Injection type runner-free forming mold

Abstract

The utility model provides an injection type runner-free forming mold which comprises a top seat and an inner caulking groove, the left side and the right side of the top seat are each provided with two sets of outer caulking grooves used for being connected with external equipment in an embedded mode for limiting and fixing, and a set of injection molding openings used for injection and plastic guiding are formed in the middle of the top seat. Compared with the prior art, the injection molding device has the following beneficial effects that a plurality of groups of injection molding plates are driven by using the pressing seat to correspondingly join the interiors of the molding grooves, and a plurality of molds are molded by using the molding grooves, so that the molding efficiency is improved, and the production cost is reduced. A forming mold in a forming groove is demolded and ejected by using a mold ejecting block, the interior of a positioning groove is sealed by using a sealing ring, and an injection molding material is guided into a forming cavity by using a flow plastic cavity in an injection molding block.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to an injection-type runner-free molding mold. Background Art

[0002] A runnerless injection mold is a special type of injection mold. This mold does not have a runner during the molding process. Instead, the extended nozzle of the injection molding machine directly injects the molten material into each mold cavity for molding. If a runnerless injection mold is difficult to eject during use, it may cause a series of problems. The following is a detailed explanation of these problems:

[0003] During the injection molding process, the product needs to cool and solidify in the mold before it can be ejected. If ejection is difficult, the product's residence time in the mold will increase, which will affect production efficiency.

[0004] If the mold ejection is not smooth, the product may be subjected to excessive pressure, resulting in deformation or surface damage. In addition, if the product stays in the mold for too long, it may generate internal stress due to uneven shrinkage, causing the product to crack during use. Therefore, there is an urgent need for an injection mold without runners to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an injection-type runner-less molding die to solve the problems raised in the above-mentioned background technology.

[0006] The utility model is realized by the following technical solutions: an injection-type runnerless molding die, comprising: a top seat and an inner embedding groove, wherein two sets of outer embedding grooves for engaging with external equipment and limiting fixation are provided on the left and right sides of the top seat;

[0007] A group of injection ports for injection molding are provided in the middle of the top seat, and a pressure seat is provided at the lower end of the top seat for keeping the injection block and the molding groove engaged and positioned with each other;

[0008] Four groups of positioning columns are provided inside the four groups of positive corners of the pressure seat for keeping the injection block and the inside of the molding groove engaged with each other. A group of injection molding plates for supporting the pressure seat is provided at the lower end of the pressure seat. The pressure seat can be used to drive several groups of injection molding plates to engage with the inside of the molding groove accordingly.

[0009] As a preferred embodiment, each group of positioning columns has a group of positioning grooves at the lower end for limiting the positioning columns, and the injection molding plate has several groups of molding grooves inside for molding multiple molds, so that multiple molds can be molded by using the molding grooves.

[0010] As a preferred embodiment, a group of injection blocks for introducing injection molding materials are provided at the upper end of each group of molding grooves, and a group of top modules for demolding the injection mold inside the molding groove are provided at the inner bottom of each group of molding grooves. The molding mold inside the molding groove can be demolded and ejected by using the top modules.

[0011] As a preferred embodiment, the lower end of the top module is provided with a group of electric cylinders for controlling the up and down movement of the top module, the lower ends of several groups of electric cylinders are provided with a group of connecting plates for supporting several groups of electric cylinders, and the lower end of the injection molding plate is provided with a base for supporting the injection molding plate.

[0012] As a preferred embodiment, the top seat and the pressure seat are fixed by bolts, and the interior of the pressure seat is connected and fixed with four groups of positioning columns. The cross-section of each group of positioning columns is a circular structure, and a group of sealing rings for movably sealingly connecting with the inner wall of the positioning groove are provided on the outside of the positioning columns. The interior of the positioning groove can be sealed by using the sealing rings.

[0013] As a preferred embodiment, the pressure seat is provided with a sub-molding cavity inside, the sub-molding cavity is interconnected with the inside of the injection port and the inside of several groups of injection blocks, the inside of the injection block is a hollow structure, and the inside of the injection block is provided with a group of flow molding cavities, which can be used to introduce the injection material into the molding cavity by using the flow molding cavity inside the injection block.

[0014] As a preferred embodiment, each group of injection blocks is sealed and connected to the inside of a group of molding cavities, and the outer side of the top module is movably sealed and embedded with the inner wall of the molding cavity. When the top module is at the lowest position, the top module is located 20 mm from the bottom of the inner side of the molding cavity.

