阅读说明：本技术 一种高光显示器背板边框高光无痕注塑成型工艺 (Highlight traceless injection molding process for frame of back plate of highlight display ) 是由 周宏� 江艳 于 2021-07-12 设计创作，主要内容包括：本发明公开了一种高光显示器背板边框高光无痕注塑成型工艺,本发明涉及注塑技术领域,包括开模、物料处理、模具预热、合模升温、注塑成型、模具冷却、开模取件,将注塑材料放入到注塑机中,使注塑机将材料注塑到模具中,注塑机对材料输送的过程中,对注塑机上输送的位置进行加热处理,保证输送的内部温度在125℃范围内。该工艺通过在注塑机注塑的过程中,对注塑机输送的位置进行加热处理,能够保证输送的材料始终保持融化状态,当材料注入到模具后,利用振动机的振动,能够将模具中的材料给摇晃均匀,使材料充分的融入到模具内部各个位置,且保证材料的均匀性,这样生产出来的模具会更加的平整,提高了模具成型的质量。(The invention discloses a highlight traceless injection molding process for a frame of a back plate of a highlight display, which relates to the technical field of injection molding and comprises the steps of mold opening, material treatment, mold preheating, mold closing and temperature rising, injection molding, mold cooling, mold opening and part taking, wherein an injection molding material is put into an injection molding machine, so that the injection molding machine injects the material into a mold, and the injection molding machine carries out heating treatment on a conveying position on the injection molding machine in the material conveying process, so that the conveyed internal temperature is ensured to be within the range of 125 ℃. This technology is through the in-process of moulding plastics at the injection molding machine, carries out heat treatment to the position that the injection molding machine carried, can guarantee that the material of carrying remains the state of melting all the time, after the material pours into the mould into, utilizes the vibration of bobbing machine, can give the material in the mould to rock evenly, makes the abundant each position of melting into the mould of material, and guarantees the homogeneity of material, and the mould that produces like this can be more level and smooth, has improved the fashioned quality of mould.)

1. The highlight traceless injection molding process for the frame of the back plate of the highlight display is characterized by comprising the following steps of:

s1, opening the mould: measuring the size of a display frame, processing an injection mold matched with the display frame according to the size and the shape of the display frame, arranging a conformal water channel close to a cavity in the mold, and after the mold is processed, performing mold testing treatment on the mold until the mold is qualified, so that a subsequent injection molding process can be performed;

s2, material processing: taking a rotational flowing material as an injection molding material, putting the injection molding material into a condenser, condensing at the temperature of 4-12 ℃, wherein the condensing time is 30-45 min, after the condensing is finished, putting the injection molding material into a drying box for drying treatment, so that the humidity of the injection molding material is in the range of 0.2-0.4%, and then putting the injection molding material into microwave equipment, wherein the humidity of the injection molding material is less than 0.01%;

s3, preheating a die: fixing the qualified die tested in the step S1 on an injection molding machine, placing a die shell in a vessel filled with water, heating the water in the vessel to the temperature of 85-100 ℃, and preheating the die in a water bath, wherein the preheating and heat preservation time is 1-2.4 h at the temperature;

s4, mold closing and temperature rising: after the mold is preheated, introducing heat flow gas into the mold, wherein the temperature of the heat flow gas is 125-136 ℃, and the temperature in the mold reaches the temperature of the transformation of the injection molding material;

s5, injection molding: placing an injection molding material into an injection molding machine, enabling the injection molding machine to inject the material into a mold, heating a conveying position on the injection molding machine by the injection molding machine in a material conveying process, ensuring that the conveyed internal temperature is within the range of 125-136 ℃, taking out the injection molded mold after injection molding is finished, placing the injection molded mold into a vibrating machine, fixing the mold, enabling the vibrating machine to drive the mold to vibrate, uniformly shaking the material in the mold, filling heat flow gas into the vibrating machine, heating the heat flow gas, keeping the temperature of the heat flow gas within the range of 130-145 ℃, enabling the vibrating machine to vibrate the mold for 3-5 min, and ensuring that the material inside the mold is uniformly fused;

