CN113954294A - Thick-wall lens multi-layer monochromatic injection mold and molding method - Google Patents
Thick-wall lens multi-layer monochromatic injection mold and molding method Download PDFInfo
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- CN113954294A CN113954294A CN202111225486.5A CN202111225486A CN113954294A CN 113954294 A CN113954294 A CN 113954294A CN 202111225486 A CN202111225486 A CN 202111225486A CN 113954294 A CN113954294 A CN 113954294A
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- 238000000465 moulding Methods 0.000 title claims abstract description 163
- 238000002347 injection Methods 0.000 title claims abstract description 45
- 239000007924 injection Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000001746 injection moulding Methods 0.000 claims abstract description 154
- 239000002994 raw material Substances 0.000 claims abstract description 47
- 239000004033 plastic Substances 0.000 claims abstract description 9
- 229920003023 plastic Polymers 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims description 18
- 238000012546 transfer Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 2
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 143
- 238000007493 shaping process Methods 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 12
- 238000007792 addition Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000012797 qualification Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14008—Inserting articles into the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
- B29C45/162—The materials being injected at different moulding stations using means, e.g. mould parts, for transferring an injected part between moulding stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
- B29C45/162—The materials being injected at different moulding stations using means, e.g. mould parts, for transferring an injected part between moulding stations
- B29C2045/1621—The materials being injected at different moulding stations using means, e.g. mould parts, for transferring an injected part between moulding stations the transfer means operating independently from the injection mould cavity, i.e. during injection the transfer means are completely outside the mould cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of material conveying devices, and particularly relates to a thick-wall lens multilayer single-color injection mold and a forming method. The invention provides a thick-wall lens multilayer single-color injection mold and a molding method thereof, aiming at the problems of long molding time and low yield caused by decomposition of injection molding raw materials due to overlong retention time in a runner and a molding cavity in the prior art. The invention realizes the manufacture of multilayer plastic products by carrying out multiple times of injection molding in different molding cavities, thereby improving the production efficiency and the product percent of pass.
Description
Technical Field
The invention belongs to the technical field of material conveying devices, and particularly relates to a thick-wall lens multilayer single-color injection mold and a forming method.
Background
Injection molding, also known as injection molding, is a method of molding by injection and molding. The injection molding method has the advantages of high production speed, high efficiency, automation of operation, various colors, various shapes from simple to complex, small sizes, accurate product size, easy replacement of products, capability of forming products with complex shapes, and suitability for the molding processing fields of mass production, products with complex shapes and the like. In the prior art, multiple layers of plastic parts are mostly subjected to multiple times of injection molding through a single-color single-layer forming die, so that the forming time is long, and injection molding raw materials stay for too long in a runner and a forming cavity to be decomposed, so that the yield is low.
For example, the chinese invention patent application discloses a multi-shot injection molding die and a molding method thereof [ application No.: 201610687608.5], the invention comprises an upper die and a lower die, a plurality of cavities for product injection molding are arranged between the upper die and the lower die, injection heads matched with the cavities and used for injection molding into the cavities are fixedly arranged in the upper die, and the invention also comprises electromagnetic valves which are fixedly arranged in the upper die and can realize selective opening and closing of the injection heads.
The invention has the advantages of low production cost and wide application prospect, and can be obtained by modifying the existing injection mold, but the invention still does not solve the problems.
Disclosure of Invention
The invention aims to solve the problems and provides a thick-wall lens multilayer monochromatic injection mold.
Another object of the present invention is to provide a molding method using a thick-walled lens multi-layer single-color injection mold, which addresses the above problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a monochromatic injection mold of thick wall lens multilayer, includes the fixed die plate and sets up the shaping cavity on the fixed die plate, every shaping cavity all is linked together with a runner of moulding plastics, the shaping cavity is equipped with at least two and arranges into at least one row in proper order, and the volume of the shaping cavity of arranging is by one end grow gradually to the other end.
In foretell monochromatic injection mold of thick wall lens multilayer, the shaping cavity is equipped with threely, including first shaping cavity, second shaping cavity and third shaping cavity, and first shaping cavity, second shaping cavity and third shaping cavity are arranged into one row in proper order, second shaping cavity is located between first shaping cavity and the third shaping cavity, and the volume of first shaping cavity is less than the volume of second shaping cavity, and the volume of third shaping cavity is greater than the volume of second shaping cavity.