[0015] After adopting the above technical solution, the beneficial effects of the utility model are: by using a pressure seat to drive several groups of injection molding plates to engage with the inside of the molding groove, by using the molding groove to mold multiple molds, by using a top module to demold and eject the molding mold inside the molding groove, by using a sealing ring to seal the inside of the positioning groove, and by using the flow molding cavity inside the injection block to introduce the injection molding material into the molding cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1This is a schematic diagram of the structure of an injection-type runner-free molding die of the utility model, viewed from the left oblique side;

[0018] Figure 2 This is a schematic diagram of the structure of the electric cylinder and the top module in an injection-type runnerless molding die of the utility model, viewed from the right oblique front side;

[0019] Figure 3 This is a left front oblique top view of a plurality of molding grooves in an injection-type runner-less molding die of the utility model;

[0020] Figure 4 This is a left-side top view of a plurality of molding grooves in an injection-type runner-free molding die of the utility model;

[0021] In the figure: 100-top seat, 110-external embedded groove, 120-injection port, 130-pressing seat, 140-positioning column, 150-sealing ring, 160-positioning groove, 170-injection block, 180-injection plate, 190-base, 200-electric cylinder, 210-connecting plate, 220-top module, 230-molding groove, 240-embedded groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 4 , an injection-type runnerless molding mold, comprising: a top base 100, a top module 220, a molding groove 230 and an inner embedding groove 240, and two sets of outer embedding grooves 110 for engaging with external equipment and fixing the same on both sides of the top base 100;

[0024] A set of injection ports 120 for injection molding is provided in the middle of the top seat 100, and a pressure seat 130 is provided at the lower end of the top seat 100 for keeping the injection block 170 and the molding groove 230 engaged with each other.

[0025] Four groups of positioning columns 140 are provided inside the four groups of positive corners of the pressure seat 130 for keeping the injection block 170 and the inside of the molding groove 230 engaged with each other. A group of injection molding plates 180 for supporting the pressure seat 130 is provided at the lower end of the pressure seat 130. By using the pressure seat 130, several groups of injection molding plates 180 can be driven to engage with the inside of the molding groove 230 accordingly.

[0026] A group of positioning grooves 160 for limiting and engaging the positioning columns 140 are provided at the lower end of each group of positioning columns 140 . Several groups of molding grooves 230 for molding multiple molds are provided inside the injection molding plate 180 . Multiple molds can be molded by using the molding grooves 230 .

[0027] A group of injection blocks 170 for introducing injection materials are provided at the upper end of each group of molding grooves 230, and a group of top modules 220 for demolding the injection mold inside the molding groove 230 are provided at the inner bottom of each group of molding grooves 230. The molding mold inside the molding groove 230 can be demolded and ejected by using the top modules 220.

[0028] A group of electric cylinders 200 for controlling the up and down movement of the top module 220 are provided at the lower end of the top module 220, a group of connecting plates 210 for supporting the groups of electric cylinders 200 are provided at the lower end of the several groups of electric cylinders 200, and a base 190 for supporting the injection molding plate 180 is provided at the lower end of the injection molding plate 180.

[0029] The top seat 100 and the pressure seat 130 are fixed by bolts, and the interior of the pressure seat 130 is connected and fixed with four groups of positioning columns 140. The cross-section of each group of positioning columns 140 is a circular structure. A group of sealing rings 150 for movably sealingly connecting with the inner wall of the positioning groove 160 is provided on the outside of the positioning column 140. The interior of the positioning groove 160 can be sealed by using the sealing ring 150.

[0030] The pressure seat 130 is provided with a sub-molding cavity inside, and the interior of the sub-molding cavity is interconnected with the interior of the injection port 120 and the interior of several groups of injection blocks 170. The interior of the injection block 170 is a hollow structure, and the interior of the injection block 170 is provided with a group of flow molding cavities, which can be used to introduce the injection material into the molding cavity by using the flow molding cavity inside the injection block 170.

[0031] Each group of injection blocks 170 is sealed and connected to the inside of a group of molding cavities, and the outer side of the top module 220 is movably sealed and embedded with the inner wall of the molding cavity. When the top module 220 is at the lowest position, the top module 220 is located 20 mm from the bottom inside the molding cavity.

