Double-station vertical wax injection machine

Abstract

A double-station vertical wax injection machine comprises two sets of independently-used workbenches, each workbench comprises an upper die and a lower die which can move in opposite directions, and an injection mechanism capable of moving in a reciprocating mode is arranged between the two workbenches. The injection mechanism moves oppositely on the upper mold and the lower mold of the workbench on one side, moves to the workbench on the side after the upper mold and the lower mold are closed, and injects materials into a cavity formed in the upper mold and the lower mold; when the workbench on one side is heated to fix materials in the upper mold and the lower mold, the injection mechanism moves towards the workbench on the other side, and the workbench on the side synchronously carries out opposite movement of the upper fixing plate and the lower fixing plate. The double-station wax injection machine has the beneficial effects that by arranging the injection mechanism capable of reciprocating, the two workbenches can alternately perform wax injection operation, so that the advantages of double stations are fully utilized, one station is always in a working state without waiting for the other station to complete the operation, and the production efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wax injection machine, especially to a double-station vertical wax injection machine. BACKGROUND

[0002] In the prior art, the double-station vertical wax injection machine is widely used in the wax mold manufacturing link in the precision casting industry. Its main function is to inject the wax material in the molten state into the mold cavity through the wax injection nozzle to form a wax mold consistent with the shape of the casting. In use, the operator first places the mold on the workbench and fixes it through the clamping body; then starts the hydraulic drive device to make the hydraulic telescopic rod drive the mold pressing plate to press down to close the mold; then the wax injection process is completed by the wax injection nozzle, and finally the formed wax mold is taken out. This equipment is usually equipped with two independent workbenches, aiming to improve production efficiency and meet the needs of different specifications of molds.

[0003] Chinese patent document CN206747526U discloses a double vertical wax injection machine, which comprises a vertical base, a hydraulic drive device is arranged on one side of the top of the vertical base, a hydraulic connection unit is arranged on the top of the middle position of the vertical base, a pressure gauge is arranged on the top of the hydraulic connection unit, workbenches are arranged on both sides of the hydraulic connection unit, a wax injection nozzle is arranged on one side of the top of the workbench, a clamping body is arranged on the top of the workbench, a mold pressing plate is arranged above the clamping body, a connecting block is connected to the top of the mold pressing plate, a hydraulic telescopic rod is connected to the top of the connecting block, the top of the hydraulic telescopic rod is connected to a support frame, a control box is arranged on the top of the support frame, a display screen is arranged on the control box, a wax adding maintenance door is arranged on the middle position of the vertical base, storage boxes are arranged on both sides of the wax adding maintenance door, and supporting legs are further arranged on the bottom of the vertical base.

[0004] Although this equipment is configured with two independent lifting workbenches, each station needs to be equipped with a separate wax injection device, resulting in low resource utilization. In actual production process, when one station is performing wax injection operation, the other station can only be in waiting state and cannot simultaneously perform other process operation. This design fails to fully exert the advantages of double stations, limits the further improvement of production efficiency, and also increases the equipment cost and maintenance complexity, which is difficult to meet the efficient and flexible production demand. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a double-station vertical wax injection machine for improving the use efficiency of double stations.

[0006] In order to realize the above-mentioned purpose, the utility model discloses the following technical scheme: a double-station vertical wax injection machine, comprising two groups of independent worktables, the worktable comprises the upper die and lower die that can move towards each other, a reciprocating injection mechanism is arranged between the two worktables, the injection mechanism moves to the side worktable after the upper die and lower die of the side worktable move towards each other and the upper die and lower die are closed, and injects the cavity formed in the upper die and lower die; when the side worktable is heated to fix the material in the upper die and lower die, the injection mechanism moves towards the other side worktable, and the other side worktable synchronously moves the upper fixed plate and lower fixed plate towards each other.

[0007] The utility model has the advantages that: through the setting reciprocating injection mechanism, two worktables can alternately carry out wax injection operation, so that the advantages of double stations are fully utilized, it is ensured that one station is always in working condition without waiting for the other station to complete operation, and production efficiency is remarkably improved. Meanwhile, the design reduces idle time of equipment, and optimizes the wax injection process. When one side worktable is being heated to solidify the material in the upper die and lower die, the injection mechanism can be immediately switched to the other side worktable, and the closing action of the upper die and lower die is completed synchronously with the other side worktable, so that the wax injection process is continuous and efficient. In addition, since the injection mechanism can be quickly switched between the two worktables, time waste caused by waiting is further reduced, and the utilization rate of the whole equipment is improved.

[0008] Further, the injection mechanism comprises a fixed table, a guide groove is arranged at the center of the fixed table, a guide rack slidable in the guide groove is arranged in the guide groove, a driving motor is fixed on the fixed table, an output tooth meshing with the guide rack is arranged at the front end of the driving motor, and an injection nozzle connected with the material box is arranged at the two ends of the guide rack.

