Four-side back-off demolding structure of plastic-iron integrated injection mold

Abstract

The utility model discloses a four-side back-off demoulding structure of a rubber-iron integrated injection mould, which comprises a front mould, a rear mould arranged below the front mould, a mould cavity formed between the parting surfaces of the front mould and the rear mould and used for rubber-iron molding, four pitched roofs respectively arranged on the four sides of a mould core of the rear mould, four sliding blocks respectively arranged on the four sides of the mould core of the rear mould, and a mould cover arranged on the mould cavity of the front mould and the rear mould. And the four pitched roofs are respectively mounted at four corners of the rear mold core and are connected end to end through sliding blocks to form a rectangular shape, and the pitched roofs are positioned on the rear side of the rear mold and the outer sides of the pitched roofs on the left side and the right side of the rear mold. According to the utility model, the vertical plate is driven to move downwards through the separation of the base plate and the plate B, so that the sliding block moves inwards synchronously, and further, the plate B is separated from the front mold and moves downwards to apply pressure to each angle ejector rod, so that the angle ejector rods drive the angle ejector to move inwards, and the angle ejector and a convex part on the sliding block are separated from an inverted buckle of a plastic iron product; and the plastic iron product can be directly ejected out, so that the forming quality of the plastic iron product is ensured.

Description

Technical Field

[0001] The utility model specifically relates to a four-sided undercut demoulding structure of a rubber-iron integrated injection mold. Background Art

[0002] Glue-iron is a composite material of glue and iron. In the process of glue-iron integrated injection molding, the molten glue for injection molding needs to enter the mold cavity through the preset gate runner. After the glue-iron product is cooled and formed, the ejector is used to eject the injected glue-iron product from the mold core.

[0003] At present, in order to make the molded rubber iron product have an undercut fixing counterpart during assembly, the existing rubber iron injection mold generally has a protrusion on the inclined top of the mold cavity and the outer side of the slider, such as Figure 8 As shown, the undercut is formed. However, after the rubber-iron product is formed, the undercut will hook the inclined ejector and the slider, affecting the ejection of the rubber-iron product, which needs to be improved.

[0004] Therefore, it is necessary to invent a four-sided undercut demoulding structure of a rubber-iron integrated injection mold to solve the above problems. Utility Model Content

[0005] (I) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes a four-sided undercut demolding structure of a rubber-iron integrated injection mold, by arranging inclined ejector rods at the bottom of the four inclined ejectors and arranging inclined plates inside the four sliding blocks, and by separating the pad plate from the B plate, the vertical plate is driven to move downward, so that the sliding blocks move inward synchronously, and further, by separating the B plate from the front mold, each inclined ejector rod is moved downward to apply pressure, so that it moves inward along the base, thereby driving the inclined ejector to move inward, so that the inclined ejector and the protrusion on the sliding block are separated from the undercut of the rubber-iron product, and the limit on the undercut is released. When the rubber-iron product is subsequently ejected, it can be directly ejected without being affected, thereby ensuring the molding quality of the rubber-iron product.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a four-sided undercut demoulding structure of a rubber-iron integrated injection mold,

[0009] It comprises a front mold and a rear mold arranged below the front mold, and a mold cavity for forming the glue iron is formed between the parting surfaces of the front mold and the rear mold;

[0010] There are four inclined tops, which are respectively installed on the four sides of the rear mold core;

[0011] There are four sliders, which are respectively installed at the four corners of the rear mold core;

[0012] The four inclined tops are connected end to end by sliders to form a rectangular shape, wherein the outer sides of the inclined tops located at the rear side and left and right sides of the rear mold, the left and right ends of the inclined tops located at the front side, and the outer sides of the four sliders are all provided with protrusions for forming the undercut of the rubber-iron product;

[0013] Also includes:

[0014] The inclined top driving assembly is arranged at the bottom of each inclined top, and is used to drive the inclined top to slide toward the inside of the mold cavity to make way for the undercut of the rubber-iron product;

[0015] The slider driving assembly is arranged at the bottom of each slide and is used to drive the slider to slide toward the inside of the mold cavity to make way for the undercut of the rubber-iron product.

