CN114734588B

CN114734588B - Injection mold for electrical appliance wiring shell

Info

Publication number: CN114734588B
Application number: CN202210398921.2A
Authority: CN
Inventors: 鄢天灿; 龙湖海; 梅益; 陈刚; 付同福; 潘盛贵; 王文华; 沈立胜; 郁金松; 袁勇; 管进
Original assignee: Guizhou Power Grid Co Ltd
Current assignee: Guizhou Power Grid Co Ltd
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2023-12-01
Anticipated expiration: 2042-04-15
Also published as: CN114734588A

Abstract

The invention discloses an injection mold for an electrical appliance wiring shell, which comprises a mold unit, a material ejection assembly and a core pulling assembly, wherein the mold unit comprises a molding assembly; the telescopic unit comprises a shell, a liquid supply assembly arranged in the shell and a transmission assembly arranged outside the shell; the die unit is fixedly connected with the telescopic unit. The shell mold has the beneficial effects that the shell mold is simple in structure, high in molding precision and surface quality, short in production period and high in efficiency, and meanwhile, the parameter setting is reasonable, so that the warp deformation is not easy to generate; the telescopic unit can play a role in temporarily supporting the die and can also be used for temporarily driving the movable die.

Description

Injection mold for electrical appliance wiring shell

Technical Field

The invention relates to the technical field of injection molds, in particular to an injection mold for an electrical appliance wiring shell.

Background

In recent years, electrical housing parts have been increasingly used in the power industry, and most of the housing parts are molded from plastic products, which have become one of the fastest growing fields in the materials industry. However, the traditional compression molding, extrusion molding and other processes are adopted to produce electrical appliance shell cover products, so that the molding precision and quality of the products are difficult to ensure, and the use requirements cannot be met.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.

The present application has been made in view of the above-mentioned or existing problems occurring in the prior art.

Therefore, the application aims to provide the injection mold for the electrical appliance wiring shell, which solves the problems of unreasonable structural design, parameter setting and the like of the existing electrical appliance wiring shell mold, and also solves the problem that the production is affected because other pushing pieces for temporarily replacing functions of the pushing pieces of the primary moving mold are not available under the condition of failure of the pushing pieces of the primary moving mold.

In order to solve the technical problems, the application provides the following technical scheme: an injection mold for an electrical appliance wiring shell comprises a mold unit, a molding assembly, a material ejection assembly and a core pulling assembly, wherein the material ejection assembly and the core pulling assembly are arranged in the molding assembly; the telescopic unit comprises a shell, a liquid supply assembly arranged in the shell, and a transmission assembly arranged outside the shell; the die unit is fixedly connected with the telescopic unit.

As a preferable scheme of the injection mold for the electrical appliance wiring shell, the invention comprises the following steps: the molding assembly comprises a movable template, a fixed template, a movable die insert arranged on the upper side of the movable template, a fixed die insert arranged on the lower side of the fixed template, guide posts penetrating through the periphery of the movable template, guide sleeves penetrating through the periphery of the fixed template, a fixed die seat plate arranged on the upper side of the fixed template, a sprue bush penetrating through the centers of the fixed template, the fixed die insert and the fixed die seat plate, a movable die base plate arranged on the lower side of the movable template, a group of cushion blocks arranged on the lower side of the movable die base plate, a movable die seat plate arranged on the lower side of the cushion blocks, a cooling water channel penetrating through the interiors of the movable die insert and the fixed die insert, and a positioning ring arranged at the upper end of the sprue bush; the movable mould plate is fixedly connected with the movable mould insert; the fixed die plate is fixedly connected with the fixed die insert; the guide post is movably connected with the guide sleeve; the fixed die plate is fixedly connected with the fixed die seat plate; the sprue bush is fixedly connected with the fixed die plate, the fixed die insert and the fixed die seat plate respectively; the movable template, the movable die base plate, the cushion block and the movable die base plate are sequentially and fixedly connected; the positioning ring is fixedly connected with the fixed die seat plate.

As a preferable scheme of the injection mold for the electrical appliance wiring shell, the invention comprises the following steps: the ejection assembly comprises a push plate arranged on the upper side of the movable die seat plate, a push rod fixing plate arranged on the upper side of the push plate, a group of push rods arranged on the upper side of the push rod fixing plate, a pull rod arranged at the center of the push rod fixing plate, reset rods arranged on the upper side of the push rod fixing plate in an array manner, reset springs arranged on the outer circumference of the reset rods and countersunk holes penetrating through the center of the movable die seat plate; the movable die seat plate is movably connected with the push plate; the push plate is fixedly connected with the push rod fixing plate; the push rod fixing plate is fixedly connected with the push rod, the material pulling rod and the reset rod respectively; and two ends of the reset spring are respectively connected with the movable template and the push rod fixing plate.

As a preferable scheme of the injection mold for the electrical appliance wiring shell, the invention comprises the following steps: the core pulling assembly comprises a sliding block arranged on the side edges of the movable die insert and the fixed die insert, an inclined guide post arranged on the upper inclined side of the sliding block, a compression block arranged at the outer end of the fixed die plate and a side core arranged on the other side of the movable die insert and the fixed die insert; the sliding block is movably connected with the inclined guide post; the inclined guide post is fixedly connected with the fixed template; the compressing block is fixedly connected with the fixed template.

As a preferable scheme of the injection mold for the electrical appliance wiring shell, the invention comprises the following steps: the core pulling assembly further comprises a limiting device arranged on the outer side of the movable template and a limiting screw arranged on the outer edge of the movable template; and the limiting device is fixedly connected with the sliding block.

