Mold frame of opening and closing structure

Abstract

The utility model discloses a mold frame with an opening and closing structure, which comprises a front fixing plate, an injection molding opening is communicated with the center of the front end of the front fixing plate, a front mold is arranged at the rear end of the front fixing plate, a rear mold is arranged at the rear end of the front mold, a bearing plate is arranged at the rear end of the rear mold, and spacing plates are arranged on the upper side and the lower side of the rear end of the bearing plate. A rear fixing plate is arranged at the rear ends of the two spacing plates, two needle plates are arranged at the front end of the rear fixing plate, a connecting column at the front end of the ejector pin is elastically connected with an ejector head through a buffer spring, the ejection force is gradually increased along with forward sliding of the ejector pin, and the pushing force of the ejector pin can be buffered through the buffer spring; and the return spring is arranged between the needle plate and the bearing plate, so that after demolding is finished, the needle plate can return to the original position under the action of the return spring, the ejector pin and the ejector head are driven to return to the original position, preparation is made for next injection molding, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold frame with an opening and closing structure. Background Art

[0002] In the field of mold technology, traditional mold bases often have some problems during the injection molding process. For example, during the demoulding process, the demoulding method is relatively simple and inefficient, which can easily cause damage to the molded product.

[0003] At the same time, traditional molds are difficult to adjust the timing of demolding, making them inadequate for the demolding needs of products of varying sizes. Furthermore, some mold components are inconvenient to maintain and replace, increasing maintenance costs and time. Therefore, a new mold frame with an open-close structure is needed to address these issues. Utility Model Content

[0004] The main purpose of the utility model is to provide a mold frame with an opening and closing structure, aiming to solve the problems in the above background technology that the traditional mold frame demoulding method is easy to cause damage to the molded product and the demoulding timing is difficult to adjust.

[0005] In order to solve the above problems, the utility model proposes a mold frame with an opening and closing structure, including a front fixed plate, an injection port connected to the center of the front end of the front fixed plate, a front mold is provided at the rear end of the front fixed plate, a rear membrane is provided at the rear end of the front mold, a supporting plate is provided at the rear end of the rear membrane, spacer plates are provided on the upper and lower sides of the rear end of the supporting plate, a rear fixed plate is provided at the rear ends of the two spacer plates, two needle plates are provided at the front end of the rear fixed plate, and the two needle plates are slidably connected between the two spacer plates.

[0006] In one embodiment, positioning pins are provided at the four corners of the rear end of the front mold, and positioning sleeves are provided at the four corners of the front end of the rear film.

[0007] In one embodiment, the positioning pin is inserted into the positioning sleeve and is slidably connected to the positioning sleeve.

[0008] In one embodiment, a plurality of ejector pins are passed through the front needle plate, and limiting posts are passed through the left and right sides of the front end of the front needle plate.

[0009] In one embodiment, the ejector pin passes through the interior of the carrier plate through a pinhole, and the ejector pin is slidably connected inside the pinhole, and a square connecting column is fixedly connected to the front end of the ejector pin.

[0010] In one embodiment, a cylindrical plug is sleeved on the exterior of the front end of the connecting post, and the connecting post is slidably connected to the interior of the rear end of the plug.

[0011] In an embodiment, the ejector pin penetrates into the rear film through the telescopic hole, and the ejector pin is slidingly connected in the telescopic hole, and the inner diameter of the telescopic hole is larger than the inner diameter of the pin hole.

[0012] In an embodiment, the front end of the connecting column is provided with a buffer spring, and the buffer spring is elastically connected in the ejector pin.

[0013] In an embodiment, the left and right sides between the needle plate and the supporting plate on the front side are provided with return springs, the front end of the limiting column is slidingly connected with a pull rod, and the rear side of the pull rod is externally sleeved with a pull ring.

[0014] In an embodiment, the pull ring is slidingly connected in the limiting column, a plurality of locking bolts are threadedly connected in the cylindrical outer wall of the pull ring, and the locking bolts are locked with the pull rod, and the plurality of pull rods are completely located in the pull ring.

[0015] Advantages:

[0016] 1. The connecting column at the front end of the ejector pin is elastically connected with the ejector pin through the buffer spring, the ejecting force gradually increases with the forward sliding of the ejector pin, the buffer spring can buffer the pushing force of the ejector pin, the damage to the formed product is prevented, the integrity of the product is ensured, the return spring is arranged between the needle plate and the supporting plate, after the demolding is completed, the needle plate can return to the original position under the action of the return spring, the ejector pin and the ejector pin can return to the original position, the next injection molding is prepared, and the working efficiency is improved.

[0017] 2. The pull ring is locked with the pull rod through the plurality of locking bolts, the position of the pull rod outside can be adjusted by loosening the locking bolts, the pull rod can adjust the demolding time according to the size of the formed product, and the flexibility and adaptability of demolding are improved.

