Liquid spraying device of plastic forming machine and plastic forming machine

Abstract

The utility model relates to a liquid spraying device of a plastic forming machine and the plastic forming machine. The liquid spraying device of the plastic forming machine comprises a plate body assembly and a nozzle, the plate body assembly is used for fixing a male die, the plate body assembly comprises a first plate body and a first side plate, and an open cavity is defined by the first plate body and the first side plate; the nozzle is embedded in the first plate body in a penetrating mode and comprises a liquid inlet end and a liquid spraying end, the liquid inlet end is used for allowing external first liquid to enter, and the liquid spraying end is used for spraying out the first liquid so as to act on the side, away from the female die, of the male die. According to the liquid spraying device of the plastic forming machine, the first liquid can act on the male die through the nozzle, and the liquid spraying effect of the liquid spraying device of the plastic forming machine can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of plastic molding equipment, and in particular to a liquid spraying device for a plastic molding machine and a plastic molding machine. Background Art

[0002] With the development of plastic molding equipment processing technology, plastic molding processing technology has emerged. Plastics are processed and molded by using plastic molding machines to shape plastics into the structure and shape required by users.

[0003] In the related art, the plastic molding machine is usually a three-plate mold, including a male mold, a female mold and a liquid spray steam chamber. After the plastic material in a softened flow state enters the plastic molding machine, the plastic is molded into the structure and shape required by the user under the action of the male mold and the female mold. Specifically, during the process of processing and molding the plastic, it is necessary to spray a heating liquid or a cooling liquid through the liquid spray steam chamber to keep the plastic in a softened flow state or harden the plastic into a fixed shape.

[0004] However, in the three-plate mold, a plurality of uneven fence plates are distributed as reinforcement ribs on the side of the punch away from the die. In the process of fixing the punch to the spray steam chamber, the fence plates are easy to crush the spray pipe on the spray steam chamber, affecting the spray effect of the spray steam chamber. Summary of the invention

[0005] Based on this, it is necessary to provide a liquid spraying device for a plastic molding machine and a plastic molding machine, aiming to solve the problem that the liquid spraying effect of the liquid spraying steam chamber is affected by the liquid spraying pipe on the liquid spraying steam chamber being crushed by the fence plate.

[0006] A liquid spraying device for a plastic molding machine is applied to a three-plate mold, wherein the three-plate mold includes a male mold and a female mold. The liquid spraying device for the plastic molding machine includes:

[0007] A plate assembly is used to fix the male mold, and the plate assembly includes a first plate and a first side plate, and the first plate and the first side plate are arranged to form an open cavity;

[0008] The nozzle is embedded in the first plate body and comprises a liquid inlet end and a liquid spray end. The liquid inlet end is used for allowing the first liquid from the outside to enter, and the liquid spray end is used for spraying the first liquid to act on the side of the punch away from the die.

[0009] In one embodiment, along the thickness direction of the first plate body, the distance between the liquid inlet end and the liquid spray end is less than or equal to the thickness of the first plate body.

[0010] In one embodiment, the flow cross-sectional area of ​​the liquid inlet end is smaller than the flow cross-sectional area of ​​the liquid injection end.

[0011] In one embodiment, there are multiple nozzles, and the multiple nozzles are evenly distributed along the surface of the first plate.

[0012] In one embodiment, when the pressure of the first liquid entering the liquid inlet end is less than or equal to 0.3 MPa, the distance of the liquid sprayed from the liquid spray end is greater than or equal to the distance between the liquid spray end and the side of the male mold away from the female mold.

[0013] In one embodiment, the first liquid is a cooling liquid.

[0014] In one embodiment, the plate assembly further comprises:

[0015] A second plate body, the second plate body being provided with a liquid spraying port;

[0016] The second side plate, the first plate body, the second plate body and the first side plate are arranged to form a receiving cavity;

[0017] The first plate body also includes a first liquid inlet, which is used to allow an external second liquid to enter the accommodating cavity, and the liquid spraying port is used to spray the second liquid out of the accommodating cavity to act on the side of the male mold away from the female mold.