In the thick-walled lens multi-layer single-color injection mold, the distance between the first molding chamber and the second molding chamber is equal to the distance between the third molding chamber and the second molding chamber.
In the thick-wall lens multilayer single-color injection mold, the fixed mold insert is movably connected in the fixed mold plate, and the fixed mold plate is arranged on the fixed mold insert.
The molding method by using the thick-wall lens multilayer monochromatic injection mold comprises the following steps:
inner layer injection molding: injecting a molten injection molding raw material into the first molding cavity chamber, and solidifying to obtain an intermediate with an inner layer;
a middle layer injection molding step: transferring the inner layer into a second molding cavity through a manipulator, attaching the injection molding raw material in a molten state in the second molding cavity to the inner layer, and cooling to obtain an intermediate with a middle layer;
outer layer injection molding: and transferring the middle layer into a third molding cavity chamber through a manipulator, attaching the injection molding raw material in a molten state in the third molding cavity chamber to the middle layer, and cooling to obtain an outer layer, thereby obtaining a finished product.
In the molding method, the inner layer injection molding step, the middle layer injection molding step and the outer layer injection molding step of different finished products are nested.
In the molding method, the movement track of the manipulator in the transfer process is divided into three steps of lifting, moving and placing.
In the molding method, the motion tracks of two adjacent steps of the manipulator are perpendicular to each other, and the moving distance of the moving motion is equal to the distance between the first molding cavity and the second molding cavity.
In the above molding method, in the middle layer injection molding step and the outer layer injection molding step, before the intermediate body is placed into the second molding chamber or the third molding chamber by the manipulator, a step of injecting a part of injection molding raw material in a molten state required in this step is further included.
In the above molding method, the amount of the injection molding raw material injected in a molten state in advance is one third to one half of the total amount of the injection molding in this step.
Compared with the prior art, the invention has the advantages that:
the invention realizes the manufacture of multilayer plastic products by carrying out multiple times of injection molding in different molding cavities, thereby improving the production efficiency and the product percent of pass.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the operation of the present invention;
in the figure: the mould comprises a fixed mould plate 1, a forming cavity 2, a fixed mould insert 3, a manipulator 4, a first forming cavity 21, a second forming cavity 22, a third forming cavity 23, an inner layer 100, a middle layer 200 and an outer layer 300.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1
The embodiment provides a single color injection mold of thick wall lens multilayer, combines fig. 1 and fig. 2 to show, including fixed die plate 1 and the shaping cavity 2 of setting on fixed die plate 1, every shaping cavity 2 all is linked together with a runner of moulding plastics, and each runner of moulding plastics can be single like this carries out the raw materials of moulding plastics or the injection moulding of colour, shaping cavity 2 is equipped with at least two and arranges into at least one row in proper order, and the shaping cavity 2's of one row volume is crescent to the other end by one end. The invention realizes the manufacture of multilayer plastic products by carrying out multiple times of injection molding in different molding cavities 2, and improves the production efficiency and the product percent of pass.
Specifically, the number of the molding chambers 2 is three, and the molding chambers include a first molding chamber 21, a second molding chamber 22 and a third molding chamber 23, the first molding chamber 21, the second molding chamber 22 and the third molding chamber 23 are sequentially arranged in a row, the second molding chamber 22 is located between the first molding chamber 21 and the third molding chamber 23, the volume of the first molding chamber 21 is smaller than that of the second molding chamber 22, and the volume of the third molding chamber 23 is larger than that of the second molding chamber 22.
As shown in fig. 2, the distance between the first molding chamber 21 and the second molding chamber 22 is equal to the distance between the third molding chamber 23 and the second molding chamber 22. In this way, after each movement of the manipulator 4, the intermediate body in the first molding cavity chamber 21 enters the second molding cavity chamber 22, and simultaneously, the intermediate body in the second molding cavity chamber 22 can enter the third molding cavity chamber 23, so that the manufacturing steps of a plurality of products can be performed in a nested manner.
As shown in fig. 1, the fixed die plate further comprises a fixed die insert 3 movably connected in the fixed die plate 1, and the fixed die plate 1 is arranged on the fixed die insert 3. Is convenient to disassemble, assemble and replace, and meets the requirements of different injection products.
