Injection mold capable of exhausting air

Abstract

The utility model provides an exhaust injection mold, which comprises a lower mold and an upper mold, the upper mold and the lower mold are closed to form a cavity, the upper mold is provided with a mounting hole, and an exhaust component is slidably mounted in the mounting hole; the exhaust assembly comprises a limiting part, a first spring and a sliding block, the sliding block slides in the mounting hole, the limiting part is mounted on the upper die and used for limiting the sliding block, the limiting part and the upper die are connected through the first spring, an air channel communicated with the cavity is formed in the sliding block, and the air channel is communicated with the air channel. The sliding block is provided with a first exhaust hole used for communicating the air channel with the outside. According to the injection mold, the problems that high-temperature and high-pressure gas is formed in the injection mold during injection processing in the prior art, the gas is difficult to discharge from the injection mold, the injection mold is damaged, and bubbles or defects are easily generated on the surface of a finished product can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold capable of exhausting air. Background Art

[0002] Injection molds are tools for producing plastic products. They inject the heated and molten plastic into the mold cavity under high pressure by an injection molding machine, and obtain the molded product after cooling and solidification. Injection molding production has the advantages of fast speed, high efficiency and simple operation.

[0003] After the existing injection mold is formed, it is not convenient to demold the product, which greatly slows down the work efficiency. In order to solve the problems existing in the prior art, the utility model with publication number CN221112726U discloses a plastic pallet injection mold (hereinafter referred to as: prior art 1) comprising a frame, the top of both ends of the frame are fixedly connected with electric telescopic rods, the top end of the electric telescopic rod is fixedly connected with a mounting plate, the bottom of the mounting plate is fixedly connected with a movable mold, the frame is fixedly connected with a bearing plate, the bearing plate is fixedly connected with a support plate, the support plate is provided with a slot, the slot is provided with a fixed mold, the bottom of the bearing plate is fixedly connected with a motor, the output end of the motor is fixedly connected with a driving wheel, both sides of the driving wheel are provided with driven wheels, the driving wheel and the driven wheel are connected by a connecting belt, the driven wheel is fixedly inserted with a connecting sleeve, the connecting sleeve is rotatably connected to the bottom of the frame, and a threaded rod is inserted into the inner thread of the connecting sleeve.

[0004] Although prior art 1 is convenient for demolding the molded workpiece, high-temperature and high-pressure gas will be formed in the injection mold during the injection molding process. The gas is difficult to discharge in the injection mold, which will cause damage to the injection mold and make bubbles or defects easily appear on the surface of the finished product. Utility Model Content

[0005] The purpose of the utility model is to provide an injection mold with exhaust gas, which can solve the problem in the prior art that high-temperature and high-pressure gas will be formed in the injection mold during injection molding, and the gas is difficult to be discharged in the injection mold, which will cause damage to the injection mold and make bubbles or defects easily appear on the surface of the finished product.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] An injection mold capable of exhausting gas comprises a lower mold and an upper mold, wherein the upper mold and the lower mold surround a molding cavity when the molds are closed, and a mounting hole is provided on the upper mold, and an exhaust assembly is slidably mounted in the mounting hole;

[0008] The exhaust assembly includes a limiting part, a first spring and a sliding block, the sliding block slides in the mounting hole, the limiting part is mounted on the upper die and is used to limit the sliding block, the limiting part and the upper die are connected through the first spring, an air passage communicating with the cavity is arranged in the sliding block, and a first exhaust hole for connecting the air passage with the outside is arranged on the sliding block;

[0009] The upper mold is provided with an injection channel for injecting raw materials into the mold cavity.

[0010] Preferably, there are a plurality of first exhaust holes, and the plurality of first exhaust holes are arranged at equal intervals along the circumferential direction of the sliding block.

[0011] Preferably, the limiting portion and the first exhaust hole are arranged alternately.

