Injection mold for forming thin-wall long pipe product

Abstract

The utility model relates to the technical field of injection molds, and provides an injection mold for forming a thin-wall long pipe product, a front mold part comprises a front mold plate provided with a push cylinder, a rear mold part comprises a rear mold push plate and a rear mold support plate, a panel with a front mold insert pin is connected above the front mold plate, and a rear mold insert pin is connected above the rear mold support plate. The lower portion of the rear mold supporting plate is connected with a bottom plate provided with an ejector sleeve needle, a first ejector plate connected with an ejector sleeve and a second ejector plate connected with a rear mold push plate are arranged between the bottom plate and the rear mold supporting plate, and the bottom plate, the first ejector plate and the second ejector plate are connected through a buckling machine. According to the utility model, a multi-demoulding structure is adopted, the front mould plate pushes the panel to demould and separate through the cylinder before demoulding, the front mould insert pin is drawn out in advance, and the rear mould push plate is controlled to be far away from the bottom plate through the buckling machine before the ejector sleeve ejects a product, so that the ejector sleeve pin is separated in advance, automatic demoulding of the product is realized, and the packaging force of the product is reduced through multi-demoulding; the risk of deformation or fracture of the front and rear die structures of the product is reduced, and the quality of the thin-wall long pipe product is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for forming thin-walled long tube products. Background Art

[0002] An injection mold is a tool for producing plastic products. It is currently commonly used in the production and molding of various injection molded parts such as tubes and covers. In the prior art, injection molds are generally formed by front and rear mold cores, and are ejected once using a combination of an inlay pin and an ejector sleeve. During the ejection process, the product is subjected to a large clamping force in the product glue cavity, making demolding difficult. There is a risk of the front mold sticking off, and the rear mold part is easily deformed by the ejector sleeve, posing a risk of material strain. In addition, for general injection molds, plastic products with deep ribs are usually ejected separately using an ejector sleeve, an ejector pin, etc., and often only one ejection is needed to meet the demand. However, for some thin-walled long tube products, one-time ejection often has problems such as not being able to achieve full automation or not being able to guarantee the size of the plastic product. Conventional injection molds are difficult to meet the production needs of such special products. Utility Model Content

[0003] Based on this, the purpose of the utility model is to provide an injection mold for forming a thin-walled long tube product in view of the deficiencies in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A plastic injection mold for forming a thin-walled long tube product, comprising a front mold part and a rear mold part, the front mold part comprising a front mold plate with a front mold core installed, the rear mold part comprising a rear mold push plate and a rear mold support plate, the rear mold core installed in the rear mold push plate, characterized in that a panel is connected to the top of the front mold plate, the panel is connected to a front mold inlay pin that matches the front mold core, the front mold plate is provided with a pushing cylinder for pushing the panel, the rear mold support plate is fixedly connected to the bottom plate below, a sleeve needle that matches the rear mold core is connected to the bottom plate, a movable first ejector plate and a second ejector plate are arranged between the rear mold support plate and the bottom plate, a sleeve is fixed inside the first ejector plate, the second ejector plate is connected to the rear mold push plate, and the bottom plate, the first ejector plate and the second ejector plate are connected by a buckle machine.

[0006] As a further improvement of the present invention, the front template is connected to the panel by screws of equal height, and elastic glue is provided between the front template and the panel.

[0007] As a further improvement of the present invention, the buckle machine includes a buckle machine body, a pull hook and an insertion rod. The buckle machine body is provided with a pull hook groove for the pull hook to pass through and an insertion rod groove for the insertion rod to pass through. A spring block is installed inside the buckle machine body through a spring, and the spring block is provided with a spring block hook groove matching the pull hook.

[0008] As a further improvement of the present invention, the draw hook is connected to the first ejector plate, the latch machine body is connected to the second ejector plate, and the insertion rod is connected to the bottom plate.

[0009] As a further improvement of the present invention, the first ejector plate includes a first ejector panel and a first ejector bottom plate, and the second ejector plate includes a second ejector panel and a second ejector bottom plate.

