Announcement on the completion of the industrial and commercial change registration of wholly-owned subsidiaries

All members of the company and the board of directors guarantee that the content of information disclosure is true, accurate, and complete without false records, misleading statements, or major omissions.

Shenzhen Changhong Technology Co., Ltd. (hereinafter referred to as the "Company") received a notice from the wholly-owned subsidiary Shenzhen Boomingshing Medical Device Co., Ltd. (hereinafter referred to as "Boomingshing"), and actively responded to the call of the national and local governments to take effective actions To support the epidemic prevention of new coronaviruses, the company's business scope will be adjusted accordingly, and "production and management of masks and forehead guns" will be added.

At present, the registration procedures for industrial and commercial change (registration) have been completed and the "Business License" issued by the Shenzhen Municipal Market Supervision Administration has been obtained. The main information is as follows:

Unified Social Credit Code: 91440300552122647A

Company Name: Shenzhen Boomingshing Medical Device Co., Ltd.

Type: Limited liability company (wholly owned by the legal person)

Legal representative: Li Huanchang

Date of establishment: March 11, 2010

Address: Floor 1 to 3, No. 4 Plant, Fuxingda Industrial Park, East Lanzhu Road, Pingshan New District, Shenzhen

Business period: Sustainable operation

Business Scope: Class I (Class I) medical consumables and medical devices, Class II 6841 medical testing and the design and development, production, processing, and sales of basic equipment and appliances, production and operation of masks and forehead guns; digital product accessories, production, processing, and sale of plastic products; import and export of goods, import and export of technology (articles prohibited by laws and administrative regulations; articles restricted by laws and administrative regulations must be licensed before they can operate). Engaged in Class II medical testing and sales of basic equipment; Class II and Class III injection puncture instruments, medical polymer materials and products, medical hygiene materials, and dressings. "

Special announcement!

Board of Directors of Shenzhen Changhong Technology Co., Ltd.

February 19, 2020


Printer Light Guide Button

Undesirable phenomenon:

1. Bubbles inside the product, NG for light guide (as shown below).


2. Deformation of the elastic reset buckle of the product (as shown below).


Reason: Due to the long packing pressure of 11×11×11 during molding, the PC material has poor fluidity. The design diameter of the main channel ∅4 affects the fluidity during molding. The size of the inlet: 0.8×1.2, which affects the inlet Unreasonable ejection design for speed and pressure. Only 4 ∅1.5 ejectors are ejected. Due to the large injection pressure required by the light guide, ejection is unbalanced and the product sticks to the mold.


Zebra Printer Roll Paper Shaft

Function: drive thermal induction roll paper thermal printing.

Undesirable phenomenon: flow marks on the surface of the product, runout degree 0.1mm, actual measurement: 0.22mm, judge NG.

Reason: The product uses POM material. The melting temperature of POM is close to the decomposition temperature, and the moldability is poor. When the material flows to the position of PL during molding, there are surface flow marks, resulting in a runout of 0.1mm. The actual measurement is 0.22, NG.


Toyota Car Dashboard

Material: PP + E / P-TD20.

Undesirable phenomenon: oil accumulates on the parting line after the product is sprayed, and the appearance is judged to be NG.

Reason: There is a mismatch in the parting position of the product, and the mismatch is 0.05mm. Due to the corresponding injection in the rear stage of the product, the appearance is NG. The mold price is controlled within the tolerance range of 0.03, which is the direct cause of the mismatch. The reason is the mold temperature difference between the cavity and core. (50 ℃ for the cavity and 25 ℃ for the core during injection).


Reasons Why You Should Consider Rapid Tooling

Rapid tooling is a combination of conventional tooling methods and rapid prototyping techniques to create molds faster. With this process, it cuts the time and the cost of producing a mold, ensuring that the product gets into production quicker and reach the market over its competition.

There are many types of rapid prototyping methods available in the market that can help the design team to perfect their product before reaching its customers. But among them, rapid tooling is the frequent choice because of its benefits.

