the limiting flange 15 at the upper end of the connecting cylinder 14 is in moving contact with the upper end surface of the push plate 5, and the limiting flange 15 at the lower end of the connecting cylinder 14 is in moving contact with the lower end surface of the push plate 5.

[0037] In the embodiment, a gap is arranged between the connecting cylinder 14 and the groove side surfaces of the U-shaped opening 16 of the push plate 5 to adapt to the position adjustment of the ejecting oil cylinder 6.

[0038] Preferably, a blocking strip 17 for blocking the connecting cylinder 14 in the U-shaped opening 16 is fixed at the U-shaped opening 16 of the push plate 5 through the bolt 9.

[0039] In the embodiment, the oil cylinder position fine adjustment structure 11 further comprises a waist-shaped hole 18 arranged on the oil cylinder mounting plate 13 and parallel to the left-right direction, and the left-right position adjustment and fixation of the oil cylinder mounting plate 13 are realized by the bolt 9 penetrating into the waist-shaped hole 18 and threadedly connecting with the bottom of the guide groove 12 of the movable die 3.

[0040] In the embodiment, the oil cylinder position fine adjustment structure 11 further comprises an adjusting seat 19 arranged at the left and right sides of the guide groove 12 of the movable die 3, and an adjusting screw 20 arranged on the adjusting seat 19 and used for adjusting the left-right position of the oil cylinder mounting plate 13 during installation, and the adjusting screw 20 is pressed on the left and right side end surfaces of the oil cylinder mounting plate 13.

[0041] Preferably, a heat insulation pad 21 is arranged between the oil cylinder mounting plate 13 and the bottom surface of the guide groove 12 of the movable die 3, and the heat insulation pad 21 is sleeved on the outer circle of the bolt 9 for fixing the oil cylinder mounting plate 13.

[0042] In order to facilitate the position adjustment of the ejection oil cylinder 6 when the injection mold is tested, the injection mold with four ejection oil cylinders in the embodiment is also provided with a clamping force testing device for testing the clamping force of the four ejection oil cylinders 6 when the injection mold is tested. The clamping force testing device comprises four pull pressure sensors 22 arranged between the connecting flange 8 at the lower end of the piston rod 7 of the four ejection oil cylinders 6 and the limiting flange 15 at the upper end of the connecting cylinder 14 when the mold is tested. The upper end of the pull pressure sensor 22 is fixedly connected with the connecting flange 8 at the lower end of the piston rod 7 of the ejection oil cylinder 6 through a bolt 9. The lower end of the pull pressure sensor 22 is fixedly connected with the limiting flange 15 at the upper end of the connecting cylinder 14 through a bolt 9. The four pull pressure sensors 22 are respectively connected with a control circuit module with a pull pressure display device through signal lines.

[0043] Preferably, the pull pressure sensor 22 is a flange type pull pressure sensor.

[0044] The four pull pressure sensors 22 are temporarily connected between the connecting flange 8 at the lower end of the piston rod 7 of the ejection oil cylinder 6 and the limiting flange 15 at the upper end of the connecting cylinder 14 when the injection mold is tested. The clamping force of the four ejection oil cylinders 6 can be monitored in real time and online. When the clamping force difference of a pair of ejection oil cylinders 6 on the same oil cylinder mounting plate 13 is large, the left and right positions of the ejection oil cylinder 6 can be adjusted through the oil cylinder position fine adjustment structure 11, so that the clamping force difference of the pair of ejection oil cylinders 6 is reduced or tends to be uniform.

[0045] After the mold is tested, the four pull pressure sensors 22 temporarily installed can be removed.

[0046] The above is only the preferred embodiment of the present application. It should be noted that for ordinary skilled persons in the technical field, without departing from the technical principles of the present application, some improvements and refinements can be made, which should also be considered as the protection range of the present application.

Claims

1. An injection mold employing a four-cylinder ejection structure, characterized in that, The mold mounting base, four guide columns arranged upright on the four corners of the mold mounting base, a movable mold fixed on the top of the guide columns, a top rod hole arranged on the movable mold, a top rod movably arranged on the top rod hole of the movable mold, a push plate arranged between the mold mounting base and the movable mold and connected with the lower end of the top rod, a guide column hole arranged on the push plate and slidably matched with the guide columns, the push plate movably arranged on the four guide columns through the guide column hole in the up-down direction, a pair of ejection oil cylinders arranged on the front and back sides of the movable mold, and the piston rods of the four ejection oil cylinders arranged downward and connected with the push plate.

