Method for producing thermoplastic resin injection-molded article

Abstract

The present invention relates to a method for producing a thermoplastic resin injection molded article. The method comprises the following steps: designing production conditions of a to-be-designed product; carrying out analysis by utilizing mold flow analysis software so as to output a mold flow analysis result; interpreting a mold flow analysis result to evaluate whether an abnormal condition occurs or not; wherein if an abnormal condition occurs in the mold flow analysis result, the manufacturing method returns to the previous step, and the production condition of the product to be designed is modified again; if the mold flow analysis result does not have the abnormal condition, the manufacturing method enters the next operation process; and finally, carrying out an injection molding procedure according to the mold flow analysis result without the abnormal condition and the corresponding production condition to form the thermoplastic resin injection molding product. Therefore, the product development time is shortened, and the number of mistaken tests of online trial production is reduced.

Description

Technical Field

[0001] The present invention relates to a method for manufacturing an injection molded product, and in particular to a method for manufacturing a thermoplastic resin injection molded product, which is suitable for manufacturing a polyester food container. Background Art

[0002] In the prior art, polyester food containers are produced by injection molding. Traditionally, the injection molding process is carried out by trial and error or relying on experience. It is often impossible to immediately improve the problem and it takes a lot of time to set the processing conditions.

[0003] Therefore, the inventors felt that the above defects could be improved, so they devoted themselves to research and applied scientific principles, and finally proposed the present invention which has a reasonable design and effectively improves the above defects. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for manufacturing a thermoplastic resin injection molded product in view of the shortcomings of the prior art.

[0005] In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a manufacturing method of a thermoplastic resin injection molded product, which includes: implementing a simulation analysis operation, including: designing at least one production condition of a product to be designed, and analyzing it using mold flow analysis software to output a mold flow analysis result; implementing a result evaluation operation, including: interpreting the mold flow analysis result to evaluate whether the mold flow analysis result has at least one abnormal condition; wherein, if the mold flow analysis result has at least one abnormal condition, the manufacturing method returns to the simulation analysis operation to re-modify at least one production condition of the product to be designed; conversely, if the mold flow analysis result has no abnormal condition, the manufacturing method continues to enter the next operation flow; and implementing a product molding operation, including: performing an injection molding procedure based on the mold flow analysis result without abnormal conditions and the corresponding production conditions to form a thermoplastic resin injection molded product.

[0006] Preferably, in the simulation analysis operation, the product to be designed is a polyester food container, and the polyester food container is a polyester plastic bowl or a polyester plastic plate.

[0007] Preferably, in the simulation analysis operation, the production condition is at least one of a mold production condition, a product molding condition, and an injection material condition corresponding to the product to be designed.

[0008] Preferably, in the result evaluation operation, the mold flow analysis result is at least one of a flow front temperature result, a volume shrinkage rate, a warpage value, a gate solidification time, a product cooling time, and an injection pressure analysis value.

[0009] Preferably, the abnormal condition is a surface defect or a physical property defect of the product to be designed.

[0010] Preferably, the product to be designed is a polyester food container; in the product molding operation, the production conditions of the injection molding process include the following conditions to form the polyester food container: the runner form of the runner system is a hot runner, the gate form is a pin-point gate, and the gate size is 4.5 mm to 5.5 mm.

[0011] Preferably, in the product molding operation, the production conditions further include adding 0.3-0.5wt% of an external lubricant and 0.5-2wt% of talc powder to the resin material formula.

[0012] Preferably, the product to be designed is a polyester plastic bowl, and the bowl body of the polyester plastic bowl has a plurality of concave-convex patterns arranged side by side, and is distinguished by a plurality of thicker first thickness intervals and a plurality of thinner second thickness intervals; wherein the production conditions of the injection molding process include the following conditions to form the polyester plastic bowl: the thickness of the first bowl body in each of the first thickness intervals is between 5.467 mm and 5.00 mm, and the thickness of the second bowl body in each of the second thickness intervals is between 4.064 mm and 4.532 mm.

[0013] Preferably, the product to be designed is a polyester food container; in the product molding operation, the production conditions of the injection molding process include the following conditions to form the polyester food container: the cooling system in the mold includes: a cooling water channel surrounding the product to be designed, and a special-shaped water channel located on the bowl mouth side of the product to be designed, and the special-shaped water channel is partially surrounded by the cooling water channel.

