CN116021717A - Injection molding manufacturing method and injection mold for long tubular product - Google Patents
Injection molding manufacturing method and injection mold for long tubular product Download PDFInfo
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- CN116021717A CN116021717A CN202211560816.0A CN202211560816A CN116021717A CN 116021717 A CN116021717 A CN 116021717A CN 202211560816 A CN202211560816 A CN 202211560816A CN 116021717 A CN116021717 A CN 116021717A
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- 238000002347 injection Methods 0.000 title claims abstract description 109
- 239000007924 injection Substances 0.000 title claims abstract description 109
- 238000001746 injection moulding Methods 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title abstract description 17
- 230000004044 response Effects 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 238000003786 synthesis reaction Methods 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 238000007747 plating Methods 0.000 claims description 3
- 230000002950 deficient Effects 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 abstract description 5
- 230000001151 other effect Effects 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 229920003023 plastic Polymers 0.000 abstract description 2
- 239000004033 plastic Substances 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 12
- 239000010410 layer Substances 0.000 description 11
- 230000007704 transition Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002346 layers by function Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
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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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
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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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
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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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
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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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
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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
- B29L2023/00—Tubular articles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The application discloses injection molding manufacturing method of long tubular product and injection mold thereof, this injection molding manufacturing method includes the compound die processing to the injection molding in the synthetic die cavity to wrap up and form long tubular product on the second line position, first line position and second line position are mutually supported and are held against the stability of having guaranteed first line position when moulding plastics, can not produce the skew and then lead to appearing the defective product owing to pressurize or other effects. In response to the injection mold reaching the preset temperature, the first line position and the second line position are withdrawn from the injection mold in sequence, at the moment, the injection mold is not opened, the mold still forms stable clamping and positioning on the periphery of the product, disturbance deformation caused by unstable positioning of the product is avoided, the product is also enabled to have no external space, and the possibility that the product can deform when the first line position and the second line position are withdrawn is reduced. And after the first row position and the second row position are completely withdrawn from the injection mold, opening the injection mold, and ejecting the long tubular product.
Description
Technical Field
The present disclosure relates to the field of injection molding, and in particular, to a method for manufacturing a long tubular product by injection molding and an injection mold thereof.
Background
The core-pulling mechanism of the existing mold mainly comprises a sliding block core-pulling mechanism and an inclined ejection core-pulling mechanism. The slide block core pulling mechanism requires that all glue position surfaces on the slide block have certain draft angle in the moving direction, otherwise, the mould is a metal part, and the required product is a plastic part generally, so that when the product is pulled out from the mould, the pulling is generated, and the yield of the product is reduced.
In addition, in the conventional core pulling mechanism, when the product is subjected to the demolding and demolding operation, the front mold and the rear mold are preferentially opened, and the long tubular product is required to be thin in wall, so that the product is easy to deform due to a certain tensile force when the product is subjected to demolding.
Disclosure of Invention
The application provides an injection molding manufacturing method of a long tubular product and an injection mold thereof, so as to solve the problem that the inclined demolding easily causes product deformation when the long tubular product is demolding.
In one aspect of the present application, there is provided an injection molding method of manufacturing a long tubular product, the injection molding method comprising: providing an injection mold and performing mold closing treatment, wherein the injection mold comprises a first row of positions and a second row of positions which are mutually propped and positioned, and the first row of positions are arranged in a synthetic cavity; injection molding into the synthesis cavity to wrap the second row to form a long tubular product; sequentially withdrawing the first row position and the second row position from the injection mold in response to the injection mold reaching a preset temperature; and after the first row position and the second row position are completely withdrawn from the injection mold, opening the injection mold, and ejecting the long tubular product.
Specifically, before the injection mold reaches the preset temperature, the method further comprises: and cooling the injection mold.
Specifically, the cooling the injection mold includes: providing a preset cooling device; calculating cooling time according to the cooling parameters of the cooling equipment, the volume and material characteristics of the long tubular product and the preset temperature; and finishing cooling and prompting the injection mold to reach the preset temperature in response to the cooling time.
