CN216373097U - Weak mold insert protection architecture of injection mould - Google Patents

Abstract

The utility model discloses a weak insert protection structure of an injection mold, which comprises a fixed template, a movable template, an insert seat and two sets of tunnel slide block mechanisms, wherein the fixed template is fixed on the fixed template; the fixed template and the movable template are arranged oppositely, the insert seat is connected to the movable template in a sliding mode, a clamping groove used for connecting an insert is formed in the inner end of the insert seat, and the two sets of tunnel slider mechanisms are arranged in the fixed template and the movable template respectively and are arranged oppositely. Because the hydro-cylinder among the tunnel slider mechanism of this utility model can drive the guide block and remove to the die cavity, the guide block gos forward and drives tunnel slider and move to the die cavity direction for many thimbles of evenly distributed lean on the weak mold insert of installing on the mold insert seat from two relative directions from top to bottom, for it provides sufficient support, at the in-process of moulding plastics, melt the impact of material and not equidirectional pressure differential to the deformation influence of mold insert by the very big offset of support that the thimble provided, the deformation of the weak mold insert of effectual avoidance.

Description

Weak mold insert protection architecture of injection mould

Technical Field

The utility model relates to an injection mold, in particular to a weak insert protection structure of the injection mold.

Background

The mold insert is mainly used for being embedded in various irregular parts of an irregular mold and plays a role in fixing a space between a template and a filling template, the insert is widely applied to mold design and manufacture, the functions are various, for example, materials are saved, the processing is convenient, the exhaust is convenient, the precision is ensured, the exchange requirement is met, and the like, some inserts need to be made into a flat weak structure due to the characteristics of plastic products, such as a product 20 shown in an example in a figure 1A, a deeper hollow cavity is arranged on the side surface, a sliding block needs to be designed for core pulling after parting analysis is carried out, the insert 10 arranged on the sliding block has a longer size along a glue position but has a very thin thickness, in order to meet the heat dissipation requirement, materials such as beryllium copper with good heat conductivity and soft texture are often used, the strength is not optimistic, and in the injection molding process, the flowing of molten materials and the injection pressure can continuously impact the insert 10 as shown in a figure 1B, the mold insert that does not have support can't avoid takes place the swing buckling deformation, just need assess soon and be replaced, the processing cost of such weak mold insert is higher than ordinary mold insert a lot, it also spends extra man-hour to go up the lower mould to replace the mold insert, so in order to practice thrift injection moulding production cost and improve production efficiency, I decide to start the research and development of the weak mold insert protection design of injection mould, the target of research and development is the life who prolongs the weak mold insert, guarantee to mould plastics production's permanent stability, reduce production abnormal hidden danger, finally promote enterprise's production service level, also can realize the technological innovation of mould industry to a certain extent.

Disclosure of Invention

The utility model aims to provide a weak insert protection structure of an injection mould, which can avoid the deformation of a weak insert.

In order to achieve the purpose, the technical solution of the utility model is as follows:

the utility model relates to a weak insert protection structure of an injection mold, which comprises a fixed template, a movable template, an insert seat and two sets of tunnel slide block mechanisms, wherein the fixed template is fixed on the movable template; the fixed template and the movable template are arranged oppositely, the insert seat is connected to the movable template in a sliding mode and is positioned on the parting surface of the fixed template and the movable template, the inner end of the insert seat is provided with a clamping groove for connecting an insert, and the two sets of tunnel slide block mechanisms are respectively arranged in the fixed template and the movable template and are arranged oppositely; the tunnel sliding block mechanism comprises an oil cylinder, a connecting rod, a guide block, a tunnel sliding block and a plurality of thimbles; the end of a piston rod of the oil cylinder is connected with the outer end of the guide block through a connecting rod, the top surface or the bottom surface of the inner side of the guide block is embedded with the bottom surface or the top surface of the tunnel slide block in a sliding assembly mode, the bottom surface or the top surface of the tunnel slide block abuts against one end of the ejector pins, and the other ends of the ejector pins extend into the cavity and abut against the insert inserted into the cavity, so that the insert positioning effect is achieved.

The side top surface or the bottom surface of the guide block is an inclined surface, the bottom surface or the top surface of the tunnel sliding block is an inclined surface, and the inclined surface of the guide block is in sliding connection with the inclined surface of the tunnel sliding block in a groove block matching mode.