As a preferable scheme of the injection mold for the electrical appliance wiring shell, the invention comprises the following steps: the shell comprises a liquid supply cavity and a liquid storage cavity which are arranged in the shell, and a baffle plate which is arranged between the liquid supply cavity and the liquid storage cavity; the liquid supply cavity comprises a lifting cavity, a containing cavity, a supporting piston and a supporting platform, wherein the lifting cavity and the containing cavity are arranged in the liquid supply cavity; the liquid storage cavity comprises an adjusting channel which is communicated with the side wall of the shell, an adjusting piston which is arranged in the adjusting channel, and an adjusting spring which is arranged at one side of the adjusting piston; the partition plate comprises a communication port which is communicated with the surface of the partition plate; the supporting piston is movably connected with the lifting cavity; the supporting piston is fixedly connected with the supporting platform; the adjusting channel is movably connected with the adjusting piston; the adjusting spring is fixedly connected with the adjusting piston and the inner wall of the shell respectively.

As a preferable scheme of the injection mold for the electrical appliance wiring shell, the invention comprises the following steps: the liquid supply assembly comprises a shell, an end cover arranged at one side of the shell, a movable sleeve penetrating through the middle of the end cover, and an accompanying piston and pressure relief assembly arranged in the shell; the shell is fixedly connected with the end cover; the movable sleeve is movably connected with the end cover; the accompanying piston is connected with the movable sleeve through a key; the accompanying piston is movably connected with the shell.

As a preferable scheme of the injection mold for the electrical appliance wiring shell, the invention comprises the following steps: the shell comprises a pair of first liquid supply holes arranged on the upper side of the shell, a pair of second liquid supply holes arranged on the lower side of the shell, conical ports penetrating through the first liquid supply holes and the second liquid supply holes, a first piston and a second piston arranged in the first liquid supply holes, and a third piston and a fourth piston arranged in the second liquid supply holes; the accompanying piston comprises a rod body, a connector arranged at one end of the rod body, a piston arranged at the other end of the rod body and a cam arranged at the other end of the piston; the second piston comprises a bulge arranged at the bottom end of the second piston; the third piston comprises a connecting ring arranged at the top end of the third piston; the second liquid supply hole is fixedly connected with the communication port; the heads of the first piston, the second piston, the third piston and the fourth piston are matched with the conical ports.

As a preferable scheme of the injection mold for the electrical appliance wiring shell, the invention comprises the following steps: the pressure relief assembly comprises a bracket, an accompanying rod arranged at the bottom of the bracket and traction springs arranged at the upper side and the lower side of the bracket; the accompanying rod comprises a first limit partition arranged on one side of the accompanying rod; the bracket comprises a second limiting partition arranged at one end of the bracket; the bracket is connected with the shell through a hinge; the accompanying rod is connected with the bracket through a hinge; the traction spring is fixedly connected with the inner wall of the shell and the bracket respectively.

As a preferable scheme of the injection mold for the electrical appliance wiring shell, the invention comprises the following steps: the transmission assembly comprises a knob arranged on the rod body, a transmission arm arranged on the outer circumference of the connector, a motor arranged at the upper end of the shell, and a transmission disc arranged at the shaft end of the motor; the transmission arm comprises a limit groove arranged at one end of the transmission arm; the transmission disc comprises a transmission column arranged at the outer edge of the transmission column; the knob is connected with the rod body through a key; the knob is movably connected with the shell; the transmission arm is movably connected with the connector; the transmission disc is fixedly connected with the shaft end of the motor; the limit groove is movably connected with the transmission column.

The invention has the beneficial effects that: the shell mold has the advantages of simple structure, high molding precision and surface quality, short production period, high efficiency, reasonable parameter setting and difficult generation of buckling deformation; the telescopic unit can play a role in temporarily supporting the die and can also be used for temporarily pushing the movable die.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a top view of a housing mold of an electrical connection housing injection mold.

Fig. 2 is a schematic sectional view of the injection mold for the electrical connection housing of fig. 1 rotated 90 ° A-A clockwise.

Fig. 3 is a schematic cross-sectional view of the electrical connection housing injection mold of fig. 1 rotated 90 ° B-B clockwise.

Fig. 4 is a schematic perspective view of an electrical connection housing plastic part of an electrical connection housing injection mold.

Fig. 5 is a schematic diagram of a right-hand structure of an electric appliance wiring housing plastic part of an electric appliance wiring housing injection mold.

Fig. 6 is a front view of the telescoping unit of the electrical connection housing injection mold.

Fig. 7 is a left side view of the telescoping unit of the electrical connection housing injection mold.

Fig. 8 is a schematic diagram of a sectional structure of a telescopic unit C-C of an injection mold for an electrical connection housing.

Fig. 9 is a schematic diagram of a liquid supply assembly of an electrical connection housing injection mold in full section.

Fig. 10 is a cam structure display view of an electric appliance wiring housing injection mold.

Fig. 11 is a schematic view of a bracket of an injection mold for an electrical connection housing.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 11, in a first embodiment of the present invention, an injection mold for an electrical appliance wiring housing is provided, which includes a mold unit 100 including a molding assembly 101, and a top material assembly 102 and a core pulling assembly 103 disposed inside the molding assembly 101;

the telescopic unit 200 comprises a shell 201, a liquid supply assembly 202 arranged inside the shell 201, and a transmission assembly 203 arranged outside the shell 201;

the mold unit 100 is fixedly connected with the telescopic unit 200.

Further, the molding assembly 101 includes a movable platen 101a, a fixed platen 101b, a movable die insert 101c disposed on an upper side of the movable platen 101a, a fixed die insert 101d disposed on a lower side of the fixed platen 101b, a guide post 101e penetrating through the movable platen 101a, a guide sleeve 101f penetrating through the fixed platen 101b, a fixed die seat plate 101g disposed on an upper side of the fixed platen 101b, a sprue bush 101h penetrating through centers of the fixed platen 101b, the fixed die insert 101d and the fixed die seat plate 101g, a movable die pad 101j disposed on a lower side of the movable platen 101a, a set of cushion blocks 101k disposed on a lower side of the movable die pad 101j, a movable die plate 101l disposed on a lower side of the cushion blocks 101k, a cooling water channel 101m penetrating through the movable die insert 101c and the fixed die insert 101d, and a positioning ring 101n disposed on an upper end of the sprue bush 101 h.