[0018] In one embodiment, the liquid spraying device of the plastic molding machine further comprises:

[0019] The first liquid discharge port is provided through the first plate body and is used for discharging the first liquid and / or the second liquid.

[0020] In one embodiment, the liquid spraying device of the plastic molding machine further comprises:

[0021] The liquid inlet assembly is arranged on a side of the first plate body away from the open cavity. The liquid inlet assembly includes multiple liquid inlet joints and multiple liquid inlet adapters. The liquid inlet joints include a second liquid inlet and multiple second liquid discharge ports. One ends of the multiple liquid inlet adapters are connected to the liquid inlet ends of the multiple nozzles one by one, and the other ends of the multiple liquid inlet adapters are connected to the multiple second liquid discharge ports one by one. The second liquid inlet is used to allow the external first liquid to enter.

[0022] A plastic molding machine comprises a male mold, a female mold and a liquid spraying device of the plastic molding machine.

[0023] The above-mentioned liquid spraying device for plastic molding machine and plastic molding machine, the liquid spraying device for plastic molding machine includes a plate assembly and a nozzle, the plate assembly is used to fix the punch, the plate assembly includes a first plate and a first side plate, the first plate and the first side plate are surrounded to form an open cavity; the nozzle is embedded in the first plate, the nozzle includes a liquid inlet end and a liquid spray end, the liquid inlet end is used to allow the first liquid from the outside to enter, and the liquid spray end is used to spray the first liquid to act on the side of the punch away from the die. The liquid spraying device for plastic molding machine of the present application, since the nozzle is embedded in the first plate, in the process of fixing the punch and the plate assembly in the liquid spraying device for plastic molding machine, the fence plate on the punch will not contact the nozzle, and will not cause damage to the nozzle, the nozzle can act on the punch with the first liquid, and can improve the liquid spraying effect of the liquid spraying device for plastic molding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of a liquid spraying device for a plastic molding machine in one embodiment of the present application.

[0025] Figure 2 It is a structural schematic diagram of a liquid spraying device for a plastic molding machine in one embodiment of the present application from one viewing angle.

[0026] Figure 3 This is a schematic structural diagram of a liquid spraying device for a plastic molding machine in one embodiment of the present application from another perspective.

[0027] Figure 4 for Figure 1 Bottom view of .

[0028] Description of reference numerals:

[0029] 1. Liquid spraying device for plastic molding machine;

[0030] 11. Plate assembly; 12. Nozzle; 13. First liquid discharge port; 14. Liquid inlet assembly;

[0031] 111, first plate body; 112, first side plate; 113, open cavity; 114, second plate body; 115, second side plate;

[0032] 121, liquid inlet end; 122, liquid spray end;

[0033] 141. Liquid inlet connector; 142. Liquid inlet adapter;

[0034] 1111, first liquid inlet; 1141, liquid spray outlet;

[0035] 1411. Second liquid inlet; 1412. Second liquid outlet. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application 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 application. However, the present application 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 application, so the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 present application.

[0038] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0042] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 A schematic structural diagram of a liquid spraying device for a plastic molding machine in one embodiment of the present application is shown. Figure 2 A structural schematic diagram of a liquid spraying device for a plastic molding machine in one embodiment of the present application is shown from one viewing angle. Figure 3 A structural schematic diagram of a liquid spray device for a plastic molding machine in an embodiment of the present application from another perspective is shown. A liquid spray device 1 for a plastic molding machine provided in an embodiment of the present application comprises a plate assembly 11 and a nozzle 12. The plate assembly 11 is used to fix the punch, and the plate assembly 11 comprises a first plate 111 and a first side plate 112, and the first plate 111 and the first side plate 112 are arranged to form an open cavity 113; the nozzle 12 is embedded in the first plate 111, and the nozzle 12 comprises a liquid inlet end 121 and a liquid spray end 122, and the liquid inlet end 121 is used to allow the first liquid from the outside to enter, and the liquid spray end 122 is used to spray the first liquid to act on the side of the punch away from the die.

