WO2019136814A1

WO2019136814A1 - Environmentally friendly multi-color continuous and cyclic injection molding process and injection molding apparatus therefor

Info

Publication number: WO2019136814A1
Application number: PCT/CN2018/078066
Authority: WO
Inventors: 胡志勇; 陈华; 王亮
Original assignee: 东莞市潜鼎实业有限公司
Priority date: 2018-01-09
Filing date: 2018-03-06
Publication date: 2019-07-18
Also published as: CN110014546A

Abstract

An environmentally friendly multi-color continuous and cyclic injection molding process, comprising the following steps: injection-molding all color blocks sequentially according to the color order of a product, so as to produce the product. Further disclosed is an environmentally friendly multi-color continuous and cyclic injection molding apparatus, comprising: a rotating disc (101), the rotating disc being provided with several first molds (105) provided around the axis of the rotating disc; a driving gear set (102), engaging with the rotating disc; several second molds (106), located above the rotating disc, each second mold being connected to an injection molding device (104); a mold clamping assembly (103), connected to the second molds, and used for enabling the second molds to clamp to or open away from the first molds; and an electrical system (2), in signal connection with the driving gear set and the mold clamping assembly, and controlling the working states of the driving gear set and the mold clamping assembly. The environmentally friendly multi-color continuous and cyclic injection molding process and apparatus have a high degree of automation, and each injection molding station can independently perform the injection molding step of the station, reducing dependence on manpower, and improving production efficiency.

Description

Environmentally-friendly colorful continuous cycle injection molding process and injection molding equipment thereof

The invention relates to the technical field of injection molding processes, in particular to an environmentally-friendly and colorful continuous cycle injection molding process.

With the rapid development of modern society, people's living standards and aesthetics have greatly improved, so people's demand for and use of various beautiful and practical plastic products is increasing. At present, the surface color treatment of plastic products is generally sprayed, electroplated and anodized. These processes have a relatively large impact on environmental pollution. At the same time, these processes are inefficient and depend on frontline employees. And these processes are highly destructive to the environment. In the later period, society and the government need to make great efforts and a large amount of funds to manage. These processes cause irreversible damage to the physical and mental health of front-line employees in production, and cause heavy burdens on individuals, families and society. burden. Moreover, there are still many potential safety hazards in products produced and processed through processes such as fuel injection, electroplating and anodizing. Both the physical and mental health of consumers and the sustainable operation of enterprises will cause enormous harm and risks. .

An object of the present invention is to provide an environmentally-friendly and colorful continuous cycle injection molding process capable of producing colorful plastic products in an efficient and environmentally friendly manner.

To this end, the present invention provides an environmentally friendly and colorful continuous cycle injection molding process comprising the following steps:

According to the color sequence of the product, the injection of each color block is sequentially performed to produce a product.

As a preferred embodiment, the step of sequentially performing injection molding of each color block according to the color sequence of the product to produce the product includes the following steps:

Determine the color sequence of the product;

The product is divided into several color blocks according to the color sequence of the product.

As a preferred implementation manner, the color sequence is specifically:

The color sequence of the product is from inside to outside.

As a preferred embodiment, after the product is divided into several color blocks according to the color sequence of the product, the method further includes the following steps:

The injection molding color and injection molding shape of each injection molding process are sequentially set according to the color sequence of the product.

As a preferred embodiment, the step of: after sequentially setting the injection color and the injection molding shape of each injection molding process according to the color sequence of the product, the following steps are also included:

Close the mold and carry out the injection molding process;

Opening the mold, moving the first mold together with the product located in the first mold to a downstream injection molding station;

The mold is clamped again and the next color block is injection molded.

As a preferred implementation manner, the method further includes:

The mold clamping, mold opening, and re-closing are repeated until the injection molding of the outermost color block is completed.

As a preferred embodiment, the step of moving the first mold together with the product located in the first mold to the downstream injection molding station is specifically:

The injection molding stations are arranged in a circular shape, and then the positional transformation of the first mold is realized by rotating.