[0012] Preferably, a second exhaust hole connected to the airway is provided below the first exhaust hole.

[0013] Preferably, a gas collecting groove is provided on one side of the air passage close to the cavity.

[0014] Preferably, a collecting hopper is installed at the feed inlet of the injection channel.

[0015] Preferably, a material taking assembly is slidably mounted on the lower die.

[0016] Preferably, the material taking assembly comprises a push rod and a push plate, the push rod is slidably mounted on the lower die, and one end of the push rod away from the cavity is fixedly connected to the push plate.

[0017] Preferably, a guide rod is fixedly connected to the lower mold, and the top plate is slidably mounted on the guide rod.

[0018] Preferably, a second spring is fixedly connected to the lower die, and one end of the second spring away from the lower die is fixedly connected to the top plate.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] In the utility model, the feed end of the injection channel is used to connect with the injection device, and the injection device injects the melted raw material into the cavity through the injection channel; when the injection device does not inject the raw material into the cavity, the first exhaust hole is not connected to the outside world under the blocking of the upper mold, thereby preventing impurities in the outside air from entering the cavity;

[0021] When the injection device injects raw material into the cavity, as the raw material enters the cavity, the high-temperature and high-pressure gas generated in the cavity moves upward to the air channel. After the high-temperature and high-pressure gas enters the air channel, it can push the sliding block to move vertically upward. At this time, the first spring connecting the limit part and the sliding block is compressed. After the first exhaust hole arranged on the sliding block moves upward with the sliding block to be connected with the outside world, the high-temperature and high-pressure gas entering the air channel can be discharged from the cavity to the outside world through the air channel and the first exhaust hole, thereby avoiding bubbles or defects on the surface of the injection molded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a three-dimensional diagram of the utility model.

[0024] Figure 2 It is a structural schematic diagram of the utility model.

[0025] Figure 3 For this utility model Figure 2 A partial enlarged view of point A in the middle.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 101-lower mold, 102-upper mold, 103-cavity, 104-mounting hole, 105-exhaust assembly, 106-limiting part, 107-first spring, 108-sliding block, 109-second spring, 110-first exhaust hole, 111-injection channel, 112-second exhaust hole, 113-gas collecting groove, 114-collecting hopper, 115-material taking assembly, 116-top rod, 117-top plate, 118-guide rod. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0029] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0032] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0034] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0035] See also Figure 1-Figure 3 This embodiment discloses an injection mold capable of exhausting, comprising a lower mold 101 and an upper mold 102, wherein the upper mold 102 and the lower mold 101 surround a molding cavity 103 when the molds are closed, and a mounting hole 104 is provided on the upper mold 102, and an exhaust component 105 is slidably mounted in the mounting hole 104;

[0036] The exhaust assembly 105 includes a limiting portion 106, a first spring 107 and a sliding block 108, wherein the sliding block 108 slides in the mounting hole 104, the limiting portion 106 is mounted on the upper die 102 and is used to limit the sliding block 108, the limiting portion 106 and the upper die 102 are connected via the first spring 107, an air passage communicating with the cavity 103 is provided in the sliding block 108, and a first exhaust hole 110 for communicating the air passage with the outside is provided on the sliding block 108;

[0037] The upper mold 102 is provided with an injection channel 111 for injecting raw materials into the mold cavity 103 .