[0043] It should be noted that the liquid spraying device 1 of the plastic molding machine of the present application is applied to a three-plate mold. The three-plate mold includes a punch and a die. The punch is a part in the mold product used to mold the inner surface of the plastic product. The die is a part in the mold product used to mold the outer surface of the plastic product. Under the joint action of the relative movement of the punch and the die, the plastic product in a softened flow state is molded. In addition, the three-plate mold may also include a flow channel plate and an ejector plate. The flow channel plate is used to control the flow direction and feed amount of the stamped plastic material. The flow channel plate is usually processed with flow channels of various shapes to accommodate plastic products of different shapes and sizes. The ejector plate is used to eject the plastic product from the die. The ejector plate is usually equipped with an ejector rod and an ejector pad to transmit the ejection force.

[0044] For the convenience of explanation, the side of the punch away from the die is called the back of the punch, and the side of the punch facing the die is called the front of the punch. The punch is fixed on the plate assembly 11 of the liquid spraying device 1 of the plastic molding machine, and the liquid spraying end 122 of the nozzle 12 faces the back of the punch. In the process of the punch moving relative to the die to form the plastic product, in order to keep the plastic product in the best molding state and to make the molded plastic product have better quality, it is necessary to spray heated liquid to the punch through the nozzle 12 during the movement of the punch relative to the die, so as to keep the plastic product in the best molding state. After the plastic product is formed into the desired structure and shape, it is necessary to spray cooling liquid to the punch through the nozzle 12, so as to shape the plastic product through the cooling effect of the cooling liquid, so as to process a plastic product that meets user needs.

[0045] In the embodiment of the present application, the plate assembly 11 of the liquid spraying device 1 of the plastic molding machine serves as the frame structure of the liquid spraying device 1 of the plastic molding machine. On the one hand, it is used to support and fix the punch to ensure the stability of the punch relative to the die; on the other hand, it is used to fix the nozzle 12 so that the nozzle 12 sprays the first liquid to the punch, thereby changing the state of the plastic product between the punch and the die. Specifically, since the nozzle 12 is embedded in the first plate 111, the nozzle 12 will not contact the fence plate on the back of the punch. After the punch is fixed to the plate assembly 11, the fence plate on the back of the punch will not damage the nozzle 12. The nozzle 12 can act on the punch with the external first liquid, thereby improving the liquid spraying effect of the liquid spraying device 1 of the plastic molding machine.

[0046] In addition, since the nozzle 12 is embedded in the first plate body 111, when designing the structure, size and position of the fence plate on the back of the punch, the designer only needs to consider accommodating the fence plate on the back of the punch in the open cavity 113 of the liquid spraying device 1 of the plastic molding machine, and does not need to consider the collision with the nozzle 12 caused by factors such as the structure, size and position of the fence plate. On the one hand, the efficiency of the designer in designing the punch is improved; on the other hand, since the content that the designer needs to consider and pay attention to and the corresponding workload are reduced, the probability of error in the design process is avoided, and the error rate of the designer in the design process is reduced. In addition, since the designer does not need to adopt additional design solutions to avoid the collision between the fence plate on the back of the punch and the nozzle 12, the difficulty of the overall design of the punch can be reduced, and the designed punch can be made simpler, thereby reducing the difficulty of manufacturing the punch during the production and manufacturing of the punch by the manufacturing personnel.

[0047] Similarly, it can be understood that since the difficulty of the overall design of the punch and the difficulty of producing and manufacturing the punch have been improved, and the plastic molding machine spray device 1 of the present application only needs to embed the nozzle 12 through the first plate body 111, the processing and production difficulties of the plastic molding machine of the present application are simultaneously improved. In the subsequent assembly process of the punch and the plastic molding machine of the present application, the assembly process can be simplified to facilitate the operation of the staff.

