CN111823525A

CN111823525A - High-quality injection mold with heating function

Info

Publication number: CN111823525A
Application number: CN201910320716.2A
Authority: CN
Inventors: 张明明
Original assignee: Tianjin Gengchen Precision Machinery Co ltd
Current assignee: Tianjin Gengchen Precision Machinery Co ltd
Priority date: 2019-04-20
Filing date: 2019-04-20
Publication date: 2020-10-27
Anticipated expiration: 2039-04-20
Also published as: CN111823525B

Abstract

The invention relates to an injection mold with high quality and self-heating function, which comprises a first split mold and a second split mold which are mutually covered, wherein heating holes are respectively arranged on the side wall of the first split mold and the side wall of the second split mold, heating pipes are respectively inserted into the heating holes, the heating pipes are vertical to the covering direction of the first split mold and the second split mold, one ends of the heating holes, which penetrate into the first split mold and the second split mold, are communicated with clamping holes, the aperture of each clamping hole is larger than that of each heating hole, clamping grooves which extend along the axial direction of the heating holes are arranged on the inner walls of the heating holes, the clamping grooves penetrate through the clamping holes, clamping blocks which are matched with the clamping grooves are fixedly arranged at the corresponding positions of the outer walls of the heating pipes, which are close to one ends of the clamping holes, one ends of the heating pipes, which are far away from the clamping blocks, are fixedly connected with two electrode wires, so that the injection mold is uniformly heated during injection molding, thereby achieving the effect of improving the quality of injection products.

Description

High-quality injection mold with heating function

Technical Field

The invention relates to the technical field of injection molds, in particular to a high-quality injection mold with a heating function.

Background

An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Injection molding is a processing method used for mass production of parts with complex shapes, and particularly relates to a method for injecting heated and melted plastic into a mold cavity from an injection molding machine at high pressure, and obtaining a molded product after cooling and solidification.

The existing Chinese patent with reference to the grant publication No. CN106378906B discloses an injection mold, which is formed by splicing two sub-molds, wherein a main pouring gate, a sub-pouring gate and a cavity which are sequentially communicated are arranged in the mold, a plurality of circular pits are uniformly distributed on the walls of the main pouring gate and the sub-pouring gate, each sub-mold of the mold is provided with a plurality of arc-shaped grooves which are in one-to-one correspondence with the cavity, two arc-shaped grooves at the corresponding positions of the two sub-molds are combined into a complete gradually-small round hole with gradually-decreasing inner and outer radiuses, each gradually-small round hole is internally and tightly matched with a round platform body with the shape matched with the gradually-small round hole, and the side surface of the round platform body is provided with a spiral pressure relief groove used for communicating the cavity and the.

The above prior art solutions have the following drawbacks: in the process of injection molding of the injection mold, because the molten plastic is full of the cavity for a certain time, the molten plastic in the cavity is uneven in temperature and humidity, so that the internal stress of the product exists, the strength of the product after molding is not enough, the product is easy to deform and even break, and the quality of the product after final cooling is poor.

Disclosure of Invention

The invention aims to provide a high-quality injection mold with a heating function, which can achieve the effect of improving the quality of injection products by enabling the injection mold to be heated uniformly during injection molding.

The technical purpose of the invention is realized by the following technical scheme:

the utility model provides a high quality is from injection mold of taking heating function, first minute mould and second minute mould that closes including covering each other, the heating hole has all been seted up on the lateral wall of first minute mould and the lateral wall of second minute mould, all insert in the heating hole and be equipped with the heating pipe, the cover that the first minute mould of heating pipe perpendicular to and second minute mould closes the direction, the one end intercommunication that the heating hole gos deep into first minute mould and second minute mould inside is provided with the chucking hole, the aperture in chucking hole is greater than the aperture of heating hole, set up the draw-in groove that extends along heating hole axis direction on the inner wall in heating hole, the draw-in groove runs through to the chucking hole, the outer wall corresponding position department that the heating pipe is close to chucking hole one end is fixed be provided with the fixture block with draw-in groove looks adaptation, the one end fixedly connected with two electrode wires.

