A mold release agent for a stainless steel ball stamping die and a preparation method thereof

Abstract

The present application relates to the technical field of release agents, and specifically discloses a release agent for a stainless steel ball stamping die and a preparation method thereof. The release agent for the stainless steel ball stamping die comprises the following raw materials in parts by weight: 40-80 parts of chlorinated paraffin; 5-9 parts of oxalic acid; 8-16 parts of washing powder; 10-20 parts of sodium nitrite; 90-150 parts of water; 4-16 parts of dispersant; 10-20 parts of water-retaining component; the water-retaining body comprises a highly water-soluble water-absorbing resin and a water-retaining body; and its preparation method comprises the following preparation steps: (1) solid mixing; (2) secondary stirring; (3) blending: mixing the secondary stirring mixture in step (2) and the remaining half of the mass of water at a speed of 400-600r / min to obtain the release agent for the stainless steel ball stamping die. The release agent of the present application can improve the stability of the release agent, make the release agent less likely to be delaminated, and improve the demoulding effect; in addition, the preparation method of the present application has the advantages of simple operation and wide application.

Description

Technical Field

[0001] The present application relates to the field of mold release agents, and more specifically, to a mold release agent for a stainless steel ball stamping die and a preparation method thereof. Background Art

[0002] Die casting, also known as pressure casting, is a process in which liquid or semi-liquid metal is forced to fill the die cavity at a high speed under high pressure, forming and solidifying under pressure to produce a casting. To facilitate the removal of the casting from the mold, a release agent is sprayed onto the inner surface of the die cavity to form a thin film. This prevents sticking, improves the metal's formability, and enhances the quality of the die-cast part.

[0003] A release agent is a functional substance that sits between the mold and the finished product. It is an important auxiliary material for obtaining high-quality die-castings. The surface quality, internal quality, and mold life of die-castings are all closely related to the release agent. There are three main types of release agents: oil-based, water-based, and solid powder. In recent years, with the development of die-casting technology, die-castings have become larger and more complex in structure, and the quality requirements for release agents for stainless steel ball stamping molds have become increasingly higher. Currently, water-based release agents are used in the largest amount for die-casting. Generally, base oil, lubricant, and water are emulsified using surfactants, and various additives are added. However, the release agents used in related technologies are not very stable and are prone to stratification, resulting in poor demolding effects. Summary of the Invention

[0004] In order to improve the stability of the release agent, make the release agent less likely to delaminate, and improve the demoulding effect, the present application provides a release agent for a stainless steel ball stamping die and a preparation method thereof.

[0005] In a first aspect, the present application provides a release agent for a stainless steel ball stamping die, which adopts the following technical solution:

[0006] A release agent for a stainless steel ball stamping die comprises the following raw materials in parts by weight:

[0007] 40-80 parts of chlorinated paraffin;

[0008] 5-9 parts of oxalic acid;

[0009] 8-16 parts laundry detergent;

[0010] 10-20 parts of sodium nitrite;

[0011] 90-150 parts water;

[0012] 4-16 parts of dispersant;

[0013] 10-20 parts of water-retaining component; the water-retaining body includes a highly water-soluble water-absorbing resin and a water-retaining body.

[0014] Preferably, a release agent for a stainless steel ball stamping die comprises the following raw materials in parts by weight:

[0015] 60 parts of chlorinated paraffin;

[0016] 7 parts of oxalic acid;

[0017] 12 parts laundry detergent;

[0018] 15 parts of sodium nitrite;

[0019] 120 parts water;

[0020] 10 parts of dispersant;

[0021] 15 parts of water-retaining components.

[0022] Preferably, the water retaining body comprises a porous silicon water retaining body, and the porous silicon water retaining body is made by the following method:

[0023] (1) After mixing 10-20 parts of water and 5-15 parts of hexadecyltrimethylammonium bromide by weight, 4-8 parts of silica sol and 2-8 parts of silane coupling agent were added, and the mixture was stirred until a light blue solution appeared to obtain a reaction solution;

[0024] (2) mixing the reaction solution of step (1) and an aqueous ammonia solution with a mass fraction of 2%-6% in a mass ratio of (5-15):(1-6), stirring, and aging at 45-55°C for 20-28h to obtain an aged product;

[0025] (3) The aged body in step (2) is dried at 60-80°C for 20-30 minutes and then ground to obtain a porous water-retaining silicon body.

[0026] Preferably, the stirring speed in step (2) is 700 r / min.

[0027] Preferably, the dispersant includes cetyltrimethylammonium bromide or cetyltrimethylammonium chloride.

