CN210679547U

CN210679547U - Wiper runner excision mould

Info

Publication number: CN210679547U
Application number: CN201921163977.XU
Authority: CN
Inventors: 杨朝晖; 吴为水; 黄向东; 刘煜
Original assignee: Changsha Boda Science And Engineering Co Ltd
Current assignee: Changsha Boda Science And Engineering Co Ltd
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2020-06-05
Anticipated expiration: 2029-07-24

Abstract

The utility model discloses a wiper runner excision mould, it includes the bottom plate, and its upper end is provided with circular transition seat, supporting shoe, lever cylinder and briquetting, and wherein, the upper end of circular transition seat is coaxial to be provided with the position sleeve, and the quantity of lever cylinder is two at least, and the briquetting is installed on the lever cylinder, and the supporting shoe setting is under the briquetting, and the lever cylinder is around the center pin ring array of circular transition seat. The utility model aims at providing a wiper runner excision mould has replaced traditional manual operation, can realize the automatic excision of runner in the mould, has improved production efficiency, has satisfied the demand of scale production.

Description

Wiper runner excision mould

Technical Field

The invention relates to a cutting die for a pouring gate of a windscreen wiper.

Background

The die-casting forming process mainly comprises 6 stages of die assembly, filling, cooling, die opening, demoulding and the like. These 6 stages directly determine the quality of the product being formed and these 6 stages are a complete continuous process.

First, filling stage

Filling is the first step in the overall die casting cycle, from the time the die is closed to start die casting until the die cavity is approximately 95% filled. Theoretically, the shorter the filling time, the higher the molding efficiency; however, in actual production, the molding time (or the die casting speed) is limited by many conditions.

And (4) high-speed filling. The shear rate is high during high-speed filling, and the viscosity of the plastic is reduced due to the shear thinning effect, so that the overall flow resistance is reduced; localized viscous heating effects also thin the thickness of the cured layer. Thus, in the flow control phase, the filling behavior tends to depend on the volume size to be filled. That is, during the flow control phase, the shear-thinning effect of the melt tends to be large due to the high-speed filling, while the cooling effect of the thin wall is not significant, so that the effect of the velocity dominates the upwind.

And (4) filling at a low speed. When the heat conduction controls low-speed filling, the shear rate is low, the local viscosity is high, and the flow resistance is high. Because the hot plastic is supplemented at a slow speed and flows slowly, the heat conduction effect is obvious, and the heat is rapidly taken away by the cold die wall. With a smaller amount of viscous heating, the solidified layer is thicker, which further increases the flow resistance where the wall is thinner.

Due to the fountain flow, the plastic polymer chains in front of the flow wave are aligned to the almost parallel flow front. Therefore, when the two plastic melt adhesives are intersected, the polymer chains of the contact surfaces are parallel to each other; in addition, the two strands of molten glue have different properties (different residence time in a die cavity, different temperature and pressure), so that the structural strength of a molten glue intersection area on a micro scale is poor. When the parts are placed at a proper angle under light and observed by naked eyes, the generation of obvious bonding lines can be found, and the mechanism is the formation mechanism of the welding marks. The weld marks not only affect the appearance of the plastic part, but also loose microstructure and easy to cause stress concentration, so that the strength of the part is reduced and the part is broken.

Generally, the weld mark strength at which welding occurs in a high temperature region is better. Because the mobility of the polymer chains is relatively good under the high-temperature condition, the polymer chains can penetrate and wind each other, and in addition, the temperatures of two melts in a high-temperature area are relatively close, the thermal properties of the melts are almost the same, and the strength of a welding area is increased; on the contrary, in the low temperature region, the welding strength is poor.

Second, pressure maintaining stage

The effect of the dwell phase is to continuously apply pressure to compact the melt and increase the density of the plastic (densification) to compensate for the shrinkage behaviour of the plastic. During the dwell process, the back pressure is high because the mold cavity is already filled with plastic. During the pressure-maintaining compaction process, the screw of the die-casting machine can only slightly move forward slowly, the flowing speed of the plastic is slow, and the flowing is called pressure-maintaining flowing. In the pressure maintaining stage, the cooling and solidification of the plastic mold wall is accelerated, and the viscosity of the melt is increased quickly, so that the resistance in the mold cavity is high. In the later stage of pressure maintaining, the material density is continuously increased, the plastic part is gradually formed, the pressure maintaining stage is continued until the sprue is solidified and sealed, and the pressure of the mold cavity in the pressure maintaining stage reaches the highest value.

