CN112060474B

CN112060474B - Working method of automatic demoulding type injection mould with replaceable mould

Info

Publication number: CN112060474B
Application number: CN202010905234.6A
Authority: CN
Inventors: 孙超月; 洪思宜
Original assignee: Dongguan Yake Product Development Co ltd
Current assignee: Dongguan Yake Product Development Co ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2022-06-28
Anticipated expiration: 2040-09-01
Also published as: CN112060474A

Abstract

The invention relates to the technical field of molds, in particular to a working method of an automatic demolding type injection mold with a replaceable mold, which comprises a first rotating disk and a second rotating disk which are symmetrically arranged, wherein an upper mold and a lower mold which are matched are symmetrically arranged between the first rotating disk and the second rotating disk, a mounting frame is arranged on the outer sides of the first rotating disk and the second rotating disk, the first rotating disk is fixedly sleeved on a driving shaft, the second rotating disk is sleeved on the driving shaft in a sliding mode, a plurality of sliding blocks are fixedly arranged on the second rotating disk, a plurality of sliding grooves matched with the sliding blocks are uniformly distributed on the annular side wall of the driving shaft, a control assembly for controlling the second rotating disk to move is arranged on the mounting frame, and a cooling ejection assembly communicated with the lower mold is arranged on the mounting frame. The injection mold can be conveniently replaced without stopping operation, and the injection molding part can be conveniently demolded, so that the demolding is convenient, the demolding position can be well cooled, and the damage to the injection molding part is reduced.

Description

Working method of automatic demoulding type injection mould with replaceable mould

Technical Field

The invention relates to the technical field of molds, in particular to a working method of an automatic demolding type injection mold with a replaceable mold.

Background

The injection molding die is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and accurate dimensions, hot colloid is injected between the upper die and the lower die for cooling in the injection molding operation, and injection molding is completed after a specific shape is formed, so that the efficiency is high; most simple structure of current injection mold, it is troublesome to change, only can be applicable to the use of a product, and when processing other products, it is not swift enough to change, and in addition, most injection mold pass through the ejector pin when the drawing of patterns and accomplish more, and the ejector pin position can't set up cooling structure, and the ejector pin position cooling appears easily not thoroughly, appears the deformation condition when receiving ejecting action.

Chinese patent application No.: CN 201811578323.3; the utility model discloses a removable automatic drawing of patterns type injection mold of mould, the bottom of mould body is provided with the base, the mid-mounting at base top has the die holder, the inside of die holder is provided with the recess, first electric putter is installed to the both sides of recess bottom, the bottom plate is installed on first electric putter's top, the mid-mounting of bottom plate bottom has the aspiration pump, the bed die is installed at the top of bottom plate, second electric putter is installed to the both sides on die holder top, the support is installed in the four corners at base top, the roof is installed on the top of support, electronic jar is installed at the top of roof, the bottom fixedly connected with telescopic link of electronic jar, the upper die base is installed to the bottom of telescopic link, the upper die is installed to the bottom of upper die base, the middle part of upper die and bed die is provided with the formed part, the truckle is installed to the bottom of base.

This solution has the following drawbacks:

1. the replacement of the die is not convenient and quick enough, the rapid switching function is not available, and meanwhile, the shutdown operation is needed during the replacement;

2. the device has realized ejecting drawing of patterns, but ejecting position can't set up cooling structure, appears ejecting position ejecting deformation that the cooling produced incompletely easily, destroys the injection molding.

Disclosure of Invention

The invention aims to provide an automatic demoulding type injection mould with a replaceable mould.