It’s no wonder why because this mold tooling technique is a great way to get the parts inexpensively and quickly. In other words, rapid tooling is the best for making fast and cost-effective molds. Want to know more why rapid tooling is the go-to technique? Read this article to find out.


The Advantages of Rapid Tooling

Before we go to the discussion of why rapid tooling is beneficial for different industries, let’s take a look at the reason why it is essential.

It does not only create a product mold in quickly, but it also helps the designer to take things in the right direction. When the time between the initial design and the prototype is shorter, designers will have the opportunity to analyze it in a real environment. It will give them an idea if they have chosen the right material for the product and if certain parts are viable to serve its purpose.

One of the biggest challenges in production is when the design imperfection is discovered too late, when it is already in the production phase or when the mold is near its completion. Significant faults can have a substantial financial impact on the company. Rapid tooling helps address this issue as the design flaws can be detected earlier.

Lower Cost

The lower the cost of raw materials, the lower the production cost is. And if you are using these molds for your products, you can sell the products without sacrificing its quality and profit. There is a direct domino effect in using rapid tooling; your products can be more saleable to your customers. With cheaper but high-quality products, you can face your competitions and win.


When you have an accurate and precise process, you can produce more parts with a wide range of materials. And the good news is that even if the molds are produced faster through rapid tooling, it can have the same quality as traditional molds but not expensive. It does not affect the strength, color, and surface finishing at all.

Product Consistency

Remember that it uses digital processes and using the same prototype or file can lower the chance of errors and inconsistencies. It speeds up the process even more and produces more products of the same.

You can have more process options with rapid tooling. And that is good news if you want to present more products to your customers. In rapid tooling, you can choose between low volume production for tens to hundreds of parts. Or the intermediate volume processing that can produce hundreds to thousands in quantities. Each has its own set of mold-making processes that enables you to have more options to choose from.

Lastly, It can help your business through bridge production. It refers to a method where you can create a product in small batches and release it to your market before going to full production. It is beneficial to your business because you can introduce the product earlier and gain profit from it before producing the rest.

If there are design flaws, you can correct them before going into mass production. You cannot fix the deficiencies once it is with your customers. Instead, it will create a wrong impression and will be costly for your business.


What’s In Store for Rapid Tooling?

With rapid tooling opening new doors for options in developing parts and products, many companies are investing in technologies that will allow them to create products on demand. The days of conventional tooling are outnumbered with the efficiency and swift delivery of parts.

Because it has reached the domestic level, meaning people can now handle CNC machining tasks even in their garage. The end product has almost the same precision as big manufacturers and workshops.

If you can use these industry-grade materials for your projects, imagine the limitless possibilities it presents to individuals with knowledge and ideas on manufacturing methods. Rapid tooling has made prototyping more accessible.

Companies should not delay their rapid tooling initiatives, or else they will be left out by their competition. Today’s issue is no longer about price and quality, as there are answers to that. What is more pressing is speed, as every industry is focused on delivering results faster. And rapid tooling can help them meet the requirements of the customers to gain a competitive edge.


Die Casting Mold Manufacturing for Superior Repeatability

Die casting mold from CHT Die Casting and Machining utilizes aluminum and zinc alloys to produce small to large run part identical castings for your manufacturing needs. Die cast mold development is a versatile process that enables the production of a large quantity of small to medium-size castings.

Contact us for more information regarding die cast molds manufacturing processes or call us at 510-523-2541 and we will be happy to assist you with any questions that you may have regarding die cast molds and numerous die cast molds processes.

Die Cast Mold Manufacturing Processes

Die casting is a manufacturing process that is commonly used for producing accurately dimensioned, sharply defined, smooth, or textured surface metal parts. It is accomplished by forcing molten metal under high pressure into reusable metal dies. The die casting molds process follows the subsequent procedures regarding die cast mold manufacturing:

  • A mold is created in at least two sections to allow the proper removal of the casting.
  • The sections are mounted securely within the machine and are arranged so that one is stationary while the other is moveable.
  • The two are tightly clamped together.
  • Molten metal is injected into the die cavity where it quickly solidifies.
  • The die halves are drawn apart and the casting is ejected.

