CN112895361A - Oxyhydrogen atomizer casing injection mold - Google Patents

Oxyhydrogen atomizer casing injection mold Download PDF

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Publication number
CN112895361A
CN112895361A CN202110388903.1A CN202110388903A CN112895361A CN 112895361 A CN112895361 A CN 112895361A CN 202110388903 A CN202110388903 A CN 202110388903A CN 112895361 A CN112895361 A CN 112895361A
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CN
China
Prior art keywords
mold
template
oxyhydrogen
matched
mold core
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CN202110388903.1A
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Chinese (zh)
Inventor
翁燕华
陈祥
宗小行
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Shanghai Lijin Plastic Mould Co ltd
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Shanghai Lijin Plastic Mould Co ltd
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Priority to CN202110388903.1A priority Critical patent/CN112895361A/en
Publication of CN112895361A publication Critical patent/CN112895361A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/72Heating or cooling
    • B29C45/73Heating or cooling of the mould
    • B29C45/7312Construction of heating or cooling fluid flow channels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/2602Mould construction elements
    • B29C45/2606Guiding or centering means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/33Moulds having transversely, e.g. radially, movable mould parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/34Moulds having venting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/753Medical equipment; Accessories therefor

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention relates to the technical field of molds, in particular to an injection mold for a shell of a oxyhydrogen atomizer. The oxyhydrogen atomizer shell injection mold comprises a panel, a sprue bush, a front template, a front mold core, a rear template, a first slide block, a second slide block and a rear mold base; the panel, the front template, the front mold core, the rear template and the rear mold base are sequentially arranged; the front mold core and the rear mold core are arranged oppositely up and down, the front mold core is matched on the front template, and the rear mold core is matched on the rear template; the first sliding block and the second sliding block are horizontally arranged oppositely and are respectively arranged between the front template and the rear template; the rear template is matched with the rear die holder through the guide post. The heat dissipation uniformity in the product curing process is ensured, the structural integrity and the accuracy of the shell of the oxyhydrogen atomizer are ensured, the cooling efficiency is improved, and the production cost is reduced.

Description

Oxyhydrogen atomizer casing injection mold
Technical Field
The invention relates to the technical field of molds, in particular to an injection mold for a shell of a oxyhydrogen atomizer.
Background
The oxyhydrogen atomizer is an important medical health-care device, can provide oxyhydrogen gas mixture, enters a human body through a respiratory system to treat diseases, and can be mixed with atomized liquid medicine particles to be used for medical institutions and families to carry out atomization inhalation and humidification treatment on the human body. The shell of the oxyhydrogen atomizer is generally prepared by an injection mold, the structural integrity and the dimensional accuracy of the product of the shell of the oxyhydrogen atomizer have direct relation with a phantom of the shell of the oxyhydrogen atomizer, and the incomplete structure or the inaccurate size of the shell of the prepared oxyhydrogen atomizer can be caused by water vapor contained in raw materials and uneven heat dissipation in the curing process in the injection molding process. In addition, the cooling efficiency is not high, the cooling speed is low, and the forming efficiency of the shell of the oxyhydrogen atomizer is influenced, so that the cost is increased.
Disclosure of Invention
The invention aims to provide an injection mold for a shell of a hydrogen-oxygen atomizer, which aims to solve the problems in the background technology.
In order to solve the problems, the invention provides an injection mold for a shell of a oxyhydrogen atomizer, which comprises a panel, a sprue bush, a front template, a front mold core, a rear template, a first slide block, a second slide block and a rear mold base;
the panel, the front template, the front mold core, the rear template and the rear mold base are sequentially arranged; the front mold core and the rear mold core are arranged oppositely up and down, the front mold core is matched on the front template, and the rear mold core is matched on the rear template; the first sliding block and the second sliding block are horizontally arranged oppositely and are respectively arranged between the front template and the rear template; the rear template is matched with the rear die holder through the guide post.