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

the working steps of the automatic demoulding type injection mould with the replaceable mould are as follows:

a) when injection molding is carried out, the second rotating disc is made to move by stretching the plurality of pneumatic telescopic rods, the lower die is driven to move when the second rotating disc moves, so that the lower die is attached to the upper die, the injection molding machine carries out injection molding operation on an injection port on the upper die along the injection bearing hole on the attaching disc, and the upper die and the lower die are subjected to injection molding;

b) after injection molding is finished, cold water is injected into a cooling cavity in the lower die through an external water cooling device by utilizing a water inlet pipe to cool an injection molding piece, meanwhile, water absorbing heat is guided into the water cooling device by utilizing a water outlet pipe to circulate, when demolding is needed, the lower die can be separated from the upper die by utilizing the shortening of a plurality of pneumatic telescopic rods, then an electromagnetic valve on the water outlet pipe is closed, a support column is pushed to move upwards by utilizing water pressure, and the injection molding piece is ejected out of the lower die and falls off;

c) After demolding is finished, closing the electromagnetic valve on the water inlet pipe, pumping water into the water cooling device, retracting the support column into the circular groove again under the action of the two limiting springs, and then repeatedly performing the operations for injection molding;

d) when needing to dismantle bed die and bed die, step motor can be opened, the bed die and the bed die that will change rotate to the position that does not correspond with the injection molding machine, when moulding plastics, through driving two servo motor work, servo motor during operation, drive one of them threaded rod and rotate, two threaded rods rotate simultaneously through the drive mode of band pulley belt, thereby make two threaded rods rotate simultaneously, when the threaded rod rotates, because two opposite screw threads on the threaded rod, make two sliding block relative movement, thereby drive two movable blocks relative movement, a plurality of spacing fixture blocks on two movable blocks break away from a plurality of draw-in grooves on the frame type piece, can remove lower mould and bed die and take out.

The invention has the beneficial effects that:

according to the invention, the first rotating disc and the second rotating disc are arranged, the upper die and the lower die are correspondingly arranged on the first rotating disc and the second rotating disc, so that injection molding operation can be carried out, and meanwhile, a plurality of groups of different injection molds can be arranged, so that the injection molds can be conveniently replaced when needed, and the injection molds have higher applicability; meanwhile, when the upper die and the lower die need to be disassembled and replaced, the injection molds can be rotated to the position where the injection operation is not performed, then the limiting sliding is released for taking down, the first fixing assembly and the second fixing assembly are convenient to operate, the fixing efficiency and the fixing releasing efficiency are high, and the stop operation is not needed; meanwhile, a cooling ejection assembly is arranged in the lower die, the injection molding piece can be ejected out, the support columns at ejection positions adopt a hollow design, cooling liquid can enter the interior of the support columns, the ejection positions of the injection molding piece are prevented from being cooled incompletely, and the injection molding piece is prevented from being damaged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic top perspective view of the present invention;

FIG. 4 is a perspective view of a first rotating disk and a second rotating disk of the present invention;

FIG. 5 is a schematic left side view of two frame blocks according to the present invention;

FIG. 6 is a schematic diagram of a right side perspective structure of two frame blocks according to the present invention;

FIG. 7 is a schematic perspective view of the upper and lower molds of the present invention;

fig. 8 is a schematic internal perspective view of the support post of the present invention.

In the figure:

1 first rotating disk, 2 second rotating disks, 3 last moulds, 4 bed dies, 5 mounting brackets, 6 drive shafts, 7 step motor, 8 type pieces, 9 mounting frames, 10 fixing bolt, 11 movable blocks, 12 spacing fixture blocks, 13 servo motor, 14 sliding blocks, 15 threaded rods, 16 belt pulleys, 17 pneumatic telescopic link, 18 inlet tubes, 19 outlet pipes, 20 solenoid valves, 21 support columns, 22 junction pipes, 23 telescopic links, 24 spacing springs, 25 soft rubber cylinders, 26 injection molding machines, 27 laminating disks.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Wherein the showings are for the purpose of illustration only and not for the purpose of limiting the same, the same is shown by way of illustration only and not in the form of limitation; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product.