[0014] Preferably, the product to be designed is a polyester food container; in the product molding operation, the production conditions of the injection molding process include the following conditions to form the polyester food container: the injection molding resin of the production conditions includes: 70-89.9wt% of polyester resin, 0-18wt% of talc, 1-2.5wt% of toughening agent, 0-0.15wt% of crystal nucleating agent, 0.4-1wt% of metal salts, 0-2wt% of crystallization accelerator, 0.1-0.4wt% of polyethylene wax, 0.5-2wt% of white masterbatch, and 0.1-0.2wt% of antioxidant.

[0015] One of the beneficial effects of the present invention is that the manufacturing method of the thermoplastic resin injection molded product provided by the present invention can shorten the product development schedule and reduce the number of try and error of online trial production through the technical solutions of "implementing a simulation analysis operation, including: designing at least one production condition of the product to be designed, and analyzing it using mold flow analysis software to output a mold flow analysis result", "implementing a result evaluation operation, including: interpreting the mold flow analysis result to evaluate whether the mold flow analysis result has at least one abnormal condition; wherein, if the mold flow analysis result has at least one abnormal condition, the manufacturing method returns to the simulation analysis operation to re-modify at least one production condition of the product to be designed; conversely, if the mold flow analysis result has no abnormal condition, the manufacturing method continues to enter the next operation flow", and "implementing a product molding operation, including: performing an injection molding procedure based on the mold flow analysis result without abnormal conditions and the corresponding production conditions to form a thermoplastic resin injection molded product".

[0016] In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the description and drawings are only used to illustrate the present invention, and do not limit the protection scope of the present invention in any way. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a flow chart of a method for manufacturing a thermoplastic resin injection molded product.

[0018] Figure 2A It is a schematic diagram of the original flow channel form of the first embodiment of the present invention.

[0019] Figure 2B This is a schematic diagram of a modified flow channel form of the first embodiment of the present invention.

[0020] Figure 3A It is a side view of a product to be designed according to the second embodiment of the present invention.

[0021] Figure 3B It is a front schematic diagram of a product to be designed according to the second embodiment of the present invention.

[0022] Figure 4A This is the original water circuit design of the cooling system of the third embodiment of the present invention.

[0023] Figure 4B The water circuit design is modified for the cooling system of the third embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following is an explanation of the disclosed embodiments of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following embodiments will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention.

[0025] [Method for producing thermoplastic resin injection molded product]

[0026] See also Figure 1 As shown, an embodiment of the present invention provides a method for producing a thermoplastic resin injection molded article. In this embodiment, the manufacturing method is particularly suitable for manufacturing polyester food containers, such as polyester plastic bowls or polyester plastic plates, but the present invention is not limited thereto.

[0027] The manufacturing method includes step S110, step S120, and step S130.

[0028] It should be noted that the sequence of the steps and the actual operation method in the manufacturing method of the embodiment of the present invention can be adjusted according to the needs and are not limited to those in the present embodiment.

[0029] The manufacturing method of the embodiment of the present invention may provide additional operations before, during, or after each step, and some of the operations described may be replaced, eliminated, or re-arranged to realize additional implementations of the method.

[0030] The step S110 is to perform a simulation analysis operation, including: designing at least one production condition of the product to be designed, and performing analysis using mold flow analysis software to output a mold flow analysis result.

[0031] The step S120 is to perform a result evaluation operation, which includes: interpreting the mold flow analysis result to evaluate whether the mold flow analysis result has at least one abnormal condition.

[0032] If the mold flow analysis result shows at least one abnormal condition, the manufacturing method returns to the simulation analysis operation of step S110, so as to re-modify the at least one production condition of the product to be designed. On the contrary, if the mold flow analysis result shows no abnormal condition, the manufacturing method continues to enter the next operation process.

[0033] The step S130 is to implement a product molding operation, which includes: performing an injection molding process according to the mold flow analysis result that does not show abnormal conditions and the corresponding production conditions to form a thermoplastic resin injection molded product.

[0034] <Products to be designed>

[0035] In this embodiment, the product to be designed is a polyester food container. For example, the polyester food container is a polyester plastic bowl or a polyester plastic plate, but the present invention is not limited thereto.

[0036] Furthermore, the product to be designed can be input into the mold flow analysis software in the form of a drawing, wherein the drawing can be a two-dimensional drawing or a three-dimensional drawing. In this embodiment, the drawing is a three-dimensional drawing.

[0037] <Production conditions>

[0038] Furthermore, the production condition may be, for example, at least one of a mold production condition, a product molding condition, and an injection material condition corresponding to the product to be designed.

