CN211105301U - Side sprue injection mold for in-mold cutting and separating - Google Patents

Abstract

The utility model discloses a side gate injection mold used for in-mold cutting and separation, relates to the technical field of injection molds, and aims to solve the problem that when demolding is ejected, a flow channel and a product are ejected together, and the secondary processing is performed manually to make the injection mold. The problem of product and runner separation. The main point of the technical solution is that it includes a movable template, a first upper push plate, a second upper push plate, a first lower push plate, a second lower push plate and a bottom plate of the movable mold, which are arranged parallel to each other and in sequence. The block body is provided with an eccentric waist circle hole that penetrates the top surface and the bottom surface of the slider body, and the second upper push plate is provided with a slider guide pin. The end face of the straight section and the vertical section away from the inclined surface guide section abuts against the top face of the upper push plate 1. When the mold is ejected after the mold is opened, the slider body is driven to the outside by the slider guide pin, thereby cutting off the gate and achieving the purpose of automatic separation of the gate and the product of the side gate injection mold.

Description

A side gate injection mold for in-mold cutting and separation

technical field

The utility model relates to the technical field of injection moulds, in particular to a side gate injection mould for in-mold cutting and separation.

Background technique

The gating system of the injection mold usually includes a main runner, a branch runner and a plurality of gates. The gate is connected to the cavity of the injection mold. The molten material enters the main runner from the injection molding machine nozzle and is distributed through the branch runner, and then passes through each gate. The ports enter into each cavity of the mold respectively. In the injection mold, a mold thimble is usually used, and the mold thimble moves up and down to eject the molded product in the mold.

Referring to FIG. 1, an existing gating system includes a runner 1 and a gate 11 connected to the runner 1. After the molten material enters the runner 1 from the nozzle of the injection molding machine, it enters the cavity of the mold through the gate 11 , and finally the product 12 is injection-molded.

The prior art scheme in the above has the following defects: when the product 12 of the above-mentioned conventional side gate injection mold is ejected from the mold, the runner 1 and the product 12 are ejected together, and then secondary processing is performed manually, so that the product 12 and the product 12 are ejected together. The flow channel 1 is separated, and the processing steps are relatively cumbersome. In addition, the secondary processing is performed manually, which may cause product defects due to manual operation problems, so it needs further improvement.

Utility model content

The purpose of the present utility model is to provide a side gate injection mold for in-mold cutting and separation, which has the effect of realizing the automatic separation of the in-mold flow channel and the product of the side gate injection mold.

The above-mentioned technical purpose of the present utility model is achieved through the following technical solutions:

A side gate injection mold for in-mold cutting and separation, comprising a movable template, a first upper push plate, a second upper push plate, a first lower push plate, a second lower push plate and a movable mold base plate, which are parallel to each other and arranged in sequence. The movable template is provided with a slider body, the slider body is provided with an eccentric waist round hole penetrating the top surface and the bottom surface of the slider body, the upper push plate is provided with a slider guide pin, and the slider body is provided with a slider guide pin. The block guide pin includes an inclined surface guide section inserted into the eccentric waist circular hole and a connected vertical section, and the end surface of the vertical section away from the inclined surface guide section abuts against the top surface of the second upper push plate.

The utility model is further set as follows: the eccentricity of the eccentric waist hole is 0.2mm.

The utility model is further provided that: the slider body is provided with a slider inlet, and the gate and part of the flow channel are arranged on the top surface of the slider inlet.

The utility model is further configured as follows: the upper push plate 2 is fixed with an ejector with an inverted T-shaped cross section, and the ejector includes an ejector rod inserted in the lower push plate 1 and the lower push plate 2 and an extension The top block of the second push-down plate is taken out, the outer diameter of the top block is larger than the outer diameter of the top rod, and the bottom plate of the movable mold is provided with a through hole for accommodating the top block.

The utility model is further provided that: the thickness of the top block is smaller than the thickness of the bottom plate of the movable mold, and the distance between the top surface of the top block and the bottom surface of the second push-down plate is 2-3 mm.

The utility model is further configured as follows: a push plate guide column is arranged in the movable template and the movable mold bottom plate, and the push plate guide column passes through the second lower push plate, the first lower push plate, the second upper push plate and the upper push plate in sequence. one.

To sum up, the beneficial technical effects of the present utility model are:

1. Through the setting of the slider guide pin and the eccentric waist hole, when the mold is ejected after the mold is opened, the slider body is driven to the outside by the slider guide pin, so as to cut off the gate and realize the pouring of the side gate injection mold. The mouth and the product are automatically separated without manual secondary processing;

2. Through the setting of the ejector, when the mold is opened and ejected, the ejector first drives the upper push plate 1 and the upper push plate 2 to move, and the upper push plate 1 and the upper push plate 2 drive the slider guide pin to move forward. , because there is a gap between the top surface of the top block and the bottom surface of the second push-down plate, the first and second push-down plates will not move, and the product and the flow channel will not be pushed out; at this time, the vertical section of the slider guide pin Entering the eccentric waist round hole, the slider body is driven by the slider guide pin to move 0.2mm to the outside. Since the gate width is only 0.1mm, the gate is cut by the slider entry, which realizes the separation of the gate and the product; The ejection action continues, the lower push plate 1 and the lower push plate 2 are also driven by the ejector to move forward, and the product and the runner are also pushed forward together, so that the product and the runner after the gate is separated are pushed together by the ejector pin. Eject the mold.