[0016] Preferably, the rear mold is composed of a fixed plate, an ejector bottom plate, an ejector face plate, a pad plate, and a B plate in sequence from bottom to top, wherein the top of the middle of the B plate is concave downward to accommodate the mold core.

[0017] Preferably, each of the inclined roof drive assemblies comprises:

[0018] Two bases are mounted on the ejector bottom plate, and the tops of the two bases extend above the top of the ejector panel;

[0019] An inclined top rod is arranged on the top of each base and can slide along the width direction of the inclined top above the base;

[0020] The top end of each inclined ejector rod sequentially passes through the pad plate and the B plate to extend into the mold core, and is connected to the bottom end of the inclined ejector rod at the top end.

[0021] Preferably, each of the inclined ejector rods is arranged to be inclined, and the bottom end of the inclined ejector rod is inclined away from the center direction of the rear mold;

[0022] The pad, the B plate, and the mold core are provided with a first inclined hole for inserting the inclined ejector rod at each inclined ejector rod, and the diameter of the first inclined hole at the pad is lengthened.

[0023] Preferably, each of the slider drive assemblies comprises:

[0024] A vertical plate is installed on the pad;

[0025] The inclined plate is arranged inside the sliding block and connected to the top of the vertical plate, and the inclined angle is such that the bottom end is inclined away from the center direction of the rear mold.

[0026] Preferably, each of the sliding blocks is penetrated by a second inclined hole into which the inclined plate can be inserted.

[0027] Compared with the prior art, the above technical solution of the utility model has the following beneficial effects:

[0028] The utility model arranges inclined ejector rods at the bottoms of four inclined ejectors and inclined plates inside four slide blocks, and drives the vertical plate to move downward by separating the pad plate from the B plate, so that the slide blocks move inward synchronously. Furthermore, by separating the B plate from the front mold, the downward movement applies pressure to each inclined ejector rod, so that it moves inward along the base, thereby driving the inclined ejector to move inward, so that the inclined ejector and the protruding portion on the slide block are separated from the undercut of the rubber-iron product, releasing the limit on the undercut, and the rubber-iron product can be directly ejected without being affected when it is subsequently ejected, thereby ensuring the molding quality of the rubber-iron product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0031] Figure 2 This is a schematic diagram of the front mold and the rear mold of the utility model when they are molded together;

[0032] Figure 3 This is a schematic diagram of the rear mold of the utility model;

[0033] Figure 4 It is a front cross-sectional view of the rear mold of the utility model;

[0034] Figure 5 It is an oblique cross-sectional view of the rear mold of the utility model;

[0035] Figure 6 This is a distribution diagram of the inclined top drive assembly and the slider drive assembly of the utility model;

[0036] Figure 7 It is a schematic diagram of the inclined top driving assembly and the slider driving assembly of the utility model;

[0037] Figure 8 It is a schematic diagram of the protrusion structure of the utility model.

[0038] Description of reference numerals:

[0039] 1 front mold, 2 rear mold, 21 fixed plate, 22 ejector bottom plate, 23 ejector panel, 24 pad, 25 B plate, 3 inclined ejector, 4 slider, 5 protrusion, 6 inclined ejector drive assembly, 61 base, 62 inclined ejector rod, 7 slider drive assembly, 71 vertical plate, 72 inclined plate. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] The utility model provides Figure 1-8 The four-sided inverted demoulding structure of a rubber-iron integrated injection mold shown in the figure comprises a front mold 1 and a rear mold 2 arranged below the front mold 1, a mold cavity for rubber-iron molding is formed between the parting surfaces of the front mold 1 and the rear mold 2, and the rear mold 2 is composed of a fixed plate 21, an ejector bottom plate 22, an ejector panel 23, a pad 24, and a B plate 25 from bottom to top, wherein the top of the middle of the B plate 25 is concave downwards for accommodating the mold core;

[0042] There are four inclined tops 3, which are respectively installed on the four sides of the mold core of the rear mold 2;

[0043] Slide blocks 4 are provided in four numbers and are respectively installed at the four corners of the mold core of the rear mold 2;