Further, the movable die plate 101a is fixedly connected with the movable die insert 101 c; the fixed template 101b is fixedly connected with the fixed die insert 101 d; the guide post 101e is movably connected with the guide sleeve 101 f; the fixed template 101b is fixedly connected with the fixed template 101 g; the sprue bush 101h is fixedly connected with the fixed die plate 101b, the fixed die insert 101d and the fixed die seat plate 101g respectively; the movable template 101a, the movable mould cushion plate 101j, the cushion block 101k and the movable mould base plate 101l are fixedly connected in sequence; the positioning ring 101n is fixedly connected with the fixed mold seat plate 101 g.

Further, the ejector assembly 102 includes a push plate 102a disposed on the upper side of the movable die holder plate 101l, a push rod fixing plate 102b disposed on the upper side of the push plate 102a, a set of push rods 102c disposed on the upper side of the push rod fixing plate 102b, a pull rod 102d disposed at the center of the push rod fixing plate 102b, reset rods 102e disposed on the upper side of the push rod fixing plate 102b in an array manner, reset springs 102f disposed on the outer circumference of the reset rods 102e, and a countersunk hole 102g penetrating through the center of the movable die holder plate 101 l.

The movable die holder plate 101l is movably connected with the push plate 102 a; the push plate 102a is fixedly connected with the push rod fixing plate 102 b; the push rod fixing plate 102b is fixedly connected with the push rod 102c, the pull rod 102d and the reset rod 102e respectively; the return spring 102f is connected to the movable platen 101a and the push rod fixing plate 102b at both ends thereof.

Further, the core back assembly 103 includes a slider 103a disposed on one side of the movable mold insert 101c and the fixed mold insert 101d, a diagonal guide post 103b disposed on an upper diagonal side of the slider 103a, a pressing block 103c disposed on an outer end of the fixed mold plate 101b, and a side core 103d disposed on the other side of the movable mold insert 101c and the fixed mold insert 101 d.

The sliding block 103a is movably connected with the inclined guide post 103 b; the inclined guide post 103b is fixedly connected with the fixed template 101 b; the pressing block 103c is fixedly connected with the fixed platen 101 b.

Further, the core pulling assembly 103 further comprises a limiting device 103e arranged on the outer side of the movable template 101a and a limiting screw 103f arranged on the outer edge of the movable template 101 a;

the limiting device 103e is fixedly connected with the slider 103 a.

The core pulling assembly 103, the side core 103d, the movable die insert 101c and the fixed die insert 101d enclose a cavity structure for casting the parts; the push rod 102c is opposite to a plurality of ejection through holes at corresponding positions on the movable mould plate 101a and the movable mould insert 101 c; the material pulling rod 102d is opposite to a plurality of material pulling through holes at corresponding positions on the movable die plate 101a and the movable die insert 101 c; the upper end of the reset rod 102e is movably inserted into the guide through holes on the movable die plate 101a and the movable die cushion plate 101 j; the end face of the sliding block 103a is provided with a convex strip which is inserted into a forming cavity between the movable die insert 101c and the fixed die insert 101 d; the lower side of the inner end of the pressing block 103c is provided with a locking slope which is abutted against the slope of the outer end of the sliding block 103a with the same angle.

Preferably, the mould is directed to an electrical connection housing M for packaging the exterior housing parts of an electrical product, having the dual functions of load bearing and maintenance. The molding accuracy and surface quality of the electrical connection housing M are required to be high, and the surface is required to be smooth, free of weld marks and free of bubbles. The density of the ABS material is 1.02-1.05 g/cm < 3 >, the molding shrinkage is 0.4% -0.7%, the tensile strength is 30-50 MPa, and the bending strength is 41-76 MPa. The PVT characteristic curve of the ABS resin has higher impact resistance, good toughness, wear resistance and electrical property, and also has excellent processability, stable size of the produced product, high surface hardness and other excellent properties, and has wide application in the fields of electrical engineering, mechanical industry, automobile industry, articles for daily use and the like.

In conclusion, the electrical connection shell M is formed by selecting an ABS thermoplastic material, the strength of a product formed by the ABS material is high, and the forming precision and the surface quality are also ensured.

The basic size of the electric appliance wiring shell M part is 65.7mm x 20.0mm x 17.4mm, and the three-dimensional structure of the electric appliance wiring shell M part is shown in the drawing. The maximum wall thickness of the part is 5.83mm and the average wall thickness is 1.23mm.

The precision grade of the plastic part is MT5; in order to ensure smooth demoulding of the molded electric appliance wiring shell M, the demoulding slope of the core is set to be 31', and the demoulding slope of the cavity is set to be 1 DEG 20'.

In addition, the plastic part of the wiring shell M of the electrical appliance comprises a plurality of molding characteristics such as a boss, a side hole, a groove and the like. As shown in A, B of the drawing, the position A is an irregular side bulge with the length of 2.8mm and the width of 2mm, the position B is a rectangular side hole with the length of 17.6mm and the width of 13.8mm, and the plastic product is difficult to obtain by directly separating the mold at A, B, so that the molding assembly 101 and the core pulling assembly 103 are required to mold the boss and the side hole.

Therefore, the model of the injection molding machine needs to be determined, and the injection is performed by adopting one mold and two cavities in combination with the shape, the size and the production requirements of the parts of the wiring shell M of the electric appliance. The density of the plastic part is 1.02-1.05 g/cm < 3 >, and the design is selected to be 1.05g/cm < 3 >; the volume of the M piece of the wiring shell of the electrical appliance is 5.09cm3 and the mass is 5.34g measured by UG12.0 software; the volume of the condensing material of the pouring system is about 0.6 times of the volume of the plastic part, so that the total volume of the plastic required by one injection of the die is about 13.23cm < 3 >, and the total mass is 13.90g.

