Preparation process of rubber passing ring and meson of high-glass-fiber halogen-free injection molding machine

Abstract

The invention discloses a preparation process of a rubber passing ring and a meson of a high glass fiber halogen-free injection molding machine, and particularly relates to the technical field of rubber passing ring and meson preparation. The metal ceramic slurry is prepared from the following raw materials in percentage by weight: 10.5 to 31.5 percent of polyethylene glycol, 5.0 to 25.5 percent of sodium alginate, 2.0 to 10.5 percent of sodium silicate, 0.5 to 5.9 percent of silane coupling agent, 0.01 to 0.10 percent of sodium polycarboxylate, 0.01 to 1.00 percent of NXZ defoaming agent, 23.5 to 38.5 percent of Mo powder, 1.6 to 4.8 percent of binary boride powder, 1.3 to 7.5 percent of Cr powder, 0.3 to 4.2 percent of V2B powder and 13.0 to 22.8 percent of Ni powder. The metal boride ceramic coating is formed on the whole surface of the rubber ring and the meson of the injection molding machine, and the metallographic structure of the ceramic coating is Ni-based solid solution + Mo2NiB2 ceramic, so that the corrosion resistance and the wear resistance of the surfaces of the rubber ring and the meson of the injection molding machine are synchronously improved, and compared with the prior art, the service life of the rubber ring and the meson of the injection molding machine is greatly prolonged in a high-glass-fiber halogen-free injection molding environment.

Description

Technical Field

[0001] The invention relates to the technical field of high-glass-fiber halogen-free injection molding machines, and in particular to a preparation process of a rubber ring and a meson of a high-glass-fiber halogen-free injection molding machine. Background Art

[0002] The rubber ring of the injection molding machine is an important component of the injection molding machine. Its main function is to prevent the plastic melt from leaking backwards during injection. It forms a closed structure by contacting with the rubber meson to prevent the plastic melt from leaking and ensure the precision and stability of the injection process. The rubber ring and rubber meson of the injection molding machine are both rocket head parts of the injection molding machine.

[0003] High glass fiber halogen-free plastic injection molding machine rocket head parts are subjected to high wear, high corrosion and high impact conditions at the same time. The life of the rocket head is very short. As the material of the rocket head parts, it needs to meet harsh conditions such as high strength, high impact toughness, high corrosion resistance and high wear resistance.

[0004] Traditional plastic mold steel, stainless steel, nickel-based alloys, etc. have certain corrosion resistance and severe wear, while high-speed steel, powder steel, etc. have higher wear resistance and severe corrosion. It is difficult for existing technologies to meet both high corrosion resistance and high wear resistance. Summary of the invention

[0005] The purpose of the present invention is to provide a preparation process for high-glass fiber halogen-free injection molding machine rubber rings and mesos, by forming a metal boride ceramic coating on the entire surface of the injection molding machine rubber rings and mesos, so that the surface corrosion resistance and wear resistance of the injection molding machine rubber rings and mesos are simultaneously improved. Compared with the prior art, the service life of the high-glass fiber halogen-free injection molding environment is greatly improved.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a preparation process of a high glass fiber halogen-free injection molding machine rubber ring and meson, the specific steps are as follows:

[0007] Step 1: Use mold steel as raw material to make the main part of the rubber ring and the meson. After mechanical processing and heat treatment, the main part of the rubber ring and the meson is processed to the designed size; the mold steel is 3Cr 13 , 4Cr 13 , 3Cr 2 Mo, 3Cr 17 Mo, 4Cr 2 Mn 1 MoS and other plastic mold steel, or 5CrNiMo, 4CrMnSiMoV, 4Cr 5 MoSv 1 Hot working die steel.

[0008] Step 2: The machined rubber ring and the meson are roughened by sandblasting;

[0009] Step 3: The treated rubber ring and the meson are dipped in the metal ceramic slurry, and then the slurry attached to the surface is dried;

[0010] Step 4: After drying, the rubber ring and the meson are vacuum sintered into shape;

[0011] Step 5: After sintering, the surface of the rubber ring and the pion is polished to complete the preparation.

