CN216465988U

CN216465988U - Traceless demolding mold for transparent product

Info

Publication number: CN216465988U
Application number: CN202122800544.4U
Authority: CN
Inventors: 张传友
Original assignee: Dalian Nissin Precision Plastic Molding Co ltd
Current assignee: Dalian Nissin Precision Plastic Molding Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-05-10
Anticipated expiration: 2031-11-16

Abstract

The utility model discloses a traceless demoulding mould for transparent products, which comprises a fixed mould part and a movable mould part, wherein a fixed mould core is arranged in the fixed mould part, a movable mould core is arranged in the movable mould part, and the fixed mould core and the movable mould core can jointly enclose to form a cavity when the mould is closed, and the traceless demoulding mould is characterized in that: the die comprises a fixed die core and a fixed die, and is characterized in that a first fixed die insert and a second fixed die insert are movably connected in the fixed die core, springs are arranged at the top ends of the first fixed die insert and the second fixed die insert, a material channel communicated with a die cavity is arranged in the first fixed die insert, a sliding block is further connected in the movable die part in a sliding manner, an inclined guide hole is formed in the sliding block, a locking block is connected to the bottom of the fixed die part, an inclined guide pillar matched with the inclined guide hole is connected to the locking block, a delay gap is further arranged between the inclined guide hole and the inclined guide pillar, a sliding block delay insert pin is movably connected in one end of the sliding block facing the die cavity, and a spring is arranged at one end, far away from the die cavity, of the sliding block delay insert pin.

Description

Traceless demolding mold for transparent product

Technical Field

The utility model relates to the field of injection molds, in particular to a traceless demolding mold for transparent products.

Background

When the injection mold is used for producing transparent plastic products, because the products are transparent, the marks ejected by the ejector rods during demolding are easily left on the surfaces of the products, the appearance of the transparent plastic products can be influenced, and the transparent plastic products have obvious concave-convex feeling when being touched. Under the condition of higher appearance requirement, the impression is not allowed, thus seriously restricting the market competitiveness of related enterprises.

Meanwhile, for a product with higher requirement on the appearance surface, the appearance surface is smooth, so that the product is very easy to adhere to the fixed mold core part during demolding, the product is easy to displace in the moment of mold opening, and when an inverted buckle structure exists in the product, once the product is displaced before the inverted buckle pulling action is completed, the product is very easy to damage, and the probability of defective products is greatly increased.

There is therefore a need for a method or apparatus that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art, and provides the die which is simple in structure, ingenious in design and reasonable in layout, and can not leave ejection traces on the surface of a transparent product on the premise of ensuring normal ejection action.

The technical solution of the utility model is as follows: the utility model provides a no trace drawing of patterns mould to transparent product, includes cover half subtotal movable mould part, be provided with cover half benevolence 1 in the cover half part, be provided with movable mould benevolence 2 in the movable mould part, cover half benevolence 1 and movable mould benevolence 2 can surround jointly when the compound die and form die cavity, its characterized in that: a first fixed die insert 3 and a second fixed die insert 4 are movably connected in the fixed die core 1, springs 5 are arranged at the top ends of the first fixed die insert 3 and the second fixed die insert 4, a material channel communicated with a die cavity is arranged in the first fixed die insert 3,

a slide block 6 is also connected in the movable mould part in a sliding way, an inclined guide hole 7 is arranged on the slide block 6, a locking block 8 is connected at the bottom of the fixed mould part, an inclined guide post 9 matched with the inclined guide hole 7 is connected on the locking block 8, a delay gap 10 is also arranged between the inclined guide hole 7 and the inclined guide post 9, a slide block delay insert pin 11 is movably connected inside one end of the slide block 6 facing the cavity, a spring 5 is arranged at one end of the slide block delay insert pin 11 far away from the cavity,

the longitudinal end face of the cavity is in a T shape and consists of a horizontal part and a vertical part which are communicated with each other, the first fixed die insert 3 and the second fixed die insert 4 are matched with the horizontal part, the slide block delay insert pin 11 is matched with the vertical part, the bottom edge of the slide block 6 is provided with a grid baffle part 12, the grid baffle part 12 is positioned below the vertical part when the die is closed, and the thickness of the grid baffle part 12 is n,

the moving die is characterized in that a top rod plate 13 is further arranged in the moving die part, a first top rod 14 and a second top rod 15 are arranged on the top rod plate 13, the top end of the first top rod 14 is matched with a material channel part in the first fixed die insert 3, the second top rod 15 is matched with the blocking part 12, a limiting part 16 is arranged at the bottom end of the first top rod 14, the limiting part 16 is located in a delay groove 17 formed in the top rod plate 13, and the distance between the bottom end 16 of the limiting part and the surface of the delay groove 17 is n in a die assembly state.

Compared with the prior art, the utility model has the following advantages:

this kind of structural style's no trace drawing of patterns mould to transparent product, its simple structure, design benefit, rationally distributed, it is when producing the transparent product that requires higher to the outward appearance to traditional injection mold, leaves the problem of ejecting vestige easily at the outward appearance face of product, designs a special structure. The ejector rod for demoulding is arranged at the position corresponding to the sprue channel, the ejector rod can not contact with the appearance surface of a product during demoulding, the product is ejected out of a cavity through the residual material shank part, the other ejector rod is ejected at the edge of the product, and the ejector rod corresponding to the edge of the product does not participate in forming, so that no trace is left on the surface of the product. Meanwhile, the insert and the insert pin structure controlled by the spring are matched to ensure that the product does not displace along with the action of the fixed die side at the moment of die opening, so that the quality of the product is ensured. And the manufacturing process of the die is simple, the manufacturing cost is low, so that the die has multiple advantages, is particularly suitable for popularization and application in the field, and has a very wide market prospect.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a perspective view of a positional relationship between a product and a carrier rod to which an embodiment of the present invention is directed.