The inclined plane angle of the guide block is 6-10 degrees, and the inclined plane angle of the tunnel sliding block is 6-10 degrees.

The outer end of the guide block is provided with a longitudinally through T-shaped groove, the inner end of the connecting rod is provided with a disc head, the disc head is connected in the T-shaped groove of the guide block in a sliding mode, and the outer end of the connecting rod is connected with the rod end of a piston rod of the oil cylinder.

After the scheme of the adoption, because the hydro-cylinder among the tunnel slider mechanism of the utility model can drive the guide block and remove to the die cavity, the guide block gos forward and drives tunnel slider and moves to the die cavity direction, make many thimbles of evenly distributed support from two relative directions from top to bottom and lean on the weak mold insert of installing on the mold insert seat, support sufficient for it, at the in-process of moulding plastics, the impact of melting material and the not equidirectional pressure differential greatly offset by the support that the thimble provided to the deformation influence of mold insert, the effectual deformation of avoiding weak mold insert, be about to the stage that gets into the pressurize at the process of moulding plastics, the hydro-cylinder takes back the thimble and leaves the mold insert, stop motion when the thimble terminal surface glues the level and parallel and level with mould benevolence, the space that leaves continues to advance to glue and fills behind the saturation board and get into the pressurize, the product of moulding plastics is accomplished at last.

The utility model is further described with reference to the following figures and specific embodiments.

Drawings

FIG. 1A is a schematic view of an insert holder with an insert clamped thereto;

FIG. 1B is a schematic view of the impact of the molten material on the insert;

FIG. 2 is a cross-sectional view of the utility model at the start of injection molding;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a cross-sectional view of the utility model at the end of injection molding;

FIG. 5 is an enlarged view of a portion of FIG. 4 at B;

FIG. 6 is a schematic view at A of FIG. 3 during injection molding of the present invention;

FIG. 7 is an isometric view of the tunnel slide mechanism of the present invention;

FIG. 8 is an exploded perspective view of the tunnel slide mechanism of the present invention;

fig. 9 is a schematic view of the tunnel slide mechanism support insert of the present invention.

Detailed Description

As shown in fig. 2, 4, 7 and 8, the utility model relates to a weak insert protection structure of an injection mold, which comprises a fixed mold plate 1, a movable mold plate 2, an insert seat 3 and two sets of tunnel slide block mechanisms 4.

The fixed die plate 1 is arranged opposite to the movable die plate 2, the insert seat 3 is connected to the movable die plate 2 in a sliding mode and located on the parting surface of the fixed die plate 1 and the movable die plate 2, a clamping groove 31 used for connecting an insert 10 is formed in the inner end of the insert seat 3, and the two sets of tunnel slider mechanisms 4 are respectively installed in the fixed die plate 1 and the movable die plate 2 and are arranged opposite to each other.

The tunnel sliding block mechanism 4 comprises an oil cylinder 41, a connecting rod 42, a guide block 43, a tunnel sliding block 44 and a plurality of thimbles 45; the cylinder body of the oil cylinder 41 is fixed on the fixed die plate 1 or the movable die plate 2, the rod end of a piston rod of the oil cylinder 41 is connected with the outer end of a guide block 43 through a connecting rod 42, the top surface or the bottom surface of the inner side of the guide block 43 is embedded and assembled with the bottom surface or the top surface of a tunnel slide block 44 in a sliding mode, the bottom surface or the top surface of the tunnel slide block 44 abuts against one end of a plurality of ejector pins 45, the other end of the ejector pins 45 extends into the die cavity and abuts against the top surface or the bottom surface of the insert 10 inserted into the die cavity, and the effect of positioning the insert 10 is achieved.

The top surface or the bottom surface of the side of the guide block 43 is an inclined surface 431, the bottom surface or the top surface of the tunnel slider 44 is an inclined surface 441, the angle of the inclined surface of the guide block is 6-10 degrees, the inclined surface 431 of the guide block 43 is in sliding connection with the inclined surface 441 of the tunnel slider 44 in a way of groove block matching, and the angle of the inclined surface 441 of the tunnel slider 44 is 6-10 degrees.

The outer end of the guide block 43 is provided with a T-shaped groove 432 which is longitudinally penetrated, the inner end of the connecting rod 42 is provided with a disc head 421, the disc head 421 is slidably connected in the T-shaped groove 432 of the guide block 43, and the outer end of the connecting rod 42 is connected with the rod end of the piston rod of the oil cylinder 41.