The invention also provides an environmentally-friendly colorful continuous cycle injection molding device, which comprises:

a turntable, the turntable is provided with a plurality of first molds arranged around the axis of the turntable;

a driving gear set that meshes with the turntable;

a plurality of second molds located above the turntable, each of the second molds being coupled to an injection molding apparatus;

a mold clamping combination, coupled to the second mold, for performing the mold clamping or mold opening process of the second mold and the first mold;

An electrical system is coupled to the driving gear set and the mold clamping combination signal to control an operating state of the driving gear set and the clamping combination.

As a preferred embodiment, the injection molding apparatus includes:

Hopper for storing rubber;

a feed combination coupled to the bottom of the hopper, the feed combination comprising an oil motor and a screw drive shaft coupled to the oil motor;

A tube set includes a feed screw coupled to the screw drive shaft.

As a preferred embodiment, the method further includes: a positioning combination, located below the turntable, and connected to the electrical system signal, the positioning combination comprising a positioning piston rod and a positioning cylinder sleeve slidingly connected with the positioning piston rod The positioning piston rod is for inserting and moving away from a positioning hole in the turntable.

As a preferred implementation manner, the clamping combination includes:

An upper template located above the turntable, the second mold being fixed to a bottom of the upper template;

a lower template located below the turntable;

a mold clamping cylinder located below the lower template;

The under-cylinder template is connected to the driving end of the clamping die cylinder, and the under-cylinder template is connected to the upper template through the pillar.

The invention has the beneficial effects of providing an environmentally-friendly and colorful continuous cycle injection molding process, which is relatively environmentally friendly by using a plurality of colored injection molding instead of the traditional injection, electroplating and anodizing processes for the production of colorful plastic products. The degree of automation is high, and each injection molding station can independently carry out the injection molding step of the station, which has less dependence on manpower and higher production efficiency.

The invention will now be described in further detail with reference to the drawings and embodiments.

figure 1

A schematic diagram of an environmentally friendly, colorful continuous cycle injection molding apparatus provided for the examples.

figure 2

A first perspective view of an environmentally friendly, colorful continuous cycle injection mold set provided by the examples (partial injection molding apparatus not shown).

image 3

A schematic cross-sectional view of an environmentally friendly and colorful continuous cycle injection mold set provided for the embodiment (some components are not shown).

Figure 4

A schematic of the drive gear set provided for the embodiment.

Figure 5

A schematic of the positioning combination provided for the embodiment.

Image 6

A second perspective view of the environmentally friendly colorful continuous cycle injection mold set provided by the examples.

Figure 7

A third perspective view of an environmentally friendly and colorful continuous cycle injection mold set provided by the embodiment.

Figure 8

A schematic of the thimble assembly provided for the examples.

Figure 9

A schematic of the water transport system provided for the examples.

Figure 10

A schematic cross-sectional view of the water transport system provided for the embodiment.

Figure 11

A method block diagram of the environmentally friendly colorful continuous cycle injection molding process provided for the second embodiment.

Figure 12

A schematic representation of a plastic article provided for the examples.

In order to more clearly illustrate the invention, the invention is further described below in conjunction with the drawings.

Embodiment 1

As shown in FIG. 1 to FIG. 10, the embodiment provides an environmentally-friendly and colorful continuous cycle injection molding apparatus, including an environmentally-friendly and colorful continuous cycle injection mold set 1 and an electrical system 2. The environmentally-friendly colorful continuous cycle injection mold set 1 comprises: a turntable 101, the turntable 101 is provided with a plurality of first molds 105 arranged around the axis of the turntable 101; the drive gear set 102 is engaged with the turntable 101; a die 106, located above the turntable 101, each of the second molds 106 is coupled to an injection molding apparatus 104; a mold clamping assembly 103 coupled to the second mold 106 for use in the second mold 106 The mold clamping or mold opening process is performed with the first mold 105. The electrical system 2 is signally coupled to the drive gear set 102 and the mold clamping assembly 103, respectively, to control the operational state of the drive gear set 102 and the mold clamping assembly 103. The driving gear set 102 drives the turntable 101 to rotate about the axis of the turntable 101 itself under the control of the electrical system 2. Since the first die 105 is fixed on the turntable 101, the first die 105 also rotates as the turntable 101 rotates, thereby A positional shift between the first dies 105 is achieved. Each of the second molds 106 represents an injection molding station, and the different second molds 106 are responsible for different color injection molding processes after being clamped with the first molds 105.