[0010] As a further improvement of the utility model, a first return pin is fixed inside the first ejector plate, a second return pin is fixed inside the second ejector plate, and the second ejector plate is fixedly connected to the rear mold push plate through the second return pin.

[0011] As a further improvement of the present invention, a front mold guide column is arranged between the panel and the front template, the front mold guide column is fixed to the panel, a front mold guide sleeve matched with the front mold guide column is arranged in the front template, a rear mold guide column is arranged between the rear mold support plate, the rear mold push plate and the front template, the rear mold guide column is fixed to the rear mold support plate, and a rear mold guide sleeve matched with the rear mold guide column is arranged in the rear mold push plate and the front template.

[0012] As a further improvement of the utility model, a middle bracket penetrating the first ejector plate and the second ejector plate is fixed inside the bottom plate, the other end of the middle bracket is fixed to the rear mold support plate, and a middle bracket guide sleeve matching the middle bracket is arranged inside the first ejector plate and the second ejector plate.

[0013] As a further improvement of the utility model, a power pull rod connected to the injection molding machine is fixed inside the first ejector plate.

[0014] As a further improvement of the utility model, the front mold core and the rear mold core cooperate to form a product glue position cavity, a heat insulation plate is provided above the panel, and a hot nozzle is installed on the panel through a fixing ring.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model provides an injection mold for forming thin-walled long tube products. The injection mold adopts a controllable multiple demolding structure. Before separating the front template and the rear mold push plate, the cylinder provides power to demold the front template and the panel, thereby pulling out the front mold inlay pin in advance. Before the ejector ejects the product, the latch structure controls the rear mold push plate and the ejector to move synchronously away from the bottom plate, so that the ejector pin on the bottom plate is detached in advance, realizing automatic demolding of the product. Multiple demolding reduces the clamping force on the product during demolding, reduces the risk of deformation or breakage of the front and rear mold structures of the product, effectively ensures the quality of thin-walled long tube products, and improves the qualified rate of plastic products.

[0017] 2. The front mold part of the utility model adopts the structure of connecting the front mold plate and the panel with equal height screws, so as to control the mold opening stroke. The elastic glue arranged between the front mold plate and the panel provides instantaneous power for demoulding. The pushing cylinder arranged on the front mold plate provides lasting thrust, so as to complete the separation of the front mold inlay pin connected to the panel and the front mold core. The motion structure is simple and stable, and the demoulding process is simple and reliable, which ensures the precise positioning of the demoulding structure and extends the service life of the mold.

[0018] The second ejector plate and the rear mold push plate connected to the second ejector plate stop moving, so that the ejector pin can be ejected out of the rear mold core, and the ejector pin can be ejected out of the rear mold core by the ejector pin connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Attached Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Attached Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model.

[0022] Attached Figure 3 It is an exploded view of the overall structure of the utility model.

[0023] Attached Figure 4 It is a cross-sectional schematic diagram of the overall structure of the utility model in an exploded state.

[0024] Attached Figure 5 It is a partial structural schematic diagram of the buckle machine part of the utility model.

[0025] Attached Figure 6It is an exploded view of the buckle machine structure of the utility model.

[0026] Attached Figure 7 This is a cross-sectional view of the explosion state of the trigger structure of the utility model.

