CN111421765A

CN111421765A - Injection mold capable of improving injection molding precision

Info

Publication number: CN111421765A
Application number: CN202010252213.9A
Authority: CN
Inventors: 廖素英
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-07-17

Abstract

The invention relates to the technical field of injection molds and discloses an injection mold for improving injection molding precision, which comprises a fixed base, wherein guide cylinders are arranged on two sides of the upper end of the fixed base, guide posts are arranged inside the guide cylinders, a top plate is arranged at the top ends of the guide posts, an upper mold is arranged in the middle of the lower end of the top plate through a fixing bolt, fixed cylinders are arranged on two sides of the upper end of the fixed base, a mold seat is arranged at the upper end of the fixed cylinder, a lower mold is arranged in the middle of the upper end of the mold seat, a lifting post is arranged inside the fixed cylinder in a sliding mode, the upper mold is fixedly arranged at the top end of the lifting post, a lead screw is arranged inside the lifting post through an. The invention realizes the stable closing and opening between the upper die and the lower die, greatly increases the precision during injection molding, and simultaneously ensures that the dislocation cannot occur during die assembly by the matching of the guide cylinder and the positioning column, thereby further increasing the injection molding precision.

Description

Injection mold capable of improving injection molding precision

Technical Field

The invention relates to the technical field of injection molds, in particular to an injection mold capable of improving injection molding precision.

Background

The mould is various moulds and tools for obtaining required products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods in industrial production. In short, a mold is a tool for making a shaped article, this tool being composed of various parts, different molds being composed of different parts, which effect the processing of the shape of the article mainly by the change of the physical state of the material being shaped, and it is simply given the name "industrial mother".

Injection molding is a process in which a plastic material that is completely melted is stirred by a screw at a certain temperature, injected into a mold cavity at high pressure, and cooled to solidify to obtain a molded article. The method is suitable for mass production of parts with complex shapes, and is one of important processing methods.

The injection molding is that plastic is first added into the heating material barrel of the injection machine, heated to melt, pushed by the screw or plunger of the injection machine and fed via the nozzle and the mold casting system into the mold cavity, and hardened and formed into injection molded product. Injection molding has a cyclic cycle consisting of injection, pressure holding (cooling) and plastic part demolding, so that injection molding has the characteristic of periodicity. The thermoplastic plastic injection molding has short molding cycle and high production efficiency, the melt has small abrasion to the mold, and plastic parts with complex shapes, clear surface patterns and marks and high dimensional precision can be molded in large batch; however, for plastic parts with large wall thickness variation, it is difficult to avoid molding defects.

Chinese patent (publication number: CN 207736678U) discloses an injection mold for improving injection molding precision, which comprises a lower mold and an upper mold, wherein one side of the lower mold is provided with a controller, the other side of the lower mold is provided with an air pump, and the air pump is electrically connected with the controller; an inner cavity is formed in the lower die, ventilating grooves penetrate through two sides of the inner wall of the inner cavity, and the ventilating grooves are communicated with the air pump; inner chamber internal bottom is provided with elevating system, the lifter plate is installed to the elevating system upper end, the lifter plate with interior cavity clearance fit, the lifter plate bottom is provided with radiating fin, though the device is through setting up all kinds of springs in order to increase the location and the precision of moulding plastics to a certain extent, but in actual operation, can not effectively guarantee the cooperation ability between the upper and lower mould when closed completely, consequently, still needs further improvement.

Disclosure of Invention

The invention aims to provide an injection mold for improving injection precision, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides an improve injection mold of precision of moulding plastics, includes unable adjustment base, unable adjustment base upper end both sides installation guide cylinder, guide cylinder internally mounted guide post, guide post top installation roof, top lower extreme middle part is installed the mould through fixing bolt, unable adjustment base upper end both sides installation fixed cylinder, fixed cylinder upper end installation mould seat, mould seat upper end mid-mounting bed die, the inside slip of fixed cylinder is provided with the lift post, and lift post top fixed mounting bed die, the inside internal thread hole installation lead screw that passes through of lift post, lead screw bottom pass unable adjustment base installation driven gear, and the meshing of driven gear lower extreme has the driving gear, driving gear mid-mounting drive shaft, roof upper end middle part is through connecting bolt installation closing plate, and the closing plate mid-mounting seat of moulding plastics, the seat of moulding plastics is inside to be equipped with the mouth.