As a preferred technical scheme, the front mold core, the rear mold core, the first slide block and the second slide block enclose a mold cavity of the shell of the oxyhydrogen atomizer, a sprue bush is arranged in the glue injection hole, and the sprue bush penetrates through the front mold core and extends into the mold cavity; an injection sprue is arranged on the panel and corresponds to the sprue bush.
As a preferred technical scheme, a front mold cooling pipe is arranged on one surface, matched with the front mold core, of the front mold plate, and the front mold cooling pipe is connected with circulating cooling liquid through a front mold cooling port.
As a preferred technical scheme, an inclined guide post is further arranged on one surface of the front template matched with the front mold core, and the inclined guide post respectively penetrates through the first sliding block and the second sliding block to be positioned on the rear template.
As a preferred technical scheme, a front template positioning block is further arranged on one surface of the front template matched with the front mold core, and the front template positioning block is matched with the rear template positioning groove.
As a preferable technical scheme, an exhaust groove is formed in the matched surface of the front mold core and the front mold plate.
As a preferred technical scheme, a rear mold cooling pipe is arranged on one surface of the rear mold plate matched with the rear mold core, and the rear mold cooling pipe is connected with circulating cooling liquid through a rear mold cooling port.
As the mold core is directly contacted with the injection molding raw material, some components in the injection molding raw material can corrode the mold core at high temperature, and as a preferred technical scheme, in order to improve the corrosion resistance of the mold core, the surfaces of the front mold core and the rear mold core are plated with a protective layer.
As a preferred technical solution, the preparation method of the protective layer comprises:
s1, removing dust on the surface of the mold core, putting the mold core into a sodium hydroxide solution with the concentration of 5g/L, and degreasing for 10min at the ultrasonic frequency of 45kHz and the temperature of 35 ℃;
s2, after degreasing, putting the mold core into a hydrogen peroxide solution with the mass concentration of 2% to activate for 1 min;
s3, adding a chemical nickel plating solution into the plating bath, putting the activated mold core into the plating bath, carrying out chemical nickel plating at the plating temperature of 80-85 ℃, taking out the optical mold core after electroplating for 15-30min, and cleaning;
s4, placing the mold core after chemical nickel plating into a vacuum aging furnace with the temperature of 100-150 ℃ to bake for 4-5 h. After baking, the density of the nickel-plated layer of the mold core is further improved, the nickel-plated layer is combined with the mold core, the finish degree of the plated layer is also improved, and the demolding of the product is facilitated.
As a preferred technical scheme, the chemical nickel plating solution comprises 100g/L nickel sulfate; 8-10g/L of sodium hypophosphite, 10-12g/L of sodium phosphite and 4-5g/L of sodium dodecyl sulfate. In the prior art, the reducing agents used in the chemical plating are mostly formaldehyde, sodium borohydride, sodium hydroxide, sodium,Dimethylaminoborane and the like; but the plating solution of formaldehyde is unstable, and meanwhile, formaldehyde is toxic and pollutes the environment, and sodium borohydride is extremely easy to decompose in a non-strong alkaline solution; the price of the dimethyl amino borane is high; when the nickel sulfate is 100g/L, 8-10g/L sodium hypophosphite and 10-12g/L sodium phosphite are used as reducing agents, so that the potential of oxidation reduction can be reduced, the electroplating solution is more stable, the deposition layer on the irregular surface of the mold core is more uniform, the bonding force with the mold core is higher, and the corrosion resistance of the plating layer is improved. The concentration of sodium hypophosphite and sodium phosphite should not be too high or too low, which would affect Ni in the plating solution2+And H2PO2-The molar ratio of (a) and thereby the falling deposition rate; too high a ratio results in too fast nickel deposition, which affects the compactness of the mold insert, and too low a ratio results in too slow nickel deposition, which reduces the efficiency.
In addition, the influence of hydrogen generated in the electroplating process on the coating is often ignored in the plating solution in the prior art, but the addition of 4-5g/L of lauryl sodium sulfate has very good affinity with oil stains, gases and the like, and the hydrophobic groups and hydrophilic radical diagram sulfate radicals in the electroplating solution act synergistically to reduce the surface tension between the plating solution and a plated part, so that the hydrogen on the surface of the plated part is not easy to stay on a mold core in the electroplating process, otherwise, the plating layer cannot be plated in places with hydrogen bubbles on the surface of the plated part.
