Composite ejection device for plastic mold

Abstract

The utility model discloses a composite ejection device for a plastic mold, belongs to the technical field of plastic molds, and aims to solve the problem that demolding is difficult due to incomplete one-time ejection caused by the fact that an ejector rod is easily adhered to a plastic part. The composite ejection device comprises a lower mold box, and an L-shaped support is fixedly connected to the position, close to the rear end, of the top of the lower mold box; by arranging the secondary ejection mechanism, after injection molding of a workpiece is completed and the workpiece is cooled, the air cylinder is opened to drive the first push plate to ascend, the first push plate drives the first jacking column to ascend to demold the workpiece, in the continuous ascending process, the baffle pushes the triangular rod to rotate, and the triangular rod drives the second push plate to continue to ascend through the rotation effect; therefore, the situation that demolding is difficult due to the fact that an ejector rod and a plastic part are bonded is effectively avoided. And meanwhile, the ejection process is more stable through secondary jacking, the situation that too large force is concentrated on the workpiece is avoided, and impact on the die is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plastic mould, concretely relates to a composite ejection device for plastic mould. BACKGROUND

[0002] The plastic mould is a tool for producing plastic products, which is made of mould steel or other alloy materials. The plastic mould is used for injection moulding, blow moulding, compression moulding and other plastic processing processes. The ejection structure is an important part of the mould, which is used to eject the plastic products from the mould cavity after injection moulding, ensuring that the finished products can be smoothly demoulded.

[0003] The prior art patent No. CN211993791U discloses a push plate ejection structure of a plastic mould. The device includes a casing, an internal cavity of the casing, a driving mechanism at the bottom of the internal cavity, a bottom plate fixedly connected to the bottom of the internal cavity, a transmission mechanism at the front end of the bottom plate, a heat dissipation fan at the right top of the casing, a rotating mechanism at the rear end of the heat dissipation fan, and a push rod. The device has a reasonable structure and can quickly eject the formed plastic products from the mould cavity, improving the work efficiency. However, in actual use, the device still has the following disadvantages: the device drives the push rod to rise and eject the plastic products from the mould cavity through the driving mechanism. However, when producing plastic parts with strong adhesion, the plastic products may be tightly adhered to the push rod after cooling, resulting in incomplete ejection and increasing the risk of demoulding difficulty.

[0004] Therefore, there is a need for a composite ejection device for a plastic mould to solve the problem of incomplete ejection and demoulding difficulty caused by the adhesion of the push rod to the plastic parts in the prior art. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a composite ejection device for a plastic mould to solve the problem in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a composite ejection device for a plastic mould, comprising a lower mould box, an L-shaped bracket fixedly connected to the top of the lower mould box near the rear end, two hydraulic rods fixedly connected to the top lower surface of the L-shaped bracket, an upper mould plate fixedly connected to the bottom of the two hydraulic rods, a forming groove formed in the top of the lower mould box, a secondary ejection mechanism arranged in the lower mould box, and a maintenance door rotatably connected to the front end of the lower mould box.

[0007] It should be noted that the bottom of the lower mould box is fixedly connected to a plurality of shock-absorbing foot pads.

[0008] Further worth mentioning is that the front end of the access door is provided with an observation window, and the front end of the access door is fixedly connected with a handle.

[0009] Further need to be explained is that the outer wall of the lower die box is coated with a silicon carbide ceramic coating.

[0010] As a preferred embodiment, the secondary ejection mechanism comprises a support plate fixedly connected to the inner wall of the lower die box on both sides near the bottom, a gas cylinder fixedly connected to the bottom of the support plate, a first push plate fixedly connected to the output end of the gas cylinder, a limiting slide plate fixedly connected to both sides of the first push plate, two first lifting columns fixedly connected to the top of the first push plate, a second push plate slidingly connected to the outer wall of the two first lifting columns, two second lifting columns fixedly connected to the top of the second push plate near the outer side, two support plates fixedly connected to the top of the first push plate, two triangular rods rotatably connected to the top of the first push plate near the outer side, a first guide wheel rotatably connected to the inner end of each of the two triangular rods, and a second guide wheel rotatably connected to the outer end of each of the two triangular rods.