When compared with sand or permanent mold processes, HPDC (High Pressure Die Casting) is the fastest method in the industry for producing highly precise non-ferrous metal parts.


Die Cast Mold Benefits

There are numerous advantages regarding the usage of die casting (or HPDC) process. At CHT Die Casting, we can provide you with die cast molds that match your design specifications. Some of the advantages and disadvantages of the HPDC molds process include the following:

Die Casting Molds Advantages

  • Net shape part configuration is achievable
  • High dimensional accuracy is achievable
  • Fast production
  • Thinner walls are achievable when compared to investment and sand castings
  • Wide range of possible shapes
  • External threads can be casted
  • Steel inserts can be over-molded
  • Holes can be cored to internal tap drill size

Die Casting Molds Disadvantages

  • A relatively large production volume is required to make the process cost-effective. (However, CHT would work with customers ways to mitigate this shortcoming.)
  • High initial cost (tool, set up)
  • Minimum wall thickness: 0.040"
  • Maximum wall thickness: 0.200". In some cases, acceptable up to 0.50"
  • Draft radius and fillets required on the casting
  • Potential porosity issue


Die Cast Mold Material Options

CHT Die Casting and Machining offers to die casting dies for aluminum and zinc alloys: P-20, H-11, H-13, Premium Grade H13 (per NADCA No.229), Superior Grade H13 (per NADCA No. 229), or other grades as defined in NADCA No. 229. Additionally, CHT will guarantee 1 million shots tool life for tool making parts from zinc ZAMAK alloys and 100K shots tool life for tooling making parts from aluminum alloys.

Contact us for more information regarding our aluminum and zinc alloy die cast molds and die cast molds processes, or request a quote for further pricing details today. We are an industry-leading provider of advanced die casting and machining services.


Customs & Logstics

For the majority of export orders, we ship F.O.B. Shenzhen, but if you have any concerns, questions or special requirements, please be sure to let us know and we will be only-too-happy to help.

Shipping Options

Here is a simple introduction to shipping options:


Sea Shipping

Generally taking around 6 weeks, it is the most cost-effective way to ship particularly heavy products (like high-precision plastic injection molds from CHT!) or large-volume products, ike thousands of beautiful plastic parts.

As one of the greatest objections to China manufacturing, the long shipping times makes it a true challenge to then make necessary changes once the tool is at its' final destination.

To combat this, we go through stringent quality checks and controls to ensure that we only ever ship the very best products.

On the advice of some sound advice from industry peers, we also manufacture a small batch of 'emergency parts', in the event that - when the tool is on the ocean - the parts are needed right away. In this case, we can air-ship the parts to the client (or often the client's client) to tide them over until the tool arrives.

Air Freight

Taking around 1 week, Air Freight is ideal for non-urgent sample shipping and often preferred by the automotive industry for all products due to tight time restrictions and lead-times.

Express Companies

Ideal for urgent sample reviews, small-batch part reviews, and shipping project related items (like reports, plans, and other associated documents) this is both the fastest and most expensive way to ship parts and products around the World.


Before we start a project together, we will share our preferred methods of shipping, logistics partner-company details and express company account details, so that when the time comes to ship items, there is no confusion and no delay.



Many of our long-term trusted clients even relocate their own staff to locations within our facility to ensure on-site support and fast, clear communication at the time of order shipping.

We have the ability to pack, package, prepare, prime, and post your products to your exacting standards.


Please talk to our sales representatives or project managers today about your warehousing and storage requirements.


Secondary Processing

Pad Printing

Physical changes within the ink film both on the cliché and on the pad allow it to leave the etched image area in favor of adhering to the pad, and to subsequently release from the pad in favor of adhering to the substrate.

The unique properties of the silicone pad enable it to pick the image up from a flat plane and transfer it to a variety of surfaces, such as flat, cylindrical, spherical, compound angles, textures, concave, or convex surfaces.