Referring to fig. 1, 2, 3 and 4, an automatic demoulding type injection mold with replaceable mold comprises a first rotating disc 1 and a second rotating disc 2 which are symmetrically arranged, an upper mold 3 and a lower mold 4 which are matched are symmetrically arranged between the first rotating disc 1 and the second rotating disc 2, the upper mold 3 and the lower mold 4 can be subjected to injection molding operation, a plurality of first fixing components for fixing the upper mold 3 are arranged on the first rotating disc 1, a plurality of second fixing components for fixing the lower mold 4 are arranged on the second rotating disc 2, the upper mold 3 and the lower mold 4 can be both subjected to disassembly operation, a mounting frame 5 is arranged outside the first rotating disc 1 and the second rotating disc 2 and used for mounting and disassembly of the whole device, a driving shaft 6 is horizontally and rotatably arranged on the mounting frame 5, two ends of the driving shaft 6 are rotatably connected with the mounting frame 5, the first rotating disc 1 is fixedly sleeved on the driving shaft 6, fixed step motor 7 that is provided with on mounting bracket 5, step motor 7 output run through mounting bracket 5 and with the coaxial fixed connection of drive shaft 6, step motor 7 adopts prior art, can drive shaft 6 and rotate, 2 slip covers of second rolling disc are established on drive shaft 6, second rolling disc 2 can slide on drive shaft 6, the fixed a plurality of sliders that are equipped with on the second rolling disc 2, the equipartition has a plurality of spouts that match with the slider on the 6 annular lateral wall of drive shaft, drive shaft 6 can drive 2 rotations of second rolling disc simultaneously, be equipped with the control assembly of control 2 removals of second rolling disc on the mounting bracket 5, be equipped with the ejecting subassembly of cooling with the 4 intercommunications of bed die on the mounting bracket 5, can ejecting injection molding when cooling injection molding, be equipped with the injection molding subassembly that corresponds with last mould 3 on the mounting bracket 5, be used for the operation of moulding plastics.

As shown in fig. 5 and fig. 6, the first fixing component includes a frame block 8, the frame block 8 is fixedly connected with the first rotating disc 1 through a fixing arm, an installation frame 9 is fixedly arranged on the upper die 3, the upper die 3 is fixedly connected with the installation frame 9 through a plurality of fixing bolts 10, the upper die 3 can be detached from the installation frame 9, two moving blocks 11 are symmetrically arranged on the upper side of the frame block 8, a plurality of limiting clamping blocks 12 are arranged on the end surfaces, close to each other, of the two moving blocks 11, a plurality of clamping grooves matched with the limiting clamping blocks 12 are arranged on the two side walls of the installation frame 9, the limiting clamping blocks 12 are clamped into the clamping grooves to achieve limiting effect, a driving component for driving the two moving blocks 11 to move relatively is arranged on the frame block 8, and clamping and loosening actions can be achieved.

As shown in fig. 5 and 6, the driving assembly includes a servo motor 13 fixedly disposed on the side wall of the frame block 8, two sliding blocks 11 are symmetrically and fixedly disposed at the lower ends of the two moving blocks 11, the frame block 8 is symmetrically disposed with two sliding grooves matching with the sliding blocks 14, so that the moving blocks 11 can slide, two sliding grooves are horizontally disposed with a threaded rod 15, two ends of the threaded rod 15 are rotatably connected with the inner wall of the sliding groove, two opposite threads are disposed on the threaded rod 15, the two sliding blocks 14 are respectively fitted on the two opposite threads, the threaded rod 15 can drive the two sliding blocks 14 to move relatively when rotating, the two threaded rods 15 both penetrate through the frame block 8 and are coaxially and fixedly connected with a belt wheel 16, the two belt wheels 16 are connected by belt transmission, the two threaded rods 15 rotate synchronously, the output end of the servo motor 13 penetrates through the frame block 8 and is coaxially and fixedly connected with one of the threaded rods 15, the servo motor 13 can drive the two threaded rods 15 to rotate simultaneously by adopting the prior art.

As shown in fig. 5 and 6, the second fixing member has the same structure as the first fixing member, and the lower mold 4 can be attached and detached by the same operation.