[0048] Furthermore, since the nozzle 12 is embedded in the first plate body 111, the fence plate on the back of the punch will not collide with the nozzle 12. When the pressure requirement of the first liquid on the punch is low, the distance between the fence plate on the back of the punch and the nozzle 12 can be further reduced, and the angle and position of the nozzle 12 can be adjusted to improve the spraying effect of the first liquid on the punch under low pressure conditions.

[0049] In some embodiments, along the thickness direction of the first plate body 111, the distance between the liquid inlet end 121 and the liquid spray end 122 is less than or equal to the thickness of the first plate body 111. Figure 2 and Figure 3 , Figure 2 A structural schematic diagram of a liquid spraying device for a plastic molding machine in one embodiment of the present application is shown from one viewing angle. Figure 3A structural schematic diagram of the liquid spraying device of a plastic molding machine in an embodiment of the present application is shown from another perspective. Since the distance between the liquid inlet end 121 and the liquid spraying end 122 along the thickness direction of the first plate body 111 is less than or equal to the thickness of the first plate body 111, the nozzle 12 can be completely embedded in the first plate body 111. Therefore, even if the fence plate on the back of the punch contacts the surface of the first plate body 111 on the side having the open cavity 113, the fence plate on the back of the punch will not contact or even collide with the nozzle 12, thereby avoiding the situation where the fence plate on the back of the punch damages the nozzle 12 to the greatest extent.

[0050] On the one hand, the overall safety of the liquid spraying device 1 of the plastic molding machine is improved, thereby further improving the liquid spraying effect of the liquid spraying device 1 of the plastic molding machine; on the other hand, the fence plates on the back of the punch will not affect the position of the nozzle 12 spraying the first liquid, thereby further improving the design efficiency of the designers and simplifying the operation of the staff in assembling the punch and the liquid spraying device 1 of the plastic molding machine.

[0051] In some embodiments, the flow cross-sectional area of ​​the liquid inlet end 121 is smaller than the flow cross-sectional area of ​​the liquid spraying end 122. For the convenience of description, in this embodiment, the flow cross-sectional area of ​​the liquid inlet end 121 is smaller than the flow cross-sectional area of ​​the liquid spraying end 122, that is, along the direction from the liquid inlet end 121 of the nozzle 12 toward the liquid spraying end 122, the shape of the nozzle 12 is called a flared shape.

[0052] When the first liquid enters the nozzle 12 through the liquid inlet end 121 and is sprayed onto the punch through the liquid spray end 122, since the shape of the nozzle 12 is flared, on the one hand, the angle and direction of the spraying of the first liquid can be changed by the flared nozzle 12 structure, so that when the position of the punch is not ideal after the punch and the plastic molding machine spray device 1 are installed, the first liquid can be accurately sprayed to the required position on the punch by changing the spraying direction of the first liquid, thereby improving the spraying effect of the plastic molding machine spray device 1 and facilitating the assembly of the punch and the plastic molding machine spray device 1 by the staff; on the other hand, since the first liquid is sprayed onto the punch through the flared nozzle 12, the range of the nozzle 12 spraying onto the punch can be expanded, thereby further improving the spraying effect of the plastic molding machine spray device 1.

[0053] Optionally, the cross-sections of the liquid inlet end 121 and the liquid spray end 122 are both circular, and the center line of the liquid inlet end 121 and the center line of the liquid spray end 122 are collinear. For the convenience of description, in this embodiment, the cross-sections of the liquid inlet end 121 and the liquid spray end 122 are both circular, and the center line of the liquid inlet end 121 and the center line of the liquid spray end 122 are collinear, that is, the flared nozzle 12 is a fan-shaped nozzle 12.

[0054] Since the nozzle 12 is fan-shaped, on the basis of expanding the direction and range of the first liquid through the flared nozzle 12, the first liquid is evenly dispersed and sprayed onto the punch along the center line of the fan, which can improve the uniformity of the first liquid in the process of spraying the punch, thereby avoiding that some areas of the punch are sprayed with too much first liquid, and some areas of the punch are sprayed with too little first liquid, thereby avoiding the occurrence of structural unevenness in the plastic product between the punch and the die during heating or cooling.