The working principle of the utility model is as follows:

the utility model has two sets of tunnel slide block mechanisms 4 which are respectively arranged in a fixed template 1 and a movable template 2, the power of the tunnel slide block mechanisms 4 comes from an oil cylinder 41, a piston rod of the oil cylinder 41 is connected with a guide block 43, the included angle between the action surface of the guide block 43 and the horizontal plane is 8 degrees, a tunnel slide block 44 is embedded and assembled with the guide block 43, the tunnel slide block 44 is used as an ejector plate, and an ejector 45 is fixed through a headless screw. When the mold is closed, the oil cylinder 41 pushes, the guide block 43 advances to drive the tunnel slide block 44 to move towards the mold core, so that the plurality of evenly distributed thimbles 45 touch and penetrate the slide block insert 10 from two opposite directions of the front mold and the rear mold, and sufficient support is provided for the thimbles (as shown in fig. 9). The next injection molding process is the most critical moment, the impact of the molten material and the influence of pressure difference in different directions on the deformation of the insert 10 are greatly offset by the support provided by the ejector pin 45, at the stage that the injection molding process is about to enter the pressure maintaining stage, the product 20 is basically fully filled (as shown in fig. 3), at this time, the oil cylinder 41 is controlled to be closed, the ejector pin 45 is withdrawn away from the insert 10 (as shown in fig. 6), the movement is stopped when the end surface of the ejector pin 45 is flush with the mold core glue level surface, the remaining space is continuously filled with glue and filled to be saturated, the machine enters the pressure maintaining stage, and finally the injection molding and the product discharging are completed as usual (as shown in fig. 5).

The utility model has the structural characteristics that:

the tunnel slide block 44 and the ejector pin 45 controlled by the common oil cylinder 41 are utilized, the tunnel slide block and the ejector pin are combined together, and directly act on the weak insert to provide stable protection support for the weak insert, and although one more process is provided for determining the movement time point of the ejector pin during the trial production, the tunnel slide block and the ejector pin are very worthy of comparison with the prolonged service life of the weak insert under a protection device and the overall reduced abnormal probability of injection production. The processing requirement of the protection device is not high, the increase of the size of the template can be considered in a reasonable range to facilitate the installation of the device to compensate for the strength of the template, and the overall cost can be controlled at a lower level.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the utility model, which is defined by the appended claims and their equivalents and modifications within the scope of the description.

Claims (4)

1. The utility model provides a weak mold insert protection architecture of injection mould which characterized in that: the tunnel slide block mechanism comprises a fixed template, a movable template, an insert seat and two sets of tunnel slide block mechanisms; the fixed template and the movable template are arranged oppositely, the insert seat is connected to the movable template in a sliding mode and is positioned on the parting surface of the fixed template and the movable template, the inner end of the insert seat is provided with a clamping groove for connecting an insert, and the two sets of tunnel slide block mechanisms are respectively arranged in the fixed template and the movable template and are arranged oppositely; the tunnel sliding block mechanism comprises an oil cylinder, a connecting rod, a guide block, a tunnel sliding block and a plurality of thimbles; the end of a piston rod of the oil cylinder is connected with the outer end of the guide block through a connecting rod, the top surface or the bottom surface of the inner side of the guide block is embedded with the bottom surface or the top surface of the tunnel slide block in a sliding assembly mode, the bottom surface or the top surface of the tunnel slide block abuts against one end of the ejector pins, and the other ends of the ejector pins extend into the cavity and abut against the insert inserted into the cavity, so that the insert positioning effect is achieved.

2. The weak insert protection structure of an injection mold according to claim 1, wherein: the side top surface or the bottom surface of the guide block is an inclined surface, the bottom surface or the top surface of the tunnel sliding block is an inclined surface, and the inclined surface of the guide block is in sliding connection with the inclined surface of the tunnel sliding block in a groove block matching mode.

3. The weak insert protection structure of the injection mold according to claim 2, wherein: the inclined plane angle of the guide block is 6-10 degrees, and the inclined plane angle of the tunnel sliding block is 6-10 degrees.

4. The weak insert protection structure of an injection mold according to claim 1, wherein: the outer end of the guide block is provided with a longitudinally through T-shaped groove, the inner end of the connecting rod is provided with a disc head, the disc head is connected in the T-shaped groove of the guide block in a sliding mode, and the outer end of the connecting rod is connected with the rod end of a piston rod of the oil cylinder.

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