A wax injection molding die
The multi-dimensional design of the core rod and ejector rod solves the problem of complex structures that are difficult to form in wax injection molding molds, and realizes efficient and precise wax mold production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QIANYU PRECISION HARDWARE CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-06-30
AI Technical Summary
Existing wax injection molding dies are unable to simultaneously achieve the molding of complex structures in multiple directions and dimensions, resulting in low efficiency and poor precision.
Design a wax injection molding mold that uses a multi-dimensional combination of core rod one, core rod two, core rod three and ejector rod to directly form a wax model with complex structures such as through holes, side holes and stepped holes through the mold closing and core pulling process.
It enables the direct molding of complex structure wax molds without subsequent processing, thus improving production efficiency and molding accuracy.
Smart Images
Figure CN224424191U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wax injection molding, and specifically to a wax injection molding mold. Background Technology
[0002] Wax injection molding is a key process in precision casting (such as lost-wax casting). It involves injecting molten wax into a mold cavity, which cools to form a wax model that matches the shape of the final casting. Subsequent processes such as shell coating, dewaxing, firing, and pouring are then used to obtain the precision casting. However, existing wax injection molding dies have the following shortcomings in practical applications: For wax models with complex structures such as through holes, side holes, stepped holes, and grooves, the core-pulling mechanism of traditional molds is designed in a simple way, making it difficult to achieve multi-directional and multi-dimensional structural forming at the same time. This often requires multiple mold splits or subsequent processing, resulting in low efficiency and poor precision.
[0003] Therefore, in order to overcome the shortcomings of the existing technology, it is necessary to design a wax injection molding mold with a simple structure. Utility Model Content
[0004] This utility model provides a wax injection molding die to solve the problems of the prior art.
[0005] The objective of this utility model can be achieved through the following technical solution: A wax injection molding mold includes a base, a lower mold, and an upper mold. The lower mold is fixed on the base. The lower mold has a lower mold cavity inside. One side of the lower mold cavity is connected to a wax injection port. The base has a liftable push rod inside. The push rod moves upward and extends to the outer through hole of the lower mold cavity. The base has a liftable core rod one inside. The core rod one has a round hole on its inner side. The core rod one moves upward and extends to the core-pulling channel of the lower mold cavity. The upper mold is set at the upper end of the lower mold. The upper mold has an upper mold cavity that matches the lower mold cavity. The upper mold has a liftable core rod two inside. The core rod two passes through the upper mold cavity to contact the push rod. The diameter of the part of the core rod two located in the lower mold cavity is smaller than the diameter of the push rod. The lower mold has movable core rod three on both sides. The inner side of the core rod three is placed in the lower mold cavity.
[0006] In a further improvement, the base is provided with a lower lifting plate and a middle lifting plate. The lower lifting plate is mounted on the base via a drive assembly one. The top rod is fixed to the lower lifting plate and passes through the middle lifting plate. The middle lifting plate is mounted on the base via a drive assembly two. The core rod one is fixed to the middle lifting plate.
[0007] In a further improvement, the upper mold is provided with an upper lifting plate, and the upper end of the second core rod is fixedly connected to the upper lifting plate.
[0008] In a further improvement, a lower guide post is provided on the lower end face of the upper mold, and a lower slot matching the lower guide post is provided on the lower mold. An upper guide post is provided on the upper end face of the lower mold, and an upper slot matching the upper guide post is provided on the upper mold.
[0009] A further improvement is that the outer side of the wax injection port is flared.
[0010] Compared with the prior art, the beneficial effects of this utility model wax injection molding die are as follows:
[0011] Through the multi-dimensional cooperation of core rod one, core rod two, core rod three and top rod, wax molds with complex structures such as through holes, side holes and stepped holes can be directly formed without subsequent processing, thus improving production efficiency and molding accuracy. Attached Figure Description
[0012] Figure 1 This is a structural schematic diagram of the present invention.
[0013] Figure 2 This is a structural diagram of the lower mold position in this utility model.