According to calculation, the total volume of the solidifying material amount of the plastic part of the electric appliance wiring shell M and the casting system is 13.23cm < 3 >, and according to the principle that the actual injection amount is about 20% -80% of the rated injection amount, an injection machine of SZ-40/25 is selected, the rated injection amount is 40cm < 3 >, and the injection molding requirement is met.

Preferably, the part is a shell part, the surface is required to be smooth, no trace is required, and the mass production is required, so that the structure of the die is required to be simple, a single parting surface injection die is selected, and one die and two cavities are adopted for injection.

The electric appliance wiring shell M is injected by adopting a mold and two cavities, and the runner is symmetrically designed in an I-shaped unbalanced mode. The cavity has compact structural arrangement, the design of the sub-runners is simpler, and meanwhile, the layout of a cooling system is also facilitated.

The main runner is usually arranged in the center of the mold, and the molten material injected from the nozzle of the injection molding machine is guided into the sub-runner or the cavity. In order to facilitate the condensed material to be pulled out in time, the main flow channel is designed into a conical shape, the conical angle is usually 2-4 degrees, and the roughness Ra of the inner wall surface is 0.63 mu m. In addition, in order to prevent leakage of the wiring shell plastic part in the injection molding process, tightness between the initial end of the main runner and the nozzle of the injection molding machine is ensured, so that the joint of the initial end of the main runner and the nozzle of the injection molding machine is designed into a spherical pit with the radius of 11mm, the diameter of the small end of the pit of 4.5mm and the depth of the pit of 3-5mm.

In the process of filling molten plastic, in order to avoid pressure loss and plastic loss, improvement is generally performed by shortening the length of the main flow channel. The length of the main runner is controlled within 60mm generally, and the length of the main runner is 54mm. In addition, in the working process of the mould, the main runner is repeatedly contacted and collided with the high-temperature melting material and the injection nozzle, so the main runner is designed into a detachable main runner bushing, and the main runner bushing is made of T8 steel.

The cross section of the plastic part runner is semicircular, and is only arranged on one side of the movable mould, and the length L of the runner is 8mm.

In order to regulate and control the speed of molten plastic and prevent molten material from flowing backwards, the side gate is adopted as the gate, the depth is 0.5mm, the width is 1.5mm and the length is 1.5mm.

In order to prevent the condensed material in front of the melt from entering the die cavity of the die and affecting the surface quality of the plastic product, a cold material cavity is required to be designed. The condensation cave is arranged on the movable mould plate opposite to the main runner or at the tail end of the sub-runner. The pushing mechanism adopted in the design is the push rod 102c, so that a reverse-cone-shaped cold material hole is adopted, namely, when the die is opened, the reverse cone can be utilized to act as a pulling function, and then the plastic part is forcedly pushed out through the push rod 102 c.

Preferably, for shaping the outline and the inner surface of the shell product, the female die is designed into the structure form of an integral female die, and the male die is designed into the structure form of an integral male die. The female die and the male die are designed into an integral structure, so that die materials can be saved, the die design cost can be reduced, and the mechanical processing is convenient.

As can be seen from the accompanying drawings, the plastic part A of the wiring shell M of the electrical appliance is provided with an irregular lateral bulge with the length of 2.8mm and the width of 2mm, the B is provided with a rectangular lateral hole with the length of 17.6mm and the width of 13.8mm, and the core pulling assembly 103 formed by the inclined guide posts 103B is adopted for molding due to the fact that the depths of the lateral bulge and the lateral hole are smaller; compared with other core pulling mechanisms, the intelligent core pulling mechanism has the advantages of being intelligent, low in cost, high in production efficiency and the like.

The inclined guide post 103b and the fixed template are in transition fit by adopting H7/m6, and a bilateral gap of 0.5-1 mm is kept between the inclined guide post 103b and the inclined hole of the sliding block 103 a. The inclined guide post 103b is made of a material T8A, and is subjected to quenching treatment, wherein the hardness is 54-58 HRC; the material of the sliding block 103a is made of high-quality tool steel T8A, and the quenching hardness is 40-45 HRC; the compaction block 103c is made of No. 45 steel, and the quenching hardness is 43-48 HRC; the material of the guide chute is wear-resistant material or copper slide block, and the quenching hardness is 50-55 HRC.

Preferably, according to the shape and the structural characteristics of the electrical connection shell M, in order to ensure that the molded part of the electrical connection shell M is smoothly demolded after being molded, a circular push rod is adopted to push out the molded part in sequence. The diameter of the push rod is 6mm, and 4 push rods 102c are uniformly arranged at the reasonable positions of each plastic part; the push rod 102c is made of 65Mn, and the quenching hardness is 50-55 HRC. In order to ensure that the shell plastic part can be completely separated from the movable die, the push-out distance is 67.9mm.

In order to ensure that the next cycle of injection molding is smoothly carried out, after the ejection action of the electric switch shell part is completed, the demolding push-out mechanism needs to return to the original position, so that a reset mechanism needs to be designed to reset the mold. The reset rod 102e and the reset spring 102f are adopted to reset the die of the electrical appliance wiring shell M.

In order to ensure that the force transmission of the pushing mechanism is stable in the pushing process of the electrical appliance wiring shell M, and avoid deformation or breakage of the push rod, the guide post 101e and the guide sleeve 101f are adopted to realize the guiding and positioning of the pushing mechanism.

In the process of forming the electric appliance wiring shell M, the dimensional accuracy, the surface quality and the internal quality of the electric appliance wiring shell M are affected by the temperature of the die, so that a cooling system is required to be designed for adjusting the temperature of a plastic part of the shell. The cooling water channel 101m adopts a straight-through structure, the diameter of a water pipe is 8mm, the volume flow of cooling water is 5.714 multiplied by 10 < -6 > (m 3/min), and the total heat transfer area of water holes is 0.0733m < 2 >. In addition, in order to prevent water leakage, a method of inserting a copper pipe into a water pipe may be adopted.