Through the technical scheme, when the heating pipe is installed, the clamping block is firstly aligned to the clamping groove, then the heating pipe is inserted into the heating hole, when the end part of the heating pipe provided with the clamping block reaches the clamping hole, the heating pipe is rotated to enable the clamping block to be staggered with the clamping groove, the clamping block is abutted against the end surface of the clamping hole close to the heating hole, the heating pipe is axially limited to prevent the heating pipe from being separated from the heating hole, then the electrode wire of the heating pipe is communicated with a power supply, the first mold and the second mold are correspondingly fixed in the injection molding machine, then the molten plastic is injected into the cavity between the first split mold and the second split mold, and during the injection molding process, the heating pipe is communicated with a power supply, so that the heating pipe can heat the first die and the second die, therefore, the first die and the second die can be in an even heating state, the strength of the product after being cooled and formed is increased, and the quality is greatly improved.

The invention is further configured to: the anti-rotation groove is formed in the position of the orifice of the heating hole, the matching groove matched with the anti-rotation groove is formed in the corresponding position of the heating pipe, after the heating pipe is inserted into the heating hole, the anti-rotation groove and the matching groove are opposite to each other and are inserted with the anti-rotation rod, one part of the anti-rotation rod is located in the anti-rotation groove, and the other part of the anti-rotation rod is located in the matching groove.

Through the technical scheme, insert the heating pipe in the heating hole, and the fixture block gets into the chucking after downthehole, rotate the heating pipe, aim at until preventing that rotation groove and cooperation groove, then will prevent that the rotation pole inserts and prevent the rotation inslot, prevent that the rotation pole plays the effect of similar pin, make the heating pipe can insert inside the heating hole steadily, can not rotate easily, and then effectively prevented that the heating pipe from breaking away from in the heating hole, consequently first branch mould and second divide the mould can continuously obtain even being heated, indirectly improved the degree of consistency of being heated of product injection moulding process, therefore product quality has been improved.

The invention is further configured to: the heating pipe is close to the one end central point department of cooperation groove and has seted up the locking groove, and the locking inslot is fixed and is provided with the flexure strip of two mutual butts, and the end fixing of preventing the bull stick is provided with the horizontally connecting rod, and the connecting rod is fixed in the position department with preventing the bull stick homonymy and is provided with the latch segment, the latch segment can insert between two flexure strips and with two flexure strip elasticity butts.

Through above-mentioned technical scheme, insert the heating pipe in the heating hole to after will preventing that the bull stick inserts the anti-rotating groove and cooperation groove, the locking strip can insert between two elastic sheets correspondingly, and the elasticity clamp force of two elastic sheets can be tight with the locking strip clamp, thereby can prevent to prevent that the bull stick is not hard up, further improves and prevents that the bull stick is to preventing of heating pipe the ability of changeing.

The invention is further configured to: the anti-rotation grooves are provided with two opposite groups on two sides of the central line of the heating hole, and the corresponding matching grooves are also provided with two opposite groups on two sides of the central line of the heating pipe.

Through above-mentioned technical scheme, two sets of anti-rotating groove and two sets of cooperation grooves make the heating pipe can obtain more stable the preventing rotation fixed in the heating hole inside, therefore the heating pipe can be steadily heated continuously, ensures the degree of consistency of being heated of first branch mould and second branch mould, improves the final shaping quality of product.

The invention is further configured to: the two ends of the connecting rod are respectively fixedly connected with one anti-rotation rod, and the locking strip is positioned between the two anti-rotation rods.

Through above-mentioned technical scheme, two prevent that the bull stick inserts corresponding anti-rotating groove and cooperation inslot, further prevent that the heating pipe from taking place to rotate, and the locking strip is located two simultaneously and prevents between the bull stick, consequently after the locking strip inserts two flexure strips for the anti-rotating rod atress is even, and the locking effect of anti-rotating rod in the heating pipe is better, and the stability of heating pipe is higher.

The invention is further configured to: one side of the clamping hole, which is far away from the heating hole, is fixedly provided with an elastic piece, and the heating pipe is abutted against the elastic piece after being inserted into the heating hole.

Through the technical scheme, after the fixture block is inserted into the clamping hole, the heating pipe is rotated to enable the fixture block to be staggered with the clamping groove, the elastic piece can abut against the end portion of the heating pipe, the fixture block can abut against the hole wall, close to one side of the heating hole, of the clamping hole tightly, static friction force applied to the fixture block is increased, and therefore installation stability of the heating pipe is higher.

The invention is further configured to: two heating holes are respectively formed in the first sub-die and the second sub-die, and the two heating holes in the first sub-die and the two heating holes in the second sub-die are staggered.

