CN223890396U - Injection mold with limited side edges - Google Patents

Abstract

This utility model discloses a side-limiting injection mold in the field of injection molds, including an upper mold and a lower mold. The upper mold includes an upper top plate and an upper bottom plate, which are connected by screws. The lower mold includes a lower bottom plate, a mold core plate, and a limiting plate, which are connected by screws. The mold core plate and the limiting plate are also connected by screws. An upper mold box is provided at one end of the upper bottom plate, and a lower mold box is provided at one end of the mold core plate. In this side-limiting injection mold, a positioning plate and positioning blocks at both ends of the mold core plate are provided on the surface of the mold core plate and are firmly connected to the mold core plate by long screws, ensuring accurate positioning of the lower mold box during the mold closing process. The limiting blocks on the positioning plate further limit the lower mold box laterally, effectively preventing mold displacement caused by pressure during injection molding and improving the accuracy and stability of injection molding.

Description

Injection mold with limited side edges

Technical Field

The utility model relates to the field of injection molds, in particular to a side limit injection mold.

Background

The injection mould is a tool for injection moulding process, which can inject thermoplastic plastics or thermosetting plastics into a mould cavity under the action of high temperature and high pressure of an injection machine, and obtain plastic products with required shape and size after cooling and shaping. In short, the injection mold acts like a "molding cradle" for the plastic article, determining the final appearance, structure and properties of the plastic article. The precision and quality of the injection mold directly affect the dimensional precision, appearance quality and physical properties of the plastic product. The high-precision die can produce plastic products with stable quality and meeting design requirements. Through the injection mold of different shapes, structures and functions of design and manufacturing, can realize the diversification and the innovation of plastic products, satisfy different user's demands.

The existing injection mold has the defects that firstly, the traditional mold depends on a simple guide post and a simple guide sleeve to realize the alignment of an upper mold and a lower mold, but when in high-pressure injection molding (the pressure is usually tens to hundreds of megapascals), the mold assembly bears huge impact force. When the strength is insufficient or the connection stability is poor (such as the screw fixation is not firm), the mold core plate and the mold cavity are only connected through common screws, lateral constraint is lacked, the screws can be loosened under high pressure, key components such as the mold cavity on the mold core plate are easy to slightly displace, the mold cavity is misplaced, uneven filling of plastic is easy to be caused, and the wall thickness of the product is deviated or flash occurs. Most molds rely solely on vertical orientation and lack lateral spacing. In the injection molding process, the side impact force (especially the asymmetric structural product) generated by the high-speed injection of the molten plastic into the cavity can push the mold cavity on the mold core plate to slide laterally. Secondly, dislocation offset of key components such as a model cavity and a die core plate can lead to incomplete alignment of an upper die and a lower die during die assembly, dislocation exists at the initial position of the model cavity, dynamic offset in the initial dislocation superposition injection molding process is remarkably reduced, product consistency is remarkably reduced, deformation is carried out under frequent high-pressure impact, gaps are easy to generate on a closed surface, periodic size fluctuation of products is caused, yield is reduced during mass production, and product precision after injection molding is easily reduced.

Disclosure of utility model

In order to overcome the defects of the prior art, the utility model provides the side limit injection mold, which can effectively solve the technical problems that the existing injection mold is low in injection precision and easily causes the deviation of a mold cavity in the injection process.

The side limit injection mold comprises an upper mold and a lower mold, wherein the upper mold comprises an upper top plate and an upper bottom plate, the upper top plate and the upper bottom plate are connected through screws, the lower mold comprises a lower bottom plate, a cavity plate and a limit plate, the lower bottom plate and the limit plate are connected through screws, the cavity plate and the limit plate are connected through screws, an upper mold box is arranged at one end of the upper bottom plate, a lower mold box is arranged at one end of the cavity plate, the upper mold box and the lower mold box are of hollow structures, mold cavities are jointly formed in the surfaces of the upper mold box and the lower mold box, two positioning plates are arranged at two ends of each positioning plate, long screws are arranged on the surfaces of the positioning plates, the positioning plates are connected with the cavity plate through long screws, limit blocks for limiting the lower mold box are arranged on the surfaces of the positioning plates, a plurality of fixing plates are arranged through screws, adjacent fixing plates are distributed between the fixing plates, and the fixing blocks are arranged at one end, and the fixing blocks are arranged at the side surfaces of the fixing plates.

Further, two pushing plates are arranged on the surface of the lower bottom plate, a plurality of vertical pushing rods are arranged on the pushing plates, a plurality of guide holes are formed in the lower die box, one end of each pushing rod penetrates through the die core plate and extends to the inner part of the lower die box, and the top of each pushing rod penetrates into each guide hole to achieve ejection.

Further, the surface of the upper top plate is provided with an injection molding pipe, and one end of the injection molding pipe extends to the inside of the upper die box.