Preferably, the molded part adopts a single parting plane and adopts a basic A2 die. The size of the template is 350mm multiplied by 300mm according to the size of the formed part, wherein the thickness of the plate A is 46mm, the thickness of the plate B is 46mm, and the thickness of the cushion block C is 66mm.

When the injection molding machine is used, under the drive of the injection machine, the movable mold is driven by the telescopic unit 200 and is closed with the fixed mold, molten plastic is injected through the screw first, then passes through the positioning ring 101n and the sprue bush 101h, and finally reaches the cavity until the cavity is full; the molten plastic is then subjected to a pressure maintaining treatment to ensure that it fills uniformly. After the pressure maintaining is finished, in order to prevent the shell plastic part from buckling and deforming, cooling water sufficiently cools the plastic part through the cooling water channel 101 m. The plastic part is subjected to pressure maintaining, cooling and shaping, and then the mold is opened, at the moment, each sliding block 103a slides along with the movement of each inclined guide pillar 103b, and a core pulling mechanism in the core pulling assembly 103 slowly slides backwards along the guide chute, so that core pulling of rectangular holes and side protrusions on the outer side of the plastic part is realized. During ejection, the push plate 102a drives the push rod 102c to eject the plastic part and the condensing material of the pouring system. Finally, the reset rod 102e and the reset spring 102f are utilized to realize the die reset, and one die closing period is completed, so that the next injection can be performed.

In combination, the shell mold has the advantages of simple structure, high molding precision and surface quality, short production period, high efficiency, reasonable parameter setting and difficult generation of buckling deformation

Example 2

Referring to fig. 1 to 11, a second embodiment of the present invention is different from the first embodiment in that: the housing 201 further includes a liquid supply chamber 201a and a liquid storage chamber 201b provided inside thereof, and a partition plate 201c provided between the liquid supply chamber 201a and the liquid storage chamber 201 b;

the liquid supply chamber 201a comprises a lifting chamber 201a-1 and a containing chamber 201a-2 arranged in the liquid supply chamber, a supporting piston 201a-3 arranged in the lifting chamber 201a-1, and a supporting platform 201a-4 arranged on the top of the supporting piston 201 a-3;

the liquid storage cavity 201b comprises an adjusting channel 201b-1 which is arranged on the side wall of the shell 201 in a penetrating way, an adjusting piston 201b-2 which is arranged in the adjusting channel 201b-1, and an adjusting spring 201b-3 which is arranged on one side of the adjusting piston 201 b-2;

the partition 201c includes a communication port 201c-1 penetrating the surface thereof;

the supporting piston 201a-3 is movably connected with the lifting cavity 201 a-1; the supporting piston 201a-3 is fixedly connected with the supporting platform 201a-4; the adjusting channel 201b-1 is movably connected with the adjusting piston 201 b-2; the adjusting spring 201b-3 is fixedly connected with the adjusting piston 201b-2 and the inner wall of the housing 201, respectively.

Further, the fluid supply assembly 202 includes a housing 202a, an end cap 202b disposed on one side of the housing 202a, a movable sleeve 202c penetrating through the middle of the end cap 202b, and an accompanying piston 202d and a pressure relief assembly 202e disposed inside the housing 202 a;

the housing 202a is fixedly connected with the end cover 202 b; the movable sleeve 202c is movably connected with the end cover 202 b; the companion plunger 202d is keyed to the moveable sleeve 202 c; the companion piston 202d is movably coupled to the housing 202 a.

Further, the housing 202a includes a pair of first liquid supply holes 202a-1 provided at an upper side thereof, a pair of second liquid supply holes 202a-2 provided at a lower side of the housing 202a, tapered ports 202a-3 provided through the first liquid supply holes 202a-1 and the second liquid supply holes 202a-2, first and second pistons 202a-4 and 202a-5 provided inside the first liquid supply holes 202a-1, and third and fourth pistons 202a-6 and 202a-7 provided inside the second liquid supply holes 202 a-2;

the companion piston 202d includes a shaft 202d-1, a coupling head 202d-2 provided at one end of the shaft 202d-1, a piston 202d-3 provided at the other end of the shaft 202d-1, and a cam 202d-4 provided at the other end of the piston 202 d-3;

the second piston 202a-5 includes a boss 202a-51 disposed at a bottom end thereof;

the third piston 202a-6 includes a connecting ring 202a-61 disposed at a top end thereof;

The second liquid supply hole 202a-2 is fixedly connected with the communication port 201 c-1; the heads of the first, second, third and fourth pistons 202a-4, 202a-5, 202a-6, 202a-7 mate with the tapered mouth 202 a-3; the third piston 202a-6 is movably coupled to the coupling ring 202 a-61.

Further, pressure relief assembly 202e includes a bracket 202e-1, a companion rod 202e-2 disposed at the bottom of bracket 202e-1, and traction springs 202e-3 disposed on the upper and lower sides of bracket 202 e-1;

accompanying bar 202e-2 includes a first limit stop 202e-21 disposed on one side thereof;

bracket 202e-1 includes a second limit stop 202e-11 disposed at one end thereof;

the bracket 202e-1 is hinged with the housing 202 a; accompanying bar 202e-2 is hinged to bracket 202 e-1; traction spring 202e-3 is fixedly coupled to the inner wall of housing 202a and bracket 202e-1, respectively.

Further, the transmission assembly 203 includes a knob 203a provided on the shaft 202d-1, a transmission arm 203b provided on the outer circumference of the coupling head 202d-2, a motor 203c provided on the upper end of the housing 201, and a transmission disc 203d provided on the shaft end of the motor 203 c;

the transmission arm 203b comprises a limit groove 203b-1 arranged at one end of the transmission arm;

the driving disk 203d comprises a driving column 203d-1 arranged at the outer edge thereof;

Knob 203a is keyed to shaft 202 d-1; knob 203a is movably connected with housing 201; the transmission arm 203e is movably connected with the connector 202 d-2; the transmission disc 203d is fixedly connected with the shaft end of the motor 203 c; the limiting groove 203b-1 is movably connected with the transmission column 203 d-1.