Through above-mentioned technical scheme, two heating holes have respectively been seted up on first branch mould and the second divides the mould, and the heating hole that first branch mould and second divide on the mould staggers each other, consequently makes first branch mould and second divide the mould to be heated more comprehensively, and heating effect is better, makes the product quality after the shaping higher correspondingly.

The invention is further configured to: the first die cavity is formed in the first die cavity, the second die cavity matched with the first die cavity is formed in one side, facing the first die cavity, of the second die cavity, the distance between the first heating hole and the first die cavity is two thirds of the thickness of the first die cavity, and the distance between the second heating hole and the second die cavity is two thirds of the thickness of the second die cavity.

Through above-mentioned technical scheme, the distance between first heated orifice and the first die cavity is two-thirds of first submould thickness, and the distance between second heated orifice and the second die cavity is two-thirds of second submould thickness, after designing like this for the degree of being heated of the molten plastics in first die cavity and the second die cavity is similar, and consequently the molten plastics in first die cavity and the second die cavity are heated more evenly, and product shaping quality further improves.

In conclusion, the beneficial technical effects of the invention are as follows:

1. heating holes are formed in the first sub-mold and the second sub-mold, and adaptive heating pipes are inserted into the heating holes, so that the first sub-mold and the second sub-mold are heated more uniformly when a product is injection-molded, and the molding quality of the product is higher;

2. the clamping hole communicated with the heating hole is formed, and the clamping block in sliding fit with the clamping groove is arranged, so that the clamping block can rotate to abut against the wall, close to the heating hole, of the clamping hole after entering the clamping hole, and the heating pipe is effectively prevented from being separated from the heating hole;

3. the anti-rotation rod is inserted into the anti-rotation groove and the matching groove, so that the heating pipe cannot rotate, and the heating stability of the heating pipe to the first die and the second die is further improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a first split mold;

FIG. 3 is a schematic structural view of a second split mold;

FIG. 4 is a partial schematic view of the first split mold after being cut in half;

FIG. 5 is a schematic view of a partial structure of the first split mold after being vertically cut in half;

fig. 6 is a partially enlarged schematic view of a portion a of fig. 5.

Reference numerals: .

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a high quality is from injection mold of taking heating function, combine fig. 2 and fig. 3, divide mould 2 including the first branch mould 1 and the second that each other approximately closes, first die cavity 11 has been seted up to a side surface of first branch mould 1, second divide mould 2 just to a side surface of first branch mould 1 set up with the second die cavity 21 of 11 looks adaptations of first die cavity, set up the hole 12 of moulding plastics that runs through to first die cavity 11 on the first branch mould 1, set up a plurality of liftout holes 22 that run through to second die cavity 21 on the second branch mould 2, heating hole 3 has all been seted up on first branch mould 1 and the second branch mould 2, the interpolation of heating hole 3 is equipped with the heating pipe 4 of looks adaptation. When injection molding is carried out, referring to fig. 1, a first mold half 1 and a second mold half 2 are fixedly connected with corresponding positions of an injection molding machine and are mutually covered (belonging to the prior art and not being described herein), then an injection molding needle of the injection molding machine is inserted into an injection molding hole 12, molten plastic is injected into a first cavity 11 and a second cavity 21, after the molten plastic which is injected is cooled, the first mold half 1 and the second mold half 2 are separated, and a product is ejected out of the second cavity 21 through an ejector pin, so that the demolding operation is completed; in the injection molding process, the heating pipe 4 heats the first sub-mold 1 and the second sub-mold 2, so that the molten plastic is heated more uniformly in the first cavity 11 and the second cavity 21, the internal stress generated by the product is small, the process of molding the product is more stable, and the production quality of the product is higher.

As shown in fig. 1, the opening direction of the heating hole 3 is perpendicular to the covering direction of the first mold half 1 and the second mold half 2, the heating holes 3 on the first mold half 1 and the second mold half 2 are respectively opened by two, two heating holes 3 on the first mold half 1 are located at positions close to two sides of the first mold half 1, two heating holes 3 on the second mold half 2 are located at positions close to the middle position of the second mold half 2, the heating holes 3 on the first mold half 1 and the second mold half 2 are staggered, so that the heating pipe 4 in the heating hole 3 can comprehensively heat the first mold half 1 and the second mold half 2 after being electrified, and the heating uniformity is further improved.

