Injection mold for producing a negative pressure extraction tube

Abstract

The application discloses an injection mold for producing a negative pressure air exhaust pipe and relates to the technical field of injection molds.The injection mold comprises a movable mold plate and a fixed mold plate, the movable mold plate is provided with a movable mold core, the fixed mold plate is provided with a fixed mold core, opposite surfaces of the movable mold core and the fixed mold core are each provided with an air exhaust pipe cavity channel, a flow channel and a plurality of interface channels, the air exhaust pipe cavity channel of the movable mold core and the fixed mold core cooperatively form an air exhaust pipe cavity, the flow channel cooperatively forms a flow channel, and the interface channels cooperatively form interface cavities; the fixed mold plate is slidably connected with a mold core rod matched with the air exhaust pipe cavity and a slider corresponding to the interface channels one by one, the mold core rod is axially moved, and the movable mold plate drives the slider to slide, so that the mold closing and mold opening of the injection mold are realized.The mold core rod and the mold core support rod are demolded in two directions through the fixed mold plate slidably connected with the mold core rod and the slider and the slider connected with the mold core support rod, and the problem that the existing injection mold cannot meet the production of the negative pressure air exhaust pipe is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of injection molds, and particularly relates to an injection mold for producing a negative pressure air pipe. BACKGROUND

[0002] The injection mold is a tool for producing plastic products. Injection molding is a processing method commonly used in batch production of some complex-shaped parts. Specifically, the method refers to injecting high-temperature molten material into a mold cavity, and obtaining a shaped product after cooling and solidification.

[0003] The existing negative pressure air pipe often has multiple interfaces arranged in the axial direction, facilitating the connection of multiple branch pipes through the pipe. However, the axial direction of the interface is perpendicular to the axial direction of the negative pressure air pipe. During demolding, the mold core of the negative pressure air pipe and the mold core of the interface need to be demolded in two directions. The existing injection mold has a single demolding mode, which cannot meet the production requirements of the negative pressure air pipe. SUMMARY

[0004] The purpose of the present application is to provide an injection mold for producing a negative pressure air pipe. The mold core rod and the sliding block are connected by the sliding connection of the fixed mold plate. The mold core rod and the mold core rod are connected by the sliding block, so that the mold core rod and the mold core rod are demolded in two directions. The problem that the existing injection mold cannot meet the production requirements of the negative pressure air pipe is solved.

[0005] To solve the above technical problems, the present application is realized by the following technical scheme:

[0006] The present application is an injection mold for producing a negative pressure air pipe, comprising a movable mold plate, a movable mold base plate, a fixed mold plate and a fixed mold base plate. The movable mold plate is provided with a movable mold core, and the fixed mold plate is provided with a fixed mold core. The opposite surfaces of the movable mold core and the fixed mold core are provided with an air pipe cavity groove, a flow channel groove and a plurality of interface grooves distributed along the air pipe cavity groove. The flow channel groove and the interface groove are in communication with the air pipe cavity groove. After clamping, the air pipe cavity groove of the movable mold core and the fixed mold core cooperates to form an air pipe cavity, the flow channel groove cooperates to form a flow channel, and the interface groove cooperates to form an interface cavity. The fixed mold plate is slidably connected with a mold core rod matched with the air pipe cavity, and a sliding block corresponding to the interface groove. The mold core rod is connected with a driving device for driving the mold core rod to move axially, realizing clamping and unclamping. The sliding block is fixedly connected with a mold core rod matched with the interface cavity, and the sliding block is provided with a inclined hole. The movable mold plate is fixedly connected with an inclined guide rod corresponding to the sliding block, which is used to move the movable mold plate, and the inclined guide rod cooperates with the inclined hole to drive the sliding block to slide, realizing clamping and unclamping.

[0007] As a preferred technical scheme of the present application, the mold core rod is provided with a counterbore corresponding to the mold core rod, which is used to insert the end of the mold core rod into the counterbore after clamping.

[0008] As a preferred technical scheme of the present application, the interface channel is flared at one end close to the slider, so that the interface cavity is a tapered hole structure at one end close to the slider; the mold core support rod comprises a straight rod segment and a circular table segment, which are used to cooperate with the tapered hole structure of the interface cavity after the mold core support rod is inserted into the interface cavity.

[0009] As a preferred technical scheme of the present application, the slider is connected with a spring on the side surface, one end of the spring abuts against the side surface of the fixed mold core, which is used to push the slider away from the fixed mold core by the spring when the mold is opened.