When all the piston members perform relative movement, the piston members have a corresponding limit structure for limiting the stroke of each piston member, and the telescopic unit 200 is driven by the liquid. The partition 201c is used for separating the internal cavity of the shell 201, two communication ports 201c-1 are arranged in a penetrating manner and are in sealing connection with the second liquid supply hole 202a-2, the lifting cavity 201a-1 in the liquid supply cavity 201a can accommodate the supporting piston 201a-3, the supporting platform 201a-4 at the top of the supporting piston 201a-3 can be used for connecting the movable mould part of the injection mould, the accommodating cavity 201a-2 and the lifting cavity 201a-1 are communicated with each other and are mainly used for accommodating the liquid supply assembly 202, the adjusting channel 201b-1 capable of accommodating the adjusting piston 201b-2 is arranged in the liquid storage cavity 201b, the adjusting channel 201b-1 is communicated with the outside and is used as a travel channel of the adjusting piston 201b-2, the adjusting piston 201b-2 is used for separating external air from liquid in the liquid storage cavity 201b, and the adjusting spring 201b-3 is used for resetting the adjusting piston 201b-2 due to the fact that the liquid storage cavity 201b is sealed and can adaptively move along with the change of the liquid in the liquid storage cavity 201 b.

Preferably, the housing 202a of the liquid supply assembly 202 is entirely cylindrical, one end of the housing is closed, the other end of the housing is fixedly connected with the end cover 202b, a movable sleeve 202c is arranged in the middle of the end cover in a penetrating manner, the movable sleeve 202c is internally penetrated and connected with the accompanying piston 202d in a key manner, the outer part of the movable sleeve is movably connected with the end cover 202b, along with the rotation of the accompanying piston 202d, the piston 202d-3 at one end of the accompanying piston 202d reciprocates in the housing 202a, the other end of the piston 202d-3 is provided with a cam 202d-4, the two are fixedly connected with each other, the cam 202d-4 moves along with the rotation of the accompanying piston 202d, the housing 202a is respectively provided with a first liquid supply hole 202a-1 and a second liquid supply hole 202a-2, two upper and lower parts are respectively, four liquid supply holes are respectively arranged, the four liquid supply holes are consistent in structure, and are respectively closely matched with the first piston 202a-4, the second piston 202a-5, the third piston 202a-6 and the fourth piston 202a-7, and provides a limited travel path for four pistons, four liquid supply holes are communicated and fixedly connected with four conical ports 202a-3 respectively, the four conical ports 202a-3 are opened upwards, the first piston 202a-4 and the fourth piston 202a-7 are in consistent structure, a connecting ring 202a-61 on the third piston 202a-6 is movably connected with an accompanying rod 202e-2, a bracket 202e-1 is connected with the other end of the accompanying rod 202e-2 through a hinge, the bracket is connected with a shell 202a through the hinge, a first limit partition 202e-21 and a second limit partition 202e-11 are respectively arranged at the hinge position of the bracket 202e-1 and the accompanying rod 202e-2, the movement travel of the accompanying rod 202e-2 is limited, the moving travel of the accompanying rod 202e-2 is limited, the connecting ring can only move upwards at a certain angle and can not move downwards, traction springs 202e-3 on the upper and lower sides of the support 202e-1 play a role in resetting and traction of the support 202 e-1.

Preferably, the transmission assembly 203 transmits power from the motor 203c, the connector 202d-2 is movably connected with the transmission arm 203e, which is because the rotation of the accompanying piston 202d is not affected while the power from the motor 203c is received, the knob 203a is used for controlling the rotation of the accompanying piston 202d, the knob 203a is fixedly connected with the movable sleeve 202c, the transmission arm 203b is in a special-shaped structure, which can transmit power from a driving member to a driven member with a large difference in spatial position, the transmission column 203d-1 is movably connected with the limit groove 203b-1, and the limit groove 203b-1 is in a straight groove shape, so that the transmission disc 203d drives the transmission arm 203e to reciprocate, and the transmission arm 203e drives the accompanying piston 202d to reciprocate.