In the present embodiment, the driving gear set 102 includes a driving gear 1021, a driving gear base 1022, a driving gear pressing block 1023, a reduction motor 1024, and a servo motor 1025. The electric system 2 can control the rotation speeds of the servo motor 1025 and the reduction motor 1024.

In the present embodiment, the injection molding apparatus 104 includes a hopper 1041, a feed combination 1042, an injection assembly 1043, a tube set 1044, and a seat cylinder combination 1045. The hopper 1041 is used to store the rubber compound. The charging combination 1042 is coupled to the bottom of the hopper 1041. The charging assembly 1042 includes an oil motor 10421, a motor fixing plate 10422, a screw drive shaft 10423, a motor bearing housing 10424, and a screw fixing ring 10425. The oil motor 10421 passes through the screw driving shaft 10423. The feed screw 10442 is driven to rotate to cause the plasticized compound to flow to the tube set 1044. The injection assembly 1043 includes a cylinder upper cover 10431, a cylinder liner 10432, a cylinder piston rod 10433, and a cylinder lower cover 10434. The injection assembly 1043 can provide power for molding the rubber compound in the mold. The tube set 1044 includes a material tube 10441, a feed screw 10442 and a nozzle 10443. The material tube 10441 is disposed coaxially with the feed screw 10442; the nozzle 10443 is connected to the outlet of the material tube 10441. The cylinder combination 1045 is coupled to the injection assembly 1043 for driving the tube set 1044 to be close to or away from the second mold 106. The seat cylinder assembly 1045 includes a seat cylinder piston rod 10451, a cylinder bore cover 10452, and a seat cylinder. The cylinder liner 10453, the cylinder rod 10454 and the cylinder end cap 10455; the cylinder combination 1045 can provide better contact between the nozzle 10443 and the second mold 106.

In this embodiment, the mold clamping assembly 103 includes an upper die plate 10301, a machine column 10302, a mold clamping cylinder oil suction pipe 10303, a wear pad 10304, a lower die plate 10305, a mold cavity end cap 10306, and a mold cavity cylinder liner 10307. The quick-moving piston rod 10308, the clamping mold cylinder cover 10309, the mold clamping cylinder piston 10310, the haval ring 10311, the cylinder under template 10312, the column nut 10313 and the machine column cap 10314. The upper die plate 10301 is located above the turntable 101, the second die 106 is fixed to the bottom of the upper die plate 10301, the lower die plate 10305 is located below the turntable 101, and the die clamping die cylinder is located below the lower die plate 10305. The under-cylinder template 10312 is coupled to the driving end of the clamping die cylinder, and the under-cylinder template 10312 is coupled to the upper die plate 10301 via the chassis 10302. When the clamping cylinder piston 10310 moves downward, the cylinder lower template 10312, the cylinder 10302 and the upper template 10301 are sequentially driven downward, thereby completing the clamping operation of the first mold 105 and the second mold 106; When the cylinder piston 10310 moves upward, the cylinder lower template 10312, the column 10302 and the upper die plate 10301 are sequentially moved upward, thereby completing the mold opening operation of the first die 105 and the second die 106.

In the embodiment, the environmental protection colorful continuous cycle injection molding equipment may select a hydraulic system 6, and the hydraulic system 6 includes a fuel tank 601, a motor 602, an oil pump 603, and an oil passage plate 604. Of course, a pneumatic system is also available.