s6, cooling the die: taking out the mould after the vibration is finished, putting the mould into a water bath pool, carrying out water bath cooling, wherein the water bath temperature is 2-8 ℃, then injecting 3-6 ℃ water into the mould by using a pump, carrying out secondary cooling treatment on the mould, then discharging the cooling water in the mould, introducing 25-30 ℃ drying gas into the mould, putting the mould into a drying furnace for drying at 50-60 ℃, and after the drying is finished, putting the mould into the 2-8 ℃ water bath pool for cooling treatment, wherein the cooling time is 5-10 min;

s7, opening the die to take out: and after the mold is opened, taking out the formed mold, blowing gas to the surface of the forming mold, and blowing off dust attached to the surface of the forming mold to finally obtain the formed frame of the back plate of the highlight display.

2. The highlight-traceless injection molding process for the back plate frame of the highlight display according to claim 1, wherein the molding process comprises the following steps: in step S1, if the mold fails during the test, a new mold is newly produced.

3. The highlight-traceless injection molding process for the back plate frame of the highlight display according to claim 1, wherein the molding process comprises the following steps: in the step S2, the flowable material is one of PC, ABS/PC, PC/PMMA, PMMA/ABS, PC/GF and high-gloss ABS material.

4. The highlight-traceless injection molding process for the back plate frame of the highlight display according to claim 1, wherein the molding process comprises the following steps: in the step S2, when the injection molding material is dried, the drying temperature is 75-92 ℃.

5. The highlight-traceless injection molding process for the back plate frame of the highlight display according to claim 1, wherein the molding process comprises the following steps: in the step S3, when the water in the vessel is heated, the heating temperature is increased at a rate of 1-3 ℃/min.

6. The highlight-traceless injection molding process for the back plate frame of the highlight display according to claim 1, wherein the molding process comprises the following steps: in the step S5, when the injection molding machine injects the material into the mold, the injection advancing speed is 60-100 mm/S.

7. The highlight-traceless injection molding process for the back plate frame of the highlight display according to claim 1, wherein the molding process comprises the following steps: in the step S6, the water bath time is 10-15 min, the secondary cooling time is 15-20 min, and the drying time is 10-14 min.

8. The highlight-traceless injection molding process for the back plate frame of the highlight display according to claim 1, wherein the molding process comprises the following steps: in the step S7, the pressure of the mold dust is 0.3-0.8 MPa.

Technical Field

The invention relates to the technical field of injection molding, in particular to a highlight traceless injection molding process for a frame of a back plate of a highlight display.

Background

The highlight non-trace injection molding process is also called as a rapid thermal cycle injection molding process or a spraying-free highlight non-trace injection molding process, and any shape of the surface of a mold can be well copied by using the process, so that the surface of a product piece has no melting trace, no flow trace, no streamline and no sink mark; the surface is high in gloss, so that a mirror surface effect is achieved; the strength and the surface hardness of the plastic part are improved; the thin wall is formed, so that the injection molding fluidity is improved, and the product quality and strength are improved; the thick wall molding injection molding period is reduced by over 60 percent.

However, in the existing highlight traceless injection molding process, the processed mold is not perfect and smooth enough due to insufficient mold fusion, so that the production quality of the mold is reduced, and the defect is not correspondingly improved.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a highlight traceless injection molding process for a frame of a back plate of a highlight display, which solves the problem that in the existing highlight traceless injection molding process, because the mold is not sufficiently blended, the processed mold is not perfect and smooth, and the production quality of the mold is further reduced.