Specifically, the surface of the second row is provided with a release coating.
Specifically, in the process of exiting the second line, water carrying treatment is also required for the second line.
Specifically, the injection molding into the synthetic cavity comprises: injecting glue into the synthetic cavity through an injection molding machine; and after the glue injection is completed, the injection molding machine keeps preset pressure to the injection mold, and the screw rod of the injection molding machine stays still to perform pressure maintaining treatment.
Specifically, the first row of bits and the second row of bits are coaxially arranged along a direction perpendicular to gravity.
The utility model provides an injection mold of long tubular product on the other hand, including fore-set and the back mould of mutually supporting, just the fore-set with be formed with synthetic die cavity after the back mould compound die, still be provided with the first position and the second position of lining that push up each other on the back mould, first position with the second is lining the position along the coaxial setting of perpendicular to gravity direction, wherein, first position holding is in synthetic die cavity.
Specifically, the surface of the second row is provided with a release coating.
Specifically, the anti-sticking coating is a titanium metal plating layer.
Specifically, a water carrying channel is arranged in the second row position.
Specifically, the second row position further comprises a connecting block extending out of the synthetic cavity, and the rear die comprises a stop block which abuts against the product and is used for ejecting the product. The second row passes through the stop block, and the second row comprises an operating handle extending out of the synthetic cavity. The injection mold further comprises a hydraulic mechanism, the hydraulic mechanism performs injection molding on the injection mold, and pressure maintaining is achieved.
The beneficial effects of this application are: the injection molding manufacturing method of the long tubular product comprises the steps of providing an injection mold and performing mold closing treatment, wherein the injection mold comprises a first row of positions and a second row of positions which are mutually propped against each other to be positioned, and the first row of positions are arranged in a synthetic cavity, so that the stability of the first row of positions in injection molding is ensured, and the phenomenon that the defective product is caused due to offset caused by pressure maintaining or other effects is avoided. And (3) injection molding into the synthesis cavity to wrap the second row to form a long tubular product. In response to the injection mold reaching the preset temperature, the first row position and the second row position are withdrawn from the injection mold in sequence, so that the injection mold reaches the preset temperature, namely, the cooling process, is used for completely cooling the injection mold, so that the product is completely shaped, and in the process that the first row position and the second row position are withdrawn in sequence, the injection mold is not opened at the moment, the mold still forms stable clamping and positioning on the periphery of the product, disturbance deformation caused by unstable positioning of the product is avoided, and the product is free of external space, so that the possibility that the product deforms when the first row position and the second row position are withdrawn is reduced. And after the first row position and the second row position are completely withdrawn from the injection mold, opening the injection mold, and ejecting the long tubular product.
Drawings
FIG. 1 is a schematic view of an embodiment of an injection mold of the present application;
FIG. 2 is a schematic view of a partial cross-sectional structure of FIG. 1;
FIG. 3 is a schematic flow chart of an embodiment of an injection molding method for manufacturing a long tubular product of the present application, wherein the test method includes a step S2 and a step S3;
FIG. 4 is a flowchart illustrating an embodiment of the step S30 before the step S3 shown in FIG. 3;
FIG. 5 is a flowchart illustrating an embodiment of the step S2 shown in FIG. 3;
fig. 6 is a schematic flow chart of the whole injection molding manufacturing method of the long tubular product of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, interfaces, techniques, etc., in order to provide a thorough understanding of the present application.
The terms "system," "unit," and "network" are often used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. Further, "a plurality" herein means two or more than two.