[0028] In a second aspect, the present application provides a method for preparing a release agent for a stainless steel ball stamping die, using the following technical solution:

[0029] A method for preparing a release agent for a stainless steel ball stamping die comprises the following steps:

[0030] (1) Solid mixing: According to the formula, the washing powder, sodium nitrite and water retaining agent are mixed and stirred at a speed of 200-300 r / min to obtain a primary mixture;

[0031] (2) Secondary stirring: according to the formula, chlorinated paraffin, oxalic acid, dispersant, the primary mixture in step (1) and half the mass of water are mixed and stirred at a speed of 300-400 r / min to obtain a secondary stirring mixture;

[0032] (3) Blending: The secondary stirred mixture in step (2) and the remaining half of the mass of water are mixed and stirred at a speed of 400-600 r / min to obtain a release agent for a stainless steel ball stamping die.

[0033] In summary, the present application has the following beneficial effects: in the present application, laundry detergent serves as a surfactant, sodium nitrite serves as a metal heat treatment agent and has the function of inhibiting steel corrosion, which can protect steel molds; the dispersant helps to disperse the raw materials to form a uniform and stable release agent; secondly, a water-retaining component is added to the present application, which can make it difficult for the raw materials to separate from water, and thus difficult to stratify, thereby improving the stability of the release agent and thereby improving the release effect. DETAILED DESCRIPTION

[0034] The present application is further described in detail below with reference to the embodiments.

[0035] Preparation example of water-retaining body

[0036] Preparation Example 1:

[0037] (1) After mixing 10 kg of water and 5 kg of hexadecyltrimethylammonium bromide, 4 kg of silica sol and 2 kg of silane coupling agent were added, and the mixture was stirred until a light blue solution appeared to obtain a reaction solution;

[0038] (2) The reaction solution of step (1) and a 2% ammonia aqueous solution are mixed in a mass ratio of (5-15): (1-6), stirred, and aged at 45°C for 20 hours to obtain an aged product; the stirring speed of the stirring treatment is 500 r / min.

[0039] (3) The aged body in step (2) is dried at 60° C. for 20 min and then ground to obtain a porous water-retaining silicon body.

[0040] Preparation Example 2:

[0041] (1) After mixing 15 kg of water and 10 kg of hexadecyltrimethylammonium bromide, add 6 kg of silica sol and 5 kg of silane coupling agent, and continue stirring until a light blue solution appears to be obtained to obtain a reaction solution;

[0042] (2) The reaction solution of step (1) and a 4% ammonia aqueous solution were mixed in a mass ratio of (5-15): (1-6), stirred, and aged at 50°C for 24 hours to obtain an aged product; the stirring speed of the stirring treatment was 500 r / min.

[0043] (3) The aged body in step (2) is dried at 70° C. for 25 min and then ground to obtain a porous water-retaining silicon body.

[0044] Preparation Example 3:

[0045] (1) After mixing 20 kg of water and 15 kg of hexadecyltrimethylammonium bromide, 8 kg of silica sol and 8 kg of silane coupling agent were added and stirred until a light blue solution appeared to obtain a reaction solution;

[0046] (2) The reaction solution of step (1) and a 6% ammonia aqueous solution were mixed in a mass ratio of (5-15): (1-6), stirred, and aged at 55°C for 28 hours to obtain an aged product; the stirring speed of the stirring treatment was 500 r / min.

[0047] (3) The aged body in step (2) is dried at 80° C. for 30 min and then ground to obtain a porous water-retaining silicon body.

[0048] Preparation Example 4:

[0049] The difference between this preparation example and preparation example 2 is that the stirring speed of the stirring treatment in step (2) of this preparation example is 700 r / min. Example

[0050] Example 1

[0051] A mold release agent for a stainless steel ball stamping die comprises the following raw materials by weight: 40 kg of chlorinated paraffin, 5 kg of oxalic acid, 8 kg of washing powder, 10 kg of sodium nitrite, 90 kg of water, 4 kg of a dispersant, and 10 kg of a water-retaining component; the water-retaining body comprises a highly water-soluble water-absorbing resin and a water-retaining body mixed in a mass ratio of 1:2, wherein the water-retaining body is the water-retaining body described in Preparation Example 1; and the dispersant is cetyltrimethyl quaternary ammonium bromide.

[0052] A method for preparing a release agent for a stainless steel ball stamping die comprises the following steps:

[0053] (1) Solid mixing: According to the formula, washing powder, sodium nitrite and water-retaining agent are mixed and stirred at a speed of 200 r / min to obtain a primary mixture;

[0054] (2) Secondary stirring: according to the formula, chlorinated paraffin, oxalic acid, dispersant, the primary mixture in step (1) and half the mass of water are mixed and stirred at a speed of 300 r / min to obtain a secondary stirring mixture;

[0055] (3) Blending: The secondary stirred mixture in step (2) and the remaining half of the mass of water are mixed and stirred at a speed of 400 r / min to obtain a release agent for a stainless steel ball stamping die.

