TWI235105B - Method of foaming and setting foamed objects - Google Patents

Abstract

This invention relates to a method of foaming and setting foamed objects by a simplified process to ensure precise dimension in forming, to improve the passing rate of the foamed objects and to meet the needs of actual applications. This invention provides a method of directly foaming and setting in a mold for making foamed objects. The method designs the dimensions of the cavity to be the actual dimensions of the foamed objects, and includes the steps of: introducing foaming material, vacuuming, heating and vulcanizing, de-vacuuming, foaming, cooling to set the form, opening the mold and removing the foamed object so as to obtain a foamed object with precise dimensions, which is formed in a mold by adopting an integrated operation. This invention improves the passing rate of the foamed objects simplifies the process of forming blanks.

Description

1235105

[Technical field to which the invention belongs] The present invention relates to a foam, in particular, to a foam in-mold forming method, and a method of shaping, which is characterized by using a twisting method based on the actual size of the foam. , Its main foaming raw materials, vacuum pumping, heating and vulcanization molding cavity, sequentially placed in foam molding, in-mold cooling and shaping, demoulding and taking out ^ punishment at the same time release the vacuum, achieve the size of the precise shape, consistent operation molding The material can be used to obtain and improve the yield and shape of the foam. Dry and interstitial primary embryo forming steps [Prior art] The forming and shaping of traditional foams are cut from the hair and made into a raw material plate. ^ The volume of the original core peripheral plate in the predetermined shape. Then i is added by the hot-pressed mold: grinding the board to shape the shaped foam, and finally trimming the shaped foam raw material = In the actual operation of the forming process, there are the following shortcomings urgently, cutting the raw material The remaining material of the foamed board after the board and the scraps of the foamed board generated by the grinding raw materials cannot be recycled repeatedly to become a considerable amount of material. The waste cost is too much and the problem of environmental protection is serious. Waste 2. Cutting the raw material board, trimming the surroundings, and then forming by hot pressing, 拙, ：: w Chengduo is only a cutting step, and the appearance and shape of the formed foam changes, which is a limitation of the hot pressing forming mold. Yet another traditional foam forming and shaping process is to precisely take out the predetermined volume (weight) from the foaming source and put it into a reduced hot-pressed foam. J MoΪ235105 V. Description of the invention⑵ " --- ---- Inside, the internal foaming material is heated for vulcanization & open-mold foam molding. #The molded foam is cooled to reduce the size of the most complete foam in the K industry. Foam; however, it has the following disadvantages in the process of forming in actual operation, but it needs to be improved as follows: 1. 1. Because the foaming raw material is not easy to control and accurately take out the volume of the predetermined shape) '-If it is too much, it will be opened instantly. When the foam is formed, the position of the mold line is burst. If the amount is too short when the mold is opened instantaneously, the formed 2 foam will have recesses or pores. In addition to becoming a more significant waste product, it is easy to cause too much damage. Materials and processing costs. 2. Although the processing steps are simplified, the appearance and shape of the formed foam are easily affected by the temperature and material properties, which makes it impossible to effectively calculate the size of the y-shaped foam when it cools down and sets, resulting in foam. $ The yield of the 疋 type is very low. n Therefore, how to develop a method of forming hair that is different from traditional foams? The method is to reduce waste and waste products and simplify the processing and forming steps. 2 It is easy to determine the shape and improve the yield of foaming and shaping. The use of Fubajian operation molding is really the second item that the related industries need to work hard to develop. [Summary of the Invention] a. Technical problems to be solved. The present invention is designed for the foaming and shaping methods of foams. The processing and forming steps are simplified, and the size is easy to be accurately determined, and the yield of foaming and shaping can be improved, which is in line with the actual operation of molding = designed by research and development. %plus

1235105 V. Description of the invention (3) b. Technical means to solve the problem. If the foam is straight, it is necessary to provide a foam molding mold cavity for hair molding, and then place the foaming cymbals in order, evacuate the vacuum, and release the vacuum at the same time. , The practical effect and purpose of the steps of foam forming, mold release, and interstitial primary embryo forming. The invention with a good yield according to the above-mentioned purpose — step step two step three step four forming mold cavity with actual size of foamed material; put foaming raw material inside the forming mold cavity; set the inside of the forming mold cavity to vacuum Adding foaming raw materials to the road ", the main foam curing reaction temperature, the direct molding method of forming foam, which involves the following steps: vulcanization operation; Step five: at the same time step by step inside the forming cavity The vacuum release foam raw material is directly foamed in the cavity of the forming mold; & Hair step 6: The foamed foam is molded into a… type. The dagger is cooled in the mold cavity. Step 7: Self-forming mold In-cavity demolding and taking out •, take out the foam that has been shaped by the cold part to get a precise size, consistentize your sauce II, and __ the shape and foam of the in-mold shaping foam in the embryo forming step: = Page 6 1235105 V. Description of the invention (4) Wherein step 2 uses solid, granular, sheet-like foaming raw materials, and the foaming raw materials are placed inside the molding cavity, and can be melted into a liquid state. Of The foaming raw material replaces the solid granular and sheet-like foaming raw materials, so that the method uses extrusion and injection to inject the foaming raw material into the forming cavity. C. Contrast the efficacy of the prior art 1. Simplify the processing and forming steps, and eliminate the multi-segment processing steps to achieve the practical effect of consistent operation. 2. Foaming raw materials are directly foamed in the forming cavity, and the mold can be used for cooling and shaping. The possibility of waste products and defective products 3. Completely eliminate the disadvantages of foaming raw materials that need to be predetermined and difficult to accurately control the volume (weight), the shortcomings of instantaneous mold opening foaming and bursting, and the shortcomings. The multiple disadvantages of the size during each setting are to improve the yield of forming and setting of the foam. 4. Extensive waste of material and considerable bad waste are largely eliminated to reduce the cost of materials and processing. [Embodiment] To make shells The review committee can further understand and understand the purpose, characteristics, and effects of this private tomorrow Θ ^ ^ ^ μ t 7 · Act tear people r m,

