CN210705688U

CN210705688U - Injection device of wood grain machine

Info

Publication number: CN210705688U
Application number: CN201921374700.1U
Authority: CN
Inventors: 张龙启; 蔡冬杰; 叶群方; 阮剑波; 罗杰; 焦君涛
Original assignee: Ningbo Haitian Beihua Science and Technology Co Ltd
Current assignee: Haitian Plastics Machinery Group; Ningbo Haitian Beihua Science and Technology Co Ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-06-09
Anticipated expiration: 2029-08-22

Abstract

The utility model relates to an injection molding machine technical field discloses an injection device of wood grain machine, including: the main injection component is provided with a first material storage chamber in the middle and a nozzle at the front end; the main screw is arranged in the first material storage chamber; the main charging hopper is arranged on the main charging barrel, and the first pre-molding motor is used for driving the main screw rod to rotate; the main injection part is used for driving the main screw rod to move; the middle part of the auxiliary material cylinder is provided with a second material storage chamber, and the auxiliary screw rod is arranged in the second material storage chamber; the auxiliary charging hopper is arranged on the auxiliary charging barrel, and the second pre-molding motor is used for driving the auxiliary screw rod to rotate; the auxiliary injection part is used for driving the auxiliary screw rod to move; the main material cylinder is communicated with the auxiliary material cylinder through a connecting piece, so that the molten material in the second material storage chamber can be injected into the first material storage chamber; and a one-way valve is arranged in the connecting piece. The utility model has the advantages that the injection device has good color mixing effect, and the produced wood grain color is close to the texture of natural wood grain; the whole structure is compact, the installation and the maintenance are convenient, and the modularization is easy.

Description

Injection device of wood grain machine

Technical Field

The utility model relates to an injection molding machine technical field especially relates to an injection device of wood grain machine.

Background

The wood grain injection molding machine is mainly applied to molding products with the flowing grain appearance (such as wood grains and natural marble grains) requirements. At present, when a product with more than two colors is subjected to injection molding, two modes are commonly used:

the first method is to use a two-color mold for injection molding, i.e., two plastic materials are injected on the same injection molding machine and molded twice, after the primary color is molded for the first time, the mold is rotated 180 degrees to mold the second color, which is usually completed by one set of mold and needs a special two-color injection molding machine (such as a turntable injection molding machine), but the two-color mold is mainly suitable for products with clear colors.

The other method is that when the plastic is stored, materials with two or more colors are mixed, stored and melted together, and injection molding is carried out through the same injection molding machine and the same set of mold. However, when the product with the flow pattern appearance is formed in the form, plastics with two colors are subjected to long-time mixing by the same screw, the color mixing effect is too uniform, and the effect of natural wood pattern color cannot be achieved.

As publication number "CN 109760266A" disclose an electronic injection pivot formula double-colored injection molding machine of R type, belong to injection molding machine technical field, it includes: the mold closing part comprises a fixed mold and a movable mold movably connected with the fixed mold through a screw, a middle support oil cylinder is axially arranged on one side of the movable mold, which is far away from the fixed mold, a rotating shaft device is arranged on the movable mold, the rotating shaft device comprises a rotating shaft which is axially and movably arranged on the movable mold in a penetrating way, and the middle support oil cylinder is connected with the rotating shaft; the injection part comprises a main injection seat and an auxiliary injection seat which are stacked up and down, the auxiliary injection seat is obliquely arranged on the upper portion of the main injection seat, the main injection seat comprises a main electric injection device, a main electric pre-molding device and a main screw charging barrel which are sequentially connected, the main screw charging barrel is provided with a main nozzle used for extending into the fixed die, the auxiliary injection seat comprises an auxiliary electric injection device, an auxiliary electric pre-molding device and an auxiliary screw charging barrel which are sequentially connected, and the auxiliary screw charging barrel is provided with an auxiliary nozzle used for extending into the fixed die. In this scheme, two nozzles are adopted to the double-colored injection molding machine and are spouted the sizing material of a colour respectively, form a colour separately, but to the goods of lines such as grain, natural marble, can't be through this injection molding machine shaping.