[0056] Example 2

[0057] A mold release agent for a stainless steel ball stamping die comprises the following raw materials by weight: 60 kg of chlorinated paraffin, 7 kg of oxalic acid, 12 kg of washing powder, 15 kg of sodium nitrite, 120 kg of water, 12 kg of a dispersant, and 15 kg of a water-retaining component; the water-retaining body comprises a highly water-soluble water-absorbing resin and a water-retaining body mixed in a mass ratio of 1:2, wherein the water-retaining body is the water-retaining body described in Preparation Example 1; and the dispersant is cetyltrimethyl quaternary ammonium bromide.

[0058] A method for preparing a release agent for a stainless steel ball stamping die comprises the following steps:

[0059] (1) Solid mixing: According to the formula, washing powder, sodium nitrite and water-retaining agent are mixed and stirred at a speed of 200 r / min to obtain a primary mixture;

[0060] (2) Secondary stirring: according to the formula, chlorinated paraffin, oxalic acid, dispersant, the primary mixture in step (1) and half the mass of water are mixed and stirred at a speed of 300 r / min to obtain a secondary stirring mixture;

[0061] (3) Blending: The secondary stirred mixture in step (2) and the remaining half of the mass of water are mixed and stirred at a speed of 400 r / min to obtain a release agent for a stainless steel ball stamping die.

[0062] Example 3

[0063] A mold release agent for a stainless steel ball stamping die comprises the following raw materials by weight: 80 kg of chlorinated paraffin, 9 kg of oxalic acid, 16 kg of washing powder, 20 kg of sodium nitrite, 150 kg of water, 16 kg of a dispersant, and 20 kg of a water-retaining component; the water-retaining body comprises a highly water-soluble water-absorbing resin and a water-retaining body mixed in a mass ratio of 1:2, wherein the water-retaining body is the water-retaining body described in Preparation Example 1; and the dispersant is cetyltrimethyl quaternary ammonium bromide.

[0064] A method for preparing a release agent for a stainless steel ball stamping die comprises the following steps:

[0065] (1) Solid mixing: According to the formula, washing powder, sodium nitrite and water-retaining agent are mixed and stirred at a speed of 200 r / min to obtain a primary mixture;

[0066] (2) Secondary stirring: according to the formula, chlorinated paraffin, oxalic acid, dispersant, the primary mixture in step (1) and half the mass of water are mixed and stirred at a speed of 300 r / min to obtain a secondary stirring mixture;

[0067] (3) Blending: The secondary stirred mixture in step (2) and the remaining half of the mass of water are mixed and stirred at a speed of 400 r / min to obtain a release agent for a stainless steel ball stamping die.

[0068] Example 4

[0069] The difference between this embodiment and embodiment 2 is that the process conditions in the preparation method are different:

[0070] A method for preparing a release agent for a stainless steel ball stamping die comprises the following steps:

[0071] (1) Solid mixing: According to the formula, washing powder, sodium nitrite and water-retaining agent are mixed and stirred at a speed of 250 r / min to obtain a primary mixture;

[0072] (2) Secondary stirring: according to the formula, chlorinated paraffin, oxalic acid, dispersant, the primary mixture in step (1) and half the mass of water are mixed and stirred at a speed of 350 r / min to obtain a secondary stirring mixture;

[0073] (3) Blending: The secondary stirred mixture in step (2) and the remaining half of the mass of water are mixed and stirred at a speed of 500 r / min to obtain a release agent for a stainless steel ball stamping die.

[0074] Example 5

[0075] The difference between this embodiment and embodiment 2 is that the process conditions in the preparation method are different:

[0076] A method for preparing a release agent for a stainless steel ball stamping die comprises the following steps:

[0077] (1) Solid mixing: According to the formula, washing powder, sodium nitrite and water-retaining agent are mixed and stirred at a speed of 300 r / min to obtain a primary mixture;

[0078] (2) Secondary stirring: according to the formula, chlorinated paraffin, oxalic acid, dispersant, the primary mixture in step (1) and half the mass of water are mixed and stirred at a speed of 400 r / min to obtain a secondary stirring mixture;

[0079] (3) Blending: The secondary stirred mixture in step (2) and the remaining half of the mass of water are mixed and stirred at a speed of 600 r / min to obtain a release agent for a stainless steel ball stamping die.