During the dwell phase, the plastic exhibits partially compressible properties due to the relatively high pressure. In the area with higher pressure, the plastic is more compact and has higher density; in the lower pressure areas, the plastic is more porous and less dense, thus causing the density distribution to change with location and time. The plastic flow rate is extremely low in the pressure maintaining process, and the flow does not play a leading role any more; pressure is a major factor affecting the pressure holding process. During the holding process, the plastic already fills the mold cavity, and the gradually solidified melt serves as a medium for transmitting pressure. The pressure in the mold cavity is transmitted to the mold wall surface by the plastic, and there is a tendency to open the mold, so that a proper mold clamping force is required for mold clamping. The mold expanding force slightly expands the mold under normal conditions, and the mold expanding force has an assisting effect on the exhaust of the mold; however, if the mold expansion force is too large, burrs and flashes of the molded product are easily caused, and even the mold is expanded. Therefore, when selecting a die casting machine, the die casting machine with a sufficiently large clamping force should be selected to prevent the die expansion phenomenon and to effectively maintain the pressure.

Under the new die-casting environmental conditions, some new die-casting processes need to be considered, such as gas-assisted forming, water-assisted forming, foaming die-casting and the like

Third, cooling stage

In the die casting mold, the design of the cooling system is very important. The reason is that the formed plastic product can not be deformed due to external force after being demoulded until the formed plastic product is cooled and solidified to certain rigidity. The cooling time accounts for about 70% -80% of the whole forming period, so that the well designed cooling system can greatly shorten the forming time, improve the die casting production rate and reduce the cost. An improperly designed cooling system can prolong the forming time and increase the cost; uneven cooling further causes warpage of the plastic article.

According to the experiment, the heat entering the mould from the melt is dissipated mainly in two parts, one of which is 5% transferred to the atmosphere by radiation and convection, the remaining 95% being transferred from the melt to the mould. The plastic product is in the mould, and due to the action of the cooling water pipe, heat is transferred to the cooling water pipe from the plastic in the mould cavity through the mould frame through heat conduction, and then is taken away by cooling liquid through heat convection. A small amount of heat which is not taken away by the cooling water is continuously conducted in the mold and is scattered in the air after contacting the outside.

The molding cycle of the die-casting molding is composed of mold closing time, filling time, pressure maintaining time, cooling time and demolding time. Wherein the proportion of the cooling time is the largest, and is about 70-80%. Therefore, the cooling time directly affects the molding cycle length and the yield of the plastic products. The temperature of the plastic product in the demolding stage should be cooled to be lower than the thermal deformation temperature of the plastic product so as to prevent the plastic product from being warped and deformed due to the relaxation phenomenon caused by residual stress or the external force of demolding.

Factors that affect the rate of cooling of the article are:

plastic product design. Mainly the wall thickness of the plastic product. The greater the thickness of the article, the longer the cooling time. Generally, the cooling time is proportional to the square of the thickness of the plastic or 1.6 times the maximum flow channel diameter. I.e. the plastic article is doubled in thickness and the cooling time is increased by a factor of 4.

The material of the mould and the cooling method thereof. The cooling rate of the mold material, including the mold core, cavity material, and mold frame material, is greatly affected. The higher the thermal conductivity of the mold material, the better the effect of transferring heat from the plastic per unit time and the shorter the cooling time.

And a cooling water pipe configuration mode. The closer the cooling water pipe is to the die cavity, the larger the pipe diameter is, the more the number is, the better the cooling effect is, and the shorter the cooling time is.

The flow rate of the cooling liquid. The greater the cooling water flow (generally preferred to achieve turbulence), the better the cooling water will carry away heat by thermal convection.