[0018] 3. The pull rod and the pull ring can slide out of the rear end of the limiting column, the pull rod is fixedly connected with the front mold through the bolt, the pull rod and the pull ring can be taken out from the rear end of the limiting column by being fixed with the front mold, the position of the pull ring outside the pull rod can be more conveniently adjusted, and the pull rod and the pull ring are more conveniently maintained and replaced, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0020] Figure 1 is a mold frame three-dimensional structure schematic view of the present application;

[0021] Figure 2 is a mold frame three-dimensional section structure schematic view of the utility model;

[0022] Figure 3 is the utility model's Figure 2 enlarged view of A in the middle;

[0023] Figure 4 is the utility model's Figure 2 enlarged view of B in the middle.

[0024] The figure mark is explained as follows:

[0025] 1, front fixed plate;2, injection molding mouth;3, front mould;4, rear film;5, bearing plate;6, spacing plate;7, rear fixed plate;8, needle plate;9, positioning pin;10, positioning sleeve;11, thimble;12, limit column;13, needle hole;14, connecting column;15, top head;16, telescopic hole;17, buffer spring;18, return spring;19, pull rod;20, pull ring;21, locking bolt. Specific implementation

[0026] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), if the certain posture changes, the directional indications also change accordingly.

[0028] In the utility model, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, can also be detachable connection, or integral;Can be mechanical connection, can also be electrical connection;Can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0030] The utility model provides a kind of mold frame of opening and closing structure as Figures 1-4 As shown in a kind of mold frame of opening and closing structure, including front fixed plate 1, the front end center of front fixed plate 1 is communicated with injection port 2, front fixed plate 1 rear end is provided with front mould 3, and the rear end of front mould 3 is provided with rear film 4, and the rear end of rear film 4 is provided with bearing plate 5, and the upper and lower sides of the rear end of bearing plate 5 are provided with spacing plate 6, and the rear end of two spacing plates 6 is provided with rear fixed plate 7, and the front end of rear fixed plate 7 is provided with two needle plate 8, and two needle plate 8 is slidably connected between two spacing plates 6, and the inside of the rear end four corners of front mould 3 is provided with positioning pin 9, and the inside of the front end four corners of rear film 4 is provided with positioning sleeve 10, positioning pin 9 is inserted in the inside of positioning sleeve 10, and is slidably connected with positioning sleeve 10, in the process of injection by mold, front mould 3 and rear film 4 are positioned by positioning pin 9 and positioning sleeve 10, and after closing, the mold cavity between front mould 3 and rear film 4 is injected by injection port 2, after injection cooling, front mould 3 and rear film 4 open mould, and the product formed by injection is ejected by sliding forward through needle plate 8 and demoulding.

[0031] Preferably, a plurality of ejector pins 11 are penetrated in the inside of front needle plate 8, and the inside of the left and right sides of the front end of front needle plate 8 is penetrated upwardly with limiting column 12, and the ejector pin 11 is penetrated in the inside of bearing plate 5 through needle hole 13, and the ejector pin 11 is slidably connected in the inside of needle hole 13, in the process of sliding forward of needle plate 8, the sliding position between needle plate 8 and rear film 4 and bearing plate 5 can be limited by the limiting column 12 on both sides, and the plurality of ejector pins 11 are driven to slide forward to eject the product formed.

[0032] Preferably, the front end of the ejector pin 11 is fixedly connected with a square connecting column 14, the front end of the connecting column 14 is externally sleeved with a cylindrical ejector head 15, the connecting column 14 is slidably connected inside the rear end of the ejector head 15, the ejector head 15 penetrates inside the rear film 4 through the telescopic hole 16, the ejector head 15 is slidably connected inside the telescopic hole 16, the inner diameter of the telescopic hole 16 is larger than the inner diameter of the pin hole 13, the front end of the connecting column 14 is provided with a buffer spring 17 and is elastically connected inside the ejector head 15 through the buffer spring 17, when the ejector pin 11 slides forward, the ejector pin 11 pushes the ejector head 15 forward through the connecting column 14 and the buffer spring 17, the ejector head 15 slides out of the telescopic hole 16, and the molded product inside the front end of the rear film 4 is pushed, so that the molded product is ejected, since the connecting column 14 is elastically connected inside the rear end of the ejector head 15 through the buffer spring 17, the ejecting force of the ejector head 15 on the molded product gradually increases with the forward sliding of the ejector pin 11, and the pushing force of the ejector pin 11 can be buffered by the buffer spring 17, so that the molded product can be buffered by the ejector head 15 and the buffer spring 17 to prevent damage to the molded product.

[0033] In addition, when the needle plate 8 slides back to retract, the needle plate 8 drives the ejector pin 11 to slide back, since the front end of the ejector pin 11 is provided with a limiting ring inside the ejector head 15, the ejector pin 11 can drive the ejector head 15 to slide back through the limiting ring, and the rear end of the ejector head 15 is attached to the front end of the supporting plate 5, so that the ejector head 15 is completely retracted into the telescopic hole 16, and is flush with the inner wall of the rear end of the mold cavity of the rear film 4, without hindering the injection molding of the product.