Example 2
The present example provides a molding method using the thick-walled lens multilayer monochromatic injection mold described in example 1, comprising the steps of:
inner layer injection molding: injecting a molten injection molding raw material into the first molding cavity chamber 21, and solidifying to obtain an intermediate body with an inner layer 100;
a middle layer injection molding step: transferring the inner layer 100 into the second molding cavity 22 through the manipulator 4, wherein the movement track of the transfer process of the manipulator 4 is divided into three steps of lifting, moving and placing, the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the moving distance of the moving movement is equal to the distance between the first molding cavity 21 and the second molding cavity 22, namely A, B and C shown in figure 2 are carried out, the injection molding raw material in a molten state in the second molding cavity 22 is attached to the inner layer 100, and an intermediate body with the middle layer 200 is obtained after cooling;
outer layer injection molding: transferring the middle layer 200 into the third forming chamber 23 through the manipulator 4, wherein the movement track of the transfer process of the manipulator 4 is divided into three steps of lifting, moving and placing, the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the moving distance of the moving movement is equal to the distance between the second forming cavity chamber 22 and the third forming cavity chamber 23, namely A, B and C shown in fig. 2 are carried out, the injection molding raw material in a molten state in the third forming cavity chamber 23 is attached to the middle layer 200, the outer layer 300 is obtained after cooling, so that a finished product is prepared, and the manipulator 4 takes out the product through two actions D and E shown in fig. 2.
The inner layer injection molding step, the middle layer injection molding step and the outer layer injection molding step of different finished products are nested, namely, the first product is subjected to the outer layer injection molding step, the second product is subjected to the inner layer injection molding step, and the third product is subjected to the inner layer injection molding step.
Example 3
The present example provides a molding method using the thick-walled lens multilayer monochromatic injection mold described in example 1, comprising the steps of:
inner layer injection molding: injecting a molten injection molding raw material into the first molding cavity chamber 21, and solidifying to obtain an intermediate body with an inner layer 100;
a middle layer injection molding step: injecting part of injection molding raw materials in a molten state into the second molding cavity chamber 22 in the middle injection molding step in advance, wherein the injection amount is one third of the total injection molding amount of the middle injection molding step, transferring the inner layer 100 into the second molding cavity chamber 22 through the manipulator 4, dividing the movement track of the transfer process of the manipulator 4 into three steps of lifting, moving and placing, wherein the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the movement distance of the movement action is equal to the distance between the first molding cavity chamber 21 and the second molding cavity chamber 22, namely A, B and C shown in figure 2 are carried out, the injection molding raw materials in the molten state in the second molding cavity chamber 22 are attached to the inner layer 100, and an intermediate body with a middle layer 200 is obtained after cooling;
outer layer injection molding: injecting a part of injection molding raw materials in a molten state into the third molding cavity chamber 23 in the outer layer injection molding step in advance, wherein the injection amount is one third of the total injection amount of the outer layer injection molding step, transferring the middle layer 200 into the third molding cavity chamber 23 through the manipulator 4, wherein the movement track of the transfer process of the manipulator 4 is divided into three steps of lifting, moving and placing, the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the movement distance of the movement action is equal to the distance between the second molding cavity chamber 22 and the third molding cavity chamber 23, namely A, B and C shown in figure 2 are carried out, the injection molding raw materials in the molten state in the third molding cavity chamber 23 are attached to the middle layer 200, and the outer layer 300 is obtained after cooling, so that a finished product is obtained, and the manipulator 4 takes out the product through two actions D and E shown in figure 2.
The inner layer injection molding step, the middle layer injection molding step and the outer layer injection molding step of different finished products are nested, namely, the first product is subjected to the outer layer injection molding step, the second product is subjected to the inner layer injection molding step, and the third product is subjected to the inner layer injection molding step.