In use, the supporting platform 201a-4 is fixedly connected with the movable mould of the injection mould, the motor 203c is started, the driving arm 203e drives the accompanying piston 202d to reciprocate, at the moment, the pressure release assembly 202e is in a natural state and is not in contact with any component, the first piston 202a-4, the second piston 202a-5, the third piston 202a-6 and the fourth piston 202a-7 are tightly matched with the liquid supply hole, when the accompanying piston 202d stretches outwards, the first piston 202a-4 and the third piston 202a-6 are simultaneously opened, liquid in the liquid storage cavity 201b is sucked into the right side cavity of the accompanying piston 202d, liquid in the left side cavity of the accompanying piston 202d is pressed into the liquid supply cavity 201a, the regulating piston 201b-2 moves inwards under the influence of air pressure, the regulating spring 201b-3 is compressed, the supporting piston 201a-3 is forced to move upwards due to the arrangement of the conical opening 202a-3, when the first piston 202a-4 and the third piston 202a-6 are simultaneously closed and the second piston 202a-5 and the fourth piston 202a-7 are simultaneously opened when the liquid cannot flow back and the accompanying piston 202d is contracted inward, the liquid in the liquid storage chamber 201b is sucked into the left chamber of the accompanying piston 202d and the liquid in the right chamber of the accompanying piston 202d is pressed into the liquid supply chamber 201a, the regulating piston 201b-2 is moved inward by the influence of the air pressure, the regulating spring 201b-3 is compressed, the supporting piston 201a-3 is forced to move upward, the liquid cannot flow back due to the arrangement of the tapered opening 202a-3, the liquid continuously enters the liquid supply chamber 201a from the liquid storage chamber 201b along with the reciprocating movement of the piston 202d, so that the function of supporting the top starting mode of the piston 201a-3 is achieved, and it should be noted that the third piston 202a-6 is provided with a hinge, can work normally without affecting the second piston 202a-5 through the bracket 202 e-1; when the supporting piston 201a-3 moves downwards, namely the movable mould is put down, the accompanying piston 202d needs to be placed at the innermost side, then the knob 203a rotates the accompanying piston 202d, so as to drive the cam 202d-4 to rotate, at the moment, the traction spring 202e-3 obtains potential energy, the tip of the cam 202d-4 jacks up the bracket 202e-1, the bracket 202e-1 lifts up the boss 202a-51 at the bottom end of the second piston 202a-5, so that the liquid supply holes of the second piston 202a-5 are communicated, at the moment, due to the functions of the first limit partition 202e-21 and the second limit partition 202e-11, the bracket 202e-1 pulls up the accompanying rod 202e-2, the accompanying rod 202e-2 pulls up the third piston 202a-6 through the connecting ring 202a-61, at the moment, the liquid supply holes of the third piston 202a-6 are communicated, namely, the liquid supply cavity 201a, the inner cavity of the liquid supply assembly 202 and the liquid storage cavity 201b are communicated, the compressed adjusting spring 201b-3 drives the adjusting piston 201b-2 to move outwards, liquid is forced to rotate into the liquid storage cavity 201b from the liquid supply cavity 201a, at the moment, the supporting piston 201a-3 moves downwards, finally the knob 203a rotates, the traction spring 202e-3 resets the support 202e-1, the second piston 202a-5 and the third piston 202a-6 are reset, at the moment, a lifting period is completed, note that the tip of the cam 202d-4 can be obliquely arranged when pressure release is not needed, an arrow indicates on the shell 101, the arrow indicates two nodes where the tip of the cam 202d-4 can collide, and normal operation of the pressure release assembly 202e, the second piston 202a-5 and the third piston 202a-6 is prevented from being influenced.

Preferably, when the telescopic unit 200 needs to perform the periodic telescopic movement, a servo motor may be additionally arranged to be in transmission fit with the knob 203a, for example: the position of the servo motor is freely selected according to actual conditions to realize periodic operation of the pressure relief assembly 202e by belt transmission, and the motor 203c needs to be periodically started and stopped.

In addition, the telescopic unit can play a role in temporarily supporting the die and can also be used for temporarily pushing the movable die.

It is important to note that the construction and arrangement of the application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present application. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present applications. Therefore, the application is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in order to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the invention, or those not associated with practicing the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.

Claims

1. An electric appliance wiring casing injection mold which is characterized in that: comprising the steps of (a) a step of,

A mold unit (100) comprising a molding assembly (101), a material ejection assembly (102) and a core pulling assembly (103) which are arranged inside the molding assembly (101);

the telescopic unit (200) comprises a shell (201), a liquid supply assembly (202) arranged inside the shell (201), and a transmission assembly (203) arranged outside the shell (201);

the die unit (100) is fixedly connected with the telescopic unit (200);

the shell (201) comprises a liquid supply cavity (201 a) and a liquid storage cavity (201 b) which are arranged in the shell, and a baffle plate (201 c) which is arranged between the liquid supply cavity (201 a) and the liquid storage cavity (201 b);

the liquid supply cavity (201 a) comprises a lifting cavity (201 a-1) and a containing cavity (201 a-2) which are arranged in the liquid supply cavity, a supporting piston (201 a-3) which is arranged in the lifting cavity (201 a-1), and a supporting platform (201 a-4) which is arranged at the top of the supporting piston (201 a-3);

the liquid storage cavity (201 b) comprises an adjusting channel (201 b-1) which is arranged on the side wall of the shell (201) in a penetrating way, an adjusting piston (201 b-2) which is arranged in the adjusting channel (201 b-1), and an adjusting spring (201 b-3) which is arranged on one side of the adjusting piston (201 b-2);

The separator (201 c) comprises a communication port (201 c-1) penetrating through the surface thereof;

the supporting piston (201 a-3) is movably connected with the lifting cavity (201 a-1); the supporting piston (201 a-3) is fixedly connected with the supporting platform (201 a-4); the adjusting channel (201 b-1) is movably connected with the adjusting piston (201 b-2); the adjusting spring (201 b-3) is fixedly connected with the adjusting piston (201 b-2) and the inner wall of the shell (201) respectively;

the liquid supply assembly (202) comprises a shell (202 a), an end cover (202 b) arranged on one side of the shell (202 a), a movable sleeve (202 c) penetrating through the middle of the end cover (202 b), an accompanying piston (202 d) and a pressure relief assembly (202 e) which are arranged in the shell (202 a);

the shell (202 a) is fixedly connected with the end cover (202 b); the movable sleeve (202 c) is movably connected with the end cover (202 b); the accompanying piston (202 d) is in key connection with the movable sleeve (202 c); the accompanying piston (202 d) is movably connected with the shell (202 a);

the housing (202 a) comprises a pair of first liquid supply holes (202 a-1) arranged on the upper side of the housing, a pair of second liquid supply holes (202 a-2) arranged on the lower side of the housing (202 a), conical ports (202 a-3) penetrating through the first liquid supply holes (202 a-1) and the second liquid supply holes (202 a-2), a first piston (202 a-4) and a second piston (202 a-5) arranged inside the first liquid supply holes (202 a-1), and a third piston (202 a-6) and a fourth piston (202 a-7) arranged inside the second liquid supply holes (202 a-2);