The nature of the cooling fluid. The viscosity and heat transfer coefficient of the cooling fluid also affect the heat transfer efficiency of the mold. The lower the viscosity of the cooling liquid, the higher the heat transfer coefficient, and the lower the temperature, the better the cooling effect.

And (4) selecting plastic. Plastic refers to a measure of the rate at which plastic conducts heat from a hot place to a cold place. The higher the heat conduction coefficient of the plastic is, the better the heat conduction effect is, or the specific heat of the plastic is low, the temperature is easy to change, so that the heat is easy to dissipate, the heat conduction effect is better, and the required cooling time is shorter.

And setting processing parameters. The higher the material temperature, the higher the mold temperature, the lower the ejection temperature, and the longer the cooling time required.

Design rules of the cooling system:

the cooling channels are designed to ensure uniform and rapid cooling.

The cooling system is designed to maintain proper and efficient cooling of the mold. The cooling holes should be of standard size for ease of machining and assembly.

When designing a cooling system, the mold designer must determine the following design parameters-the location and size of the cooling holes, the length of the holes, the type of holes, the arrangement and connection of the holes, and the flow rate and heat transfer properties of the cooling fluid-based on the wall thickness and volume of the plastic part.

Fourthly, demoulding stage

Demolding is the last step in a die-casting cycle. Although the product is formed by cold setting, demoulding still has important influence on the quality of the product, and improper demoulding mode can cause the defects of uneven stress of the product during demoulding, deformation of the product during ejection and the like. The demolding mode mainly comprises two modes: ejector pin drawing of patterns and stripper plate drawing of patterns. When the mold is designed, a proper demolding mode is selected according to the structural characteristics of the product so as to ensure the product quality.

For the mold adopting the ejector rods for demolding, the ejector rods are arranged uniformly as much as possible, and the positions of the ejector rods are selected to be the places with the largest demolding resistance and the largest strength and rigidity of the plastic part so as to prevent the plastic part from deforming and damaging.

The demoulding plate is generally used for demoulding a deep-cavity thin-wall container and a transparent product which is not allowed to have push rod traces, and the mechanism has the characteristics of large and uniform demoulding force, stable movement and no obvious trace left.

The die-casting pressure, the die-casting time, the die-casting temperature, the pressure maintaining pressure and time, and the back pressure are very important to the quality of the die-casting piece.

Pressure of die casting

The die casting pressure is provided by a hydraulic system of the die casting system. The pressure of the hydraulic cylinder is transmitted to the plastic melt through a screw of the die casting machine, the plastic melt enters a vertical runner (a main runner for partial dies) of the die, a main runner and a branch runner through a nozzle of the die casting machine under the pushing of the pressure, and enters a die cavity through a pouring gate, and the process is a die casting process or a filling process. The pressure is present to overcome the resistance of the melt during flow or, conversely, the resistance of the flow needs to be offset by the pressure of the die casting machine to ensure that the filling process is successful.

During die casting, the pressure at the die casting machine nozzle is highest to overcome the flow resistance of the melt throughout the entire process. Thereafter, the pressure is gradually reduced along the flow length toward the front of the melt front, which is the atmospheric pressure if the cavity interior is vented well.

There are many factors that affect melt fill pressure, and there are 3 categories in summary: (1) material factors such as type of plastic, viscosity, etc.; (2) structural factors such as the type, number and location of the gating system, the shape of the cavity of the mold, and the thickness of the product; (3) and (4) forming process elements.

Time of die casting

The die casting time is the time required for the plastic melt to fill the cavity, and does not include the auxiliary time for opening and closing the die. Although the die-casting time is short and has little influence on the molding cycle, the adjustment of the die-casting time has great effect on the pressure control of a sprue, a runner and a cavity. Reasonable die casting times facilitate the desired filling of the melt and are of great importance for improving the surface quality of the product and for reducing dimensional tolerances.

The die-casting time is far shorter than the cooling time, and is about 1/10-1/15 of the cooling time, and the rule can be used as a basis for predicting the whole forming time of the plastic part. When the die flow analysis is carried out, the die casting time in the analysis result is equal to the die casting time set in the process condition only under the condition that the melt is completely pushed by the rotation of the screw to fill the die cavity. If the holding pressure switching of the screw occurs before the cavity is filled, the analysis result will be greater than the setting of the process conditions.