In the present embodiment, the environmentally-friendly colorful continuous cycle injection mold set 1 further includes a positioning assembly 107. The positioning assembly 107 is located below the turntable 101 and is connected to the electrical system 2, and the positioning assembly 107 includes a positioning piston rod 1071, a positioning guide sleeve 1072, a positioning fixing plate 1073, a positioning upper cover 1074, a positioning rod 1075, The positioning cylinder sleeve 1076 and the positioning lower cover 1077 are slidably coupled to the positioning cylinder sleeve 1076 for inserting and moving away from the positioning hole 1011 in the turntable 101. Specifically, when the turntable 101 is rotated to a predetermined injection molding station, the positioning piston rod 1071 is inserted into the positioning hole 1011, which can prevent the rotation of the turntable 101, further ensuring the reliability of the mold clamping process.

In the present embodiment, the environmentally-friendly colorful continuous-cycle injection mold set 1 further includes a thimble assembly 108. The thimble assembly 108 is located below the first mold 105. When all the injection molding stations are injection molded, the mold is opened, and then the thimble combination 108 can be The product in the first die 105 is jacked up to disengage the product from the first die 105. The thimble assembly 108 includes a thimble piston rod 1081, a thimble fixing plate 1082, a thimble upper cover 1083, a thimble cylinder liner 1084, a thimble pull rod 1085, and a thimble lower cover 1086.

In this embodiment, the first die 105 is a male die, and the second die 106 is a master die; or the first die 105 is a master die, and the first die 105 is a male die.

In this embodiment, the number of the second modes 106 may be 1, 2, 3, 4, 5, 6, or even more; the number of the first modes 105 may be equal to the second mode 106, or One, two, three, four or more more than the second mode 106.

In the embodiment, the environmentally-friendly and colorful continuous cycle injection molding equipment further comprises a worktable plate 3, a frame 4 and a footboard 5, and the environmentally-friendly and colorful continuous cycle injection mold group 1 and the work table plate 3 are all mounted on the frame 4, and the operation is performed. Personnel can walk to the workbench through the foot pedal 5 to operate. Preferably, the position of the footboard 5 is set without the injection molding station to facilitate the operation space for the operator.

In the present embodiment, the environmentally-friendly colorful continuous-cycle injection mold set 1 further includes a water transport system 109 including a water transport center shaft 1091, a water transport cover 1092, a water transport sleeve 1093, and a water transport cover 1094. The water transport center shaft 1091 is connected to the water bearing 1096 through a seal 1095. The side of the water transport center shaft 1091 is provided with a mold water inlet 1097 and a mold water return port 1098 which are in communication with the mold. The water transport center shaft 1091 is fixed to the lower die plate 10305, and the water transport cover 1092, the water transfer cover 1093, and the underwater cover 1094 rotate with the turntable 101.

In the present embodiment, the electrical system 2 includes an electrical box 201 and a controller operating box 202. Preferably, each injection molding device 104 of each station can be equipped with a separate electrical system 2, or all of the injection molding devices 104 can be connected to an electrical system 2 for centralized control.

The environmentally-friendly and colorful continuous-cycle injection molding equipment provided by the embodiment adopts multiple color-injection injection molding instead of the traditional injection, electroplating and anodizing processes to produce colorful plastic products, which is relatively environmentally friendly and highly automated, each The injection molding station can independently carry out the injection molding step of the station, which has less dependence on manpower and higher production efficiency.

Embodiment 2

As shown in FIG. 11 , the embodiment provides an environmentally-friendly and colorful continuous cycle injection molding process that can be realized by the environmentally-friendly and colorful continuous cycle injection molding apparatus of the first embodiment, and mainly includes the following steps:

S10: The injection molding of each color block is sequentially performed according to the color sequence of the product to produce a product. Among them, S10 includes:

S101: Determine the color sequence of the product. The color order of the product from inside and outside is the color sequence of the product.

S102: Divide the product into several color blocks according to the color sequence of the product. The parts that can be produced in the same injection molding process are one color block.

S103: The injection color and the injection molding shape of each injection molding process are sequentially set according to the color blocks of the product in the order of the inside and the outside.