Example 4
The present example provides a molding method using the thick-walled lens multilayer monochromatic injection mold described in example 1, comprising the steps of:
inner layer injection molding: injecting a molten injection molding raw material into the first molding cavity chamber 21, and solidifying to obtain an intermediate body with an inner layer 100;
a middle layer injection molding step: injecting part of injection molding raw materials in a molten state into the second molding cavity chamber 22 in the middle injection molding step in advance, wherein the injection amount is one half of the total injection molding amount of the middle injection molding step, transferring the inner layer 100 into the second molding cavity chamber 22 through the manipulator 4, dividing the movement track of the transfer process of the manipulator 4 into three steps of lifting, moving and placing, wherein the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the movement distance of the movement action is equal to the distance between the first molding cavity chamber 21 and the second molding cavity chamber 22, namely A, B and C shown in figure 2 are carried out, the injection molding raw materials in the molten state in the second molding cavity chamber 22 are attached to the inner layer 100, and an intermediate body with a middle layer 200 is obtained after cooling;
outer layer injection molding: injecting a part of injection molding raw materials in a molten state into the third molding cavity chamber 23 in the outer layer injection molding step in advance, wherein the injection amount is one half of the total injection amount of the outer layer injection molding step, transferring the middle layer 200 into the third molding cavity chamber 23 through the manipulator 4, wherein the movement track of the transfer process of the manipulator 4 is divided into three steps of lifting, moving and placing, the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the movement distance of the movement action is equal to the distance between the second molding cavity chamber 22 and the third molding cavity chamber 23, namely A, B and C shown in figure 2 are carried out, the injection molding raw materials in the molten state in the third molding cavity chamber 23 are attached to the middle layer 200, and the outer layer 300 is obtained after cooling, so that a finished product is obtained, and the manipulator 4 takes out the product through two actions D and E shown in figure 2.
The inner layer injection molding step, the middle layer injection molding step and the outer layer injection molding step of different finished products are nested, namely, the first product is subjected to the outer layer injection molding step, the second product is subjected to the inner layer injection molding step, and the third product is subjected to the inner layer injection molding step.
Example 5
The present example provides a molding method using the thick-walled lens multilayer monochromatic injection mold described in example 1, comprising the steps of:
inner layer injection molding: injecting a molten injection molding raw material into the first molding cavity chamber 21, and solidifying to obtain an intermediate body with an inner layer 100;
a middle layer injection molding step: injecting injection molding raw materials in a molten state into the second molding cavity chamber 22 in a part of middle layer injection molding step in advance, wherein the injection amount is 45% of the total injection molding amount of the middle layer injection molding step, transferring the inner layer 100 into the second molding cavity chamber 22 through the manipulator 4, dividing the movement track of the transfer process of the manipulator 4 into three steps of lifting, moving and placing, wherein the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the movement distance of the movement action is equal to the distance between the first molding cavity chamber 21 and the second molding cavity chamber 22, namely A, B and C shown in figure 2 are carried out, the injection molding raw materials in the molten state in the second molding cavity chamber 22 are attached to the inner layer 100, and an intermediate body with a middle layer 200 is obtained after cooling;
outer layer injection molding: injecting part of injection molding raw materials in a molten state into the third molding cavity chamber 23 in the outer layer injection molding step in advance, wherein the injection amount is 45% of the total injection amount of the outer layer injection molding step, transferring the middle layer 200 into the third molding cavity chamber 23 through the manipulator 4, wherein the movement track of the transfer process of the manipulator 4 is divided into three steps of lifting, moving and placing, the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the movement distance of the movement action is equal to the distance between the second molding cavity chamber 22 and the third molding cavity chamber 23, namely A, B and C shown in figure 2 are carried out, the injection molding raw materials in the molten state in the third molding cavity chamber 23 are attached to the middle layer 200, the outer layer 300 is obtained after cooling, and then the finished product is obtained through two actions D and E shown in figure 2 by the manipulator 4.
The inner layer injection molding step, the middle layer injection molding step and the outer layer injection molding step of different finished products are nested, namely, the first product is subjected to the outer layer injection molding step, the second product is subjected to the inner layer injection molding step, and the third product is subjected to the inner layer injection molding step.