Take the silk to match [Simplified illustration of the diagram] Detailed description is as follows:] Qian Fan J Please refer to Figure 1, the sun of the present invention ^ ^ ^ ^ ^ ^ β The direct foaming method includes the following steps: Step one: there is the actual size of the foam material # Ding Youcai's forming mold cavity (10); (such as the second

Page 7 1235105 V. Description of the invention (5) (shown in the figure) Step 2: Put the foaming material (11) into the forming cavity (10); (as shown in Figure 3) Step 3: Form The inside of the cavity (10) is evacuated to set a vacuum; Step 4: The foamed raw material (11) is heated to the temperature of the foaming vulcanization reaction to perform the vulcanization operation; Step 5: Simultaneously vacuum the inside of the forming cavity (1 0) one by one Release, so that the foamed raw material (1 1) is directly foamed into the molding cavity (1 0); (as shown in FIG. 4) Step 6: foam the foamed product (20) into the molding die Cooling and setting in the cavity (丨 0); Step 7: Remove the cooled and shaped foam (2 0) from the mold cavity (1 0); (as shown in Figure 5) to obtain a size Forming foaming and direct shaping methods of precise shaping, consistent operation forming, and in-mold shaping foam (20) that simplify the steps of forming the preform. The present invention uses the actual size of the foam (20) as the forming cavity (10) 'sequentially inserts the foaming raw material (丨 丨), and cooperates with the extraction vacuum, heating, and vulcanization operations while releasing the vacuum, mold Direct in-mold foam molding, direct in-mold cooling and sizing, and demoulding to take out the shaped foam (20), you can obtain consistent molding and in-mold molding foam and its manufacturing method, mainly using foam ( 20) = The actual size is set as the forming cavity (10), which replaces the traditional hot-pressing foaming mold for shrinking the foam, which can eliminate the disadvantages of traditional inability to effectively calculate and control the size of each foam when cooling and shrinking. Provide molding foam

1235105

The correct size of the object (20), in addition to the mold cooling cooling setting, can eliminate the traditional instant but shrink the setting, it is not easy to control the shape of the foam (20) to achieve dimensional stability and accurate foam (20) forming and good shape The efficiency and efficiency of direct foam molding in 0, and direct mold open mold foam molding, the shortcomings of the size of the foam when cold, in order to make the shape of the hair, and then to improve the practical function of simplifying the initial embryo forming steps. In the second step, a solid, granular and sheet-like foaming raw material is used (i), and the foaming raw material (11) is housed in the molding cavity (10), and can be melted into a liquid foaming raw material. (11) Instead of the solid granular and sheet-like foamed raw material (11), use the method of extrusion and injection in this procedure step to inject the foamed raw material (1 1) into the forming cavity (丨 Q) , And then the direct molding method for forming the foam in the mold, which includes the steps to change as follows: (as shown in Figure 6) Step 1: a molding cavity with the actual size of the foam (丨 〇); (Shown in Figure 2) Step 2: Put the forming cavity (1 〇) Evacuation is set to vacuum; Step 3: Pre-heat the foamed raw material (丨 丨) to a molten state; Step 4: Inject the foamed raw material (11) into the forming cavity (丨 〇); (as shown in FIG. 3) ) Step 5: Reheat the foamed raw material (1 1) to the temperature of the foaming vulcanization reaction to perform the vulcanization operation; Step 6: Release the vacuum inside the forming cavity (1 0) one by one at the same time, so that the foamed raw material (1) 1) Foam molding directly in the molding cavity (10); (as shown in Figure 4)