Referring to fig. 4 and 5, one end of the heating hole 3 extending into the first mold half 1 and one end of the second mold half 2 are communicated with each other to form a clamping hole 31, the aperture of the clamping hole 31 is larger than that of the heating hole 3, the opening of the clamping hole 31 near the heating hole 3 is the same as that of the heating hole 3, the inner walls of two opposite sides of the heating hole 3 are provided with clamping grooves 32, the clamping grooves 32 penetrate the clamping hole 31, one end of the heating tube 4 is fixedly provided with two electrode wires 42, the circumferential side wall position of the end far away from the electrode wires 42 is fixedly provided with two clamping blocks 41 facing each other, the clamping blocks 41 are in sliding fit with the clamping grooves 32, therefore, when the heating tube 4 is inserted into the heating hole 3, the clamping blocks 41 can be aligned with the clamping grooves 32, after the clamping blocks 41 slide into the clamping holes 31, the heating tube 4 is rotated to stagger the clamping blocks 41 with the clamping grooves 32, so that the clamping blocks 41 are abutted, so as to fix the heating pipe 4 and prevent the heating pipe 4 from being separated from the heating hole 3.

As shown in fig. 5, an elastic member 311 is fixedly disposed at a bottom of the heating hole 3 of the clamping hole 31, the elastic member 311 is a good object with good elastic potential energy, and the embodiment is preferably a spring, and when the spring is in a natural state, one end of the spring close to the heating hole 3 is flush with an opening of the heating hole 3, when the heating tube 4 is inserted into the heating hole 3 and the fixture block 41 is slid into the clamping hole 31, the heating tube 4 can abut against the elastic member 311 and compress the elastic member 311, the fixture block 41 abuts against a wall of the clamping hole 31 after the heating tube 4 is rotated, and an elastic restoring force of the elastic member 311 can tightly abut the fixture block 41 against the wall of the clamping hole 31, so as to increase a friction force of the fixture block 41, thereby further improving a mounting stability of the heating tube 4.

Referring to fig. 5 and 6, two matching grooves 43 facing each other are formed on a circumferential side wall of one end of the heating tube 4 away from the fixture block 41, the matching grooves 43 are formed along an axial direction of the heating tube 4, a connection line between the matching grooves 43 is parallel to a connection line between the fixture blocks 41, a pair of anti-rotation grooves 33 are formed at an orifice position of the heating hole 3, the connection line between the anti-rotation grooves 33 is perpendicular to a connection line between the clamping grooves 32, the anti-rotation grooves 33 and the matching grooves 43 have the same size, after the heating tube 4 is inserted into the heating hole 3 and the heating tube 4 is rotated, the anti-rotation grooves 33 and the matching grooves 43 face each other, at this time, anti-rotation rods 5 are clamped in each group of anti-rotation grooves 33 and matching grooves 43 facing each other, half of the anti-rotation rods 5 are in sliding fit with the anti-rotation grooves 33, and the other half of the anti-rotation rods are in sliding fit with the, the installation stability of the heating pipe 4 is further improved.

As shown in fig. 6, a connecting rod 51 is fixedly connected between two rotation-preventing rods 5, the connecting rod 51 is perpendicular to the axis of the heating tube 4, a locking strip 52 is fixedly arranged at the middle position of the connecting rod 51, the locking strip 52 and the rotation-preventing rod 5 are located at the same side position, a locking groove 44 is formed at the central position of the end of the heating tube 4 close to one end of the rotation-preventing rod, two elastic pieces 441 abutted against each other are fixedly arranged in the locking groove 44, the elastic pieces 441 are made of elastic material, after the rotation-preventing rod 5 is inserted into the rotation-preventing groove 33 and the matching groove 43, the locking strip 52 is correspondingly inserted between the two elastic pieces 441, the elastic clamping force of the two elastic pieces 441 enables the rotation-preventing rod 5 to be stably kept in the rotation-preventing groove 33 and the matching groove 43, so that the installation stability of the heating tube 4 is further improved, and the heating tube 4 is not heated, the molding quality of the injection molding product in the injection molding process is indirectly improved.