Pad-printing is one of the many secondary services we offer at CHT that can be incorporated into any part of your production requirements.

We ave experience in printing onto various materials for the medical, auto, home appliance, and office automation industries.

We have produced:

  • Car interior control panels.
  • Loudspeaker facias.
  • Printer / Fax / Multi-purpose Machine panels.
  • Telephones / Mobile handsets.
  • Projectors.
  • Medical Electrical Appliances.


Spray Painting

One of the many finish options available for your parts, spray painting offers an unlimited number of color options where plain raw material colors may not suffice.

Examples of this include brand color matching (for example 'Coca Cola™ Red®' is hard to match with raw material, but can be color-matched with spray painting).

Spray painting also offers a fast and accurate way to apply a micro-thin layer of paint to difficult surfaces in a minimal amount of time, making it ideal for small-part projects, as well as complicated shapes.

At Changhong Technology, we have 16 spray painting stations in our secondary processing center and numerous industrial heaters/ovens on a 30m long conveyor-belt system to ensure fast and efficient production of your parts, to your specification.


Hot Stamping

Hot stamping is a dry printing method in which a heated die and foil are used to apply graphics to a surface. This is one method of security printing.

Hot Stamping Process

Hot stamping is a straightforward process:

  • A die is mounted and heated.
  • Foil is positioned above the material to be imprinted.
  • A combination of heat, dwell time, pressure and stripping time control the quality of the stamp.

Foil stamping is environmentally friendly due to it being a dry process. It does not use solvents or inks and does not create any harmful vapors.

A successful hot stamping job is directly related to the quality of the original artwork. In order to ensure the highest quality reproduction of an imprint, the original artwork should be "camera-ready". The better the artwork at the beginning, the better the imprint reproduction result. The key to a successful hot stamping job is threefold; the first is creating a fixture to support the part firmly under the decorating area. Second, the fixture must also position the part for repeatability of the graphic location. And third, the fixture must allow the operator to easily load and unload the part from the fixture.


Ultrasonic Welding

Ultrasonic Welding is a technique used to permanently bond two pieces of plastic together. It is often used when manufacturing home appliances or electrical items that are not intended to be opened after production.

These include:

  • Computer Mouse.
  • Remote Control Device.
  • Electric Toothbrush.
  • Plastic Flashlights (like dive lights).
  • Handheld Games consoles.

The permanent seal means that the item would have to be destroyed for an end-user to access the inner-workings of the device. This can ensure the owner does not damage it, it can add extra protection of patented and protected technology, can provide water-proof characteristics, and can provide a strong, smooth seal along edges.

At Changhong Technology, we offer ultrasonic welding to any projects that require it. The machine can either be located in the injection workshop for instant welding after injection or further down the production line to suit your assembly requirements.


Assembly / EMS


Every lean assembly line starts with good planning.

We calculate a line based on the following factors:

Task Outcome: This might be full or sub-assembly, with key identifying output goals.

Takt Time: The target time in seconds it takes to complete the entire task.

Number of steps: bite-size steps to work through to complete the task.

Monthly Output Rate: The number of completed items you require each month.

Facilities requirements: Number of staff; Number of lines; Physical size of each line; Utilities (electricity, water, etc.).

Testing Requirements: How to ensure the product is ready for the next stage, but further work or sent to market. This stage also helps us plan the test equipment.

Reporting: Usually weekly, as specified by the client.

Work Instructions: A clear, visual overview of each step of the assembly process.

Our Assembly Experience

For a number of years we have been producing high-volume full-assembly and sub-assembly parts for some of the Auto, Medical, and OA Industries' biggest movers and shakers.

From steering wheel electric units to complete fax / copy / scanner machines, urine bags to insulin pens, we have experience designing, planning, executing, and maintaining ultra-efficient assembly systems in any of our multiple locations.

Production First

Many of our assembly projects have come about from clients producing parts with us, who then require assembly and packaging services, but want to keep everything under one roof. This saves on management costs, time, and helps by giving you just one single point of communication from start to finish.