Description of drawings

Fig. 1 is the overall structure schematic diagram of gating system in the background technology;

Fig. 2 is the enlarged schematic diagram of part A in Fig. 1;

Fig. 3 is the cross-sectional structure schematic diagram one of the embodiment of the present invention;

Fig. 4 is the enlarged schematic diagram of part B in Fig. 3;

5 is a second schematic diagram of the cross-sectional structure of the embodiment of the present invention;

FIG. 6 is an enlarged schematic view of part C in FIG. 5 .

In the figure, 1, runner; 11, gate; 12, product; 2, movable template; 21, upper push plate 1; 22, upper push plate 2; 3, movable mold base plate; 31, lower push plate 1; 32 , Lower push plate 2; 4. Slider body; 41. Eccentric waist hole; 42. Slider into the sub; 5. Slider guide pin; ; 61, ejector rod; 62, ejector block; 7, through hole; 8, push plate guide post.

Detailed ways

The preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, so that the protection scope of the present utility model can be more clearly defined. .

Referring to FIGS. 3 and 5 , a side gate injection mold for in-mold cutting and separation disclosed by the utility model includes a movable platen 2 , an upper push plate 21 and an upper push plate 2 22 which are parallel to each other and arranged in sequence. , lower push plate 1 31, lower push plate 2 32 and movable mold bottom plate 3, push plate guide column 8 is provided in movable template 2 and movable mold bottom plate 3, and push plate guide column 8 passes through lower push plate two 32, lower push plate guide column 8 in turn One push plate 31 , two upper push plates 22 and one upper push plate 21 . The upper and lower layers of the push plates are guided by the shared push plate guide posts 8 and guide sleeves. The first lower push plate 31 and the second lower push plate 32 are fixed with a product ejector pin and a flow channel ejector pin. After the molten material enters the runner 1 from the nozzle of the injection molding machine, it enters the cavity of the mold through the gate 11, and finally the product 12 is injection-molded. In this embodiment, the gate 11 has a width of 0.1 mm.

Referring to FIGS. 5 and 6 , a slider body 4 is arranged in the movable template 2 , a slider body 4 is screwed with a slider inlet, and the gate 11 and part of the runner 1 are arranged on the top surface of the slider inlet 42 . The slider body 4 is provided with an eccentric waist hole 41 penetrating the top surface and the bottom surface of the slider body 4 . In this embodiment, the eccentricity of the eccentric waist hole 41 is 0.2 mm. The upper push plate 1 21 is provided with a slider guide pin 5 , and the slider guide pin 5 includes an inclined surface guide section 51 and a vertical section 52 inserted into the eccentric waist circular hole 41 . The inclined surface guide section 51 and the vertical section 52 are integrally formed, and the end surface of the vertical section 52 away from the inclined surface guide section 51 abuts against the top surface of the second upper push plate 22 . Before the mold is opened and ejected, only the inclined surface guide section 51 of the head of the slider guide pin 5 is in the eccentric waist circular hole 41 of the slider body 4 and will not drive the slider body 4 to move. When the mold is ejected after the mold is opened, the slider guide pin 5 moves forward, the vertical section 52 of the slider guide pin 5 enters the eccentric waist round hole 41 on the slider body 4, and the slider body 4 is guided by the slider. The pin 5 is driven to move outward by 0.2mm. Since the gate 11 has a width of only 0.1mm, the gate 11 is cut by the slider insert 42 and the gate 11 and the product 12 are separated.