In the chemical plating process, the temperature is 80-85 ℃, the reaction speed is too high due to too high temperature, the plating bath is easy to collapse, the plating bath is failed, the temperature is too low, the plating is slow, the plating efficiency is influenced, and the plating cost is increased.
As a preferred technical scheme, the rear die holder comprises a bottom plate, and square irons are vertically arranged on two sides of the bottom plate.
As a preferred technical scheme, a cavity is defined by the bottom plate, the square iron and the rear template, and an ejection assembly and a guide column are arranged in the cavity.
As a preferred technical scheme, the ejection assembly comprises an ejector pin bottom plate, an ejector pin panel, a support column and an ejector pin; the upper part of the thimble is arranged in the rear die core, the lower part of the thimble is connected with a thimble panel, the thimble panel is matched on a thimble bottom plate, and the thimble bottom plate is matched on a bottom plate.
As a preferable technical scheme, the materials of the ejector pin of the die can be selected from SKD61, SKH51, SKD11 and 65 Mn.
As a preferable technical scheme, the material of the ejector pin of the die is selected from SKH51, and in order to improve the wear resistance and surface hardening of the ejector pin, the material of the ejector pin is subjected to nitriding treatment, wherein the nitriding treatment comprises the following steps:
heating the thimble material, and directly punching out the head part by using a head punching machine; performing rough turning treatment on a lathe, and reserving 0.02-0.03 mm; then the thimble is processed smoothly by centerless grinding; machining the head on an upper lathe, and centreless grinding the excircle of the control head; then putting the mixture into a nitriding furnace for nitriding treatment.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, a plurality of front mold cooling pipes are uniformly arranged on the matched surface of the front template and the front mold core side by side; evenly set up a plurality of front mould cooling tubes side by side on back template and the benevolence complex one side of back mould, and the distance between a plurality of front mould cooling tubes is the same to guarantee that the coolant liquid of circulation flow can play evenly refrigerated effect to front and back template and front and back mould benevolence, thereby ensure the temperature at different positions even, and then avoid the oxyhydrogen atomizer casing that obtains of moulding plastics to appear stress concentration and appear the structure damaged in the cooling solidification process, improve product quality. Meanwhile, the cooling efficiency is improved, the forming efficiency of the shell of the oxyhydrogen atomizer is improved, and the production cost is reduced.
2. The side, matched with the front template, of the front mold core is provided with a plurality of air exhaust grooves, the air exhaust grooves are transversely arranged and also longitudinally arranged, and air entering a mold cavity is exhausted to the maximum extent, so that the problems that a shell product of an oxyhydrogen atomizer is provided with air holes, mold filling is not full and even the product is burnt due to high temperature generated by compressed air because a certain amount of air originally exists in the mold cavity and a melt enters the mold cavity by bringing a part of air into the mold cavity are solved.
3. In order to ensure the size precision during mold closing, a front mold guide post sleeve and a front mold plate positioning block are also arranged on the matched surface of the front mold plate and the front mold core. The front mould guide post sleeve is matched with the rear mould guide post on the rear mould plate, and the front mould plate positioning block is matched with the rear mould plate positioning groove, so that the front mould core arranged on the front mould plate and the rear mould core arranged on the rear mould plate do not deviate in the mould closing injection and pressure maintaining processes, and the size precision of the shell of the oxyhydrogen atomizer is ensured.
4. In order to ensure the stability of the first sliding block, the second sliding block and the front template, two sliding block grooves are horizontally and oppositely arranged on the matched surface of the front template and the front mold core, and positioning blocks on the first sliding block and the second sliding block can be respectively matched with the sliding block grooves, so that the stability of the sliding process of the sliding blocks is improved, and unnecessary shaking is avoided.