Cost Savings

Despite the obvious time and management cost savings by keeping production and assembly at Changhong Technology, we can also offer otherwise hard-to-obtain savings in areas of raw material purchase, sub-component, and parts purchase and in-coming parts inspection. Being a well-established Chinese brand, we are in a strong position to source the best parts and materials at the right price, saving the client on taxes and additional fees wherever we can.

ISO Class 8 Medical Clean Room

For products requiring a 'clean room' environment for production, our 4,000m² ISO class 8 100K clean room offers the ideal environment for both plastic parts production, medical consumables sub, and full assembly, testing, inspection, and packaging.

In instances where a line also has ISO Class 7 requirements, we have - in the past - created 10K (Class 7) spaces within the Class 8 cleanroom space so as to accommodate the particular requirements.


Through years of experience, we have come to appreciate that no 2 assembly projects are the same. Whilst assembly, on the whole, has shared values, such as those listed above, each and every project requires the careful attention of our line planners, managers, and engineers to ensure that the optimal line is put in place.

Contact us today to discuss your next project and let us show you how we can turn your targets into our purpose.


Injection Production

CHT injection molding production management must have a deep understanding of injection molding production management system, data cost management systems, quality management systems, and PIE management. It is necessary to design a scientific and feasible management plan according to the actual situation of the enterprise at this stage, and only through comprehensive system improvement Organizational structure, standardize production management process, formulate injection molding process standardization, and equipment mold maintenance management system; at the same time, establish a correct working concept, and earnestly implement PDCA management methods, continuously optimize production process flow, and enhance the cost awareness of personnel in various positions. Fundamentally prevent various major abnormal problems in injection molding production.

A: Organizational structure

(CHT believes that the establishment of the injection molding production management system should be based on the organizational structure. The organizational chart and job description are very important signs of the injection molding production management factory.)

B: Production management system

(CHT continuously adjusts and optimizes the production management process to face the rapidly changing market and quickly respond to customer needs. The injection molding production management system also needs to be refined to improve operational efficiency and reduce operations cost, it is necessary to be able to adapt to the rapid launch of new services and continuous refinement of management needs with the rapid deployment of new processes.)

C: Quality management system

(CHT "Product quality is the life of an enterprise". To produce high-quality products, we need to work together, be familiar with every detail in each link, and strengthen each key point Controlling and forming high-quality products is a working concept through design and management; scientifically prevent the occurrence of problems before mass production, strengthen inspection control and self-inspection during mass production, etc.)

① Standardization of injection molding process

(Production process is the core foundation to ensure product quality. Quality standards determine process standards. Injection molding process standards should be divided into injection molding process parameter standards, operation, and packaging process standards.)

② Standardization of equipment and mold maintenance management

(The molding quality of products mainly depends on the equipment, molds, raw materials and injection molding process parameters, and stable equipment and molds. This requires us to implement thorough standardization of equipment and mold maintenance management.)

D: Injection cost data management/PIE management

(CHT is based on data management, and production management decisions are based on facts and data; ERP system is a good data management tool, and related systems have been developed according to the actual situation to collect and organize data carefully. Data analysis ensures that the data is objective and truthful. It provides a basis for production management decision-making and performance evaluation; classifies, counts, and analyzes various quality defects in accordance with the prescribed procedures, holds quality improvement meetings every week, and develops major defect quality improvement plan items (import PIE management), And carefully organize the implementation.)

E: Training management system

(CHT attaches great importance to people are the core of the five elements of production, and all production plans are executed by people. When the plan is determined, the effect of the work mainly depends on the job skills and service awareness of the executive position. This must be based on your own reality. Develop a training management system to meet the development needs of the factory.)

1. In accordance with the training management system, the person responsible for the training project must be implemented, and the training plan must be made, with the focus on tracking the training effect until the requirements are met.

2. The training content focuses on the following points:

  • Workshop site 5S management specifications
  • Workshop equipment safety operation regulations
  • Work process guidance
  • Quality Standard Management Practice
  • Production report filling specification
  • Position responsibilities
  • Improve the KPI performance appraisal management system