[0080] Example 6

[0081] The difference between this embodiment and embodiment 4 is that the dispersant in this application is hexadecyltrimethylammonium chloride.

[0082] Examples 7-9

[0083] The difference between Examples 7-9 and Example 4 lies in the different water-retaining media used. Examples 7-9 respectively use the water-retaining media of Preparation Examples 2-4.

[0084] Comparative Example

[0085] Comparative Example 1

[0086] The difference between this comparative example and Example 2 is that no water-retaining component is added in this comparative example.

[0087] Comparative Example 2

[0088] The difference between this comparative example and Example 2 is that the water-retaining components in this comparative example are all highly water-soluble water-absorbing resins.

[0089] Comparative Example 3

[0090] The difference between this comparative example and Example 2 is that the water-retaining components in this comparative example are all water-retaining bodies.

[0091] Performance testing

[0092] Detection method

[0093] 1800 mL of each Example and Comparative Example was placed in a 2000 L beaker. After standing at room temperature for 5 days, the top 400 mL of release agent was sampled. After evaporating the water from the sample, the mass was weighed. A higher mass indicates less delamination and more uniform and stable raw materials.

[0094] Table 1 Performance test table

[0095]

[0096] Comparing Examples 1-3, the difference between Examples 1-3 is that the ratio of the release agent raw materials of the stainless steel ball stamping die is different. Since the sample mass in Example 2 is the largest, Example 2 is least likely to be stratified, and the raw material components are more uniform and stable, indicating that the ratio of the raw materials in Example 2 is optimal.

[0097] Comparing Example 4-5 with Example 2, the difference between Example 4-5 and Example 2 is that the process conditions of Example 4-5 are different from those of Example 2. Since the sample mass in Example 4 is the largest, Example 4 is least likely to be stratified, and the raw material components are more uniform and stable, indicating that the process conditions in Example 4 are optimal.

[0098] Comparing Example 6 with Example 4, the difference between Example 6 and Example 4 is that different dispersants are selected. Since the sample mass in Example 4 is larger, Example 4 is least likely to be stratified, and the raw material components are more uniform and stable, indicating that the dispersant in Example 4 is the best.

[0099] Comparing Examples 7-9 with Example 4, the difference between Examples 7-9 and Example 4 is that the water-retaining body of Examples 7-9 is different from that of Example 4. Since the sample mass in Example 9 is the largest, Example 9 is least likely to be stratified, and the raw material components are more uniform and stable, indicating that the process conditions in Example 9 are optimal.

[0100] Finally, Comparative Examples 1-3 are compared with Example 2. The differences between Comparative Examples 1-3 and Example 2 lie in the addition of a water-retaining component and the composition of the water-retaining component. Because the sample in Example 2 has the largest mass, Example 2 is least likely to delaminate, and the raw material components are more uniform and stable, demonstrating that the present invention's solution is superior.

[0101] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A release agent for a stainless steel ball stamping die, characterized in that: Contains the following raw materials in parts by weight: 40-80 parts of chlorinated paraffin; 5-9 parts of oxalic acid; 8-16 parts laundry detergent; 10-20 parts of sodium nitrite; 90-150 parts water; 4-16 parts of dispersant; 10-20 parts of water-retaining component; the water-retaining component includes a highly water-soluble water-absorbing resin and a water-retaining body; The water-retaining body comprises a porous silicon water-retaining body, and the porous silicon water-retaining body is made by the following method: (1) After mixing 10-20 parts of water and 5-15 parts of hexadecyltrimethylammonium bromide by weight, 4-8 parts of silica sol and 2-8 parts of silane coupling agent were added, and the mixture was stirred until a light blue solution appeared to obtain a reaction solution; (2) mixing the reaction solution of step (1) and an aqueous ammonia solution with a mass fraction of 2%-6% in a mass ratio of (5-15):(1-6), stirring, and aging at 45-55°C for 20-28h to obtain an aged product; (3) The aged body in step (2) is dried at 60-80°C for 20-30 minutes and then ground to obtain a porous water-retaining silicon body.

2. A release agent for a stainless steel ball stamping die according to claim 1, characterized in that: Contains the following raw materials in parts by weight: 60 parts of chlorinated paraffin; 7 parts of oxalic acid; 12 parts laundry detergent; 15 parts of sodium nitrite; 120 parts water; 10 parts of dispersant; 15 parts of water-retaining components.

3. The release agent for a stainless steel ball stamping die according to claim 1, characterized in that: The stirring speed in step (2) is 700 r / min.

4. The release agent for a stainless steel ball stamping die according to claim 1, characterized in that: The dispersant includes cetyltrimethylammonium bromide or cetyltrimethylammonium chloride.

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