[0044] The four inclined tops 3 are connected end to end by sliders 4 to form a rectangular shape, wherein the outer sides of the inclined tops 3 located at the rear side and the left and right sides of the rear mold 2, the left and right ends of the inclined tops 3 located at the front side, and the outer sides of the four sliders 4 are all provided with protrusions 5 for forming the undercut of the rubber-iron product;

[0045] It also includes: a tilted top driving assembly 6, which is arranged at the bottom of each of the tilted tops 3 and is used to drive the tilted top 3 to slide toward the inside of the mold cavity to make way for the undercut of the rubber-iron product;

[0046] Each of the inclined ejector drive components 6 comprises: two bases 61, which are mounted on the ejector base plate 22, and the tops of the two bases extend above the top of the ejector panel 23; an inclined ejector rod 62, which is arranged on the top of each of the bases 61 and can slide along the width direction of the inclined ejector 3 above the base 61;

[0047] A slider driving assembly 7 is arranged at the bottom of each of the slides, and is used to drive the slider 4 to slide toward the inside of the mold cavity to make way for the undercut of the rubber-iron product;

[0048] Each of the slider driving assemblies 7 includes: a vertical plate 71 installed on the pad 24; an inclined plate 72 arranged inside the slider 4 and connected to the top of the vertical plate 71, and the inclined angle is such that the bottom end is inclined away from the center direction of the rear mold 2.

[0049] In one embodiment, the top end of each of the inclined ejector rods 62 passes through the pad 24 and the B plate 25 in sequence, extends to the interior of the mold core, and is connected to the bottom of the inclined ejector rod 3 located at the top end of the inclined ejector rod 62. Each of the inclined ejector rods 62 is arranged to be inclined, and the bottom end is inclined away from the center direction of the rear mold 2, so that when the B plate 25 moves downward, the inclined ejector rod 62 can be forced to move inward. The pad 24, the B plate 25, and the mold core are provided with a first inclined hole for the inclined ejector rod 62 to be inserted, and the diameter of the first inclined hole at the pad 24 is lengthened, so that when the pad 24 moves downward, there is enough margin between the pad 24 and the inclined ejector rod 62, that is, the pad 24 will not contact the inclined ejector rod 62 when moving downward, and will not apply a downward pressure to the inclined ejector rod 62, thereby ensuring that when the pad 24 moves downward, the inclined ejector rod 62 can maintain its original position and not move.

[0050] In one embodiment, each of the sliders 4 is penetrated by a second inclined hole for the inclined plate 72 to be inserted, so that when the pad 24 drives the vertical plate 71 downward, the slider 4 can be forced to move inward under the pressure of the inclined plate 72 .

[0051] The specific implementation mode is as follows: when the utility model is used, the steel plate used for forming is directly placed in the mold cavity, that is, the top of the mold core, and because only three of the four sides of the glue iron product formed by the steel plate have glue positions, therefore, except for the two ends of the outer side of the inclined top 3 located on the front side of the rear mold 2, the rest of the positions do not need to be provided with protrusions 5. Specifically, at the beginning of the injection molding process, the injection port of the external injection molding machine reaches the inside of the nozzle at the top of the front mold 1, and then the molten glue is injected. After the molten glue flows into the mold cavity and cools and solidifies, the glue iron product can be formed;

[0052] At this time, with the interface between the pad 24 and the B plate 25 as the dividing interface, the pad 24 starts to move downward under the drive of the external tooling, thereby driving each vertical plate 71 to move downward, and further causing each inclined plate 72 to move downward. At this time, the inner wall of the second inclined hole of the slider 4 will be subjected to the downward pressure of the inclined plate 72 and forced to move toward the mold core, that is, the four sliders 4 move inward at the same time, and the movement amount is 9-10mm, so that the protrusion 5 on the outer side of the slider 4 is away from the undercut on the rubber iron product;

[0053] Subsequently, with the interface between the B plate 25 and the front mold 1, i.e., the parting surface between the front mold 1 and the rear mold 2, the B plate 25 starts to move downward under the drive of the external tooling. At this time, each inclined ejector rod 62 is subjected to the downward pressure of the B plate 25 and is forced to move along the base 61 toward the mold core, i.e., multiple inclined ejector rods 62 move inward at the same time, and the movement amount is 2-3 mm. Driven by the inclined ejector rods 62, the four inclined ejectors 3 move inward synchronously, so that the protrusion 5 on the outer side of the inclined ejector rod 3 is away from the undercut on the rubber-iron product.