2. The injection mold with four oil cylinder ejection structure according to claim 1, characterized in that, The piston rods of the four ejection oil cylinders are arranged at positions corresponding to the front and back directions of the four guide columns.

3. The injection mold with four oil cylinder ejection structure according to claim 1, characterized in that, The lower end of the piston rod of the ejection oil cylinder is provided with a connecting flange, and the connecting flange is fixed on the push plate by bolts.

4. The injection mold with four oil cylinder ejection structure according to claim 1, characterized in that, A plurality of guide rods are arranged upright on the push plate, and guide holes are arranged on the movable mold, and the guide rods are slidably arranged in the guide holes of the movable mold.

5. The injection mold with four oil cylinder ejection structure according to claim 1, characterized in that, An oil cylinder position fine adjustment structure is further arranged for fine adjustment of the position of the ejection oil cylinder during installation of the ejection oil cylinder to achieve uniform top pressing force of the four ejection oil cylinders, the oil cylinder position fine adjustment structure comprising guide grooves arranged on the front and back ends of the movable mold in the left-right direction, an oil cylinder mounting plate movably arranged in the guide grooves in the left-right direction and fixed on the guide grooves by bolts, and a pair of ejection oil cylinders fixed on the oil cylinder mounting plate; the position of the pair of ejection oil cylinders in the left-right direction is fine adjusted by fine adjustment of the position of the oil cylinder mounting plate in the left-right direction during installation of the ejection oil cylinder.

6. The injection mold with four oil cylinder ejection structure according to claim 5, characterized in that, The oil cylinder position fine adjustment structure further comprises a connecting cylinder for connecting the piston rod of the ejection oil cylinder with the push plate, the upper and lower ends of the connecting cylinder are respectively provided with limiting flanges, the side edge of the push plate is provided with a U-shaped opening, the connecting cylinder is movably arranged in the U-shaped opening of the push plate, the connecting flange at the lower end of the piston rod of the ejection oil cylinder is fixedly connected with the limiting flange at the upper end of the connecting cylinder by bolts, the limiting flange at the upper end of the connecting cylinder is movably contacted with the upper end surface of the push plate, and the limiting flange at the lower end of the connecting cylinder is movably contacted with the lower end surface of the push plate.

7. The injection mold with four oil cylinder ejection structure according to claim 5, characterized in that, The oil cylinder position fine adjustment structure further comprises a waist-shaped hole arranged on the oil cylinder mounting plate and parallel to the left-right direction, and the left-right position of the oil cylinder mounting plate is adjusted and fixed by the bolts penetrating into the waist-shaped hole and threadedly matched with the bottom of the guide groove of the movable mold.

8. The injection mold with four oil cylinder ejection structure according to claim 5, characterized in that, The oil cylinder position fine adjustment structure further comprises an adjusting seat arranged at the left and right sides of the guide groove of the movable mold, and an adjusting screw arranged on the adjusting seat for adjusting the left-right position of the oil cylinder mounting plate during installation.

9. The injection mold with four oil cylinder ejection structure according to claim 5, characterized in that, A heat insulation pad is arranged between the oil cylinder mounting plate and the bottom surface of the guide groove of the movable mold, and the heat insulation pad is sleeved on the outer circle of the bolt for fixing the oil cylinder mounting plate.

10. The injection mold with four oil cylinder ejection structure according to claim 6, characterized in that, Also be matched with set up for in the injection mold test mold when realize four ejection oil cylinder's top tight force test top tight force test device, four pull pressure sensor between the connecting flange corresponding setting in the four ejection oil cylinder's piston rod lower end and the limiting flange of the upper end of the connecting cylinder are included in the test mold, the upper end of the pull pressure sensor and the connecting flange of the piston rod lower end of the ejection oil cylinder are connected through bolt fixing, the lower end of the pull pressure sensor and the limiting flange of the upper end of the connecting cylinder are connected through bolt fixing;Four the pull pressure sensor is connected with the control circuit module with pull pressure display device through signal line respectively.

Images