[0011] As a preferred embodiment, the inner wall of the lower die box on both sides is provided with a limiting sliding groove corresponding to the limiting slide plate.

[0012] As a preferred embodiment, the top of each of the two first lifting columns and the top of each of the two second lifting columns is fixedly connected with a protective top head, and each protective top head is tightly fitted with a through hole formed in the inner wall of the forming groove.

[0013] As a preferred embodiment, the outer wall of each of the two first guide wheels and the outer wall of each of the two second guide wheels is fixedly connected with a buffer sleeve.

[0014] Compared with the prior art, the composite ejection device for the plastic mold provided by the utility model has at least the following beneficial effects:

[0015] (1) By setting the secondary ejection mechanism, after the workpiece is injection molded and cooled, the gas cylinder is opened to drive the first push plate to rise, the first push plate drives the first lifting column to rise to demold the workpiece, in the process of continuous rising, the baffle pushes the triangular rod to rotate, the triangular rod drives the second push plate to continue rising through the rotating action, thereby driving the second lifting column to perform secondary ejection on the workpiece, effectively avoiding the situation that the top rod and the plastic part are bonded to cause difficult demolding; at the same time, the secondary lifting makes the ejection process more stable, avoiding the situation that too much force is concentrated on the workpiece, reducing the impact on the mold.

[0016] (2) By setting the access door and observation window, the access door can facilitate the operator to quickly check, clean and maintain the inside of the mold device, saving the time and effort of disassembling other parts, thereby improving the maintainability and working efficiency of the equipment; the observation window provides the convenience of observing the working state of the mold inside without opening the access door, and the operator can monitor the operation of the equipment in real time, find problems or faults in time, and avoid production interruption due to failure to find in time. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a first perspective structural schematic view of the utility model;

[0018] Figure 2 It is a second perspective structural schematic view of the utility model;

[0019] Figure 3 It is a primary state view of the secondary ejection mechanism of the utility model;

[0020] Figure 4 It is a jacking state view of the secondary ejection mechanism of the utility model.

[0021] In the figure: 1, lower mold box; 2, L-shaped support; 3, hydraulic rod; 4, upper mold plate; 5, forming groove; 6, secondary ejection mechanism; 601, support plate; 602, air cylinder; 603, first push plate; 604, limiting sliding plate; 605, first jacking column; 606, second push plate; 607, second jacking column; 608, support plate; 609, triangular rod; 610, first guide wheel; 611, second guide wheel; 612, baffle; 7, access door. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with examples.

[0023] Please refer to Figures 1-4 The utility model provides a kind of composite ejection device for plastic mold, including lower mold box 1, lower mold box 1 top near rear end position is fixedly connected with L-shaped support 2, and L-shaped support 2 top lower surface is fixedly connected with two hydraulic rods 3, and the bottom of two hydraulic rods 3 is fixedly connected with upper mold plate 4, and the top of lower mold box 1 is provided with forming groove 5, and the inside of lower mold box 1 is provided with secondary ejection mechanism 6, and lower mold box 1 front end is rotatably connected with access door 7.

[0024] Further as Figure 1 And Figure 2As shown, it is worth noting that the bottom of the lower mold box 1 is fixedly connected with a plurality of shock-absorbing foot pads, which can effectively absorb and reduce the vibration generated during the operation of the mold, prevent the vibration from spreading to the ground or other equipment, protect other parts of the equipment, and reduce wear and damage caused by vibration; the shock-absorbing foot pads can improve the stability of the equipment, avoid shaking or imbalance of the mold during operation, thereby improving the precision and running stability of the equipment, which is crucial for the accuracy of the plastic mold equipment.

[0025] Further as shown in Figure 1 and Figure 2 , it is worth noting that the front end of the access door 7 is provided with an observation window, and the front end of the access door 7 is fixedly connected with a handle. The observation window allows the operator to view the working condition of the mold inside, the equipment operation condition or possible problems without opening the access door 7, which helps to monitor the operation of the equipment in real time and avoid unnecessary downtime. The design of the handle makes it more convenient to open and close the access door 7, and the operator can easily open or close the door.