Drawings
FIG. 1 is a schematic structural diagram of an injection mold for a housing of an oxyhydrogen atomizer according to the present invention;
FIG. 2 is a schematic structural diagram of a front mold plate of an injection mold for a housing of an oxyhydrogen atomizer according to the present invention;
FIG. 3 is an exploded view of an injection mold for a housing of an oxyhydrogen atomizer according to the present invention;
in the figure: 1. panel, 11, injection gate, 2, gate sleeve, 3, front mold plate, 31, front mold guide post sleeve, 32, front mold cooling opening, 33, front mold plate positioning block, 34, angle guide post, 35, front mold cooling tube, 36, slide groove, 37, front mold plate insert, 38, glue injection hole, 4, front mold core, 41, exhaust groove, 5, rear mold core, 51, rear mold core positioning block, 6, rear mold plate, 61, rear mold guide post, 62, rear mold cooling tube, 63, rear mold plate positioning groove, 64, rear mold cooling opening, 65, rear mold plate insert, 71, first slide block, 72, first slide block, 8, rear mold base, 81, support post, 82, thimble, 83, guide post, 84, bottom plate, 85, thimble bottom plate, 86, thimble panel, 87, square iron.
Detailed Description
The technical solutions of the present invention are described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of the present invention is not limited to the embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. To the extent that a definition of a particular term disclosed in the prior art is inconsistent with any definition provided in the present disclosure, the definition of the term provided in the present disclosure controls.
As used herein, a feature that does not define a singular or plural form is also intended to include a plural form of the feature unless the context clearly indicates otherwise. It will be further understood that the term "prepared from …," as used herein, is synonymous with "comprising," including, "comprising," "having," "including," and/or "containing," when used in this specification means that the recited composition, step, method, article, or device is present, but does not preclude the presence or addition of one or more other compositions, steps, methods, articles, or devices. Furthermore, the use of "preferred," "preferably," "more preferred," etc., when describing embodiments of the present invention, is meant to refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. In addition, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
Example 1
As shown in fig. 1, 2 and 3, an injection mold for a shell of an oxyhydrogen atomizer comprises a panel 1, a sprue bush 2, a front template 3, a front mold core 4, a rear mold core 5, a rear template 6, a slide block and a rear mold seat 8; the slide blocks comprise a first slide block 71 and a second slide block 72.
The panel 1, the front template 3, the front mold core 4, the rear mold core 5, the rear template 6 and the rear mold seat 8 are sequentially arranged; the front mold core 4 and the rear mold core 5 are arranged up and down oppositely, the front mold core 4 is matched on the front template 3, and the rear mold core 5 is matched on the rear template 6; the first slider 71 and the second slider 72 are horizontally arranged oppositely and are respectively arranged between the front template 3 and the rear template 6; the rear template 6 is matched with the rear die holder 8 through the guide posts 83.
The front mold core 4, the rear mold core 5, the first sliding block 71 and the second sliding block 72 enclose a mold cavity of a shell of the oxyhydrogen atomizer, a sprue bush 2 is arranged in the glue injection hole 38, and the sprue bush 2 penetrates through the front mold core 4 and extends into the mold cavity; the panel 1 is provided with an injection gate 11, and the injection gate 11 is arranged corresponding to the gate sleeve 2. The injection sprue 11 is circumferentially provided with a positioning ring, the positioning environment-friendly injection sprue 11 is consistent with the nozzle of the injection molding machine in position, and molten plastic sprayed from the nozzle of the injection molding machine sequentially enters the cavity through the injection sprue 11 and the sprue bush 2.
And a front mold cooling pipe 35 is arranged on one surface of the front mold plate 3 matched with the front mold core 4, and the front mold cooling pipe 35 is connected with circulating cooling liquid through a front mold cooling port 32 on the front mold plate 3. Compared with the prior art, the front mold cooling pipes 35 are uniformly arranged on the matched surface of the front mold plate 3 and the front mold core 4 side by side, and the distances among the front mold cooling pipes are the same, so that the front mold plate 3 and the front mold core 4 can be uniformly cooled by circularly flowing cooling liquid, the uniform temperature of different parts on the front mold plate 3 or the front mold core 4 is ensured, and the structural damage caused by stress concentration in the cooling and solidifying process of the shell of the oxyhydrogen atomizer obtained by injection molding is avoided. Meanwhile, the cooling efficiency is improved, the forming efficiency of the shell of the oxyhydrogen atomizer is improved, and the production cost is reduced.