Aiming at the defects of the existing injection molding machine, the injection device of the wood grain machine which has good color mixing effect, simple and compact structure and easy modularization needs to be designed.

Disclosure of Invention

The above is not enough to prior art, the utility model aims to solve the technical problem that an injection device of colour mixture is effectual, simple structure is compact, and easily modular wood grain machine is proposed.

The utility model provides a technical scheme that its technical problem adopted is, provides an injection device of wood grain machine, including:

the main injection assembly comprises a main material cylinder, a main feeding hopper, a main screw rod, a main injection part and a first pre-molding motor; the middle part of the main material barrel is provided with a first material storage chamber, and the front end of the main material barrel is provided with a nozzle communicated with the first material storage chamber; the main screw rod is movably arranged in the first material storage chamber; the main charging hopper is arranged on the main charging barrel and is communicated with the first storage chamber; the first pre-molding motor is used for driving the main screw rod to rotate; the main injection piece is used for driving the main screw rod to move;

the auxiliary injection assembly comprises an auxiliary charging barrel, an auxiliary charging hopper, an auxiliary screw, an auxiliary injection part and a second pre-molding motor; the middle part of the auxiliary charging barrel is provided with a second storage chamber, and the auxiliary screw rod is movably arranged in the second storage chamber; the auxiliary charging hopper is arranged on the auxiliary charging barrel and is communicated with the second storage chamber; the second pre-molding motor is used for driving the auxiliary screw rod to rotate; the auxiliary injection part is used for driving the auxiliary screw rod to move;

the main material barrel and the auxiliary material barrel are communicated through a connecting piece, so that the molten material in the second material storage chamber can be injected into the first material storage chamber; and a one-way valve for preventing the melt from flowing back from the first storage chamber to the second storage chamber is arranged in the connecting piece.

Further, the main screw comprises a feeding section, a compression section and a metering section in sequence; the molten material in the second storage chamber can be injected into the metering section of the main screw in the first storage chamber through the connecting piece.

Further, the main injection part is a double hydraulic cylinder, and the auxiliary injection part is a single hydraulic cylinder; and the melt in the first storage chamber is discharged from the nozzle through double-cylinder balanced injection, and the melt in the second storage chamber is discharged into the first storage chamber through single-cylinder precise injection.

Further, still include the supporting component, the supporting component includes:

a main injection platform front plate, a main injection platform rear plate, a machine barrel guide rail and a machine barrel support; the machine barrel guide rail is arranged below the main material barrel, and the machine barrel support is arranged below the machine barrel guide rail; the main material barrel is arranged on a front plate of a main injection table, a rear plate of the main injection table is arranged in parallel with the front plate of the injection table, and the first pre-molding motor is arranged on the rear plate of the main injection table;

the auxiliary injection platform comprises an auxiliary injection platform front plate, an auxiliary injection platform rear plate, a cushion block and a support base; the auxiliary charging barrel is arranged on the front plate of the auxiliary injection platform; the auxiliary shooting table front plate is arranged on the main shooting table front plate through the cushion block and the supporting base in sequence; the auxiliary injection platform rear plate is arranged behind the auxiliary injection platform front plate, and the second pre-molding motor and the auxiliary injection part are both arranged on the auxiliary injection platform rear plate.

Further, the rectification assembly comprises: the whole moving oil cylinder, the connecting rod piece, the guide rod support, the guide rod and the guide sliding block can slide along the guide rod;

the whole moving oil cylinder is connected with the front plate of the main injection platform through a connecting rod piece; the main injection platform front plate and the main injection platform rear plate are arranged on the guide rod through the guide sliding block, and the guide rod is arranged on the guide rod support.

Further, the secondary injection assembly is arranged obliquely relative to the primary injection assembly.

Furthermore, a plurality of heaters are sleeved on the outer ring of the main material cylinder and the outer ring of the auxiliary material cylinder; the main injection part and the auxiliary injection part comprise travel switches.