[0055] Furthermore, the plastic product between the male mold and the female mold is prevented from having excessive stress at some locations and too little stress at other locations during heating or cooling, which affects the quality and performance of the plastic product. Therefore, the nozzle 12 is designed as a fan-shaped structure, which can improve the quality and performance of the plastic product and meet the needs of users.

[0056] In some embodiments, there are multiple nozzles 12, and the multiple nozzles 12 are evenly distributed along the surface of the first plate 111. Figure 1 , Figure 1 The schematic diagram of the structure of the liquid spraying device of the plastic molding machine in one embodiment of the present application is shown. In the process of heating the plastic product by spraying the first liquid through the nozzle 12 to mold the plastic product, or in the process of cooling the plastic product by spraying the first liquid through the nozzle 12 to shape the plastic product, since there are multiple nozzles 12, and the multiple nozzles 12 are evenly distributed along the surface of the first plate 111, the efficiency of molding the plastic product or the efficiency of shaping the plastic product can be improved through the joint action of the multiple nozzles 12, that is, the processing efficiency of the plastic product can be improved.

[0057] Similarly, since the multiple nozzles 12 are evenly distributed along the surface of the first plate 111, the plastic product between the male mold and the female mold is prevented from having excessive stress at some locations and too little stress at other locations during heating or cooling, thereby affecting the quality and performance of the plastic product. The present application evenly distributes the multiple nozzles 12 on the surface of the first plate 111, thereby improving the quality and performance of the plastic product and meeting the needs of users.

[0058] Of course, optionally, there are multiple nozzles 12, and the multiple nozzles 12 are discretely distributed along the surface of the first plate 111. When the plastic products are only for mass production and the processing quality requirements are not high, multiple nozzles 12 can be designed in a discrete distribution, so that on the basis of improving the design efficiency of the designer, the designed plastic molding machine liquid spraying device 1 can effectively improve the processing efficiency of the plastic products. The shape and number of the nozzles 12 can be improved accordingly for specific molds and plastic products, and the shape and number of the nozzles 12 are not repeated here.

[0059] In some embodiments, when the pressure of the first liquid entering the liquid inlet end 121 is less than or equal to 0.3Mpa, the distance of the liquid sprayed out by the liquid spray end 122 is greater than or equal to the distance between the liquid spray end 122 and the side of the male mold away from the female mold. On the one hand, the pressure of the first liquid provided by the external liquid supply device can be reduced, and the energy loss of the external liquid supply device can be reduced, thereby reducing the energy consumed by the plastic product during the processing; on the other hand, when the pressure of the first liquid is too high, during the molding or shaping of the plastic product, the processing of the plastic product may be too intense, thereby affecting the processing quality of the plastic product. The present application can use a smaller pressure of the first liquid, so that the processing of the plastic product can be kept within a stable range, which can improve the processing quality of the plastic product.

[0060] In some embodiments, the first liquid is a cooling liquid. It should be noted that, in the process of forming the plastic product, the plastic preheated to a flowing state is added to the area between the male mold and the female mold for subsequent forming process, and it is only necessary to spray an appropriate amount of heated liquid to the male mold to maintain the plastic state required for forming. In the process of shaping the plastic product, a large amount of cooling liquid needs to be sprayed to the male mold to quickly cool the formed plastic product, thereby improving the processing efficiency of the plastic product. When the first liquid is a cooling liquid, since the nozzle 12 is embedded in the first plate 111, and the side of the first plate 111 facing the male mold has a larger surface than the side of the first side plate 112 facing the male mold, a large number of nozzles 12 can be arranged on the first plate 111, so that a large amount of cooling liquid can be sprayed through multiple nozzles 12 to cool the male mold, so as to achieve rapid shaping of the plastic product, and improve the work efficiency of the staff in processing the plastic product.