[0012] Further, the raw materials used in the metal ceramic slurry in step 3 include, by percentage, 10.5-31.5% polyethylene glycol, 5.0-25.5% sodium alginate, 2.0-10.5% sodium silicate, 0.5-5.9% silane coupling agent, 0.01-0.10% sodium polycarboxylate, 0.01-1.00% NXZ defoamer, 23.5-38.5% Mo powder, 1.6-4.8% binary boride powder, 1.3-7.5% Cr powder, and V 2 B powder 0.3-4.2%, Ni powder 13.0-22.8%.

[0013] Furthermore, the raw materials used in the metal ceramic slurry include, by percentage, 31.5% polyethylene glycol, 5% sodium alginate, 2% sodium silicate, 5.9% silane coupling agent, 0.1% sodium polycarboxylate, 0.5% NXZ defoamer, 23.5% Mo powder, 4.8% binary boride powder, 7.5% Cr powder, and 1.5% V. 2 B powder 4.2%, Ni powder 15%.

[0014] Furthermore, the raw materials used in the metal ceramic slurry include, by percentage, 10.5% polyethylene glycol, 25.5% sodium alginate, 5% sodium silicate, 0.5% silane coupling agent, 0.1% sodium polycarboxylate, 0.5% NXZ defoamer, 38.5% Mo powder, 1.6% binary boride powder, 4.5% Cr powder, and 1.5% V. 2 B powder 0.3%, Ni powder 13%.

[0015] Furthermore, the raw materials used in the metal ceramic slurry include, by percentage, 22% polyethylene glycol, 10% sodium alginate, 10.5% sodium silicate, 2% silane coupling agent, 0.1% sodium polycarboxylate, 0.5% NXZ defoamer, 26.8% Mo powder, 2.4% binary boride powder, 1.3% Cr powder, and 1.5% V. 2 B powder 1.6%, Ni powder 22.8%.

[0016] Furthermore, the raw materials used in the metal ceramic slurry include, by percentage, 25% polyethylene glycol, 15% sodium alginate, 7.5% sodium silicate, 2% silane coupling agent, 0.1% sodium polycarboxylate, 0.5% NXZ defoamer, 26.8% Mo powder, 2.4% binary boride powder, 1.3% Cr powder, and 1.5% V. 2 B powder 1.6%, Ni powder 17.8%.

[0017] Further, the metal ceramic slurry in step three is subjected to step four to form Ni-Mo 2 NeB 2 The coating comprises Mo35.5-59.5%, B2.5-7.5%, Cr2.0-11.5%, V0.5-6.5% and the balance is Ni.

[0018] Furthermore, in step 4, the vacuum sintering process has a heating rate of 2-10°C / min, and is kept warm at 300°C, 600°C, 900°C, and 1100°C respectively, with a sintering temperature of 1100-1280°C. The sintering time and the holding time in step 4 are according to t=k*H, H is the part thickness in mm, and k is 20-60.

[0019] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0020] A metal boride ceramic coating is formed on the entire surface of the rubber ring and the meson of the injection molding machine. The metallographic structure of the ceramic coating is Ni-based solid solution + Mo 2 NeB 2 Ceramics can improve the corrosion resistance and wear resistance of the surface of the rubber rings and mesos of the injection molding machine. Compared with the rubber rings and mesos made of high-speed steel, their service life is increased by 5-10 times in the high-glass fiber halogen-free injection molding environment, which effectively solves the problem of short service life of the rubber rings and mesos. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the structure diagram of the rubber ring and meson of the present invention;

[0022] Figure 2 The metallographic structure diagram of the coating bonding interface of the present invention;

[0023] Figure 3 This is a distribution diagram of the coating interface hardness of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below.