[0009] Through the arrangement of the guide groove and the guide rack on the fixed table, and the meshing of the output tooth and the guide rack driven by the driving motor, the accurate reciprocating movement of the injection nozzle is realized, so that the accuracy of the wax injection position is ensured, and the failure of wax injection or material waste caused by position deviation is avoided. The structure design is not only simple and reliable, but also has high transmission accuracy and stability. In addition, the introduction of the driving motor makes the movement speed and stroke of the injection nozzle controllable, which can be flexibly adjusted according to the requirements of different stations, and the adaptability and universality of the equipment are enhanced.

[0010] Further, an injection hole matched with the injection nozzle is arranged on the lower die, the injection hole is connected with the cavity formed after the upper die and lower die are closed, an anti-backflow component is arranged in the injection hole, and the anti-backflow component is used to prevent the material in the upper die and lower die from overflowing out of the upper die and lower die after the injection nozzle exits the injection hole.

[0011] By setting the anti-backflow component in the injection hole, the material backflow problem that may occur after the injection nozzle is separated from the injection hole is effectively solved, thereby avoiding the material overflow in the cavity after the upper and lower molds are closed, and ensuring the stable and reliable wax injection quality. This design is especially suitable for the wax injection scene of high-viscosity materials, which can significantly reduce the waste rate caused by material overflow. As a preferred way, the anti-backflow component can adopt a combination structure of a plunger and an elastic element, wherein the plunger is opened under pressure when the injection nozzle injects material, and is pushed back to close the channel by the elastic element after the injection nozzle is withdrawn, thereby realizing the automatic anti-backflow function. This structure is simple and easy to maintain, and can maintain stable sealing performance in multiple wax injection cycles.

[0012] Further, the injection hole includes a connecting section connected with the injection nozzle and a feeding section for transporting material into the cavity formed after the upper and lower molds are closed, and the connecting section and the feeding section are in vertical relationship with each other; the anti-backflow component includes a plunger and an elastic element providing a restoring force for the plunger, both of which are arranged in the connecting section, and the pressure of the injection nozzle when injecting material into the injection hole is greater than the restoring force of the elastic element.

[0013] By dividing the injection hole into a connecting section and a feeding section and making them in vertical relationship, not only is the docking of the injection nozzle and the injection hole facilitated, but also the material is effectively guided into the cavity after the upper and lower molds are closed, thereby improving the wax injection efficiency and uniformity. At the same time, the anti-backflow component composed of the plunger and the elastic element controls the opening and closing state through the pressure difference, ensuring that the material does not backflow or leak during the wax injection process. As a preferred way, a stepped abutting surface can be provided in the connecting section, and the front end of the plunger is adapted to the stepped abutting surface, so that when the plunger is completely closed, its length exceeds the distance between the stepped abutting surface and the feeding section, thereby forming a more airtight sealing effect. This design not only enhances the anti-backflow capability, but also maintains good durability and reliability in long-term use.

[0014] Further, the connecting section is provided with a stepped abutting surface, the front end of the plunger is adapted to the stepped abutting surface, and the length of the plunger when abutting against the stepped abutting surface is greater than the distance between the stepped abutting surface and the feeding section.

[0015] By incorporating a stepped abutment surface within the connecting section and adapting it to the plunger's front end, the plunger can tightly conform to the stepped abutment surface in the closed state, forming a reliable sealing barrier to prevent material from overflowing from the injection port. The plunger's length is designed to exceed the distance between the stepped abutment surface and the feed section when closed, further enhancing the sealing effect and avoiding the risk of material leakage due to pressure fluctuations or external interference. As a preferred option, the plunger can be made of wear-resistant and corrosion-resistant engineering plastics or metals to extend its service life and adapt to different types of wax injection materials. Furthermore, the machining precision of the stepped abutment surface can be further improved to ensure that the plunger achieves optimal sealing with each closure, thereby guaranteeing the stability and consistency of the wax injection process. Attached Figure Description

[0016] Fig. 1 This is an isometric view of an embodiment of the present utility model;

[0017] Fig. 2 This is an isometric view of the injection mechanism according to an embodiment of the present invention;

[0018] Fig. 3 This is a partial cross-sectional view of the injection hole and anti-backflow component according to an embodiment of the present invention; Detailed Implementation

[0019] This utility model embodiment provides a dual-station vertical wax injection machine, such as... Figs. 1-3 As shown, the wax injection machine includes two independently used worktables 3. Each worktable 3 consists of an upper mold 31 and a lower mold 32, which can move closer to each other to achieve mold closing. An injection mechanism 1 capable of reciprocating movement is positioned between the two worktables. This injection mechanism 1 moves to one side after mold closing on one worktable 3 and injects material into the cavity (not shown) formed by the upper and lower molds. When one worktable 3 is heated to fix the material, the injection mechanism 1 moves to the other worktable 3, and simultaneously, the upper and lower molds of that worktable 3 begin to move towards each other in preparation for mold closing.