[0061] Of course, the first liquid is optionally a heated liquid. When a large amount of heated liquid needs to be sprayed onto the male mold to maintain the plastic state required during molding, thereby improving the quality of the plastic molding process, the first liquid is set to be a heated liquid, and a large amount of heated liquid is continuously sprayed onto the male mold, thereby improving the processing quality and performance of the plastic product to meet the user's use requirements.

[0062] In some embodiments, the plate assembly 11 further includes a second plate 114 and a second side plate 115. The second plate 114 is provided with a liquid spraying port 1141, and the second side plate 115, the first plate 111, the second plate 114 and the first side plate 112 are arranged to form a receiving cavity. The first plate 111 further includes a first liquid inlet 1111, the first liquid inlet 1111 is used to allow the external second liquid to enter the receiving cavity, and the liquid spraying port 1141 is used to spray the second liquid out of the receiving cavity to act on the side of the male mold away from the female mold.

[0063] See also Figure 1, Figure 2 and Figure 3 , Figure 1 A schematic structural diagram of a liquid spraying device for a plastic molding machine in one embodiment of the present application is shown. Figure 2 A structural schematic diagram of a liquid spraying device for a plastic molding machine in one embodiment of the present application is shown from one viewing angle. Figure 3 A structural schematic diagram of a liquid spraying device of a plastic molding machine in an embodiment of the present application is shown from another perspective. In the process of molding and shaping the plastic product, the first liquid is injected through the liquid inlet end 121, and the first liquid is sprayed to the male mold through the liquid spraying end 122, and the second liquid is injected through the first liquid inlet 1111, and the second liquid is sprayed to the male mold through the liquid spraying port 1141. Exemplarily, the first liquid is a cooling liquid, and the second liquid is a heating liquid. By spraying the heating liquid and the cooling liquid to the male mold respectively, it is convenient for the staff to select the liquid required in different processing processes of the plastic product, and it is convenient for the staff to operate. At the same time, in the processing of the plastic product, the probability of the staff adding unnecessary liquid is reduced.

[0064] In some embodiments, the liquid spraying device 1 for a plastic molding machine further comprises a first liquid discharge port 13, which is disposed through the first plate 111 and is used to discharge the first liquid and / or the second liquid. Figure 3 , Figure 3 The structural schematic diagram of the liquid spraying device of the plastic molding machine in one embodiment of the present application is shown in another perspective. In the process of processing the plastic product, as the processing proceeds, the temperature of the first liquid and / or the second liquid will change due to the processing. Since the first liquid discharge port 13 is used to discharge the first liquid and / or the second liquid, the first liquid and / or the second liquid that have acted on the punch can be discharged through the first liquid discharge port 13 after the action occurs, and the first liquid and / or the second liquid that have not acted on the punch can continue to act on the punch through the liquid spraying end 122 and / or the liquid spraying port 1141, which can improve the effect of the first liquid and / or the second liquid on the punch, thereby improving the processing quality and performance of the plastic product. In addition, since the first liquid discharge port 13 is used to discharge the first liquid and / or the second liquid, it can avoid the phenomenon that the first liquid and / or the second liquid are added but not discharged to cause internal blockage of the liquid spraying device 1 of the plastic molding machine, so that the internal space of the liquid spraying device 1 of the plastic molding machine can be kept smooth at all times, and the safety of the use of the liquid spraying device 1 of the plastic molding machine can be improved.

