Solid molding machine LSR molding machine different?

 Solid rubber molding machines  and liquid silicone rubber (LSR) molding machines differ significantly in terms of material properties, process principles, equipment design, and application scenarios. The following is a detailed comparison of the core differences between the two:

I. Material State and Processing Method

| **Comparison Items** | **Solid Silicone Rubber (HTV) Molding Machine**  Liquid Silicone Rubber (LSR) Molding Machine

| **Raw Material Form** | Solid rubber compound (premixed blocks or granules)  Two-component liquid (A rubber + B rubber containing vulcanizing agent)

| **Storage Conditions** | Store at room temperature, protected from light and moisture (no low temperature required) | Requires low temperature storage (5-25℃) to prevent premature vulcanization of B rubber.

| **Mixing Method** | Usually mixed in an open mill (offline processing) | Online two-component precision metering and mixing (ratio ±0.5%)

II. Molding Process and Equipment Characteristics

| **Comparison Items** | **Solid Silicone Rubber Molding Machine** | **Liquid Silicone Rubber Molding Machine**

| **Mainstream Processes** | Compression Molding (flat vulcanizing machine) | Injection Molding (liquid injection molding machine)

| **Molding Temperature** |High Temperature & High Pressure (160-200℃, 10-20MPa) |Medium-High Temperature (120-180℃), Low Pressure (5-15MPa)

| **Vulcanization Method** |In-mold heating and pressure vulcanization (requires pre-formed rubber compound) |Liquid mixing and rapid vulcanization during injection molding |

| **Key Equipment Components** |Flat vulcanizing machine, pre-forming machine |Two-component metering pump, cold runner system, dynamic mixing head |

| **Mold Design** |Simple structure, wear-resistant parting surface |Cold runner or runnerless design, complex venting system |

III. Production Characteristics Comparison

| Comparison Item | Solid silicone rubber molding machine vs. liquid silicone rubber molding machine

| Production Cycle |Long (3-15 minutes, depends on mold heating efficiency) |Short (10-60 seconds, rapid injection vulcanization)

| Scrap Rate |High (requires manual trimming of scraps) |Extremely low (no scrap in cold runner system, accurate metering)

| Automation Level | Low (Manual part handling, more post-processing) | High (Fully automated injection molding, part handling, online inspection)

| Applicable Products | Thick-walled products (sealing rings, industrial gaskets) | Thin-walled/precision parts (medical catheters, baby bottle nipples)

| Cleanliness Requirements | General (industrial environment) | High (Requires cleanroom, medical/food grade certification)

IV. Typical Equipment Comparison

| Machine Examples | **Solid Silicone Molding Machine** | **Liquid Silicone Injection Molding Machine**

| Representative: Domestic XJL Machinery |

| Energy Consumption | Higher (High-power heating plate + hydraulic system) | Lower (Servo motor drive + precise temperature control)

| Mold Cost | Low (Low steel requirements, simple structure) | High (Requires cold runner, high-precision machining)

V. Summary of Advantages and Disadvantages

Solid Silicone Molding Machine:

- **Advantages:** - Low equipment and mold costs, suitable for small batch/customized production; - High yield of thick-walled products, stable material mechanical properties. - **Disadvantages**: - Low efficiency, reliant on manual operation; - Limited product precision (±0.2mm), difficult to produce complex structures.

Liquid Silicone Molding Machine

- **Advantages**: - High efficiency, high precision (±0.05mm), suitable for microstructured products; - No waste, clean production, meets medical-grade certification. - **Disadvantages**: - High equipment investment (3-5 times that of solid-state machines); - Liquid silicone storage and mixing require strict temperature control.

VI. Selection Recommendations**

1. **Choose a solid-state machine:** For simple products, low output (e.g., seals, industrial parts) or limited budget.

2. **Choose a liquid-state machine:** For medical/food applications, thin-walled precision parts (e.g., nipples, medical catheters), or ultra-high-volume production.

The two processes can complement each other, and some companies will configure both types of equipment to meet diverse needs.