[0038] In the present invention, the first exhaust hole 110 is arranged at the top of the sliding block 108, and the feeding end of the injection channel 111 is used to connect with the injection device, and the injection device injects the molten raw material into the cavity 103 through the injection channel 111; when the injection device does not inject the raw material into the cavity 103, the first exhaust hole 110 is not connected with the outside world under the blocking of the upper mold 102, so as to prevent impurities in the outside air from entering the cavity 103; when the injection device injects the raw material into the cavity 103, as the raw material enters the cavity 103, the high-temperature and high-pressure gas generated in the cavity 103 moves upward to the airway, and the high-temperature and high-pressure gas can push the sliding block 108 to move vertically upward after entering the airway. At this time, the first spring 107 connecting the limiting portion 106 and the sliding block 108 is compressed, and the setting After the first exhaust hole 110 on the sliding block 108 moves upward with the sliding block 108 to be connected to the outside, the high-temperature and high-pressure gas entering the airway can be discharged from the cavity 103 to the outside through the airway and the first exhaust hole 110, thereby avoiding bubbles or defects on the surface of the injection molded product; if part of the injection molding material enters the airway during the exhaust process, it can be removed during the subsequent processing; when the high-temperature and high-pressure gas generated in the cavity 103 is discharged, the sliding part moves vertically downward under the action of the first spring 107 to resist elastic deformation, and after the first exhaust hole 110 set on the interactive part moves into the mounting hole 104, the upper mold 102 re-blocks the first exhaust hole 110, and the first exhaust hole 110 is no longer connected to the outside; in this embodiment, the injection device is a conventional device in the prior art, and its structure and function are not explained one by one here.

[0039] In some embodiments, there are a plurality of first exhaust holes 110, and the plurality of first exhaust holes 110 are arranged at equal intervals along the circumference of the sliding block 108. By arranging the plurality of first exhaust holes 110 at equal intervals along the circumference of the sliding block 108, the high-temperature and high-pressure gas entering the gas passage can be uniformly exhausted through the first exhaust holes 110.

[0040] In some embodiments, the limiting portion 106 is staggered with the first exhaust hole 110. By staggering the limiting portion 106 with the first exhaust hole 110, it is possible to prevent the limiting portion 106 from blocking the exhaust of the first exhaust hole 110 after the first exhaust hole 110 moves to communicate with the outside.

[0041] In some embodiments, a second exhaust hole 112 connected to the air passage is provided below the first exhaust hole 110. There are a plurality of second exhaust holes 112, which are arranged at equal intervals along the circumferential direction of the sliding block 108; after the second exhaust holes 112 are moved to communicate with the outside under the push of the high-temperature and high-pressure gas formed in the cavity 103 by the sliding block 108, the exhaust efficiency can be further improved when there is a large amount of high-temperature and high-pressure gas formed in the cavity 103; the first exhaust hole 110 and the second exhaust hole 112 are both arranged obliquely toward the air passage, and the inclined first exhaust holes 110 and the second exhaust holes 112 can guide the high-temperature and high-pressure gas in the air passage, thereby further accelerating the exhaust efficiency.

[0042] In some embodiments, a gas collecting groove 113 is provided on one side of the gas channel close to the mold cavity 103. The gas collecting groove 113 is used to guide the high-temperature and high-pressure gas formed in the mold cavity 103 into the gas channel.

[0043] In some embodiments, a collecting hopper 114 is installed at the feed inlet of the injection channel 111. The collecting hopper 114 is used to guide the raw materials injected into the injection channel 111, thereby further improving the injection efficiency.

[0044] In some embodiments, a material taking assembly 115 is slidably mounted on the lower mold 101. The material taking assembly 115 is used to drive the injection molded product to separate from the lower mold 101 after the injection molding is completed.

[0045] In some embodiments, the material taking assembly 115 includes a push rod 116 and a top plate 117 . The push rod 116 is slidably mounted on the lower mold 101 , and one end of the push rod 116 away from the cavity 103 is fixedly connected to the top plate 117 . After the injection molding is completed, the upper mold 102 is separated from the lower mold 101; when the injection molded product needs to be removed from the lower mold 101, the lower mold 101 is first fixed, and the top plate 117 is pressed to make the top plate 117 move vertically upward, and the ejector rod 116 fixedly connected to the top plate 117 moves upward under the drive of the top plate 117 until it contacts the injection molded product. After the ejector rod 116 contacts the injection molded product, the injection molded product is separated from the lower mold 101 under the action of the ejector rod 116, so that the injection molded product can be removed from the lower mold 101; in this embodiment, there are four ejector rods 116, and the ends of the four ejector rods 116 away from the cavity 103 are fixedly connected to the top plate 117; in this embodiment, a telescopic device is connected to the bottom end of the top plate, and the telescopic device is used to drive the top plate to move. The telescopic device recorded in this embodiment is a driving device commonly used in the prior art, and its structure and principle are not explained one by one here.