Compared with the prior art, the utility model discloses following beneficial effect has at least:

in the utility model, the main color material is plasticized and melted by the main injection component; the auxiliary injection assembly plasticizes and melts the wood grain pigment; both are performed simultaneously. The melting wood grain pigment in the auxiliary charging barrel is intermittently injected into the main charging barrel through the one-way valve and is positioned in the metering section of the main screw, the main screw mixes the main pigment and the wood grain pigment, the mixture is injected into a mold through a nozzle, and a product with wood grain color is formed. The main injection component and the auxiliary injection component are obliquely arranged, so that the structure is compact; the main injection assembly and the auxiliary injection assembly are connected through the connecting piece and the supporting assembly and are arranged on the guide rod support, so that the structure of the whole injection device is simplified, the injection device is easy and convenient to mount, and modularization is easy to realize.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the structure of FIG. 2 after rotating an angle;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;

fig. 5 is a specific injection molding process diagram of the injection device of the wood grain machine of the present invention.

In the figures, 1, the main injection assembly; 10. a primary feed cylinder; 11. a main hopper; 12. a main screw; 13. a primary injection member; 14. a first pre-molding motor; 15. a nozzle; 100. a first material storage chamber; 2. a secondary injection assembly; 20. an auxiliary charging barrel; 21. an auxiliary hopper; 22. an auxiliary screw; 23. a secondary injection member; 24. a second pre-molding motor; 200. a second material storage chamber; 3. a coupling member; 30. a one-way valve; 4. a support assembly; 40. a main injection table front plate; 41. a main injection table back plate; 42. a barrel guide; 43. supporting a machine barrel; 44. a front plate of the auxiliary injection platform; 45. a secondary injection table back plate; 46. cushion blocks; 47. a support base; 5. a rectification component; 50. the oil cylinder is moved in an integral mode; 51. connecting rod pieces; 52. a guide rod support; 53. a guide bar; 54. a guide slider; 60. a heater; 61. adjusting the pressing strip; 62. tightening the nut mechanically; 63. a coupling is provided.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 4, an injection device for a wood grain machine includes: a main injection assembly 1, a sub-injection assembly 2, a coupling 3, a support assembly 4 and an panning assembly 5. The main injection assembly 1 comprises a main material barrel 10, a main feeding hopper 11, a main screw 12, a main injection piece 13, a first pre-molding motor 14 and a nozzle 15. The secondary injection assembly 2 comprises a secondary cartridge 20, a secondary hopper 21, a secondary screw 22, a secondary injection member 23 and a second pre-moulding motor 24. The support assembly 4 comprises a main injection platform front plate 40, a main injection platform rear plate 41, a barrel guide rail 42, a barrel support 43, an auxiliary injection platform front plate 44, an auxiliary injection platform rear plate 45, a spacer 46 and a support base 47. The displacement assembly 5 comprises a displacement cylinder 50, a connecting rod 51, a guide rod support 52, a guide rod 53 and a guide slide block 54. Since the main injection unit 1, the sub-injection unit 2, the support unit 4 and the translation unit 5 are classified into components, they are not redundantly shown in the drawings.

The main injection assembly 1 comprises a main material barrel 10, a main feeding hopper 11, a main screw 12, a main injection part 13 and a first pre-molding motor 14; the middle part of the main material cylinder 10 is provided with a first material storage chamber 100, and the front end of the main material cylinder 10 is provided with a nozzle 15 communicated with the first material storage chamber 100; the nozzle 15 is used to communicate with the mold to inject the molten plastic into the mold through the nozzle 15; the main screw 12 is movably arranged in the first storage chamber 100, and specifically, the main screw 12 can rotate and move back and forth in the first storage chamber 100; the main hopper 11 is arranged on the main material barrel 10, and the main hopper 11 is communicated with the first storage chamber 100, so that plastic particles can enter the first storage chamber 100 through the main hopper 11; the first pre-molding motor 14 is used for driving the main screw 12 to rotate; the main injection piece 13 is used to drive the main screw 12 to move. Specifically, the main injection member 13 is a double hydraulic cylinder, the primary color melt in the first storage chamber 100 is ejected from the nozzle 15 through double-cylinder balanced injection, and the double-cylinder balanced injection ensures that the primary color melt in the first storage chamber 100 has uniform flow rate and large injection power. The main injection assembly 1 has the functions of storing, injecting, maintaining pressure and the like. That is, the double cylinder has two piston rods that push the screws in parallel.