In the same purpose, the rear template is also provided with a cooling system, a rear mold cooling pipe 62 is arranged on the surface of the rear template 6 matched with the rear mold core 5, and the rear mold cooling pipe 62 is connected with circulating cooling liquid through a rear mold cooling port 64.
In order to facilitate the demolding of the first sliding block 71 and the second sliding block 72, the front mold plate 3 and the front mold core 4 are further provided with an inclined guide post 34 on the matched surface, and each inclined guide post 34 respectively penetrates through the first sliding block 71 and the second sliding block 72 to be positioned on the rear mold plate 6. When the mold is opened, the inclined guide post 34 moves upwards along with the front mold plate 3, so that the first slide block 71 and the second slide block 72 are respectively pushed towards two sides, and the first slide block 71 and the second slide block 72 are separated from the finished oxyhydrogen gas atomizer shell.
In order to ensure the dimensional accuracy during mold closing, a front mold guide post sleeve 31 and a front mold plate positioning block 33 are further arranged on the surface, matched with the front mold core 4, of the front mold plate 3. The front die guide post sleeve 31 is matched with a rear die guide post 61 on the rear die plate 6, and the front die plate positioning block 33 is matched with a rear die plate positioning groove 63, so that the front die core 4 arranged on the front die plate 3 and the rear die core 5 arranged on the rear die plate 6 are prevented from deviating in the die assembly injection and pressure maintaining processes, and the size precision of the shell of the oxyhydrogen atomizer is ensured.
In order to ensure the stability of the first slider 71 and the second slider 72 in cooperation with the front mold plate 3, two slider grooves 36 are horizontally and oppositely arranged on the side of the front mold plate 3 in cooperation with the front mold core 4, and the positioning blocks on the first slider 71 and the second slider 72 can be respectively matched with the slider grooves 36, so that the stability of the sliders in the sliding process is improved, and unnecessary shaking is avoided.
When the melt is injected into the cavity, a certain amount of air is originally stored in the cavity of the mold, and in addition, a part of air is brought in when the melt enters the cavity of the mold, so that a shell product of the oxyhydrogen gas atomizer is provided with air holes and is not full of mold filling, and even the stored air is compressed to generate high temperature to burn the product. In order to solve the problem, the air discharge groove 41 is arranged on the surface of the front mold core 4 matched with the front template 3. The exhaust grooves 41 are arranged in a transverse and longitudinal manner, so that gas entering the mold cavity can be exhausted through the exhaust grooves 41 to the maximum extent, and the problem is avoided.
The front template 3 is also provided with a front template insert 37, and the rear template 6 is also provided with a rear template insert 65, so that on one hand, the front template insert can play a role in fixing the front mold core 4 and the rear mold core 5 to prevent the mold core from deviating, and on the other hand, the mold core is convenient to install and replace.
In order to ensure that the die assembly of the front die core 4 and the rear die core 5 does not deviate, rear die core positioning blocks 51 are arranged at different positions on the rear die core 5, and the rear die core positioning blocks 51 are matched with the grooves in the front die core 4 so as to ensure the die assembly stability of the front die core 4 and the rear die core 5.
The rear die holder 8 comprises a bottom plate 84, and square irons 87 are vertically arranged on two sides of the bottom plate 84.
The bottom plate 84, the square iron 87 and the rear template 6 form a cavity, and an ejection assembly and a guide column 83 are arranged in the cavity.