[0010] As a preferred technical scheme of the present application, the mold core rod is in a hollow structure and is connected with the cooling device through a pipeline, which is convenient for cooling the mold core rod.

[0011] As a preferred technical scheme of the present application, the fixed mold core is provided with a through groove distributed along the runner channel, a ejector rod is inserted into the through groove, one end of the ejector rod close to the fixed mold plate is connected with a compression spring, and the other end is provided with a groove adapted to the runner channel, which is used to make the groove flush with the runner channel by extruding the ejector rod through the movable mold core after the mold is closed, and to make the molded product of the runner be demolded by pushing the ejector rod outward by the compression spring after the mold is opened.

[0012] As a preferred technical scheme of the present application, the movable mold core is provided with a sink groove corresponding to the ejector rod, and the sink groove is fixedly connected with an insert block, the insert block is provided with a second groove, and the insert block abuts against the ejector rod to form a complete runner by cooperation of the groove and the second groove with the runner channel when the mold is closed.

[0013] As a preferred technical scheme of the present application, the fixed mold plate is fixedly connected with a guide seat, the guide seat is fixedly inserted with a guide sleeve; one end of the mold core rod has a guide segment matched with the guide sleeve.

[0014] As a preferred technical scheme of the present application, the fixed mold plate is slidingly connected with a mounting seat, and the mold core rod is fixedly connected with the mounting seat; the mounting seat is in a wedge-shaped structure, and the movable mold plate is provided with a limiting sink groove matched with the mounting seat.

[0015] As a preferred technical scheme of the present application, the opposite surfaces of the movable mold core and the fixed mold core are both provided with two side-by-side arranged air-pumping pipe cavity channels, and the number of the mold core rods is two and matched with the air-pumping pipe cavity channels one by one.

[0016] The present application has the following beneficial effects:

[0017] The application connects the mold core rod and the sliding block through the fixed mold plate, connects the mold core support rod through the sliding block, drives the mold core rod by the driving device, and matches the inclined guide rod of the movable mold plate with the inclined hole of the sliding block, so that the sliding block is driven to slide when the mold is opened, the mold core rod and the mold core support rod can independently move in two directions for demolding, and the negative pressure exhaust pipe is produced by injection molding, so that the production demand of the product is ensured.

[0018] Of course, it is not necessary for any product embodying the present application to achieve all of the above advantages simultaneously. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed for the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0020] Figure 1 It is a structure schematic diagram of the injection mold for producing the negative pressure exhaust pipe of the present application.

[0021] Figure 2 It is a front view of the present application. Figure 1

[0022] Figure 3 It is a side view of the present application. Figure 2

[0023] Figure 4 It is a sectional view of A-A in the present application. Figure 2

[0024] Figure 5 It is a sectional view of B-B in the present application. Figure 3

[0025] Figure 6 It is a local enlarged view of A part in the present application. Figure 5

[0026] Figure 7 It is a structure schematic diagram of the movable mold.

[0027] Figure 8 It is a local enlarged view of B part in the present application. Figure 7

[0028] Figure 9 It is a structure schematic diagram of the fixed mold, the mold core rod and the negative pressure exhaust pipe.

[0029] Figure 10 It is a sectional view of C-C in the present application. Figure 9

[0030] Figure 11 It is a sectional view of C-C in the present application.​​​​​​​Figure 10 Partial enlarged view of the middle C part;

[0031] Figure 12 Structural schematic view of the fixed die;

[0032] Figure 13 Structural schematic view of the fixed die; Figure 12 Partial enlarged view of the middle D part;

[0033] Figure 14 Structural schematic view of the core rod;

[0034] Figure 15 Structural schematic view of the slider;

[0035] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0036] 1 - moving die plate, 2 - fixed die plate, 3 - core rod, 4 - slider, 5 - ejector rod, 6 - ejector plate, 10 - moving die base plate, 11 - moving die core, 20 - fixed die base plate, 21 - fixed die core, 100 - runner channel, 101 - air extraction pipe cavity channel, 102 - interface channel, 103 - inclined guide rod, 104 - insert block, 105 - second channel, 106 - limit sink, 201 - guide seat, 301 - counterbore, 302 - guide section, 303 - mounting seat, 400 - core support rod, 401 - inclined hole, 402 - straight rod section, 403 - circular table section, 404 - spring, 501 - compression spring, 502 - channel, 601 - ejector pin. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] In the description of the present application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the indicated component or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0039] Embodiment one