[0039] In some embodiments of the present invention, the mold production condition may be, for example, at least one of a mold structure, a runner system, and a cooling system.

[0040] The mold structure includes but is not limited to at least one of the mold form and the mold size. The runner system includes but is not limited to at least one of the runner form, the gate form, and the gate size. The runner form includes but is not limited to at least one of the hot runner and the cold runner. The gate form includes but is not limited to at least one of the pin-point inlet gate and the latent inlet gate. The gate size includes but is not limited to at least one of the gate diameter width and the gate length. The cooling system includes but is not limited to at least one of the waterway position and the waterway method. The waterway position includes but is not limited to at least one of the mold frame and the mold base. The waterway method includes but is not limited to at least one of water, oil, and a heating rod.

[0041] In some embodiments of the present invention, the product molding condition may be, for example, at least one of an injection molding condition and a mold temperature setting condition. The injection molding condition includes, but is not limited to, at least one of a screw diameter, an injection amount, an injection pressure, an injection speed, a material temperature, a filling time, a holding pressure, a holding time, and a cooling time.

[0042] Furthermore, the injection material condition is the material formula of the resin.

[0043] <Mold Flow Analysis Software>

[0044] In some embodiments of the present invention, the mold flow analysis software is Moldex3D or Moldflow, and is preferably Moldex3D, but the present invention is not limited thereto.

[0045] <Mold flow analysis results>

[0046] In some embodiments of the present invention, the mold flow analysis results include but are not limited to at least one of flow front temperature results, volume shrinkage, warpage value, gate solidification time, product cooling time, and injection pressure analysis value.

[0047] It is worth mentioning that the flow front temperature result is generated in the flow analysis stage, which shows the temperature analysis result of the middle layer in the thickness direction when the plastic is filled to a certain position of the product.

[0048] <Abnormal Condition>

[0049] In some embodiments of the present invention, the abnormal condition may be, for example, a surface defect (such as fine water ripples, color difference) or a physical property defect (such as excessive volume shrinkage or excessive warpage) of the polyester food container.

[0050] For example, the abnormal condition may be that the flow front temperature result distribution of the mold flow analysis is not ideal, resulting in surface defects of the finished disk (such as fine water ripples and color difference) or the base cannot be completely filled. Alternatively, the abnormal condition may be, for example, that the volume shrinkage rate or warpage value of the mold flow analysis result is too large.

[0051] In the past, the traditional trial and error method or experience-based injection molding process often failed to immediately improve the problem and took a lot of time to set the processing conditions.

[0052] One of the purposes of the embodiments of the present invention is to use mold flow analysis software tools to assist in modifying the injection material formula or mold during product design, or to perform polymer material processing simulation analysis on a computer when increasing production capacity or optimizing quality during the process stage, so as to shorten the product development schedule and reduce the number of try and error times during online trial production. For example, the present invention can use mold flow analysis software to assist in optimizing injection material formula, product quality, and assist in improving production capacity on site.

[0053] The use process of mold flow analysis software can be to execute in sequence 1. import 3D geometric drawings; 2. check and repair geometric defects; 3. set properties; 4. design gate type; 5. design runner type; 6. design feed point; 7. establish mold base; 8. design cooling water pipe; 9. establish grid and check; and 10. complete simulation analysis model, but the present invention is not limited to the above execution process.

[0054] More specifically, one of the purposes of the embodiments of the present invention is to improve the appearance problems (e.g., uneven surface, warping) of polyester food container injection molded products. Therefore, in the injection molding manufacturing process, mold flow analysis software is introduced to assist in finding the cause of the problem (e.g., stagnation of molten plastic in the flow channel), and based on the results of the mold flow analysis, the injection material formula and process parameters are adjusted to improve the above-mentioned appearance problems and improve the physical properties of the product.

[0055] [First embodiment]

[0056] like Figure 2A and Figure 2B As shown, in the first embodiment of the present invention, the product to be designed is a polyester plastic bowl (PET plastic bowl). Figure 2A It is shown as a side view schematic diagram of the product to be designed (polyester plastic bowl), and the production condition of the original design adopts the runner form of cold runner. Figure 2B Based on Figure 2A design, and modify the runner form of production conditions to hot runner.

[0057] like Figure 2A As shown, in the original design, the production conditions of the product P to be designed adopt the runner form of cold runner CF. The gate form is a pin-point inlet gate, and the size of the inlet gate (the diameter width of the gate) is between 2.5 and 3.5 millimeters (mm). The production conditions are analyzed using mold flow analysis software, and the mold flow analysis results show that the finished product disc base cannot be completely filled. Abnormal situation, therefore, it is necessary to modify the production conditions of the above-mentioned product to be designed.