In one aspect of the present application, there is provided an injection mold 10 for a long tubular product, comprising a front mold 1 and a rear mold 2 which are matched with each other, and a synthetic cavity is formed after the front mold 1 and the rear mold 2 are clamped. Referring to fig. 1 and 2 in combination, fig. 1 is a schematic structural diagram of an embodiment of an injection mold 10 according to the present application; fig. 2 is a schematic view of a partial cross-sectional structure of fig. 1. The back mold 2 is also provided with a first row position 21 and a second row position 22 which are propped against each other, and the first row position 21 and the second row position 22 are coaxially arranged along the direction vertical to the gravity, so that the first row position 21 and the second row position 22 are ensured not to deviate due to the pressure effect when the injection molding machine 3 performs injection molding, and unnecessary defective products are generated. Wherein the first row 21 is accommodated in the synthesis cavity. The first row position 21 and the second row position 22 are horizontally arranged and have no included angle with the horizontal direction, and at this time, the injection mold 10 is ejected at zero degrees during the mold ejection. That is, the injection mold 10 of the long tubular product does not have a certain inclination, so that the obtained product is not affected by the inclination angle, the precision of the product obtained by the injection mold 10 is further improved, and the long tubular product with larger built-in capacity is obtained, thereby more meeting the requirements of the existing product and development.
In some embodiments, the surface of the first row of bits 21 is provided with a release coating. Since the first row position 21 and the second row position 22 are coaxially arranged perpendicular to the gravity direction, the injection mold has no certain inclination, and certain difficulty is caused to take out the product. In order to take out the product smoothly, a larger drawing force is required compared with the inclined ejector core pulling structure. Because of the larger drawing force, the whole injection mold 10 is more easily influenced by the pulling force when the product is drawn out, and certain damage is generated to the product. Thus, to reduce or even avoid damage to the product, the second row 22 is thus release coated. Further, the release coating is typically a tie layer comprising an abrasion resistant transition layer on the tie layer and a release functional layer on the abrasion resistant transition layer. The bonding layer is typically formed by PVD coating techniques.
In some specific embodiments, the release coating is a titanium metal plating. Compared with other metal coatings, the titanium metal can be used for a long time at the high temperature of 600 ℃ without fatigue and is not easy to deform under the condition of high-temperature open fire. But the product has great rigidity after molding and is not easy to deform after molding. On the other hand, the titanium metal is safer, and although the titanium metal coating on the second row position 22 is worn and stained on the product when the product is extracted, the titanium metal coating can not have metallic influence on a human body when in use.
To better cool the product in the injection mold 10 and allow it to be molded faster, please continue with reference to fig. 2. In some embodiments, a water transport channel 220 is provided within the second row 22. The cooling water is circularly conveyed in the water conveying channel 220, so that the cooling speed of the product is increased, the product is prevented from generating uneven problems in the injection mold 10 due to uneven temperature, and the possibility of producing defective products is reduced.
In some embodiments, the second row 22 further includes a connecting block 221 extending from the synthetic cavity, and the rear mold 2 includes a stopper 20, where the stopper 20 abuts against the product, so as to eject the product. The stopper 20 is used for ejecting the product from the whole injection mold 10, and the stopper is also arranged along the direction perpendicular to the gravity, and since the stopper 20 is in vertical contact with the product, after the product is completely cooled, the product is ejected from the rear end of the product by using the stopper 20, so that the product cannot be damaged. The injection mold 10 further includes a hydraulic mechanism (not shown), which injects the injection mold 10 with the hydraulic mechanism and maintains pressure. The arrangement of the connecting block 221 increases the contact area between the second line position 22 and the second line position 22 when the hydraulic structure pulls out, further ensures the stability of the second line position 22, further ensures that the second line position 22 cannot shake when being pulled out, and reduces the possibility of scratches on products caused by shake.