Die casting temperature

The die casting temperature is an important factor affecting the die casting pressure. The charging barrel of the die casting machine has 5-6 heating sections, and each raw material has a proper processing temperature (the detailed processing temperature can be referred to data provided by a material supplier). The die casting temperature must be controlled within a certain range. The temperature is too low, the melt plastication is poor, the quality of a formed part is influenced, and the process difficulty is increased; the temperature is too high and the raw material is easily decomposed. In the actual die-casting process, the die-casting temperature is often higher than the barrel temperature, and the higher value is related to the die-casting speed and the material performance, and can reach 30 ℃ at most. This is due to the high heat generated by the shear experienced by the melt as it passes through the sprue. This difference can be compensated for in the mold flow analysis by trying to measure the temperature of the molten material as it is being cast empty and by including the nozzle in the modeling.

Pressure and time of pressure holding

Near the end of the die casting process, the screw stops rotating and only advances forward, at which point the die casting enters a dwell phase. And continuously feeding materials to the cavity by a nozzle of the die casting machine in the pressure maintaining process to fill the volume vacated by the shrinkage of the workpiece. If the mold cavity is not kept pressure after being filled, the product shrinks by about 25% in a large scale, and particularly, shrinkage marks are formed at the ribs due to excessive shrinkage. The holding pressure is generally about 85% of the maximum filling pressure, and is determined according to actual conditions.

Back pressure

The back pressure refers to the pressure which needs to be overcome when the screw rotates reversely and retreats for storing materials. The use of high back pressure facilitates dispersion of the colorant and melting of the plastic, but at the same time extends the screw retraction time, reduces the length of the plastic fibers, and increases the pressure of the die casting machine, so that the back pressure should be lower, typically not more than 20% of the die casting pressure. When the foam is die cast, the back pressure should be higher than the pressure created by the gas, otherwise the screw would be pushed out of the barrel. Some die casting machines can program the back pressure to compensate for the reduction in screw length during melting, which reduces the heat input and lowers the temperature. However, since the result of such a change is difficult to estimate, it is not easy to make a corresponding adjustment to the machine.

The pouring gate of the die-casting die is a section of passage from the runner to the die cavity and is the part with the smallest section and the shortest section in the pouring system. The location, number, shape and size of the gates have a direct impact on the quality of the plastic article and the appearance of the product.

The removal of pressure casting runner adopts and to accomplish through the mode of artifical shearing mostly among the prior art, and this has increased artificial amount of labour, and production efficiency is low, and the shearing mouth is inconsistent moreover, and the rejection rate is high, and the quality of product does not guarantee.

For example: the cutting of the gate of the windscreen wiper is usually completed manually, and the manual cutting of the gate has the problems of high labor intensity, low production efficiency and the like, and cannot meet the requirement of large-scale production.

Disclosure of Invention

The invention aims to solve the problems, provides a wiper gate cutting die, replaces the traditional manual operation, can realize the automatic cutting of a gate in a die, improves the production efficiency, and meets the requirement of large-scale production.

In order to realize the purpose, the invention adopts the technical scheme that: the device comprises an upper die body, a lower die body, a guide device and a limiting device, wherein the guide device and the limiting device are positioned between the upper die body and the lower die body; when the upper die body and the lower die body move relatively, the oblique sprue cutting assembly and the horizontal sprue cutting assembly synchronously realize sprue cutting.

Further, the upper die body comprises an upper die supporting plate and an upper die fixing plate; the lower die body comprises a lower die supporting plate, a first lower die positioning block and a second lower die positioning block, the wiper pouring body is arranged between the first lower die positioning block and the second lower die positioning block, and a square hole and a notch are formed in the upper die fixing plate.

Furthermore, the guide device comprises a guide sleeve and a guide shaft which are matched with each other, and the guide sleeve and the guide shaft are respectively fixed on the upper die supporting plate and the lower die supporting plate.

Furthermore, stop device is including using last spacing pole and lower spacing pole in the mutual coordination, goes up spacing pole and fixes respectively on last mould backup pad and lower mould backup pad with lower spacing pole, goes up spacing pole and sets up for coaxial alternate between the spacing pole down.