[0027] In the figure: 1 is the front mold plate, 2 is the front mold core, 3 is the panel, 4 is the front mold insert, 5 is the push cylinder, 6 is the equal height screw, 7 is the elastic glue, 8 is the rear mold push plate, 9 is the rear mold core, 10 is the rear mold support plate, 11 is the bottom plate, 12 is the sleeve needle, 13 is the first ejector plate, 1301 is the first ejector panel, 1302 is the first ejector bottom plate, 14 is the sleeve, 15 is the second ejector plate, 1501 is the second ejector panel, 1502 is The second ejector bottom plate, 16 is a button machine, 1601 is a button machine body, 1602 is a draw hook, 1603 is an insert rod, 1604 is a spring, 1605 is a spring block, 17 is a first return needle, 18 is a second return needle, 19 is a front mold guide column, 20 is a front mold guide sleeve, 21 is a rear mold guide column, 22 is a rear mold guide sleeve, 23 is a middle arm, 24 is a middle arm guide sleeve, 25 is a power pull rod, 26 is a heat insulation plate, 27 is a fixing ring, and 28 is a hot nozzle. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1 , Figure 3 As shown, an injection mold for forming a thin-walled long tube product includes a front mold part and a rear mold part, wherein the front mold part includes a front mold plate 1 with a front mold core 2 installed, and the rear mold part includes a rear mold push plate 8 and a rear mold support plate 10, wherein a rear mold core 9 is installed in the rear mold push plate 8, and the front mold mold 1 is characterized in that a panel 3 is connected to the top of the front mold plate 1, and a front mold inserting pin 4 matching the front mold core 2 is connected to the panel 3, and the front mold inserting pin 4 is used for molding the front mold part of the injection molding product. The front mold plate 1 is provided with a pushing cylinder 5 for pushing the panel 3, and the rear mold support plate 10 is provided with a pushing cylinder 5 for pushing the panel 3. The bottom is fixedly connected to the bottom plate 11, and the bottom plate 11 is connected with a sleeve needle 12 that cooperates with the rear mold core 9. The sleeve needle 12 is used for molding the rear mold part of the injection molded product. A movable first ejector plate 13 and a second ejector plate 15 are arranged between the rear mold support plate 10 and the bottom plate 11. A sleeve 14 is fixed inside the first ejector plate 13, and the sleeve 14 is used to eject the injection molded product. The second ejector plate 15 is connected to the rear mold push plate 8. The bottom plate 11, the first ejector plate 13 and the second ejector plate 15 are connected by a buckle machine 16.

[0030] Preferably, the rear mold support plate 10 is connected to the bottom plate 11 by screws.

[0031] In a specific embodiment, further, the front template 1 is connected to the panel 3 by means of equal height screws 6, and the equal height screws 6 are used to limit the demolding distance between the front template 1 and the panel 3. An elastic glue 7 is arranged between the front template 1 and the panel 3, and the elastic glue 7 is used to provide instantaneous power for demolding.

[0032] In a specific embodiment, further, the latch machine 16 includes a latch machine body 1601, a hook 1602 and an insertion rod 1603, the latch machine body 1601 is provided with a hook groove for the hook 1602 to pass through and an insertion rod groove for the insertion rod 1603 to pass through, the latch machine body 1601 is provided with a spring block 1605 movably installed through a spring 1604, and the spring block 1605 is provided with a spring block hook groove matching the hook 1602.

[0033] Preferably, the draw hook 1602 is provided with a buckle end for clamping the elastic block 1605 , and the insertion rod 1603 is provided with an insertion rod protrusion for squeezing the elastic block 1605 .

[0034] In a specific embodiment, further, the draw hook 1602 is connected to the first ejector plate 13 , the latch body 1601 is connected to the second ejector plate 15 , and the insert rod 1603 is connected to the bottom plate 11 .

[0035] Preferably, the components of the locking machine 16 are symmetrically arranged at both ends of the ejector plate and the bottom plate 11 to stably drive the ejector plate and the bottom plate 11 to move synchronously.

[0036] In a specific embodiment, further, the first ejector plate 13 includes a first ejector panel 1301 and a first ejector bottom plate 1302, and the second ejector plate 15 includes a second ejector panel 1501 and a second ejector bottom plate 1502. The combined structure of the ejector panel and the ejector bottom plate is more convenient for assembling other components and is easier to process.

[0037] In a specific embodiment, further, a first return pin 17 is fixed inside the first ejector plate 13, and the first return pin 17 is used to reset the first ejector plate 13. A second return pin 18 is fixed inside the second ejector plate 15, and the second ejector plate 15 is fixedly connected to the rear mold push plate 8 through the second return pin 18. The second return pin 18 is used to reset the second ejector plate 15 and eject and reset the rear mold push plate 8.

[0038] Preferably, the second return pin 18 is screwed to the rear mold push plate 8 .