As shown in fig. 1, fig. 2 and fig. 3, it is including encircleing a plurality of pneumatic telescopic links 17 that set up around drive shaft 6 to remove the subassembly, it is equipped with the carousel to rotate on the mounting bracket 5, a plurality of pneumatic telescopic links 17 are all fixed to be set up on the carousel of mounting bracket 5, a plurality of pneumatic telescopic links 17's flexible end all with 2 fixed connection of second rolling disc, flexible effect through a plurality of pneumatic telescopic links 17, can drive second rolling disc 2 and remove, thereby mould 4 and last mould 3's compound die and branch mould under the control.

As shown in fig. 1, 3 and 7, the cooling ejection assembly includes a water inlet pipe 18 and a water outlet pipe 19 fixedly disposed on the mounting frame 5, both the water inlet pipe 18 and the water outlet pipe 19 are fixedly connected with an external water cooling device, the external water cooling device can adopt the prior art to provide the action of water circulation cooling, both the water inlet pipe 18 and the water outlet pipe 19 are fixedly connected with an electromagnetic valve 20 which can be controlled to open and close to perform on-off operation, the upper end surface of the lower mold 4 is provided with a circular groove, a support post 21 is disposed in the circular groove in a matching manner, the support post 21 is slidably disposed in the circular groove in a sealing manner, the support post 21 can perform ejection action on the injection molding piece, a cooling cavity is disposed in the lower mold 4, the injection molding piece is cooled after the cooling cavity is filled with water, through holes communicating the cooling cavity are disposed on both side walls of the lower mold 4, both the water inlet pipe 18 and the water outlet pipe 19 are rotatably connected with a connection short pipe 22, and external threads are disposed on the outer wall of the connection short pipe 22, be equipped with the internal thread that matches with the external screw thread on the through-hole inner wall, inlet tube 18 and outlet pipe 19 can be connected, also can dismantle simultaneously, be equipped with the opening of intercommunication cooling cavity on the circular recess diapire, support post 21 adopts hollow structure, and the terminal surface is equipped with the water inlet of the inside cavity of intercommunication under supporting post 21, support post 21 inside also can be full of the cooling water, cool off the liftout position, it is not good to avoid setting up the cooling that ejecting structure leads to, thereby deformation appears in the injection molding when avoiding ejecting, be equipped with in the circular recess and carry out spacing subassembly of spacing elasticity to support post 21.

As shown in fig. 8, the elastic limiting component comprises two fixing blocks symmetrically and fixedly arranged on the bottom wall of the circular groove, two telescopic rods 23 are symmetrically arranged in the support column 21, the lower end of each telescopic rod 23 is fixedly connected with the corresponding fixing block, the upper end of each telescopic rod 23 is fixedly connected with the support column 21, and each telescopic rod 23 is fixedly sleeved with a limiting spring 24 for limiting the telescopic movement of the corresponding telescopic rod, so that elastic force is provided through the limiting spring 24, after water is pumped out, the support column 21 can be reset through the limiting spring 24, and therefore subsequent injection molding operation is facilitated.

As shown in fig. 3 and 4, the injection molding assembly comprises an injection molding machine 26 fixedly arranged on the mounting frame 5, the injection molding machine 26 adopts the prior art, a plurality of frame blocks 8 on the first rotating disc 1 are internally provided with a fitting disc 27, the fitting disc 27 is fixedly connected with the frame blocks 8 through two connecting blocks, the fitting disc 27 is provided with an injection molding receiving hole corresponding to the position of the injection molding machine 26, the fitting disc 27 is in sealing contact with the upper mold 3 and the injection molding machine 26, thereby ensuring that after the rotation action is performed, the injection molding machine 26 can still perform injection molding operation on the replaced upper mold 3, a structure for sealing can be arranged on the injection molding end of the injection molding machine 26 and the injection molding receiving hole of the fitting disc 27, and ensuring the sealing performance.