Further, the inside of mould benevolence board is provided with a plurality of metal pipes that switch on, the one end of metal pipe extends to the outside of mould benevolence board, the one end of metal pipe is provided with the inlet, the inside of mould benevolence board is provided with the heat pipe of horizontal, the one end of metal pipe with the heat pipe switches on, the both ends of heat pipe extend to the outside of mould benevolence board.

Further, the inside of upper plate is provided with a plurality of connecting pipes that switch on, the one end of connecting pipe extends to the outside of upper plate, the one end of connecting pipe is provided with the inlet port, the inside of upper plate is provided with the fixed pipe of horizontal, the one end of connecting pipe with the fixed pipe switches on, the both ends of fixed pipe extend to the outside of upper plate.

Compared with the prior art, the side limit injection mold has the beneficial effects that the locating plate arranged on the surface of the mold core plate and the locating blocks at the two ends of the locating plate are firmly connected with the mold core plate through the long screws, so that the accurate location of the lower mold box in the mold closing process is ensured, the limiting block on the locating plate further carries out side limit on the lower mold box, the mold cavity deviation caused by pressure in the injection molding process is effectively prevented, and the precision and the stability of injection molding are improved.

Drawings

FIG. 1 is a perspective view of a side-limiting injection mold of the present utility model;

FIG. 2 is a schematic diagram of the internal structure of an injection mold with side limit according to the present utility model;

fig. 3 is a schematic structural view of a lower mold box of an injection mold with side limit according to the present utility model.

Reference numerals in the drawings:

1-upper top plate, 2-upper bottom plate, 3-lower bottom plate, 4-limit plate, 5-core plate, 6-injection molding pipe, 7-inlet, 8-fixed pipe, 9-liquid inlet, 10-heat conducting pipe, 11-limit block, 12-push plate, 13-push rod, 14-upper die box, 15-lower die box, 16-die cavity, 17-positioning block, 18-connecting pipe, 19-long screw, 20-positioning plate, 21-metal pipe, 22-fixed plate, 23-fixture block and 24-guide hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

A side-limiting injection mold according to the present utility model is described in detail below with reference to fig. 1-3:

the utility model provides a spacing injection mold of side, includes mould and lower mould, it includes roof 1 and upper plate 2 to go up the mould, go up and connect through the screw between roof 1 and the upper plate 2, the lower mould includes lower plate 3, mould benevolence board 5 and limiting plate 4, connect through the screw between lower plate 3 and the limiting plate 4, connect through the screw between mould benevolence board 5 and the limiting plate 4, the one end of upper plate 2 is provided with mould box 14, the one end of mould benevolence board 5 is provided with lower mould box 15, the inside of last mould box 14 and lower mould box 15 is hollow structure, go up mould box 14 and lower mould box 15 and constitute mould die cavity 16 jointly, the surface of mould benevolence board 5 is provided with two locating plates 20, the both ends of locating plate 20 all are provided with locating piece 17, the surface of locating piece 17 is provided with long screw 19, locating piece 17 pass through long screw 19 with mould benevolence board 5 is connected, the surface of locating plate 20 is provided with down mould box 15 carries out limiting block 11, the inside of mould box 14 and lower mould box 15 is provided with cavity 15, the inside of mould box 15 is hollow structure, the inside of mould box 14 and lower mould box 15 is provided with two locating plates 20, the fixed surface that is provided with two equal faces of locating plate 20 through the fixed plate 23, the fixed surface that is provided with 23 between the fixed block 23 and the fixed plate 23.

The surface of lower plate 3 is provided with two push plates 12, push plate 12 is provided with a plurality of vertically push rods 13, the inside of lower die box 15 is provided with a plurality of guide holes 24, the one end of push rod 13 runs through mould benevolence board 5 and extends to the inside of lower die box 15, the top of push rod 13 penetrates guide hole 24 and realizes ejecting, the surface of upper plate 1 is provided with injection molding pipe 6, the one end of injection molding pipe 6 extends to the inside of upper die box 14.

The inside of mould benevolence board 5 is provided with a plurality of metal pipes 21 that switch on, the one end of metal pipe 21 extends to the outside of mould benevolence board 5, the one end of metal pipe 21 is provided with inlet 9, the inside of mould benevolence board 5 is provided with horizontal heat pipe 10, the one end of metal pipe 21 with heat pipe 10 switches on, the both ends of heat pipe 10 extend to the outside of mould benevolence board 5, the inside of upper plate 2 is provided with a plurality of connecting pipes 18 that switch on, the one end of connecting pipe 18 extends to the outside of upper plate 2, the one end of connecting pipe 18 is provided with inlet port 7, the inside of upper plate 2 is provided with horizontal fixed pipe 8, the one end of connecting pipe 18 with fixed pipe 8 switches on, the both ends of fixed pipe 8 extend to the outside of upper plate 2.