S104: clamping the mold, performing an injection molding process; opening the mold, moving the first mold 105 together with the product located in the first mold 105 to a downstream injection molding station; and clamping again, performing injection molding of the next color block. Preferably, each of the injection molding stations can be arranged in a circular shape as in the injection molding station in the first embodiment, and then the positional transformation of the first mold 105 can be realized by rotating; of course, each injection molding station can also be colored according to the color. The position conversion of the first die 105 is realized by using a device such as a conveyor belt in a straight line.

S105: S103 is repeatedly executed until the injection molding of the outermost color block is completed.

S20: Finish the last round of injection molding, and take out the product after opening the mold.

Hereinafter, the combination of the first embodiment and the second embodiment will be described by using a specific example. The steps of producing the plastic product 7 shown in FIG. 12 using the environmentally-friendly and colorful continuous cycle injection molding apparatus of the first embodiment are as follows:

First, the color sequence of the plastic article 7 is determined by analysis. As shown in FIG. 12, the plastic article 7 includes a first member 701, a second member 702, a third member 703, a fourth member 704, and a fifth member 705.

If the first component 701 is red, the second component 702 is orange, the third component 703 is yellow, the fourth component 704 is green, and the fifth component 705 is blue. The color sequence of the plastic product 7 may be red-orange-yellow-green-blue, red-orange-yellow-blue-green, red-yellow-orange-green-blue, or red-yellow - Orange - Blue - Green, etc. Since the colors of the components are different, no two components can be processed in one injection molding, so the first component 701 is the first color patch, the second component 702 is the second color patch, and the third component 703 is the third color patch. The fourth component 704 is a fourth color block and the fifth component 705 is a fifth color block. According to the positional relationship of the color blocks, assuming that the set color sequence is red-orange-yellow-green-blue, the injection molding device 104 of the first injection molding station in the first embodiment is loaded with red rubber particles, and the second injection molding station is used. The injection molding device 104 is filled with orange rubber particles, the injection molding device 104 of the third injection molding station is filled with yellow rubber particles, the injection molding device 104 of the fourth injection molding station is filled with green rubber particles, and the injection molding device 104 of the fifth injection molding station is filled with blue rubber particles. grain. After the first injection molding station injects the first component 701, the second die 106 of the first station is separated from the first die 105, the electrical system 2 sends a signal, the driving gear set 102 operates, and the turntable 101 drives the first die 105 and The first member 701 rotates. When the inductive switch senses that the first die 105 is rotated to the second injection molding station, the driving gear set 102 stops working, the positioning assembly 107 starts to work, and the positioning piston rod 1071 is inserted into the positioning hole 1011. Then the hydraulic system 6 starts to work, the clamping assembly 103 of the second injection molding station drives the second mold 106 of the second station to move downward and clamps with the first mold 105 equipped with the first member 701, and the cylinder combination 1045 The tube set 1044 is also moved downward, after the nozzle 10443 is connected to the second mold 106, the second part 702 is injection molded on the basis of the first mold 105, and so on, until the injection molding of the fifth part 705 is completed, and the mold clamping is completed. The combination 103 drives the second die 106 upward, and then the thimble assembly 108 lifts the plastic article 7 and takes out the plastic article 7 to complete the entire process.

If the first component 701 is red, the second component 702 and the third component 703 are orange, the fourth component 704 and the fifth component 705 are green. The color sequence of the plastic product 7 is red-orange-green. Then the first component 701 is the first color patch, the second component 702 and the third component 703 are the second color patches, and the fourth component 704 and the fifth component 705 are the third color patches. The first injection molding station is responsible for the injection molding of the first component 701, the second injection molding station is responsible for the injection molding of the second component 702 and the third component 703, and the third injection molding station is responsible for the injection molding of the fourth component 704 and the fifth component 705.

If the first component 701 is red, the second component 702 and the fourth component 704 are orange, and the third component 703 and the fifth component 705 are green. The color sequence of the plastic product 7 is red-orange-green or red-green-orange. Then the first component 701 is the first color patch, the second component 702 and the fourth component 704 are the second color patches, and the third component 703 and the fifth component 705 are the third color patches. When red-orange-green is selected as the production color sequence, the first injection molding station is responsible for the injection molding of the first component 701, and the second injection molding station is responsible for the injection molding of the second component 702 and the fourth component 704, the third injection molding machine. The bit is responsible for the injection molding of the third part 703 and the fifth part 705.