The replaceable automatic demolding type injection mold comprises the following working steps:

a) when injection molding is carried out, the second rotating disc 2 moves by stretching the plurality of pneumatic telescopic rods 17, the lower die 4 is driven to move when the second rotating disc 2 moves, so that the lower die 4 is attached to the upper die 3, the injection molding machine 26 carries out injection molding operation on an injection port on the upper die 3 along the injection bearing hole on the attaching disc 27 at the moment, and the upper die 3 and the lower die 4 are subjected to injection molding;

b) after injection molding is finished, cold water is injected into a cooling cavity in the lower die 4 through an external water cooling device by using the water inlet pipe 18 to cool an injection molded part, meanwhile, water absorbing heat is guided into the water cooling device by using the water outlet pipe 19 to circulate, when demolding is needed, the lower die 4 can be separated from the upper die 3 by using the shortening of a plurality of pneumatic telescopic rods 17, then the electromagnetic valve 20 on the water outlet pipe 19 is closed, the support column 21 is pushed to move upwards by using water pressure, and the injection molded part is ejected from the lower die 4 and falls;

c) after demolding is finished, closing the electromagnetic valve 20 on the water inlet pipe 18, pumping water back to the water cooling device, retracting the support column 21 into the circular groove again under the action of the two limiting springs 24, and then repeatedly performing the operations for injection molding;

d) When the upper die 3 and the lower die 4 need to be disassembled, the stepping motor 7 can be opened, the upper die 3 and the lower die 4 to be replaced are rotated to positions which do not correspond to the injection molding machine 26, when the injection molding is carried out, the two servo motors 13 are driven to work, the servo motors 13 drive one of the threaded rods 15 to rotate, the two threaded rods 15 rotate simultaneously in a transmission mode through the belt of the belt wheel 16, so that the two threaded rods 15 rotate simultaneously, when the threaded rods 15 rotate, two sections of opposite threads on the threaded rods 15 enable the two sliding blocks 14 to move relatively, so that the two moving blocks 11 are driven to move relatively, a plurality of limiting clamping blocks 12 on the two moving blocks 11 are separated from a plurality of clamping grooves on the frame block 8, and the lower die 4 and the upper die 3 can be moved out.

The foregoing is merely illustrative and explanatory of the present invention and various modifications, additions or substitutions may be made to the specific embodiments described by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The working method of the automatic demolding type injection mold with the replaceable mold is characterized in that the automatic demolding type injection mold comprises a first rotating disk (1) and a second rotating disk (2) which are symmetrically arranged, an upper mold (3) and a lower mold (4) which are matched with each other are symmetrically arranged between the first rotating disk (1) and the second rotating disk (2), a plurality of first fixing assemblies for fixing the upper mold (3) are arranged on the first rotating disk (1), a plurality of second fixing assemblies for fixing the lower mold (4) are arranged on the second rotating disk (2), mounting frames (5) are arranged on the outer sides of the first rotating disk (1) and the second rotating disk (2), a driving shaft (6) is horizontally arranged on the mounting frames (5) in a rotating mode, the two ends of the driving shaft (6) are rotatably connected with the mounting frames (5), the first rotating disk (1) is fixedly sleeved on the driving shaft (6), the automatic injection molding device is characterized in that a stepping motor (7) is fixedly arranged on the mounting rack (5), the output end of the stepping motor (7) penetrates through the mounting rack (5) and is coaxially and fixedly connected with the driving shaft (6), the second rotating disc (2) is sleeved on the driving shaft (6) in a sliding mode, a plurality of sliding blocks are fixedly arranged on the second rotating disc (2), a plurality of sliding grooves matched with the sliding blocks are uniformly distributed in the annular side wall of the driving shaft (6), a control assembly for controlling the second rotating disc (2) to move is arranged on the mounting rack (5), a cooling ejection assembly communicated with the lower mold (4) is arranged on the mounting rack (5), and an injection molding assembly corresponding to the upper mold (3) is arranged on the mounting rack (5); the working method comprises the following steps: when the upper die and the lower die need to be disassembled, the stepping motor is turned on, the upper die and the lower die which need to be replaced are rotated to positions which do not correspond to an injection molding machine, when the injection molding is carried out, the two servo motors are driven to work, when the servo motors work, one of the threaded rods is driven to rotate, the two threaded rods rotate simultaneously in a transmission mode of a belt wheel and belt, so that the two threaded rods rotate simultaneously, when the threaded rods rotate, two sliding blocks move relatively due to two sections of opposite threads on the threaded rods, so that the two moving blocks are driven to move relatively, a plurality of limiting clamping blocks on the two moving blocks are separated from a plurality of clamping grooves on the frame-shaped block, and the lower die and the upper die are moved and taken out;