Specifically, based on the injection mold 10 for long tubular products, the present application further provides a method for manufacturing long tubular products by injection molding, referring to fig. 3 and 6 in combination, fig. 3 is a schematic flow chart of an embodiment of the method for manufacturing long tubular products by injection molding of the present application; fig. 6 is a schematic flow chart of the whole injection molding manufacturing method of the long tubular product of the present application. The injection molding manufacturing method of the long tubular product comprises the following steps:
step S1: an injection mold 10 is provided and a mold clamping process is performed. In injection molding, it is necessary to mold the injection mold 10 so that the injection mold 10 forms a synthetic cavity of the product. The synthetic cavity provides space for the formation of the product, a cavity of the product is formed, and the injection molding sol flows in the synthetic cavity under the action of the hydraulic injection molding machine and fills the whole synthetic cavity. The synthetic cavity is a tubular space formed by the inner space formed by the front and rear mold closing and the space occupied by most of the second row positions 22 and part of the first row positions 21, and meanwhile, the whole synthetic cavity is tightly closed under the action of the mold closing, so that the injection molding material is ensured not to overflow out of the cavity.
Specifically, the injection mold comprises a first row of positions 21 and a second row of positions 22 positioned against each other, and the first row of positions 21 is arranged in the synthesis cavity for forming small holes in the strip-shaped tubular product and avoiding the internal vacuum thereof.
Preferably, the surface of the first row of sites 21 and the second row of sites 22 is provided with a release coating. Similarly, the release coating is also a tie layer, including a wear resistant transition layer on the tie layer and a release functional layer on the wear resistant transition layer. The bonding layer is typically formed by PVD coating techniques.
Step S2: injection molding into the synthesis cavity to wrap over the first row 21 to form a long tubular product. In one embodiment, the first row 21 and the second row 22 are arranged coaxially in a direction perpendicular to the gravitational force. And (2) carrying out injection molding on the synthetic cavity in the injection mold 10 on the basis of the mold closing and injection mold 10 in the step S1, so as to obtain a long tubular product perpendicular to the gravity direction. Compared with other core-pulling injection molds 10 with certain inclination, the long tubular product can have larger internal accommodating area, can accommodate more other parts and meets the requirements of the technical field of modern structures.
Step S3: in response to the injection mold 10 reaching a preset temperature, the first row 21 and the second row 22 are sequentially withdrawn from the injection mold 10. The process of making the injection mold 10 reach the preset temperature is a cooling process, through which the injection mold 10 is completely cooled, and on the basis of the step S2, the first row 21 is preferentially withdrawn on the basis of not opening the mold, so as to ensure that the small hole end of the long tubular product is smooth, avoid shrinkage cavity of the product in vacuum, produce defective products, and reduce the product and the yield. The second line position 22 is withdrawn from the product mold after the first line position 21 is completely withdrawn, at this time, the front mold 1 and the rear mold 2 are not opened, although the product is likely to be deformed when the second line position 22 is withdrawn, the injection mold 10 is not opened, the injection mold 10 still forms stable clamping and positioning on the periphery of the product, disturbance deformation caused by unstable positioning of the product is avoided, and the product is free of external space, so that the possibility that the product is deformed when the first line position 21 and the second line position 22 are withdrawn is reduced.
Step S4: after the first row 21 and the second row 22 are completely withdrawn from the injection mold 10, the injection mold 10 is opened and the long tubular product is ejected.
In some specific embodiments, when injection molding is performed, the heat generated by the operations such as mold clamping and pressure maintaining in the above-described step S1 and step S2 is large. The injection mold 10 is thus cooled manually to a predetermined temperature. In the injection mold 10 for long tubular products of the present application, the water carrying channel 220 is provided in the second row location 22, and by continuously circulating and conveying cooling water in the water carrying channel 220, the second row location 22 can be subjected to water carrying treatment in the process of exiting the second row location 22. Thereby further helping the product and the whole injection mold 10 to quickly cool down, reducing the molding shrinkage of the product, further reducing the possibility of buckling deformation of the product and maintaining the yield.
