Plastic mixture and hot press molding method

Abstract

The invention discloses a plastic mixture and a hot press molding method.The plastic mixture is prepared from, by mass, 80.5% of polycarbonate, 5% of acrylonitrile-butadiene-styrene copolymer, 10% of flexibilizer and 4.5% of additive, the hot press molding method comprises the following steps that the mixture is heated to be melted and put into an injection molding machine, and a semi-finished product is obtained; the hot pressing temperature, the pressure maintaining time and the mold closing pressure value of the hot pressing mold are set; and putting the semi-finished product into a hot-pressing mold, heating to a preset temperature, softening the semi-finished product, and then carrying out hot-pressing operation. By adopting the method, the sewage stirring mechanism is arranged in the shell to accelerate the mixing efficiency of the medicament and the sewage, and the spray head is arranged on the sewage stirring mechanism, so that the medicament is injected from the interior of the sewage and is sprayed in multiple directions along with the rotation of the sewage stirring mechanism, the mixing speed of the medicament and the sewage is further increased, and the sewage treatment efficiency is accelerated; and the filter plate can be taken out for cleaning, so that the subsequent filtering effect is ensured, and repeated use is realized.

Description

Technical Field

[0001] The invention relates to the technical field of plastic molding, in particular to a plastic mixture and a hot pressing molding method. Background Art

[0002] In the field of digital tubes of electronic products, plastic products are usually used. Traditional plastic products are mostly made by injection molding. This method is simple and efficient, but it cannot achieve the molding effect and purpose for some arc-shaped geometric 3D with relatively complex structures and difficult to build molds. Therefore, the market uses injection molding technology combined with molds to achieve the desired physical effect. However, for some special-shaped products with relatively high structural complexity, it is difficult to meet the required requirements for some special-shaped or arc-shaped parts due to the influence of material properties such as thermoplasticity, ductility, melting point and hardness.

[0003] Therefore, it is urgent to design a plastic mixture and a thermoforming method to overcome the above-mentioned deficiencies of one or more prior arts. Summary of the invention

[0004] The technical solution adopted by the present invention to achieve the above technical purpose is: in the first aspect, a plastic mixture is provided, characterized in that it includes the following components in mass ratio: 80.5% polycarbonate, 5% acrylonitrile-butadiene-styrene copolymer, 10% toughening agent, and 4.5% additive.

[0005] In a preferred embodiment, the additive is one or more of a light stabilizer, a heat stabilizer, a lubricant, and a nucleating agent.

[0006] Another aspect of the present invention provides a method for hot pressing the plastic mixture according to any one of the above embodiments, characterized in that it comprises: a male mold base, a female mold base, a first side mold base, and a second side mold base, wherein the male mold base and the female mold base are opposite to each other up and down, the first side mold base and the second side mold base are respectively located on both sides of the female mold base, a heating device is respectively arranged in the male mold base, the female mold base, the first side mold base and the second side mold base, a mold cavity of a predetermined shape is arranged in the female mold base, a mold head adapted to the mold cavity is arranged in the male mold base, and the plastic mixture is placed in the mold cavity of the female mold base; the hot pressing method is as follows:

[0007] S1, mixing polycarbonate, acrylonitrile-butadiene-styrene copolymer, toughening agent and additives according to a ratio to prepare a mixture;

[0008] S2, heating and melting the mixture in step S1 and placing it into an injection molding machine to obtain a semi-finished product;

[0009] S3, setting the hot pressing temperature, holding time and mold clamping pressure value of the hot pressing mold;

[0010] S4, placing the semi-finished product in step S2 into a hot pressing mold, heating it to a predetermined temperature, softening the semi-finished product, and then performing a hot pressing operation.

[0011] In a preferred embodiment, the hot pressing temperature is 100°C-150°C.

[0012] In a preferred embodiment, the holding time is 15s-30s.

[0013] In a preferred embodiment, the mold clamping pressure is 5 bar-15 bar.

[0014] The beneficial effects of the present invention are as follows: a semi-finished product that meets the requirements of secondary hot pressing is made by a special material ratio, and hot pressing is performed by a hot pressing mold. This method effectively solves the problem in the prior art that it is difficult to open a mold for special-shaped products, and this method has an outstanding molding effect when processing special-shaped products, meeting the expected design effect when the product is molded. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the hot pressing mold of the present invention.

[0016] In the figure:

[0017] 10. Male mold base; 11. Die head; 12. Female mold base; 13. Die cavity; 14. Heating device; 15. First side die base; 16. Second side die base. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0019] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0020] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0021] In the embodiments of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0022] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the present invention include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] The present invention provides a plastic mixture, characterized in that it comprises the following components in mass ratio: 80.5% of polycarbonate, 5% of acrylonitrile-butadiene-styrene copolymer, 10% of toughening agent, and 4.5% of additive;

[0024] Furthermore, the additive is one or more of a light stabilizer, a heat stabilizer, a lubricant, and a nucleating agent;

[0025] like Figure 1 As shown, another aspect of the present invention provides a hot pressing molding method comprising: a male mold base 10, a female mold base 12, a first side mold base 15, and a second side mold base 16, wherein the male mold base 10 and the female mold base 12 are opposite to each other, the first side mold base 15 and the second side mold base 16 are respectively located on both sides of the female mold base 12, and heating devices 14 are respectively provided in the male mold base 10 and the female mold base 12 and the first side mold base 15 and the second side mold base 16, a mold cavity 13 of a predetermined shape is provided in the female mold base 12, a die head 11 adapted to the mold cavity 13 is provided in the male mold base 10, and the plastic mixture is placed in the mold cavity 13 of the female mold base 12; the hot pressing molding method is as follows:

[0026] S1, mixing polycarbonate, acrylonitrile-butadiene-styrene copolymer, toughening agent and additives according to a ratio to prepare a mixture;

[0027] S2, heating and melting the mixture in step S1 and placing it into an injection molding machine to obtain a semi-finished product;

[0028] S3, setting the hot pressing temperature, holding time and mold clamping pressure value of the hot pressing mold;

[0029] S4, placing the semi-finished product in step S2 into a hot pressing mold, heating it to a predetermined temperature, softening the semi-finished product, and then performing a hot pressing operation;

[0030] Further, the hot pressing temperature is 100°C-150°C;

[0031] Furthermore, the holding time is 15s-30s;

[0032] Furthermore, the clamping pressure is 5 bar-15 bar;

[0033] Specifically, 80.5% of polycarbonate, 5% of acrylonitrile-butadiene-styrene copolymer, 10% of toughening agent and 4.5% of additives are mixed together to prepare a mixture, wherein the additives include but are not limited to one or more of light stabilizers, heat stabilizers, lubricants, nucleating agents, etc., which can be selected according to product requirements, and preferably the content of light stabilizer is 3%, the heat stabilizer is 4%, the lubricant is 5%, and the nucleating agent is 10%. Such additives meet OSHA safety standards. The raw materials made by this ratio can make the performance of products made using the raw materials more suitable for secondary bending, and more convenient for physical restoration of 3D models, solving the problem that traditional molds are difficult to open molds for special-shaped products and have high production costs.

[0034] The mixture is made into a preliminary semi-finished product through an injection molding process, and is subjected to secondary processing by a hot pressing mold according to the following hot pressing molding method. This method is mainly for products with special shapes and curved surface requirements, wherein the hot pressing mold comprises: a male mold base 10 and a female mold base 12. A mold cavity 13 of a predetermined shape is provided in the female mold base 12. Depending on the product requirements, a die head 11 adapted to the mold cavity 13 is provided in the male mold base 10. At the same time, a heating device 14 is provided in the female mold base 12, the male mold base 10, the first side die base 15 and the second side die base 16, preferably a heating tube, and a temperature control device (not shown in the figure) connected to the heating device for controlling the heating device is also provided to control the temperature of the heating device; to ensure that the product can form a predetermined shape, a first side die base 15 is provided on one side of the female mold base 12, A second side die seat 16 is provided on the opposite side. The first side die seat 15 and the second side die seat 16 are driven by a cylinder, an oil cylinder, a screw, etc. During hot pressing, the hot pressing temperature, the holding time and the mold closing pressure value of the hot pressing mold are set first, and then the semi-finished product is placed in the mold cavity 13 and heated to soften it. After the predetermined requirements are met, the hot pressing operation is started to hot press the semi-finished product into a predetermined shape. In this process, in order to ensure the product molding effect, in this embodiment, the hot pressing temperature is set within 100°C-150°C, the mold closing pressure value is set at 5bar-15bar, and the holding time is 15s-30s. Within this range, the product molding effect is the best, among which the middle value is preferred. The hot pressing formed product under this value has a better effect than the hot pressing formed products at the two end point values.

[0035] In summary, the present invention uses a special material ratio to make a semi-finished product that meets the requirements of secondary hot pressing molding, and performs hot pressing molding through a hot pressing mold. This method effectively solves the problem in the prior art that it is difficult to open the mold for special-shaped products, and this method has an outstanding molding effect when processing special-shaped products, and meets the expected design effect when the product is molded.

[0036] The present invention is not limited to what is described in the specification and implementation modes, and therefore additional advantages and modifications can be easily realized by those skilled in the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. A plastic mixture, characterized in that The invention comprises the following components in mass ratio: 80.5% of polycarbonate, 5% of acrylonitrile-butadiene-styrene copolymer, 10% of toughening agent and 4.5% of additive.

2. The plastic mixture according to claim 1, characterized in that The additive is one or more of a light stabilizer, a heat stabilizer, a lubricant, and a nucleating agent.

3. A method for hot pressing the plastic mixture according to any one of claims 1 to 2, characterized in that: include: A male mold base, a female mold base, a first side die base, and a second side die base, wherein the male mold base and the female mold base are opposite to each other in vertical direction, the first side die base and the second side die base are respectively located on both sides of the female mold base, heating devices are respectively arranged in the male mold base, the female mold base, the first side die base, and the second side die base, a mold cavity of a predetermined shape is arranged in the female mold base, a die head adapted to the mold cavity is arranged in the male mold base, and the plastic mixture is placed in the mold cavity of the female mold base; the hot pressing molding method is as follows: S1, mixing polycarbonate, acrylonitrile-butadiene-styrene copolymer, toughening agent and additives according to a ratio to prepare a mixture; S2, heating and melting the mixture in step S1 and placing it into an injection molding machine to obtain a semi-finished product; S3, setting the hot pressing temperature, holding time and mold clamping pressure value of the hot pressing mold; S4, placing the semi-finished product in step S2 into a hot pressing mold, heating it to a predetermined temperature, softening the semi-finished product, and then performing a hot pressing operation.

4. The hot pressing method according to claim 3, characterized in that: The hot pressing temperature is 100°C-150°C.

5. The hot pressing forming method according to claim 3, characterized in that: The holding time is 15s-30s.

6. The hot pressing forming method according to claim 3, characterized in that: The clamping pressure is 5 bar to 15 bar.

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