[0014] Figure 3 This is a structural diagram of the upper mold position in this utility model.
[0015] Figure 4 for Figure 2 Schematic diagram of the structure for removing the wax model
[0016] Figure 5 This is a structural schematic diagram of a partial cross-sectional view of the present invention.
[0017] Figure 6 This is a structural schematic diagram of a partial sectional view of the present invention.
[0018] In the diagram, 1-base, 2-lower mold, 21-lower mold cavity, 22-wax injection port, 23-external through hole, 24-core pulling channel, 3-upper mold, 31-upper mold cavity, 32-core rod two, 41-top rod, 42-core rod one, 421-round hole, 43-core rod three, 51-lower guide post, 52-lower slot, 53-upper guide post, 54-upper slot, 61-lower lifting plate, 611-drive component one, 62-middle lifting plate, 621-drive component two, 63-upper lifting plate. Detailed Implementation
[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; unless otherwise expressly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, they can refer to fixed connections or detachable connections, etc. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0020] The following is a description of the embodiments and appendices. Figures 1-6 The technical solution of this utility model will be further described below.
[0021] Example 1
[0022] A wax injection molding die includes: a base 1, a lower mold 2, and an upper mold 3. The lower mold 2 is fixed to the base 1 and has a lower mold cavity 21 inside. One side of the lower mold cavity 21 is connected to a wax injection port 22. The base 1 has a liftable push rod 41 that extends upward to the outer through hole 23 of the lower mold cavity 21. The base 1 also has a liftable core rod 42 with a circular hole 421 on its inner side. The core rod 42 extends upward. The upper mold 3 is located at the upper end of the lower mold 2, and the upper mold 3 is provided with an upper mold cavity 31 that matches the lower mold cavity 21. The upper mold 3 is provided with a liftable core rod 32, which passes through the upper mold cavity 31 to contact the top rod 41. The diameter of the part of the core rod 32 located in the lower mold cavity 21 is smaller than the diameter of the top rod 41. The lower mold 2 is provided with movable core rods 43 on both sides, and the inner side of the core rods 43 is placed in the lower mold cavity 21.
[0023] like Figures 1-6 As shown, the working principle of this utility model is as follows:
[0024] When the mold is closed, the upper mold and the lower mold are tightly closed, and the upper mold cavity and the lower mold cavity combine to form a complete wax model outer shape cavity;
[0025] The ejector rod rises along the outer through hole into the lower mold cavity, while the core rod rises along the core-pulling channel into the lower mold cavity. The round hole at its end can form a through hole structure inside the wax model.
[0026] The second core rod descends from above through the upper mold cavity, and its lower end contacts the top rod. Because the diameter of the second core rod located in the lower mold cavity is smaller than the diameter of the top rod, a stepped hole structure can be formed in the wax mold.
[0027] The three core rods on both sides extend horizontally into the lower mold cavity, which can form a side hole structure on the side of the wax model.
[0028] Molten wax is injected into the mold cavity through the wax injection port, filling the closed space formed by the mold cavity and core rods one, two, three and the ejector pin. After the wax cools and solidifies, a wax mold with a complex structure is formed.
[0029] First, drive the two core rods on both sides to move horizontally outward to complete the side core pulling. Then, raise the upper mold. Core rod 2 rises synchronously with the upper mold and is pulled out from the stepped hole of the wax pattern. Finally, core rod 1 rises along the core pulling channel and the ejector rod rises along the outer through hole to smoothly eject the wax pattern from the lower mold cavity and complete the demolding.
[0030] Through the multi-dimensional cooperation of core rod one, core rod two, core rod three and top rod, wax molds with complex structures such as through holes, side holes and stepped holes can be directly formed without subsequent processing, thus improving production efficiency and molding accuracy.