In order to achieve the purpose, the invention is realized by the following technical scheme: a highlight traceless injection molding process for a highlight display backboard frame comprises the following steps:

s1, opening the mould: measuring the size of a display frame, processing an injection mold matched with the display frame according to the size and the shape of the display frame, arranging a conformal water channel close to a cavity in the mold, and after the mold is processed, performing mold testing treatment on the mold until the mold is qualified, so that a subsequent injection molding process can be performed;

s2, material processing: taking a rotational flowing material as an injection molding material, putting the injection molding material into a condenser, condensing at the temperature of 4-12 ℃, wherein the condensing time is 30-45 min, after the condensing is finished, putting the injection molding material into a drying box for drying treatment, so that the humidity of the injection molding material is in the range of 0.2-0.4%, and then putting the injection molding material into microwave equipment, wherein the humidity of the injection molding material is less than 0.01%;

s3, preheating a die: fixing the qualified die tested in the step S1 on an injection molding machine, placing a die shell in a vessel filled with water, heating the water in the vessel to the temperature of 85-100 ℃, and preheating the die in a water bath, wherein the preheating and heat preservation time is 1-2.4 h at the temperature;

s4, mold closing and temperature rising: after the mold is preheated, introducing heat flow gas into the mold, wherein the temperature of the heat flow gas is 125-136 ℃, and the temperature in the mold reaches the temperature of the transformation of the injection molding material;

s5, injection molding: placing an injection molding material into an injection molding machine, enabling the injection molding machine to inject the material into a mold, heating a conveying position on the injection molding machine by the injection molding machine in a material conveying process, ensuring that the conveyed internal temperature is within the range of 125-136 ℃, taking out the injection molded mold after injection molding is finished, placing the injection molded mold into a vibrating machine, fixing the mold, enabling the vibrating machine to drive the mold to vibrate, uniformly shaking the material in the mold, filling heat flow gas into the vibrating machine, heating the heat flow gas, keeping the temperature of the heat flow gas within the range of 130-145 ℃, enabling the vibrating machine to vibrate the mold for 3-5 min, and ensuring that the material inside the mold is uniformly fused;

s6, cooling the die: taking out the mould after the vibration is finished, putting the mould into a water bath pool, carrying out water bath cooling, wherein the water bath temperature is 2-8 ℃, then injecting 3-6 ℃ water into the mould by using a pump, carrying out secondary cooling treatment on the mould, then discharging the cooling water in the mould, introducing 25-30 ℃ drying gas into the mould, putting the mould into a drying furnace for drying at 50-60 ℃, and after the drying is finished, putting the mould into the 2-8 ℃ water bath pool for cooling treatment, wherein the cooling time is 5-10 min;

s7, opening the die to take out: and after the mold is opened, taking out the formed mold, blowing gas to the surface of the forming mold, and blowing off dust attached to the surface of the forming mold to finally obtain the formed frame of the back plate of the highlight display.

Preferably, in step S1, if the mold fails in the test, a new mold is newly produced.

Preferably, in step S2, the flowable material is one of PC, ABS/PC, PC/PMMA, PMMA/ABS, PC/GF and high-gloss ABS material.

Preferably, in the step S2, the drying temperature of the injection molding material is 75 to 92 ℃.

Preferably, in the step S3, when the water in the dish is heated, the heating temperature is increased at a rate of 1 to 3 ℃/min.

Preferably, in step S5, when the injection molding machine injects the material into the mold, the injection advancing speed is 60 to 100 mm/S.

Preferably, in the step S6, the water bath time is 10-15 min, the secondary cooling time is 15-20 min, and the drying time is 10-14 min.

Preferably, in the step S7, the pressure of the gas for treating the mold dust is 0.3 to 0.8 MPa.

Advantageous effects

The invention provides a highlight traceless injection molding process for a frame of a back plate of a highlight display. Compared with the prior art, the method has the following beneficial effects:

1. this no trace injection moulding technology of highlight display backplate frame highlight, through the in-process of moulding plastics at the injection molding machine, carry out heat treatment to the position that the injection molding machine carried, the material that can guarantee to carry remains throughout to melt the state, after the material injected into the mould, utilize the vibration of bobbing machine, can give the material in the mould to rock evenly, make the abundant each position of melting into the mould of material, and guarantee the homogeneity of material, the mould of producing like this can be more level and smooth, the fashioned quality of mould has been improved.