In order to facilitate the demoulding of the finished product of the shell of the oxyhydrogen gas atomizer and the rear mold core 5, the ejection assembly comprises an ejector pin bottom plate 85, an ejector pin panel 86, a support column 81 and an ejector pin 82; the upper portion of the thimble 82 is disposed in the rear core 5, the lower portion of the thimble 82 is connected to a thimble panel 86, the thimble panel 86 is fitted to a thimble base plate 85, and the thimble base plate 85 is fitted to a base plate 84. The top ends of the four supporting columns 81 abut against the rear mold plate 6, the bottom ends of the four supporting columns 81 penetrate through the ejector pin panel 86 and the ejector pin base plate 85 to abut against the base plate 84, and the ejector pin panel 86 plays a role in guiding the ejector pin panel 85 when moving. When the mold is opened, the plurality of ejector pins are ejected out simultaneously, the force of the plurality of ejector pins on the bottom surface of the finished product of the shell of the oxyhydrogen atomizer is uniform, and the finished product cannot be damaged.
The working principle is as follows: in the concrete working process of oxyhydrogen atomizer casing mould of this embodiment, after the mould compound die, melting plastics pass through injection runner 11 and sprue bush 2 and get into the recess of front mould benevolence 4, get into the die cavity through the runner on the recess lateral wall, keep warm a period and wait for oxyhydrogen atomizer casing shaping back, open back template 6, front mould benevolence 4 breaks away from the finished product under the drive of front template 3, oblique guide pillar 34 moves up simultaneously and drives first slider 71 and second slider 72 to both sides removal respectively, thereby make slider and finished product break away from, thimble 85 jack-up makes the finished product break away from back mould benevolence 5, so far an oxyhydrogen atomizer casing is made.
Example 2
Similar to example 1, but the material of the ejector pin of the mold is selected from SKH51, and in order to improve the wear resistance and surface hardening of the ejector pin, the material of the ejector pin is subjected to nitriding treatment, wherein the nitriding treatment comprises the following steps:
heating the thimble material, and directly punching out the head part by using a head punching machine; performing rough cutting treatment on the lathe, and finally reserving 0.03 mm; then the thimble is processed smoothly by centerless grinding; machining the head on an upper lathe, and centreless grinding the excircle of the control head; then putting the mixture into a nitriding furnace for nitriding treatment.
Example 3
Similar to example 1, but the front mold core 4 and the rear mold core 5 are coated with a protective layer. The preparation method of the protective layer comprises the following steps:
s1, respectively removing dust from the mold core, putting the mold core into a sodium hydroxide solution with the concentration of 5g/L, and degreasing for 10min at the ultrasonic frequency of 45kHz and the temperature of 35 ℃;
s2, after degreasing, putting the mold core into a hydrogen peroxide solution with the mass concentration of 2% to activate for 1 min;
s3, adding a chemical nickel plating solution into a plating bath, putting the activated mold core into the plating bath, carrying out chemical nickel plating at the plating temperature of 82 ℃, taking out the optical mold core after electroplating for 20min, and cleaning; the chemical nickel plating solution comprises 100g/L nickel sulfate; 10g/L of sodium hypophosphite, 12g/L of sodium phosphite and 5g/L of lauryl sodium sulfate.
S4, taking the mold core after chemical nickel plating, and baking the mold core in a vacuum aging furnace at the temperature of 120 ℃ for 4.5 hours.
Comparative example 1
Similar to example 3, but 5g/L sodium hypophosphite.
Comparative example 2
Similar to example 3, but without sodium lauryl sulfate.
Comparative example 3
Similar to example 3, but the electroless plating was stable at 90 ℃.
Performance testing
1. And (3) testing the appearance of the plating layer: the surface quality of the front and rear mold inserts plated in example 3 and comparative examples 1, 2 and 3 was observed, and if the front and rear mold inserts were plated completely without any plating or without any holes, the mold insert was judged to be acceptable, otherwise, if one mold insert was plated without any plating or with any holes, the mold insert was judged to be unacceptable. The results are shown in Table 1.
2. And (3) corrosion resistance test: the front and rear mold inserts of example 3 and comparative examples 1, 2 and 3 were subjected to a salt spray test using a 5% by mass NaCl solution; the temperature is set to 35 ℃; the pH value is 6.5; the settling amount of the salt spray is 2ml/80cm2H; the duration of the test was 48 h. Observing the plating layer, if the front and back mould cores are not oxidized, fall off, fade, rust and corrosion, marking as qualified, otherwise, only one mould core is oxidized, fall off, fade, rust and corrosionIf yes, the result is recorded as fail. The results are shown in Table 1.