[0054] When the four slide blocks 4 and the four inclined ejectors 3 are all moved inward, the rubber iron product is ejected by the ejector block on the mold core and can be taken away by the staff;

[0055] This embodiment specifically solves the problem that in the prior art, in order to make the molded rubber-iron product have an undercut to fix the counterpart during assembly, a protrusion 5 is generally provided on the outside of the inclined top 3 and the slider 4 in the mold cavity to form an undercut. However, after the rubber-iron product is formed, the undercut will hook the inclined top 3 and the slider 4, affecting the ejection of the rubber-iron product, which requires improvement.

[0056] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A four-sided undercut demoulding structure of a rubber-iron integrated injection mold. Features: include: A front mold (1), and a rear mold (2) arranged below the front mold (1), wherein a mold cavity for forming the glue iron is formed between the parting surfaces of the front mold (1) and the rear mold (2); There are four inclined tops (3) respectively installed on four sides of the mold core of the rear mold (2); There are four sliders (4), which are respectively installed at the four corners of the mold core of the rear mold (2); The four inclined tops (3) are connected end to end through a slider (4) to form a rectangular shape, wherein the outer sides of the inclined tops (3) located at the rear side and left and right sides of the rear mold (2), the left and right ends of the inclined tops (3) located at the front side, and the outer sides of the four sliders (4) are all provided with protrusions (5) for forming the undercut of the rubber-iron product; Also includes: A tilting top driving assembly (6) is arranged at the bottom of each tilting top (3) and is used to drive the tilting top (3) to slide toward the inside of the mold cavity to make way for the rubber-iron product to be buckled; The slider driving assembly (7) is arranged at the bottom of each slide and is used to drive the slider (4) to slide towards the inside of the mold cavity to make way for the rubber-iron product to be buckled.

2. The four-sided undercut demoulding structure of the rubber-iron integrated injection mold according to claim 1, Features: The rear mold (2) is composed of a fixing plate (21), an ejector bottom plate (22), an ejector face plate (23), a pad plate (24), and a B plate (25) in order from bottom to top, wherein the top of the middle of the B plate (25) is concave downwards to accommodate the mold core.

3. The four-sided undercut demoulding structure of the rubber-iron integrated injection mold according to claim 2, Features: Each of the inclined roof drive assemblies (6) comprises: Two bases (61) are mounted on the ejector base plate (22), and the tops of the two bases extend above the top of the ejector panel (23); An inclined top rod (62) is arranged on the top of each base (61) and can slide along the width direction of the inclined top (3) above the base (61); The top end of each inclined ejector rod (62) sequentially passes through the backing plate (24) and the B plate (25) to extend into the mold core, and is connected to the bottom of the inclined ejector rod (3) located at the top end of the inclined ejector rod (62).

4. The four-sided undercut demoulding structure of the rubber-iron integrated injection mold according to claim 3, Features: Each of the inclined ejector rods (62) is arranged to be inclined, and the bottom end is inclined away from the center direction of the rear mold (2); The pad (24), the B plate (25), and the mold core are all provided with a first inclined hole at each inclined ejector rod (62) for the inclined ejector rod (62) to be inserted, and the diameter of the first inclined hole at the pad (24) is lengthened.

5. The four-sided undercut demoulding structure of the rubber-iron integrated injection mold according to claim 2, Features: Each of the slider drive assemblies (7) comprises: A vertical plate (71) is mounted on the backing plate (24); The inclined plate (72) is arranged inside the sliding block (4) and is connected to the top end of the vertical plate (71), and is inclined at an angle such that the bottom end is inclined away from the center direction of the rear mold (2).

6. The four-sided undercut demoulding structure of the rubber-iron integrated injection mold according to claim 5, Features: Each of the sliding blocks (4) is penetrated by a second inclined hole into which the inclined plate (72) can be inserted.

Images