diff --git a/src/utils/html_generator.py b/src/utils/html_generator.py
index 5d3d576..58eed89 100644
--- a/src/utils/html_generator.py
+++ b/src/utils/html_generator.py
@@ -501,28 +501,60 @@ class HTMLGenerator:
         let isSplit = false;
         let splitAnimId = null;
 
+        // 根据材料类型确定分模方向
+        function getPartingDirection() {{
+            // 优先使用后端传递的 parting_direction
+            if (cavityData?.metadata?.parting_direction) {{
+                return cavityData.metadata.parting_direction;
+            }}
+            if (cavityData?.manufacturing_info?.parting_direction) {{
+                return cavityData.manufacturing_info.parting_direction;
+            }}
+            // 泡沫材料默认 Z 轴
+            if (cavityData?.metadata?.is_foam) {{
+                return 'Z';
+            }}
+            // 默认 Z 轴
+            return 'Z';
+        }}
+
         function splitMold() {{
             if (!cavityMesh && !coreMesh) return;
             isSplit = !isSplit;
             const btn = document.getElementById('splitBtn');
             btn.textContent = isSplit ? '合模' : '分模拆分';
 
-            // 计算拆分距离：取边界框高度的 40%
             const bboxDims = geometryData.bounding_box?.dimensions || [100, 100, 100];
-            const splitDist = bboxDims[1] * 0.4;
+            const dir = getPartingDirection();
 
-            // 目标位置
-            const cavityTargetY = isSplit ? splitDist : 0;
-            const coreTargetY = isSplit ? -splitDist : 0;
+            // 根据分模方向确定拆分轴和距离
+            let splitDist, axis;
+            if (dir === 'Z') {{
+                // Z轴上下开模：拆分距离取 Z 方向高度的 40%
+                splitDist = bboxDims[2] * 0.4;
+                axis = 'z';
+            }} else if (dir === 'Y') {{
+                // Y轴前后开模
+                splitDist = bboxDims[1] * 0.4;
+                axis = 'y';
+            }} else {{
+                // X轴左右开模
+                splitDist = bboxDims[0] * 0.4;
+                axis = 'x';
+            }}
 
             // 分型面动画目标透明度
             const partingTargetOpacity = isSplit ? 0 : 0.3;
 
             // 记录起始位置
-            const cavityStartY = cavityMesh ? cavityMesh.position.y : 0;
-            const coreStartY = coreMesh ? coreMesh.position.y : 0;
+            const cavityStart = cavityMesh ? cavityMesh.position[axis] : 0;
+            const coreStart = coreMesh ? coreMesh.position[axis] : 0;
             const partingStartOpacity = partingMesh ? partingMesh.material.opacity : 0.3;
 
+            // 目标位置：型腔正向移动，型芯负向移动
+            const cavityTarget = isSplit ? splitDist : 0;
+            const coreTarget = isSplit ? -splitDist : 0;
+
             const duration = 800; // ms
             const startTime = performance.now();
 
@@ -535,10 +567,10 @@ class HTMLGenerator:
                 const ease = t < 0.5 ? 4 * t * t * t : 1 - Math.pow(-2 * t + 2, 3) / 2;
 
                 if (cavityMesh) {{
-                    cavityMesh.position.y = cavityStartY + (cavityTargetY - cavityStartY) * ease;
+                    cavityMesh.position[axis] = cavityStart + (cavityTarget - cavityStart) * ease;
                 }}
                 if (coreMesh) {{
-                    coreMesh.position.y = coreStartY + (coreTargetY - coreStartY) * ease;
+                    coreMesh.position[axis] = coreStart + (coreTarget - coreStart) * ease;
                 }}
                 if (partingMesh) {{
                     partingMesh.material.opacity = partingStartOpacity + (partingTargetOpacity - partingStartOpacity) * ease;