[0026] Further as shown in Figure 1 and Figure 2 , it is worth noting that the outer wall of the lower mold box 1 is coated with a silicon carbide ceramic coating. Silicon carbide ceramic has excellent corrosion resistance and can resist the corrosion of various chemicals. During the processing of the plastic mold, it may come into contact with acid or alkaline solution or other corrosive substances. Coating the silicon carbide ceramic coating can effectively prevent the corrosion of the outer surface of the mold and improve the durability of the mold.

[0027] According to the above working process, it can be known that by setting the access door 7 and the observation window, the access door 7 can facilitate the operator to quickly check, clean and maintain the inside of the mold device, saving time and effort in disassembling other parts, thereby improving the maintainability and working efficiency of the equipment; the observation window provides the convenience of observing the working condition of the mold inside without opening the access door. The operator can monitor the operation of the equipment in real time, discover problems or faults in time, and avoid production interruption due to failure to discover in time.

[0028] Further as shown in Figure 3 and Figure 4As shown, worth noting is that the secondary ejection mechanism 6 comprises a support plate 601 fixedly connected to the inner walls of the lower mold box 1 near the bottom, the bottom of the support plate 601 is fixedly connected with a gas cylinder 602, the output end of the gas cylinder 602 is fixedly connected with a first push plate 603, the two sides of the first push plate 603 are fixedly connected with a limiting sliding plate 604, the top of the first push plate 603 is fixedly connected with two first lifting columns 605, the outer wall of the two first lifting columns 605 is slidingly connected with a second push plate 606, the top of the second push plate 606 near the outer side is fixedly connected with two second lifting columns 607, the top of the first push plate 603 is fixedly connected with two support plates 608, the top of the first push plate 603 near the outer side is rotatably connected with two triangular rods 609, the inner end of the two triangular rods 609 is rotatably connected with a first guide wheel 610, the outer end of the two triangular rods 609 is rotatably connected with a second guide wheel 611, the inner wall of the two sides of the lower mold box 1 near the top is fixedly connected with a baffle 612, by arranging the secondary ejection mechanism 6, the adhesion between the ejector rod and the plastic part is effectively avoided, which makes it difficult to demold; at the same time, the secondary lifting makes the ejection process more stable, avoids the case that too much force is concentrated on the workpiece, and reduces the impact on the mold.

[0029] Further as shown in Figure 3 and Figure 4 , worth noting is that the inner walls of the two sides of the lower mold box 1 are each provided with a limiting sliding groove corresponding to the limiting sliding plate 604, the limiting sliding groove plays a limiting and guiding role for the movement of the limiting sliding plate 604, so that the lifting of the first push plate 603 is more stable.

[0030] Further as shown in Figure 3 and Figure 4 , worth noting is that the top of the two first lifting columns 605 and the top of the two second lifting columns 607 are each fixedly connected with a protective top head, and the plurality of protective top heads are each closely fitted with the through holes provided in the inner wall of the forming groove 5, the design of the protective top head can effectively avoid the direct contact of the lifting column with the surface of the mold, thereby reducing the friction and wear of the inner wall of the mold during the lifting process, by closely fitting with the through holes in the inner wall of the forming groove 5, the protective top head can form a buffer layer, preventing the surface of the mold from being damaged due to improper operation or impact, and the close fitting can ensure that the ejection effect is guaranteed while ensuring that the design of the mold is more reasonable and compact, thereby improving the working efficiency and safety of the overall equipment.

[0031] Further as shown in Figure 3 and Figure 4 , worth noting is that the outer wall of the two first guide wheels 610 and the outer wall of the two second guide wheels 611 are each fixedly connected with a buffer sleeve, the buffer sleeve can ensure that the movement of the guide wheel is more stable, reduce unnecessary vibration and deviation, and ensure smooth operation of the ejection device, which is very beneficial to improving production efficiency and mold precision.