In the embodiment, the surface of the upper top plate 1 is provided with an injection molding pipe 6, the injection molding pipe 6 extends into the upper die box 14, a sealing rubber ring is adopted between the injection molding pipe 6 and the upper top plate 1 to seal, molten plastics are prevented from leaking in the injection molding process, the inner walls of the upper die box 14 and the lower die box 15 are processed with high precision, the surface finish of a die cavity 16 is ensured, the defects of products after injection molding are reduced, the lower bottom plate 3 and the limiting plate 4, the die cavity plate 5 and the limiting plate 4 are connected through screws, the lower die box 15 is precisely positioned and laterally limited through a positioning block 17 and a limiting block 11 which are arranged, the positioning block 17 is connected with the die cavity plate 5 through long screws 19, the specification and the quantity of the long screws 19 are selected according to the size and the stress condition of the positioning block 17, the stability and reliability of the positioning block 17 are ensured, the top of a push rod 13 penetrates into a guide hole 24 in the lower die box 15, the design of the guide hole 24 ensures that the push rod 13 can move linearly in the ejection process, the ejection efficiency is improved, the push rod 13 and the push plate 12 can be driven to move by installing an air cylinder or a hydraulic cylinder or an electric cylinder at the bottom of the push rod 13, the injection molding product in the mold cavity 16 is ejected out rapidly, a cooling system adopts a circulating water cooling mode, cooling water is uniformly distributed into the mold cavity plate 5 through the metal pipe 21 and the heat conducting pipe 10, the mold temperature in the injection molding process is effectively reduced, the quality and the efficiency of injection molding are improved, the cooling system of the upper base plate 2 and the cooling system of the mold cavity plate 5 are mutually independent, but can be cooled by the same cooling equipment, the cooling efficiency is improved, molten plastic enters the mold cavity 16 through the injection molding pipe 6 in the injection molding process, after the injection molding is cooled and molded in the mold cavity 16, the push plate 12 ejects the molded product out of the mold cavity 16 through the push rod 13, and completes one injection molding cycle, the cooling system continuously works in the whole injection molding process, so that the temperature of the mold is ensured to be stable in a proper range, and the quality and the efficiency of injection molding are improved.

According to the side limit injection mold, the locating plate 20 arranged on the surface of the mold core plate 5 and the locating blocks 17 at the two ends of the locating plate are firmly connected with the mold core plate 5 through the long screws 19, so that accurate positioning of the lower mold box 15 in the mold closing process is ensured, the limiting block 11 on the locating plate 20 further carries out lateral limit on the lower mold box 15, the deviation of the mold cavity 16 caused by pressure in the injection molding process is effectively prevented, and the precision and stability of injection molding are improved.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (5)

1. The utility model provides a spacing injection mold of side, includes mould and lower mould, it includes roof and upper plate to go up the mould, connect through the screw between roof and the upper plate, the lower mould includes lower plate, mould benevolence board and limiting plate, connect through the screw between lower plate and the limiting plate, connect through the screw between mould benevolence board and the limiting plate, the one end of upper plate is provided with the mould box, the one end of mould benevolence board is provided with the lower mould box, the inside of going up mould box and lower mould box is hollow structure, go up mould box and lower mould box and constitute the mould die cavity jointly, its characterized in that, the surface of mould benevolence board is provided with two locating plates, the both ends of locating plate all are provided with the locating piece, the surface of locating piece be provided with long screw with the mould benevolence board is connected, the surface of locating plate is provided with down the stopper that the mould box carries out the limit, the surface of locating plate is provided with a plurality of fixed plates through the screw, arrange the equidistant one end of arranging between the adjacent fixed plate, the side of locating plate is provided with the fixture block, the fixture block is connected with the surface.

2. The injection mold with side limit according to claim 1, wherein two pushing plates are arranged on the surface of the lower bottom plate, a plurality of vertical pushing rods are arranged on the pushing plates, a plurality of guide holes are formed in the lower mold box, one end of each pushing rod penetrates through the mold core plate and extends to the interior of the lower mold box, and the top of each pushing rod penetrates through each guide hole to achieve ejection.

3. The side-limiting injection mold of claim 1, wherein the surface of the upper top plate is provided with an injection tube, and one end of the injection tube extends into the upper mold box.

4. The injection mold with side limit according to claim 1, wherein a plurality of conductive metal pipes are arranged in the mold core plate, one ends of the metal pipes extend to the outside of the mold core plate, liquid inlets are formed in one ends of the metal pipes, a transverse heat conducting pipe is arranged in the mold core plate, one ends of the metal pipes are communicated with the heat conducting pipe, and two ends of the heat conducting pipe extend to the outside of the mold core plate.

5. The injection mold with side limit according to any one of claims 1 to 4, wherein a plurality of conducting connecting pipes are arranged in the upper base plate, one ends of the connecting pipes extend to the outer part of the upper base plate, one ends of the connecting pipes are provided with inlet openings, a transverse fixing pipe is arranged in the upper base plate, one ends of the connecting pipes are conducted with the fixing pipe, and two ends of the fixing pipe extend to the outer part of the upper base plate.