The terms "first", "second", etc. in this document are merely used to distinguish between descriptions and have no special meaning.

In addition, it should be noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention has various possibilities. The combination method will not be described separately.

In addition, any combination of various embodiments of the invention may be made as long as it does not deviate from the idea of the invention, and it should be regarded as the disclosure of the invention.

The invention adopts multiple color injection molding instead of the traditional injection, electroplating and anodizing processes to produce colorful plastic products with high degree of automation. Each injection molding station can automatically inject according to the injection molding step, and relies on manpower. It is small, high in production efficiency, and it can be mass-produced industrially, which can be easily copied and used, and has high industrial applicability.

Claims

An environmentally-friendly and colorful continuous cycle injection molding process, characterized in that the injection of each color block is sequentially performed according to the color sequence of the product to produce a product, including the following steps:
Determine the color sequence of the product;
The product is divided into several color blocks according to the color sequence of the product.
The environmentally-friendly colorful continuous cycle injection molding process according to claim 1, wherein the color sequence is specifically: a color sequence of the product from inside and outside.
The environmentally-friendly colorful continuous cycle injection molding process according to claim 1, wherein the step of: after dividing the product into a plurality of color blocks according to the color sequence of the product, further comprising the steps of: sequentially setting each injection molding according to the color sequence of the product; Injection molding color and injection molding shape of the process.
The environmentally-friendly colorful continuous cycle injection molding process according to claim 3, wherein the step of: after sequentially setting the injection color and the injection molding shape of each injection molding process according to the color sequence of the product, the following steps are further included:
Close the mold and carry out the injection molding process;
Opening the mold, moving the first mold together with the product located in the first mold to a downstream injection molding station;
The mold is clamped again and the next color block is injection molded.
The environmentally-friendly and colorful continuous cycle injection molding process according to claim 4, further comprising: repeating clamping, mold opening, and re-molding until the injection molding of the outermost color block is completed.
The environmentally-friendly colorful continuous cycle injection molding process according to claim 4, wherein the step of: moving the first mold together with the product located in the first mold to a downstream injection molding station is specifically: causing each injection molding station to follow The circular arrangement is arranged, and then the positional transformation of the first mode is achieved by means of rotation.
An environmentally-friendly and colorful continuous cycle injection molding apparatus, characterized in that it comprises:
a turntable, the turntable is provided with a plurality of first molds arranged around the axis of the turntable;
a driving gear set that meshes with the turntable;
a plurality of second molds located above the turntable, each of the second molds being coupled to an injection molding apparatus;
a mold clamping combination, coupled to the second mold, for performing the mold clamping or mold opening process of the second mold and the first mold;
An electrical system is coupled to the driving gear set and the mold clamping combination signal to control an operating state of the driving gear set and the clamping combination.
The environmentally-friendly and colorful continuous cycle injection molding apparatus according to claim 7, wherein the injection molding apparatus comprises:
Hopper for storing rubber;
a feed combination coupled to the bottom of the hopper, the feed combination comprising an oil motor and a screw drive shaft coupled to the oil motor;
A tube set includes a feed screw coupled to the screw drive shaft.
The environmentally-friendly colorful continuous cycle injection molding apparatus according to claim 7, further comprising: a positioning combination located below the turntable and connected to the electrical system signal, the positioning combination comprising positioning a piston rod and a seat A positioning cylinder sleeve that is slidably coupled to the piston rod is disposed, and the positioning piston rod is used to insert and displace the positioning hole in the turntable.
The environmentally-friendly colorful continuous cycle injection molding apparatus according to claim 7, wherein the mold clamping combination comprises:
An upper template located above the turntable, the second mold being fixed to a bottom of the upper template;
a lower template located below the turntable;
a mold clamping cylinder located below the lower template;
The under-cylinder template is connected to the driving end of the clamping die cylinder, and the under-cylinder template is connected to the upper template through the pillar.