Detailed Description

The following description will explain embodiments of the present invention with reference to the accompanying drawings. As shown in fig. 1 and 2: a traceless demoulding mould for transparent products comprises a fixed mould part and a movable mould part, wherein a fixed mould core 1 is arranged in the fixed mould part, a movable mould core 2 is arranged in the movable mould part, the fixed mould core 1 and the movable mould core 2 can jointly surround to form a cavity when the mould is closed, a first fixed mould insert 3 and a second fixed mould insert 4 are movably connected in the fixed mould core 1, springs 5 are arranged at the top ends of the first fixed mould insert 3 and the second fixed mould insert 4, a material channel communicated with the cavity is arranged in the first fixed mould insert 3,

The working process of the traceless demoulding mould for the transparent product in the embodiment of the utility model is as follows: when the die is closed, the fixed die core 1 and the movable die core 2 are enclosed together to form a die cavity, a forming machine injects molten materials into the die cavity through a material channel arranged in the first fixed die insert 3, the die cavity is filled with the materials, the materials are cooled to form a product, and the longitudinal end surface of the product is T-shaped; in the mold closing state, all the springs 5 are in a compressed state;

after a product is molded, the fixed die part is separated from the movable die part under the driving of the molding machine, the fixed die core 1 is separated from the movable die core 2 at the moment of die opening, but the first fixed die insert 3 and the second fixed die insert 4 are still pressed on the product, in particular to the horizontal part of the product under the action of the spring 5, so that the product is prevented from being adhered with the fixed die core to generate displacement; in the process, because the delay gap 10 is reserved between the inclined guide hole 7 and the inclined guide post 9, the movement of the inclined guide post 9 in the initial stage is only used for making up the delay gap 10, but the slide block 6 is not driven to move, namely, the slide block 6 can also limit the product in the process, so that the product is ensured not to move in the initial stage of die opening, and the product can be ensured to be smoothly separated from the fixed die core 1;

when the mold opening distance reaches the degree that the inclined guide post 9 can be contacted with the inner wall of the inclined guide hole 7, the longitudinal motion of the inclined guide post 9 can be converted into the horizontal motion of the slide block 6, the slide block 6 moves towards the direction away from the cavity, and similarly, in the initial stage of the motion of the slide block 6, the slide block delay insert pin 11 still can be pressed against the vertical part of the product under the action of the spring 5, so that the vertical part can be smoothly separated from the slide block 6; meanwhile, the block part 12 at the bottom edge of the slide block 6 also leaves the lower part of the vertical part;

after the working procedure is finished, the ejector rod plate 13 acts to drive the first ejector rod 14 and the second ejector rod 15 to move upwards together, and because a distance of n exists between the top end of the second ejector rod 15 and the bottom edge of the vertical part of the product at the moment, and a distance between the limiting part 16 at the bottom end of the first ejector rod 14 and the bottom end surface of the delay slot 17 is also n, the two ejector rods can simultaneously contact with the bottom edges of the material channel part and the vertical part after passing through the distance of n in the process of moving upwards, so that the two ejector rods can simultaneously and synchronously eject the product;

and after the product is completely demoulded, cutting the material handle part from the product.

Claims

1. The utility model provides a no trace drawing of patterns mould to transparent product, includes cover half subtotal movable mould part, be provided with cover half benevolence (1) in the cover half part, be provided with movable mould benevolence (2) in the movable mould part, cover half benevolence (1) and movable mould benevolence (2) can surround jointly when the compound die and form die cavity, its characterized in that: a first fixed die insert (3) and a second fixed die insert (4) are movably connected in the fixed die core (1), springs (5) are arranged at the top ends of the first fixed die insert (3) and the second fixed die insert (4), a material channel communicated with a die cavity is arranged in the first fixed die insert (3),

the movable mold part is also connected with a sliding block (6) in a sliding manner, an inclined guide hole (7) is formed in the sliding block (6), the bottom of the fixed mold part is connected with a locking block (8), the locking block (8) is connected with an inclined guide post (9) matched with the inclined guide hole (7), a delay gap (10) is also arranged between the inclined guide hole (7) and the inclined guide post (9), a sliding block time-delay insert pin (11) is movably connected to the inner part of one end, facing the cavity, of the sliding block (6), a spring (5) is arranged at one end, away from the cavity, of the sliding block time-delay insert pin (11),

the longitudinal end face of the cavity is T-shaped and consists of a horizontal part and a vertical part which are communicated with each other, the first fixed die insert (3) and the second fixed die insert (4) are matched with the horizontal part, the slide block delay insert pin (11) is matched with the vertical part, the bottom edge of the slide block (6) is provided with a grid baffle part (12), the grid baffle part (12) is positioned below the vertical part when the die is closed, and the thickness of the grid baffle part (12) is n,

the die is characterized in that a ejector rod plate (13) is further arranged in the movable die part, a first ejector rod (14) and a second ejector rod (15) are arranged on the ejector rod plate (13), the top end of the first ejector rod (14) is matched with a material channel part in the first fixed die insert block (3), the second ejector rod (15) is matched with the blocking part (12), a limiting part (16) is arranged at the bottom end of the first ejector rod (14), the limiting part (16) is located in a time delay groove (17) formed in the ejector rod plate (13), and the distance between the limiting part (16) and the bottom end face of the time delay groove (17) is n in a die closing state.