In summary, the injection molding method for manufacturing the long tubular product provided by the present application includes providing the injection mold 10 and performing mold clamping, wherein the injection mold 10 includes a first row position 21 and a second row position 22 that are positioned against each other, and the first row position 21 is disposed in the synthesis cavity, so that stability of the first row position 21 during injection molding is ensured, and no offset is generated due to pressure maintaining or other effects, thereby causing defective products. Injection molding into the synthesis cavity to wrap over the second row 22 to form a long tubular product. In response to the injection mold 10 reaching the preset temperature, the first row position 21 and the second row position 22 are withdrawn from the injection mold 10 in sequence, so that the injection mold 10 reaches the preset temperature, namely, the cooling process, is used for completely cooling the injection mold 10, so that the product is completely shaped, and in the process of withdrawing the first row position 21 and the second row position 22 in sequence, the injection mold 10 is not opened, the mold still forms stable clamping and positioning on the periphery of the product, disturbance deformation caused by unstable positioning of the product is avoided, and the possibility that the product is deformed when the first row position 21 and the second row position 22 are withdrawn is reduced due to no external space. After the first row 21 and the second row 22 are completely withdrawn from the injection mold 10, the injection mold 10 is opened and the long tubular product is ejected.
In some embodiments, before step S3, in order to accelerate cooling of the injection mold 10 and improve the production efficiency of the product, the method further includes step S30: the injection mold 10 is cooled. It will be appreciated that the longer the cooling time, the greater the likelihood of deformation of the injection molded product, due to the slower rate of natural cooling. Therefore, the injection mold can be cooled by intervention of external means.
In order to improve the production efficiency of the product and avoid the deformation of the product due to the excessively high cooling temperature, the cooling temperature of the injection mold 10 needs to be calculated and set in advance according to different materials and needs, and the product is cooled by a certain means. Thus, a cooling device (not shown) for cooling the product by providing a water carrying passage or other means for the injection mold 10 is additionally provided outside the injection mold 10.
Specifically, referring to fig. 4, fig. 4 is a flowchart illustrating an embodiment of a step S30 before the step S3 shown in fig. 3, where the step S30 specifically includes:
step S301: and calculating the cooling time according to the cooling parameters of the cooling equipment, the volume and material characteristics of the long tubular product and the preset temperature. Products made of different materials have different cooling parameters and cooling preset temperatures.
Because the product is arranged along the direction perpendicular to the gravity, although the arrangement can produce a product with a thinner wall thickness than other injection molds 10 with a certain inclination, the arrangement problem is that the cooling time is required to be prolonged in order to achieve the same cooling effect as a similar product made of the same material. In some embodiments, the injection mold 10 of the present application requires a cooling time of greater than or equal to 30 seconds. For example, in setting up multiple cycles using circulating cooling water, cooling for 50 seconds is required.
Step S302: in response to the cooling time being reached, the first row 21 and the second row 22 are sequentially withdrawn from the injection mold 10.
Referring to fig. 5, fig. 5 is a flowchart illustrating an embodiment of step S2 shown in fig. 3. The step S2 specifically comprises the following steps:
step S21: glue is injected into the synthetic cavity through the injection molding machine 3. Before the injection molding machine 3 is used for injecting glue, under the condition of ensuring the correct melting temperature, the injection molding machine 3 needs to be tested, residual waste materials in the injection molding machine 3 are extruded until all the injection molding machine 3 is new materials, and the injection molding and glue injection operation is carried out on the injection mold 10 jin.
Step S22: in response to completion of the injection, the injection molding machine 3 maintains a preset pressure to the injection mold 10, and the screw of the injection molding machine 3 remains stationary to perform the pressure maintaining process. The pressure maintaining is to prevent the molten glue from flowing back when cooling. Inevitably, certain shrinkage can be generated in the cooling process of the product, and when the pressure is maintained, the injection molding machine 3 continuously injects molten glue into the injection mold 10, so that the empty space generated when cold shrinkage occurs is supplemented, the optimal molding quality of the product is ensured, and the yield is improved.
In the description of the present application, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, mechanism, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, mechanisms, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing is only the embodiments of the present application, and not the patent scope of the present application is limited by the foregoing description, but all equivalent structures or equivalent processes using the contents of the present application and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the patent protection scope of the present application.