[0039] In a specific embodiment, further, a front mold guide pin 19 is arranged between the panel 3 and the front template 1, and the front mold guide pin 19 is fixed to the panel 3. A front mold guide sleeve 20 matched with the front mold guide pin 19 is arranged in the front template 1, and the front mold guide pin 19 cooperates with the front mold guide sleeve 20 to complete the guided sliding of the front template 1, and a rear mold guide pin 21 is arranged between the rear mold support plate 10, the rear mold push plate 8 and the front template 1, and the rear mold guide pin 21 is fixed to the rear mold support plate 10, and a rear mold guide sleeve 22 matched with the rear mold guide pin 21 is arranged in the rear mold push plate 8 and the front template 1, and the rear mold guide pin 21 cooperates with the rear mold guide sleeve 22 to complete the guided sliding of the rear mold push plate 8 and the front template 1.

[0040] In a specific embodiment, further, a middle bracket 23 penetrating the first ejector plate 13 and the second ejector plate 15 is fixed inside the bottom plate 11, and the other end of the middle bracket 23 is fixed to the rear mold support plate 10, and a middle bracket guide sleeve 24 cooperating with the middle bracket 23 is provided inside the first ejector plate 13 and the second ejector plate 15, and the middle bracket 23 cooperates with the middle bracket guide sleeve 24 to complete the guided sliding of the first ejector plate 13 and the second ejector plate 15.

[0041] In a specific embodiment, further, a power pull rod 25 connected to the injection molding machine is fixed inside the first ejector plate 13 .

[0042] In a specific embodiment, further, the front mold core 2 and the rear mold core 9 cooperate to form a product glue position cavity, a heat insulation plate 26 is provided above the panel 3, and the panel 3 is installed with a hot nozzle 28 through a fixing ring 27, and the hot nozzle 28 is used to inject material into the product glue position cavity, thereby completing the product injection molding through the cooperation of the front mold insert needle 4 and the sleeve needle 12 in the product glue position cavity.

[0043] The specific working process is as follows: when the product is injection molded, the molten plastic flows into the product mold cavity through the hot nozzle 28, and after pressure holding and cooling, the product is formed;

[0044] When the first demoulding is performed, the cylinder 5 is started to push the panel 3 to separate from the front mold plate 1, thereby driving the front mold inserting pin 4 to separate from the front mold core 2, so that the front mold inserting pin 4 can be separated from the molded product;

[0045] During the second demoulding, the injection molding machine drives the rear mold part of the injection mold to separate from the front mold part, so that the front mold plate 1 is separated from the rear mold push plate 8, and the front mold core 2 is separated from the molded product;

[0046] When the third demolding is performed, the injection molding machine drives the first ejector plate 13 to be ejected toward the front mold part through the power pull rod 25, and the draw hook 1602 connected to the first ejector plate 13 drives the buckle machine body 1601 to move synchronously toward the front mold part, so that the second ejector plate 15 connected to the buckle machine body 1601 moves synchronously with the first ejector plate 13 toward the front mold part, and then the rear mold push plate 8 is driven by the second ejector plate 15 to move toward the front mold part away from the bottom plate 11, and the sleeve pin 12 is separated from the rear mold core 9, so that the sleeve pin 12 is separated from the molded product.

[0047] When the fourth demolding is performed, the hook 1602 drives the clamping spring block 1605 to move to the raised part on the insertion rod 1603, and the spring block 1605 is squeezed and slided by the raised structure on the insertion rod 1603, so that the hook 1602 slides into the spring block hook groove on the spring block 1605 and separates from the buckle machine body 1601, and the buckle machine body 1601 stops moving, and the second ejector plate 15 and the rear mold push plate 8 connected to the second ejector plate 15 stop moving. At this time, the first ejector plate 13 continues to move toward the direction of the front mold part, driving the sleeve 14 to eject the product in the rear mold core 9, and all the demolding actions are completed.