The actual working process of the main injection assembly 1 is: the main screw 12 is driven by a first pre-molding motor 14 to rotate; the plastic particles in the first storage chamber 100 are subjected to shearing and friction action of the main screw 12, and meanwhile, the plastic particles are also subjected to friction with the inner wall of the main material barrel 10, so that the plastic particles are molten into a liquid state under the generated heat and the heating action of the heater 60 on the outer ring of the main material barrel 10; as the volume of the molten plastic in the liquid state increases, the pressure in the first accumulator chamber 100 increases, and the main screw 12 retreats under the back pressure of the molten plastic to accommodate more molten plastic; when the main screw 12 retreats to a set position, the travel switch of the main injection piece 13 is triggered, the main injection piece 13 is started to move forward to drive the main screw 12 to move forward, and the main screw 12 does not rotate at the moment and only moves forward to realize the injection function of the main injection component 1; the pressure maintaining function is realized in such a way that the pressure inside the mold cavity is easy to be small along with the cooling shrinkage of the product, and in order to avoid the situation, the main injection piece 13 pushes the main screw 12 to move forwards, so that the pressure in the mold cavity is ensured not to be reduced, and the product in the mold is further compacted, so that the strength of the product is ensured.

The auxiliary injection assembly 2 comprises an auxiliary material barrel 20, an auxiliary material hopper 21, an auxiliary screw 22, an auxiliary injection part 23 and a second pre-molding motor 24; the middle part of the auxiliary charging barrel 20 is provided with a second storage chamber 200, and the auxiliary screw 22 is movably arranged in the second storage chamber 200; specifically, the auxiliary screw 22 can rotate and move back and forth in the second material storage chamber 200; the auxiliary hopper 21 is arranged on the auxiliary charging barrel 20, and the auxiliary hopper 21 is communicated with the second storage chamber 200, so that the plastic particles fed from the auxiliary hopper 21 can enter the second storage chamber 200; the second preplasticizing motor 24 is used for driving the auxiliary screw 22 to rotate; the secondary injection member 23 is used to drive the secondary screw 22 in motion. Preferably, the secondary injection member 23 is a single hydraulic cylinder, and the melt in the second accumulator 200 is precisely injected by a single cylinder and discharged into the first accumulator 100. The single-cylinder precise injection is adopted, so that the volume or the weight of the injected melt can be conveniently and precisely calculated, and unnecessary load of the hydraulic cylinder can be avoided. The secondary injection component 2 also has the functions of storing, injecting, maintaining pressure and the like.

The actual working process of the secondary injection assembly 2 is: adding plastic particles into the auxiliary hopper 21, enabling the plastic particles to enter the second storage chamber 200, and driving the auxiliary screw 22 to rotate by the second pre-molding motor 24; the plastic particles in the second storage chamber 200 are subjected to shearing and friction action of the auxiliary screw 22, meanwhile, the plastic particles are also subjected to friction with the inner wall of the auxiliary charging barrel 20 to generate heat, and a plurality of heaters 60 arranged on the outer ring of the auxiliary charging barrel 20 are additionally arranged to heat the plastic particles, so that the plastic particles in the second storage chamber 200 are gradually melted into a molten state; as the volume of the liquid plastic increases, the pressure in the second accumulator 200 increases, and the secondary screw 22 retreats in the second accumulator 200 under the back pressure of the liquid plastic to accommodate more liquid plastic; when the auxiliary screw 22 retreats to the preset position, the travel switch of the auxiliary injection member is triggered, the auxiliary injection member 23 is started to move forward, the auxiliary screw 22 is driven to move forward, the auxiliary screw 22 does not rotate at the moment, and the molten plastic in the second material storage chamber 200 is injected into the first material storage chamber 100 by the auxiliary screw 22.