Furthermore, the oblique sprue cutting assembly comprises an oblique guide mechanism, a transverse moving mechanism and a cutting tool, wherein the transverse moving mechanism is arranged on the upper die supporting plate, and the cutting tool is fixed at the lower end of the transverse moving mechanism; when the upper die body and the lower die body perform relative motion, the transverse moving mechanism performs downward inclined movement under the guiding action of the inclined guiding mechanism, and when the transverse moving mechanism performs downward inclined movement, the cutting tool cuts off the inclined pouring opening.

Furthermore, the transverse moving mechanism comprises a guide rail seat fixed at the bottom of the upper die fixing plate and a slide block arranged in the guide rail seat, the cutting tool is fixed at the bottom of the slide block, and a transverse moving reset mechanism is arranged on the slide block.

Further, the transverse moving reset mechanism comprises a fixed block, a rod body and a spring, wherein the fixed block is movably arranged in the square hole; one end of the rod body is arranged in the square hole and connected with the fixed block, and the other end of the rod body is arranged in the notch and connected with the limiting flange; the spring is sleeved on the rod body and arranged in the gap.

Furthermore, the inclined guide mechanism comprises an inclined guide rod and a guide seat which are matched with each other, the inclined guide rod is fixed at the bottom of the sliding block, and the guide seat is fixed at the upper end of the lower die supporting plate.

Furthermore, the horizontal sprue cutting assembly comprises a guide rod and a cutting block, the top of the guide rod is fixed on the upper die supporting plate, and the lower end of the guide rod vertically and movably penetrates through the second lower die positioning block and then is connected with the cutting block.

The invention has the beneficial effects that: the invention provides a wiper gate cutting die which replaces the traditional manual operation, can realize the automatic cutting of a gate in a die, improves the production efficiency and meets the requirement of large-scale production.

1. When the pouring gate of the windscreen wiper is cut off, the cutter feeding speed is high, the cutting is crisp and falls off, and the cut is flat and has no sawteeth.

2. The invention comprises the cutting of the inclined pouring gate and the horizontal pouring gate of the windscreen wiper, the cutting of the inclined pouring gate and the horizontal pouring gate is synchronously carried out, and the degree of automation is high.

3. A guide device and a limiting device are arranged between the upper die body and the lower die body, the guide device realizes the precision of the relative motion of the upper die body and the lower die body, and the precise cutting can be completed; the limiting device can realize accurate control of the lower stroke, and perfect cutting of the pouring gate is realized.

4. The inclined guide mechanism can accurately control the inclined movement direction of the transverse moving mechanism, the accuracy of the cutter falling of the inclined sprue cutting assembly is improved, and the perfect cutting of the inclined sprue is realized.

5. After the inclined pouring gate is cut off, the transverse moving reset mechanism can help the inclined pouring gate cutting assembly to reset, and the automation degree is improved.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

FIG. 2 is a schematic partial perspective view of the present invention with the upper mold support plate removed.

The text labels in the figures are represented as: 1. a lower limit lever; 2. a lower die supporting plate; 3. a first lower die positioning block; 4. a second lower die positioning block; 5. cutting off the block; 6. a guide seat; 7. a guide shaft; 8. inclining the guide rod; 9. a guide rail seat; 10. a slider; 11. a guide sleeve; 14. a guide bar; 15. a cutting tool; 16. an upper die supporting plate; 17. an upper limiting rod; 18. a fixed block; 19. a rod body; 20. a spring; 21. a limiting flange; 1301. a square hole; 1302. and (4) a notch.

Detailed Description

The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.

Example 1: the concrete structure of the invention is as follows: the device comprises an upper die body, a lower die body, a guide device and a limiting device, wherein the guide device and the limiting device are positioned between the upper die body and the lower die body; when the upper die body and the lower die body move relatively, the oblique sprue cutting assembly and the horizontal sprue cutting assembly synchronously realize sprue cutting.