[0048] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

[0049] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. An injection mold for molding a thin-walled long tube product, comprising a front mold part and a rear mold part, wherein the front mold part comprises a front mold plate (1) on which a front mold core (2) is installed, and the rear mold part comprises a rear mold push plate (8) and a rear mold support plate (10), wherein a rear mold core (9) is installed in the rear mold push plate (8), characterized in that: A panel (3) is connected to the top of the front mold plate (1), a front mold inserting pin (4) matching with the front mold core (2) is connected to the panel (3), a pushing cylinder (5) for pushing the panel (3) is provided on the front mold plate (1), the bottom of the rear mold support plate (10) is fixedly connected to the bottom plate (11), a sleeve needle (12) matching with the rear mold core (9) is connected to the bottom plate (11), a movable first ejector plate (13) and a second ejector plate (15) are arranged between the rear mold support plate (10) and the bottom plate (11), a sleeve needle (14) is fixed inside the first ejector plate (13), the second ejector plate (15) is connected to the rear mold push plate (8), and the bottom plate (11), the first ejector plate (13) and the second ejector plate (15) are connected via a buckle machine (16).

2. The injection mold for forming a thin-walled long tube product according to claim 1, characterized in that: The front template (1) and the panel (3) are connected via equal-height screws (6), and an elastic glue (7) is provided between the front template (1) and the panel (3).

3. The injection mold for forming a thin-walled long tube product according to claim 1, characterized in that: The locking machine (16) comprises a locking machine body (1601), a draw hook (1602) and an insertion rod (1603); a draw hook groove for the draw hook (1602) to pass through and an insertion rod groove for the insertion rod (1603) to pass through are provided inside the locking machine body (1601); a spring block (1605) is movably installed inside the locking machine body (1601) via a spring (1604); and a spring block draw hook groove matching the draw hook (1602) is provided inside the spring block (1605).

4. The injection mold for forming a thin-walled long tube product according to claim 3, characterized in that: The draw hook (1602) is connected to the first ejector plate (13), the latch body (1601) is connected to the second ejector plate (15), and the insertion rod (1603) is connected to the bottom plate (11).

5. The injection mold for forming a thin-walled long tube product according to claim 1, characterized in that: The first ejector plate (13) comprises a first ejector panel (1301) and a first ejector bottom plate (1302), and the second ejector plate (15) comprises a second ejector panel (1501) and a second ejector bottom plate (1502).

6. The injection mold for forming a thin-walled long tube product according to claim 1, characterized in that: A first return pin (17) is fixed inside the first ejector plate (13), a second return pin (18) is fixed inside the second ejector plate (15), and the second ejector plate (15) is fixedly connected to the rear mold push plate (8) via the second return pin (18).

7. The injection mold for forming a thin-walled long tube product according to claim 1, characterized in that: A front mold guide column (19) is arranged between the panel (3) and the front mold plate (1), the front mold guide column (19) is fixed to the panel (3), a front mold guide sleeve (20) matching with the front mold guide column (19) is arranged in the front mold plate (1), a rear mold guide column (21) is arranged between the rear mold support plate (10), the rear mold push plate (8) and the front mold plate (1), the rear mold guide column (21) is fixed to the rear mold support plate (10), and a rear mold guide sleeve (22) matching with the rear mold guide column (21) is arranged in the rear mold push plate (8) and the front mold plate (1).

8. The injection mold for forming a thin-walled long tube product according to claim 1, characterized in that: A middle bracket (23) penetrating the first ejector plate (13) and the second ejector plate (15) is fixed inside the bottom plate (11); the other end of the middle bracket (23) is fixed to the rear mold support plate (10); and a middle bracket guide sleeve (24) matching the middle bracket (23) is arranged inside the first ejector plate (13) and the second ejector plate (15).

9. The injection mold for forming a thin-walled long tube product according to claim 1, characterized in that: A power pull rod (25) connected to the injection molding machine is fixed inside the first ejector plate (13).

10. The injection mold for forming a thin-walled long tube product according to claim 1, characterized in that: The front mold core (2) and the rear mold core (9) cooperate to form a product glue position cavity, a heat insulation plate (26) is provided above the panel (3), and a hot nozzle (28) is installed on the panel (3) via a fixing ring (27).

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