Comparative example 1
This comparative example provides a molding method using the multilayer single color injection mold for thick-walled lenses described in example 1, comprising the steps of:
inner layer injection molding: injecting a molten injection molding raw material into the first molding cavity chamber 21, and solidifying to obtain an intermediate body with an inner layer 100;
a middle layer injection molding step: injecting injection molding raw materials in a molten state into a second molding cavity chamber 22 in a part of middle layer injection molding step in advance, wherein the injection amount is 20% of the total injection amount of the middle layer injection molding step, transferring the inner layer 100 into the second molding cavity chamber 22 through a manipulator 4, dividing the movement track of the transfer process of the manipulator 4 into three steps of lifting, moving and placing, wherein the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the movement distance of the movement action is equal to the distance between a first molding cavity 21 and the second molding cavity chamber 22, namely A, B and C shown in figure 2 are carried out, the injection molding raw materials in the molten state in the second molding cavity chamber 22 are attached to the inner layer 100, and an intermediate body with a middle layer 200 is obtained after cooling;
outer layer injection molding: injecting part of injection molding raw materials in a molten state into the third molding cavity chamber 23 in the outer layer injection molding step in advance, wherein the injection amount is 20% of the total injection amount of the outer layer injection molding step, transferring the middle layer 200 into the third molding cavity chamber 23 through the manipulator 4, wherein the movement track of the transfer process of the manipulator 4 is divided into three steps of lifting, moving and placing, the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the movement distance of the movement action is equal to the distance between the second molding cavity chamber 22 and the third molding cavity chamber 23, namely A, B and C shown in figure 2 are carried out, the injection molding raw materials in the molten state in the third molding cavity chamber 23 are attached to the middle layer 200, the outer layer 300 is obtained after cooling, and then the finished product is obtained through two actions D and E shown in figure 2 by the manipulator 4.
The inner layer injection molding step, the middle layer injection molding step and the outer layer injection molding step of different finished products are nested, namely, the first product is subjected to the outer layer injection molding step, the second product is subjected to the inner layer injection molding step, and the third product is subjected to the inner layer injection molding step.
Comparative example 2
This comparative example provides a molding method using the multilayer single color injection mold for thick-walled lenses described in example 1, comprising the steps of:
inner layer injection molding: injecting a molten injection molding raw material into the first molding cavity chamber 21, and solidifying to obtain an intermediate body with an inner layer 100;
a middle layer injection molding step: injecting part of injection molding raw materials in a molten state into the second molding cavity chamber 22 in the middle injection molding step in advance, wherein the injection amount is 65% of the total injection molding amount of the middle injection molding step, transferring the inner layer 100 into the second molding cavity chamber 22 through the manipulator 4, dividing the movement track of the transfer process of the manipulator 4 into three steps of lifting, moving and placing, wherein the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the movement distance of the movement action is equal to the distance between the first molding cavity chamber 21 and the second molding cavity chamber 22, namely A, B and C shown in figure 2 are carried out, the injection molding raw materials in the molten state in the second molding cavity chamber 22 are attached to the inner layer 100, and an intermediate body with the middle layer 200 is obtained after cooling;
outer layer injection molding: injecting part of injection molding raw materials in a molten state into the third molding cavity chamber 23 in the outer layer injection molding step in advance, wherein the injection amount is 65% of the total injection amount of the outer layer injection molding step, transferring the middle layer 200 into the third molding cavity chamber 23 through the manipulator 4, wherein the movement track of the transfer process of the manipulator 4 is divided into three steps of lifting, moving and placing, the movement tracks of two adjacent steps of the manipulator 4 are mutually vertical, the movement distance of the movement action is equal to the distance between the second molding cavity chamber 22 and the third molding cavity chamber 23, namely A, B and C shown in figure 2 are carried out, the injection molding raw materials in the molten state in the third molding cavity chamber 23 are attached to the middle layer 200, the outer layer 300 is obtained after cooling, and then the finished product is obtained through two actions D and E shown in figure 2 by the manipulator 4.
The inner layer injection molding step, the middle layer injection molding step and the outer layer injection molding step of different finished products are nested, namely, the first product is subjected to the outer layer injection molding step, the second product is subjected to the inner layer injection molding step, and the third product is subjected to the inner layer injection molding step.
Comparative example 3
The present comparative example provides a multiple injection molding method:
inner layer injection molding: injecting a molten injection molding raw material into a molding cavity, and solidifying to obtain an intermediate with an inner layer 100;
a middle layer injection molding step: further opening a molding cavity by sliding a slide block or an insert, injecting a molten injection molding raw material, and cooling to obtain an intermediate with a middle layer 200;
outer layer injection molding: and (3) completely opening the molding cavity by sliding the slide block or the insert, injecting the injection molding raw material in a molten state, and cooling to obtain a finished product with the outer layer 300.