The first fixing assembly comprises a frame block (8), the frame block (8) is fixedly connected with a first rotating disc (1) through a fixing arm, an installing frame (9) is fixedly arranged on an upper die (3), the upper die (3) is fixedly connected with the installing frame (9) through a plurality of fixing bolts (10), two moving blocks (11) are symmetrically arranged on the upper side of the frame block (8), a plurality of limiting clamping blocks (12) are arranged on the end faces, close to each other, of the moving blocks (11), a plurality of clamping grooves matched with the limiting clamping blocks (12) are formed in the two side walls of the installing frame (9), and a driving assembly for driving the two moving blocks (11) to move relatively is arranged on the frame block (8).

2. The working method of the replaceable automatic demolding type injection mold of claim 1, wherein the driving assembly comprises a servo motor (13) fixedly arranged on the side wall of the frame-shaped block (8), the lower ends of the two moving blocks (11) are symmetrically and fixedly provided with two sliding blocks (14), the frame-shaped block (8) is symmetrically provided with two sliding grooves matched with the sliding blocks (14), the two sliding grooves are horizontally provided with threaded rods (15), the two ends of each threaded rod (15) are rotatably connected with the inner wall of the corresponding sliding groove, the threaded rod (15) is provided with two sections of opposite threads, the two sliding blocks (14) are respectively sleeved on the two sections of opposite threads in a matching manner, the two threaded rods (15) penetrate through the frame-shaped block (8) and are coaxially and fixedly connected with belt wheels (16), and the two belt wheels (16) are connected through a belt transmission, the output end of the servo motor (13) penetrates through the frame-shaped block (8) and is coaxially and fixedly connected with one of the threaded rods (15).

3. The operating method of an automatic release type injection mold with a replaceable mold as set forth in claim 2, wherein the second fixing member is identical in structure to the first fixing member.

4. The working method of the automatic demoulding type injection mould with the replaceable mould as claimed in claim 1, characterized by comprising a plurality of pneumatic telescopic rods (17) arranged around the driving shaft (6), wherein a turntable is arranged on the mounting rack (5) in a rotating manner, the plurality of pneumatic telescopic rods (17) are all fixedly arranged on the turntable of the mounting rack (5), and the telescopic ends of the plurality of pneumatic telescopic rods (17) are all fixedly connected with the second turntable (2).

5. The working method of the automatic demoulding injection mold with the replaceable mold as claimed in claim 1, wherein the cooling ejection assembly comprises a water inlet pipe (18) and a water outlet pipe (19) fixedly arranged on the mounting frame (5), the water inlet pipe (18) and the water outlet pipe (19) are both fixedly connected with an external water cooling device, the water inlet pipe (18) and the water outlet pipe (19) are both fixedly connected with electromagnetic valves (20), the upper end surface of the lower mold (4) is provided with a circular groove, a support column (21) is arranged in the circular groove in a matching manner, the support column (21) is arranged in the circular groove in a sealing and sliding manner, a cooling cavity is arranged in the lower mold (4), through holes communicated with the cooling cavity are arranged on both side walls of the lower mold (4), and the water inlet pipe (18) and the water outlet pipe (19) are both rotatably connected with a short connecting pipe (22), the connecting short pipe is characterized in that an external thread is arranged on the outer wall of the connecting short pipe (22), an internal thread matched with the external thread is arranged on the inner wall of the through hole, an opening communicated with a cooling cavity is formed in the bottom wall of the circular groove, the supporting column (21) adopts a hollow structure, a water inlet communicated with an internal cavity is formed in the lower end face of the supporting column (21), and an elastic limiting assembly for limiting the supporting column (21) is arranged in the circular groove.