Preferably, the primary material cartridge 10 and the secondary material cartridge 20 are communicated through the connecting member 3, so that the molten material in the second storage chamber 200 can be injected into the first storage chamber 100, and the purpose of co-injection of two different colors of plastics is achieved; and the connector 3 is provided with a one-way valve 30 for preventing the melt from flowing back from the first storage chamber 100 to the second storage chamber 200, wherein the one-way valve 30 adopted in the scheme is a ball-type one-way valve, and has simple structure and convenient use.

Wherein, the main screw 12 comprises a feeding section, a compression section and a metering section in sequence; the melt in the second accumulating chamber 200 can be injected into the metering section, i.e., the homogenizing section, of the main screw 12 in the first accumulating chamber 100 through the coupling 3, which is one end near the nozzle; the molten plastic in the metering section waits for the injection machine to perform an injection operation according to the metered amount.

Preferably, the injection device further comprises a support assembly 4, the support assembly 4 comprising: a main injection table front plate 40, a main injection table rear plate 41, a barrel guide rail 42, and a barrel support 43; the device comprises a front plate 44 of the auxiliary injection platform, a rear plate 45 of the auxiliary injection platform, a cushion block 46 and a supporting base 47. The machine barrel guide rail 42 is arranged below the main material barrel 10, and the machine barrel support 43 is arranged below the machine barrel guide rail 42 and supports the main material barrel 20, so that the front end of the main material barrel 10 is prevented from sagging and normal injection is prevented from being influenced; the main material barrel 10 is arranged on a main injection platform front plate 40, a main injection platform rear plate 41 is arranged in parallel with the injection platform front plate 40, and the first pre-molding motor 14 is arranged on the main injection platform rear plate 41. The auxiliary charging barrel 20 is arranged on the auxiliary injection platform front plate 44; the auxiliary shooting table front plate 44 is arranged on the main shooting table front plate 40 through a cushion block 46 and a support base 47 in sequence; in particular, the spacer 46 and the support base 47 are shaped like a boat stand. The sub-injection table rear plate 45 is provided behind the sub-injection table front plate 44, and the second pre-molding motor 24 and the sub-injection member 23 are both provided on the sub-injection table rear plate 45. The main injection component 1 and the auxiliary injection component 2 are connected into an integral structure, so that the rigidity is good and the reliability is high; and the auxiliary injection assembly 2 is obliquely arranged relative to the main injection assembly 1, so that the whole structure is compact and the occupied space is small.

Preferably, the injection device further comprises an translating assembly 5, the translating assembly 5 comprising: the device comprises a displacement oil cylinder 50, a connecting rod piece 51, a guide rod support 52, a guide rod 53 and a guide sliding block 54 which can slide along the guide rod 53; the connecting rod 51 is not limited to one part, and may be a combination of a plurality of parts; the displacement oil cylinder 50 is connected with the main injection platform front plate 40 through a connecting rod piece 51; the main injection platform front plate 40 and the main injection platform rear plate 41 are both arranged on a guide rod 53 through a guide sliding block 54, and the guide rod 53 is arranged on a guide rod support 52. Wherein the guide bar holder 52 is integrally formed, and the main injection unit 1 and the sub injection unit 2 integrally move on the same guide bar 53.

In the actual working process, after the mold is installed on an injection molding machine, closing and locking the mold; the whole injection device is pushed by the whole moving component 5 to approach to a front plate of the injection molding machine, so that a nozzle 15 of the main injection component 1 is aligned and attached to a sprue of a mold, molten plastic sprayed from the sprue can rapidly enter a product cavity of the mold, and a product is manufactured; the translating assembly 5 may also prevent the entire injection device from backing out.

Preferably, a plurality of heaters 60 are sleeved on both the outer ring of the main material cylinder 10 and the outer ring of the auxiliary material cylinder 20; the heaters 60 are arranged along the axial direction of the main barrel and the auxiliary barrel to heat the main barrel and the auxiliary barrel uniformly, so that melt in the main barrel 10 and the auxiliary barrel 20 is plasticized uniformly; both the main injection part 13 and the sub-injection part 23 include a stroke switch. The front plate 44 of the auxiliary injection platform is also provided with an adjusting pressing strip 61 and a corresponding adjusting screw, so that the auxiliary injection assembly 2 can be finely adjusted up and down, left and right; a clamping nut 62 and a coupling 63 are arranged between the main injection platform front plate 40 and the main injection platform rear plate 41; preferably, the secondary injection member 23 is in the secondary injection station back plate 45.