TABLE 1
Examples Appearance of plating layer Corrosion resistance
Example 3 Qualified Qualified
Comparative example 1 Qualified Fail to be qualified
Comparative example 2 Fail to be qualified Fail to be qualified
Comparative example 3 Fail to be qualified Fail to be qualified
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a oxyhydrogen atomizer casing injection mold which characterized in that: comprises a panel (1), a sprue bush (2), a front template (3), a front mold core (4), a rear mold core (5), a rear template (6), a first slide block (71), a second slide block (72) and a rear mold base (8);
the panel (1), the front template (3), the front mold core (4), the rear mold core (5), the rear template (6) and the rear mold base (8) are sequentially arranged; the front mold core (4) and the rear mold core (5) are arranged oppositely up and down, the front mold core (4) is matched on the front template (3), and the rear mold core (5) is matched on the rear template (6); the first sliding block (71) and the second sliding block (72) are horizontally arranged oppositely and are respectively arranged between the front template (3) and the rear template (6); the rear template (6) is matched with the rear die holder (8) through a guide post (83).
2. An oxyhydrogen atomizer housing injection mold according to claim 1, characterized in that: the front die core (4), the rear die core (5), the first sliding block (71) and the second sliding block (72) enclose a hydrogen-oxygen atomizer shell die cavity, a sprue bush (2) is arranged in the glue injection hole (38), and the sprue bush (2) penetrates through the front die core (4) and extends into the die cavity; an injection gate (11) is arranged on the panel (1), and the injection gate (11) is arranged corresponding to the gate sleeve (2).
3. An oxyhydrogen atomizer housing injection mold according to claim 2, characterized in that: and a front mold cooling pipe (35) is arranged on one surface of the front mold plate (3) matched with the front mold core (4), and the front mold cooling pipe (35) is connected into circulating cooling liquid through a front mold cooling port (32).
4. An oxyhydrogen atomizer housing injection mold according to claim 3, characterized in that: an inclined guide post (34) is further arranged on one surface, matched with the front mold core (4), of the front mold plate (3), and the inclined guide post (34) penetrates through the first sliding block (71) and the second sliding block (72) respectively to be positioned on the rear mold plate (6).
5. An oxyhydrogen atomizer housing injection mold according to claim 4, characterized in that: a front template positioning block (33) is further arranged on one surface of the front template (3) matched with the front mold core (4), and the front template positioning block (33) is matched with the rear template positioning groove (63).
6. An oxyhydrogen atomizer housing injection mold according to claim 2, characterized in that: and an exhaust groove (41) is formed in one surface of the front mold core (4) matched with the front template (3).
7. An oxyhydrogen atomizer housing injection mold according to claim 1, characterized in that: and a rear mold cooling pipe (62) is arranged on one surface of the rear mold plate (6) matched with the rear mold core (5), and the rear mold cooling pipe (62) is connected into circulating cooling liquid through a rear mold cooling port (64).
8. An oxyhydrogen atomizer housing injection mold according to claim 1, characterized in that: the rear die holder (8) comprises a bottom plate (84), and square irons (87) are vertically arranged on two sides of the bottom plate (84).
9. An oxyhydrogen atomizer housing injection mold according to claim 8, characterized in that: the bottom plate (84), the square iron (87) and the rear template (6) enclose a cavity, and an ejection assembly and a guide column (83) are arranged in the cavity.
10. An oxyhydrogen atomizer housing injection mold according to claim 9, characterized in that: the ejection assembly comprises an ejector pin bottom plate (85), an ejector pin panel (86), a support column (81) and an ejector pin (82); the upper part of the thimble (82) is arranged in the rear die core (5), the lower part of the thimble (82) is connected with a thimble panel (86), the thimble panel (86) is matched on a thimble base plate (85), and the thimble base plate (85) is matched on a base plate (84).
CN202110388903.1A 2021-04-12 2021-04-12 Oxyhydrogen atomizer casing injection mold Pending CN112895361A (en)

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