[0025] Embodiment 1

[0026] The present invention provides a preparation process of a high glass fiber halogen-free injection molding machine rubber ring and a meson, and the specific steps are as follows:

[0027] Step 1: Use plastic mold steel as raw material to make the main part of the rubber ring and the meson, and process the main part of the rubber ring and the meson to the designed size through mechanical processing and heat treatment;

[0028] Step 2: The machined rubber ring and the meson are roughened by sandblasting;

[0029] Step 3: The treated rubber ring and the meson are dipped in the metal ceramic slurry, and then the slurry attached to the surface is dried; the raw materials used in the metal ceramic slurry include 31.5% polyethylene glycol, 5% sodium alginate, 2% sodium silicate, 5.9% silane coupling agent, 0.1% sodium polycarboxylate, 0.5% NXZ defoamer, 23.5% Mo powder, 4.8% binary boride powder, 7.5% Cr powder, V 2 B powder 4.2%, Ni powder 15%.

[0030] Step 4: After drying, the rubber ring and the meson are vacuum sintered. The vacuum sintering process is a heating rate of 2°C / min, and the temperature is kept at 300°C, 600°C, 900°C, and 1100°C respectively. The sintering temperature is 1100°C. The sintering time and the holding time are based on t=k*H, where H is the thickness of the part in mm and k is 20.

[0031] The metal ceramic slurry is vacuum sintered to form Ni-Mo 2 NeB 2 Coating, the coating composition includes Mo45%, B6.9%, Cr9.9%, V6.2%, and the rest is Ni;

[0032] Step 5: After sintering, the rubber ring and the meson are polished to prepare Figure 1 The rubber ring and meson shown.

[0033] Embodiment 2

[0034] The present invention provides a preparation process of a high glass fiber halogen-free injection molding machine rubber ring and a meson, and the specific steps are as follows:

[0035] Step 1: Use plastic mold steel as raw material to make the main part of the rubber ring and the meson, and process the main part of the rubber ring and the meson to the designed size through mechanical processing and heat treatment;

[0036] Step 2: The machined rubber ring and the meson are roughened by sandblasting;

[0037] Step 3: The treated rubber ring and the meson are dipped in the metal ceramic slurry, and then the slurry attached to the surface is dried; the raw materials used in the metal ceramic slurry include polyethylene glycol 10.5%, sodium alginate 25.5%, sodium silicate 5%, silane coupling agent 0.5%, sodium polycarboxylate 0.1%, NXZ defoamer 0.5%, Mo powder 38.5%, binary boride powder 1.6%, Cr powder 4.5%, V 2 B powder 0.3%, Ni powder 13%;

[0038] Step 4: After drying, the rubber ring and the meson are vacuum sintered. The vacuum sintering process is a heating rate of 5°C / min, and the temperature is kept at 300°C, 600°C, 900°C, and 1100°C respectively. The sintering temperature is 1160°C. The sintering time and the holding time are based on t=k*H, where H is the thickness of the part in mm, and k is 35.

[0039] The metal ceramic slurry is vacuum sintered to form Ni-Mo 2 NeB 2 Coating, the coating composition includes Mo59.3%, B2.6%, Cr4.8%, V0.9%, and the rest is Ni;

[0040] Step 5: After sintering, the rubber ring and the meson are polished to prepare Figure 1 The rubber ring and meson shown.

[0041] Embodiment 3

[0042] The present invention provides a preparation process of a high-glass fiber halogen-free injection molding machine rubber ring and a meson, and the specific steps are as follows:

[0043] Step 1: Use hot-working die steel as raw material to make the main part of the rubber ring and the meson, and process the main part of the rubber ring and the meson to the designed size through mechanical processing and heat treatment;

[0044] Step 2: The machined rubber ring and the meson are roughened by sandblasting;

[0045] Step 3: The treated rubber ring and meson are dipped in the metal ceramic slurry, and then the slurry attached to the surface is dried. The raw materials used in the metal ceramic slurry include 22% polyethylene glycol, 10% sodium alginate, 10.5% sodium silicate, 2% silane coupling agent, 0.1% sodium polycarboxylate, 0.5% NXZ defoamer, 26.8% Mo powder, 2.4% binary boride powder, 1.3% Cr powder, V 2 B powder 1.6%, Ni powder 22.8%;

[0046] Step 4: After drying, the rubber ring and the meson are vacuum sintered. The vacuum sintering process is a heating rate of 8°C / min, and the temperature is kept at 300°C, 600°C, 900°C, and 1100°C respectively. The sintering temperature is 1220°C. The sintering time and the holding time are based on t=k*H, H is the part thickness in mm, and k is 50.