[0040] Please refer to Figures 1 to 4As shown, the present application is a kind of production of negative pressure suction pipe injection mold, movable die and fixed die. Among them, the movable die includes movable die plate 1, movable die base plate 10, movable die plate 1 is fixed by movable die base plate 10, fixed die includes fixed die plate 2 and fixed die base plate 20, fixed die plate 2 is connected with fixed die base plate 20 by spacer, and, fixed die plate 2 and fixed die base plate 20 are provided with ejector plate 6, ejector plate 6 is connected with several ejector pins 601, for driving ejector pin 601 by ejector plate 6 when opening mold, using ejector pin 601 to push injection completed negative pressure suction pipe to demould.

[0041] As shown in Figure 5 , 7 , 9 and 13, movable die plate 1 is provided with rectangular sink, and rectangular sink is provided with movable die kernel 11, and fixed die plate 2 is also provided with rectangular sink, and fixed die kernel 21 is installed and arranged in rectangular sink.

[0042] The opposite surface of movable die kernel 11 and fixed die kernel 21 is provided with suction pipe cavity groove 101, flow channel groove 100 and several interface grooves 102 distributed along suction pipe cavity groove 101, and flow channel groove 100 and interface groove 102 are communicated with suction pipe cavity groove 101.

[0043] Specifically, two suction pipe cavity grooves 101 are arranged on movable die kernel 11 and fixed die kernel 21, two suction pipe cavity grooves 101 are arranged side by side, flow channel groove 100 is located between two suction pipe cavity grooves 101 and is communicated with two suction pipe cavity grooves 101 respectively. Several interface grooves 102 are arranged on the outer side of two suction pipe cavity grooves 101.

[0044] As shown in Figure 9 , after clamping, suction pipe cavity is formed by cooperating suction pipe cavity groove 101 of movable die kernel 11 and fixed die kernel 21, flow channel is formed by cooperating flow channel groove 100, and interface cavity is formed by cooperating interface groove 102.

[0045] As shown in Figures 9 to 12 And 14, the fixed die plate 2 is slidably connected with the mold core rod 3 matched with the suction pipe cavity, and the slider 4 corresponding to the interface groove 102, the mold core rod 3 is connected with the driving device, for driving the mold core rod 3 to move axially, realizing clamping and opening mold.

[0046] Among them, the fixed die plate 2 is fixedly connected with the guide seat 201, and the guide sleeve is fixedly inserted into the guide seat 201; one end of the mold core rod 3 has a guide section 302 matched with the guide sleeve. The number of mold core rods 3 is two, and they are matched with the suction pipe cavity groove 101 one by one.

[0047] The fixed mold plate 2 is slidingly connected with a mounting seat 303, two mold core rods 3 are fixedly connected with the mounting seat 303, and the driving device drives the mounting seat 303 to move, thereby synchronously driving the two mold core rods 3 to axially slide.

[0048] Meanwhile, the mounting seat 303 is in a wedge-shaped structure, and the movable mold plate 1 is provided with a limiting sink groove 106 matched with the mounting seat 303, so that the limiting sink groove 106 on the movable mold plate 1 cooperates with the wedge-shaped structure of the mounting seat 303 after the mold is closed, thereby improving the limiting effect of the mounting seat 303 and ensuring the position accuracy of the mounting seat 303.

[0049] As shown in Figure 6 , 11 and 15, the sliding block 4 is fixedly connected with a mold core support rod 400 matched with the interface cavity, and the sliding block 4 is provided with an inclined hole 401, and the movable mold plate 1 is fixedly connected with an inclined guide rod 103 corresponding to the sliding block 4, for moving the movable mold plate 1, driving the sliding block 4 to slide by cooperation of the inclined guide rod 103 and the inclined hole 401, and realizing mold closing and mold opening.

[0050] Specifically, during mold closing, the two mold core rods 3 are driven by the mounting seat 303 to move to a specified position, and during movement of the movable mold plate 1 towards the fixed mold plate 2, the inclined guide rod 103 cooperates with the inclined hole 401, so that the sliding block 4 moves towards the position close to the mold core rod 3, and the mold core support rod 400 is inserted into the interface cavity formed by the interface groove 102, and the end of the mold core support rod 400 abuts against the mold core rod 3.