Claims (12)
1. A method of injection molding a long tubular product, comprising:
providing an injection mold and performing mold closing treatment, wherein the injection mold comprises a first row position and a second row position which are mutually propped and positioned, and the second row position is arranged in a synthetic cavity;
injection molding into the synthesis cavity to wrap the second row to form a long tubular product;
sequentially withdrawing the first row position and the second row position from the injection mold in response to the injection mold reaching a preset temperature;
and after the first row position and the second row position are completely withdrawn from the injection mold, opening the injection mold, and ejecting the long tubular product.
2. The injection molding method of claim 1, wherein said responding to said injection mold reaching said predetermined temperature further comprises:
and cooling the injection mold.
3. The injection molding method of claim 2, wherein the cooling the injection mold comprises:
providing a preset cooling device;
calculating cooling time according to the cooling parameters of the cooling equipment, the volume and material characteristics of the long tubular product and the preset temperature;
and finishing cooling and prompting the injection mold to reach the preset temperature in response to the cooling time.
4. The injection molding method of claim 1, wherein the surface of the second row is provided with a release coating.
5. The injection molding method of claim 1, wherein the second row is further treated by water during the exiting of the second row.
6. The injection molding method according to claim 1, wherein the injection molding into the synthetic cavity comprises:
injecting glue into the synthetic cavity through an injection molding machine;
and after the glue injection is completed, the injection molding machine keeps preset pressure to the injection mold, and the screw rod of the injection molding machine stays still to perform pressure maintaining treatment.
7. The injection molding method according to claim 1, wherein,
the first row of bits and the second row of bits are coaxially arranged along a direction perpendicular to gravity.
8. An injection mold for long tubular products comprises a front mold and a rear mold which are matched with each other, and a synthetic cavity is formed after the front mold and the rear mold are clamped,
the rear mold is also provided with a first row of positions and a second row of positions which are mutually propped against each other, and the first row of positions and the second row of positions are coaxially arranged along the direction vertical to the gravity, wherein the first row of positions are accommodated in the synthesis cavity.
9. The injection mold of claim 8, wherein the surface of the second row is provided with a release coating.
10. The injection mold of claim 9 wherein the release coating is a titanium metal plating.
11. The injection mold of claim 8, wherein a water carrying channel is disposed in the second row.
12. The injection mold of claim 8 wherein said back mold includes a stop thereon, said stop abutting said product for ejecting said product;
the second row position passes through the stop block and comprises an operating handle extending out of the synthetic cavity;
the injection mold further comprises a hydraulic mechanism, the hydraulic mechanism performs injection molding on the injection mold, and pressure maintaining is achieved.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211560816.0A CN116021717A (en) | 2022-12-06 | 2022-12-06 | Injection molding manufacturing method and injection mold for long tubular product |
| PCT/CN2023/071681 WO2024119587A1 (en) | 2022-12-06 | 2023-01-10 | Injection molding manufacturing method for long tubular products and injection mould therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211560816.0A CN116021717A (en) | 2022-12-06 | 2022-12-06 | Injection molding manufacturing method and injection mold for long tubular product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116021717A true CN116021717A (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211560816.0A Pending CN116021717A (en) | 2022-12-06 | 2022-12-06 | Injection molding manufacturing method and injection mold for long tubular product |
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| CN (1) | CN116021717A (en) |
| WO (1) | WO2024119587A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102012205196A1 (en) * | 2012-03-30 | 2013-10-02 | Sumitomo (Shi) Demag Plastics Machinery Gmbh | Injection molding machine for producing multilayer plastic molded parts from a uniform thermoplastic material and corresponding manufacturing method |
| CN208006184U (en) * | 2017-12-18 | 2018-10-26 | 深圳市山德实业有限公司 | A kind of moulding liftout attachment |
| CN113580506A (en) * | 2021-08-16 | 2021-11-02 | 深圳市精诚塑胶模具有限公司 | Injection molding device and method for preventing core deformation of elongated tubular plastic product |
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- 2022-12-06 CN CN202211560816.0A patent/CN116021717A/en active Pending
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| WO2024119587A1 (en) | 2024-06-13 |
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