[0046] In some embodiments, a guide rod 118 is fixedly connected to the lower mold 101, and the top plate 117 is slidably mounted on the guide rod 118. The guide rod 118 can guide the top plate 117, so that the top plate 117 and the top rod 116 connected to the top plate 117 can move more stably.

[0047] In some embodiments, the lower mold 101 is fixedly connected with a second spring 109, and one end of the second spring 109 away from the lower mold 101 is fixedly connected to the top plate 117. When the top plate 117 drives the ejector 116 to move upward, the second spring 109 connected to the lower mold 101 and the top plate 117 is compressed. When the ejector 116 contacts the injection molded product and drives the injection molded product to separate from the lower mold 101, the top plate 117 can drive the ejector 116 to reset under the action of the second spring 109 to resist elastic deformation. The second spring 109 can prevent the ejector 116 from moving too fast when the top plate 117 is pressed to drive the ejector 116 to move, resulting in damage to the injection molded product after the ejector 116 collides with the injection molded product.

[0048] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold capable of exhausting air, comprising a lower mold (101) and an upper mold (102), wherein the upper mold (102) and the lower mold (101) enclose a molding cavity (103) when the molds are closed, characterized in that: The upper mold (102) is provided with a mounting hole (104), and an exhaust assembly (105) is slidably mounted in the mounting hole (104); The exhaust assembly (105) comprises a limiting portion (106), a first spring (107) and a sliding block (108); the sliding block (108) slides in the mounting hole (104); the limiting portion (106) is mounted on the upper die (102) and is used to limit the sliding block (108); the limiting portion (106) and the upper die (102) are connected via the first spring (107); an air passage communicating with the cavity (103) is arranged in the sliding block (108); and a first exhaust hole (110) for communicating the air passage with the outside is arranged on the sliding block (108); The upper mold (102) is provided with an injection channel (111) for injecting raw materials into the mold cavity (103).

2. The ventable injection mold according to claim 1, characterized in that: There are a plurality of first exhaust holes (110), and the plurality of first exhaust holes (110) are arranged at equal intervals along the circumferential direction of the sliding block (108).

3. The ventable injection mold according to claim 2, characterized in that: The limiting portion (106) and the first exhaust hole (110) are arranged alternately.

4. The ventable injection mold according to claim 3, characterized in that: A second exhaust hole (112) communicating with the air passage is provided below the first exhaust hole (110).

5. The ventable injection mold according to claim 1, characterized in that: A gas collecting groove (113) is provided on one side of the air passage close to the mold cavity (103).

6. The ventable injection mold according to claim 1, characterized in that: A collecting hopper (114) is installed at the material inlet of the injection channel (111).

7. The ventable injection mold according to claim 1, characterized in that: A material taking assembly (115) is slidably mounted on the lower die (101).

8. The ventable injection mold according to claim 7, characterized in that: The material taking assembly (115) comprises a push rod (116) and a top plate (117); the push rod (116) is slidably mounted on the lower mold (101); and one end of the push rod (116) away from the mold cavity (103) is fixedly connected to the top plate (117).

9. The ventable injection mold according to claim 8, characterized in that: A guide rod (118) is fixedly connected to the lower mold (101), and the top plate (117) is slidably mounted on the guide rod (118).

10. The ventable injection mold according to claim 9, characterized in that: A second spring (109) is fixedly connected to the lower die (101), and one end of the second spring (109) away from the lower die (101) is fixedly connected to the top plate (117).

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