[0051] During injection molding, the molten material is filled into the mold core rod 3 and the air extraction pipe cavity, and the mold core support rod 400 and the interface cavity, and after cooling, the negative pressure air extraction pipe 7 is formed, and the position of the mold core support rod 400 and the interface cavity forms an interface on the negative pressure air extraction pipe 7, thereby producing the negative pressure air extraction pipe 7 with multiple interfaces.

[0052] During production, the injection mold is in a posture that the mold core rod 3 is vertically arranged for injection molding. During mold opening, the driving device drives the two mold core rods 3 to axially move, and the movable mold plate 1 moves away from the fixed mold plate 2, and the inclined guide rod 103 drives the sliding block 4 to move away from the mold core rod 3, so that the mold core support rod 400 is extracted, thereby enabling the negative pressure air extraction pipe 7 to automatically fall off after mold opening, and completing demolding.

[0053] Example Two

[0054] Based on example one, as shown in Figure 6 and 14 , the mold core rod 3 is in a hollow structure and is connected with a cooling device through a pipeline, so that cooling water can be introduced after injection molding is completed, thereby facilitating cooling of the mold core rod 3 and realizing rapid cooling and molding of the negative pressure air extraction pipe 7.

[0055] Meanwhile, the mold core rod 3 is provided with a counterbore 301 corresponding to the mold core support rod 400, which is used to insert the end of the mold core support rod 400 into the counterbore 301 after the mold is closed, so that the mold core support rod 400 is in close contact with the counterbore 301, and the gap between the mold core support rod 400 and the mold core rod 3 is avoided, so that the occurrence of burrs in the negative pressure suction pipe 7 is avoided, thereby improving the overall product quality.

[0056] Embodiment three

[0057] As shown in Figs. Figure 8 , 13 and 15, the interface channel 102 is flared at one end close to the slider 4, so that the interface cavity is a tapered hole structure at one end close to the slider 4. The mold core support rod 400 includes a straight rod section 402 and a circular table section 403, which is used to cooperate with the tapered hole structure of the interface cavity after the mold core support rod 400 is inserted into the interface cavity, so that the mold core support rod 400 is in close contact with the interface cavity, thereby improving the overall sealing performance and avoiding burrs at the interface of the negative pressure suction pipe 7.

[0058] In addition, the slider 4 is provided with a mounting hole on the side surface, and a spring 404 is connected in the mounting hole. One end of the spring 404 abuts against the side surface of the fixed mold core 21, which is used to push the slider 4 away from the fixed mold core 21 by the spring 404 when the mold is opened, so that the mold core support rod 400 can be pulled out of the interface cavity, thereby improving the reliability of demolding.

[0059] Embodiment four

[0060] As shown in Figs. Figure 8 , 11 and 13, the fixed mold core 21 is provided with a through groove distributed along the runner channel 100, which blocks the runner channel 100, and the top rod 5 is inserted into the through groove. One end of the top rod 5 close to the fixed mold plate 2 is connected with a compression spring 501, and the other end is provided with a channel 502 corresponding to the runner channel 100. The compression spring 501 pushes the top rod 5 outward, so that the top rod 5 protrudes from the fixed mold core 21. The lower end side of the top rod 5 has a limiting protrusion, which can limit the extension length of the top rod 5.

[0061] After the mold is closed, the top rod 5 is extruded by the movable mold core 11, so that the channel 502 is flush with the runner channel 100. After the mold is opened, the top rod 5 is pushed outward by the compression spring 501, so that the molded product of the runner is demolded.

[0062] Meanwhile, the movable mold core 11 is provided with a counterbore corresponding to the top rod 5, and the counterbore is fixedly connected with an insert 104. The insert 104 is provided with a second channel 105, which is used to abut against the top rod 5 by the insert 104 when the mold is closed, and the complete runner is formed by the cooperation of the channel 502, the second channel 105 and the runner channel 100.

[0063] Through the cooperation of the insert 104 and the ejector pin 5, the wear of the movable mold core 11 caused by the ejector pin 5 can be avoided, and when the insert 104 is worn, only the insert 104 needs to be replaced, thereby effectively improving the service life of the injection mold, and the repair convenience and maintenance efficiency of the injection mold.