[0065] In some embodiments, the liquid spraying device 1 for a plastic molding machine further includes a liquid inlet assembly 14. Figure 3 and Figure 4 , Figure 3 A structural schematic diagram of a liquid spraying device for a plastic molding machine in one embodiment of the present application is shown from another perspective. Figure 4 Shows Figure 1 The liquid inlet assembly 14 is arranged on the side of the first plate body 111 away from the open cavity 113, and the liquid inlet assembly 14 includes a plurality of liquid inlet joints 141 and a plurality of liquid inlet adapters 142. The liquid inlet joints 141 include a second liquid inlet 1411 and a plurality of second liquid discharge ports 1412. One ends of the plurality of liquid inlet adapters 142 are connected to the liquid inlet ends 121 of the plurality of nozzles 12 in a one-to-one correspondence, and the other ends of the plurality of liquid inlet adapters 142 are connected to the plurality of second liquid discharge ports 1412 in a one-to-one correspondence. The second liquid inlet 1411 is used for the external first liquid to enter.

[0066] Specifically, when the liquid inlet ends 121 of the multiple nozzles 12 are connected to the external liquid supply device, multiple connecting pipes are required between the multiple nozzles 12 and the external liquid supply device, which will cause confusion in the connection between the multiple nozzles 12 and the external liquid supply device. At the same time, if the external liquid supply device is directly connected to the multiple nozzles 12, the multiple nozzles 12 will divert and reduce the pressure of the liquid provided by the liquid supply device, so that the pressure between each nozzle 12 cannot meet the requirements of plastic product processing.

[0067] Furthermore, in this embodiment, by connecting one end of the plurality of liquid inlet adapters 142 to the liquid inlet ends 121 of the plurality of nozzles 12 in a one-to-one correspondence, and the other end of the plurality of liquid inlet adapters 142 to the plurality of second liquid discharge ports 1412 in a one-to-one correspondence, the confusion between the plurality of nozzles 12 and the external liquid supply device can be reduced by switching between the liquid inlet adapters 142 and the liquid inlet connectors 141, thereby facilitating the use of the liquid spray device 1 of the plastic molding machine. In addition, since the liquid provided by the liquid supply device is graded and diverted layer by layer through the liquid inlet connectors 141 and the liquid inlet adapters 142 between the plurality of nozzles 12, the liquid pressure at the plurality of nozzles 12 can be accurately controlled by controlling the pressure at the liquid inlet connectors 141 and / or the liquid inlet connectors, so that the liquid pressure at the plurality of nozzles 12 meets the use requirements of plastic products in the production and processing process.

[0068] Optionally, the liquid spraying device 1 for plastic molding machine further comprises a guide assembly, which is arranged on the side of the first plate 111 away from the open cavity 113. In the process of relative movement between the punch and the die for mold opening and mold closing, precise positioning is required. By arranging the guide assembly on the side of the first plate 111 away from the open cavity 113, on the one hand, the first plate 111 can be fixed by the guide assembly to maintain the overall stability of the liquid spraying device 1 for plastic molding machine; on the other hand, precise positioning can be performed in the process of mold opening and mold closing between the punch and the die, thereby avoiding scratching of the punch and the die, and improving the service life of the punch and the die.

[0069] A plastic molding machine provided in an embodiment of the present application comprises a male mold, a female mold and a plastic molding machine liquid spraying device 1. The plastic molding machine is used to process plastic products to produce products that meet user needs through plastic molding of the plastic products.

[0070] Among them, the punch is a part in the mold product used to shape the inner surface of the plastic product, and the die is a part in the mold product used to shape the outer surface of the plastic product. Under the joint action of the relative movement of the punch and the die, the corresponding liquid is sprayed in cooperation with the plastic molding machine spray device 1, so as to shape the plastic product in the softened flow state and shape it into the required product.

[0071] Specifically, during the molding process of the plastic product, the plastic product in a softened flow state is arranged between the male mold and the female mold. At this time, the liquid spraying device 1 of the plastic molding machine sprays out heated liquid, so that during the molding process of the plastic product, the plastic product always remains in a softened flow state, and the plastic product is molded into a desired structure and shape through the relative movement of the male mold relative to the female mold; during the shaping process of the plastic product, the male mold remains relatively still relative to the female mold. At this time, the liquid spraying device 1 of the plastic molding machine sprays out cooling liquid, so as to harden and shape the plastic product, so as to process a plastic product that meets user needs.