The accompanying piston (202 d) comprises a rod body (202 d-1), a connector (202 d-2) arranged at one end of the rod body (202 d-1), a piston (202 d-3) arranged at the other end of the rod body (202 d-1), and a cam (202 d-4) arranged at the other end of the piston (202 d-3);

the second piston (202 a-5) includes a protrusion (202 a-51) disposed at a bottom end thereof;

the third piston (202 a-6) comprises a connecting ring (202 a-61) arranged at the top end thereof;

the second liquid supply hole (202 a-2) is fixedly connected with the communication port (201 c-1); the heads of the first piston (202 a-4), the second piston (202 a-5), the third piston (202 a-6) and the fourth piston (202 a-7) are matched with the conical mouth (202 a-3);

the pressure relief assembly (202 e) comprises a bracket (202 e-1), an accompanying rod (202 e-2) arranged at the bottom of the bracket (202 e-1), and traction springs (202 e-3) arranged on the upper side and the lower side of the bracket (202 e-1);

the accompanying bar (202 e-2) comprises a first limit stop (202 e-21) arranged on one side thereof;

the bracket (202 e-1) comprises a second limit partition (202 e-11) arranged at one end of the bracket;

The bracket (202 e-1) is connected with the shell (202 a) through a hinge; the accompanying rod (202 e-2) is connected with the bracket (202 e-1) through a hinge; the traction spring (202 e-3) is fixedly connected with the inner wall of the shell (202 a) and the bracket (202 e-1) respectively.

2. The electrical connection housing injection mold of claim 1, wherein:

the molding assembly (101) comprises a movable template (101 a), a fixed template (101 b), a movable die insert (101 c) arranged on the upper side of the movable template (101 a), a movable die pad (101 j) arranged on the lower side of the movable template (101 b), a guide post (101 e) penetrating through the periphery of the movable template (101 a), a guide sleeve (101 f) penetrating through the periphery of the fixed template (101 b), a fixed die seat plate (101 g) arranged on the upper side of the fixed template (101 b), a sprue bush (101 h) penetrating through the centers of the fixed template (101 b), the fixed die insert (101 d) and the fixed die seat plate (101 g), a movable die pad (101 j) arranged on the lower side of the movable die pad (101 a), a group of cushion blocks (101 k) arranged on the lower side of the movable die seat plate (101 l), a sprue bush (101 c) penetrating through the movable die insert (101 c) and the fixed die insert (101 d), and a positioning water channel (101 n) arranged on the inner side of the sprue bush (101 n);

The movable mould plate (101 a) is fixedly connected with the movable mould insert (101 c); the fixed die plate (101 b) is fixedly connected with the fixed die insert (101 d); the guide post (101 e) is movably connected with the guide sleeve (101 f); the fixed die plate (101 b) is fixedly connected with the fixed die seat plate (101 g); the sprue bush (101 h) is fixedly connected with the fixed die plate (101 b), the fixed die insert (101 d) and the fixed die seat plate (101 g) respectively; the movable die plate (101 a), the movable die base plate (101 j), the cushion block (101 k) and the movable die base plate (101 l) are sequentially and fixedly connected; the positioning ring (101 n) is fixedly connected with the fixed die seat plate (101 g).

3. The electrical connection housing injection mold of claim 2, wherein:

the ejector assembly (102) comprises a push plate (102 a) arranged on the upper side of the movable die seat plate (101 l), a push rod fixing plate (102 b) arranged on the upper side of the push plate (102 a), a group of push rods (102 c) arranged on the upper side of the push rod fixing plate (102 b), a pull rod (102 d) arranged in the center of the push rod fixing plate (102 b), reset rods (102 e) arranged on the upper side of the push rod fixing plate (102 b) in an array manner, reset springs (102 f) arranged on the outer circumference of the reset rods (102 e) and countersunk holes (102 g) penetrating through the center of the movable die seat plate (101 l);

The movable die seat plate (101 l) is movably connected with the push plate (102 a); the push plate (102 a) is fixedly connected with the push rod fixing plate (102 b); the push rod fixing plate (102 b) is fixedly connected with the push rod (102 c), the pull rod (102 d) and the reset rod (102 e) respectively; the two ends of the return spring (102 f) are respectively connected with the movable template (101 a) and the push rod fixing plate (102 b).

4. An electrical connection housing injection mold according to claim 3, wherein:

the core pulling assembly (103) comprises a sliding block (103 a) arranged on the side edges of the movable die insert (101 c) and the fixed die insert (101 d), an inclined guide column (103 b) arranged on the upper inclined side of the sliding block (103 a), a pressing block (103 c) arranged on the outer end of the fixed die plate (101 b), and a side core (103 d) arranged on the other side of the movable die insert (101 c) and the fixed die insert (101 d);

the sliding block (103 a) is movably connected with the inclined guide pillar (103 b); the inclined guide post (103 b) is fixedly connected with the fixed template (101 b); the pressing block (103 c) is fixedly connected with the fixed template (101 b).

5. The electrical connection housing injection mold of claim 4, wherein:

The core pulling assembly (103) further comprises a limiting device (103 e) arranged on the outer side of the movable template (101 a), and a limiting screw (103 f) arranged on the outer edge of the movable template (101 a);

the limiting device (103 e) is fixedly connected with the sliding block (103 a).

6. The electrical connection housing injection mold of claim 5, wherein:

the transmission assembly (203) comprises a knob (203 a) arranged on the outer circumference of the rod body (202 d-1), a transmission arm (203 b) arranged on the outer circumference of the connector (202 d-2), a motor (203 c) arranged at the upper end of the shell (201), and a transmission disc (203 d) arranged at the shaft end of the motor (203 c);

the transmission arm (203 b) comprises a limit groove (203 b-1) arranged at one end of the transmission arm;

the transmission disc (203 d) comprises a transmission column (203 d-1) arranged at the outer edge of the transmission column;

the knob (203 a) is in key connection with the shaft (202 d-1); the knob (203 a) is movably connected with the shell (201); the transmission arm (203 b) is movably connected with the connector (202 d-2); the transmission disc (203 d) is fixedly connected with the shaft end of the motor (203 c); the limiting groove (203 b-1) is movably connected with the transmission column (203 d-1).