[0032] The scheme has the following working process: in actual use, when the workpiece injection molding is completed and cooled, the air cylinder 602 is opened to drive the first push plate 603 to rise, the first push plate 603 drives the first lifting column 605 to rise to demold the workpiece, in the process of the first push plate 603 continuing to rise, the baffle 612 hinders the triangular rod 609 and pushes it to rotate, the triangular rod 609 drives the second push plate 606 to continue to rise through the rotating action, thereby driving the second lifting column 607 to perform secondary ejection on the workpiece, avoiding the adhesion of the ejector rod and the plastic part to cause difficult demolding.

[0033] In summary: by setting the access door 7 and the observation window, the access door 7 can facilitate the operator to quickly check, clean and maintain the inside of the mold device, saving the time and effort of disassembling other components, thereby improving the maintainability and work efficiency of the equipment; the observation window provides the convenience of observing the working state of the mold without opening the access door, the operator can monitor the operation of the equipment in real time, find problems or faults in time, and avoid production interruption due to failure to find problems in time; by setting the secondary ejection mechanism 6, the adhesion of the ejector rod and the plastic part to cause difficult demolding is effectively avoided; at the same time, the secondary lifting makes the ejection process more stable, avoiding the situation that too much force is concentrated on the workpiece, reducing the impact on the mold.

Claims

1. A composite ejection device for a plastic mould comprising a lower mould box (1), characterised in that: The lower mold box (1) top near the rear end position is fixedly connected with an L-shaped support (2), the L-shaped support (2) top lower surface is fixedly connected with two hydraulic rods (3), the two hydraulic rods (3) bottom are fixedly connected with an upper mold plate (4), the lower mold box (1) top is provided with a forming groove (5), the lower mold box (1) is internally provided with a secondary ejection mechanism (6), and the lower mold box (1) front end is rotatably connected with an access door (7).

2. A composite ejection device for a plastic mold according to claim 1, characterized in that: The lower mold box (1) bottom is fixedly connected with a plurality of shock-absorbing foot pads.

3. A composite ejection device for plastic molds according to claim 1, characterized in that: The access door (7) front end is provided with an observation window, and the access door (7) front end is fixedly connected with a handle.

4. A composite ejection device for plastic molds according to claim 1, characterized in that: The lower mold box (1) outer wall is coated with a silicon carbide ceramic coating.

5. A composite ejection device for plastic molds according to claim 1, characterized in that: The secondary ejection mechanism (6) comprises a support plate (601) fixedly connected to the inner walls of the lower mold box (1) on both sides near the bottom, a gas cylinder (602) fixedly connected to the bottom of the support plate (601), a first push plate (603) fixedly connected to the output end of the gas cylinder (602), a limiting sliding plate (604) fixedly connected to the both sides of the first push plate (603), two first lifting columns (605) fixedly connected to the top of the first push plate (603), a second push plate (606) slidably connected to the outer wall of the two first lifting columns (605), two second lifting columns (607) fixedly connected to the top of the second push plate (606) near the outer side, two support plates (608) fixedly connected to the top of the first push plate (603), two triangular rods (609) rotatably connected to the top of the first push plate (603) near the outer side, a first guide wheel (610) rotatably connected to the inner end of each of the two triangular rods (609), a second guide wheel (611) rotatably connected to the outer end of each of the two triangular rods (609), and a baffle (612) fixedly connected to the inner walls of the lower mold box (1) on both sides near the top.

6. A composite ejection device for a plastic mold according to claim 5, wherein: The inner walls of the lower mold box (1) on both sides are provided with limiting sliding grooves corresponding to the limiting sliding plates (604).

7. A composite ejection device for a plastic mold as defined in claim 5, wherein: The top of the two first lifting columns (605) and the top of the two second lifting columns (607) are fixedly connected with protective tips, and the protective tips are tightly fitted with the through holes in the inner wall of the forming groove (5).

8. A composite ejection device for a plastic mold as defined in claim 5, wherein: The outer walls of the two first guide wheels (610) and the two second guide wheels (611) are fixedly connected with buffer sleeves.

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