2. This no trace injection moulding technology of highlight display backplate frame highlight can guarantee the homogeneity that the mould was heated through water bath to mould preheating treatment, and when the mould cools off, carries out multistage cooling, makes the cooling that the mould gradually to guaranteed the fashioned effect of mould cooling, and then the mould quality that makes the shaping come out is better.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides two technical solutions:

example one

A highlight traceless injection molding process for a highlight display backboard frame comprises the following steps:

s1, opening the mould: measuring the size of a display frame, processing an injection mold matched with the display frame according to the size and the shape of the display frame, arranging a conformal water channel close to a cavity in the mold, and after the mold is processed, performing mold testing treatment on the mold until the mold is qualified, so that a subsequent injection molding process can be performed;

s2, material processing: rotating the flowable material to serve as an injection molding material, putting the injection molding material into a condenser, condensing at the temperature of 4 ℃, wherein the condensing time is 30min, after the condensing, putting the injection molding material into a drying box for drying treatment to enable the humidity of the injection molding material to be within 0.2%, and then putting the injection molding material into microwave equipment, wherein the humidity of the injection molding material is less than 0.01%;

s3, preheating a die: fixing the qualified die tested in the step S1 on an injection molding machine, placing a die shell in a vessel filled with water, heating the water in the vessel to a temperature range of 85 ℃ so as to preheat the die in a water bath, and keeping the preheating and heat preservation time at the temperature for 1 h;

s4, mold closing and temperature rising: after the mold is preheated, introducing heat flow gas into the mold, wherein the temperature of the heat flow gas is 125 ℃, and the temperature in the mold reaches the temperature of the transformation of the injection molding material;

s5, injection molding: placing an injection molding material into an injection molding machine, enabling the injection molding machine to inject the material into a mold, heating a conveying position on the injection molding machine by the injection molding machine in a material conveying process, ensuring that the conveyed internal temperature is within 125 ℃, taking out the injection molded mold after injection molding, placing the injection molded mold into a vibrating machine, fixing the mold, enabling the vibrating machine to drive the mold to vibrate, enabling the material in the mold to be uniformly shaken, filling heat flow gas into the vibrating machine, heating the heat flow gas, keeping the temperature of the heat flow gas within 130 ℃, enabling the vibrating time of the vibrating machine to the mold to be 3, and ensuring that the material in the mold is uniformly fused;

s6, cooling the die: taking out the mould after the vibration is finished, putting the mould into a water bath pool, carrying out water bath cooling, wherein the water bath temperature is 2 ℃, then injecting 3 ℃ water into the mould by using a pump, carrying out secondary cooling treatment on the mould, then discharging the cooling water in the mould, introducing 25 ℃ drying gas into the mould, putting the mould into a drying furnace, drying at the drying temperature of 50 ℃, and after the drying is finished, putting the mould into the 2 ℃ water bath pool for cooling treatment, wherein the cooling time is 5 min;

s7, opening the die to take out: and after the mold is opened, taking out the formed mold, blowing gas to the surface of the forming mold, and blowing off dust attached to the surface of the forming mold to finally obtain the formed frame of the back plate of the highlight display.

In the embodiment of the present invention, in step S1, if the mold fails in the mold test, a new mold is newly manufactured.

In the embodiment of the present invention, in step S2, the flowable material is PC.

In the present example, in step S2, the drying temperature was 75 ℃ when the casting material was dried.

In the embodiment of the present invention, in step S3, when the water in the dish is heated, the heating temperature is increased at a rate of 1 ℃/min.