[0034] Preferably, the left and right sides between the front needle plate 8 and the supporting plate 5 are provided with return springs 18, the front end inside the limiting column 12 is slidably connected with a pull rod 19, the rear side outside of the pull rod 19 is sleeved with a pull ring 20, the pull ring 20 is slidably connected inside the limiting column 12, a plurality of locking bolts 21 are threadedly connected inside the cylindrical outer wall of the pull ring 20, and are locked with the pull rod 19 and the pull ring 20, and the plurality of pull rods 19 are completely located inside the pull ring 20, during mold opening, the front mold 3 drives the pull rod 19 to slide forward inside the limiting column 12, and drives the pull ring 20 to slide forward through the pull rod 19, since the pull ring 20 cannot slide out of the front end opening of the limiting column 12, when the pull ring 20 slides to the front end opening of the limiting column 12, the pull rod 19 can drive the limiting column 12 to slide forward through the pull ring 20, and drive the two needle plates 8 to slide forward through the limiting column 12, so that the plurality of ejector pins 11 and the plurality of ejector heads 15 move forward, and the molded product is demolded, after demolding, the front mold 3 slides back again, the needle plate 8 returns to the original position under the action of the return spring 18, and drives the ejector pin 11 and the ejector head 15 to return to the original position.

[0035] Preferably, since the pull ring 20 is locked with the pull rod 19 through the plurality of locking bolts 21 and can be adjusted in position outside the pull rod 19 by loosening the locking bolts 21, the pull rod 19 can adjust the timing of demolding according to the size of the formed product, and the timing of demolding can be adjusted by adjusting the position of the pull ring 20.

[0036] Preferably, since the pull rod 19 and the pull ring 20 can slide out from the rear end of the limiting column 12, and the pull rod 19 is fixedly connected with the front mold 3 through the bolts, the pull rod 19 and the pull ring 20 can be taken out from the rear end of the limiting column 12 by being released from the front mold 3, so that the pull ring 20 is more convenient to adjust in position outside the pull rod 19, and the pull rod 19 and the pull ring 20 are more convenient to maintain and replace.

[0037] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields under the utility model concept of the present application, and the contents of the present application specification and drawings are included in the patent protection range of the present application.

Claims

1. A mold base with an opening and closing structure, characterized in that: The invention comprises a front fixing plate (1), wherein the center of the front end of the front fixing plate (1) is connected to an injection molding port (2), a front mold (3) is provided at the rear end of the front fixing plate (1), a rear film (4) is provided at the rear end of the front mold (3), a supporting plate (5) is provided at the rear end of the rear film (4), and a spacer plate (6) is provided on both the upper and lower sides of the rear end of the supporting plate (5), a rear fixing plate (7) is provided at the rear ends of the two spacer plates (6), and two needle plates (8) are provided at the front end of the rear fixing plate (7), and the two needle plates (8) are slidably connected between the two spacer plates (6).

2. A mold frame with an opening and closing structure as claimed in claim 1, characterized in that: Positioning pins (9) are provided at the four corners of the rear end of the front mold (3), and positioning sleeves (10) are provided at the four corners of the front end of the rear film (4).

3. The mold base with an opening and closing structure according to claim 2, characterized in that: The positioning pin (9) is inserted into the positioning sleeve (10) and is slidably connected to the positioning sleeve (10).

4. The mold base with an opening and closing structure according to claim 3, characterized in that: A plurality of ejector pins (11) are inserted forwardly into the interior of the needle plate (8) on the front side, and limiting posts (12) are inserted upwardly into the interior of both left and right sides of the front end of the needle plate (8) on the front side.

5. The mold frame with an opening and closing structure according to claim 4, characterized in that: The ejector pin (11) passes through the interior of the support plate (5) through the pinhole (13), and the ejector pin (11) is slidably connected inside the pinhole (13). A square connecting column (14) is fixedly connected to the front end of the ejector pin (11).

6. The mold base with an opening and closing structure according to claim 5, characterized in that: A cylindrical plug (15) is sleeved on the outside of the front end of the connecting column (14), and the connecting column (14) is slidably connected to the inside of the rear end of the plug (15).

7. The mold frame with an opening and closing structure according to claim 6, characterized in that: The plug (15) passes through the interior of the rear membrane (4) through the telescopic hole (16), and the plug (15) is slidably connected inside the telescopic hole (16). The inner diameter of the telescopic hole (16) is larger than the inner diameter of the needle hole (13).

8. The mold base with an opening and closing structure according to claim 7, characterized in that: The front end of the connecting column (14) is provided with a buffer spring (17), and is elastically connected to the inside of the head (15) through the buffer spring (17).

9. The mold base with an opening and closing structure according to claim 4, characterized in that: Return springs (18) are provided on both left and right sides between the needle plate (8) and the support plate (5) on the front side. A pull rod (19) is slidably connected to the interior of the front end of the limit column (12), and a pull ring (20) is sleeved on the exterior of the rear side of the pull rod (19).

10. The mold formwork with an opening and closing structure according to claim 9, characterized in that: The pull ring (20) is slidably connected to the inside of the limiting column (12), and the inner thread of the cylindrical outer wall of the pull ring (20) is connected with multiple locking bolts (21), and is locked with the multiple locking bolts (21) and the pull rod (19), and the multiple pull rods (19) are completely located inside the pull ring (20).

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