[0031] As a further preferred embodiment, the base 1 is provided with a lower lifting plate 61 and a middle lifting plate 62. The lower lifting plate 61 is mounted on the base 1 by a drive assembly 611. The top rod 41 is fixed on the lower lifting plate 61 and passes through the middle lifting plate 62. The middle lifting plate 62 is mounted on the base 1 by a drive assembly 621. The core rod 42 is fixed to the middle lifting plate 62.
[0032] The lower lifting plate is driven by drive assembly one (such as a cylinder or hydraulic cylinder), and the push rod is fixed on the lower lifting plate to achieve independent lifting of the push rod; the middle lifting plate is driven by drive assembly two (independent of drive assembly one), and the core rod one is fixed on the middle lifting plate to achieve independent lifting of the core rod one; the push rod passes through the middle lifting plate, and the movement paths of the two do not interfere with each other, and the action sequence of drive assembly one and two can be controlled.
[0033] As a further preferred embodiment, the upper mold 3 is provided with an upper lifting plate 63, and the upper end of the second core rod 32 is fixedly connected to the upper lifting plate 63. The upper lifting plate is driven by a driving device (such as a cylinder or lead screw), and the upper end of the second core rod is fixedly connected to the upper lifting plate to realize the synchronous lifting of the second core rod.
[0034] As a further preferred embodiment, the lower end face of the upper mold 3 is provided with a lower guide post 51, the lower mold 2 is provided with a lower slot 52 matching the lower guide post 51, the upper end face of the lower mold 2 is provided with an upper guide post 53, and the upper mold 3 is provided with an upper slot 54 matching the upper guide post 53. During mold closing, the lower guide post at the lower end of the upper mold is precisely inserted into the lower slot of the lower mold, and the upper guide post at the upper end of the lower mold is precisely inserted into the upper slot of the upper mold. The guide post and slot are fitted with a clearance fit, and mechanical positioning restricts the relative displacement of the upper and lower molds in the horizontal direction, ensuring complete alignment of the upper and lower mold cavities.
[0035] As a further preferred embodiment, the outer side of the wax injection port 22 is flared. The flared structure enlarges the inlet end of the wax injection port (e.g., into a 45°~60° cone shape), increasing the mating area between the wax injection gun and the wax injection port, and reducing the difficulty of aligning the wax injection gun.
[0036] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.
Claims
1. A wax injection mold characterized by, include: The system comprises a base, a lower mold, and an upper mold. The lower mold is fixed to the base and has a lower mold cavity inside. One side of the lower mold cavity is connected to a wax injection port. The base contains a liftable push rod that extends upward to the outer through hole of the lower mold cavity. The base also contains a liftable core rod 1 with a circular hole on its inner side. The core rod 1 extends upward to the core-pulling channel of the lower mold cavity. The upper mold is located above the lower mold and has an upper mold cavity that matches the lower mold cavity. The upper mold contains a liftable core rod 2 that passes through the upper mold cavity to contact the push rod. The diameter of the core rod 2 portion located in the lower mold cavity is smaller than the diameter of the push rod. The lower mold has movable core rods 3 on both sides, with the inner side of the core rod 3 placed inside the lower mold cavity.
2. A wax shot-moulding mould according to claim 1, characterised in that The base is provided with a lower lifting plate and a middle lifting plate. The lower lifting plate is set on the base by a drive assembly one. The top rod is fixed on the lower lifting plate and passes through the middle lifting plate. The middle lifting plate is set on the base by a drive assembly two. The core rod one is fixed on the middle lifting plate.
3. A wax shot-moulding mould according to claim 1, characterised in that The upper mold is provided with an upper lifting plate, and the upper end of the second core rod is fixedly connected to the upper lifting plate.
4. A wax shot-molding die according to claim 1, wherein The lower end face of the upper mold is provided with a lower guide post, and the lower mold is provided with a lower slot that matches the lower guide post. The upper end face of the lower mold is provided with an upper guide post, and the upper mold is provided with an upper slot that matches the upper guide post.
5. A wax shot-molding die according to claim 1, wherein The outer side of the wax injection port is flared.