[0058] like Figure 2BAs shown, in the modified design, the production conditions of the product P to be designed are modified to adopt the runner form of hot runner HF. The gate form is also a pin-point gate, and the size of the gate is modified to 4.5-5.5 mm.

[0059] Thereby, the injection pressure of the injection molding process can be reduced, and the injection volume of the injection molding process can be increased, thereby improving the abnormal situation that the finished disk base cannot be fully filled.

[0060] In addition, the design is modified to add an external lubricant WAX-OP (such as Montan Wax OP) to the resin material formula, with a concentration between 0.3 and 0.5 wt%, and reduce the amount of talcum powder added, with its concentration reduced from 4 to 6 wt% to 0.5 to 2 wt%. In this way, the flowability of the resin in the injection molding process is improved, and the melt flow index (MI) is increased from 35 to 45 g / 10 min to 55 to 65 g / 10 min.

[0061] According to the above configuration, the abnormal situation that the finished dish base cannot be completely filled can be effectively improved, and the surface defects D of the polyester food container, such as fine water ripples and color difference, can also be effectively improved.

[0062] That is, in the first embodiment, the mold flow analysis result without abnormal conditions corresponds to the production conditions that the runner form adopts a hot runner, the gate form adopts a pin-point gate, and the gate size is 4.5-5.5 mm. In addition, the resin material formula contains 0.3-0.5wt% of the external lubricant WAX-OP and 0.5-2wt% of talc, and the melt index of the resin is between 55-65g / 10min.

[0063] [Second embodiment]

[0064] like Figure 3A and Figure 3B As shown, in the second embodiment of the present invention, the product to be designed is a polyester plastic bowl (PET plastic bowl). Figure 3A It is shown as a side view of the product to be designed (polyester plastic bowl), and Figure 3B Shown is a front view of the product to be designed (polyester plastic bowl).

[0065] The bowl body of the product P to be designed has a plurality of concave-convex patterns arranged side by side, and is divided into a plurality of thicker first thickness intervals R1 and a plurality of thinner second thickness intervals R2.

[0066] In the original design, at least one production condition is that the first bowl body thickness T1 of each first thickness interval R1 is between 5.415 mm and 4.931 mm, and the second bowl body thickness T2 of each second thickness interval R2 is between 3.963 mm and 4.447 mm.

[0067] After analysis, it was found that since the original design of the bowl body has a large thickness difference and the inlet gate is designed as a pin-point inlet gate, shrinkage and stretching are prone to occur during the injection molding process, which causes the polyester plastic bowl (polyester food container) to have surface defects D, such as: subtle water ripples or color difference.

[0068] Furthermore, the original design of the gate was a pin-point type. Mold flow analysis found that if the injection molding speed was too fast, the shear force and viscosity distribution would be similar to the abnormal texture of the finished product.

[0069] In the modified design, the production conditions of the product P to be designed are modified to the following: the first bowl body thickness T1 of each first thickness interval R1 is between 5.467 mm and 5.00 mm. The second bowl body thickness T2 of each second thickness interval R2 is between 4.064 mm and 4.532 mm. The modified design thickens the overall thickness of the bowl body and reduces the thickness difference (the thickest minus the thinnest is reduced from 0.7258 mm to 0.7016 mm).

[0070] Furthermore, the design is modified to change the pin-point type inlet gate into a hot runner type inlet gate. In this way, the injection amount of injection molding can be stable, and the shear force and viscosity distribution of the mold flow analysis results are uniform. The present invention has been verified through actual injection products, and the surface of the polyester plastic bowl product has no abnormal texture distribution.

[0071] [Third embodiment]

[0072] like Figure 4A and Figure 4B As shown, in the third embodiment of the present invention, the product to be designed is a polyester plastic bowl (PET plastic bowl). Figure 4A The original water circuit design of the cooling system is shown. Figure 4B Shown is a modified water path design for the cooling system.

[0073] In the original design, the cooling water circuit CW1 of the cooling system in the mold under at least one production condition is designed as follows Figure 4A As shown. The cooling water channel CW1 surrounds the product to be designed (P). The production conditions are analyzed using mold flow analysis software, and the mold flow analysis results show that warping and deformation occur. Therefore, the production conditions of the product to be designed need to be modified.