[0020] The injection mechanism 1 includes a fixed platform 11, with a guide groove 111 at its center. A slidable guide rack 112 is installed within the guide groove 111. A drive motor 113 is also fixed on the fixed platform 11. The front end of the drive motor 113 is equipped with output teeth 1131, which mesh with the guide rack 112, thereby driving the guide rack 112 to move back and forth within the guide groove 111. Injection nozzles 1121 are connected to both ends of the guide rack 112. These injection nozzles 1121 are connected to a material box (not shown in the figure) for injecting material into the mold.

[0021] A injection hole 2 is designed on the lower mold 31 and cooperates with the injection nozzle 1121. The injection hole 2 is connected with the cavity (not shown in the figure) formed after the upper and lower molds are closed. In order to prevent the material from overflowing the mold after the injection nozzle 1121 is withdrawn, an anti-backflow component 21 is also installed in the injection hole 2. The injection hole 2 is divided into two parts, one part is a connecting section 22 connected with the injection nozzle 1121, and the other part is a feeding section 23 for delivering the material into the cavity (not shown in the figure), and the two parts are in a vertical relationship. The anti-backflow component 21 includes a plunger 211 and an elastic member 212 providing a restoring force for the plunger 211. When the injection nozzle 1121 injects the material into the injection hole 2, the pressure is greater than the restoring force of the elastic member 212, so that the plunger 211 is pushed away and allows the material to enter the mold. A step abutting surface 221 is arranged in the connecting section 22, and the front end of the plunger 211 is adapted to the step abutting surface 221. When the plunger 211 abuts against the step abutting surface 221, the length thereof exceeds the distance between the step abutting surface 221 and the feeding section 23, thereby effectively preventing the material from backflowing.

[0022] The working principle of the wax injection machine is as follows: first, the upper and lower molds of the one side workbench move towards each other to complete the mold closing operation. The driving motor 113 is started, the output teeth 1131 drive the guide rack 112 to slide in the guide groove 111, thereby driving the injection nozzle 1121 to align the injection hole 2 on the lower mold, so that the injection nozzle 1121 injects the material into the cavity formed by the upper and lower molds. At the same time, the pressure of the injection nozzle 1121 overcomes the restoring force of the elastic member 212 in the anti-backflow component 21, the plunger 211 is pushed away, and the material smoothly enters the mold. When the injection is completed, the injection nozzle 1121 withdraws from the injection hole 2, the plunger 211 is reset under the action of the elastic member 212, and the injection hole 2 is blocked to prevent the material from overflowing. Subsequently, the side workbench 3 starts heating to fix the material, and the injection mechanism 1 moves to the other side workbench 3 to repeat the above operation.

[0023] It should be noted that the cavity (not shown in the figure) formed after the upper and lower molds are closed has a shape consistent with the shape of the product to be produced. In addition, how the injection nozzle 1121 is connected with the material tank (not shown in the figure) and how the material is injected into the upper and lower molds belong to the prior art, and will not be described in detail here.

[0024] The above embodiment is only one of the preferred specific embodiments of the present application, and the usual changes and replacements made by those skilled in the art within the scope of the technical solutions of the present application are all included in the protection scope of the present application.

Claims

1. A double station vertical wax injection machine comprising two sets of work stations which are used independently, said work stations comprising an upper mold and a lower mold which are movable towards each other, characterized in that: Two workstations are provided with a reciprocating injection mechanism, which moves to the side of the workbench after the upper and lower molds of the side workbench move towards each other and moves to the cavity formed in the upper and lower molds to inject material; when the side workbench is heated to fix the material in the upper and lower molds, the injection mechanism moves towards the other side of the workbench and the side workbench synchronously moves the upper and lower fixed plates towards each other; the injection mechanism includes a fixed table, a guide slot is arranged at the center of the fixed table, a guide rack is arranged in the guide slot and can slide in the guide slot, a drive motor is fixed on the fixed table, an output tooth is arranged at the front end of the drive motor and engages with the guide rack, and an injection nozzle connected with the material box is arranged at both ends of the guide rack.

2. The double station vertical wax injector of claim 1, wherein: The lower mold is provided with an injection hole matched with the injection nozzle, the injection hole is connected with the cavity formed after the upper and lower molds are closed, and an anti-backflow component is arranged in the injection hole to prevent the material in the upper and lower molds from overflowing out of the upper and lower molds after the injection nozzle exits the injection hole.

3. The double station vertical wax injector of claim 2, wherein: The injection hole includes a connecting section connected with the injection nozzle and a feeding section for transporting material into the cavity formed after the upper and lower molds are closed, and the connecting section and the feeding section are perpendicular to each other; the anti-backflow component includes a plunger arranged in the connecting section and an elastic member providing a restoring force for the plunger, and the pressure of the injection nozzle when injecting material into the injection hole is greater than the restoring force of the elastic member.

4. The double station vertical wax injector of claim 3, wherein: A step abutting surface is arranged in the connecting section, the front end of the plunger is matched with the step abutting surface, and the length of the plunger when abutting against the step abutting surface is greater than the distance between the step abutting surface and the feeding section.

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