[0047] The metal ceramic slurry is vacuum sintered to form Ni-Mo 2 NeB 2 The coating composition includes Mo 48.2%, B 3.6%, Cr 3.8%, V 3.6% and the rest is Ni.

[0048] Step 5: After sintering, the rubber ring and the meson are polished to prepare Figure 1 The rubber ring and meson shown.

[0049] Embodiment 4

[0050] The present invention provides a preparation process of a high-glass fiber halogen-free injection molding machine rubber ring and a meson, and the specific steps are as follows:

[0051] Step 1: Use hot-working die steel as raw material to make the main part of the rubber ring and the meson, and process the main part of the rubber ring and the meson to the designed size through mechanical processing and heat treatment;

[0052] Step 2: The machined rubber ring and the meson are roughened by sandblasting;

[0053] Step 3: The treated rubber ring and meson are dipped in metal ceramic slurry, and then the slurry attached to the surface is dried. The raw materials used in the metal ceramic slurry include 25% polyethylene glycol, 15% sodium alginate, 7.5% sodium silicate, 2% silane coupling agent, 0.1% sodium polycarboxylate, 0.5% NXZ defoamer, 26.8% Mo powder, 2.4% binary boride powder, 1.3% Cr powder, V 2 B powder 1.6%, Ni powder 17.8%;

[0054] Step 4: After drying, the rubber ring and the meson are vacuum sintered. The vacuum sintering process is a heating rate of 10°C / min, and the temperature is kept at 300°C, 600°C, 900°C, and 1100°C respectively. The sintering temperature is 1280°C. In step 4, the sintering time and the holding time are based on t=k*H, H is the thickness of the part, the unit is mm, and the value of k is 60;

[0055] The metal ceramic slurry is vacuum sintered to form Ni-Mo 2 NeB 2Coating, the coating composition includes Mo52.1%, B3.8%, Cr4.1%, V4.1% and the rest is Ni.

[0056] Step 5: After sintering, the rubber ring and the meson are polished to prepare Figure 1 The rubber ring and meson shown.

[0057] Taking the rubber ring as an example, four groups of rubber rings were selected, each group had 5 rubber rings, and the four groups of rubber rings were prepared by the processes of Examples 1, 2, 3, and 4 respectively. Another rubber ring made of high-speed steel was selected as a control group. The five groups were tested successively, and each group was tested under the same environment and conditions.

[0058] The surface hardness of each rubber ring in each group was tested, and the average hardness of each group was calculated. One individual was selected from each group and installed on the injection molding machine for high-intensity use. Its service life was calculated. After collating the data, the following table was obtained:

[0059] Hardness (HV) Service life (month) Control group 626 7 Embodiment 1 759 35 Embodiment 2 763 38 Embodiment 3 778 46 Embodiment 4 772 43

[0060] Figure 2 This is the metallographic structure diagram of the coating bonding interface. The metal ceramic is Mo 2 NeB 2 The white ceramic phase is evenly distributed on the Ni-based solid solution, and there is a transition layer between the mold stainless steel and the metal ceramic.

[0061] Figure 3 is the coating interface hardness distribution diagram, Ni-Mo 2 NeB 2 The average hardness of the metal ceramic coating is around HV700, and the coating is resistant to corrosion by hydrochloric acid, sulfuric acid, etc.

[0062] From the above data, we can see that a metal boride ceramic coating is formed on the entire surface of the injection molding machine's rubber rings and mesons. The metallographic structure of the ceramic coating is Ni-based solid solution + Mo2NiB2 ceramic, which improves the surface corrosion resistance and wear resistance of the injection molding machine's rubber rings and mesons. Compared with rubber rings and mesons made of high-speed steel, their service life is increased by 5-10 times, and their service life is greatly improved.