When the inclined sprue cutting assembly and the horizontal sprue cutting assembly cut the sprue of the windscreen wiper, the advantages of high cutter feeding speed, crisp falling, smooth notch, no sawtooth and the like exist. Meanwhile, the cutting of the inclined pouring gate and the horizontal pouring gate of the windscreen wiper are achieved, the inclined pouring gate and the horizontal pouring gate are cut synchronously, and the degree of automation is high.

Preferably, the upper mold body includes an upper mold support plate 16 and an upper mold fixing plate 13; the lower die body comprises a lower die supporting plate 2, a first lower die positioning block 3 and a second lower die positioning block 4, the wiper pouring body is arranged between the first lower die positioning block 3 and the second lower die positioning block 4, and a square hole 1301 and a notch 1302 are formed in the upper die fixing plate 13.

Preferably, the guide means comprises a guide sleeve 11 and a guide shaft 7 which are used in cooperation with each other, and the guide sleeve 11 and the guide shaft 7 are fixed to the upper die support plate 16 and the lower die support plate 2, respectively.

Preferably, stop device uses upper limit rod 17 and lower limit rod 1 including mutually supporting, and upper limit rod 17 and lower limit rod 1 are fixed respectively on last mould backup pad 16 and lower mould backup pad 2, go up for coaxial alternate setting between limit rod 17 and the lower limit rod 1.

Preferably, the slant gate cutting assembly comprises a slant guide mechanism, a traversing mechanism and a cutting tool 15, the traversing mechanism is installed on the upper die supporting plate 16, and the cutting tool 15 is fixed at the lower end of the traversing mechanism; when the upper die body and the lower die body perform relative motion, the transverse moving mechanism performs downward inclined movement under the guiding action of the inclined guiding mechanism, and when the transverse moving mechanism performs downward inclined movement, the cutting tool 15 cuts off the inclined pouring opening.

The guide device realizes the precision of the relative motion of the upper die body and the lower die body, and can finish the precise cutting; the limiting device can realize accurate control of the lower stroke, and perfect cutting of the pouring gate is realized.

Preferably, the transverse moving mechanism comprises a guide rail seat 9 fixed at the bottom of the upper die fixing plate 13 and a slide block 10 arranged in the guide rail seat 9, the cutting tool 15 is fixed at the bottom of the slide block 10, and the transverse moving reset mechanism is arranged on the slide block 10.

After the inclined pouring gate is cut off, the transverse moving reset mechanism can help the inclined pouring gate cutting assembly to reset, and the automation degree is improved.

Preferably, the transverse moving reset mechanism comprises a fixed block 18, a rod body 19 and a spring 20, wherein the fixed block 18 is movably arranged in the square hole 1301; one end of the rod body 19 is arranged in the square hole 1301 and connected with the fixed block 18, and the other end of the rod body is arranged in the notch 1302 and connected with the limiting flange 21; the spring 20 is disposed on the rod 19 and in the notch 1302.

Example 2: the concrete structure of the invention is as follows: the device comprises an upper die body, a lower die body, a guide device and a limiting device, wherein the guide device and the limiting device are positioned between the upper die body and the lower die body; when the upper die body and the lower die body move relatively, the oblique sprue cutting assembly and the horizontal sprue cutting assembly synchronously realize sprue cutting.

Preferably, the inclined guide mechanism comprises an inclined guide rod 8 and a guide seat 6 which are matched with each other, the inclined guide rod 8 is fixed at the bottom of the sliding block 10, and the guide seat 6 is fixed at the upper end of the lower die supporting plate 2.

The inclined guide mechanism can accurately control the inclined movement direction of the transverse moving mechanism, the accuracy of the cutter falling of the inclined sprue cutting assembly is improved, and the perfect cutting of the inclined sprue is realized.

Example 3: the concrete structure of the invention is as follows: the device comprises an upper die body, a lower die body, a guide device and a limiting device, wherein the guide device and the limiting device are positioned between the upper die body and the lower die body; when the upper die body and the lower die body move relatively, the oblique sprue cutting assembly and the horizontal sprue cutting assembly synchronously realize sprue cutting.