1235105 V. Description of the invention (7) Step 7: The foamed product (20) is cooled in the molding cavity (10); Step 8: Remove from the molding cavity (10) and take it out Cooled and shaped foam (20); (as shown in Figure 5) to obtain another in-mold shaped foam with precise size, consistent operation and simplified initial embryo forming steps (20) The forming foam and direct shaping method. [Effect description] The technical content and characteristics of the program steps of the present invention and its purpose of use have been described in detail above. The following is a description of its and expected effects and advantages: a. Compare the effects of the previous technology 1 5. The processing and forming steps can be simplified, and multiple separated processing steps can be eliminated to achieve the practical effect of consistent operation forming. 2. Foaming raw material (11) is foamed directly in the molding cavity (10). It can be used for cooling and shaping in the mold. The size can be precisely determined, eliminating waste products and difficult to accurately control the mold. And the yield of stereotypes. 3, can eliminate the disadvantages of foaming raw materials (11) need to be predetermined and volume (weight), and completely eliminate the shortcomings of instantaneous opening and insufficient, and the multiple disadvantages of the size of the foam when cooling and shrinking, By lifting the foam (20) to form 4 ', it largely eliminates excessive material waste and considerably reduces the cost of materials and processing. Newly added effects of the technical means of the present invention

Page 10 1235105 V. Description of the invention (8) 1. Use instead of traditional foaming. Effective calculation and control can be provided directly at the same time. 2. Use the mold to eliminate the traditional moments that are not easy to control. Each shape is stable and accurate. The previous article is specific. Explain that the spirit of the invention, the original changes and modifications, should be the actual shrinkage of the foam (20), the thermal expansion of the foam, the foam, the cooling of the foam (20), the direct foam molding, Open mold foam molding, the shortcomings of size, to the effect of shaping. The best implementation of the present invention ′ Only if you are familiar with this technology, the present invention will be covered in the following application. The size is set as a mold, which can be set to a small size. Cooling directly with the in-mold foam makes the molded foam-shaped cavity (10). In addition to the traditional disadvantages that cannot be touched, the cooling shape is reduced and the shape is reduced. The technical features bounded by the scope are not deviated from the present, and the scope of these changes is a summary of the direct shaping method of the present invention, which has indeed: = In-mold foaming steps, technical content are not seen in the mouth All the purposes of the month, and its procedures, have met the requirements of the Patent Law ^; I σ 'has not been published before the application, and the application has been made in accordance with the law. 1235105 Brief description of the drawings [Simplified description of the drawings] Figure 1: It is a flow chart of the process steps of the direct molding method of the in-mold foaming of the present invention. Fig. 2 is a cross-sectional view of a forming cavity of the actual size of the foam of the present invention. FIG. 3 is a schematic cross-sectional view of the foaming material of the present invention placed in a molding cavity. Fig. 4 is a schematic cross-sectional view of the foaming material of the present invention foamed directly into the forming cavity. Fig. 5 is a schematic cross-sectional view of a cooling and setting foam which has been demolded and taken out according to the present invention. The fi β • is a flowchart of another procedure step of the direct molding method of the in-mold foam of the present invention. Foaming raw materials ------ (11) Description of component symbols Molding cavity Hair > Packages ~~~

Claims (1)

1235105 VI. The scope of the patent application includes the following ^ steps of direct molding of foam in-mold molding, which includes step one ... the actual size after foaming step two step three step four vulcanization operation; forming mold cavity; Put the foaming material into the inside of the forming cavity; evacuate the inside of the forming cavity to a vacuum; heat the foaming material to the foaming vulcanization reaction temperature, perform V step five, and release the vacuum inside the forming cavity one by one at the same time , Make the foaming material be foamed directly in the molding cavity; type 6; step 6: cooling the foamed molding in the molding cavity; step 7: take out the cooled and shaped hair from the mold cavity The foam can obtain a method of foaming and direct shaping of an in-mold shaped foam that has a precisely sized shape, consistent operation forming and simplified initial embryo forming steps. 02. According to the foaming described in item 1 of the scope of patent application. Direct molding method of in-mold forming foam, in step two, solid granular and sheet-like foamed raw materials are used, and the foamed raw materials are housed in the molding cavity in an inserted manner. Internally, it can melt the liquid foaming raw material instead of the solid granular or flake foaming raw material. In this procedure, the foaming raw material is injected into the cavity of the forming cavity. 3. A direct molding method of foam in-mold forming, which includes the following steps: Page 13 1235105 6. Scope of patent application Step 1 Step 2 Step 3 Step 4 Step 5 Elements Vulcanization Operation Step 6 Molding cavity with actual size of foaming material; Evacuate the inside of the molding cavity to vacuum; Preheat the foaming material in advance Into the molten state; inject the foamed material into the cavity of the forming mold; reheat the foamed material to the temperature of the foaming vulcanization reaction, and release the vacuum inside the cavity of the forming cavity one by one, so that the foamed material is directly in the cavity of the forming cavity Internal foam molding; Molding step 7: Cool the foamed molding in the molding cavity. Step 8: Remove the cooled foam from the molding cavity to obtain a precise and consistent shape. It is transformed into 鳘 1 amaranth forming, 餹 serving; forming and foaming of the in-mold shaping foam in the embryo forming step and direct setting.疋 t method Page 14