[0064] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0065] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present specification. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. An injection mold for producing a negative pressure air exhaust pipe, comprising a movable mold plate (1), a movable mold base plate (10), a fixed mold plate (2) and a fixed mold base plate (20), characterized in that: the movable mold plate (1) is provided with a movable mold core (11), the fixed mold plate (2) is provided with a fixed mold core (21), the opposite surfaces of the movable mold core (11) and the fixed mold core (21) are each provided with an air exhaust pipe cavity channel (101), a flow channel (100) and a plurality of interface channels (102) distributed along the air exhaust pipe cavity channel (101), and the flow channel (100) and the interface channel (102) are in communication with the air exhaust pipe cavity channel (101), after clamping, the air exhaust pipe cavity channel (101) of the movable mold core (11) and the fixed mold core (21) cooperate to form an air exhaust pipe cavity, the flow channel (100) cooperates to form a flow channel, and the interface channel (102) cooperates to form an interface cavity; the fixed mold plate (2) is slidably connected with a mold core rod (3) matched with the air exhaust pipe cavity, and a slider (4) corresponding to the interface channel (102), the mold core rod (3) is connected with a driving device for driving the mold core rod (3) to move axially to realize clamping and unclamping; the slider (4) is fixedly connected with a mold core support rod (400) matched with the interface cavity, and the slider (4) is provided with an inclined hole (401), the movable mold plate (1) is fixedly connected with an inclined guide rod (103) corresponding to the slider (4), for moving the movable mold plate (1) to drive the slider (4) to slide by cooperation of the inclined guide rod (103) and the inclined hole (401), thereby realizing clamping and unclamping; wherein the fixed mold core (21) is provided with a through slot distributed along the flow channel (100), a ejector rod (5) is inserted into the through slot, one end of the ejector rod (5) close to the fixed mold plate (2) is connected with a compression spring (501), and the other end is provided with a slot (502) matched with the flow channel (100), for extruding the ejector rod (5) by the movable mold core (11) after clamping to make the slot (502) flush with the flow channel (100), and for ejecting the molded flow channel by pushing the ejector rod (5) outward by the compression spring (501) after unclamping; the movable mold core (11) is provided with a sink (corresponding to the ejector rod (5)), the sink is fixedly connected with an insert block (104), the insert block (104) is provided with a second slot (105), and the insert block (104) abuts against the ejector rod (5) during clamping to form a complete flow channel by cooperation of the slot (502) and the second slot (105) with the flow channel (100). the mold core rod (3) is provided with a counterbore (301) corresponding to the mold core support rod (400), for inserting the end of the mold core support rod (400) into the counterbore (301) after clamping.

2. An injection mold for producing a negative pressure vent tube according to claim 1, characterized in that the end of the interface channel (102) close to the slider (4) is in a flared structure, so that the end of the interface cavity close to the slider (4) is a tapered hole structure.

3. An injection mold for producing a negative pressure vent tube according to claim 1 or 2, characterized in that ​ The mold core support rod (400) comprises a straight rod section (402) and a circular table section (403), which are used for cooperating with the tapered hole structure of the interface cavity after the mold core support rod (400) is inserted into the interface cavity.

4. The injection mold for producing a negative pressure suction tube according to claim 1, wherein The slider (4) is connected with a spring (404) on the side, one end of the spring (404) abuts against the side of the fixed mold core (21), which is used for pushing the slider (4) away from the fixed mold core (21) through the spring (404) when the mold is opened.

5. An injection mold for producing a negative pressure vent tube according to claim 1 or 2, characterized in that The mold core rod (3) is in a hollow structure and is connected with the cooling device through a pipeline, so that the mold core rod (3) can be cooled conveniently.

6. The injection mold for producing a negative pressure suction tube according to claim 1, wherein The fixed mold plate (2) is fixedly connected with a guide seat (201), the guide seat (201) is fixedly inserted with a guide sleeve; one end of the mold core rod (3) is provided with a guide section (302) matched with the guide sleeve.

7. An injection mold for producing a negative pressure vent tube according to claim 1 or 6, characterized in that The fixed mold plate (2) is slidably connected with a mounting seat (303), the mold core rod (3) is fixedly connected with the mounting seat (303); the mounting seat (303) is in a wedge-shaped structure, and the movable mold plate (1) is provided with a limiting sink groove (106) matched with the mounting seat (303).

8. An injection mold for producing a negative pressure vented tube according to claim 7, characterized in that The opposite surfaces of the movable mold core (11) and the fixed mold core (21) are both provided with two air-pumping pipe cavity grooves (101) arranged side by side, the number of the mold core rods (3) is two, and the mold core rods (3) are matched with the air-pumping pipe cavity grooves (101) one by one.

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