As a further scheme of the invention: the supporting legs are installed on two sides of the lower end of the fixed base, the driving shaft is fixed between the supporting legs, the driving motor is installed at one end of the driving shaft, and the driving motor is fixed in the middle of the supporting legs.

As a further scheme of the invention: and guide strips are arranged on the outer sides of the lifting columns.

As a further scheme of the invention: the inner wall of the fixed cylinder is provided with a guide groove matched with the guide strip.

As a further scheme of the invention: and the upper end of the fixed base is provided with a positioning column, and the middle part of the lower end of the die seat is provided with a positioning hole matched with the positioning column.

As a further scheme of the invention: the driving motor is a double-steering stepping motor.

As a further scheme of the invention: and a forming groove matched with the lower die is formed in the middle of the lower end of the upper die.

As a further scheme of the invention: the inside exhaust hole that is equipped with of last mould, exhaust hole bottom and shaping groove intercommunication each other.

As a further scheme of the invention: and guide springs are arranged at the bottom ends of the guide columns and the bottom end inside the guide cylinder.

As a still further scheme of the invention: the inner diameter of the injection molding port is gradually increased from top to bottom.

Compared with the prior art, the invention has the beneficial effects that:

the utility model provides an improve injection mold of precision of moulding plastics, it is rational in infrastructure, the modern design, through mutually supporting between the solid fixed cylinder that is equipped with, lift post and the lead screw, realized stable closure between last mould and the bed die and opened, greatly increased the precision when moulding plastics, simultaneously through the cooperation that sets up guide cylinder and reference column for can not take place the dislocation during the compound die, further increased the precision of moulding plastics, the practicality is strong, and the reliability is high.

Drawings

Fig. 1 is a schematic structural diagram of an injection mold for improving injection precision.

Fig. 2 is a schematic sectional structure view of a-a in fig. 1.

Fig. 3 is a schematic top view of a lower mold of an injection mold for improving injection precision.

Fig. 4 is a schematic view of a bottom view of a lower mold of an injection mold for improving injection precision.

In the figure: 1-a fixed base, 2-supporting legs, 3-a driving shaft, 4-a driving gear, 5-a driven gear, 6-a driving motor, 7-a positioning column, 8-a mold base, 9-a fixed cylinder, 10-a lifting column, 11-a lead screw, 12-a guide cylinder, 13-a guide column, 14-a lower mold, 15-an upper mold, 16-a forming groove, 17-a top plate, 18-a fixed bolt, 19-an exhaust hole, 20-an injection molding base, 21-an injection molding opening, 22-a sealing plate, 23-an internal thread hole, 24-a guide strip, 25-a guide groove and 26-a positioning hole.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1