[0074] In the modified design, in addition to the original cooling water channel CW1, the cooling system in the mold of at least one production condition has an additional special-shaped water channel CW2 on one side (the bowl mouth side) of the product (P) to be designed, and the special-shaped water channel CW2 is partially surrounded by the original cooling water channel CW1. In this way, the warpage of the plastic part can be effectively reduced. In addition, in the modified design, the material temperature of the production condition is set to 265℃ to 275℃, and the mold temperature is set to 120℃ to 135℃.

[0075] After analysis by mold flow analysis software, the originally designed polyester plastic bowl (PET plastic bowl) has a volume shrinkage rate (standard deviation) between 0.790 and 0.795 and a thermal residual stress Von-Mises (standard deviation) between 10.010 and 10.090.

[0076] The modified polyester plastic bowl (PET plastic bowl) has a volume shrinkage (standard deviation) between 0.690 and 0.695 and a thermal residual stress Von-Mises (standard deviation) between 9.010 and 9.090. In other words, the physical properties of the modified polyester plastic bowl (PET plastic bowl) are significantly improved.

[0077] [Fourth embodiment]

[0078] In the fourth embodiment of the present invention, the product to be designed is a polyester plastic bowl (PET plastic bowl). The preferred production conditions obtained after the injection molding resin of the production conditions is analyzed by mold flow analysis software are as follows.

[0079] Based on the total weight of the injection molding resin material being 100wt%, the injection molding resin material comprises: 70-89.9wt% of polyester resin, 0-18wt% of talc, 1-2.5wt% of toughening agent, 0-0.15wt% of crystal nucleating agent, 0.4-1wt% of metal salts, 0-2wt% of crystallization accelerator, 0.1-0.4wt% of polyethylene wax, 0.5-2wt% of white masterbatch, and 0.1-0.2wt% of antioxidant.

[0080] Thereby, the volume change rate of the injected material and the warpage deformation of the finished product can be reduced.

[0081] More specifically, the polyester resin may be polyethylene terephthalate (PET) having an IV value between 0.74 and 0.76.

[0082] Furthermore, the talc powder can be selected from 0 to 5 wt% 3CA and 0-13wt% Talco AH51105. The toughening agent can be selected from LOTADER AX8900. The crystal nucleating agent may be sodium benzoate. The metal salt may be 8920. The crystallization accelerator can be selected from 0-1 wt% PEG 2000 and 0-1 wt% PEG 4000. The polyethylene wax can be selected from 115. The white masterbatch may be WT-9201. The antioxidant may be B225.

[0083] [Fifth embodiment]

[0084] In the fifth embodiment of the present invention, the product to be designed is a polyester plastic bowl (PET plastic bowl). The production conditions are product molding conditions, including injection molding conditions and mold temperature setting conditions. The original conditions of the product molding conditions in the fifth embodiment and the modified conditions after improvement are shown in Table 1.

[0085] [Table 1]

[0086]

[0087] The fifth embodiment of the present invention uses the mold flow analysis results to optimize the molding conditions, and the appearance of the finished product is effectively improved. It is worth mentioning that the optimization conditions include: 1. Increased injection speed: the injection speed increases proportionally with the increase in flow area, the injection speed of the 2nd to 4th zone needs to be increased, and the injection time is controlled at 3-4 seconds; and 2. Increased holding pressure: the holding pressure setting value is set at 30-70% of the maximum injection pressure of the injection machine. The appearance of the finished product can be effectively improved, and the warpage deformation can be effectively reduced.

[0088] [Beneficial Effects of Embodiments]

[0089] One of the beneficial effects of the present invention is that the manufacturing method of the thermoplastic resin injection molded product provided by the present invention can shorten the product development schedule and reduce the number of try and error of online trial production through the technical solutions of "implementing a simulation analysis operation, including: designing at least one production condition of the product to be designed, and analyzing it using mold flow analysis software to output a mold flow analysis result", "implementing a result evaluation operation, including: interpreting the mold flow analysis result to evaluate whether the mold flow analysis result has at least one abnormal condition; wherein, if the mold flow analysis result has at least one abnormal condition, the manufacturing method returns to the simulation analysis operation to re-modify at least one production condition of the product to be designed; conversely, if the mold flow analysis result has no abnormal condition, the manufacturing method continues to enter the next operation flow", and "implementing a product molding operation, including: performing an injection molding procedure based on the mold flow analysis result without abnormal conditions and the corresponding production conditions to form a thermoplastic resin injection molded product". The present invention can utilize mold flow analysis software to assist in optimizing the injection material formula, improve product quality, and assist in increasing production capacity on site.