[0063] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A preparation process for high glass fiber halogen-free injection molding machine rubber ring and meson, characterized in that: The specific steps are as follows: Step 1: Use mold steel as raw material to make the main part of the rubber ring and the meson, and process the main part of the rubber ring and the meson to the designed size through mechanical processing and heat treatment; Step 2: The machined rubber ring and the meson are roughened by sandblasting; Step 3: The treated rubber ring and the meson are dipped in the metal ceramic slurry, and then the slurry attached to the surface is dried; Step 4: After drying, the rubber ring and the meson are vacuum sintered into shape; Step 5: After sintering, the surface of the rubber ring and the meson is polished to complete the preparation.

2. The process for preparing a high glass fiber halogen-free injection molding machine rubber ring and meson according to claim 1, characterized in that: The raw materials used in the metal ceramic slurry in step three include, by percentage, polyethylene glycol 10.5-31.5%, sodium alginate 5.0-25.5%, sodium silicate 2.0-10.5%, silane coupling agent 0.5-5.9%, sodium polycarboxylate 0.01-0.10%, NXZ defoamer 0.01-1.00%, Mo powder 23.5-38.5%, binary boride powder 1.6-4.8%, Cr powder 1.3-7.5%, V2B powder 0.3-4.2%, and Ni powder 13.0-22.8%.

3. The process for preparing a high glass fiber halogen-free injection molding machine rubber ring and meson according to claim 2, characterized in that: The raw materials used in the metal ceramic slurry include, by percentage, 31.5% polyethylene glycol, 5% sodium alginate, 2% sodium silicate, 5.9% silane coupling agent, 0.1% sodium polycarboxylate, 0.5% NXZ defoamer, 23.5% Mo powder, 4.8% binary boride powder, 7.5% Cr powder, 4.2% V2B powder, and 15% Ni powder.

4. The process for preparing a high glass fiber halogen-free injection molding machine rubber ring and meson according to claim 2, characterized in that: The raw materials used in the metal ceramic slurry include, by percentage, 10.5% polyethylene glycol, 25.5% sodium alginate, 5% sodium silicate, 0.5% silane coupling agent, 0.1% sodium polycarboxylate, 0.5% NXZ defoamer, 38.5% Mo powder, 1.6% binary boride powder, 4.5% Cr powder, 0.3% V2B powder, and 13% Ni powder.

5. The process for preparing a high glass fiber halogen-free injection molding machine rubber ring and meson according to claim 2, characterized in that: The raw materials used in the metal ceramic slurry include, by percentage, 22% polyethylene glycol, 10% sodium alginate, 10.5% sodium silicate, 2% silane coupling agent, 0.1% sodium polycarboxylate, 0.5% NXZ defoamer, 26.8% Mo powder, 2.4% binary boride powder, 1.3% Cr powder, 1.6% V2B powder, and 22.8% Ni powder.

6. The process for preparing a high glass fiber halogen-free injection molding machine rubber ring and meson according to claim 2, characterized in that: The raw materials used in the metal ceramic slurry include, by percentage, 25% polyethylene glycol, 15% sodium alginate, 7.5% sodium silicate, 2% silane coupling agent, 0.1% sodium polycarboxylate, 0.5% NXZ defoamer, 26.8% Mo powder, 2.4% binary boride powder, 1.3% Cr powder, 1.6% V2B powder, and 17.8% Ni powder.

7. The process for preparing a high glass fiber halogen-free injection molding machine rubber ring and meson according to claim 2, characterized in that: The metal ceramic slurry in step three forms a Ni-Mo2NiB2 coating after step four. The coating composition includes Mo35.5-59.5%, B2.5-7.5%, Cr2.0-11.5%, V0.5-6.5%, and the balance is Ni.

8. The process for preparing a high glass fiber halogen-free injection molding machine rubber ring and meson according to claim 1, characterized in that: The vacuum sintering process in step 4 is a heating rate of 2-10°C / min, and the heat preservation is performed at 300°C, 600°C, 900°C, and 1100°C respectively, and the sintering temperature is 1100-1280°C. The sintering time and the heat preservation time in step 4 are according to t=k*H, H is the part thickness in mm, and k is 20-60.

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