The following is a detailed description of the injection molding process of the present invention, taking the product with wood grain color as an example:

firstly, adding a main pigment into a main feeding hopper 11, and adding a wood grain pigment into an auxiliary feeding hopper 21; wherein, the added materials are all granular materials; accordingly, the main toner is introduced into the first hopper 100 through the main hopper 11, and the wood grain toner is introduced into the second hopper 200 through the sub hopper 21.

Then, the first preplasticizing motor 14 drives the main screw 12 to rotate so as to plasticize the main color material; and the heater 60 on the outer ring of the main material barrel 10 heats the main material barrel 10; the second preplasticizing motor 24 drives the auxiliary screw 22 to rotate so as to plasticize the wood grain pigment; and the heater 60 on the outer ring of the auxiliary charging barrel 20 heats the auxiliary charging barrel 20; the heating of the heater 60, and the rotation, shearing and friction of the main screw 12 and the auxiliary screw 22 make the main coloring material and the wood grain coloring material plastified uniformly.

Then, the main color material is plasticized into a molten state, the back pressure of the main screw 12 is increased along with the increase of the volume of the molten main color material, and the main screw 12 retreats; the wood grain pigment is plasticized to a molten state, and as the volume of the molten wood grain pigment increases, the back pressure of the auxiliary screw 22 increases, and the auxiliary screw 22 retreats. The positions of the travel switch of the main injection part 13 and the travel switch of the sub-injection part 23 are set in advance, and the volume of the melt can also be estimated based on the positions. And the auxiliary screw 22 reaches the predetermined position first to ensure that the main injection assembly performs the injection after the molten wood grain color is injected into the first storage chamber 100.

Then, when the sub-screw 22 retreats to the predetermined position, the travel switch of the sub-injection member 23 is triggered, and the sub-injection member 23 is further activated to push the sub-screw 22 to move forward, so as to inject the melted wood grain pigment into the first storage chamber 100 and the metering section of the main screw 12. The molten main colorant and the molten wood grain colorant are mixed in the first reservoir 100 in a metered section of the main screw 12, and the main screw 12 is retracted due to the increase in volume of the melt in the first reservoir 100.

Finally, when the main screw 12 is retracted to a set position, a travel switch of the main injection piece 13 is triggered, the main injection piece 13 is further started, the main injection piece 13 pushes the main screw 12 to move forward, the molten mixture is injected into the mold from the nozzle 15, and the product with the wood grain color is formed. The wood grain color product is closest to the natural wood grain texture.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An injection device of a wood grain machine, characterized by comprising:

2. The injection device of a wood grain machine as claimed in claim 1, wherein said main screw comprises a charging section, a compression section and a metering section in sequence; the molten material in the second storage chamber can be injected into the metering section of the main screw in the first storage chamber through the connecting piece.

3. The injection device of a wood-grain machine as claimed in claim 1 or 2, wherein said main injection member is a double hydraulic cylinder and said sub-injection member is a single hydraulic cylinder; and the melt in the first storage chamber is injected out from the nozzle through double-cylinder balanced injection, and the melt in the second storage chamber is discharged into the first storage chamber through single-cylinder precise injection.

4. The injection device of a wood grain machine as recited in claim 1, further comprising a support assembly, said support assembly comprising:

5. The injection device of a wood grain machine as recited in claim 4, further comprising a panning assembly, said panning assembly comprising: the whole moving oil cylinder, the connecting rod piece, the guide rod support, the guide rod and the guide sliding block can slide along the guide rod;

6. The injection device of a wood grain machine as set forth in claim 1, wherein said secondary injection assembly is arranged diagonally with respect to said primary injection assembly.

7. The injection device of a wood-grain machine as claimed in claim 1, wherein a plurality of heaters are sleeved on both the outer ring of the main barrel and the outer ring of the auxiliary barrel; the main injection part and the auxiliary injection part comprise travel switches.