Jewelry rubber mold press device

Abstract

The invention relates to a jeweler's rubber mold pressing device that ensures the alignment and placement of a two-part (upper and lower) rubber mold used in the injection of wax into rubber molds for jewelry investment casting technology. This is achieved by pressing the mold and aligning it with the injection nozzle of the injection machine in both vertical and horizontal directions, and then pushing it onto the nozzle.

Description

[0001] JEWELRY RUBBER MOLD PRESS DEVICE

[0002] TECHNICAL FIELD

[0003] The invention relates to a jeweler's rubber mold pressing device that ensures the alignment and placement of a two-piece (upper and lower) rubber mold used in the injection of wax into rubber molds for jewelry investment casting technology, by pressing the mold and aligning it with the injection nozzle of the injection machine.

[0004] PRIOR ART

[0005] In the jewelry investment casting process, rubber molds are used in the preparation of wax models. These rubber molds, which contain pre-formed cavities of the products to be manufactured, consist of two parts: an upper and a lower part. In order to inject wax into the rubber molds, the mold must first be aligned with the injection nozzle of the wax injection machine, ensuring the mold cavity aligns with the nozzle opening. Then, the two-part rubber mold set must be compressed and fixed at a certain pressure. In this way, wax is injected into the rubber molds to prepare wax models, which are then used in the investment casting process.

[0006] The required compression pressure during the wax injection process varies depending on the volume and area of the cavity within the rubber mold. This pressure value needs to be determined on a model-by-model basis. In the known techniques, compressed air is used to generate this compression pressure during the injection process.

[0007] Pneumatic actuators are insufficient for aligning the rubber mold sprue with the nozzle of the injection machine. Considering that rubber molds vary in thickness and surface area for different models (i.e. , larger molds require greater compression force), achieving the necessary model-specific pressure with pneumatic actuators is quite challenging. Moreover, this situation leads to time loss in practice and generates unnecessary noise, which is a disadvantage in terms of ergonomic machine use. It also hinders the proper execution of the rubber mold compression process. The main reasons for this are delays in the pneumatic system's pressure adjustment mechanism reaching the set value, air leaks, and pressure fluctuations due to variations in air temperature. These drawbacks cause model defects, known in the industry as "flashing," in the wax models obtained within the rubber mold. Furthermore, aligning the rubber molds with the injection nozzle, especially in molds with varying heights and widths, presents difficulties. Additionally, pneumatic systems incur extra costs in terms of installation, operation, and maintenance. Therefore, there is a need for new systems to align and compress jeweler's rubber molds.

[0008] BRIEF DESCRIPTION OF THE INVENTION

[0009] The invention relates to a device that ensures the alignment and placement of a two-part (upper and lower) rubber mold used in the injection of wax into rubber molds for jewelry investment casting technology, by pressing the mold and aligning it with the injection nozzle of the injection machine. Our invention is used in the jewelry investment casting process to align the rubber molds used for wax modeling with the flow path of the injection nozzle and to keep them under a certain pressure during injection.

[0010] In the jewelry manufacturing industry, during the investment casting process, the sprue of the rubber molds used in the production of wax models needs to be aligned with the nozzle of the injection machine. In mass production, automating this alignment instead of doing it manually is crucial. Our invention automatically aligns the sprues of rubber molds, whether they are the same or different sizes, with the injection nozzle. This provides a significant advantage in mass production. Additionally, thanks to the barcode system and sensor located under the rubber molds in our invention, modelbased injection parameters can be created, and the alignment of the injection nozzle and rubber mold sprue is achieved with high precision.

[0011] Our invention prevents the technical problems associated with pneumatic systems, such as delays in adjusting the required model-specific compression pressure, difficulty in quickly reaching the set pressure value, and noise that creates disadvantages in terms of ergonomic use. In our invention, since the compression of the rubber molds is carried out with a screw drive system using a servomotor, difficulties in adjusting the pressure value and pressure fluctuations that may occur due to temperature effects are prevented. In addition, the alignment of the rubber mold with the injection nozzle, both horizontally and vertically, and its approach to the injection nozzle can be done precisely using servomotors. Thus, our invention offers a system that requires lower investment costs, enables more precise production, and provides a quieter working environment. LIST OF FIGURES

[0012] Figure 1. General View of the Upper Part of the Device

[0013] Figure 2. General View of the Lower Part of the Device

[0014] Corresponding Numbers in Figures

[0015] 1. Servomotorl

[0016] 2. Servomotor2

[0017] 3. Servomotors

[0018] 4. Clamping block

[0019] 5. Leadscrew

[0020] 6. End bearing

[0021] 7. Linear bearing

[0022] 8. Coupling

[0023] 9. Upper housing

[0024] 10. Barcode reader

[0025] 11. Pusher block

[0026] 12. Horizontal alignment block

[0027] 13. Lower housing

[0028] 14. Slide bearings

[0029] 15. Vertical alignment block

[0030] 16. Servomotor4

[0031] 17. Mounting holes

[0032] DETAILED DESCRIPTION OF THE INVENTION

[0033] The invention comprises the following elements: servomotorl (1 ), servomotor2 (2), servomotors (3), clamping block (4), leadscrew (5), end bearing (6), linear bearing (7), coupling (8), upper housing (9), barcode reader (10), pusher block (11 ), horizontal alignment block (12), lower housing (13), slide bearings (14), vertical alignment block (15), servomotor4 (16), and mounting holes (17).