In the embodiment of the invention, in the step S5, when the injection molding machine injects the material into the mold, the injection advancing speed is 60 mm/S.

In the embodiment of the invention, in the step S6, the water bath time is 10min, the secondary cooling time is 15min, and the drying time is 10 min.

In the embodiment of the present invention, in step S7, the pressure of the gas for processing the mold dust is 0.3 MPa.

Example two

A highlight traceless injection molding process for a highlight display backboard frame comprises the following steps:

s1, opening the mould: measuring the size of a display frame, processing an injection mold matched with the display frame according to the size and the shape of the display frame, arranging a conformal water channel close to a cavity in the mold, and after the mold is processed, performing mold testing treatment on the mold until the mold is qualified, so that a subsequent injection molding process can be performed;

s2, material processing: rotating the flowable material to serve as an injection molding material, putting the injection molding material into a condenser, condensing at the temperature of 12 ℃, wherein the condensing time is 45min, after the condensing is finished, putting the injection molding material into a drying box for drying treatment, so that the humidity of the injection molding material is within 0.4%, and then putting the injection molding material into microwave equipment, wherein the humidity of the injection molding material is less than 0.01%;

s3, preheating a die: fixing the qualified die tested in the step S1 on an injection molding machine, placing a die shell in a vessel filled with water, heating the water in the vessel to heat the water to a temperature range of 100 ℃ so as to preheat the die in a water bath, and at the temperature, preheating and preserving the heat for 2.4 hours;

s4, mold closing and temperature rising: after the mold is preheated, introducing heat flow gas into the mold, wherein the temperature of the heat flow gas is 136 ℃, and the temperature in the mold reaches the temperature of the transformation of the injection molding material;

s5, injection molding: placing an injection molding material into an injection molding machine, enabling the injection molding machine to inject the material into a mold, heating a conveying position on the injection molding machine by the injection molding machine in the material conveying process, ensuring that the conveyed internal temperature is within 136 ℃, taking out the injection molded mold after injection molding is finished, placing the injection molded mold into a vibrating machine, fixing the mold, enabling the vibrating machine to drive the mold to vibrate, enabling the material in the mold to be uniformly shaken, filling heat flow gas into the vibrating machine, heating the heat flow gas, enabling the temperature of the heat flow gas to be within 145 ℃, enabling the vibrating time of the vibrating machine to the mold to be 5min, and ensuring that the material in the mold is uniformly fused;

s6, cooling the die: taking out the mould after the vibration is finished, putting the mould into a water bath pool, carrying out water bath cooling, wherein the water bath temperature is 8 ℃, then injecting 6 ℃ water into the mould by using a pump, carrying out secondary cooling treatment on the mould, then discharging the cooling water in the mould, introducing 30 ℃ drying gas into the mould, putting the mould into a drying furnace, drying at 60 ℃, and after the drying is finished, putting the mould into the 8 ℃ water bath pool for cooling treatment, wherein the cooling time is 10 min;

s7, opening the die to take out: and after the mold is opened, taking out the formed mold, blowing gas to the surface of the forming mold, and blowing off dust attached to the surface of the forming mold to finally obtain the formed frame of the back plate of the highlight display.

In the embodiment of the present invention, in step S1, if the mold fails in the mold test, a new mold is newly manufactured.

In the embodiment of the present invention, in step S2, the flowable material is ABS/PC.

In the present example, in step S2, the drying temperature was 92 ℃ when the casting material was dried.

In the embodiment of the present invention, in step S3, when the water in the dish is heated, the heating temperature is increased at a rate of 3 ℃/min.

In the embodiment of the invention, in the step S5, when the injection molding machine injects the material into the mold, the injection advancing speed is 100 mm/S.

In the embodiment of the invention, in the step S6, the water bath time is 15min, the secondary cooling time is 20min, and the drying time is 14 min.

In the embodiment of the present invention, in step S7, the pressure of the gas for processing the mold dust is 0.8 MPa.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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.