Referring to fig. 1 to 3, in the embodiment of the invention, an injection mold for improving injection molding precision comprises a fixed base 1, supporting legs 2 are arranged on two sides of the lower end of the fixed base 1 for realizing supporting and limiting of the whole fixed base 1, a driving shaft 3 is fixed between the supporting legs 2 for supporting and limiting rotation of the driving shaft 3 and preventing the driving shaft 3 from shaking in the rotation process, a driving motor 6 is arranged at one end of the driving shaft 3 and used for driving the driving shaft 3 to rotate, the driving motor 6 is fixed in the middle of the supporting legs 2, guide cylinders 12 are arranged on two sides of the upper end of the fixed base 1, guide columns 13 are arranged in the guide cylinders 12, the guide columns 13 can slide up and down along the inner parts of the guide cylinders 12, so that the whole top plate 17 cannot shake in a large range in the up-down moving process, a top plate 17 is, an upper die 15 is installed in the middle of the lower end of a top plate 17 through a fixing bolt 18, fixing cylinders 9 are installed on two sides of the upper end of a fixing base 1, a die base 8 is installed at the upper end of the fixing cylinders 9, a lower die 14 is installed in the middle of the upper end of the die base 8, lifting columns 10 are arranged in the fixing cylinders 9 in a sliding mode, guide strips 24 are arranged on the outer sides of the lifting columns 10, guide grooves 25 matched with the guide strips 24 are formed in the inner walls of the fixing cylinders 9, the guide strips 24 are arranged and matched with the guide grooves 25, so that the whole lifting column 10 cannot rotate horizontally when moving along the inside of the fixing cylinders 9 and does vertical linear motion under the action of a whole lead screw 11, the upper die 15 is fixedly installed at the top ends of the lifting columns 10, a forming groove 16 matched with the lower die 14 is formed in the middle of the lower end of the upper die 15, and a formed material, the lifting column 10 is internally provided with a lead screw 11 through an internal thread hole 23, the bottom end of the lead screw 11 penetrates through a fixed base 1 to be provided with a driven gear 5, the lower end of the driven gear 5 is engaged with a driving gear 4, the driving gear 4 is provided with a driving shaft 3 in the middle, so that the horizontal torque of the driving shaft 3 is converted into the torque in the vertical direction, the middle of the upper end of a top plate 17 is provided with a sealing plate 22 through a connecting bolt for installing and fixing an injection seat 20, the middle of the sealing plate 22 is provided with the injection seat 20, an injection opening 21 is arranged in the injection seat 20, the upper end of the fixed base 1 is provided with a positioning column 7, the middle of the lower end of a mold seat 8 is provided with a positioning hole 26 matched with the positioning column 7, and the driving motor 6 is a double-direction stepping motor, so that the, guide spring is installed with the inside bottom of guide cylinder 12 in the 13 bottoms of guide post, sets up guide spring and can further make guide post 13 can be along guide cylinder 12 from top to bottom stable direction removal, the mouth 21 internal diameter of moulding plastics is from last down crescent, can be so that the inside material of moulding plastics of mouth 21 of moulding plastics can be more quick leading-in to shaping groove 16 inside, avoid moulding plastics mouthful 21 internal forming, further increased the precision of moulding plastics.

Example 2

In another embodiment of the invention, an injection mold for improving injection precision comprises a fixed base 1, supporting legs 2 are arranged on two sides of the lower end of the fixed base 1, a driving shaft 3 is fixed between the supporting legs 2, a driving motor 6 is arranged at one end of the driving shaft 3, the driving motor 6 is fixed in the middle of the supporting legs 2, guide cylinders 12 are arranged on two sides of the upper end of the fixed base 1, guide posts 13 are arranged in the guide cylinders 12, a top plate 17 is arranged at the top ends of the guide posts 13, an upper mold 15 is arranged in the middle of the lower end of the top plate 17 through a fixing bolt 18, fixed cylinders 9 are arranged on two sides of the upper end of the fixed base 1, a mold base 8 is arranged at the upper end of the fixed cylinders 9, a lower mold 14 is arranged in the middle of the upper end of the mold base 8, a lifting post 10 is arranged in the fixed cylinder 9 in a sliding manner, a guide strip, an upper die 15 is fixedly installed at the top end of a lifting column 10, a forming groove 16 matched with a lower die 14 is arranged in the middle of the lower end of the upper die 15, a lead screw 11 is installed in the lifting column 10 through an internal thread hole 23, a driven gear 5 is installed at the bottom end of the lead screw 11 and penetrates through a fixed base 1, a driving gear 4 is meshed at the lower end of the driven gear 5, a driving shaft 3 is installed in the middle of the driving gear 4, a sealing plate 22 is installed in the middle of the upper end of a top plate 17 through a connecting bolt, an injection seat 20 is installed in the middle of the sealing plate 22, an injection port 21 is arranged in the injection seat 20, a positioning column 7 is installed at the upper end of the fixed base 1, a positioning hole 26 matched with the positioning column 7 is arranged in the middle of the lower end of a die seat 8, the driving motor 6 is a double, the difference between this embodiment and the above embodiment is that the upper mold 15 is provided with an exhaust hole 19 inside, the bottom end of the exhaust hole 19 is communicated with the molding groove 16, and the exhaust hole 19 can rapidly exhaust the gas inside the molding groove 16 after molding, so as to avoid forming bubbles on the surface or inside of the molded part.