[0034] In our invention, firstly, the rubber mold to be injected with wax is placed on the vertical alignment block (15) of the device. Then, the injection sprue of the rubber mold is aligned with the injection nozzle of the injection machine. For this purpose, servomotor4 (16) mounted on the lower housing (13) of the device, servomotor2 (2) mounted on the rear side of the rubber mold on the upper housing (9), and servomotors (3) mounted on the side of the upper housing (9) operate and position the mold based on the information received from the barcode reader (10) which reads the barcode attached to the bottom of the rubber mold. After aligning the sprue of the rubber mold with the injection nozzle of the injection machine by positioning, servomotorl (1 ), located on the top of the upper housing (9), is actuated to clamp the rubber mold at a certain pressure, ensuring that the pressurized molten wax from the injection nozzle fills the rubber mold uniformly. The leadscrews (5) used in the alignment and clamping mechanisms provide blockage, preventing any misalignment and changes in compression pressure of the rubber molds during the injection process.

[0035] Servomotor2 (2), servomotors (3), and servomotor4 (16) perform the alignment process; while servomotorl (1 ) performs the clamping process. The transmission of motion from the motors to the rubber mold is achieved through leadscrews (5) used in the respective directions of motion. The necessary movements are transferred from servomotorl (1 ), servomotor2 (2), servomotors (3), and servomotor4 (16) to the leadscrews (5) via couplings (8). The angular rotation values required for the alignment operations and for obtaining the clamping force are determined, and the rotation of servomotorl (1 ), servomotor2 (2), servomotors (3), and servomotor4 (16) actuators is ensured.

[0036] The clamping block (4), to which the leadscrew (5) connected to servomotorl (1 ) - responsible for the compression process - is attached via an end bearing (6), can move vertically thanks to linear bearings (7).

[0037] The leadscrews (5) connected to servomotor2 (2), servomotors (3), and servomotor4 (16), which perform the alignment operations, are connected to the pusher block (11 ), horizontal alignment block (12), and vertical alignment block (15), respectively, using end bearings (6), thus achieving horizontal and vertical movements. In other words, the leadscrew (5) connected to servomotor2 (2) is connected to the pusher block (11 ), the leadscrew (5) connected to servomotors (3) is connected to the horizontal alignment block (12), and the leadscrew (5) connected to servomotor4 (16) is connected to the vertical alignment block (15) using end bearings (6). Based on this, the pusher block (11 ) is moved by servomotor2 (2), the horizontal alignment block (12) is moved by servomotors (3), and the vertical alignment block (15) is moved by servomotor4 (16). The vertical alignment block (15), located in the lower housing (13), is supported by slide bearings (14) and performs the vertical alignment task by moving in the vertical direction. Vertical and horizontal alignment operations are carried out thanks to the barcodes placed on the rubber molds. Based on the information received from the barcode reader (10), these barcodes ensure that the model-based rubber molds are aligned with the injection nozzle. They also enable the adjustment of process parameters such as the required pressing force, injection wax temperature, and injection time, all according to the specific model.

Claims

CLAIMS1. It is a jeweler's rubber mold pressing device, characterized by;- servomotorl (1 ), which is located on the top of the upper housing (9) and performs the clamping process,- servomotor2 (2), which is mounted on the rear of the rubber mold on the upper housing (9), performs the alignment process, and moves the pusher block (11 ),- servomotors (3), which is mounted on the side of the upper housing (9), performs the alignment process, and moves the horizontal alignment block (12),- servomotor4 (16), which is mounted on the lower housing (13), performs the alignment process, and moves the vertical alignment block (15),- the clamping block (4), which is connected to the leadscrew (5) coupled to servomotorl (1 ) using an end bearing (6),- leadscrews (5) used in the alignment and clamping mechanisms, which provide blockage and prevent misalignment and changes in clamping pressure of the rubber molds during the injection process,- couplings (8) that transfer the motion from servomotorl (1 ), servomotor2 (2), servomotors (3), and servomotor4 (16) to the leadscrews (5),- a barcode reader (10) that reads the barcode attached to the bottom of the rubber mold,- a pusher block (11 ) connected to the leadscrew (5) coupled to servomotor2 (2) using an end bearing (6),- a horizontal alignment block (12) connected to the leadscrew (5) coupled to servomotors (3) using an end bearing (6),- a vertical alignment block (15) connected to the leadscrew (5) coupled to servomotor4 (16) using an end bearing (6),- mounting holes (17).

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