Application example 1
Finished products were prepared by the molding methods provided in example 2, example 5, comparative example 1, comparative example 2, and comparative example 3, respectively, using the same inner layer raw material, middle layer raw material, and outer layer raw material. In the same experimental conditions and experimental time, the number of finished products prepared by different methods and the qualification rate of the finished products are counted, and the results are shown in the following table:
| molding method | Number of finished products (number) | Percent pass (%) |
| Example 2 | 531 | 99.8 |
| Example 5 | 862 | 100 |
| Comparative example 1 | 621 | 99.7 |
| Comparative example 2 | 613 | 100 |
| Comparative example 3 | 105 | 71.4 |
And (4) analyzing results: from the above experimental results, it can be seen that the molding method provided in example 5 has the best production efficiency and the highest yield, and thus the intended object of the present invention is achieved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms of the fixed die plate 1, the molding chamber 2, the fixed die insert 3, the robot arm 4, the first molding chamber 21, the second molding chamber 22, the third molding chamber 23, the inner layer 100, the middle layer 200, the outer layer 300, etc., are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. The utility model provides a monochromatic injection mold of thick wall lens multilayer, includes fixed die plate (1) and sets up forming cavity (2) on fixed die plate (1), and every forming cavity (2) all is linked together its characterized in that with a runner of moulding plastics: the forming chambers (2) are at least two and are sequentially arranged into at least one row, and the volume of the forming chambers (2) in one row is gradually increased from one end to the other end.
2. A thick-walled lens multi-layer monochromatic injection mold as claimed in claim 1, wherein: the molding cavity (2) is three, and comprises a first molding cavity (21), a second molding cavity (22) and a third molding cavity (23), wherein the first molding cavity (21), the second molding cavity (22) and the third molding cavity (23) are sequentially arranged into a row, the second molding cavity (22) is positioned between the first molding cavity (21) and the third molding cavity (23), the volume of the first molding cavity (21) is smaller than that of the second molding cavity (22), and the volume of the third molding cavity (23) is larger than that of the second molding cavity (22).
3. A thick-walled lens multi-layer monochromatic injection mold as claimed in claim 2, wherein: the distance between the first forming cavity (21) and the second forming cavity (22) is equal to the distance between the third forming cavity (23) and the second forming cavity (22).
4. A thick-walled lens multi-layer monochromatic injection mold as claimed in claim 1, wherein: the die comprises a fixed die insert (3) movably connected in a fixed die plate (1), wherein the fixed die plate (1) is arranged on the fixed die insert (3).
5. A molding method using the thick-walled lens multi-layer monochromatic injection mold of claim 3, characterized by comprising the steps of:
inner layer injection molding: injecting a molten injection molding raw material into a first molding cavity (21), and solidifying to obtain an intermediate body with an inner layer (100);
a middle layer injection molding step: transferring the inner layer (100) into a second molding cavity (22) through a manipulator (4), attaching the injection molding raw material in a molten state in the second molding cavity (22) to the inner layer (100), and cooling to obtain an intermediate body with the middle layer (200);
outer layer injection molding: and transferring the middle layer (200) into a third forming cavity (23) through a manipulator (4), attaching the injection molding raw material in a molten state in the third forming cavity (23) to the middle layer (200), and cooling to obtain an outer layer (300) so as to obtain a finished product.
6. The molding method according to claim 5, wherein: the inner layer injection molding step, the middle layer injection molding step and the outer layer injection molding step of different finished products are nested.
7. The molding method according to claim 5, wherein: the movement track of the transfer process of the manipulator (4) is divided into three steps of lifting, moving and putting.
8. The molding method according to claim 7, wherein: the motion tracks of two adjacent steps of the manipulator (4) are mutually vertical, and the moving distance of the moving motion is equal to the distance between the first molding cavity (21) and the second molding cavity (22).
9. The molding method according to claim 5, wherein: in the middle layer injection molding step and the outer layer injection molding step, before the manipulator (4) puts the intermediate body into the second molding cavity (22) or the third molding cavity (23), a step of injecting part of injection molding raw materials in a molten state required in the step in advance is further included.
10. The molding method according to claim 9, wherein: the amount of the injection molding raw material injected in a molten state in advance is one third to one half of the total injection molding amount in the step.
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