The implementation principle of the embodiment is as follows: before the first split mold 1 and the second split mold 2 are installed, the heating tube 4 is firstly inserted into the heating hole 3 until the fixture block 41 slides into the clamping hole 31 along the fixture groove 32, then, the heating tube 4 is rotated to make the clamping block 41 abut against the wall of the clamping hole 31 at the end close to the heating hole 3, the end of the heating tube 4 is tightly abutted by the elastic member 311, and the rotation-preventing groove 33 and the matching groove 43 are aligned with each other, then, the rotation preventing lever 5 is aligned with the rotation preventing groove 33 and the fitting groove 43, so that the rotation preventing lever 5 is inserted into the rotation preventing groove 33 and the fitting groove 43, after the rotation preventing bar 5 is completely inserted into the rotation preventing groove 33 and the fitting groove 43, the locking bar 52 is inserted between the two elastic pieces 441, thereby make prevent that the commentaries on classics pole 5 can block heating pipe 4 steadily, prevent that heating pipe 4 from rotating, install first minute mould 1 and second minute mould 2 on the injection molding machine finally to electrode line 42 connects the power. When moulding plastics, heating pipe 4 can divide mould 1 and the continuous heating of second branch mould 2 to make the material in first die cavity 11 and the second die cavity 21 be heated evenly when moulding plastics, reduce the product because the internal stress that is heated uneven and produces improves product quality.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a high quality is from injection mold who takes heating function, includes first minute mould (1) and second minute mould (2) that each other approximately closes, its characterized in that: heating hole (3) have all been seted up on the lateral wall of first minute mould (1) and the lateral wall of second minute mould (2), all insert in heating hole (3) and be equipped with heating pipe (4), the lid of heating pipe (4) perpendicular to first minute mould (1) and second minute mould (2) closes the direction, heating hole (3) go deep into first minute mould (1) and the inside one end intercommunication of second minute mould (2) is provided with chucking hole (31), the aperture of chucking hole (31) is greater than the aperture of heating hole (3), set up draw-in groove (32) that extend along heating hole (3) axis direction on the inner wall of heating hole (3), draw-in groove (32) run through to chucking hole (31), heating pipe (4) are close to the outer wall corresponding position department of chucking hole (31) one end and are fixed be provided with draw-in groove (32) looks adaptation fixture block (41), the one end fixedly connected with two electrode wires (42) of heating pipe (4) keeping away from fixture block (41).

2. The high-quality injection mold with the heating function is characterized in that: the drill way position department of heating hole (3) has seted up anti-rotating groove (33), the cooperation groove (43) with anti-rotating groove (33) looks adaptation is seted up in the corresponding position department of heating pipe (4), after heating pipe (4) inserted heating hole (3), anti-rotating groove (33) and cooperation groove (43) just have inserted and have prevented changeing pole (5), and a part of preventing changeing pole (5) is located anti-rotating groove (33), and another part is located cooperation groove (43).

3. A high quality self-heating injection mold as defined in claim 2, wherein: the heating pipe (4) is close to the one end central point department of cooperation groove (43) and has seted up locking groove (44), locking groove (44) internal fixation is provided with two elastic sheet (441) of mutual butt, the end fixing of preventing bull stick (5) is provided with horizontally connecting rod (51), connecting rod (51) are fixed in the position department with preventing bull stick (5) homonymy and are provided with locking strip (52), locking strip (52) can insert between two elastic sheet (441) and with two elastic sheet (441) elasticity butt.

4. A high quality self-heating injection mold as defined in claim 3, wherein: two opposite groups of anti-rotation grooves (33) are arranged on two sides of the central line of the heating hole (3), and two opposite groups of anti-rotation grooves (43) are correspondingly arranged on two sides of the central line of the heating pipe (4).

5. A high quality injection mold with heating function according to claim 4, characterized in that: both ends of connecting rod (51) each fixedly connected with prevent bull stick (5), and locking strip (52) are located between two prevent bull sticks (5).

6. The high-quality injection mold with the heating function is characterized in that: one side of the clamping hole (31) deviating from the heating hole (3) is fixedly provided with an elastic piece (311), and the heating pipe (4) is inserted into the heating hole (3) and then is abutted to the elastic piece (311).

7. The high-quality injection mold with the heating function is characterized in that: two heating holes (3) are respectively formed in the first mold (1) and the second mold (2), and the two heating holes (3) in the first mold (1) and the two heating holes (3) in the second mold (2) are staggered.

8. The high-quality injection mold with the heating function is characterized in that: first die cavity (11) have been seted up on first minute mould (1), second die cavity (21) of looks adaptation are seted up towards one side of first die cavity (11) in second minute mould (2), and the distance between first heating hole (3) and first die cavity (11) is two-thirds of first minute mould (1) thickness, and the distance between second heating hole (3) and second die cavity (21) is two-thirds of second minute mould (2) thickness.