[0072] Furthermore, since the nozzle 12 in the liquid spraying device 1 of the plastic molding machine of the present application is embedded in the first plate body 111, the fence plate on the side of the punch away from the die will not collide with the nozzle 12, and will not damage the nozzle 12, so that the nozzle 12 can work normally, and the liquid spraying effect of the liquid spraying device 1 of the plastic molding machine can be improved. At the same time, when designing the structure, size and position of the fence plate on the back of the punch, the designer does not need to consider the collision with the nozzle 12 due to factors such as the structure, size and position of the fence plate, which improves the work efficiency of the designer in designing the punch and reduces the error rate of the designer in the design process.

[0073] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A liquid spraying device for a plastic molding machine, applied to a three-plate mold, wherein the three-plate mold comprises a male mold and a female mold, and is characterized in that: The liquid spraying device of the plastic molding machine comprises: A plate assembly, used to fix the male mold, the plate assembly comprising a first plate and a first side plate, the first plate and the first side plate are arranged to form an open cavity; The nozzle is embedded in the first plate body, and includes a liquid inlet end and a liquid spray end. The liquid inlet end is used for allowing an external first liquid to enter, and the liquid spray end is used for spraying the first liquid to act on the side of the male mold away from the female mold.

2. The liquid spraying device for a plastic molding machine according to claim 1, characterized in that: Along the thickness direction of the first plate body, the distance between the liquid inlet end and the liquid spray end is less than or equal to the thickness of the first plate body.

3. The liquid spraying device for a plastic molding machine according to claim 1, characterized in that: The flow cross-sectional area of ​​the liquid inlet end is smaller than the flow cross-sectional area of ​​the liquid spray end.

4. The liquid spraying device for a plastic molding machine according to claim 1, characterized in that: There are a plurality of nozzles, and the plurality of nozzles are evenly distributed along the surface of the first plate.

5. The liquid spraying device for a plastic molding machine according to claim 1, characterized in that: When the pressure of the first liquid entering the liquid inlet end is less than or equal to 0.3 MPa, the distance of the liquid sprayed out by the liquid spray end is greater than or equal to the distance between the liquid spray end and the side of the male mold away from the female mold.

6. The liquid spraying device for a plastic molding machine according to any one of claims 1 to 5, characterized in that: The first liquid is a cooling liquid.

7. The liquid spraying device for a plastic molding machine according to any one of claims 1 to 5, characterized in that: The plate assembly also includes: A second plate body, wherein the second plate body is provided with a liquid spraying port; A second side plate, which is surrounded by the first plate body, the second plate body and the first side plate to form a receiving cavity; The first plate body also includes a first liquid inlet, which is used to allow an external second liquid to enter the accommodating cavity, and the liquid spraying port is used to spray the second liquid out of the accommodating cavity to act on the side of the male mold away from the female mold.

8. The liquid spraying device for a plastic molding machine according to claim 7, characterized in that: The liquid spraying device of the plastic molding machine also includes: The first liquid discharge port is provided through the first plate body and is used for discharging the first liquid and / or the second liquid.

9. The liquid spraying device for a plastic molding machine according to any one of claims 1 to 5, characterized in that: The liquid spraying device of the plastic molding machine also includes: A liquid inlet assembly is arranged on a side of the first plate body away from the open cavity, the liquid inlet assembly includes a plurality of liquid inlet joints and a plurality of liquid inlet adapters, the liquid inlet joints include a second liquid inlet and a plurality of second liquid discharge ports, one end of the plurality of liquid inlet adapters is connected to the liquid inlet ends of the plurality of nozzles in a one-to-one correspondence, the other end of the plurality of liquid inlet adapters is connected to the plurality of second liquid discharge ports in a one-to-one correspondence, and the second liquid inlet is used for allowing the first liquid from the outside to enter.

10. A plastic molding machine, comprising a male mold, a female mold and the liquid spraying device for plastic molding machine according to any one of claims 1 to 9.

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