Preferably, the transverse moving reset mechanism comprises a fixed block 18, a rod body 19 and a spring 20, wherein the fixed block 18 is movably arranged in the square hole 1301; one end of the rod body 19 is arranged in the square hole 1301 and connected with the fixed block 18, and the other end of the rod body is arranged in the notch 1302 and connected with the limiting flange 21; the spring 20 is fitted over the rod 19 and disposed in the notch 1302,

Preferably, the horizontal gate cutting assembly comprises a guide rod 14 and a cutting block 5, the top of the guide rod 14 is fixed on the upper die supporting plate 16, and the lower end of the guide rod 14 vertically movably penetrates through the second lower die positioning block 4 and then is connected with the cutting block 5.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.

Claims

1. A wiper sprue cutting die is characterized by comprising an upper die body, a lower die body, a guide device and a limiting device, wherein the guide device and the limiting device are positioned between the upper die body and the lower die body; when the upper die body and the lower die body move relatively, the oblique sprue cutting assembly and the horizontal sprue cutting assembly synchronously realize sprue cutting.

2. The wiper gate cutting die of claim 1, wherein the upper die body comprises an upper die support plate (16) and an upper die fixing plate (13); the lower die body comprises a lower die supporting plate (2), a first lower die positioning block (3) and a second lower die positioning block (4), the wiper pouring body is arranged between the first lower die positioning block (3) and the second lower die positioning block (4), and a square hole (1301) and a notch (1302) are formed in the upper die fixing plate (13).

3. The gate cutting die for the windscreen wiper as set forth in claim 2, wherein the guide means comprises a guide bushing (11) and a guide shaft (7) cooperating with each other, the guide bushing (11) and the guide shaft (7) being fixed to the upper mold support plate (16) and the lower mold support plate (2), respectively.

4. The gate cutting die for the windscreen wiper as set forth in claim 2, wherein the limiting device comprises an upper limiting rod (17) and a lower limiting rod (1) which are used in cooperation with each other, the upper limiting rod (17) and the lower limiting rod (1) are respectively fixed on the upper die supporting plate (16) and the lower die supporting plate (2), and the upper limiting rod (17) and the lower limiting rod (1) are coaxially arranged at intervals.

5. The wiper blade gate cutting die of claim 2, wherein the slant gate cutting assembly comprises a slant guide mechanism, a traverse mechanism and a cutting tool (15), the traverse mechanism is mounted on the upper die supporting plate (16), and the cutting tool (15) is fixed to the lower end of the traverse mechanism; when the upper die body and the lower die body perform relative motion, the transverse moving mechanism performs downward inclined movement under the guiding action of the inclined guiding mechanism, and when the transverse moving mechanism performs downward inclined movement, the cutting tool (15) cuts off the inclined pouring opening.

6. The gate cutting die for the windscreen wiper as set forth in claim 5, wherein the traversing mechanism comprises a rail seat (9) fixed on the bottom of the upper die fixing plate (13) and a slide block (10) installed in the rail seat (9), the cutting tool (15) is fixed on the bottom of the slide block (10), and the slide block (10) is provided with a traversing reset mechanism.

7. The gate cutting die for the windscreen wiper as set forth in claim 6, wherein the transverse moving reset mechanism comprises a fixed block (18), a rod body (19) and a spring (20), wherein the fixed block (18) is movably arranged in the square hole (1301); one end of the rod body (19) is arranged in the square hole (1301) and connected with the fixed block (18), and the other end of the rod body is arranged in the notch (1302) and connected with the limiting flange (21); the spring (20) is sleeved on the rod body (19) and arranged in the notch (1302).

8. The gate cutting die for the windscreen wiper as set forth in claim 7, wherein the inclined guide mechanism comprises an inclined guide rod (8) and a guide seat (6) which are used in cooperation with each other, the inclined guide rod (8) is fixed at the bottom of the sliding block (10), and the guide seat (6) is fixed at the upper end of the lower die supporting plate (2).

9. The wiper blade gate cutting die of claim 2, wherein the horizontal gate cutting assembly comprises a guide rod (14) and a cutting block (5), the top of the guide rod (14) is fixed on the upper die supporting plate (16), and the lower end of the guide rod (14) vertically passes through the second lower die positioning block (4) and then is connected with the cutting block (5).