[0090] Furthermore, the embodiments of the present invention can improve the appearance problems (e.g., uneven surface, warping) of injection molded polyester food containers. Therefore, in the injection molding manufacturing process, mold flow analysis software is introduced to assist in finding the cause of the problem (e.g., stagnation of molten plastic in the flow channel). Based on the results of the mold flow analysis, the injection material formula and process parameters are adjusted to improve the above-mentioned appearance problems and improve the physical properties of the injection molded products.

[0091] The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention description and drawings are included in the scope of the present invention.

Claims

1. A method for manufacturing a thermoplastic resin injection molded product, characterized in that: The method for manufacturing the thermoplastic resin injection molded product comprises: Implementing simulation analysis operations, including: designing at least one production condition of the product to be designed, and analyzing it using mold flow analysis software to output mold flow analysis results; Implementing a result evaluation operation includes: interpreting the mold flow analysis result to evaluate whether the mold flow analysis result has at least one abnormal condition; wherein, if the mold flow analysis result has at least one abnormal condition, the manufacturing method returns to the simulation analysis operation to re-modify at least one production condition of the product to be designed; conversely, if the mold flow analysis result has no abnormal condition, the manufacturing method continues to enter the next operation process; and Implementing product molding operations includes: performing an injection molding procedure according to the mold flow analysis results without abnormal conditions and the corresponding production conditions to form a thermoplastic resin injection molded product.

2. The method for producing a thermoplastic resin injection molded product according to claim 1, wherein: In the simulation analysis operation, the product to be designed is a polyester food container, and the polyester food container is a polyester plastic bowl or a polyester plastic plate.

3. The method for manufacturing a thermoplastic resin injection molded product according to claim 1, wherein: In the simulation analysis operation, the production condition is at least one of a mold production condition, a product molding condition, and an injection material condition corresponding to the product to be designed.

4. The method for producing a thermoplastic resin injection molded product according to claim 1, wherein: In the result evaluation operation, the mold flow analysis result is at least one of a flow front temperature result, a volume shrinkage rate, a warpage value, a gate solidification time, a product cooling time, and an injection pressure analysis value.

5. The method for producing a thermoplastic resin injection molded product according to claim 1, wherein: The abnormal condition is a surface defect or a physical property defect of the product to be designed.

6. The method for producing a thermoplastic resin injection molded product according to claim 1, wherein: The product to be designed is a polyester food container; in the product molding operation, the production conditions of the injection molding process include the following conditions to form the polyester food container: the runner form of the runner system adopts a hot runner, the gate form adopts a pin-point gate, and the gate size is 4.5 mm to 5.5 mm.

7. The method for producing a thermoplastic resin injection molded product according to claim 6, wherein: In the product molding operation, the production conditions further include adding 0.3-0.5wt% of an external lubricant and 0.5-2wt% of talc powder to the resin material formula.

8. The method for producing a thermoplastic resin injection molded product according to claim 1, wherein: The product to be designed is a polyester plastic bowl, and the bowl body of the polyester plastic bowl has a plurality of concave-convex patterns arranged side by side, and is distinguished by a plurality of thicker first thickness intervals and a plurality of thinner second thickness intervals; wherein the production conditions of the injection molding process include the following conditions to form the polyester plastic bowl: the first bowl body thickness of each of the first thickness intervals is between 5.467 mm and 5.00 mm, and the second bowl body thickness of each of the second thickness intervals is between 4.064 mm and 4.532 mm.

9. The method for producing a thermoplastic resin injection molded product according to claim 1, wherein: The product to be designed is a polyester plastic container; in the product molding operation, the production conditions of the injection molding process include the following conditions to form the polyester plastic container: the cooling system in the mold includes a cooling water channel surrounding the product to be designed, and a special-shaped water channel located on the bowl mouth side of the product to be designed, and the special-shaped water channel is partially surrounded by the cooling water channel.

10. The method for producing a thermoplastic resin injection molded product according to claim 1, wherein: The product to be designed is a polyester plastic container; in the product molding operation, the production conditions of the injection molding process include the following conditions to form the polyester plastic container: the injection molding resin of the production conditions includes: 70-89.9wt% of polyester resin, 0-18wt% of talc, 1-2.5wt% of toughening agent, 0-0.15wt% of crystal nucleating agent, 0.4-1wt% of metal salts, 0-2wt% of crystallization accelerator, 0.1-0.4wt% of polyethylene wax, 0.5-2wt% of white masterbatch, and 0.1-0.2wt% of antioxidant.

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