Referring to FIGS. 3 and 4 , the bottom surface of the second upper push plate 22 is screwed with an ejector 6 with an inverted T-shaped cross-section. The top rod 61 and the top block 62 extending out of the second lower push plate 32 are integrally formed with the top rod 61 and the top block 62 . The outer diameter of the top block 62 is larger than the outer diameter of the top rod 61 . The movable mold bottom plate 3 is provided with a through hole 7 for accommodating the top block 62 , and the through hole 7 penetrates the top and bottom surfaces of the movable mold bottom plate 3 . The thickness of the top block 62 is smaller than the thickness of the movable mold bottom plate 3 , and there is a 2-3 mm gap (ie delay) between the top surface of the top block 62 and the bottom surface of the second push-down plate 32 . When the mold is ejected after the mold is opened, due to the existence of the ejector 6, the ejector 6 first drives the upper push plate 21 and the upper push plate 22 to move, and the upper push plate 1 21 and the upper push plate 22 drive the sliding The block guide pin 5 moves forward. Due to the delay setting of the ejector 6, before the delay stroke arrives, the lower push plate 31 and the lower push plate 2 32 will not move, that is to say, the product and the runner ejector will not move. Action, product and runner will not be ejected. As the slider guide pin 5 moves forward, the vertical section 52 of the slider guide pin 5 enters the eccentric waist circular hole 41 on the slider body 4, and the slider body 4 is driven by the slider guide pin 5 to move outward by 0.2 mm, since the gate 11 has a width of only 0.1 mm, the gate 11 is cut by the slider insert 42, and the gate 11 and the product 12 are separated. Then, due to the continuous ejection action, after the bottom surface of the top block 62 moves to the bottom surface of the second push plate 32 (ie, exceeds the set delay amount), the bottom push plate 31 and the second push plate 32 are also pushed by the top block. 62 is driven to move forward, and the ejector pins of the product and the runner are also pushed forward together, so that the product 12 and the runner 1 after the gate is separated are ejected from the mold together by the ejector pins.

The implementation principle of this embodiment is: when the mold is ejected after the mold is opened, due to the existence of the ejector 6, the ejector 6 first drives the upper push plate 1 21 and the upper push plate 22 to move, and the upper push plate 1 21 moves. , The second upper push plate 22 drives the slider guide pin 5 to move forward. Due to the delay setting of the ejector 6, the lower push plate 1 31 and the lower push plate 2 32 will not move before the delay amount stroke arrives, that is, It is said that the ejector pin of the product and the runner will not move, and the product and the runner will not be ejected. As the slider guide pin 5 moves forward, the vertical section 52 of the slider guide pin 5 enters the eccentric waist circular hole 41 on the slider body 4, and the slider body 4 is driven by the slider guide pin 5 to move outward by 0.2 mm, since the gate 11 has a width of only 0.1 mm, the gate 11 is cut by the slider insert 42, and the gate 11 and the product 12 are separated.

Then, due to the continuous ejection action, after the bottom surface of the top block 62 moves to the bottom surface of the second push plate 32 (ie, exceeds the set delay amount), the bottom push plate 31 and the second push plate 32 are also pushed by the top block. 62 is driven to move forward, and the ejector pins of the product and the runner are also ejected forward together, so that the product 12 and the runner 1 after gate separation are ejected from the mold together by the ejector pins, and no manual secondary processing is required. The mold movement is simple and the gate cutting action is highly reliable. It does not affect the multiple ejection of the product thimble, the function is stable, and the product defect rate is low.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other Relevant technical fields are similarly included in the scope of patent protection of the present invention.

Claims (6)

1. A side gate injection mold for in-mold cutting and separation, characterized in that it comprises a movable template (2), an upper push plate (21), an upper push plate two (22), which are parallel to each other and arranged in sequence. A lower push plate (31), a second lower push plate (32), and a bottom plate (3) of a movable mold, wherein a slider body (4) is provided in the movable mold plate (2), and a slider body (4) is provided on the slider body (4). There are eccentric waist round holes (41) penetrating the top surface and bottom surface of the slider body (4). ) comprises an inclined surface guide section (51) inserted into the eccentric waist circular hole (41) and a connected vertical section (52), the vertical section (52) being away from the end face of the inclined surface guide section (51) and the upper push plate two ( 22) on the top surface. 2 . The side gate injection mold for in-mold cutting and separation according to claim 1 , wherein the eccentricity of the eccentric waist hole ( 41 ) is 0.2 mm. 3 . 3. A side gate injection mold for in-mold cutting and separation according to claim 2, characterized in that: the slider body (4) is provided with a slider insert (42), the casting The port (11) and part of the flow channel (1) are arranged on the top surface of the slider inlet (42). 4. A side gate injection mold for in-mold cutting and separation according to claim 1, characterized in that: the bottom surface of the second upper push plate (22) is fixed with an ejector with an inverted T-shaped cross-section. Piece (6), the ejection piece (6) includes an ejector rod (61) inserted in the lower push plate 1 (31) and the lower push plate 2 (32) and a rod extending out of the lower push plate 2 (32). A top block (62), the outer diameter of the top block (62) is larger than the outer diameter of the top rod (61), and a through hole (7) for accommodating the top block (62) is opened on the movable mold bottom plate (3). 5. A side gate injection mold for in-mold cutting and separation according to claim 4, characterized in that: the thickness of the top block (62) is less than the thickness of the movable mold bottom plate (3), and the top The distance between the top surface of the block (62) and the bottom surface of the second lower push plate (32) is 2-3mm. 6. A side gate injection mold for in-mold cutting and separation according to claim 1, characterized in that: a push plate guide post ( 8), the push plate guide column (8) passes through the lower push plate two (32), the lower push plate one (31), the upper push plate two (22) and the upper push plate one (21) in sequence.

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