When the mould opening device is used, materials are injected into the forming groove 16 through the injection molding opening 21, after forming is finished, the driving motor 16 is started, the driving motor 16 drives the driving shaft 3 to rotate, then the driving gear 4 and the driven gear 5 are matched to enable the screw rod 11 to rotate, and further the lifting column 10 enables the upper mould 15 to move upwards along the inside of the fixed cylinder 9, so that the mould opening effect is realized, and the whole process is simple, quick and convenient to operate. The invention has reasonable structure and novel design, realizes the stable closing and opening between the upper die 15 and the lower die 14 through the mutual matching of the fixed cylinder 9, the lifting column 10 and the lead screw 11, greatly increases the precision during injection molding, simultaneously ensures that the dislocation cannot occur during die assembly through the matching of the guide cylinder 12 and the positioning 13 column, further increases the injection molding precision, and has strong practicability and high reliability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An injection mold for improving injection molding precision comprises a fixed base (1), guide cylinders (12) are installed on two sides of the upper end of the fixed base (1), guide columns (13) are installed inside the guide cylinders (12), and is characterized in that a top plate (17) is installed at the top ends of the guide columns (13), an upper mold (15) is installed in the middle of the lower end of the top plate (17) through a fixing bolt (18), fixed cylinders (9) are installed on two sides of the upper end of the fixed base (1), a mold seat (8) is installed at the upper end of each fixed cylinder (9), a lower mold (14) is installed at the middle of the upper end of each mold seat (8), a lifting column (10) is arranged inside the fixed cylinders (9) in a sliding mode, an upper mold (15) is fixedly installed at the top ends of the lifting columns (10), a lead screw (11) is installed inside each lifting column (10) through an internal thread hole (23), and a, driven gear (5) lower extreme meshing has driving gear (4), driving gear (4) mid-mounting drive shaft (3), roof (17) upper end middle part is through connecting bolt installation closing plate (22), and closing plate (22) mid-mounting seat (20) of moulding plastics, and seat (20) inside of moulding plastics is equipped with the mouth (21) of moulding plastics.

2. An injection mold for improving injection precision according to claim 1, characterized in that supporting legs (2) are installed on two sides of the lower end of the fixed base (1), the driving shaft (3) is fixed between the supporting legs (2), a driving motor (6) is installed at one end of the driving shaft (3), and the driving motor (6) is fixed in the middle of the supporting legs (2).

3. An injection mould for improving injection accuracy according to claim 1, characterized in that the lifting column (10) is provided with guide strips (24) on the outside.

4. An injection mould for improving injection precision according to claim 3, characterized in that the inner wall of the fixed cylinder (9) is provided with a guide groove (25) which is matched with the guide strip (24).

5. An injection mold for improving injection precision according to claim 1, characterized in that the upper end of the fixed base (1) is provided with a positioning column (7), and the middle part of the lower end of the mold base (8) is provided with a positioning hole (26) which is matched with the positioning column (7).

6. An injection mould for improving injection accuracy according to claim 1, characterized in that the driving motor (6) is a double-steering stepping motor.

7. An injection mould for improving injection precision according to claim 1, characterized in that the middle of the lower end of the upper mould (15) is provided with a forming groove (16) which is matched with the lower mould (14).

8. An injection mold for improving injection precision according to claim 7, characterized in that the upper mold (15) is provided with a vent hole (19) inside, and the bottom end of the vent hole (19) is communicated with the forming groove (16).

9. An injection mold for improving injection precision according to claim 1, characterized in that the bottom ends of the guide posts (13) and the bottom ends inside the guide cylinder (12) are provided with guide springs.

10. An injection mold for improving injection accuracy according to claim 1 or 9, wherein the inner diameter of the injection port (21) is gradually increased from top to bottom.