[0032] See also Figure 1-Figure 4As the first embodiment of the present invention: In order to solve the problem that during the injection molding process, the product needs to be cooled and solidified in the mold before it can be ejected, if ejection is difficult, the residence time of the product in the mold will increase, which will affect the production efficiency, first, the staff seals the injection port 120 through the external injection molding equipment, and the pressure seat 130 is provided with a cavity for dividing the mold, the interior of the cavity is interconnected with the interior of the injection port 120 and the interior of several groups of injection blocks 170, and the interior of the injection block 170 is a hollow structure. A group of flow molding cavities are provided in the part, and the injection molding material directly enters the sub-molding cavity and several groups of flow molding cavities through the injection port 120, and several groups of flow molding cavities directly enter the molding groove 230, so that the injection molding material is molded in the molding groove 230. At the same time, since the outer side of the top module 220 is movably sealed and embedded with the inner wall of the molding cavity, when the top module 220 is at the lowest position, the top module 220 is located 20 mm from the bottom inside the molding cavity. When the staff needs to eject the mold, they only need to start the top module 220 inside the corresponding molding groove 230 to eject the mold.

[0033] See also Figure 1-Figure 4 , as the second embodiment of the present utility model: based on the description in the above embodiment, further, when the staff is determining the fitting position of the injection block 170 and the molding groove 230, since the four groups of positive corners of the pressure seat 130 are provided with four groups of positioning posts 140 for keeping the injection block 170 and the molding groove 230 fitted together and positioned with each other, the lower end of each group of positioning posts 140 is provided with a group of positioning grooves 160 for limiting the fitting of the positioning posts 140, after the positioning posts 140 and the positioning grooves 160 are fitted with each other, the corresponding positions of the injection block 170 and the molding groove 230 can be determined, thereby enabling the staff to quickly determine the positions of the injection block 170 and the molding groove 230.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An injection-type runnerless molding mold, comprising: A top seat (100), an injection port (120), a molding groove (230) and an embedded groove (240), characterized in that two sets of external embedded grooves (110) for engaging with external equipment for limited fixing are provided on both the left and right sides of the top seat (100); A group of injection ports (120) for injection molding are provided in the middle of the top seat (100), and a pressure seat (130) is provided at the lower end of the top seat (100) for holding the injection block (170) and the molding groove (230) in engagement and positioning. Four groups of positioning columns (140) are provided inside the four groups of positive corners of the press seat (130) for maintaining the mutual engagement and positioning of the injection block (170) and the molding groove (230), and a group of injection plates (180) for supporting the press seat (130) are provided at the lower end of the press seat (130); A group of positioning grooves (160) for limiting and engaging the positioning columns (140) are provided at the lower end of each group of positioning columns (140), and a plurality of groups of molding grooves (230) for molding multiple molds are provided inside the injection molding plate (180); A group of injection blocks (170) for introducing injection molding materials are provided at the upper end of each group of molding grooves (230), and a group of top modules (220) for demoulding the injection mold inside the molding grooves (230) are provided at the inner bottom of each group of molding grooves (230); A group of electric cylinders (200) for controlling the upward and downward movement of the top module (220) are provided at the lower end of the top module (220); a group of connecting plates (210) for supporting the groups of electric cylinders (200) are provided at the lower end of the plurality of groups of electric cylinders (200); and a base (190) for supporting the injection molding plate (180) is provided at the lower end of the injection molding plate (180).

2. The injection mold without runner according to claim 1, characterized in that: The top seat (100) and the pressure seat (130) are connected and fixed by bolts. The interior of the pressure seat (130) is connected and fixed with four groups of positioning columns (140). The cross section of each group of positioning columns (140) is a circular structure. The outer side of the positioning columns (140) is provided with a group of sealing rings (150) for movably sealingly connecting with the inner wall of the positioning groove (160).

3. The injection mold without runner according to claim 2, characterized in that: The pressure seat (130) is provided with a cavity for plastic sub-molding inside. The interior of the plastic sub-molding cavity is interconnected with the interior of the injection port (120) and the interior of several groups of injection blocks (170). The interior of the injection block (170) is a hollow structure. The interior of the injection block (170) is provided with a group of flow molding cavities.

4. The injection mold without runner according to claim 3, characterized in that: Each group of injection blocks (170) is sealed and connected to the inside of a group of molding cavities, and the outside of the top module (220) is movably sealed and embedded with the inner wall of the molding cavity. When the top module (220) is at the lowest position, the top module (220) is located 20 mm from the bottom of the inner side of the molding cavity.

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